From 9c0d9ce3285864062f74951871971fec1debeafb Mon Sep 17 00:00:00 2001 From: Dimitri Schoolwerth Date: Fri, 25 Nov 2011 22:25:11 +0000 Subject: [PATCH] merged libpng 1.5.6 to trunk git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69822 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775 --- src/png/ANNOUNCE | 114 +- src/png/CHANGES | 2322 ++- src/png/CMakeLists.txt | 228 +- src/png/INSTALL | 47 +- src/png/LICENSE | 6 +- src/png/Makefile.am | 132 - src/png/Makefile.in | 1261 -- src/png/README | 95 +- src/png/TODO | 10 +- src/png/aclocal.m4 | 9036 ---------- src/png/autogen.sh | 34 - src/png/config.guess | 1508 -- src/png/config.h.in | 86 - src/png/config.sub | 1739 -- src/png/configure | 14007 +--------------- src/png/configure.ac | 140 - src/png/depcomp | 630 - src/png/example.c | 47 +- src/png/install-sh | 520 - src/png/libpng-config.in | 6 +- .../{libpng-1.4.4.txt => libpng-manual.txt} | 2047 ++- src/png/libpng.3 | 2443 ++- src/png/libpngpf.3 | 796 +- src/png/ltmain.sh | 8745 ---------- src/png/missing | 376 - src/png/png.5 | 2 +- src/png/png.c | 2319 ++- src/png/png.h | 2618 ++- src/png/pngconf.h | 1704 +- src/png/pngdebug.h | 157 + src/png/pngerror.c | 550 +- src/png/pngget.c | 786 +- src/png/pnginfo.h | 269 + src/png/pnglibconf.h | 187 + src/png/pngmem.c | 262 +- src/png/pngpread.c | 565 +- src/png/pngpriv.h | 1408 +- src/png/pngread.c | 760 +- src/png/pngrio.c | 41 +- src/png/pngrtran.c | 3438 ++-- src/png/pngrutil.c | 2258 ++- src/png/pngset.c | 716 +- src/png/pngstruct.h | 357 + src/png/pngtest.c | 364 +- src/png/pngtest.png | Bin 8608 -> 8695 bytes src/png/pngtrans.c | 359 +- src/png/pngvalid.c | 9697 +++++++++++ src/png/pngwio.c | 59 +- src/png/pngwrite.c | 797 +- src/png/pngwtran.c | 173 +- src/png/pngwutil.c | 1426 +- src/png/projects/owatcom/libpng.tgt | 383 + src/png/projects/owatcom/libpng.wpj | 92 + src/png/projects/owatcom/pngconfig.mak | 160 + src/png/projects/owatcom/pngtest.tgt | 179 + src/png/projects/owatcom/pngvalid.tgt | 210 + src/png/projects/visualc6/README.txt | 57 - src/png/projects/visualc6/libpng.dsp | 328 - src/png/projects/visualc6/libpng.dsw | 59 - src/png/projects/visualc6/pngtest.dsp | 178 - src/png/projects/visualc71/PRJ0041.mak | 2 +- src/png/projects/visualc71/README.txt | 6 +- src/png/projects/visualc71/libpng.vcproj | 72 +- src/png/projects/visualc71/pngtest.vcproj | 2 +- .../projects/vstudio/libpng/libpng.vcxproj | 466 +- .../vstudio/pnglibconf/pnglibconf.vcxproj | 60 + .../projects/vstudio/pngtest/pngtest.vcxproj | 436 +- .../vstudio/pngvalid/pngvalid.vcxproj | 219 + src/png/projects/vstudio/readme.txt | 69 +- src/png/projects/vstudio/vstudio.sln | 48 +- src/png/projects/vstudio/zlib.props | 44 +- src/png/projects/vstudio/zlib/zlib.vcxproj | 286 +- src/png/projects/xcode/README.txt | 3 - .../xcode/libpng.xcodeproj/.gitignore | 2 - .../xcode/libpng.xcodeproj/project.pbxproj | 805 - src/png/scripts/README.txt | 37 +- src/png/scripts/checksym.awk | 161 + src/png/scripts/chkfmt | 137 + src/png/scripts/def.dfn | 38 + src/png/scripts/descrip.mms | 30 +- src/png/scripts/libpng-config-head.in | 2 +- src/png/scripts/libpng.pc.in | 6 +- src/png/scripts/makefile.32sunu | 58 +- src/png/scripts/makefile.64sunu | 58 +- src/png/scripts/makefile.acorn | 7 + src/png/scripts/makefile.aix | 57 +- src/png/scripts/makefile.amiga | 9 +- src/png/scripts/makefile.atari | 8 + src/png/scripts/makefile.bc32 | 38 +- src/png/scripts/makefile.beos | 63 +- src/png/scripts/makefile.bor | 37 +- src/png/scripts/makefile.cegcc | 17 +- src/png/scripts/makefile.cygwin | 291 - src/png/scripts/makefile.darwin | 68 +- src/png/scripts/makefile.dec | 58 +- src/png/scripts/makefile.dj2 | 42 +- src/png/scripts/makefile.elf | 76 +- src/png/scripts/makefile.freebsd | 11 +- src/png/scripts/makefile.gcc | 42 +- src/png/scripts/makefile.hp64 | 60 +- src/png/scripts/makefile.hpgcc | 61 +- src/png/scripts/makefile.hpux | 60 +- src/png/scripts/makefile.ibmc | 37 +- src/png/scripts/makefile.intel | 36 +- src/png/scripts/makefile.knr | 44 +- src/png/scripts/makefile.linux | 64 +- src/png/scripts/makefile.mingw | 282 - src/png/scripts/makefile.mips | 43 +- src/png/scripts/makefile.msc | 36 +- src/png/scripts/makefile.ne12bsd | 14 +- src/png/scripts/makefile.netbsd | 14 +- src/png/scripts/makefile.openbsd | 16 +- src/png/scripts/makefile.os2 | 72 - src/png/scripts/makefile.sco | 61 +- src/png/scripts/makefile.sggcc | 68 +- src/png/scripts/makefile.sgi | 70 +- src/png/scripts/makefile.so9 | 60 +- src/png/scripts/makefile.solaris | 62 +- src/png/scripts/makefile.solaris-x86 | 62 +- src/png/scripts/makefile.std | 66 +- src/png/scripts/makefile.sunos | 43 +- src/png/scripts/makefile.tc3 | 36 +- src/png/scripts/makefile.vcwin32 | 41 +- src/png/scripts/makefile.watcom | 112 - src/png/scripts/makevms.com | 32 +- src/png/scripts/options.awk | 734 + src/png/scripts/png32ce.def | 259 - src/png/scripts/pnglibconf.dfa | 578 + src/png/scripts/pnglibconf.h.prebuilt | 187 + src/png/scripts/pnglibconf.mak | 57 + src/png/scripts/pngos2.def | 255 - src/png/scripts/pngwin.def | 216 - src/png/scripts/smakefile.ppc | 3 +- src/png/scripts/sym.dfn | 15 + src/png/scripts/symbols.def | 241 + src/png/scripts/symbols.dfn | 57 + src/png/scripts/vers.dfn | 26 + src/png/test-pngtest.sh | 3 - 138 files changed, 34059 insertions(+), 53288 deletions(-) delete mode 100644 src/png/Makefile.am delete mode 100644 src/png/Makefile.in delete mode 100644 src/png/aclocal.m4 delete mode 100755 src/png/autogen.sh delete mode 100755 src/png/config.guess delete mode 100644 src/png/config.h.in delete mode 100755 src/png/config.sub delete mode 100644 src/png/configure.ac delete mode 100755 src/png/depcomp delete mode 100755 src/png/install-sh rename src/png/{libpng-1.4.4.txt => libpng-manual.txt} (64%) delete mode 100755 src/png/ltmain.sh delete mode 100755 src/png/missing create mode 100644 src/png/pngdebug.h create mode 100644 src/png/pnginfo.h create mode 100644 src/png/pnglibconf.h create mode 100644 src/png/pngstruct.h create mode 100644 src/png/pngvalid.c create mode 100644 src/png/projects/owatcom/libpng.tgt create mode 100644 src/png/projects/owatcom/libpng.wpj create mode 100755 src/png/projects/owatcom/pngconfig.mak create mode 100644 src/png/projects/owatcom/pngtest.tgt create mode 100644 src/png/projects/owatcom/pngvalid.tgt delete mode 100644 src/png/projects/visualc6/README.txt delete mode 100644 src/png/projects/visualc6/libpng.dsp delete mode 100644 src/png/projects/visualc6/libpng.dsw delete mode 100644 src/png/projects/visualc6/pngtest.dsp create mode 100644 src/png/projects/vstudio/pnglibconf/pnglibconf.vcxproj create mode 100644 src/png/projects/vstudio/pngvalid/pngvalid.vcxproj delete mode 100644 src/png/projects/xcode/README.txt delete mode 100644 src/png/projects/xcode/libpng.xcodeproj/.gitignore delete mode 100644 src/png/projects/xcode/libpng.xcodeproj/project.pbxproj create mode 100755 src/png/scripts/checksym.awk create mode 100755 src/png/scripts/chkfmt create mode 100644 src/png/scripts/def.dfn delete mode 100644 src/png/scripts/makefile.cygwin delete mode 100644 src/png/scripts/makefile.mingw delete mode 100644 src/png/scripts/makefile.os2 delete mode 100644 src/png/scripts/makefile.watcom create mode 100755 src/png/scripts/options.awk delete mode 100644 src/png/scripts/png32ce.def create mode 100644 src/png/scripts/pnglibconf.dfa create mode 100644 src/png/scripts/pnglibconf.h.prebuilt create mode 100755 src/png/scripts/pnglibconf.mak delete mode 100644 src/png/scripts/pngos2.def delete mode 100644 src/png/scripts/pngwin.def create mode 100644 src/png/scripts/sym.dfn create mode 100644 src/png/scripts/symbols.def create mode 100644 src/png/scripts/symbols.dfn create mode 100644 src/png/scripts/vers.dfn delete mode 100755 src/png/test-pngtest.sh diff --git a/src/png/ANNOUNCE b/src/png/ANNOUNCE index f160172fb1..d8ad39e51f 100644 --- a/src/png/ANNOUNCE +++ b/src/png/ANNOUNCE @@ -1,5 +1,4 @@ - -Libpng 1.4.4 - September 23, 2010 +Libpng 1.5.6 - November 3, 2011 This is a public release of libpng, intended for use in production codes. @@ -8,58 +7,81 @@ Files available for download: Source files with LF line endings (for Unix/Linux) and with a "configure" script - libpng-1.4.4.tar.xz (LZMA-compressed, recommended) - libpng-1.4.4.tar.gz - libpng-1.4.4.tar.bz2 + libpng-1.5.6.tar.xz (LZMA-compressed, recommended) + libpng-1.5.6.tar.gz + libpng-1.5.6.tar.bz2 Source files with CRLF line endings (for Windows), without the "configure" script - lpng144.zip - lpng144.7z + lpng156.7z (LZMA-compressed, recommended) + lpng156.zip Other information: - libpng-1.4.4-README.txt - libpng-1.4.4-LICENSE.txt + libpng-1.5.6-README.txt + libpng-1.5.6-LICENSE.txt + +Changes since the last public release (1.5.5): -Changes since the last public release (1.4.3): - Removed extraneous new_push_process_row.c file. - Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5 - Removed some newly-added TAB characters from pngpread.c. - Fixed some indentation in pngpread.c and pngrutil.c - Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans) - Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {') - Put "#ifndef PNG_EXTERN, #endif" around "#define PNG_EXTERN" in pngpriv.h - Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2 - Moved the definition of png_snprintf() outside of the enclosing - #ifdef blocks in pngconf.h - Made a special case "#define PNGAPI" in pngconf.h for WATCOM. - Removed reference to cbuilder5/* from Makefile.in and Makefile.am - Updated the read macros and functions from 1.5.0beta38. - Updated projects/visualc71 so it can find scripts/pnglibconf.h - Removed unused png_mem_* defines from pngconf.h. - Correct use of _WINDOWS_ in pngconf.h - Don't try to use version-script with cygwin/mingw. - Revised contrib/gregbook to work under cygwin/mingw. - Updated prebuilt aclocal.m4 and ltmain.sh - Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov) - Updated CMakelists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for - installing libpng in /usr/lib64 (Funda Wang). - Revised CMakeLists.txt to put the man pages in share/man/man* not man/man* - Revised CMakeLists.txt to make symlinks instead of copies when installing. - Moved "#include pngusr.h" ahead of PNG_USER_PRIVATEBUILD test in pngconf.h - Eliminated a deprecated reference to png_ptr->io_ptr in pngtest.c - Eliminated new unnecessary #if tests regarding the sCAL chunk from pngrutil.c - Updated the xcode project to work with libpng-1.4.x and added iOS targets - for simulator and device (Philippe Hausler). - Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER, - $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE - Rebuilt configure scripts with automake-1.11.1 instead of automake-1.11. - Removed unused mkinstalldirs file. + Fixed some 64-bit type conversion warnings in pngrtran.c + Moved row_info from png_struct to a local variable. + The various interlace mask arrays have been made into arrays of + bytes and made PNG_CONST and static (previously some arrays were + marked PNG_CONST and some weren't). + Additional checks have been added to the transform code to validate the + pixel depths after the transforms on both read and write. + Removed some redundant code from pngwrite.c, in png_desgtroy_write_struct(). + Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4]. + This removes the need to allocate temporary strings for chunk names on + the stack in the read/write code. Unknown chunk handling still uses the + string form because this is exposed in the API. + Added a note in the manual the png_read_update_info() must be called only + once with a particular info_ptr. + Revised test-pngtest.sh to report FAIL when pngtest fails. + Added "--strict" option to pngtest, to report FAIL when the failure is + only because the resulting valid files are different. + Revised CMakeLists.txt to work with mingw and removed some material from + CMakeLists.txt that is no longer useful in libpng-1.5. + Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")." + Speed up png_combine_row() for interlaced images. This reduces the generality + of the code, allowing it to be optimized for Adam7 interlace. The masks + passed to png_combine_row() are now generated internally, avoiding + some code duplication and localizing the interlace handling somewhat. + Align png_struct::row_buf - previously it was always unaligned, caused by + a bug in the code that attempted to align it; the code needs to subtract + one from the pointer to take account of the filter byte prepended to + each row. + Optimized png_combine_row() when rows are aligned. This gains a small + percentage for 16-bit and 32-bit pixels in the typical case where the + output row buffers are appropriately aligned. The optimization was not + previously possible because the png_struct buffer was always misaligned. + Removed two redundant tests for unitialized row. + Fixed a relatively harmless memory overwrite in compressed text writing + with a 1 byte zlib buffer. + Add ability to call png_read_update_info multiple times to pngvalid.c + Fixes for multiple calls to png_read_update_info. These fixes attend to + most of the errors revealed in pngvalid, however doing the gamma work + twice results in inaccuracies that can't be easily fixed. There is now + a warning in the code if this is going to happen. + Turned on multiple png_read_update_info in pngvalid transform tests. + Prevent libpng from overwriting unused bits at the end of the image when + it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would + overwrite the partial byte at the end of each row if the row width was not + an exact multiple of 8 bits and the image is not interlaced. + Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row + (Mans Rullgard). + Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM" + Added PNG_LSR() and PNG_LSL() macros to defend against buggy compilers that + evaluate non-taken code branches and complain about out-of-range shifts. + Renamed the local variable 'byte' because it appears in a MSYS header + file. + Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h -Send comments/corrections/commendations to glennrp at users.sourceforge.net -or to png-mng-implement at lists.sf.net (subscription required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-implement). +Send comments/corrections/commendations to png-mng-implement at lists.sf.net +(subscription required; visit +https://lists.sourceforge.net/lists/listinfo/png-mng-implement +to subscribe) +or to glennrp at users.sourceforge.net Glenn R-P diff --git a/src/png/CHANGES b/src/png/CHANGES index 271ca1aecf..45316865f8 100644 --- a/src/png/CHANGES +++ b/src/png/CHANGES @@ -1,12 +1,11 @@ #if 0 -libpng_changes(){ /* CHANGES - changes for libpng -version 0.2 +Version 0.2 added reader into png.h fixed small problems in stub file -version 0.3 +Version 0.3 added pull reader split up pngwrite.c to several files added pnglib.txt @@ -15,9 +14,9 @@ version 0.3 fixed some bugs in writer interfaced with zlib 0.5 added K&R support - added check for 64 KB blocks for 16 bit machines + added check for 64 KB blocks for 16-bit machines -version 0.4 +Version 0.4 cleaned up code and commented code simplified time handling into png_time created png_color_16 and png_color_8 to handle color needs @@ -28,28 +27,28 @@ version 0.4 cleaned up zTXt reader and writer (using zlib's Reset functions) split transformations into pngrtran.c and pngwtran.c -version 0.5 +Version 0.5 interfaced with zlib 0.8 fixed many reading and writing bugs saved using 3 spaces instead of tabs -version 0.6 +Version 0.6 added png_large_malloc() and png_large_free() added png_size_t cleaned up some compiler warnings added png_start_read_image() -version 0.7 +Version 0.7 cleaned up lots of bugs finished dithering and other stuff added test program changed name from pnglib to libpng -version 0.71 [June, 1995] +Version 0.71 [June, 1995] changed pngtest.png for zlib 0.93 fixed error in libpng.txt and example.c -version 0.8 +Version 0.8 cleaned up some bugs added png_set_filler() split up pngstub.c into pngmem.c, pngio.c, and pngerror.c @@ -63,191 +62,194 @@ version 0.8 changed external functions passing floats to doubles (k&r problems?) put all the configurable stuff in pngconf.h enabled png_set_shift to work with paletted images on read - added png_read_update_info() - updates info structure with - transformations + added png_read_update_info() - updates info structure with transformations -version 0.81 [August, 1995] +Version 0.81 [August, 1995] incorporated Tim Wegner's medium model code (thanks, Tim) -version 0.82 [September, 1995] +Version 0.82 [September, 1995] [unspecified changes] -version 0.85 [December, 1995] +Version 0.85 [December, 1995] added more medium model code (almost everything's a far) added i/o, error, and memory callback functions - fixed some bugs (16 bit, 4 bit interlaced, etc.) + fixed some bugs (16-bit, 4-bit interlaced, etc.) added first run progressive reader (barely tested) -version 0.86 [January, 1996] +Version 0.86 [January, 1996] fixed bugs improved documentation -version 0.87 [January, 1996] +Version 0.87 [January, 1996] fixed medium model bugs fixed other bugs introduced in 0.85 and 0.86 added some minor documentation -version 0.88 [January, 1996] +Version 0.88 [January, 1996] fixed progressive bugs replaced tabs with spaces cleaned up documentation added callbacks for read/write and warning/error functions -version 0.89 [July, 1996] - added new initialization API to make libpng work better with shared libs - we now have png_create_read_struct(), png_create_write_struct(), - png_create_info_struct(), png_destroy_read_struct(), and - png_destroy_write_struct() instead of the separate calls to - malloc and png_read_init(), png_info_init(), and png_write_init() - changed warning/error callback functions to fix bug - this means you - should use the new initialization API if you were using the old - png_set_message_fn() calls, and that the old API no longer exists - so that people are aware that they need to change their code - changed filter selection API to allow selection of multiple filters - since it didn't work in previous versions of libpng anyways - optimized filter selection code - fixed png_set_background() to allow using an arbitrary RGB color for - paletted images - fixed gamma and background correction for paletted images, so - png_correct_palette is not needed unless you are correcting an - external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED - in pngconf.h) - if nobody uses this, it may disappear in the future. - fixed bug with Borland 64K memory allocation (Alexander Lehmann) - fixed bug in interlace handling (Smarasderagd, I think) - added more error checking for writing and image to reduce invalid files - separated read and write functions so that they won't both be linked - into a binary when only reading or writing functionality is used - new pngtest image also has interlacing and zTXt - updated documentation to reflect new API - -version 0.90 [January, 1997] - made CRC errors/warnings on critical and ancillary chunks configurable +Version 0.89 [July, 1996] + Added new initialization API to make libpng work better with shared libs + we now have png_create_read_struct(), png_create_write_struct(), + png_create_info_struct(), png_destroy_read_struct(), and + png_destroy_write_struct() instead of the separate calls to + malloc and png_read_init(), png_info_init(), and png_write_init() + Changed warning/error callback functions to fix bug - this means you + should use the new initialization API if you were using the old + png_set_message_fn() calls, and that the old API no longer exists + so that people are aware that they need to change their code + Changed filter selection API to allow selection of multiple filters + since it didn't work in previous versions of libpng anyways + Optimized filter selection code + Fixed png_set_background() to allow using an arbitrary RGB color for + paletted images + Fixed gamma and background correction for paletted images, so + png_correct_palette is not needed unless you are correcting an + external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED + in pngconf.h) - if nobody uses this, it may disappear in the future. + Fixed bug with Borland 64K memory allocation (Alexander Lehmann) + Fixed bug in interlace handling (Smarasderagd, I think) + Added more error checking for writing and image to reduce invalid files + Separated read and write functions so that they won't both be linked + into a binary when only reading or writing functionality is used + New pngtest image also has interlacing and zTXt + Updated documentation to reflect new API + +Version 0.90 [January, 1997] + Made CRC errors/warnings on critical and ancillary chunks configurable libpng will use the zlib CRC routines by (compile-time) default - changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner) - added external C++ wrapper statements to png.h (Gilles Dauphin) - allow PNG file to be read when some or all of file signature has already - been read from the beginning of the stream. ****This affects the size - of info_struct and invalidates all programs that use a shared libpng**** - fixed png_filler() declarations - fixed? background color conversions - fixed order of error function pointers to match documentation - current chunk name is now available in png_struct to reduce the number - of nearly identical error messages (will simplify multi-lingual - support when available) - try to get ready for unknown-chunk callback functions: - - previously read critical chunks are flagged, so the chunk handling - routines can determine if the chunk is in the right place - - all chunk handling routines have the same prototypes, so we will - be able to handle all chunks via a callback mechanism - try to fix Linux "setjmp" buffer size problems - removed png_large_malloc, png_large_free, and png_realloc functions. - -version 0.95 [March, 1997] - fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never - fixed bug in PNG file signature compares when start != 0 - changed parameter type of png_set_filler(...filler...) from png_byte - to png_uint_32 - added test for MACOS to ensure that both math.h and fp.h are not #included - added macros for libpng to be compiled as a Windows DLL (Andreas Kupries) - added "packswap" transformation, which changes the endianness of - packed-pixel bytes (Kevin Bracey) - added "strip_alpha" transformation, which removes the alpha channel of - input images without using it (not necessarily a good idea) - added "swap_alpha" transformation, which puts the alpha channel in front - of the color bytes instead of after - removed all implicit variable tests which assume NULL == 0 (I think) - changed several variables to "png_size_t" to show 16/32-bit limitations - added new pCAL chunk read/write support - added experimental filter selection weighting (Greg Roelofs) - removed old png_set_rgbx() and png_set_xrgb() functions that have been + Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner) + Added external C++ wrapper statements to png.h (Gilles Dauphin) + Allow PNG file to be read when some or all of file signature has already + been read from the beginning of the stream. ****This affects the size + of info_struct and invalidates all programs that use a shared libpng**** + Fixed png_filler() declarations + Fixed? background color conversions + Fixed order of error function pointers to match documentation + Current chunk name is now available in png_struct to reduce the number + of nearly identical error messages (will simplify multi-lingual + support when available) + Try to get ready for unknown-chunk callback functions: + - previously read critical chunks are flagged, so the chunk handling + routines can determine if the chunk is in the right place + - all chunk handling routines have the same prototypes, so we will + be able to handle all chunks via a callback mechanism + Try to fix Linux "setjmp" buffer size problems + Removed png_large_malloc, png_large_free, and png_realloc functions. + +Version 0.95 [March, 1997] + Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never + Fixed bug in PNG file signature compares when start != 0 + Changed parameter type of png_set_filler(...filler...) from png_byte + to png_uint_32 + Added test for MACOS to ensure that both math.h and fp.h are not #included + Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries) + Added "packswap" transformation, which changes the endianness of + packed-pixel bytes (Kevin Bracey) + Added "strip_alpha" transformation, which removes the alpha channel of + input images without using it (not necessarily a good idea) + Added "swap_alpha" transformation, which puts the alpha channel in front + of the color bytes instead of after + Removed all implicit variable tests which assume NULL == 0 (I think) + Changed several variables to "png_size_t" to show 16/32-bit limitations + Added new pCAL chunk read/write support + Added experimental filter selection weighting (Greg Roelofs) + Removed old png_set_rgbx() and png_set_xrgb() functions that have been obsolete for about 2 years now (use png_set_filler() instead) - added macros to read 16- and 32-bit ints directly from buffer, to be - used only on those systems that support it (namely PowerPC and 680x0) - With some testing, this may become the default for MACOS/PPC systems. - only calculate CRC on data if we are going to use it - added macros for zTXt compression type PNG_zTXt_COMPRESSION_??? - added macros for simple libpng debugging output selectable at compile time - removed PNG_READ_END_MODE in progressive reader (Smarasderagd) - more description of info_struct in libpng.txt and png.h - more instructions in example.c - more chunk types tested in pngtest.c - renamed pngrcb.c to pngset.c, and all png_read_ functions to be - png_set_. We now have corresponding png_get_ - functions in pngget.c to get information in info_ptr. This isolates - the application from the internal organization of png_info_struct - (good for shared library implementations). - -version 0.96 [May, 1997] - fixed serious bug with < 8bpp images introduced in 0.95 - fixed 256-color transparency bug (Greg Roelofs) - fixed up documentation (Greg Roelofs, Laszlo Nyul) - fixed "error" in pngconf.h for Linux setjmp() behaviour - fixed DOS medium model support (Tim Wegner) - fixed png_check_keyword() for case with error in static string text - added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul) - added typecasts to quiet compiler errors - added more debugging info - -version 0.97 [January, 1998] - removed PNG_USE_OWN_CRC capability - relocated png_set_crc_action from pngrutil.c to pngrtran.c - fixed typecasts of "new_key", etc. (Andreas Dilger) - added RFC 1152 [sic] date support - fixed bug in gamma handling of 4-bit grayscale - added 2-bit grayscale gamma handling (Glenn R-P) - added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P) - minor corrections in libpng.txt - added simple sRGB support (Glenn R-P) - easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED; - all configurable options can be selected from command-line instead - of having to edit pngconf.h (Glenn R-P) - fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P) - added more conditions for png_do_background, to avoid changing - black pixels to background when a background is supplied and - no pixels are transparent - repaired PNG_NO_STDIO behaviour - tested NODIV support and made it default behaviour (Greg Roelofs) - added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler) - regularized version numbering scheme and bumped shared-library major + Added macros to read 16- and 32-bit ints directly from buffer, to be + used only on those systems that support it (namely PowerPC and 680x0) + With some testing, this may become the default for MACOS/PPC systems. + Only calculate CRC on data if we are going to use it + Added macros for zTXt compression type PNG_zTXt_COMPRESSION_??? + Added macros for simple libpng debugging output selectable at compile time + Removed PNG_READ_END_MODE in progressive reader (Smarasderagd) + More description of info_struct in libpng.txt and png.h + More instructions in example.c + More chunk types tested in pngtest.c + Renamed pngrcb.c to pngset.c, and all png_read_ functions to be + png_set_. We now have corresponding png_get_ + functions in pngget.c to get information in info_ptr. This isolates + the application from the internal organization of png_info_struct + (good for shared library implementations). + +Version 0.96 [May, 1997] + Fixed serious bug with < 8bpp images introduced in 0.95 + Fixed 256-color transparency bug (Greg Roelofs) + Fixed up documentation (Greg Roelofs, Laszlo Nyul) + Fixed "error" in pngconf.h for Linux setjmp() behavior + Fixed DOS medium model support (Tim Wegner) + Fixed png_check_keyword() for case with error in static string text + Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul) + Added typecasts to quiet compiler errors + Added more debugging info + +Version 0.97 [January, 1998] + Removed PNG_USE_OWN_CRC capability + Relocated png_set_crc_action from pngrutil.c to pngrtran.c + Fixed typecasts of "new_key", etc. (Andreas Dilger) + Added RFC 1152 [sic] date support + Fixed bug in gamma handling of 4-bit grayscale + Added 2-bit grayscale gamma handling (Glenn R-P) + Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P) + Minor corrections in libpng.txt + Added simple sRGB support (Glenn R-P) + Easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED; + all configurable options can be selected from command-line instead + of having to edit pngconf.h (Glenn R-P) + Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P) + Added more conditions for png_do_background, to avoid changing + black pixels to background when a background is supplied and + no pixels are transparent + Repaired PNG_NO_STDIO behavior + Tested NODIV support and made it default behavior (Greg Roelofs) + Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler) + Regularized version numbering scheme and bumped shared-library major version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs) -version 0.98 [January, 1998] - cleaned up some typos in libpng.txt and in code documentation - fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler) - cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c - changed recommendation about file_gamma for PC images to .51 from .45, - in example.c and libpng.txt, added comments to distinguish between - screen_gamma, viewing_gamma, and display_gamma. - changed all references to RFC1152 to read RFC1123 and changed the - PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED - added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent) - changed srgb_intent from png_byte to int to avoid compiler bugs - -version 0.99 [January 30, 1998] - free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler) - fixed a longstanding "packswap" bug in pngtrans.c - fixed some inconsistencies in pngconf.h that prevented compiling with - PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined - fixed some typos and made other minor rearrangement of libpng.txt (Andreas) - changed recommendation about file_gamma for PC images to .50 from .51 in - example.c and libpng.txt, and changed file_gamma for sRGB images to .45 - added a number of functions to access information from the png structure - png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit) - added TARGET_MACOS similar to zlib-1.0.8 - define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined - added type casting to all png_malloc() function calls -version 0.99a [January 31, 1998] +Version 0.98 [January, 1998] + Cleaned up some typos in libpng.txt and in code documentation + Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler) + Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c + Changed recommendation about file_gamma for PC images to .51 from .45, + in example.c and libpng.txt, added comments to distinguish between + screen_gamma, viewing_gamma, and display_gamma. + Changed all references to RFC1152 to read RFC1123 and changed the + PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED + Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent) + Changed srgb_intent from png_byte to int to avoid compiler bugs + +Version 0.99 [January 30, 1998] + Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler) + Fixed a longstanding "packswap" bug in pngtrans.c + Fixed some inconsistencies in pngconf.h that prevented compiling with + PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined + Fixed some typos and made other minor rearrangement of libpng.txt (Andreas) + Changed recommendation about file_gamma for PC images to .50 from .51 in + example.c and libpng.txt, and changed file_gamma for sRGB images to .45 + Added a number of functions to access information from the png structure + png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit) + Added TARGET_MACOS similar to zlib-1.0.8 + Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined + Added type casting to all png_malloc() function calls + +Version 0.99a [January 31, 1998] Added type casts and parentheses to all returns that return a value.(Tim W.) -version 0.99b [February 4, 1998] + +Version 0.99b [February 4, 1998] Added type cast png_uint_32 on malloc function calls where needed. Changed type of num_hist from png_uint_32 to int (same as num_palette). Added checks for rowbytes overflow, in case png_size_t is less than 32 bits. Renamed makefile.elf to makefile.lnx. -version 0.99c [February 7, 1998] + +Version 0.99c [February 7, 1998] More type casting. Removed erroneous overflow test in pngmem.c. Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes. Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5. -version 0.99d [February 11, 1998] + +Version 0.99d [February 11, 1998] Renamed "far_to_near()" "png_far_to_near()" Revised libpng.3 Version 99c "buffered" operations didn't work as intended. Replaced them @@ -257,7 +259,8 @@ version 0.99d [February 11, 1998] Check for overlength tRNS chunk present when indexed-color PLTE is read. Cleaned up spelling errors in libpng.3/libpng.txt Corrected a problem with png_get_tRNS() which returned undefined trans array -version 0.99e [February 28, 1998] + +Version 0.99e [February 28, 1998] Corrected png_get_tRNS() again. Add parentheses for easier reading of pngget.c, fixed "||" should be "&&". Touched up example.c to make more of it compileable, although the entire @@ -267,53 +270,59 @@ version 0.99e [February 28, 1998] Replaced pngtest.png with one created with zlib 1.1.1 Changed pngtest to report PASS even when file size is different (Jean-loup G.) Corrected some logic errors in png_do_invert_alpha() (Chris Patterson) -version 0.99f [March 5, 1998] + +Version 0.99f [March 5, 1998] Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey) Moved makefiles into a "scripts" directory, and added INSTALL instruction file Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok) Added pointers to "note on libpng versions" in makefile.lnx and README Added row callback feature when reading and writing nonprogressive rows - and added a test of this feature in pngtest.c + and added a test of this feature in pngtest.c Added user transform callbacks, with test of the feature in pngtest.c -version 0.99g [March 6, 1998, morning] + +Version 0.99g [March 6, 1998, morning] Minor changes to pngtest.c to suppress compiler warnings. Removed "beta" language from documentation. -version 0.99h [March 6, 1998, evening] + +Version 0.99h [March 6, 1998, evening] Minor changes to previous minor changes to pngtest.c Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED - and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro + and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro Added user transform capability -version 1.00 [March 7, 1998] +Version 1.00 [March 7, 1998] Changed several typedefs in pngrutil.c Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik) - replaced "while(1)" with "for(;;)" - added PNGARG() to prototypes in pngtest.c and removed some prototypes - updated some of the makefiles (Tom Lane) - changed some typedefs (s_start, etc.) in pngrutil.c - fixed dimensions of "short_months" array in pngwrite.c + Replaced "while(1)" with "for(;;)" + Added PNGARG() to prototypes in pngtest.c and removed some prototypes + Updated some of the makefiles (Tom Lane) + Changed some typedefs (s_start, etc.) in pngrutil.c + Fixed dimensions of "short_months" array in pngwrite.c Replaced ansi2knr.c with the one from jpeg-v6 -version 1.0.0 [March 8, 1998] +Version 1.0.0 [March 8, 1998] Changed name from 1.00 to 1.0.0 (Adam Costello) Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert) -version 1.0.0a [March 9, 1998] + +Version 1.0.0a [March 9, 1998] Fixed three bugs in pngrtran.c to make gamma+background handling consistent - (Greg Roelofs) + (Greg Roelofs) Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz - for major, minor, and bugfix releases. This is 10001. (Adam Costello, - Tom Lane) + for major, minor, and bugfix releases. This is 10001. (Adam Costello, + Tom Lane) Make months range from 1-12 in png_convert_to_rfc1123 -version 1.0.0b [March 13, 1998] + +Version 1.0.0b [March 13, 1998] Quieted compiler complaints about two empty "for" loops in pngrutil.c Minor changes to makefile.s2x Removed #ifdef/#endif around a png_free() in pngread.c -version 1.0.1 [March 14, 1998] +Version 1.0.1 [March 14, 1998] Changed makefile.s2x to reduce security risk of using a relative pathname Fixed some typos in the documentation (Greg). Fixed a problem with value of "channels" returned by png_read_update_info() -version 1.0.1a [April 21, 1998] + +Version 1.0.1a [April 21, 1998] Optimized Paeth calculations by replacing abs() function calls with intrinsics plus other loop optimizations. Improves avg decoding speed by about 20%. Commented out i386istic "align" compiler flags in makefile.lnx. @@ -327,19 +336,24 @@ version 1.0.1a [April 21, 1998] Moved a misplaced pngrutil code block that truncates tRNS if it has more than num_palette entries -- test was done before num_palette was defined. Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins). - Changed compiler flags in makefile.wat for better optimization (Pawel Mrochen). -version 1.0.1b [May 2, 1998] + Changed compiler flags in makefile.wat for better optimization + (Pawel Mrochen). + +Version 1.0.1b [May 2, 1998] Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg). Relocated the png_composite macros from pngrtran.c to png.h (Greg). Added makefile.sco (contributed by Mike Hopkirk). Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a. Fixed a bug in pngrtran.c that would set channels=5 under some circumstances. - More work on the Paeth-filtering, achieving imperceptible speedup (A Kleinert). - More work on loop optimization which may help when compiled with C++ compilers. + More work on the Paeth-filtering, achieving imperceptible speedup + (A Kleinert). + More work on loop optimization which may help when compiled with C++ + compilers. Added warnings when people try to use transforms they've defined out. Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran. Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg) -version 1.0.1c [May 11, 1998] + +Version 1.0.1c [May 11, 1998] Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for filler bytes should have been 0xff instead of 0xf. Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images. @@ -351,7 +365,8 @@ version 1.0.1c [May 11, 1998] to remove unwanted capabilities via the compile line Made some corrections to grammar (which, it's) in documentation (Greg). Corrected example.c, use of row_pointers in png_write_image(). -version 1.0.1d [May 24, 1998] + +Version 1.0.1d [May 24, 1998] Corrected several statements that used side effects illegally in pngrutil.c and pngtrans.c, that were introduced in version 1.0.1b Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert) @@ -361,7 +376,8 @@ version 1.0.1d [May 24, 1998] Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5 Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.) Changed several loops from count-down to count-up, for consistency. -version 1.0.1e [June 6, 1998] + +Version 1.0.1e [June 6, 1998] Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and added warnings when people try to set png_read_fn and png_write_fn in the same structure. @@ -378,9 +394,10 @@ version 1.0.1e [June 6, 1998] PNGTEST_DEBUG_MEM feature. Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner). -version 1.0.2 [June 14, 1998] +Version 1.0.2 [June 14, 1998] Fixed two bugs in makefile.bor . -version 1.0.2a [December 30, 1998] + +Version 1.0.2a [December 30, 1998] Replaced and extended code that was removed from png_set_filler() in 1.0.1a. Fixed a bug in png_do_filler() that made it fail to write filler bytes in the left-most pixel of each row (Kevin Bracey). @@ -402,21 +419,24 @@ version 1.0.2a [December 30, 1998] Added png_get_copyright() and png_get_header_version() functions. Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c Added information about debugging in libpng.txt and libpng.3 . - Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and makefile.sco. + Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and + makefile.sco. Removed lines after Dynamic Dependencies" in makefile.aco . Revised makefile.dec to make a shared library (Jeremie Petit). Removed trailing blanks from all files. -version 1.0.2a [January 6, 1999] + +Version 1.0.2a [January 6, 1999] Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h Added "if" tests to silence complaints about unused png_ptr in png.h and png.c Changed "check_if_png" function in example.c to return true (nonzero) if PNG. Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig() which is obsolete. -version 1.0.3 [January 14, 1999] +Version 1.0.3 [January 14, 1999] Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice) Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO. -version 1.0.3a [August 12, 1999] + +Version 1.0.3a [August 12, 1999] Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning if an attempt is made to read an interlaced image when it's not supported. Added check if png_ptr->trans is defined before freeing it in pngread.c @@ -443,13 +463,15 @@ version 1.0.3a [August 12, 1999] Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be consistent with PNG-1.2, and allow variance of 500 before complaining. Added assembler code contributed by Intel in file pngvcrd.c and modified - makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, Gilles Vollant) + makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, + Gilles Vollant) Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy. Added some aliases for png_set_expand() in pngrtran.c, namely png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS() (Greg Roelofs, in "PNG: The Definitive Guide"). Added makefile.beo for BEOS on X86, contributed by Sander Stok. -version 1.0.3b [August 26, 1999] + +Version 1.0.3b [August 26, 1999] Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h Changed leading blanks to tabs in all makefiles. Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code. @@ -461,12 +483,13 @@ version 1.0.3b [August 26, 1999] negative shift distance, whose results are undefined in the C language. Added a check in pngset.c to prevent writing multiple tIME chunks. Added a check in pngwrite.c to detect invalid small window_bits sizes. -version 1.0.3d [September 4, 1999] + +Version 1.0.3d [September 4, 1999] Fixed type casting of igamma in pngrutil.c Added new png_expand functions to scripts/pngdef.pas and pngos2.def Added a demo read_user_transform_fn that examines the row filters in pngtest.c -version 1.0.4 [September 24, 1999] +Version 1.0.4 [September 24, 1999] Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h Made several minor corrections to pngtest.c @@ -480,24 +503,30 @@ version 1.0.4 [September 24, 1999] assembler code) and makefile.vcwin32 (doesn't). Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING) Added a copy of pngnow.png to the distribution. -version 1.0.4a [September 25, 1999] + +Version 1.0.4a [September 25, 1999] Increase max_pixel_depth in pngrutil.c if a user transform needs it. Changed several division operations to right-shifts in pngvcrd.c -version 1.0.4b [September 30, 1999] + +Version 1.0.4b [September 30, 1999] Added parentheses in line 3732 of pngvcrd.c Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1 -version 1.0.4c [October 1, 1999] + +Version 1.0.4c [October 1, 1999] Added a "png_check_version" function in png.c and pngtest.c that will generate a helpful compiler error if an old png.h is found in the search path. Changed type of png_user_transform_depth|channels from int to png_byte. -version 1.0.4d [October 6, 1999] + +Version 1.0.4d [October 6, 1999] Changed 0.45 to 0.45455 in png_set_sRGB() Removed unused PLTE entries from pngnow.png Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly. -version 1.0.4e [October 10, 1999] + +Version 1.0.4e [October 10, 1999] Fixed sign error in pngvcrd.c (Greg Roelofs) Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P) -version 1.0.4f [October 15, 1999] + +Version 1.0.4f [October 15, 1999] Surrounded example.c code with #if 0 .. #endif to prevent people from inadvertently trying to compile it. Changed png_get_header_version() from a function to a macro in png.h @@ -505,9 +534,10 @@ version 1.0.4f [October 15, 1999] Removed some pointless "ptr = NULL" in pngmem.c Added a "contrib" directory containing the source code from Greg's book. -version 1.0.5 [October 15, 1999] +Version 1.0.5 [October 15, 1999] Minor editing of the INSTALL and README files. -version 1.0.5a [October 23, 1999] + +Version 1.0.5a [October 23, 1999] Added contrib/pngsuite and contrib/pngminus (Willem van Schaik) Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans) Further optimization and bugfix of pngvcrd.c @@ -515,14 +545,16 @@ version 1.0.5a [October 23, 1999] text_ptr structure. Instead, it makes its own copy. Created separate write_end_info_struct in pngtest.c for a more severe test. Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak. -version 1.0.5b [November 23, 1999] + +Version 1.0.5b [November 23, 1999] Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and PNG_FLAG_WROTE_tIME from flags to mode. Added png_write_info_before_PLTE() function. Fixed some typecasting in contrib/gregbook/*.c Updated scripts/makevms.com and added makevms.com to contrib/gregbook and contrib/pngminus (Martin Zinser) -version 1.0.5c [November 26, 1999] + +Version 1.0.5c [November 26, 1999] Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr. Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to accommodate making DLL's: Moved usr_png_ver from global variable to function @@ -535,7 +567,8 @@ version 1.0.5c [November 26, 1999] Removed some extraneous "-I" from contrib/pngminus/makefile.std Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2. Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3 -version 1.0.5d [November 29, 1999] + +Version 1.0.5d [November 29, 1999] Add type cast (png_const_charp) two places in png.c Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays. Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available @@ -543,7 +576,8 @@ version 1.0.5d [November 29, 1999] comment out (with #ifdef) all the new declarations when PNG_USE_GLOBAL_ARRAYS is defined. Added PNG_EXPORT_VAR macro to accommodate making DLL's. -version 1.0.5e [November 30, 1999] + +Version 1.0.5e [November 30, 1999] Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text structure; refactored the inflate/deflate support to make adding new chunks with trailing compressed parts easier in the future, and added new functions @@ -564,18 +598,21 @@ version 1.0.5e [November 30, 1999] PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED macros, leaving the separate macros also available. Removed comments on #endifs at the end of many short, non-nested #if-blocks. -version 1.0.5f [December 6, 1999] + +Version 1.0.5f [December 6, 1999] Changed makefile.solaris to issue a warning about potential problems when the ucb "ld" is in the path ahead of the ccs "ld". Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3. Added sCAL chunk support (Eric S. Raymond). -version 1.0.5g [December 7, 1999] + +Version 1.0.5g [December 7, 1999] Fixed "png_free_spallettes" typo in png.h Added code to handle new chunks in pngpread.c Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block Added "translated_key" to png_text structure and png_write_iTXt(). Added code in pngwrite.c to work around a newly discovered zlib bug. -version 1.0.5h [December 10, 1999] + +Version 1.0.5h [December 10, 1999] NOTE: regarding the note for version 1.0.5e, the following must also be included in your code: png_text[i].translated_key = NULL; @@ -583,7 +620,8 @@ version 1.0.5h [December 10, 1999] Option to eliminate all floating point support was added. Some new fixed-point functions such as png_set_gAMA_fixed() were added. Expanded tabs and removed trailing blanks in source files. -version 1.0.5i [December 13, 1999] + +Version 1.0.5i [December 13, 1999] Added some type casts to silence compiler warnings. Renamed "png_free_spalette" to "png_free_spalettes" for consistency. Removed leading blanks from a #define in pngvcrd.c @@ -595,7 +633,8 @@ version 1.0.5i [December 13, 1999] Added png_free_hIST() function. Various patches to fix bugs in the sCAL and integer cHRM processing, and to add some convenience macros for use with sCAL. -version 1.0.5j [December 21, 1999] + +Version 1.0.5j [December 21, 1999] Changed "unit" parameter of png_write_sCAL from png_byte to int, to work around buggy compilers. Added new type "png_fixed_point" for integers that hold float*100000 values @@ -611,7 +650,8 @@ version 1.0.5j [December 21, 1999] and to write the iTXt chunk after IDAT if it appears in the end_ptr. Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs) Reversed the order of trying to write floating-point and fixed-point gAMA. -version 1.0.5k [December 27, 1999] + +Version 1.0.5k [December 27, 1999] Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))" Added png_handle_as_unknown() function (Glenn) Added png_free_chunk_list() function and chunk_list and num_chunk_list members @@ -622,33 +662,41 @@ version 1.0.5k [December 27, 1999] Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR). Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is. Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP(). -version 1.0.5l [January 1, 2000] + +Version 1.0.5l [January 1, 2000] Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr() for setting a callback function to handle unknown chunks and for retrieving the associated user pointer (Glenn). -version 1.0.5m [January 7, 2000] + +Version 1.0.5m [January 7, 2000] Added high-level functions png_read_png(), png_write_png(), png_free_pixels(). -version 1.0.5n [January 9, 2000] + +Version 1.0.5n [January 9, 2000] Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its own memory for info_ptr->palette. This makes it safe for the calling application to free its copy of the palette any time after it calls png_set_PLTE(). -version 1.0.5o [January 20, 2000] + +Version 1.0.5o [January 20, 2000] Cosmetic changes only (removed some trailing blanks and TABs) -version 1.0.5p [January 31, 2000] + +Version 1.0.5p [January 31, 2000] Renamed pngdll.mak to makefile.bd32 Cosmetic changes in pngtest.c -version 1.0.5q [February 5, 2000] + +Version 1.0.5q [February 5, 2000] Relocated the makefile.solaris warning about PATH problems. Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg) Revised makefile.gcmmx Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros -version 1.0.5r [February 7, 2000] + +Version 1.0.5r [February 7, 2000] Removed superfluous prototype for png_get_itxt from png.h Fixed a bug in pngrtran.c that improperly expanded the background color. Return *num_text=0 from png_get_text() when appropriate, and fix documentation of png_get_text() in libpng.txt/libpng.3. -version 1.0.5s [February 18, 2000] + +Version 1.0.5s [February 18, 2000] Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the new error handler that's planned for the next libpng release, and changed example.c, pngtest.c, and contrib programs to use this macro. @@ -667,7 +715,8 @@ version 1.0.5s [February 18, 2000] Added png_set_rows() and png_get_rows(), for use with png_read|write_png(). Modified png_read_png() to allocate info_ptr->row_pointers only if it hasn't already been allocated. -version 1.0.5t [March 4, 2000] + +Version 1.0.5t [March 4, 2000] Changed png_jmp_env() migration aiding macro to png_jmpbuf(). Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when @@ -676,13 +725,15 @@ version 1.0.5t [March 4, 2000] a 24-bit visual if one is available, and to allow abbreviated options. Files in contrib/pngminus were revised to use the png_jmpbuf() macro. Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s -version 1.0.5u [March 5, 2000] + +Version 1.0.5u [March 5, 2000] Simplified the code that detects old png.h in png.c and pngtest.c Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp) Increased precision of rgb_to_gray calculations from 8 to 15 bits and added png_set_rgb_to_gray_fixed() function. Added makefile.bc32 (32-bit Borland C++, C mode) -version 1.0.5v [March 11, 2000] + +Version 1.0.5v [March 11, 2000] Added some parentheses to the png_jmpbuf macro definition. Updated references to the zlib home page, which has moved to freesoftware.com. Corrected bugs in documentation regarding png_read_row() and png_write_row(). @@ -690,10 +741,11 @@ version 1.0.5v [March 11, 2000] Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3, revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin) -version 1.0.6 [March 20, 2000] +Version 1.0.6 [March 20, 2000] Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c Added makefile.sggcc (SGI IRIX with gcc) -version 1.0.6d [April 7, 2000] + +Version 1.0.6d [April 7, 2000] Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO Added data_length parameter to png_decompress_chunk() function Revised documentation to remove reference to abandoned png_free_chnk functions @@ -702,7 +754,8 @@ version 1.0.6d [April 7, 2000] Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c Simplify png_sig_bytes() function to remove use of non-ISO-C strdup(). -version 1.0.6e [April 9, 2000] + +Version 1.0.6e [April 9, 2000] Added png_data_freer() function. In the code that checks for over-length tRNS chunks, added check of info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann) @@ -713,25 +766,29 @@ version 1.0.6e [April 9, 2000] is defined. Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c and mentioned the purposes of the two macros in libpng.txt/libpng.3. -version 1.0.6f [April 14, 2000] + +Version 1.0.6f [April 14, 2000] Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data. Add checks in png_set_text() for NULL members of the input text structure. Revised libpng.txt/libpng.3. - Removed superfluous prototype for png_set_itxt from png.h + Removed superfluous prototype for png_set_iTXt from png.h Removed "else" from pngread.c, after png_error(), and changed "0" to "length". Changed several png_errors about malformed ancillary chunks to png_warnings. -version 1.0.6g [April 24, 2000] + +Version 1.0.6g [April 24, 2000] Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined. Relocated paragraph about png_set_background() in libpng.3/libpng.txt and other revisions (Matthias Benckmann) Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and png_ptr members to restore binary compatibility with libpng-1.0.5 (breaks compatibility with libpng-1.0.6). -version 1.0.6h [April 24, 2000] + +Version 1.0.6h [April 24, 2000] Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h) This is a temporary change for test purposes. -version 1.0.6i [May 2, 2000] + +Version 1.0.6i [May 2, 2000] Rearranged some members at the end of png_info and png_struct, to put unknown_chunks_num and free_me within the original size of the png_structs and free_me, png_read_user_fn, and png_free_fn within the original png_info, @@ -756,11 +813,13 @@ version 1.0.6i [May 2, 2000] generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED was not defined. Added makefile.intel and updated makefile.watcom (Pawel Mrochen) -version 1.0.6j [May 3, 2000] + +Version 1.0.6j [May 3, 2000] Overloaded png_read_init() and png_write_init() with macros that convert calls to png_read_init_2() or png_write_init_2() that check the version and structure sizes. -version 1.0.7beta11 [May 7, 2000] + +Version 1.0.7beta11 [May 7, 2000] Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes which are no longer used. Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is @@ -771,7 +830,8 @@ version 1.0.7beta11 [May 7, 2000] Added PNGAPI macro, and added it to the definitions of all exported functions. Relocated version macro definitions ahead of the includes of zlib.h and pngconf.h in png.h. -version 1.0.7beta12 [May 12, 2000] + +Version 1.0.7beta12 [May 12, 2000] Revised pngset.c to avoid a problem with expanding the png_debug macro. Deleted some extraneous defines from pngconf.h Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined. @@ -779,7 +839,8 @@ version 1.0.7beta12 [May 12, 2000] Added png_access_version_number() function. Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data(). Expanded libpng.3/libpng.txt information about png_data_freer(). -version 1.0.7beta14 [May 17, 2000] (beta13 was not published) + +Version 1.0.7beta14 [May 17, 2000] (beta13 was not published) Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as warnings instead of errors, as pngrutil.c does. Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png() @@ -791,7 +852,8 @@ version 1.0.7beta14 [May 17, 2000] (beta13 was not published) Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5. Added png_set_invalid() function. Fixed incorrect illustrations of png_destroy_write_struct() in example.c. -version 1.0.7beta15 [May 30, 2000] + +Version 1.0.7beta15 [May 30, 2000] Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce fewer error messages. Rearranged checks for Z_OK to check the most likely path first in pngpread.c @@ -803,9 +865,11 @@ version 1.0.7beta15 [May 30, 2000] Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c Set each pointer to NULL after freeing it in png_free_data(). Worked around a problem in pngconf.h; AIX's strings.h defines an "index" - macro that conflicts with libpng's png_color_16.index. (Dimitri Papadapoulos) + macro that conflicts with libpng's png_color_16.index. (Dimitri + Papadapoulos) Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux). -version 1.0.7beta16 [June 4, 2000] + +Version 1.0.7beta16 [June 4, 2000] Revised the workaround of AIX string.h "index" bug. Added a check for overlength PLTE chunk in pngrutil.c. Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer @@ -815,23 +879,27 @@ version 1.0.7beta16 [June 4, 2000] Added PNG_USE_DLL macro. Revised the copyright/disclaimer/license notice. Added contrib/msvctest directory -version 1.0.7rc1 [June 9, 2000] + +Version 1.0.7rc1 [June 9, 2000] Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200) Added contrib/visupng directory (Willem van Schaik) -version 1.0.7beta18 [June 23, 2000] + +Version 1.0.7beta18 [June 23, 2000] Revised PNGAPI definition, and pngvcrd.c to work with __GCC__ and do not redefine PNGAPI if it is passed in via a compiler directive. Revised visupng/PngFile.c to remove returns from within the Try block. Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros. Updated contrib/visupng/cexcept.h to version 1.0.0. Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks. -version 1.0.7rc2 [June 28, 2000] + +Version 1.0.7rc2 [June 28, 2000] Updated license to include disclaimers required by UCITA. Fixed "DJBPP" typo in pnggccrd.c introduced in beta18. -version 1.0.7 [July 1, 2000] +Version 1.0.7 [July 1, 2000] Revised the definition of "trans_values" in libpng.3/libpng.txt -version 1.0.8beta1 [July 8, 2000] + +Version 1.0.8beta1 [July 8, 2000] Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks. Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and pngwutil.c. @@ -839,25 +907,30 @@ version 1.0.8beta1 [July 8, 2000] Removed unused "#include " from png.c Added WindowsCE support. Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment. -version 1.0.8beta2 [July 10, 2000] + +Version 1.0.8beta2 [July 10, 2000] Added project files to the wince directory and made further revisions of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE. -version 1.0.8beta3 [July 11, 2000] + +Version 1.0.8beta3 [July 11, 2000] Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS() for indexed-color input files to avoid potential double-freeing trans array under some unusual conditions; problem was introduced in version 1.0.6f. Further revisions to pngtest.c and files in the wince subdirectory. -version 1.0.8beta4 [July 14, 2000] + +Version 1.0.8beta4 [July 14, 2000] Added the files pngbar.png and pngbar.jpg to the distribution. Added makefile.cygwin, and cygwin support in pngconf.h Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory) -version 1.0.8rc1 [July 16, 2000] + +Version 1.0.8rc1 [July 16, 2000] Revised png_debug() macros and statements to eliminate compiler warnings. -version 1.0.8 [July 24, 2000] +Version 1.0.8 [July 24, 2000] Added png_flush() in pngwrite.c, after png_write_IEND(). Updated makefile.hpux to build a shared library. -version 1.0.9beta1 [November 10, 2000] + +Version 1.0.9beta1 [November 10, 2000] Fixed typo in scripts/makefile.hpux Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser) Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser) @@ -876,59 +949,72 @@ version 1.0.9beta1 [November 10, 2000] Revised makefile.cygwin Fixed bugs in iCCP support in pngrutil.c and pngwutil.c. Replaced png_set_empty_plte_permitted() with png_permit_mng_features(). -version 1.0.9beta2 [November 19, 2000] + +Version 1.0.9beta2 [November 19, 2000] Renamed the "dll" subdirectory "projects". Added borland project files to "projects" subdirectory. Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate. Add error message in png_set_compression_buffer_size() when malloc fails. -version 1.0.9beta3 [November 23, 2000] + +Version 1.0.9beta3 [November 23, 2000] Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project. Removed the png_flush() in pngwrite.c that crashes some applications that don't set png_output_flush_fn. Added makefile.macosx and makefile.aix to scripts directory. -version 1.0.9beta4 [December 1, 2000] + +Version 1.0.9beta4 [December 1, 2000] Change png_chunk_warning to png_warning in png_check_keyword(). Increased the first part of msg buffer from 16 to 18 in png_chunk_error(). -version 1.0.9beta5 [December 15, 2000] + +Version 1.0.9beta5 [December 15, 2000] Added support for filter method 64 (for PNG datastreams embedded in MNG). -version 1.0.9beta6 [December 18, 2000] + +Version 1.0.9beta6 [December 18, 2000] Revised png_set_filter() to accept filter method 64 when appropriate. Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to help prevent applications from using MNG features in PNG datastreams. Added png_permit_mng_features() function. Revised libpng.3/libpng.txt. Changed "filter type" to "filter method". -version 1.0.9rc1 [December 23, 2000] + +Version 1.0.9rc1 [December 23, 2000] Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c Fixed error handling of unknown compression type in png_decompress_chunk(). In pngconf.h, define __cdecl when _MSC_VER is defined. -version 1.0.9beta7 [December 28, 2000] + +Version 1.0.9beta7 [December 28, 2000] Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places. Revised memory management in png_set_hIST and png_handle_hIST in a backward compatible manner. PLTE and tRNS were revised similarly. Revised the iCCP chunk reader to ignore trailing garbage. -version 1.0.9beta8 [January 12, 2001] + +Version 1.0.9beta8 [January 12, 2001] Moved pngasmrd.h into pngconf.h. Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop. -version 1.0.9beta9 [January 15, 2001] + +Version 1.0.9beta9 [January 15, 2001] Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to wince and msvc project module definition files. Minor revision of makefile.cygwin. Fixed bug with progressive reading of narrow interlaced images in pngpread.c -version 1.0.9beta10 [January 16, 2001] + +Version 1.0.9beta10 [January 16, 2001] Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined. Fixed "png_mmx_supported" typo in project definition files. -version 1.0.9beta11 [January 19, 2001] + +Version 1.0.9beta11 [January 19, 2001] Updated makefile.sgi to make shared library. Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED by default, for the benefit of DLL forward compatibility. These will be re-enabled in version 1.2.0. -version 1.0.9rc2 [January 22, 2001] + +Version 1.0.9rc2 [January 22, 2001] Revised cygwin support. -version 1.0.9 [January 31, 2001] +Version 1.0.9 [January 31, 2001] Added check of cygwin's ALL_STATIC in pngconf.h Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos. -version 1.0.10beta1 [March 14, 2001] + +Version 1.0.10beta1 [March 14, 2001] Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc. Reformatted libpng.3 to eliminate bad line breaks. Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c @@ -941,33 +1027,39 @@ version 1.0.10beta1 [March 14, 2001] Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version) Added warnings when retrieving or setting gamma=0. Increased the first part of msg buffer from 16 to 18 in png_chunk_warning(). -version 1.0.10rc1 [March 23, 2001] + +Version 1.0.10rc1 [March 23, 2001] Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy, and png_strlen. Revised png_mmx_supported() function in pnggccrd.c to return proper value. Fixed bug in progressive reading (pngpread.c) with small images (height < 8). -version 1.0.10 [March 30, 2001] +Version 1.0.10 [March 30, 2001] Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin Added beos project files (Chris Herborth) -version 1.0.11beta1 [April 3, 2001] + +Version 1.0.11beta1 [April 3, 2001] Added type casts on several png_malloc() calls (Dimitri Papadapoulos). Removed a no-longer needed AIX work-around from pngconf.h Changed several "//" single-line comments to C-style in pnggccrd.c -version 1.0.11beta2 [April 11, 2001] + +Version 1.0.11beta2 [April 11, 2001] Removed PNGAPI from several functions whose prototypes did not have PNGAPI. Updated scripts/pngos2.def -version 1.0.11beta3 [April 14, 2001] + +Version 1.0.11beta3 [April 14, 2001] Added checking the results of many instances of png_malloc() for NULL -version 1.0.11beta4 [April 20, 2001] + +Version 1.0.11beta4 [April 20, 2001] Undid the changes from version 1.0.11beta3. Added a check for NULL return from user's malloc_fn(). Removed some useless type casts of the NULL pointer. Added makefile.netbsd -version 1.0.11 [April 27, 2001] +Version 1.0.11 [April 27, 2001] Revised makefile.netbsd -version 1.0.12beta1 [May 14, 2001] + +Version 1.0.12beta1 [May 14, 2001] Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot) Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings. @@ -975,21 +1067,25 @@ version 1.0.12beta1 [May 14, 2001] libpng will reallocate the png_struct and info_struct if they are too small. This retains future binary compatibility for old applications written for libpng-0.88 and earlier. -version 1.2.0beta1 [May 6, 2001] + +Version 1.2.0beta1 [May 6, 2001] Bumped DLLNUM to 2. Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED by default. Added runtime selection of MMX features. Added png_set_strip_error_numbers function and related macros. -version 1.2.0beta2 [May 7, 2001] + +Version 1.2.0beta2 [May 7, 2001] Finished merging 1.2.0beta1 with version 1.0.11 Added a check for attempts to read or write PLTE in grayscale PNG datastreams. -version 1.2.0beta3 [May 17, 2001] + +Version 1.2.0beta3 [May 17, 2001] Enabled user memory function by default. Modified png_create_struct so it passes user mem_ptr to user memory allocator. Increased png_mng_features flag from png_byte to png_uint_32. Bumped shared-library (so-number) and dll-number to 3. -version 1.2.0beta4 [June 23, 2001] + +Version 1.2.0beta4 [June 23, 2001] Check for missing profile length field in iCCP chunk and free chunk_data in case of truncated iCCP chunk. Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc @@ -1003,7 +1099,8 @@ version 1.2.0beta4 [June 23, 2001] of png_write_oFFS width and height from png_uint_32 to png_int_32. Updated example.c Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c -version 1.2.0beta5 [August 8, 2001] + +Version 1.2.0beta5 [August 8, 2001] Revised contrib/gregbook Revised makefile.gcmmx Revised pnggccrd.c to conditionally compile some thread-unsafe code only @@ -1014,27 +1111,32 @@ version 1.2.0beta5 [August 8, 2001] Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c Removed restriction that do_invert_mono only operate on 1-bit opaque files -version 1.2.0 [September 1, 2001] +Version 1.2.0 [September 1, 2001] Changed a png_warning() to png_debug() in pnggccrd.c Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC(). -version 1.2.1beta1 [October 19, 2001] + +Version 1.2.1beta1 [October 19, 2001] Revised makefile.std in contrib/pngminus Include background_1 in png_struct regardless of gamma support. Revised makefile.netbsd and makefile.macosx, added makefile.darwin. Revised example.c to provide more details about using row_callback(). -version 1.2.1beta2 [October 25, 2001] + +Version 1.2.1beta2 [October 25, 2001] Added type cast to each NULL appearing in a function call, except for WINCE functions. Added makefile.so9. -version 1.2.1beta3 [October 27, 2001] + +Version 1.2.1beta3 [October 27, 2001] Removed type casts from all NULLs. Simplified png_create_struct_2(). -version 1.2.1beta4 [November 7, 2001] + +Version 1.2.1beta4 [November 7, 2001] Revised png_create_info_struct() and png_creat_struct_2(). Added error message if png_write_info() was omitted. Type cast NULLs appearing in function calls when _NO_PROTO or PNG_TYPECAST_NULL is defined. -version 1.2.1rc1 [November 24, 2001] + +Version 1.2.1rc1 [November 24, 2001] Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL is defined. Changed typecast of "size" argument to png_size_t in pngmem.c calls to @@ -1043,14 +1145,16 @@ version 1.2.1rc1 [November 24, 2001] Updated makefile.sgi to recognize LIBPATH and INCPATH. Updated various makefiles so "make clean" does not remove previous major version of the shared library. -version 1.2.1rc2 [December 4, 2001] + +Version 1.2.1rc2 [December 4, 2001] Always allocate 256-entry internal palette, hist, and trans arrays, to avoid out-of-bounds memory reference caused by invalid PNG datastreams. Added a check for prefix_length > data_length in iCCP chunk handler. -version 1.2.1 [December 7, 2001] +Version 1.2.1 [December 7, 2001] None. -version 1.2.2beta1 [February 22, 2002] + +Version 1.2.2beta1 [February 22, 2002] Fixed a bug with reading the length of iCCP profiles (Larry Reeves). Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h @@ -1060,13 +1164,15 @@ version 1.2.2beta1 [February 22, 2002] Revised calls to png_create_read_struct() and png_create_write_struct() for simpler debugging. Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK) -version 1.2.2beta2 [February 23, 2002] + +Version 1.2.2beta2 [February 23, 2002] Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths. Check for invalid image dimensions in png_get_IHDR. Added missing "fi;" in the install target of the SGI makefiles. Added install-static to all makefiles that make shared libraries. Always do gamma compensation when image is partially transparent. -version 1.2.2beta3 [March 7, 2002] + +Version 1.2.2beta3 [March 7, 2002] Compute background.gray and background_1.gray even when color_type is RGB in case image gets reduced to gray later. Modified shared-library makefiles to install pkgconfig/libpngNN.pc. @@ -1076,12 +1182,14 @@ version 1.2.2beta3 [March 7, 2002] Added install-shared target to all makefiles that make shared libraries. Stopped a double free of palette, hist, and trans when not using free_me. Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64. -version 1.2.2beta4 [March 8, 2002] + +Version 1.2.2beta4 [March 8, 2002] Compute background.gray and background_1.gray even when color_type is RGB in case image gets reduced to gray later (Jason Summers). Relocated a misplaced /bin/rm in the "install-shared" makefile targets Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library. -version 1.2.2beta5 [March 26, 2002] + +Version 1.2.2beta5 [March 26, 2002] Added missing PNGAPI to several function definitions. Check for invalid bit_depth or color_type in png_get_IHDR(), and check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen). @@ -1090,33 +1198,45 @@ version 1.2.2beta5 [March 26, 2002] Changed "()" to "{}" in scripts/libpng.pc.in. Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so -version 1.2.2beta6 [March 31, 2002] -version 1.0.13beta1 [March 31, 2002] + +Version 1.2.2beta6 [March 31, 2002] + +Version 1.0.13beta1 [March 31, 2002] Prevent png_zalloc() from trying to memset memory that it failed to acquire. Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate). Ensure that the right function (user or default) is used to free the png_struct after an error in png_create_read_struct_2(). -version 1.2.2rc1 [April 7, 2002] -version 1.0.13rc1 [April 7, 2002] + +Version 1.2.2rc1 [April 7, 2002] + +Version 1.0.13rc1 [April 7, 2002] Save the ebx register in pnggccrd.c (Sami Farin) Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner). Updated makefiles to put headers in include/libpng and remove old include/*.h. -version 1.2.2 [April 15, 2002] -version 1.0.13 [April 15, 2002] +Version 1.2.2 [April 15, 2002] + +Version 1.0.13 [April 15, 2002] Revised description of png_set_filter() in libpng.3/libpng.txt. Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd -version 1.0.13patch01 [April 17, 2002] -version 1.2.2patch01 [April 17, 2002] - Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and makefile.sggcc - Fixed VER -> PNGVER typo in makefile.macosx and added install-static to install + +Version 1.0.13patch01 [April 17, 2002] + +Version 1.2.2patch01 [April 17, 2002] + Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and + makefile.sggcc + Fixed VER -> PNGVER typo in makefile.macosx and added install-static to + install Added install: target to makefile.32sunu and makefile.64sunu -version 1.0.13patch03 [April 18, 2002] -version 1.2.2patch03 [April 18, 2002] + +Version 1.0.13patch03 [April 18, 2002] + +Version 1.2.2patch03 [April 18, 2002] Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng subdirectory to libpngNN subdirectory without the full pathname. Moved generation of libpng.pc from "install" to "all" in 15 makefiles. -version 1.2.3rc1 [April 28, 2002] + +Version 1.2.3rc1 [April 28, 2002] Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos). Added $(DESTDIR) feature to 24 makefiles (Tim Mooney) Fixed bug with $prefix, should be $(prefix) in makefile.hpux. @@ -1128,70 +1248,83 @@ version 1.2.3rc1 [April 28, 2002] to put one in their application. Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and removed them from module definition files. -version 1.2.3rc2 [May 1, 2002] + +Version 1.2.3rc2 [May 1, 2002] Fixed bug in reporting number of channels in pngget.c and pngset.c, that was introduced in version 1.2.2beta5. Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(), png_default_flush(), and png_push_fill_buffer() and included them in module definition files. Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles. -version 1.2.3rc3 [May 1, 2002] + +Version 1.2.3rc3 [May 1, 2002] Revised prototype for png_default_flush() Remove old libpng.pc and libpngNN.pc before installing new ones. -version 1.2.3rc4 [May 2, 2002] + +Version 1.2.3rc4 [May 2, 2002] Typos in *.def files (png_default_read|write -> png_default_read|write_data) In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc - Added libpng-config and libpngNN-config and modified makefiles to install them. + Added libpng-config and libpngNN-config and modified makefiles to install + them. Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp -version 1.2.3rc5 [May 11, 2002] + +Version 1.2.3rc5 [May 11, 2002] Changed "error" and "message" in prototypes to "error_message" and "warning_message" to avoid namespace conflict. Revised 15 makefiles to build libpng-config from libpng-config-*.in Once more restored png_zalloc and png_zfree to regular nonexported form. Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer - to nonexported form, but with PNGAPI, and removed them from module def files. -version 1.2.3rc6 [May 14, 2002] + to nonexported form, but with PNGAPI, and removed them from module def + files. + +Version 1.2.3rc6 [May 14, 2002] Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp. Removed leftover libpng-config "sed" script from four makefiles. Revised libpng-config creating script in 16 makefiles. -version 1.2.3 [May 22, 2002] +Version 1.2.3 [May 22, 2002] Revised libpng-config target in makefile.cygwin. Removed description of png_set_mem_fn() from documentation. Revised makefile.freebsd. Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR). Revised projects/msvc/README.txt Changed -lpng to -lpngNN in LDFLAGS in several makefiles. -version 1.2.4beta1 [May 24, 2002] + +Version 1.2.4beta1 [May 24, 2002] Added libpng.pc and libpng-config to "all:" target in 16 makefiles. Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH) Added missing "\" before closing double quote in makefile.gcmmx. Plugged various memory leaks; added png_malloc_warn() and png_set_text_2() functions. -version 1.2.4beta2 [June 25, 2002] + +Version 1.2.4beta2 [June 25, 2002] Plugged memory leak of png_ptr->current_text (Matt Holgate). Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison) Added -soname to the loader flags in makefile.dec, makefile.sgi, and makefile.sggcc. Added "test-installed" target to makefile.linux, makefile.gcmmx, makefile.sgi, and makefile.sggcc. -version 1.2.4beta3 [June 28, 2002] + +Version 1.2.4beta3 [June 28, 2002] Plugged memory leak of row_buf in pngtest.c when there is a png_error(). Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data. Added "test-installed" target to makefile.32sunu, makefile.64sunu, makefile.beos, makefile.darwin, makefile.dec, makefile.macosx, makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9. -version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002] + +Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002] Added "test-installed" target to makefile.cygwin and makefile.sco. Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro. -version 1.2.4 and 1.0.14 [July 8, 2002] +Version 1.2.4 and 1.0.14 [July 8, 2002] Changed png_warning() to png_error() when width is too large to process. -version 1.2.4patch01 [July 20, 2002] + +Version 1.2.4patch01 [July 20, 2002] Revised makefile.cygwin to use DLL number 12 instead of 13. -version 1.2.5beta1 [August 6, 2002] + +Version 1.2.5beta1 [August 6, 2002] Added code to contrib/gregbook/readpng2.c to ignore unused chunks. Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11) Removed some stray *.o files from contrib/gregbook. @@ -1200,36 +1333,43 @@ version 1.2.5beta1 [August 6, 2002] Prevent png_ptr->pass from exceeding 7 in png_push_finish_row(). Updated makefile.hpgcc Updated png.c and pnggccrd.c handling of return from png_mmx_support() -version 1.2.5beta2 [August 15, 2002] + +Version 1.2.5beta2 [August 15, 2002] Only issue png_warning() about "Too much data" in pngpread.c when avail_in is nonzero. Updated makefiles to install a separate libpng.so.3 with its own rpath. -version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002] + +Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002] Revised makefiles to not remove previous minor versions of shared libraries. -version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002] + +Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002] Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared library loader directive. Added missing "$OBJSDLL" line to makefile.gcmmx. Added missing "; fi" to makefile.32sunu. -version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002] + +Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002] Revised libpng-config script. -version 1.2.5 and 1.0.15 [October 3, 2002] +Version 1.2.5 and 1.0.15 [October 3, 2002] Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux, and makefile.aix. Relocated two misplaced PNGAPI lines in pngtest.c -version 1.2.6beta1 [October 22, 2002] + +Version 1.2.6beta1 [October 22, 2002] Commented out warning about uninitialized mmx_support in pnggccrd.c. Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h. Relocated two more misplaced PNGAPI lines in pngtest.c Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams, introduced in version 1.0.2. Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu. -version 1.2.6beta2 [November 1, 2002] + +Version 1.2.6beta2 [November 1, 2002] Added libpng-config "--ldopts" output. Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)" in makefiles. -version 1.2.6beta3 [July 18, 2004] + +Version 1.2.6beta3 [July 18, 2004] Reverted makefile changes from version 1.2.6beta2 and some of the changes from version 1.2.6beta1; these will be postponed until version 1.2.7. Version 1.2.6 is going to be a simple bugfix release. @@ -1282,7 +1422,8 @@ version 1.2.6beta3 [July 18, 2004] Updated contrib/visupng/VisualPng.dsp (Cosmin). Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin). Added a separate distribution with "configure" and supporting files (Junichi). -version 1.2.6beta4 [July 28, 2004] + +Version 1.2.6beta4 [July 28, 2004] Added user ability to change png_size_t via a PNG_SIZE_T macro. Added png_sizeof() and png_convert_size() functions. Added PNG_SIZE_MAX (maximum value of a png_size_t variable. @@ -1304,7 +1445,8 @@ version 1.2.6beta4 [July 28, 2004] Added some "#if PNG_WRITE_SUPPORTED" blocks. Added #ifdef to remove some redundancy in png_malloc_default(). Use png_malloc instead of png_zalloc to allocate the pallete. -version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004] + +Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004] Fixed buffer overflow vulnerability in png_handle_tRNS() Fixed integer arithmetic overflow vulnerability in png_read_png(). Fixed some harmless bugs in png_handle_sBIT, etc, that would cause @@ -1319,7 +1461,8 @@ version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004] Fixed wrong cast of returns from png_get_user_width|height_max(). Changed some "keep the compiler happy" from empty statements to returns, Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution -version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004] + +Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004] Revised makefile.darwin and makefile.solaris. Removed makefile.macosx. Revised pngtest's png_debug_malloc() to use png_malloc() instead of png_malloc_default() which is not supposed to be exported. @@ -1333,91 +1476,106 @@ version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004] Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin) Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles. Added code to update the row_info->colortype in png_do_read_filler() (MSB). -version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004] + +Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004] Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro. Revised documentation of png_set_keep_unknown_chunks(). Check handle_as_unknown status in pngpread.c, as in pngread.c previously. Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c -version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004] + +Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004] Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of "pinfo" was out of place). -version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004] + +Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004] Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED section of png.h where they were inadvertently placed in version rc3. -version 1.2.6 and 1.0.16 [August 15, 2004] +Version 1.2.6 and 1.0.16 [August 15, 2004] Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1. -version 1.2.7beta1 [August 26, 2004] + +Version 1.2.7beta1 [August 26, 2004] Removed unused pngasmrd.h file. Removed references to uu.net for archived files. Added references to PNG Spec (second edition) and the PNG ISO/IEC Standard. Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR. Fixed bug with "optimized window size" in the IDAT datastream, that causes libpng to write PNG files with incorrect zlib header bytes. -version 1.2.7beta2 [August 28, 2004] + +Version 1.2.7beta2 [August 28, 2004] Fixed bug with sCAL chunk and big-endian machines (David Munro). Undid new code added in 1.2.6rc2 to update the color_type in png_set_filler(). Added png_set_add_alpha() that updates color type. -version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004] + +Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004] Revised png_set_strip_filler() to not remove alpha if color_type has alpha. -version 1.2.7 and 1.0.17 [September 12, 2004] +Version 1.2.7 and 1.0.17 [September 12, 2004] Added makefile.hp64 Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin -version 1.2.8beta1 [November 1, 2004] + +Version 1.2.8beta1 [November 1, 2004] Fixed bug in png_text_compress() that would fail to complete a large block. Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during strip alpha operation in png_do_strip_filler(). Added PNG_1_2_X definition in pngconf.h Use #ifdef to comment out png_info_init in png.c and png_read_init in pngread.c (as of 1.3.0) -version 1.2.8beta2 [November 2, 2004] + +Version 1.2.8beta2 [November 2, 2004] Reduce color_type to a nonalpha type after strip alpha operation in png_do_strip_filler(). -version 1.2.8beta3 [November 3, 2004] + +Version 1.2.8beta3 [November 3, 2004] Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM -version 1.2.8beta4 [November 12, 2004] + +Version 1.2.8beta4 [November 12, 2004] Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin). Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin). Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection of data type in deflate (Cosmin). Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING. -version 1.2.8beta5 [November 20, 2004] + +Version 1.2.8beta5 [November 20, 2004] Use png_ptr->flags instead of png_ptr->transformations to pass PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI compatibility. Revised handling of SPECIALBUILD, PRIVATEBUILD, PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING. -version 1.2.8rc1 [November 24, 2004] + +Version 1.2.8rc1 [November 24, 2004] Moved handling of BUILD macros from pngconf.h to png.h Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently omitted from beta5. Revised scripts/pngw32.rc Despammed mailing addresses by masking "@" with "at". Inadvertently installed a supposedly faster test version of pngrutil.c -version 1.2.8rc2 [November 26, 2004] + +Version 1.2.8rc2 [November 26, 2004] Added two missing "\" in png.h Change tests in pngread.c and pngpread.c to if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA)) png_do_read_transformations(png_ptr); -version 1.2.8rc3 [November 28, 2004] + +Version 1.2.8rc3 [November 28, 2004] Reverted pngrutil.c to version libpng-1.2.8beta5. Added scripts/makefile.elf with supporting code in pngconf.h for symbol versioning (John Bowler). -version 1.2.8rc4 [November 29, 2004] + +Version 1.2.8rc4 [November 29, 2004] Added projects/visualc7 (Simon-pierre). -version 1.2.8rc5 [November 29, 2004] + +Version 1.2.8rc5 [November 29, 2004] Fixed new typo in scripts/pngw32.rc -version 1.2.8 [December 3, 2004] +Version 1.2.8 [December 3, 2004] Removed projects/visualc7, added projects/visualc71. -version 1.2.9beta1 [February 21, 2006] - +Version 1.2.9beta1 [February 21, 2006] Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints Revised man page and libpng.txt to make it clear that one should not call png_read_end or png_write_end after png_read_png or png_write_png. @@ -1439,8 +1597,7 @@ version 1.2.9beta1 [February 21, 2006] Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin). Default iTXt support was inadvertently enabled. -version 1.2.9beta2 [February 21, 2006] - +Version 1.2.9beta2 [February 21, 2006] Check for png_rgb_to_gray and png_gray_to_rgb read transformations before checking for png_read_dither in pngrtran.c Revised checking of chromaticity limits to accommodate extended RGB @@ -1453,8 +1610,7 @@ version 1.2.9beta2 [February 21, 2006] Eliminated distributions without the "configure" script. Updated INSTALL instructions. -version 1.2.9beta3 [February 24, 2006] - +Version 1.2.9beta3 [February 24, 2006] Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler) Removed reference to pngasmrd.h from Makefile.am @@ -1463,8 +1619,7 @@ version 1.2.9beta3 [February 24, 2006] Renamed ANNOUNCE to NEWS. Created AUTHORS file. -version 1.2.9beta4 [March 3, 2006] - +Version 1.2.9beta4 [March 3, 2006] Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING. Removed newline from the end of some error and warning messages. @@ -1475,17 +1630,17 @@ version 1.2.9beta4 [March 3, 2006] Added "OS2" to list of systems that don't need underscores, in pnggccrd.c Removed libpng version and date from *.c files. -version 1.2.9beta5 [March 4, 2006] +Version 1.2.9beta5 [March 4, 2006] Removed trailing blanks from source files. Put version and date of latest change in each source file, and changed copyright year accordingly. - More cleanup of configure.ac, Makefile.ac, and associated scripts. + More cleanup of configure.ac, Makefile.am, and associated scripts. Restored scripts/makefile.elf which was inadvertently deleted. -version 1.2.9beta6 [March 6, 2006] +Version 1.2.9beta6 [March 6, 2006] Fixed typo (RELEASE) in configuration files. -version 1.2.9beta7 [March 7, 2006] +Version 1.2.9beta7 [March 7, 2006] Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s() in png.h. @@ -1493,7 +1648,7 @@ version 1.2.9beta7 [March 7, 2006] Made cosmetic changes to some makefiles, adding LN_SF and other macros. Made some makefiles accept "exec_prefix". -version 1.2.9beta8 [March 9, 2006] +Version 1.2.9beta8 [March 9, 2006] Fixed some "#if defined (..." which should be "#if defined(..." Bug introduced in libpng-1.2.8. Fixed inconsistency in definition of png_default_read_data() @@ -1504,82 +1659,82 @@ version 1.2.9beta8 [March 9, 2006] Added png_set_expand_gray_1_2_4_to_8() and deprecated png_set_gray_1_2_4_to_8() which also expands tRNS to alpha. -version 1.2.9beta9 [March 10, 2006] +Version 1.2.9beta9 [March 10, 2006] Include "config.h" in pngconf.h when available. Added some checks for NULL png_ptr or NULL info_ptr (timeless) -version 1.2.9beta10 [March 20, 2006] +Version 1.2.9beta10 [March 20, 2006] Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin) Made pnggccrd.c PIC-compliant (Christian Aichinger). Added makefile.mingw (Wolfgang Glas). Revised pngconf.h MMX checking. -version 1.2.9beta11 [March 22, 2006] +Version 1.2.9beta11 [March 22, 2006] Fixed out-of-order declaration in pngwrite.c that was introduced in beta9 Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros. -version 1.2.9rc1 [March 31, 2006] +Version 1.2.9rc1 [March 31, 2006] Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin). Removed nonsensical assertion check from pngtest.c (Cosmin). -version 1.2.9 [April 14, 2006] +Version 1.2.9 [April 14, 2006] Revised makefile.beos and added "none" selector in ltmain.sh -version 1.2.10beta1 [April 15, 2006] +Version 1.2.10beta1 [April 15, 2006] Renamed "config.h" to "png_conf.h" and revised Makefile.am to add -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h to include png_conf.h only when PNG_BUILDING_LIBPNG is defined. -version 1.2.10beta2 [April 15, 2006] +Version 1.2.10beta2 [April 15, 2006] Manually updated Makefile.in and configure. Changed png_conf.h.in back to config.h. -version 1.2.10beta3 [April 15, 2006] +Version 1.2.10beta3 [April 15, 2006] Change png_conf.h back to config.h in pngconf.h. -version 1.2.10beta4 [April 16, 2006] +Version 1.2.10beta4 [April 16, 2006] Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*. -version 1.2.10beta5 [April 16, 2006] +Version 1.2.10beta5 [April 16, 2006] Added a configure check for compiling assembler code in pnggccrd.c -version 1.2.10beta6 [April 17, 2006] +Version 1.2.10beta6 [April 17, 2006] Revised the configure check for pnggccrd.c Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@ Added @LIBPNG_DEFINES@ to arguments when building libpng.sym -version 1.2.10beta7 [April 18, 2006] +Version 1.2.10beta7 [April 18, 2006] Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles. -version 1.2.10rc1 [April 19, 2006] +Version 1.2.10rc1 [April 19, 2006] Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD Fixed "LN_FS" typo in makefile.sco and makefile.solaris. -version 1.2.10rc2 [April 20, 2006] +Version 1.2.10rc2 [April 20, 2006] Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE in configure.ac and configure Made the configure warning about versioned symbols less arrogant. -version 1.2.10rc3 [April 21, 2006] +Version 1.2.10rc3 [April 21, 2006] Added a note in libpng.txt that png_set_sig_bytes(8) can be used when writing an embedded PNG without the 8-byte signature. Revised makefiles and configure to avoid making links to libpng.so.* -version 1.2.10 [April 23, 2006] +Version 1.2.10 [April 23, 2006] Reverted configure to "rc2" state. -version 1.2.11beta1 [May 31, 2006] +Version 1.2.11beta1 [May 31, 2006] scripts/libpng.pc.in contained "configure" style version info and would not work with makefiles. The shared-library makefiles were linking to libpng.so.0 instead of libpng.so.3 compatibility as the library. -version 1.2.11beta2 [June 2, 2006] +Version 1.2.11beta2 [June 2, 2006] Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid buffer overflow. Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb) -version 1.2.11beta3 [June 5, 2006] +Version 1.2.11beta3 [June 5, 2006] Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin). Removed the accidental leftover Makefile.in~ (Cosmin). Avoided potential buffer overflow and optimized buffer in @@ -1587,116 +1742,116 @@ version 1.2.11beta3 [June 5, 2006] Removed the include directories and libraries from CFLAGS and LDFLAGS in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin). -version 1.2.11beta4 [June 6, 2006] +Version 1.2.11beta4 [June 6, 2006] Allow zero-length IDAT chunks after the entire zlib datastream, but not after another intervening chunk type. -version 1.0.19rc1, 1.2.11rc1 [June 13, 2006] +Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006] Deleted extraneous square brackets from [config.h] in configure.ac -version 1.0.19rc2, 1.2.11rc2 [June 14, 2006] +Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006] Added prototypes for PNG_INCH_CONVERSIONS functions to png.h Revised INSTALL and autogen.sh Fixed typo in several makefiles (-W1 should be -Wl) Added typedef for png_int_32 and png_uint_32 on 64-bit systems. -version 1.0.19rc3, 1.2.11rc3 [June 15, 2006] +Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006] Removed the new typedefs for 64-bit systems (delay until version 1.4.0) Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid reading out of bounds. -version 1.0.19rc4, 1.2.11rc4 [June 15, 2006] +Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006] Really removed the new typedefs for 64-bit systems. -version 1.0.19rc5, 1.2.11rc5 [June 22, 2006] +Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006] Removed png_sig_bytes entry from scripts/pngw32.def -version 1.0.19, 1.2.11 [June 26, 2006] +Version 1.0.19, 1.2.11 [June 26, 2006] None. -version 1.0.20, 1.2.12 [June 27, 2006] +Version 1.0.20, 1.2.12 [June 27, 2006] Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid buffer overflow. -version 1.2.13beta1 [October 2, 2006] +Version 1.2.13beta1 [October 2, 2006] Removed AC_FUNC_MALLOC from configure.ac Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h Change "logical" to "bitwise" throughout documentation. - Detect and fix attempt to write wrong iCCP profile length. + Detect and fix attempt to write wrong iCCP profile length (CVE-2006-7244) -version 1.0.21, 1.2.13 [November 14, 2006] +Version 1.0.21, 1.2.13 [November 14, 2006] Fix potential buffer overflow in sPLT chunk handler. Fix Makefile.am to not try to link to noexistent files. Check all exported functions for NULL png_ptr. -version 1.2.14beta1 [November 17, 2006] +Version 1.2.14beta1 [November 17, 2006] Relocated three misplaced tests for NULL png_ptr. Built Makefile.in with automake-1.9.6 instead of 1.9.2. Build configure with autoconf-2.60 instead of 2.59 -version 1.2.14beta2 [November 17, 2006] +Version 1.2.14beta2 [November 17, 2006] Added some typecasts in png_zalloc(). -version 1.2.14rc1 [November 20, 2006] +Version 1.2.14rc1 [November 20, 2006] Changed "strtod" to "png_strtod" in pngrutil.c -version 1.0.22, 1.2.14 [November 27, 2006] +Version 1.0.22, 1.2.14 [November 27, 2006] Added missing "$(srcdir)" in Makefile.am and Makefile.in -version 1.2.15beta1 [December 3, 2006] +Version 1.2.15beta1 [December 3, 2006] Generated configure with autoconf-2.61 instead of 2.60 Revised configure.ac to update libpng.pc and libpng-config. -version 1.2.15beta2 [December 3, 2006] +Version 1.2.15beta2 [December 3, 2006] Always export MMX asm functions, just stubs if not building pnggccrd.c -version 1.2.15beta3 [December 4, 2006] +Version 1.2.15beta3 [December 4, 2006] Add "png_bytep" typecast to profile while calculating length in pngwutil.c -version 1.2.15beta4 [December 7, 2006] +Version 1.2.15beta4 [December 7, 2006] Added scripts/CMakeLists.txt Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta -version 1.2.15beta5 [December 7, 2006] +Version 1.2.15beta5 [December 7, 2006] Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c Revised scripts/CMakeLists.txt -version 1.2.15beta6 [December 13, 2006] +Version 1.2.15beta6 [December 13, 2006] Revised scripts/CMakeLists.txt and configure.ac -version 1.2.15rc1 [December 18, 2006] +Version 1.2.15rc1 [December 18, 2006] Revised scripts/CMakeLists.txt -version 1.2.15rc2 [December 21, 2006] +Version 1.2.15rc2 [December 21, 2006] Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers. Added scripts/makefile.nommx -version 1.2.15rc3 [December 25, 2006] +Version 1.2.15rc3 [December 25, 2006] Fixed shared library numbering error that was introduced in 1.2.15beta6. -version 1.2.15rc4 [December 27, 2006] +Version 1.2.15rc4 [December 27, 2006] Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set. -version 1.2.15rc5 [December 31, 2006] +Version 1.2.15rc5 [December 31, 2006] Revised handling of rgb_to_gray. -version 1.2.15 [January 5, 2007] +Version 1.2.15 [January 5, 2007] Added some (unsigned long) typecasts in pngtest.c to avoid printing errors. -version 1.2.16beta1 [January 6, 2007] +Version 1.2.16beta1 [January 6, 2007] Fix bugs in makefile.nommx -version 1.2.16beta2 [January 16, 2007] +Version 1.2.16beta2 [January 16, 2007] Revised scripts/CMakeLists.txt -version 1.2.16 [January 31, 2007] +Version 1.2.16 [January 31, 2007] No changes. -version 1.2.17beta1 [March 6, 2007] +Version 1.2.17beta1 [March 6, 2007] Revised scripts/CMakeLists.txt to install both shared and static libraries. Deleted a redundant line from pngset.c. -version 1.2.17beta2 [April 26, 2007] +Version 1.2.17beta2 [April 26, 2007] Relocated misplaced test for png_ptr == NULL in pngpread.c Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN flags. @@ -1705,10 +1860,10 @@ version 1.2.17beta2 [April 26, 2007] Added "const" to some array declarations. Mention examples of libpng usage in the libpng*.txt and libpng.3 documents. -version 1.2.17rc1 [May 4, 2007] +Version 1.2.17rc1 [May 4, 2007] No changes. -version 1.2.17rc2 [May 8, 2007] +Version 1.2.17rc2 [May 8, 2007] Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications calling set_unknown_chunk_location() need them. Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in @@ -1717,64 +1872,64 @@ version 1.2.17rc2 [May 8, 2007] can be free'ed in case of error. Revised unknown chunk handling in pngrutil.c and pngpread.c to use this structure. -version 1.2.17rc3 [May 8, 2007] +Version 1.2.17rc3 [May 8, 2007] Revised symbol-handling in configure script. -version 1.2.17rc4 [May 10, 2007] +Version 1.2.17rc4 [May 10, 2007] Revised unknown chunk handling to avoid storing unknown critical chunks. -version 1.0.25 [May 15, 2007] -version 1.2.17 [May 15, 2007] +Version 1.0.25 [May 15, 2007] +Version 1.2.17 [May 15, 2007] Added "png_ptr->num_trans=0" before error return in png_handle_tRNS, to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664) -version 1.0.26 [May 15, 2007] -version 1.2.18 [May 15, 2007] +Version 1.0.26 [May 15, 2007] +Version 1.2.18 [May 15, 2007] Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script -version 1.2.19beta1 [May 18, 2007] +Version 1.2.19beta1 [May 18, 2007] Changed "const static" to "static PNG_CONST" everywhere, mostly undoing change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST" Changed some handling of unused parameters, to avoid compiler warnings. "if (unused == NULL) return;" becomes "unused = unused". -version 1.2.19beta2 [May 18, 2007] +Version 1.2.19beta2 [May 18, 2007] Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier) -version 1.2.19beta3 [May 19, 2007] +Version 1.2.19beta3 [May 19, 2007] Add some "png_byte" typecasts in png_check_keyword() and write new_key instead of key in zTXt chunk (Kevin Ryde). -version 1.2.19beta4 [May 21, 2007] +Version 1.2.19beta4 [May 21, 2007] Add png_snprintf() function and use it in place of sprint() for improved defense against buffer overflows. -version 1.2.19beta5 [May 21, 2007] +Version 1.2.19beta5 [May 21, 2007] Fixed png_handle_tRNS() to only use the valid bits of tRNS value. Changed handling of more unused parameters, to avoid compiler warnings. Removed some PNG_CONST in pngwutil.c to avoid compiler warnings. -version 1.2.19beta6 [May 22, 2007] +Version 1.2.19beta6 [May 22, 2007] Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c Added a special "_MSC_VER" case that defines png_snprintf to _snprintf -version 1.2.19beta7 [May 22, 2007] +Version 1.2.19beta7 [May 22, 2007] Squelched png_squelch_warnings() in pnggccrd.c and added an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused the warnings that png_squelch_warnings was squelching. -version 1.2.19beta8 [May 22, 2007] +Version 1.2.19beta8 [May 22, 2007] Removed __MMX__ from test in pngconf.h. -version 1.2.19beta9 [May 23, 2007] +Version 1.2.19beta9 [May 23, 2007] Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro. Revised png_squelch_warnings() so it might work. Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86. -version 1.2.19beta10 [May 24, 2007] +Version 1.2.19beta10 [May 24, 2007] Resquelched png_squelch_warnings(), use "__attribute__((used))" instead. -version 1.4.0beta1 [April 20, 2006] +Version 1.4.0beta1 [April 20, 2006] Enabled iTXt support (changes png_struct, thus requires so-number change). Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED Eliminated PNG_1_0_X and PNG_1_2_X macros. @@ -1786,12 +1941,12 @@ version 1.4.0beta1 [April 20, 2006] Reduced dependency on C-runtime library when on Windows (Simon-Pierre) Replaced sprintf() with png_sprintf() (Simon-Pierre) -version 1.4.0beta2 [April 20, 2006] +Version 1.4.0beta2 [April 20, 2006] Revised makefiles and configure to avoid making links to libpng.so.* Moved some leftover MMX-related defines from pngconf.h to pngintrn.h Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def -version 1.4.0beta3 [May 10, 2006] +Version 1.4.0beta3 [May 10, 2006] Updated scripts/pngw32.def to comment out MMX functions. Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros. Scripts/libpng.pc.in contained "configure" style version info and would @@ -1799,21 +1954,21 @@ version 1.4.0beta3 [May 10, 2006] Revised pngconf.h and added pngconf.h.in, so makefiles and configure can pass defines to libpng and applications. -version 1.4.0beta4 [May 11, 2006] +Version 1.4.0beta4 [May 11, 2006] Revised configure.ac, Makefile.am, and many of the makefiles to write their defines in pngconf.h. -version 1.4.0beta5 [May 15, 2006] +Version 1.4.0beta5 [May 15, 2006] Added a missing semicolon in Makefile.am and Makefile.in Deleted extraneous square brackets from configure.ac -version 1.4.0beta6 [June 2, 2006] +Version 1.4.0beta6 [June 2, 2006] Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid buffer overflow. Changed sonum from 0 to 1. Removed unused prototype for png_check_sig() from png.h -version 1.4.0beta7 [June 16, 2006] +Version 1.4.0beta7 [June 16, 2006] Exported png_write_sig (Cosmin). Optimized buffer in png_handle_cHRM() (Cosmin). Set pHYs = 2835 x 2835 pixels per meter, and added @@ -1822,11 +1977,11 @@ version 1.4.0beta7 [June 16, 2006] Added typedef for png_int_32 and png_uint_32 on 64-bit systems. Added "(unsigned long)" typecast on png_uint_32 variables in printf lists. -version 1.4.0beta8 [June 22, 2006] +Version 1.4.0beta8 [June 22, 2006] Added demonstration of user chunk support in pngtest.c, to support the public sTER chunk and a private vpAg chunk. -version 1.4.0beta9 [July 3, 2006] +Version 1.4.0beta9 [July 3, 2006] Removed ordinals from scripts/pngw32.def and removed png_info_int and png_set_gray_1_2_4_to_8 entries. Inline call of png_get_uint_32() in png_get_uint_31(). @@ -1834,14 +1989,14 @@ version 1.4.0beta9 [July 3, 2006] Removed WINCE and Netware projects. Removed standalone Y2KINFO file. -version 1.4.0beta10 [July 12, 2006] +Version 1.4.0beta10 [July 12, 2006] Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and some makefiles, because it was not working reliably. Instead, distribute pngconf.h.in along with pngconf.h and cause configure and some of the makefiles to update pngconf.h from pngconf.h.in. Added pngconf.h to DEPENDENCIES in Makefile.am -version 1.4.0beta11 [August 19, 2006] +Version 1.4.0beta11 [August 19, 2006] Removed AC_FUNC_MALLOC from configure.ac. Added a warning when writing iCCP profile with mismatched profile length. Patched pnggccrd.c to assemble on x86_64 platforms. @@ -1886,41 +2041,41 @@ version 1.4.0beta11 [August 19, 2006] pngconf.h.in (Glenn). Detect and fix attempt to write wrong iCCP profile length. -version 1.4.0beta12 [October 19, 2006] +Version 1.4.0beta12 [October 19, 2006] Changed "logical" to "bitwise" in the documentation. Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h Add a typecast to stifle compiler warning in pngrutil.c -version 1.4.0beta13 [November 10, 2006] +Version 1.4.0beta13 [November 10, 2006] Fix potential buffer overflow in sPLT chunk handler. Fix Makefile.am to not try to link to noexistent files. -version 1.4.0beta14 [November 15, 2006] +Version 1.4.0beta14 [November 15, 2006] Check all exported functions for NULL png_ptr. -version 1.4.0beta15 [November 17, 2006] +Version 1.4.0beta15 [November 17, 2006] Relocated two misplaced tests for NULL png_ptr. Built Makefile.in with automake-1.9.6 instead of 1.9.2. Build configure with autoconf-2.60 instead of 2.59 Add "install: all" in Makefile.am so "configure; make install" will work. -version 1.4.0beta16 [November 17, 2006] +Version 1.4.0beta16 [November 17, 2006] Added a typecast in png_zalloc(). -version 1.4.0beta17 [December 4, 2006] +Version 1.4.0beta17 [December 4, 2006] Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c Add "png_bytep" typecast to profile while calculating length in pngwutil.c -version 1.4.0beta18 [December 7, 2006] +Version 1.4.0beta18 [December 7, 2006] Added scripts/CMakeLists.txt -version 1.4.0beta19 [May 16, 2007] +Version 1.4.0beta19 [May 16, 2007] Revised scripts/CMakeLists.txt Rebuilt configure and Makefile.in with newer tools. Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers. Added scripts/makefile.nommx -version 1.4.0beta20 [July 9, 2008] +Version 1.4.0beta20 [July 9, 2008] Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications calling set_unknown_chunk_location() need them. Moved several macro definitions from pngpriv.h to pngconf.h @@ -1928,19 +2083,19 @@ version 1.4.0beta20 [July 9, 2008] Deleted all use of the MMX assembler code and Intel-licensed optimizations. Revised makefile.mingw -version 1.4.0beta21 [July 21, 2008] +Version 1.4.0beta21 [July 21, 2008] Moved local array "chunkdata" from pngrutil.c to the png_struct, so it will be freed by png_read_destroy() in case of a read error (Kurt Christensen). -version 1.4.0beta22 [July 21, 2008] +Version 1.4.0beta22 [July 21, 2008] Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking. -version 1.4.0beta23 [July 22, 2008] +Version 1.4.0beta23 [July 22, 2008] Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in png_decompress_chunk(). -version 1.4.0beta24 [July 25, 2008] +Version 1.4.0beta24 [July 25, 2008] Change all remaining "chunkdata" to "png_ptr->chunkdata" in png_decompress_chunk(), and remove "chunkdata" from parameter list. Put a call to png_check_chunk_name() in png_read_chunk_header(). @@ -1948,7 +2103,7 @@ version 1.4.0beta24 [July 25, 2008] Removed two calls to png_check_chunk_name() occuring later in the process. Define PNG_NO_ERROR_NUMBERS by default in pngconf.h -version 1.4.0beta25 [July 30, 2008] +Version 1.4.0beta25 [July 30, 2008] Added a call to png_check_chunk_name() in pngpread.c Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte. Added png_push_have_buffer() function to pngpread.c @@ -1959,7 +2114,7 @@ version 1.4.0beta25 [July 30, 2008] Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles) Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c -version 1.4.0beta26 [August 4, 2008] +Version 1.4.0beta26 [August 4, 2008] Removed png_push_have_buffer() function in pngpread.c. It increased the compiled library size slightly. Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta) @@ -1967,105 +2122,105 @@ version 1.4.0beta26 [August 4, 2008] Updated contrib/visupng/cexcept.h to version 2.0.1 Added PNG_LITERAL_CHARACTER macros for #, [, and ]. -version 1.4.0beta27 [August 5, 2008] +Version 1.4.0beta27 [August 5, 2008] Revised usage of PNG_LITERAL_SHARP in pngerror.c. Moved newline character from individual png_debug messages into the png_debug macros. Allow user to #define their own png_debug, png_debug1, and png_debug2. -version 1.4.0beta28 [August 5, 2008] +Version 1.4.0beta28 [August 5, 2008] Revised usage of PNG_LITERAL_SHARP in pngerror.c. Added PNG_STRING_NEWLINE macro -version 1.4.0beta29 [August 9, 2008] +Version 1.4.0beta29 [August 9, 2008] Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers. Added PNG_STRING_COPYRIGHT macro. Added non-ISO versions of png_debug macros. -version 1.4.0beta30 [August 14, 2008] +Version 1.4.0beta30 [August 14, 2008] Added premultiplied alpha feature (Volker Wiendl). -version 1.4.0beta31 [August 18, 2008] +Version 1.4.0beta31 [August 18, 2008] Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c Removed extra crc check at the end of png_handle_cHRM(). Bug introduced in libpng-1.4.0beta20. -version 1.4.0beta32 [August 19, 2008] +Version 1.4.0beta32 [August 19, 2008] Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call. Revised PNG_NO_STDIO version of png_write_flush() -version 1.4.0beta33 [August 20, 2008] +Version 1.4.0beta33 [August 20, 2008] Added png_get|set_chunk_cache_max() to limit the total number of sPLT, text, and unknown chunks that can be stored. -version 1.4.0beta34 [September 6, 2008] +Version 1.4.0beta34 [September 6, 2008] Shortened tIME_string to 29 bytes in pngtest.c Fixed off-by-one error introduced in png_push_read_zTXt() function in libpng-1.2.30beta04/pngpread.c (Harald van Dijk) -version 1.4.0beta35 [October 6, 2008] +Version 1.4.0beta35 [October 6, 2008] Changed "trans_values" to "trans_color". Changed so-number from 0 to 14. Some OS do not like 0. Revised makefile.darwin to fix shared library numbering. Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8() in example.c (debian bug report) -version 1.4.0beta36 [October 25, 2008] +Version 1.4.0beta36 [October 25, 2008] Sync with tEXt vulnerability fix in libpng-1.2.33rc02. -version 1.4.0beta37 [November 13, 2008] +Version 1.4.0beta37 [November 13, 2008] Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c, and pngwrite.c -version 1.4.0beta38 [November 22, 2008] +Version 1.4.0beta38 [November 22, 2008] Added check for zero-area RGB cHRM triangle in png_check_cHRM() and png_check_cHRM_fixed(). -version 1.4.0beta39 [November 23, 2008] +Version 1.4.0beta39 [November 23, 2008] Revised png_warning() to write its message on standard output by default when warning_fn is NULL. -version 1.4.0beta40 [November 24, 2008] +Version 1.4.0beta40 [November 24, 2008] Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed(). In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant check for all-zero coordinates that is detected by the triangle check. -version 1.4.0beta41 [November 26, 2008] +Version 1.4.0beta41 [November 26, 2008] Fixed string vs pointer-to-string error in png_check_keyword(). Rearranged test expressions in png_check_cHRM_fixed() to avoid internal overflows. Added PNG_NO_CHECK_cHRM conditional. -version 1.4.0beta42, 43 [December 1, 2008] +Version 1.4.0beta42, 43 [December 1, 2008] Merge png_debug with version 1.2.34beta04. -version 1.4.0beta44 [December 6, 2008] +Version 1.4.0beta44 [December 6, 2008] Removed redundant check for key==NULL before calling png_check_keyword() to ensure that new_key gets initialized and removed extra warning (Merge with version 1.2.34beta05 -- Arvan Pritchard). -version 1.4.0beta45 [December 9, 2008] +Version 1.4.0beta45 [December 9, 2008] In png_write_png(), respect the placement of the filler bytes in an earlier call to png_set_filler() (Jim Barry). -version 1.4.0beta46 [December 10, 2008] +Version 1.4.0beta46 [December 10, 2008] Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated PNG_TRANSFORM_STRIP_FILLER (Jim Barry). -version 1.4.0beta47 [December 15, 2008] +Version 1.4.0beta47 [December 15, 2008] Support for dithering was disabled by default, because it has never been well tested and doesn't work very well. The code has not been removed, however, and can be enabled by building libpng with PNG_READ_DITHER_SUPPORTED defined. -version 1.4.0beta48 [February 14, 2009] +Version 1.4.0beta48 [February 14, 2009] Added new exported function png_calloc(). Combined several instances of png_malloc(); png_memset() into png_calloc(). Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24 but was never defined. -version 1.4.0beta49 [February 28, 2009] +Version 1.4.0beta49 [February 28, 2009] Added png_fileno() macro to pngconf.h, used in pngwio.c Corrected order of #ifdef's in png_debug definition in png.h Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments @@ -2074,7 +2229,7 @@ version 1.4.0beta49 [February 28, 2009] (bug introduced in libpng-1.2.34/1.4.0beta29). Revised comments in png_set_read_fn() and png_set_write_fn(). -version 1.4.0beta50 [March 18, 2009] +Version 1.4.0beta50 [March 18, 2009] Use png_calloc() instead of png_malloc() to allocate big_row_buf when reading an interlaced file, to avoid a possible UMR. Undid revision of PNG_NO_STDIO version of png_write_flush(). Users @@ -2085,21 +2240,21 @@ version 1.4.0beta50 [March 18, 2009] Removed fflush() from pngtest.c. Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h -version 1.4.0beta51 [March 21, 2009] +Version 1.4.0beta51 [March 21, 2009] Removed new png_fileno() macro from pngconf.h . -version 1.4.0beta52 [March 27, 2009] +Version 1.4.0beta52 [March 27, 2009] Relocated png_do_chop() ahead of building gamma tables in pngrtran.c This avoids building 16-bit gamma tables unnecessarily. Removed fflush() from pngtest.c. Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt -version 1.4.0beta53 [April 1, 2009] +Version 1.4.0beta53 [April 1, 2009] Removed some remaining MMX macros from pngpriv.h Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles) -version 1.4.0beta54 [April 13, 2009] +Version 1.4.0beta54 [April 13, 2009] Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow application code writers to bypass the check for multiple inclusion of setjmp.h when they know that it is safe to ignore the situation. @@ -2108,54 +2263,54 @@ version 1.4.0beta54 [April 13, 2009] pngtest now produces, and made some cosmetic changes to pngtest output. Eliminated deprecated png_read_init_3() and png_write_init_3() functions. -version 1.4.0beta55 [April 15, 2009] +Version 1.4.0beta55 [April 15, 2009] Simplified error handling in pngread.c and pngwrite.c by putting the new png_read_cleanup() and png_write_cleanup() functions inline. -version 1.4.0beta56 [April 25, 2009] +Version 1.4.0beta56 [April 25, 2009] Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress "shadowed declaration" warning from gcc-4.3.3. Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration" warning about a global "gamma" variable in math.h on some platforms. -version 1.4.0beta57 [May 2, 2009] +Version 1.4.0beta57 [May 2, 2009] Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24 but was never defined (again). Rebuilt configure scripts with autoconf-2.63 instead of 2.62 Removed pngprefs.h and MMX from makefiles -version 1.4.0beta58 [May 14, 2009] +Version 1.4.0beta58 [May 14, 2009] Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced in beta57). Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri) -version 1.4.0beta59 [May 15, 2009] +Version 1.4.0beta59 [May 15, 2009] Reformated sources in libpng style (3-space intentation, comment format) Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG) Added sections about the git repository and our coding style to the documentation Relocated misplaced #endif in pngwrite.c, sCAL chunk handler. -version 1.4.0beta60 [May 19, 2009] +Version 1.4.0beta60 [May 19, 2009] Conditionally compile png_read_finish_row() which is not used by progressive readers. Added contrib/pngminim/preader to demonstrate building minimal progressive decoder, based on contrib/gregbook with embedded libpng and zlib. -version 1.4.0beta61 [May 20, 2009] +Version 1.4.0beta61 [May 20, 2009] In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there is only one makefile in those directories, and revised the README files accordingly. More reformatting of comments, mostly to capitalize sentences. -version 1.4.0beta62 [June 2, 2009] +Version 1.4.0beta62 [June 2, 2009] Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h Reformatted several remaining "else statement" into two lines. Added a section to the libpng documentation about using png_get_io_ptr() in configure scripts to detect the presence of libpng. -version 1.4.0beta63 [June 15, 2009] +Version 1.4.0beta63 [June 15, 2009] Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR() multiple times and to specify the sample order in the tRNS chunk, because the ISO PNG specification has a typo in the tRNS table. @@ -2165,26 +2320,26 @@ version 1.4.0beta63 [June 15, 2009] Adopted preference for consistent use of "#ifdef" and "#ifndef" versus "#if defined()" and "if !defined()" where possible. -version 1.4.0beta64 [June 24, 2009] +Version 1.4.0beta64 [June 24, 2009] Eliminated PNG_LEGACY_SUPPORTED code. Moved the various unknown chunk macro definitions outside of the PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks. -version 1.4.0beta65 [June 26, 2009] +Version 1.4.0beta65 [June 26, 2009] Added a reference to the libpng license in each file. -version 1.4.0beta66 [June 27, 2009] +Version 1.4.0beta66 [June 27, 2009] Refer to the libpng license instead of the libpng license in each file. -version 1.4.0beta67 [July 6, 2009] +Version 1.4.0beta67 [July 6, 2009] Relocated INVERT_ALPHA within png_read_png() and png_write_png(). Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB. Added an "xcode" project to the projects directory (Alam Arias). -version 1.4.0beta68 [July 19, 2009] +Version 1.4.0beta68 [July 19, 2009] Avoid some tests in filter selection in pngwutil.c -version 1.4.0beta69 [July 25, 2009] +Version 1.4.0beta69 [July 25, 2009] Simplified the new filter-selection test. This runs faster in the common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases. Removed extraneous declaration from the new call to png_read_gray_to_rgb() @@ -2192,54 +2347,54 @@ version 1.4.0beta69 [July 25, 2009] Fixed up xcode project (Alam Arias) Added a prototype for png_64bit_product() in png.c -version 1.4.0beta70 [July 27, 2009] +Version 1.4.0beta70 [July 27, 2009] Avoid a possible NULL dereference in debug build, in png_set_text_2(). (bug introduced in libpng-0.95, discovered by Evan Rouault) -version 1.4.0beta71 [July 29, 2009] +Version 1.4.0beta71 [July 29, 2009] Rebuilt configure scripts with autoconf-2.64. -version 1.4.0beta72 [August 1, 2009] +Version 1.4.0beta72 [August 1, 2009] Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec from . -version 1.4.0beta73 [August 1, 2009] +Version 1.4.0beta73 [August 1, 2009] Reject attempt to write iCCP chunk with negative embedded profile length - (JD Chen) + (JD Chen) (CVE-2009-5063). -version 1.4.0beta74 [August 8, 2009] +Version 1.4.0beta74 [August 8, 2009] Changed png_ptr and info_ptr member "trans" to "trans_alpha". -version 1.4.0beta75 [August 21, 2009] +Version 1.4.0beta75 [August 21, 2009] Removed an extra png_debug() recently added to png_write_find_filter(). Fixed incorrect #ifdef in pngset.c regarding unknown chunk support. -version 1.4.0beta76 [August 22, 2009] +Version 1.4.0beta76 [August 22, 2009] Moved an incorrectly located test in png_read_row() in pngread.c -version 1.4.0beta77 [August 27, 2009] +Version 1.4.0beta77 [August 27, 2009] Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt, and the "noconfig" files from the distribution. Moved CMakeLists.txt from scripts into the main libpng directory. Various bugfixes and improvements to CMakeLists.txt (Philip Lowman) -version 1.4.0beta78 [August 31, 2009] +Version 1.4.0beta78 [August 31, 2009] Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros. Use png_malloc plus a loop instead of png_calloc() to initialize row_pointers in png_read_png(). -version 1.4.0beta79 [September 1, 2009] +Version 1.4.0beta79 [September 1, 2009] Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays. Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc(). -version 1.4.0beta80 [September 17, 2009] +Version 1.4.0beta80 [September 17, 2009] Removed scripts/libpng.icc Changed typecast of filler from png_byte to png_uint_16 in png_set_filler(). (Dennis Gustafsson) Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ") -version 1.4.0beta81 [September 23, 2009] +Version 1.4.0beta81 [September 23, 2009] Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h Expanded TAB characters in pngrtran.c Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid @@ -2247,60 +2402,60 @@ version 1.4.0beta81 [September 23, 2009] Changed all "#if [!]defined(X)" to "if[n]def X" where possible. Eliminated unused png_ptr->row_buf_size -version 1.4.0beta82 [September 25, 2009] +Version 1.4.0beta82 [September 25, 2009] Moved redundant IHDR checking into new png_check_IHDR() in png.c and report all errors found in the IHDR data. Eliminated useless call to png_check_cHRM() from pngset.c -version 1.4.0beta83 [September 25, 2009] +Version 1.4.0beta83 [September 25, 2009] Revised png_check_IHDR() to eliminate bogus complaint about filter_type. -version 1.4.0beta84 [September 30, 2009] +Version 1.4.0beta84 [September 30, 2009] Fixed some inconsistent indentation in pngconf.h Revised png_check_IHDR() to add a test for width variable less than 32-bit. -version 1.4.0beta85 [October 1, 2009] +Version 1.4.0beta85 [October 1, 2009] Revised png_check_IHDR() again, to check info_ptr members instead of the contents of the returned parameters. -version 1.4.0beta86 [October 9, 2009] +Version 1.4.0beta86 [October 9, 2009] Updated the "xcode" project (Alam Arias). Eliminated a shadowed declaration of "pp" in png_handle_sPLT(). -version 1.4.0rc01 [October 19, 2009] +Version 1.4.0rc01 [October 19, 2009] Trivial cosmetic changes. -version 1.4.0beta87 [October 30, 2009] +Version 1.4.0beta87 [October 30, 2009] Moved version 1.4.0 back into beta. -version 1.4.0beta88 [October 30, 2009] +Version 1.4.0beta88 [October 30, 2009] Revised libpng*.txt section about differences between 1.2.x and 1.4.0 because most of the new features have now been ported back to 1.2.41 -version 1.4.0beta89 [November 1, 2009] +Version 1.4.0beta89 [November 1, 2009] More bugfixes and improvements to CMakeLists.txt (Philip Lowman) Removed a harmless extra png_set_invert_alpha() from pngwrite.c Apply png_user_chunk_cache_max within png_decompress_chunk(). Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate. -version 1.4.0beta90 [November 2, 2009] +Version 1.4.0beta90 [November 2, 2009] Removed all remaining WIN32_WCE #ifdefs except those involving the time.h "tm" structure -version 1.4.0beta91 [November 3, 2009] +Version 1.4.0beta91 [November 3, 2009] Updated scripts/pngw32.def and projects/wince/png32ce.def Copied projects/wince/png32ce.def to the scripts directory. Added scripts/makefile.wce Patched ltmain.sh for wince support. Added PNG_CONVERT_tIME_SUPPORTED macro. -version 1.4.0beta92 [November 4, 2009] +Version 1.4.0beta92 [November 4, 2009] Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead of differences from 1.2.41 to 1.4.0) -version 1.4.0beta93 [November 7, 2009] +Version 1.4.0beta93 [November 7, 2009] Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and PNG_ALLOCATED macros to detect deprecated direct access to the png_struct or info_struct members and other deprecated usage in @@ -2323,13 +2478,13 @@ version 1.4.0beta93 [November 7, 2009] Moved the synopsis lines for png_read_destroy(), png_write_destroy() png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3. -version 1.4.0beta94 [November 9, 2009] +Version 1.4.0beta94 [November 9, 2009] Removed the obsolete, unused pnggccrd.c and pngvcrd.c files. Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions. Removed dependency of pngtest.o on pngpriv.h in the makefiles. Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined. -version 1.4.0beta95 [November 10, 2009] +Version 1.4.0beta95 [November 10, 2009] Changed png_check_sig() to !png_sig_cmp() in contrib programs. Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile Changed png_check_sig() to !png_sig_cmp() in contrib programs. @@ -2337,7 +2492,7 @@ version 1.4.0beta95 [November 10, 2009] Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c Added dependency on pngpriv.h in contrib/pngminim/*/makefile -version 1.4.0beta96 [November 12, 2009] +Version 1.4.0beta96 [November 12, 2009] Renamed scripts/makefile.wce to scripts/makefile.cegcc Revised Makefile.am to use libpng.sys while building libpng.so so that only PNG_EXPORT functions are exported. @@ -2347,42 +2502,42 @@ version 1.4.0beta96 [November 12, 2009] (evidently the same change made in libpng-1.0beta54 was lost). Added PNG_PRIVATE macro definition in pngconf.h for possible future use. -version 1.4.0beta97 [November 13, 2009] +Version 1.4.0beta97 [November 13, 2009] Restored pngtest.png to the libpng-1.4.0beta7 version. Removed projects/beos and netware.txt; no one seems to be supporting them. Revised Makefile.in -version 1.4.0beta98 [November 13, 2009] +Version 1.4.0beta98 [November 13, 2009] Added the "xcode" project to zip distributions, Fixed a typo in scripts/pngwin.def introduced in beta97. -version 1.4.0beta99 [November 14, 2009] +Version 1.4.0beta99 [November 14, 2009] Moved libpng-config.in and libpng.pc-configure.in out of the scripts directory, to libpng-config.in and libpng-pc.in, respectively, and modified Makefile.am and configure.ac accordingly. Now "configure" needs nothing from the "scripts" directory. Avoid redefining PNG_CONST in pngconf.h -version 1.4.0beta100 [November 14, 2009] +Version 1.4.0beta100 [November 14, 2009] Removed ASM builds from projects/visualc6 and projects/visualc71 Removed scripts/makefile.nommx and makefile.vcawin32 Revised CMakeLists.txt to account for new location of libpng-config.in and libpng-pc.in Updated INSTALL to reflect removal and relocation of files. -version 1.4.0beta101 [November 14, 2009] +Version 1.4.0beta101 [November 14, 2009] Restored the binary files (*.jpg, *.png, some project files) that were accidentally deleted from the zip and 7z distributions when the xcode project was added. -version 1.4.0beta102 [November 18, 2009] +Version 1.4.0beta102 [November 18, 2009] Added libpng-config.in and libpng-pc.in to the zip and 7z distributions. Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100. Moved descriptions of makefiles and other scripts out of INSTALL into scripts/README.txt Updated the copyright year in scripts/pngwin.rc from 2006 to 2009. -version 1.4.0beta103 [November 21, 2009] +Version 1.4.0beta103 [November 21, 2009] Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt Align row_buf on 16-byte boundary in memory. Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call @@ -2394,74 +2549,74 @@ version 1.4.0beta103 [November 21, 2009] jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'. (John Bowler) -version 1.4.0beta104 [November 22, 2009] +Version 1.4.0beta104 [November 22, 2009] Removed png_longjmp_ptr from scripts/*.def and libpng.3 Rebuilt configure scripts with autoconf-2.65 -version 1.4.0beta105 [November 25, 2009] +Version 1.4.0beta105 [November 25, 2009] Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535() to accomplish alpha premultiplication when PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined. Changed "/255" to "/255.0" in background calculations to make it clear that the 255 is used as a double. -version 1.4.0beta106 [November 27, 2009] +Version 1.4.0beta106 [November 27, 2009] Removed premultiplied alpha feature. -version 1.4.0beta107 [December 4, 2009] +Version 1.4.0beta107 [December 4, 2009] Updated README Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files. Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects. Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco to put png.h and pngconf.h in $prefix/include, like the other scripts, instead of in $prefix/include/libpng. Also revised makefile.sco - to put them in $prefix/include/libpng14 instead of in - $prefix/include/libpng/libpng14. + to put them in $prefix/include/libpng15 instead of in + $prefix/include/libpng/libpng15. -version 1.4.0beta108 [December 11, 2009] +Version 1.4.0beta108 [December 11, 2009] Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile Relocated png_do_chop() to its original position in pngrtran.c; the change in version 1.2.41beta08 caused transparency to be handled wrong in some 16-bit datastreams (Yusaku Sugai). -version 1.4.0beta109 [December 13, 2009] +Version 1.4.0beta109 [December 13, 2009] Added "bit_depth" parameter to the private png_build_gamma_table() function. Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit tables. -version 1.4.0rc02 [December 20, 2009] +Version 1.4.0rc02 [December 20, 2009] Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c -version 1.4.0rc03 [December 22, 2009] +Version 1.4.0rc03 [December 22, 2009] Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt (revising the change in 1.4.0beta99) -version 1.4.0rc04 [December 25, 2009] +Version 1.4.0rc04 [December 25, 2009] Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngset.c to be consistent with other changes in version 1.2.38. -version 1.4.0rc05 [December 25, 2009] +Version 1.4.0rc05 [December 25, 2009] Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and Makefile.in to be consistent with changes in libpng-1.4.0rc03 -version 1.4.0rc06 [December 29, 2009] +Version 1.4.0rc06 [December 29, 2009] Reverted the gamma_table changes from libpng-1.4.0beta109. Fixed some indentation errors. -version 1.4.0rc07 [January 1, 2010] +Version 1.4.0rc07 [January 1, 2010] Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences. Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c Update copyright year to 2010. -version 1.4.0rc08 [January 2, 2010] +Version 1.4.0rc08 [January 2, 2010] Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr in pngtest.c -version 1.4.0 [January 3, 2010] +Version 1.4.0 [January 3, 2010] No changes. -version 1.4.1beta01 [January 8, 2010] +Version 1.4.1beta01 [January 8, 2010] Updated CMakeLists.txt for consistent indentation and to avoid an unclosed if-statement warning (Philip Lowman). Revised Makefile.am and Makefile.in to remove references to Y2KINFO, @@ -2473,28 +2628,28 @@ version 1.4.1beta01 [January 8, 2010] Revised Makefile.am and Makefile.in to simplify their maintenance. Revised scripts/makefile.linux to install a link to libpng14.so.14.1 -version 1.4.1beta02 [January 9, 2010] +Version 1.4.1beta02 [January 9, 2010] Revised the rest of the makefiles to install a link to libpng14.so.14.1 -version 1.4.1beta03 [January 10, 2010] +Version 1.4.1beta03 [January 10, 2010] Removed png_set_premultiply_alpha() from scripts/*.def -version 1.4.1rc01 [January 16, 2010] +Version 1.4.1rc01 [January 16, 2010] No changes. -version 1.4.1beta04 [January 23, 2010] +Version 1.4.1beta04 [January 23, 2010] Revised png_decompress_chunk() to improve speed and memory usage when decoding large chunks. Added png_set|get_chunk_malloc_max() functions. -version 1.4.1beta05 [January 26, 2010] +Version 1.4.1beta05 [January 26, 2010] Relocated "int k" declaration in pngtest.c to minimize its scope. -version 1.4.1beta06 [January 28, 2010] +Version 1.4.1beta06 [January 28, 2010] Revised png_decompress_chunk() to use a two-pass method suggested by John Bowler. -version 1.4.1beta07 [February 6, 2010] +Version 1.4.1beta07 [February 6, 2010] Folded some long lines in the source files. Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX, and a PNG_USER_LIMITS_SUPPORTED flag. @@ -2502,188 +2657,1023 @@ version 1.4.1beta07 [February 6, 2010] png_ptr->png_user_chunk_malloc_max. Revised png_push_save_buffer() to do fewer but larger png_malloc() calls. -version 1.4.1beta08 [February 6, 2010] +Version 1.4.1beta08 [February 6, 2010] Minor cleanup and updating of dates and copyright year. -version 1.4.1beta09 [February 7, 2010] +Version 1.5.0beta01 [February 7, 2010] + Moved declaration of png_struct into private pngstruct.h and png_info + into pnginfo.h + +Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010] Reverted to original png_push_save_buffer() code. -version 1.4.1beta10 [February 9, 2010] - Return allocated "old_buffer" in png_push_save_buffer() before calling - png_error(), to avoid a potential memory leak. +Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010] + Return allocated "old_buffer" in png_push_save_buffer() before + calling png_error(), to avoid a potential memory leak. + Updated configure script to use SO number 15. + +Version 1.5.0beta04 [February 9, 2010] + Removed malformed "incomplete struct declaration" of png_info from png.h -version 1.4.1beta11 [February 12, 2010] - Relocated misplaced closing curley bracket in png_decompress_chunk(). - Removed unused "buffer_size" variable from png_decompress_chunk(). +Version 1.5.0beta05 [February 12, 2010] + Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the + linewrapping that it entailed. + Revised comments in pngstruct.h and pnginfo.h and added pointers to + the libpng license. + Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES Removed the cbuilder5 project, which has not been updated to 1.4.0. - Complete rewrite of two-pass png_decompress_chunk() by John Bowler. -version 1.4.1beta12 [February 14, 2010] - Fixed type declaration of png_get_user_malloc_max() in pngget.c (Daisuke +Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010] + Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke Nishikawa) -version 1.4.1rc02 [January 18, 2010] - No changes. +Version 1.5.0beta07 [omitted] -version 1.4.1rc03 [February 19, 2010] +Version 1.5.0beta08 [February 19, 2010] + Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED + wherever png_snprintf() is used to construct error and warning messages. Noted in scripts/makefile.mingw that it expects to be run under MSYS. Removed obsolete unused MMX-querying support from contrib/gregbook + Added exported png_longjmp() function. Removed the AIX redefinition of jmpbuf in png.h - Define _ALL_SOURCE in configure.ac, makefile.aix, and CMakeLists.txt - when using AIX compiler. + Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt + when building on AIX. + +Version 1.5.0beta09 [February 19, 2010] + Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt. + Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h -version 1.4.1rc04 [February 19, 2010] +Version 1.5.0beta10 [February 25, 2010] Removed unused gzio.c from contrib/pngminim gather and makefile scripts + Removed replacement error handlers from contrib/gregbook. Because of + the new png_longjmp() function they are no longer needed. -version 1.4.1 [February 25, 2010] +Version 1.5.0beta11 [March 6, 2010] + Removed checking for already-included setjmp.h from pngconf.h + Fixed inconsistent indentations and made numerous cosmetic changes. + Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5 -version 1.4.2beta01 [April 1, 2010] - Conditionally compile an "else" statement in png_decompress_chunk(). - Restored the macro definition of png_check_sig(). +Version 1.5.0beta12 [March 9, 2010] + Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from + the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES" + and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler). + Created new pngdebug.h and moved debug definitions there. -version 1.4.2rc01 [April 10, 2010] - No changes. +Version 1.5.0beta13 [March 10, 2010] + Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice. + Revise the "#ifdef" blocks in png_inflate() so it will compile when neither + PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED + is defined. + Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3 + Moved the 'config.h' support from pngconf.h to pngpriv.h + Removed PNGAPI from the png_longjmp_ptr typedef. + Eliminated dependence of pngtest.c on the private pngdebug.h file. + Make all png_debug macros into *unterminated* statements or + expressions (i.e. a trailing ';' must always be added) and correct + the format statements in various png_debug messages. + +Version 1.5.0beta14 [March 14, 2010] + Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c + Revised Makefile.am to account for recent additions and replacements. + Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and + added ordinal numbers to the Windows DEF file and corrected the duplicated + ordinal numbers on CE symbols that are commented out. + Added back in export symbols that can be present in the Windows build but + are disabled by default. + PNG_EXPORT changed to include an 'ordinal' field for DEF file generation. + PNG_CALLBACK added to make callback definitions uniform. PNGAPI split + into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks), + and appropriate changes made to all files. Cygwin builds re-hinged to + allow procedure call standard changes and to remove the need for the DEF + file (fixes build on Cygwin). + Enabled 'attribute' warnings that are relevant to library APIs and callbacks. + Changed rules for generation of the various symbol files and added a new + rule for a DEF file (which is also added to the distribution). + Updated the symbol file generation to stop it adding spurious spaces + to EOL (coming from preprocessor macro expansion). Added a facility + to join tokens in the output and rewrite *.dfn to use this. + Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71 + and removed scripts/makefile.cygwin. + Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built. + Removed the include of sys/types.h - apparently unnecessary now on the + platforms on which it happened (all but Mac OS and RISC OS). + Moved the Mac OS test into pngpriv.h (the only place it is used.) + +Version 1.5.0beta15 [March 17, 2010] + Added symbols.chk target to Makefile.am to validate the symbols in png.h + against the new DEF file scripts/symbols.def. + Changed the default DEF file back to pngwin.def. + Removed makefile.mingw. + Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN + +Version 1.5.0beta16 [April 1, 2010] + Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that + fields are initialized in all configurations. The READ/WRITE + macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as + before to disable code to actually read or write iTXt chunks + and iTXt_SUPPORTED can be used to detect presence of either + read or write support (but it is probably better to check for + the one actually required - read or write.) + Combined multiple png_warning() calls for a single error. + Restored the macro definition of png_check_sig(). -version 1.4.2rc02 [April 16, 2010] +Version 1.5.0beta17 [April 17, 2010] + Added some "(long)" typecasts to printf calls in png_handle_cHRM(). Documented the fact that png_set_dither() was disabled since libpng-1.4.0. Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect more accurately what it actually does. At the same time, renamed the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS. - -version 1.4.2rc03 [April 24, 2010] Added some "(long)" typecasts to printf calls in png_handle_cHRM(). + Freeze build-time only configuration in the build. + In all prior versions of libpng most configuration options + controlled by compiler #defines had to be repeated by the + application code that used libpng. This patch changes this + so that compilation options that can only be changed at build + time are frozen in the build. Options that are compiler + dependent (and those that are system dependent) are evaluated + each time - pngconf.h holds these. Options that can be changed + per-file in the application are in png.h. Frozen options are + in the new installed header file pnglibconf.h (John Bowler) + Removed the xcode project because it has not been updated to work + with libpng-1.5.0. + Removed the ability to include optional pngusr.h + +Version 1.5.0beta18 [April 17, 2010] + Restored the ability to include optional pngusr.h + Moved replacements for png_error() and png_warning() from the + contrib/pngminim project to pngerror.c, for use when warnings or + errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid + storing unneeded error/warning text. + Updated contrib/pngminim project to work with the new pnglibconf.h + Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space. + +Version 1.5.0beta19 [April 24, 2010] + Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions + to read and write ints to be disabled independently of PNG_USE_READ_MACROS, + which allows libpng to be built with the functions even though the default + is to use the macros - this allows applications to choose at app build + time whether or not to use macros (previously impossible because the + functions weren't in the default build.) + Changed Windows calling convention back to __cdecl for API functions. + For Windows/x86 platforms only: + __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses + __cdecl throughout (both API functions and callbacks) on Windows/x86 + platforms. + Replaced visualc6 and visualc71 projects with new vstudio project Relaxed the overly-restrictive permissions of some files. -version 1.4.2rc04 [April 28, 2010] - Added the "vstudio" project to replace "visualc6" and "visualc71" which - will be removed from libpng-1.5.0. - Demonstrate in example.c that lang_key should be initialized. +Version 1.5.0beta20 [April 24, 2010] + Relaxed more overly-restrictive permissions of some files. + +Version 1.5.0beta21 [April 27, 2010] + Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new + vstudio project files, and some trivial editing of some files in the + scripts directory. Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in contrib/pngminim/decoder/pngusr.h to make a smaller decoder application. -version 1.4.2rc05 [April 29, 2010] - Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined. - Removed dummy_inflate.c and uncompr.c from contrib/pngminim/encoder +Version 1.5.0beta22 [April 28, 2010] + Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS + because it has a macro equivalent. + Improved the options.awk script; added an "everything off" option. + Revised contrib/pngminim to use the "everything off" option in pngusr.dfa. + +Version 1.5.0beta23 [April 29, 2010] + Corrected PNG_REMOVED macro to take five arguments. + The macro was documented with two arguments (name,ordinal), however + the symbol checking .dfn files assumed five arguments. The five + argument form seems more useful so it is changed to that. Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED in gregbook/readpng2.c Corrected protection of png_get_user_transform_ptr. The API declaration in png.h is removed if both READ and WRITE USER_TRANSFORM are turned off but was left defined in pngtrans.c + Added logunsupported=1 to cause pnglibconf.h to document disabled options. + This makes the installed pnglibconf.h more readable but causes no + other change. The intention is that users of libpng will find it + easier to understand if an API they need is missing. + Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined. + Removed dummy_inflate.c from contrib/pngminim/encoder + Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile. -version 1.4.2rc06 [May 3, 2010] - Moved declarations of umsg[] inside the proper #ifdef blocks in pngrutil.c - -version 1.4.2 [May 6, 2010] +Version 1.5.0beta24 [May 7, 2010] + Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the + offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf. + Added more blank lines for readability. -version 1.4.3beta01 [June 18, 2010] - Added missing quotation marks in the aix block of configure.ac - The new "vstudio" project was missing from the zip and 7z distributions. +Version 1.5.0beta25 [June 18, 2010] In pngpread.c: png_push_have_row() add check for new_row > height - -version 1.4.3beta02 [June 18, 2010] Removed the now-redundant check for out-of-bounds new_row from example.c -version 1.4.3beta03 [June 18, 2010] - In pngpread.c: png_push_finish_row() add check for too many rows. - -version 1.4.3beta04 [June 19, 2010] +Version 1.5.0beta26 [June 18, 2010] In pngpread.c: png_push_process_row() add check for too many rows. - Removed the checks added in beta01 and beta03, as they are now redundant. -version 1.4.3beta05 [June 20, 2010] +Version 1.5.0beta27 [June 18, 2010] + Removed the check added in beta25 as it is now redundant. + +Version 1.5.0beta28 [June 20, 2010] Rewrote png_process_IDAT_data to consistently treat extra data as warnings and handle end conditions more cleanly. - Removed the new (beta04) check in png_push_process_row(). + Removed the new (beta26) check in png_push_process_row(). -version 1.4.3rc01 [June 21, 2010] - Revised some comments in png_process_IDAT_data(). +Version 1.5.0beta29 [June 21, 2010] + Revised scripts/options.awk to work on Sunos (but still doesn't work) + Added comment to options.awk and contrib/pngminim/*/makefile to try nawk. -version 1.4.3rc02 [June 22, 2010] - Changed char *msg to PNG_CONST char *msg in pngrutil.c +Version 1.5.0beta30 [June 22, 2010] Stop memory leak when reading a malformed sCAL chunk. - Removed some trailing blanks. -version 1.4.3rc03 [June 23, 2010] - Revised pngpread.c patch of beta05 to avoid an endless loop. +Version 1.5.0beta31 [June 26, 2010] + Revised pngpread.c patch of beta28 to avoid an endless loop. + Removed some trailing blanks. -version 1.4.3 [June 26, 2010] - Updated some of the "last changed" dates. +Version 1.5.0beta32 [June 26, 2010] + Removed leftover scripts/options.patch and scripts/options.rej -version 1.4.4beta01 [July 12, 2010] - Removed extraneous new_push_process_row.c file. - Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5 - Removed some newly-added TAB characters from pngpread.c. - Fixed some indentation in pngpread.c and pngrutil.c +Version 1.5.0beta33 [July 6, 3010] + Made FIXED and FLOATING options consistent in the APIs they enable and + disable. Corrected scripts/options.awk to handle both command line + options and options specified in the .dfa files. + Changed char *msg to PNG_CONST char *msg in pngrutil.c + Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or + floating point APIs, but not both. + Reversed patch to remove error handler when the jmp_buf is stored in the + main program structure, not the png_struct. + The error handler is needed because the default handler in libpng will + always use the jmp_buf in the library control structure; this is never + set. The gregbook code is a useful example because, even though it + uses setjmp/longjmp, it shows how error handling can be implemented + using control mechanisms not directly supported by libpng. The + technique will work correctly with mechanisms such as Microsoft + Structure Exceptions or C++ exceptions (compiler willing - note that gcc + does not by default support interworking of C and C++ error handling.) + Reverted changes to call png_longjmp in contrib/gregbook where it is not + appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp + cannot be used. Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans) Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {') - Put "#ifndef PNG_EXTERN, #endif" around "#define PNG_EXTERN" in pngpriv.h -version 1.4.4beta02 [July 24, 2010] +Version 1.5.0beta34 [July 12, 2010] + Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h + +Version 1.5.0beta35 [July 24, 2010] + Removed some newly-added TAB characters. Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2 Moved the definition of png_snprintf() outside of the enclosing #ifdef blocks in pngconf.h - Added a special case typedef of png_longjmp_ptr for WATCOM. -version 1.4.4beta03 [July 24, 2010] - Removed reference to cbuilder5/* from Makefile.in and Makefile.am - Eliminated the new special case typedef of png_longjmp_ptr for WATCOM - and made a special case "#define PNGAPI" in pngconf.h instead. - -version 1.4.4beta04 [July 31, 2010] - Updated the read macros and functions from 1.5.0beta38. - -version 1.4.4beta05 [August 6, 2010] - Updated projects/visualc71 so it can find scripts/pnglibconf.h - Removed unused png_mem_* defines from pngconf.h. +Version 1.5.0beta36 [July 29, 2010] + Patches by John Bowler: + Fixed point APIs are now supported throughout (no missing APIs). + Internal fixed point arithmetic support exists for all internal floating + point operations. + sCAL validates the floating point strings it is passed. + Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2 + Two new APIs exist to get the number of passes without turning on the + PNG_INTERLACE transform and to get the number of rows in the current + pass. + A new test program, pngvalid.c, validates the gamma code. + Errors in the 16-bit gamma correction (overflows) have been corrected. + cHRM chunk testing is done consistently (previously the floating point + API bypassed it, because the test really didn't work on FP, now the test + is performed on the actual values to be stored in the PNG file so it + works in the FP case too.) + Most floating point APIs now simply call the fixed point APIs after + converting the values to the fixed point form used in the PNG file. + The standard headers no longer include zlib.h, which is currently only + required for pngstruct.h and can therefore be internal. + Revised png_get_int_32 to undo the PNG two's complement representation of + negative numbers. + +Version 1.5.0beta37 [July 30, 2010] + Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid + a compiler warning. + Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png + +Version 1.5.0beta38 [July 31, 2010] + Implemented remaining "_fixed" functions. + Corrected a number of recently introduced warnings mostly resulting from + safe but uncast assignments to shorter integers. Also added a zlib + VStudio release library project because the latest zlib Official Windows + build does not include such a thing. + Revised png_get_int_16() to be similar to png_get_int_32(). + Restored projects/visualc71. + +Version 1.5.0beta39 [August 2, 2010] + VisualC/GCC warning fixes, VisualC build fixes + The changes include support for function attributes in VC in addition to + those already present in GCC - necessary because without these some + warnings are unavoidable. Fixes include signed/unsigned fixes in + pngvalid and checks with gcc -Wall -Wextra -Wunused. + VC requires function attributes on function definitions as well as + declarations, PNG_FUNCTION has been added to enable this and the + relevant function definitions changed. + +Version 1.5.0beta40 [August 6, 2010] Correct use of _WINDOWS_ in pngconf.h + Removed png_mem_ #defines; they are no longer used. + Added the sRGB chunk to pngtest.png -version 1.4.4beta06 [August 11, 2010] +Version 1.5.0beta41 [August 11, 2010] + Added the cHRM chunk to pngtest.png Don't try to use version-script with cygwin/mingw. Revised contrib/gregbook to work under cygwin/mingw. -version 1.4.4beta07 [August 26, 2010] - Updated prebuilt aclocal.m4 and ltmain.sh +Version 1.5.0beta42 [August 18, 2010] Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov) + Made all API functions that have const arguments and constant string + literal pointers declare them (John Bowler). + +Version 1.5.0beta43 [August 20, 2010] + Removed spurious tabs, shorten long lines (no source change) + Also added scripts/chkfmt to validate the format of all the files that can + reasonably be validated (it is suggested to run "make distclean" before + checking, because some machine generated files have long lines.) + Reformatted the CHANGES file to be more consistent throughout. + Made changes to address various issues identified by GCC, mostly + signed/unsigned and shortening problems on assignment but also a few + difficult to optimize (for GCC) loops. + Fixed non-GCC fixed point builds. In png.c a declaration was misplaced + in an earlier update. Fixed to declare the auto variables at the head. + Use cexcept.h in pngvalid.c. + +Version 1.5.0beta44 [August 24, 2010] Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for installing libpng in /usr/lib64 (Funda Wang). Revised CMakeLists.txt to put the man pages in share/man/man* not man/man* Revised CMakeLists.txt to make symlinks instead of copies when installing. Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman) - Moved "#include pngusr.h" ahead of PNG_USER_PRIVATEBUILD test in pngconf.h - Eliminated a deprecated reference to png_ptr->io_ptr in pngtest.c - Eliminated new unnecessary #if tests regarding the sCAL chunk from pngrutil.c + Implemented memory checks within pngvalid + Reformatted/rearranged pngvalid.c to assist use of progressive reader. + Check interlaced images in pngvalid + Clarified pngusr.h comments in pnglibconf.dfa + Simplified the pngvalid error-handling code now that cexcept.h is in place. + Implemented progressive reader in pngvalid.c for standard tests + Implemented progressive read in pngvalid.c gamma tests + Turn on progressive reader in pngvalid.c by default and tidy code. + +Version 1.5.0beta45 [August 26, 2010] + Added an explicit make step to projects/vstudio for pnglibconf.h + Also corrected zlib.vcxproj into which Visual Studio had introduced + what it calls an "authoring error". The change to make pnglibconf.h + simply copies the file; in the future it may actually generate the + file from scripts/pnglibconf.dfa as the other build systems do. + Changed pngvalid to work when floating point APIs are disabled + Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt + Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX + in pngpriv.h in case the user neglected to define them in their pngusr.h + +Version 1.5.0beta46 [August 28, 2010] + Added new private header files to libpng_sources in CMakeLists.txt + Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options. + Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project. + +Version 1.5.0beta47 [September 11, 2010] + Fixed a number of problems with 64-bit compilation reported by Visual + Studio 2010 (John Bowler). + +Version 1.5.0beta48 [October 4, 2010] + Updated CMakeLists.txt (Philip Lowman). + Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER, + $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE + Fixed problem with symbols creation in Makefile.am which was assuming that + all versions of ccp write to standard output by default (Martin Banky). The + bug was introduced in libpng-1.2.9beta5. + Removed unused mkinstalldirs. + +Version 1.5.0beta49 [October 8, 2010] + Undid Makefile.am revision of 1.5.0beta48. + +Version 1.5.0beta50 [October 14, 2010] + Revised Makefile.in to account for mkinstalldirs being removed. + Added some "(unsigned long)" typecasts in printf statements in pngvalid.c. + Suppressed a compiler warning in png_handle_sPLT(). + Check for out-of-range text compression mode in png_set_text(). + +Version 1.5.0beta51 [October 15, 2010] + Changed embedded dates to "(PENDING RELEASE) in beta releases (and future + rc releases) to minimize the difference between releases. + +Version 1.5.0beta52 [October 16, 2010] + Restored some of the embedded dates (in png.h, png.c, documentation, etc.) + +Version 1.5.0beta53 [October 18, 2010] + Updated INSTALL to mention using "make maintainer-clean" and to remove + obsolete statement about a custom ltmain.sh + Disabled "color-tests" by default in Makefile.am so it will work with + automake versions earlier than 1.11.1 + Use document name "libpng-manual.txt" instead of "libpng-.txt" + to simplify version differences. + Removed obsolete remarks about setjmp handling from INSTALL. + Revised and renamed the typedef in png.h and png.c that was designed + to catch library and header mismatch. + +Version 1.5.0beta54 [November 10, 2010] + Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks. + Used a consistent structure for the pngget.c functions. + +Version 1.5.0beta55 [November 21, 2010] + Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin) + Moved reading of file signature into png_read_sig (Cosmin) + Fixed atomicity of chunk header serialization (Cosmin) + Added test for io_state in pngtest.c (Cosmin) + Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts. + Changes to remove gcc warnings (John Bowler) + Certain optional gcc warning flags resulted in warnings in libpng code. + With these changes only -Wconversion and -Wcast-qual cannot be turned on. + Changes are trivial rearrangements of code. -Wconversion is not possible + for pngrutil.c (because of the widespread use of += et al on variables + smaller than (int) or (unsigned int)) and -Wcast-qual is not possible + with pngwio.c and pngwutil.c because the 'write' callback and zlib + compression both fail to declare their input buffers with 'const'. + +Version 1.5.0beta56 [December 7, 2010] + Added the private PNG_UNUSED() macro definition in pngpriv.h. + Added some commentary about PNG_EXPORT in png.h and pngconf.h + Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the + objective of simplifying and improving the cosmetic appearance of png.h. + Fixed some incorrect "=" macro names in pnglibconf.dfa + Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt + +Version 1.5.0beta57 [December 9, 2010] + Documented the pngvalid gamma error summary with additional comments and + print statements. + Improved missing symbol handling in checksym.awk; symbols missing in both + the old and new files can now be optionally ignored, treated as errors + or warnings. + Removed references to pngvcrd.c and pnggccrd.c from the vstudio project. + Updated "libpng14" to "libpng15" in the visualc71 project. + Enabled the strip16 tests in pngvalid.` + Don't display test results (except PASS/FAIL) when running "make test". + Instead put them in pngtest-log.txt + Added "--with-zprefix=" to configure.ac + Updated the prebuilt configuration files to autoconf version 2.68 + +Version 1.5.0beta58 [December 19, 2010] + Fixed interlace image handling and add test cases (John Bowler) + Fixed the clean rule in Makefile.am to remove pngtest-log.txt + Made minor changes to work around warnings in gcc 3.4 + +Version 1.5.0rc01 [December 27, 2010] + No changes. + +Version 1.5.0rc02 [December 27, 2010] + Eliminated references to the scripts/*.def files in project/visualc71. + +Version 1.5.0rc03 [December 28, 2010] + Eliminated scripts/*.def and revised Makefile.am accordingly + +Version 1.5.0rc04 [December 29, 2010] + Fixed bug in background transformation handling in pngrtran.c (it was + looking for the flag in png_ptr->transformations instead of in + png_ptr->flags) (David Raymond). + +Version 1.5.0rc05 [December 31, 2010] + Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin) -version 1.4.4beta08 [September 2, 2010] - Updated the xcode project to work with libpng-1.4.x and added iOS targets - for simulator and device (Philippe Hausler). +Version 1.5.0rc06 [January 4, 2011] + Changed the new configure option "zprefix=string" to "zlib-prefix=string" -version 1.4.4rc01 [September 10, 2010] +Version 1.5.0rc07 [January 4, 2011] + Updated copyright year. + +Version 1.5.0 [January 6, 2011] No changes. -version 1.4.4rc02 [September 13, 2010] - Revised CMakeLists.txt (Philip Lowman). +version 1.5.1beta01 [January 8, 2011] + Added description of png_set_crc_action() to the manual. + Added a note in the manual that the type of the iCCP profile was changed + from png_charpp to png_bytepp in png_get_iCCP(). This change happened + in version 1.5.0beta36 but is not noted in the CHANGES. Similarly, + it was changed from png_charpp to png_const_bytepp in png_set_iCCP(). + Ensure that png_rgb_to_gray ignores palette mapped images, if libpng + internally happens to call it with one, and fixed a failure to handle + palette mapped images correctly. This fixes CVE-2690. + +Version 1.5.1beta02 [January 14, 2011] + Fixed a bug in handling of interlaced images (bero at arklinux.org). + Updated CMakeLists.txt (Clifford Yapp) + +Version 1.5.1beta03 [January 14, 2011] + Fixed typecasting of some png_debug() statements (Cosmin) + +Version 1.5.1beta04 [January 16, 2011] + Updated documentation of png_set|get_tRNS() (Thomas Klausner). + Mentioned in the documentation that applications must #include "zlib.h" + if they need access to anything in zlib.h, and that a number of + macros such as png_memset() are no longer accessible by applications. + Corrected pngvalid gamma test "sample" function to access all of the color + samples of each pixel, instead of sampling the red channel three times. + Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow" + warnings, and (mistakenly) changed png_exp() to exp(). + +Version 1.5.1beta05 [January 16, 2011] + Changed variable names png_index, png_div, png_exp, and png_gamma to + char_index, divisor, exp_b10, and gamma_val, respectively, and + changed exp() back to png_exp(). + +Version 1.5.1beta06 [January 20, 2011] + Prevent png_push_crc_skip() from hanging while reading an unknown chunk + or an over-large compressed zTXt chunk with the progressive reader. + Eliminated more GCC "shadow" warnings. + Revised png_fixed() in png.c to avoid compiler warning about reaching the + end without returning anything. + +Version 1.5.1beta07 [January 22, 2011] + In the manual, describe the png_get_IHDR() arguments in the correct order. + Added const_png_structp and const_png_infop types, and used them in + prototypes for most png_get_*() functions. + +Version 1.5.1beta08 [January 23, 2011] + Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name() + Added synopses for the IO_STATE functions and other missing synopses + to the manual. Removed the synopses from libpngpf.3 because they + were out of date and no longer useful. Better information can be + obtained by reading the prototypes and comments in pngpriv.h + Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build + Added a make macro DFNCPP that is a CPP that will accept the tokens in + a .dfn file and adds configure stuff to test for such a CPP. ./configure + should fail if one is not available. + Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace. + Added png_get_current_row_number and png_get_current_pass_number for the + benefit of the user transform callback. + Added png_process_data_pause and png_process_data_skip for the benefit of + progressive readers that need to stop data processing or want to optimize + skipping of unread data (e.g., if the reader marks a chunk to be skipped.) + +Version 1.5.1beta09 [January 24, 2011] + Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error. + pngvalid contains tests of transforms, which tests are currently disabled + because they are incompletely tested. gray_to_rgb was failing to expand + the bit depth for smaller bit depth images; this seems to be a long + standing error and resulted, apparently, in invalid output + (CVE-2011-0408, CERT VU#643140). The documentation did not accurately + describe what libpng really does when converting RGB to gray. + +Version 1.5.1beta10 [January 27, 2010] + Fixed incorrect examples of callback prototypes in the manual, that were + introduced in libpng-1.0.0. + In addition the order of the png_get_uint macros with respect to the + relevant function definitions has been reversed. This helps the + preprocessing of the symbol files be more robust. Furthermore, the + symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when + the library may actually be built with PNG_USE_READ_MACROS; this stops + the read macros interfering with the symbol file format. + Made the manual, synopses, and function prototypes use the function + argument names file_gamma, int_file_gamma, and srgb_intent consistently. + +Version 1.5.1beta11 [January 28, 2011] + Changed PNG_UNUSED from "param=param;" to "{if(param){}}". + Corrected local variable type in new API png_process_data_skip() + The type was self-evidently incorrect but only causes problems on 64-bit + architectures. + Added transform tests to pngvalid and simplified the arguments. + +Version 1.5.1rc01 [January 29, 2011] + No changes. -version 1.4.4rc03 [September 14, 2010] - Removed an extraneous close-double-quote from CMakeLists.txt - Eliminated another deprecated reference to png_ptr->io_ptr in pngtest.c +Version 1.5.1rc02 [January 31, 2011] + Added a request in the manual that applications do not use "png_" or + "PNG_" to begin any of their own symbols. + Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h -version 1.4.4rc04 [September 16, 2010] - Fixed indentation and removed debugging message from CMakeLists.txt - Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER, - $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE +Version 1.5.1 [February 3, 2011] + No changes. + +Version 1.5.2beta01 [February 13, 2011] + More -Wshadow fixes for older gcc compilers. Older gcc versions apparently + check formal parameters names in function declarations (as well as + definitions) to see if they match a name in the global namespace. + Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the + old VisualC++ preprocessor. + Turned on interlace handling in png_read_png(). + Fixed gcc pendantic warnings. + Handle longjmp in Cygwin. + Fixed png_get_current_row_number() in the interlaced case. + Cleaned up ALPHA flags and transformations. + Implemented expansion to 16 bits. + +Version 1.5.2beta02 [February 19, 2011] + Fixed mistake in the descriptions of user read_transform and write_transform + function prototypes in the manual. The row_info struct is png_row_infop. + Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior. + Corrected png_get_current_row_number documentation + Fixed the read/write row callback documentation. + This documents the current behavior, where the callback is called after + every row with information pertaining to the next row. + +Version 1.5.2beta03 [March 3, 2011] + Fixed scripts/makefile.vcwin32 + Updated contrib/pngsuite/README to add the word "modify". + Define PNG_ALLOCATED to blank when _MSC_VER<1300. + +Version 1.5.2rc01 [March 19, 2011] + Define remaining attributes to blank when MSC_VER<1300. + ifdef out mask arrays in pngread.c when interlacing is not supported. + +Version 1.5.2rc02 [March 22, 2011] + Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak + and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip" + from the makefiles. + Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail + to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill) + +Version 1.5.2rc03 [March 24, 2011] + Don't include standard header files in png.h while building the symbol table, + to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro). + +Version 1.5.2 [March 31, 2011] + No changes. + +Version 1.5.3beta01 [April 1, 2011] + Re-initialize the zlib compressor before compressing non-IDAT chunks. + Added API functions (png_set_text_compression_level() and four others) to + set parameters for zlib compression of non-IDAT chunks. + +Version 1.5.3beta02 [April 3, 2011] + Updated scripts/symbols.def with new API functions. + Only compile the new zlib re-initializing code when text or iCCP is + supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro. + Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03). + Optimize the zlib CMF byte in non-IDAT compressed chunks + +Version 1.5.3beta03 [April 16, 2011] + Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have + snprintf, and the "__STRICT_ANSI__" detects that condition more reliably + than __STDC__ (John Bowler). + Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells + the compiler that a user supplied callback (the error handler) does not + return, yet there is no guarantee in practice that the application code + will correctly implement the error handler because the compiler only + issues a warning if there is a mistake (John Bowler). + Removed the no-longer-used PNG_DEPSTRUCT macro. + Updated the zlib version to 1.2.5 in the VStudio project. + Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in + pngwutil.c (John Bowler). + Fixed bug with stripping the filler or alpha channel when writing, that + was introduced in libpng-1.5.2beta01 (bug report by Andrew Church). + +Version 1.5.3beta04 [April 27, 2011] + Updated pngtest.png with the new zlib CMF optimization. + Cleaned up conditional compilation code and of background/gamma handling + Internal changes only except a new option to avoid compiling the + png_build_grayscale_palette API (which is not used at all internally.) + The main change is to move the transform tests (READ_TRANSFORMS, + WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids + calls to spurious functions if all transforms are disabled and slightly + simplifies those functions. Pngvalid modified to handle this. + A minor change is to stop the strip_16 and expand_16 interfaces from + disabling each other; this allows the future alpha premultiplication + code to use 16-bit intermediate values while still producing 8-bit output. + png_do_background and png_do_gamma have been simplified to take a single + pointer to the png_struct rather than pointers to every item required + from the png_struct. This makes no practical difference to the internal + code. + A serious bug in the pngvalid internal routine 'standard_display_init' has + been fixed - this failed to initialize the red channel and accidentally + initialized the alpha channel twice. + Changed png_struct jmp_buf member name from png_jmpbuf to tmp_jmpbuf to + avoid a possible clash with the png_jmpbuf macro on some platforms. + +Version 1.5.3beta05 [May 6, 2011] + Added the "_POSIX_SOURCE" feature test macro to ensure libpng sees the + correct API. _POSIX_SOURCE is defined in pngpriv.h, pngtest.c and + pngvalid.c to ensure that POSIX conformant systems disable non-POSIX APIs. + Removed png_snprintf and added formatted warning messages. This change adds + internal APIs to allow png_warning messages to have parameters without + requiring the host OS to implement snprintf. As a side effect the + dependency of the tIME-supporting RFC1132 code on stdio is removed and + PNG_NO_WARNINGS does actually work now. + Pass "" instead of '\0' to png_default_error() in png_err(). This mistake + was introduced in libpng-1.2.20beta01. This fixes CVE-2011-2691. + Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte + optimization configureable. + IDAT compression failed if preceded by a compressed text chunk (bug + introduced in libpng-1.5.3beta01-02). This was because the attempt to + reset the zlib stream in png_write_IDAT happened after the first IDAT + chunk had been deflated - much too late. In this change internal + functions were added to claim/release the z_stream and, hopefully, make + the code more robust. Also deflateEnd checking is added - previously + libpng would ignore an error at the end of the stream. + +Version 1.5.3beta06 [May 8, 2011] + Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt + Implemented premultiplied alpha support: png_set_alpha_mode API + +Version 1.5.3beta07 [May 11, 2011] + Added expand_16 support to the high level interface. + Added named value and 'flag' gamma support to png_set_gamma. Made a minor + change from the previous (unreleased) ABI/API to hide the exact value used + for Macs - it's not a good idea to embed this in the ABI! + Moved macro definitions for PNG_HAVE_IHDR, PNG_HAVE_PLTE, and PNG_AFTER_IDAT + from pngpriv.h to png.h because they must be visible to applications + that call png_set_unknown_chunks(). + Check for up->location !PNG_AFTER_IDAT when writing unknown chunks + before IDAT. + +Version 1.5.3beta08 [May 16, 2011] + Improved "pngvalid --speed" to exclude more of pngvalid from the time. + Documented png_set_alpha_mode(), other changes in libpng.3/libpng-manual.txt + The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative + parameters are supplied by the caller), while in the absence of cHRM + sRGB/Rec 709 values are still used. This introduced a divide-by-zero + bug in png_handle_cHRM(). + The bKGD chunk no longer overwrites the background value set by + png_set_background(), allowing the latter to be used before the file + header is read. It never performed any useful function to override + the default anyway. + Added memory overwrite and palette image checks to pngvalid.c + Previously palette image code was poorly checked. Since the transformation + code has a special palette path in most cases this was a severe weakness. + Minor cleanup and some extra checking in pngrutil.c and pngrtran.c. When + expanding an indexed image, always expand to RGBA if transparency is + present. + +Version 1.5.3beta09 [May 17, 2011] + Reversed earlier 1.5.3 change of transformation order; move png_expand_16 + back where it was. The change doesn't work because it requires 16-bit + gamma tables when the code only generates 8-bit ones. This fails + silently; the libpng code just doesn't do any gamma correction. Moving + the tests back leaves the old, inaccurate, 8-bit gamma calculations, but + these are clearly better than none! + +Version 1.5.3beta10 [May 20, 2011] + + png_set_background() and png_expand_16() did not work together correctly. + This problem is present in 1.5.2; if png_set_background is called with + need_expand false and the matching 16 bit color libpng erroneously just + treats it as an 8-bit color because of where png_do_expand_16 is in the + transform list. This simple fix reduces the supplied colour to 8-bits, + so it gets smashed, but this is better than the current behavior. + Added tests for expand16, more fixes for palette image tests to pngvalid. + Corrects the code for palette image tests and disables attempts to + validate palette colors. + +Version 1.5.3rc01 [June 3, 2011] + No changes. -version 1.4.4rc05 [September 20, 2010] - Rebuilt configure scripts with automake-1.11.1 instead of automake-1.11. - Removed unused mkinstalldirs file. +Version 1.5.3rc02 [June 8, 2011] + Fixed uninitialized memory read in png_format_buffer() (Bug report by + Frank Busse, CVE-2011-2501, related to CVE-2004-0421). + +Version 1.5.3beta11 [June 11, 2011] + Fixed png_handle_sCAL which is broken in 1.5. This fixes CVE 2011-2692. + Added sCAL to pngtest.png + Revised documentation about png_set_user_limits() to say that it also affects + png writing. + Revised handling of png_set_user_limits() so that it can increase the + limit beyond the PNG_USER_WIDTH|HEIGHT_MAX; previously it could only + reduce it. + Make the 16-to-8 scaling accurate. Dividing by 256 with no rounding is + wrong (high by one) 25% of the time. Dividing by 257 with rounding is + wrong in 128 out of 65536 cases. Getting the right answer all the time + without division is easy. + Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro. + Added projects/owatcom, an IDE project for OpenWatcom to replace + scripts/makefile.watcom. This project works with OpenWatcom 1.9. The + IDE autogenerates appropriate makefiles (libpng.mk) for batch processing. + The project is configurable, unlike the Visual Studio project, so long + as the developer has an awk. + Changed png_set_gAMA to limit the gamma value range so that the inverse + of the stored value cannot overflow the fixed point representation, + and changed other things OpenWatcom warns about. + Revised pngvalid.c to test PNG_ALPHA_MODE_SUPPORTED correctly. This allows + pngvalid to build when ALPHA_MODE is not supported, which is required if + it is to build on libpng 1.4. + Removed string/memory macros that are no longer used and are not + necessarily fully supportable, particularly png_strncpy and png_snprintf. + Added log option to pngvalid.c and attempted to improve gamma messages. + +Version 1.5.3 [omitted] + People found the presence of a beta release following an rc release + to be confusing; therefore we bump the version to libpng-1.5.4beta01 + and there will be no libpng-1.5.3 release. + +Version 1.5.4beta01 [June 14, 2011] + Made it possible to undefine PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED + to get the same (inaccurate) output as libpng-1.5.2 and earlier. + Moved definitions of PNG_HAVE_IHDR, PNG_AFTER_IDAT, and PNG_HAVE_PLTE + outside of an unknown-chunk block in png.h because they are also + needed for other uses. + +Version 1.5.4beta02 [June 14, 2011] + Fixed and clarified LEGACY 16-to-8 scaling code. + Added png_set_chop_16() API, to match inaccurate results from previous + libpng versions. + Removed the ACCURATE and LEGACY options (they are no longer useable) + Use the old scaling method for background if png_set_chop_16() was + called. + Made png_set_chop_16() API removeable by disabling PNG_CHOP_16_TO_8_SUPPORTED + +Version 1.5.4beta03 [June 15, 2011] + Fixed a problem in png_do_expand_palette() exposed by optimization in + 1.5.3beta06 + Also removed a spurious and confusing "trans" member ("trans") from png_info. + The palette expand optimization prevented expansion to an intermediate RGBA + form if tRNS was present but alpha was marked to be stripped; this exposed + a check for tRNS in png_do_expand_palette() which is inconsistent with the + code elsewhere in libpng. + Correction to the expand_16 code; removed extra instance of + png_set_scale_16_to_8 from pngpriv.h + +Version 1.5.4beta04 [June 16, 2011] + Added a missing "#ifdef PNG_READ_BACKGROUND_SUPPORTED/#endif" in pngrtran.c + Added PNG_TRANSFORM_CHOP_16 to the high-level read transforms. + Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again. If this is + not enabled, png_set_strip_16() and png_do_scale_16_to_8() aren't built. + Revised contrib/visupng, gregbook, and pngminim to demonstrate chop_16_to_8 + +Version 1.5.4beta05 [June 16, 2011] + Renamed png_set_strip_16() to png_set_scale_16() and renamed + png_set_chop_16() to png_set_strip(16) in an attempt to minimize the + behavior changes between libpng14 and libpng15. + +Version 1.5.4beta06 [June 18, 2011] + Fixed new bug that was causing both strip_16 and scale_16 to be applied. + +Version 1.5.4beta07 [June 19, 2011] + Fixed pngvalid, simplified macros, added checking for 0 in sCAL. + The ACCURATE scale macro is no longer defined in 1.5 - call the + png_scale_16_to_8 API. Made sure that PNG_READ_16_TO_8 is still defined + if the png_strip_16_to_8 API is present. png_check_fp_number now + maintains some state so that positive, negative and zero values are + identified. sCAL uses these to be strictly spec conformant. + +Version 1.5.4beta08 [June 23, 2011] + Fixed pngvalid if ACCURATE_SCALE is defined. + Updated scripts/pnglibconf.h.prebuilt. + +Version 1.5.4rc01 [June 30, 2011] + Define PNG_ALLOCATED to "restrict" only if MSC_VER >= 1400. + +Version 1.5.4 [July 7, 2011] + No changes. + +Version 1.5.5beta01 [July 13, 2011] + Fixed some typos and made other minor changes in the manual. + Updated contrib/pngminus/makefile.std (Samuli Souminen) + +Version 1.5.5beta02 [July 14, 2011] + Revised Makefile.am and Makefile.in to look in the right directory for + pnglibconf.h.prebuilt + +Version 1.5.5beta03 [July 27, 2011] + Enabled compilation with g++ compiler. This compiler does not recognize + the file extension, so it always compiles with C++ rules. Made minor + changes to pngrutil.c to cast results where C++ expects it but C does not. + Minor editing of libpng.3 and libpng-manual.txt. + +Version 1.5.5beta04 [July 29, 2011] + Revised CMakeLists.txt (Clifford Yapp) + Updated commentary about the png_rgb_to_gray() default coefficients + in the manual and in pngrtran.c + +Version 1.5.5beta05 [August 17, 2011] + Prevent unexpected API exports from non-libpng DLLs on Windows. The "_DLL" + is removed from the test of whether a DLL is being built (this erroneously + caused the libpng APIs to be marked as DLL exports in static builds under + Microsoft Visual Studio). Almost all of the libpng building configuration + is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in + pngconf.h, though, so that it is colocated with the import definition (it + is no longer used anywhere in the installed headers). The VStudio project + definitions have been cleaned up: "_USRDLL" has been removed from the + static library builds (this was incorrect), and PNG_USE_DLL has been added + to pngvalid to test the functionality (pngtest does not supply it, + deliberately). The spurious "_EXPORTS" has been removed from the + libpng build (all these errors were a result of copy/paste between project + configurations.) + Added new types and internal functions for CIE RGB end point handling to + pngpriv.h (functions yet to be implemented). + +Version 1.5.5beta06 [August 26, 2011] + Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set in CMakeLists.txt + (Clifford Yap) + Fixes to rgb_to_gray and cHRM XYZ APIs (John Bowler): + The rgb_to_gray code had errors when combined with gamma correction. + Some pixels were treated as true grey when they weren't and such pixels + and true grey ones were not gamma corrected (the original value of the + red component was used instead). APIs to get and set cHRM using color + space end points have been added and the rgb_to_gray code that defaults + based on cHRM, and the divide-by-zero bug in png_handle_cHRM (CERT + VU#477046, CVE-2011-3328, introduced in 1.5.4) have been corrected. + A considerable number of tests has been added to pngvalid for the + rgb_to_gray transform. + Arithmetic errors in rgb_to_gray whereby the calculated gray value was + truncated to the bit depth rather than rounded have been fixed except in + the 8-bit non-gamma-corrected case (where consistency seems more important + than correctness.) The code still has considerable inaccuracies in the + 8-bit case because 8-bit linear arithmetic is used. + +Version 1.5.5beta07 [September 7, 2011] + Added "$(ARCH)" option to makefile.darwin + Added SunOS support to configure.ac and Makefile.am + Changed png_chunk_benign_error() to png_warning() in png.c, in + png_XYZ_from_xy_checked(). + +Version 1.5.5beta08 [September 10, 2011] + Fixed 64-bit compilation errors (gcc). The errors fixed relate + to conditions where types that are 32 bits in the GCC 32-bit + world (uLong and png_size_t) become 64 bits in the 64-bit + world. This produces potential truncation errors which the + compiler correctly flags. + Relocated new HAVE_SOLARIS_LD definition in configure.ac + Constant changes for 64-bit compatibility (removal of L suffixes). The + 16-bit cases still use "L" as we don't have a 16-bit test system. + +Version 1.5.5rc01 [September 15, 2011] + Removed "L" suffixes in pngpriv.h + +Version 1.5.5 [September 22, 2011] + No changes. -version 1.4.4 [September 23, 2010] +Version 1.5.6beta01 [September 22, 2011] + Fixed some 64-bit type conversion warnings in pngrtran.c + Moved row_info from png_struct to a local variable. + The various interlace mask arrays have been made into arrays of + bytes and made PNG_CONST and static (previously some arrays were + marked PNG_CONST and some weren't). + Additional checks have been added to the transform code to validate the + pixel depths after the transforms on both read and write. + Removed some redundant code from pngwrite.c, in png_destroy_write_struct(). + Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4]. + This removes the need to allocate temporary strings for chunk names on + the stack in the read/write code. Unknown chunk handling still uses the + string form because this is exposed in the API. + +Version 1.5.6beta02 [September 26, 2011] + Added a note in the manual the png_read_update_info() must be called only + once with a particular info_ptr. + Fixed a typo in the definition of the new PNG_STRING_FROM_CHUNK(s,c) macro. + +Version 1.5.6beta03 [September 28, 2011] + Revised test-pngtest.sh to report FAIL when pngtest fails. + Added "--strict" option to pngtest, to report FAIL when the failure is + only because the resulting valid files are different. + Revised CMakeLists.txt to work with mingw and removed some material from + CMakeLists.txt that is no longer useful in libpng-1.5. + +Version 1.5.6beta04 [October 5, 2011] + Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")." + +Version 1.5.6beta05 [October 12, 2011] + Speed up png_combine_row() for interlaced images. This reduces the generality + of the code, allowing it to be optimized for Adam7 interlace. The masks + passed to png_combine_row() are now generated internally, avoiding + some code duplication and localizing the interlace handling somewhat. + Align png_struct::row_buf - previously it was always unaligned, caused by + a bug in the code that attempted to align it; the code needs to subtract + one from the pointer to take account of the filter byte prepended to + each row. + Optimized png_combine_row() when rows are aligned. This gains a small + percentage for 16-bit and 32-bit pixels in the typical case where the + output row buffers are appropriately aligned. The optimization was not + previously possible because the png_struct buffer was always misaligned. + Fixed bug in png_write_chunk_header() debug print, introduced in 1.5.6beta01. + +Version 1.5.6beta06 [October 17, 2011] + Removed two redundant tests for unitialized row. + Fixed a relatively harmless memory overwrite in compressed text writing + with a 1 byte zlib buffer. + Add ability to call png_read_update_info multiple times to pngvalid.c. + Fixes for multiple calls to png_read_update_info. These fixes attend to + most of the errors revealed in pngvalid, however doing the gamma work + twice results in inaccuracies that can't be easily fixed. There is now + a warning in the code if this is going to happen. + Turned on multiple png_read_update_info in pngvalid transform tests. + Prevent libpng from overwriting unused bits at the end of the image when + it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would + overwrite the partial byte at the end of each row if the row width was not + an exact multiple of 8 bits and the image is not interlaced. + +Version 1.5.6beta07 [October 21, 2011] + Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row + (Mans Rullgard). + +Version 1.5.6rc01 [October 26, 2011] + Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM" + +Version 1.5.6rc02 [October 27, 2011] + Added LSR() macro to defend against buggy compilers that evaluate non-taken + code branches and complain about out-of-range shifts. + +Version 1.5.6rc03 [October 28, 2011] + Renamed the LSR() macro to PNG_LSR() and added PNG_LSL() macro. + Fixed compiler warnings with Intel and MSYS compilers. The logical shift + fix for Microsoft Visual C is required by other compilers, so this + enables that fix for all compilers when using compile-time constants. + Under MSYS 'byte' is a name declared in a system header file, so we + changed the name of a local variable to avoid the warnings that result. + Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h + +Version 1.5.6 [November 3, 2011] No changes. -Send comments/corrections/commendations to glennrp at users.sourceforge.net -or to png-mng-implement at lists.sf.net (subscription required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-implement). +Send comments/corrections/commendations to png-mng-implement at lists.sf.net +(subscription required; visit +https://lists.sourceforge.net/lists/listinfo/png-mng-implement +to subscribe) +or to glennrp at users.sourceforge.net Glenn R-P -*/ } #endif diff --git a/src/png/CMakeLists.txt b/src/png/CMakeLists.txt index 56c0b6fba8..a3b5a315fc 100644 --- a/src/png/CMakeLists.txt +++ b/src/png/CMakeLists.txt @@ -1,10 +1,24 @@ +# CMakeLists.txt + +# Copyright (C) 2007-2011 Glenn Randers-Pehrson + +# This code is released under the libpng license. +# For conditions of distribution and use, see the disclaimer +# and license in png.h + cmake_minimum_required(VERSION 2.4.4) set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true) if(UNIX AND NOT DEFINED CMAKE_BUILD_TYPE) if(CMAKE_MAJOR_VERSION EQUAL 2 AND CMAKE_MINOR_VERSION EQUAL 4) # workaround CMake 2.4.x bug - set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.") + set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING + "Choose the type of build, options are: + None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) + Debug + Release + RelWithDebInfo + MinSizeRel.") else() set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type of build, options are: @@ -19,15 +33,9 @@ endif() project(libpng C) enable_testing() -# Copyright (C) 2007-2010 Glenn Randers-Pehrson - -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - set(PNGLIB_MAJOR 1) -set(PNGLIB_MINOR 4) -set(PNGLIB_RELEASE 4) +set(PNGLIB_MINOR 5) +set(PNGLIB_RELEASE 6) set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR}) set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE}) @@ -61,39 +69,11 @@ else() option(PNG_STATIC "Build static lib" ON) endif() -if(MINGW) - option(PNG_TESTS "Build pngtest" NO) -else() - option(PNG_TESTS "Build pngtest" YES) -endif() +option(PNG_TESTS "Build libpng tests" YES) -option(PNG_NO_CONSOLE_IO "FIXME" YES) -option(PNG_NO_STDIO "FIXME" YES) +# Many more configuration options could be added here option(PNG_DEBUG "Build with debug output" NO) -option(PNGARG "FIXME" YES) -#TODO: -# PNG_CONSOLE_IO_SUPPORTED - -# maybe needs improving, but currently I don't know when we can enable what :) -set(png_asm_tmp "OFF") -if(NOT WIN32) - find_program(uname_executable NAMES uname PATHS /bin /usr/bin /usr/local/bin) - if(uname_executable) - exec_program(${uname_executable} - ARGS --machine OUTPUT_VARIABLE uname_output) - if("uname_output" MATCHES "^.*i[1-9]86.*$") - set(png_asm_tmp "ON") - else("uname_output" MATCHES "^.*i[1-9]86.*$") - set(png_asm_tmp "OFF") - endif("uname_output" MATCHES "^.*i[1-9]86.*$") - endif(uname_executable) -else() - # this env var is normally only set on win64 - set(TEXT "ProgramFiles(x86)") - if("$ENV{${TEXT}}" STREQUAL "") - set(png_asm_tmp "ON") - endif("$ENV{${TEXT}}" STREQUAL "") -endif() +option(PNGARG "Disable ANSI-C prototypes" NO) # SET LIBNAME set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR}) @@ -101,12 +81,26 @@ set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR}) # to distinguish between debug and release lib set(CMAKE_DEBUG_POSTFIX "d") +# Use the prebuilt pnglibconf.h file from the scripts folder +# TODO: fix this by building with awk; without this no cmake build can be +# configured directly (to do so indirectly use your local awk to build a +# pnglibconf.h in the build directory.) +configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt + ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h) +include_directories(${CMAKE_CURRENT_BINARY_DIR}) # OUR SOURCES -set(libpng_sources +set(libpng_public_hdrs png.h pngconf.h + ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h +) +set(libpng_sources + ${libpng_public_hdrs} + pngdebug.h + pnginfo.h pngpriv.h + pngstruct.h png.c pngerror.c pngget.c @@ -126,44 +120,21 @@ set(libpng_sources set(pngtest_sources pngtest.c ) +set(pngvalid_sources + pngvalid.c +) # SOME NEEDED DEFINITIONS add_definitions(-DPNG_CONFIGURE_LIBPNG) -if(_AIX) - add_definitions(-D_ALL_SOURCE) -endif(_AIX) - if(MSVC) - add_definitions(-DPNG_NO_MODULEDEF -D_CRT_SECURE_NO_DEPRECATE) + add_definitions(-D_CRT_SECURE_NO_DEPRECATE) endif(MSVC) -if(PNG_SHARED OR NOT MSVC) - #if building msvc static this has NOT to be defined - add_definitions(-DZLIB_DLL) -endif() - - -if(PNG_CONSOLE_IO_SUPPORTED) - add_definitions(-DPNG_CONSOLE_IO_SUPPORTED) -endif() - -if(PNG_NO_CONSOLE_IO) - add_definitions(-DPNG_NO_CONSOLE_IO) -endif() - -if(PNG_NO_STDIO) - add_definitions(-DPNG_NO_STDIO) -endif() - if(PNG_DEBUG) add_definitions(-DPNG_DEBUG) endif() -if(NOT M_LIBRARY AND NOT WIN32) - add_definitions(-DPNG_NO_FLOATING_POINT_SUPPORTED) -endif() - # NOW BUILD OUR TARGET include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR}) @@ -188,7 +159,6 @@ if(PNG_STATIC) target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY}) endif() - if(PNG_SHARED AND WIN32) set_target_properties(${PNG_LIB_NAME} PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL) endif() @@ -198,54 +168,70 @@ if(PNG_TESTS AND PNG_SHARED) add_executable(pngtest ${pngtest_sources}) target_link_libraries(pngtest ${PNG_LIB_NAME}) add_test(pngtest ./pngtest ${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png) + # + add_executable(pngvalid ${pngvalid_sources}) + target_link_libraries(pngvalid ${PNG_LIB_NAME}) + add_test(pngvalid ./pngvalid) endif() -# +# Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set +IF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY) + IF(WIN32) + SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "bin") + ELSE(WIN32) + SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "lib") + ENDIF(WIN32) +ENDIF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY) + # Set a variable with CMake code which: # Creates a symlink from src to dest (if possible) or alternatively # copies if different. -macro(_png_generate_symlink_code CODE SRC DEST) +macro(CREATE_SYMLINK SRC_FILE DEST_FILE) + FILE(REMOVE ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}) if(WIN32 AND NOT CYGWIN) - set(_png_gsc_message "Copying ${SRC} to ${DEST} if needed") - set(_png_gsc_operation "copy_if_different") - else() - set(_png_gsc_message "Symlinking ${SRC} to ${DEST}") - set(_png_gsc_operation "create_symlink") - endif() - - set(${CODE} " - message(STATUS \"${_png_gsc_message}\") - execute_process(COMMAND \${CMAKE_COMMAND} -E ${_png_gsc_operation} - \"${SRC}\" \"${DEST}\") - ") + ADD_CUSTOM_COMMAND( + OUTPUT ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE} + COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} + COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE} + DEPENDS ${PNG_LIB_NAME} ${PNG_LIB_NAME_STATIC} + ) + ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}) + else(WIN32 AND NOT CYGWIN) + execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${SRC_FILE} ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) + execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${SRC_FILE} ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) + endif(WIN32 AND NOT CYGWIN) endmacro() -# CREATE PKGCONFIG FILES -# we use the same files like ./configure, so we have to set its vars +# libpng is a library so default to 'lib' if(NOT DEFINED CMAKE_INSTALL_LIBDIR) - set(CMAKE_INSTALL_LIBDIR ${CMAKE_INSTALL_PREFIX}/lib) + set(CMAKE_INSTALL_LIBDIR lib) endif(NOT DEFINED CMAKE_INSTALL_LIBDIR) + +# CREATE PKGCONFIG FILES +# we use the same files like ./configure, so we have to set its vars +# Only do this on Windows for Cygwin - the files don't make much sense outside +# a UNIX look alike +if(NOT WIN32 OR CYGWIN) set(prefix ${CMAKE_INSTALL_PREFIX}) set(exec_prefix ${CMAKE_INSTALL_PREFIX}) -set(libdir ${CMAKE_INSTALL_LIBDIR}) +set(libdir ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}) set(includedir ${CMAKE_INSTALL_PREFIX}/include) set(LIBS "-lz -lm") configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY) -_png_generate_symlink_code(PNG_PC_INSTALL_CODE ${PNGLIB_NAME}.pc libpng.pc) -install(CODE ${PNG_PC_INSTALL_CODE}) +CREATE_SYMLINK(${PNGLIB_NAME}.pc libpng.pc) configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY) -_png_generate_symlink_code(PNG_CONFIG_INSTALL_CODE ${PNGLIB_NAME}-config libpng-config) -install(CODE ${PNG_CONFIG_INSTALL_CODE}) +CREATE_SYMLINK(${PNGLIB_NAME}-config libpng-config) +endif(NOT WIN32 OR CYGWIN) # SET UP LINKS if(PNG_SHARED) set_target_properties(${PNG_LIB_NAME} PROPERTIES -# VERSION 14.${PNGLIB_RELEASE}.1.4.4 - VERSION 14.${PNGLIB_RELEASE}.0 - SOVERSION 14 +# VERSION 15.${PNGLIB_RELEASE}.1.5.6 + VERSION 15.${PNGLIB_RELEASE}.0 + SOVERSION 15 CLEAN_DIRECT_OUTPUT 1) endif() if(PNG_STATIC) @@ -277,42 +263,42 @@ if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL ) LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}) - # Create a symlink for libpng.dll.a => libpng14.dll.a on Cygwin + # Create a symlink for libpng.dll.a => libpng15.dll.a on Cygwin if(CYGWIN) - _png_generate_symlink_code(PNG_SHARED_IMPLIB_INSTALL_CODE - ${PNGLIB_NAME}${CMAKE_IMPORT_LIBRARY_SUFFIX} - libpng${CMAKE_IMPORT_LIBRARY_SUFFIX}) - install(CODE ${PNG_SHARED_IMPLIB_INSTALL_CODE}) - install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX} DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif() + get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE}) + get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME) + CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_IMPORT_LIBRARY_SUFFIX}) + install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX} + DESTINATION ${CMAKE_INSTALL_LIBDIR}) + endif(CYGWIN) if(NOT WIN32) - _png_generate_symlink_code(PNG_SHARED_INSTALL_CODE - ${PNGLIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX} - libpng${CMAKE_SHARED_LIBRARY_SUFFIX}) - install(CODE ${PNG_SHARED_INSTALL_CODE}) - install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_SHARED_LIBRARY_SUFFIX} DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif() - endif() + get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE}) + get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME) + CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_SHARED_LIBRARY_SUFFIX}) + install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_SHARED_LIBRARY_SUFFIX} + DESTINATION ${CMAKE_INSTALL_LIBDIR}) + endif(NOT WIN32) + endif(PNG_SHARED) if(PNG_STATIC) install(TARGETS ${PNG_LIB_NAME_STATIC} ${PNG_EXPORT_RULE} - LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} - ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}) + LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} + ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}) if(NOT WIN32 OR CYGWIN) - _png_generate_symlink_code(PNG_STATIC_INSTALL_CODE - ${PNGLIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX} - libpng${CMAKE_STATIC_LIBRARY_SUFFIX}) - install(CODE ${PNG_STATIC_INSTALL_CODE}) - install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_STATIC_LIBRARY_SUFFIX} DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif() - endif() + get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME_STATIC} LOCATION_${CMAKE_BUILD_TYPE}) + get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME) + CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_STATIC_LIBRARY_SUFFIX}) + install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_STATIC_LIBRARY_SUFFIX} + DESTINATION ${CMAKE_INSTALL_LIBDIR}) + endif(NOT WIN32 OR CYGWIN) + endif() endif() if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL ) - install(FILES png.h pngconf.h DESTINATION include) - install(FILES png.h pngconf.h DESTINATION include/${PNGLIB_NAME}) + install(FILES ${libpng_public_hdrs} DESTINATION include) + install(FILES ${libpng_public_hdrs} DESTINATION include/${PNGLIB_NAME}) endif() if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL ) install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin) @@ -343,13 +329,11 @@ if(PNG_EXPORT_RULE AND NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL ) install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake) endif() -# what's with libpng.txt and all the extra files? - +# what's with libpng-$VER%.txt and all the extra files? # UNINSTALL # do we need this? - # DIST # do we need this? diff --git a/src/png/INSTALL b/src/png/INSTALL index 1308db07fe..353bfff326 100644 --- a/src/png/INSTALL +++ b/src/png/INSTALL @@ -1,5 +1,5 @@ -Installing libpng version 1.4.4 - September 23, 2010 +Installing libpng On Unix/Linux and similar systems, you can simply type @@ -13,10 +13,16 @@ If configure does not work on your system and you have a reasonably up-to-date set of tools, running ./autogen.sh before running ./configure may fix the problem. You can also run the individual commands in autogen.sh with the --force option, if supported by your version of -the tools. If you run 'libtoolize --force', though, this will replace -the distributed, patched, version of ltmain.sh with an unpatched version -and your shared library builds may fail to produce libraries with the -correct version numbers. +the tools. To be really sure that you aren't using any of the included +pre-built scripts, you can do this: + + ./configure --enable-maintainer-mode + make maintainer-clean + ./autogen.sh + ./configure [--prefix=/path] [other options] + make + make install + make check Instead, you can use one of the custom-built makefiles in the "scripts" directory @@ -46,8 +52,8 @@ to have access to the zlib.h and zconf.h include files that correspond to the version of zlib that's installed. You can rename the directories that you downloaded (they -might be called "libpng-1.4.4" or "libpng14" and "zlib-1.2.3" -or "zlib123") so that you have directories called "zlib" and "libpng". +might be called "libpng-x.y.z" or "libpngNN" and "zlib-1.2.5" +or "zlib125") so that you have directories called "zlib" and "libpng". Your directory structure should look like this: @@ -60,9 +66,9 @@ Your directory structure should look like this: CMakeLists.txt => "cmake" script configuration files: configure.ac, configure, Makefile.am, Makefile.in, - autogen.sh, config.guess, ltmain.sh, missing, - aclocal.m4, config.h.in, config.sub, - depcomp, install-sh, test-pngtest.sh + autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in, + libpng-config.in, aclocal.m4, config.h.in, config.sub, + depcomp, install-sh, mkinstalldirs, test-pngtest.sh contrib gregbook pngminim @@ -70,14 +76,12 @@ Your directory structure should look like this: pngsuite visupng projects - cbuilder5 (Borland) - visualc6 (msvc) visualc71 vstudio - xcode scripts makefile.* *.def (module definition files) + etc. pngtest.png etc. zlib @@ -108,7 +112,7 @@ scripts directory into this directory, for example Read the makefile to see if you need to change any source or target directories to match your preferences. -Then read pngconf.h to see if you want to make any configuration +Then read pnglibconf.dfa to see if you want to make any configuration changes. Then just run "make" which will create the libpng library in @@ -126,19 +130,6 @@ do that, run "make install" in the zlib directory first if necessary). Some also allow you to run "make test-installed" after you have run "make install". -If you encounter a compiler error message complaining about the -lines - - __png.h__ already includes setjmp.h; - __dont__ include it again.; - -this means you have compiled another module that includes setjmp.h, -which is hazardous because the two modules might not include exactly -the same setjmp.h. If you are sure that you know what you are doing -and that they are exactly the same, then you can comment out or -delete the two lines. Better yet, use the cexcept interface -instead, as demonstrated in contrib/visupng of the libpng distribution. - -Further information can be found in the README and libpng.txt +Further information can be found in the README and libpng-manual.txt files, in the individual makefiles, in png.h, and the manual pages libpng.3 and png.5. diff --git a/src/png/LICENSE b/src/png/LICENSE index 756ebd0457..9294f60d45 100644 --- a/src/png/LICENSE +++ b/src/png/LICENSE @@ -10,8 +10,8 @@ this sentence. This code is released under the libpng license. -libpng versions 1.2.6, August 15, 2004, through 1.4.4, September 23, 2010, are -Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are +libpng versions 1.2.6, August 15, 2004, through 1.5.6, November 3, 2011, are +Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are distributed according to the same disclaimer and license as libpng-1.2.5 with the following individual added to the list of Contributing Authors @@ -108,4 +108,4 @@ certification mark of the Open Source Initiative. Glenn Randers-Pehrson glennrp at users.sourceforge.net -September 23, 2010 +November 3, 2011 diff --git a/src/png/Makefile.am b/src/png/Makefile.am deleted file mode 100644 index 81bbba66ef..0000000000 --- a/src/png/Makefile.am +++ /dev/null @@ -1,132 +0,0 @@ -# Makefile.am: -# Source file for Makefile.in (and hence Makefile) -# - -PNGLIB_BASENAME= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ - -# libpng does not follow GNU file name conventions -AUTOMAKE_OPTIONS = foreign - -# test programs - run on make check, make distcheck -check_PROGRAMS= pngtest -pngtest_SOURCES = pngtest.c -pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la -TESTS = test-pngtest.sh -TESTS_ENVIRONMENT= srcdir=$(srcdir) - -# man pages -dist_man_MANS= libpng.3 libpngpf.3 png.5 - -# generate the -config scripts if required -binconfigs= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config -EXTRA_SCRIPTS= libpng-config libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config -bin_SCRIPTS= @binconfigs@ - -# rules to build libpng, only build the old library on request -lib_LTLIBRARIES=libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la -# EXTRA_LTLIBRARIES= libpng.la -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = png.c pngset.c pngget.c pngrutil.c \ - pngtrans.c pngwutil.c \ - pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \ - pngwtran.c pngmem.c pngerror.c pngpread.c \ - png.h pngconf.h pngpriv.h - -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_CPPFLAGS = @LIBPNG_DEFINES@ - -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS = -no-undefined -export-dynamic \ - -version-number @PNGLIB_MAJOR@@PNGLIB_MINOR@:@PNGLIB_RELEASE@:0 - -if HAVE_LD_VERSION_SCRIPT - # Versioned symbols and restricted exports - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,--version-script=libpng.vers - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.vers -else - # Only restricted exports when possible - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -export-symbols libpng.sym - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.sym -endif - -# Avoid depending upon Character Ranges. -AN = '_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' - -#distribute headers in /usr/include/libpng/* -pkgincludedir= $(includedir)/$(PNGLIB_BASENAME) -pkginclude_HEADERS= png.h pngconf.h - -# pkg-config stuff, note that libpng.pc is always required in order -# to get the correct library -pkgconfigdir = @pkgconfigdir@ -pkgconfig_DATA = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc - -#extra source distribution files. -EXTRA_DIST= \ - ANNOUNCE CHANGES INSTALL LICENSE README TODO \ - pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \ - ${srcdir}/projects/visualc6/* \ - ${srcdir}/projects/visualc71/* \ - ${srcdir}/projects/xcode/* \ - ${srcdir}/scripts/* \ - ${srcdir}/contrib/gregbook/* \ - ${srcdir}/contrib/pngminim/* \ - ${srcdir}/contrib/pngminus/* \ - ${srcdir}/contrib/pngsuite/* \ - ${srcdir}/contrib/visupng/* \ - $(TESTS) \ - example.c libpng-*.txt - -CLEANFILES= pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers \ -libpng.sym - -MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \ -config.sub configure depcomp install-sh ltmain.sh missing - -$(PNGLIB_BASENAME).pc: libpng.pc - cp libpng.pc $@ - -$(PNGLIB_BASENAME)-config: libpng-config - 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-# do evil things to libpng to cause libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ to be used -install-exec-hook: - cd $(DESTDIR)$(bindir); rm -f libpng-config - cd $(DESTDIR)$(bindir); $(LN_S) $(PNGLIB_BASENAME)-config libpng-config - @set -x;\ - cd $(DESTDIR)$(libdir);\ - for ext in a la so so.@PNGLIB_MAJOR@@PNGLIB_MINOR@.@PNGLIB_RELEASE@ sl dylib dll.a; do\ - rm -f libpng.$$ext;\ - if test -f $(PNGLIB_BASENAME).$$ext; then\ - $(LN_S) $(PNGLIB_BASENAME).$$ext libpng.$$ext;\ - fi;\ - done - -uninstall-hook: - cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h - rm -f $(DESTDIR)$(pkgconfigdir)/libpng.pc - rm -f $(DESTDIR)$(bindir)/libpng-config - -# Tell versions [3.59,3.63) of GNU make to not export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/src/png/README b/src/png/README index 255378bc9a..e8963a5164 100644 --- a/src/png/README +++ b/src/png/README @@ -1,4 +1,4 @@ -README for libpng version 1.4.4 - September 23, 2010 (shared library 14.0) +README for libpng version 1.5.6 - November 3, 2011 (shared library 15.0) See the note about version numbers near the top of png.h See INSTALL for instructions on how to install libpng. @@ -58,7 +58,7 @@ on the PNG-implement mailing list and not on material submitted privately to Guy, Andreas, or Glenn. They will forward any good suggestions to the list. -For a detailed description on using libpng, read libpng.txt. For +For a detailed description on using libpng, read libpng-manual.txt. For examples of libpng in a program, see example.c and pngtest.c. For usage information and restrictions (what little they are) on libpng, see png.h. For a description on using zlib (the compression library used by @@ -114,19 +114,16 @@ given in previous versions of this document. He and Andreas will read mail addressed to the png-implement list, however. Please do not send general questions about PNG. Send them to -the (png-list at ccrc.wustl.edu, subscription required, write to -majordomo at ccrc.wustl.edu with "subscribe png-list" in your message). -On the other hand, -please do not send libpng questions to that address, send them to me -or to the png-implement list. I'll -get them in the end anyway. If you have a question about something +png-mng-misc at lists.sf.net (subscription required; visit +https://lists.sourceforge.net/lists/listinfo/png-mng-misc to +subscribe). If you have a question about something in the PNG specification that is related to using libpng, send it to me. Send me any questions that start with "I was using libpng, and ...". If in doubt, send questions to me. I'll bounce them to others, if necessary. Please do not send suggestions on how to change PNG. We have -been discussing PNG for nine years now, and it is official and +been discussing PNG for sixteen years now, and it is official and finished. If you have suggestions for libpng, however, I'll gladly listen. Even if your suggestion is not used immediately, it may be used later. @@ -141,13 +138,17 @@ Files in this distribution: TODO => Things not implemented in the current library Y2KINFO => Statement of Y2K compliance example.c => Example code for using libpng functions - libpng.3 => manual page for libpng (includes libpng.txt) - libpng.txt => Description of libpng and its functions + libpng.3 => manual page for libpng (includes libpng-manual.txt) + libpng-manual.txt => Description of libpng and its functions libpngpf.3 => manual page for libpng's private functions png.5 => manual page for the PNG format png.c => Basic interface functions common to library - png.h => Library function and interface declarations - pngconf.h => System specific library configuration + png.h => Library function and interface declarations (public) + pngpriv.h => Library function and interface declarations (private) + pngconf.h => System specific library configuration (public) + pngstruct.h => png_struct declaration (private) + pnginfo.h => png_info struct declaration (private) + pngdebug.h => debugging macros (private) pngerror.c => Error/warning message I/O functions pngget.c => Functions for retrieving info from struct pngmem.c => Memory handling functions @@ -176,72 +177,16 @@ Files in this distribution: visupng => Contains a MSVC workspace for VisualPng projects => Contains project files and workspaces for building a DLL - c5builder => Contains a Borland workspace for building + cbuilder5 => Contains a Borland workspace for building libpng and zlib visualc6 => Contains a Microsoft Visual C++ (MSVC) workspace for building libpng and zlib + visualc71 => Contains a Microsoft Visual C++ (MSVC) + workspace for building libpng and zlib + xcode => Contains an Apple xcode + workspace for building libpng and zlib scripts => Directory containing scripts for building libpng: - descrip.mms => VMS makefile for MMS or MMK - makefile.std => Generic UNIX makefile (cc, creates static - libpng.a) - makefile.elf => Linux/ELF makefile symbol versioning, - (gcc, creates libpng14.so.14.1.4.4) - makefile.linux => Linux/ELF makefile - (gcc, creates libpng14.so.14.1.4.4) - makefile.gcc => Generic makefile (gcc, creates static libpng.a) - makefile.knr => Archaic UNIX Makefile that converts files with - ansi2knr (Requires ansi2knr.c from - ftp://ftp.cs.wisc.edu/ghost) - makefile.aix => AIX makefile - makefile.cygwin => Cygwin/gcc makefile - makefile.darwin => Darwin makefile - makefile.dec => DEC Alpha UNIX makefile - makefile.freebsd => FreeBSD makefile - makefile.hpgcc => HPUX makefile using gcc - makefile.hpux => HPUX (10.20 and 11.00) makefile - makefile.hp64 => HPUX (10.20 and 11.00) makefile, 64 bit - makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static) - makefile.intel => Intel C/C++ version 4.0 and later - makefile.mingw => Mingw/gcc makefile - makefile.netbsd => NetBSD/cc makefile, makes libpng.so. - makefile.ne14bsd => NetBSD/cc makefile, makes - libpng14.so - makefile.openbsd => OpenBSD makefile - makefile.sgi => Silicon Graphics IRIX (cc, creates static lib) - makefile.sggcc => Silicon Graphics - (gcc, creates libpng14.so.14.1.4.4) - makefile.sunos => Sun makefile - makefile.solaris => Solaris 2.X makefile - (gcc, creates libpng14.so.14.1.4.4) - makefile.so9 => Solaris 9 makefile - (gcc, creates libpng14.so.14.1.4.4) - makefile.32sunu => Sun Ultra 32-bit makefile - makefile.64sunu => Sun Ultra 64-bit makefile - makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc - makefile.mips => MIPS makefile - makefile.acorn => Acorn makefile - makefile.amiga => Amiga makefile - smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC - compiler (Requires SCOPTIONS, copied from - scripts/SCOPTIONS.ppc) - makefile.atari => Atari makefile - makefile.beos => BEOS makefile for X86 - makefile.bor => Borland makefile (uses bcc) - makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode) - makefile.tc3 => Turbo C 3.0 makefile - makefile.dj2 => DJGPP 2 makefile - makefile.msc => Microsoft C makefile - makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and - later (does not use assembler code) - makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def) - png32ce.def => module definition for makefile.cegccg - pngos2.def => OS/2 module definition file used by - makefile.os2 - pngwin.def => module definition file used by - makefile.cygwin and makefile.mingw - makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model - makevms.com => VMS build script - SCOPTIONS.ppc => Used with smakefile.ppc + (see scripts/README.txt for the list of scripts) Good luck, and happy coding. diff --git a/src/png/TODO b/src/png/TODO index 0af8d827a4..6e1f028bd7 100644 --- a/src/png/TODO +++ b/src/png/TODO @@ -2,14 +2,12 @@ TODO - list of things to do for libpng: Final bug fixes. -Improve API by hiding the png_struct and png_info structs. -Finish work on the no-floating-point version (including gamma compensation) Better C++ wrapper/full C++ implementation? Fix problem with C++ and EXTERN "C". cHRM transformation. -Improve setjmp/longjmp usage or remove it in favor of returning error codes. +Remove setjmp/longjmp usage in favor of returning error codes. Add "grayscale->palette" transformation and "palette->grayscale" detection. -Improved quantizing and dithering. +Improved dithering. Multi-lingual error and warning message support. Complete sRGB transformation (presently it simply uses gamma=0.45455). Man pages for function calls. @@ -18,14 +16,12 @@ Better filter selection (counting huffman bits/precompression? filter inertia? filter costs?). Histogram creation. Text conversion between different code pages (Latin-1 -> Mac and DOS). -Build gamma tables using fixed point (and do away with floating point entirely). Avoid building gamma tables whenever possible. Use greater precision when changing to linear gamma for compositing against background and doing rgb-to-gray transformation. Investigate pre-incremented loop counters and other loop constructions. Add interpolated method of handling interlacing. -Provide for conditional compilation of 16-bit support (except for the - initial stripping down to 8-bits when reading a 16-bit PNG datastream). Switch to the simpler zlib (zlib/libpng) license if legally possible. +Extend pngvalid.c to validate more of the libpng transformations. */ diff --git a/src/png/aclocal.m4 b/src/png/aclocal.m4 deleted file mode 100644 index 30b5d2b112..0000000000 --- a/src/png/aclocal.m4 +++ /dev/null @@ -1,9036 +0,0 @@ -# generated automatically by aclocal 1.11.1 -*- Autoconf -*- - -# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, -# 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY, to the extent permitted by law; without -# even the implied warranty of MERCHANTABILITY or FITNESS FOR A -# PARTICULAR PURPOSE. - -m4_ifndef([AC_AUTOCONF_VERSION], - [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl -m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.65],, -[m4_warning([this file was generated for autoconf 2.65. -You have another version of autoconf. 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-void nm_test_func(void); -void nm_test_func(void){} -#ifdef __cplusplus -} -#endif -int main(){nm_test_var='a';nm_test_func();return(0);} -_LT_EOF - - if AC_TRY_EVAL(ac_compile); then - # Now try to grab the symbols. - nlist=conftest.nm - if AC_TRY_EVAL(NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) && test -s "$nlist"; then - # Try sorting and uniquifying the output. - if sort "$nlist" | uniq > "$nlist"T; then - mv -f "$nlist"T "$nlist" - else - rm -f "$nlist"T - fi - - # Make sure that we snagged all the symbols we need. - if $GREP ' nm_test_var$' "$nlist" >/dev/null; then - if $GREP ' nm_test_func$' "$nlist" >/dev/null; then - cat <<_LT_EOF > conftest.$ac_ext -#ifdef __cplusplus -extern "C" { -#endif - -_LT_EOF - # Now generate the symbol file. - eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext' - - cat <<_LT_EOF >> conftest.$ac_ext - -/* The mapping between symbol names and symbols. */ -const struct { - const char *name; - void *address; -} -lt__PROGRAM__LTX_preloaded_symbols[[]] = -{ - { "@PROGRAM@", (void *) 0 }, -_LT_EOF - $SED "s/^$symcode$symcode* \(.*\) \(.*\)$/ {\"\2\", (void *) \&\2},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext - cat <<\_LT_EOF >> conftest.$ac_ext - {0, (void *) 0} -}; - -/* This works around a problem in FreeBSD linker */ -#ifdef FREEBSD_WORKAROUND -static const void *lt_preloaded_setup() { - return lt__PROGRAM__LTX_preloaded_symbols; -} -#endif - -#ifdef __cplusplus -} -#endif -_LT_EOF - # Now try linking the two files. - mv conftest.$ac_objext conftstm.$ac_objext - lt_save_LIBS="$LIBS" - lt_save_CFLAGS="$CFLAGS" - LIBS="conftstm.$ac_objext" - CFLAGS="$CFLAGS$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)" - if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext}; then - pipe_works=yes - fi - LIBS="$lt_save_LIBS" - CFLAGS="$lt_save_CFLAGS" - else - echo "cannot find nm_test_func in $nlist" >&AS_MESSAGE_LOG_FD - fi - else - echo "cannot find nm_test_var in $nlist" >&AS_MESSAGE_LOG_FD - fi - else - echo "cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD - fi - else - echo "$progname: failed program was:" >&AS_MESSAGE_LOG_FD - cat conftest.$ac_ext >&5 - fi - rm -rf conftest* conftst* - - # Do not use the global_symbol_pipe unless it works. - if test "$pipe_works" = yes; then - break - else - lt_cv_sys_global_symbol_pipe= - fi -done -]) -if test -z "$lt_cv_sys_global_symbol_pipe"; then - lt_cv_sys_global_symbol_to_cdecl= -fi -if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then - AC_MSG_RESULT(failed) -else - AC_MSG_RESULT(ok) -fi - -_LT_DECL([global_symbol_pipe], [lt_cv_sys_global_symbol_pipe], [1], - [Take the output of nm and produce a listing of raw symbols and C names]) -_LT_DECL([global_symbol_to_cdecl], [lt_cv_sys_global_symbol_to_cdecl], [1], - [Transform the output of nm in a proper C declaration]) -_LT_DECL([global_symbol_to_c_name_address], - [lt_cv_sys_global_symbol_to_c_name_address], [1], - [Transform the output of nm in a C name address pair]) -_LT_DECL([global_symbol_to_c_name_address_lib_prefix], - [lt_cv_sys_global_symbol_to_c_name_address_lib_prefix], [1], - [Transform the output of nm in a C name address pair when lib prefix is needed]) -]) # _LT_CMD_GLOBAL_SYMBOLS - - -# _LT_COMPILER_PIC([TAGNAME]) -# --------------------------- -m4_defun([_LT_COMPILER_PIC], -[m4_require([_LT_TAG_COMPILER])dnl -_LT_TAGVAR(lt_prog_compiler_wl, $1)= -_LT_TAGVAR(lt_prog_compiler_pic, $1)= -_LT_TAGVAR(lt_prog_compiler_static, $1)= - -AC_MSG_CHECKING([for $compiler option to produce PIC]) -m4_if([$1], [CXX], [ - # C++ specific cases for pic, static, wl, etc. - if test "$GXX" = yes; then - _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' - _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' - - case $host_os in - aix*) - # All AIX code is PIC. - if test "$host_cpu" = ia64; then - # AIX 5 now supports IA64 processor - _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' - fi - ;; - - amigaos*) - case $host_cpu in - powerpc) - # see comment about AmigaOS4 .so support - _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' - ;; - m68k) - # FIXME: we need at least 68020 code to build shared libraries, but - # adding the `-m68020' flag to GCC prevents building anything better, - # like `-m68040'. - _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4' - ;; - esac - ;; - - beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*) - # PIC is the default for these OSes. - ;; - mingw* | cygwin* | os2* | pw32* | cegcc*) - # This hack is so that the source file can tell whether it is being - # built for inclusion in a dll (and should export symbols for example). - # Although the cygwin gcc ignores -fPIC, still need this for old-style - # (--disable-auto-import) libraries - m4_if([$1], [GCJ], [], - [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) - ;; 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It appears that all Alpha - # Linux and Compaq Tru64 Unix objects are PIC. - _LT_TAGVAR(lt_prog_compiler_pic, $1)= - _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' - ;; - xlc* | xlC* | bgxl[[cC]]* | mpixl[[cC]]*) - # IBM XL 8.0, 9.0 on PPC and BlueGene - _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' - _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic' - _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink' - ;; - *) - case `$CC -V 2>&1 | sed 5q` in - *Sun\ C*) - # Sun C++ 5.9 - _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' - _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' - _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' - ;; - esac - ;; - esac - ;; - lynxos*) - ;; - m88k*) - ;; - mvs*) - case $cc_basename in - cxx*) - _LT_TAGVAR(lt_prog_compiler_pic, $1)='-W c,exportall' - ;; - *) - ;; - esac - ;; - netbsd*) - ;; - *qnx* | *nto*) - # QNX uses GNU C++, but need to define -shared option too, otherwise - # it will coredump. - _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' - ;; - osf3* | osf4* | osf5*) - case $cc_basename in - KCC*) - _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,' - ;; - RCC*) - # Rational C++ 2.4.1 - _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' - ;; - cxx*) - # Digital/Compaq C++ - _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' - # Make sure the PIC flag is empty. 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- Motorola:*:4.3:PL8-*) - echo powerpc-harris-powermax - exit ;; - Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*) - echo powerpc-harris-powermax - exit ;; - Night_Hawk:Power_UNIX:*:*) - echo powerpc-harris-powerunix - exit ;; - m88k:CX/UX:7*:*) - echo m88k-harris-cxux7 - exit ;; - m88k:*:4*:R4*) - echo m88k-motorola-sysv4 - exit ;; - m88k:*:3*:R3*) - echo m88k-motorola-sysv3 - exit ;; - AViiON:dgux:*:*) - # DG/UX returns AViiON for all architectures - UNAME_PROCESSOR=`/usr/bin/uname -p` - if [ $UNAME_PROCESSOR = mc88100 ] || [ $UNAME_PROCESSOR = mc88110 ] - then - if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx ] || \ - [ ${TARGET_BINARY_INTERFACE}x = x ] - then - echo m88k-dg-dgux${UNAME_RELEASE} - else - echo m88k-dg-dguxbcs${UNAME_RELEASE} - fi - else - echo i586-dg-dgux${UNAME_RELEASE} - fi - exit ;; - M88*:DolphinOS:*:*) # DolphinOS (SVR3) - echo m88k-dolphin-sysv3 - exit ;; - M88*:*:R3*:*) - # Delta 88k system running SVR3 - echo m88k-motorola-sysv3 - exit ;; - XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3) - echo m88k-tektronix-sysv3 - exit ;; - Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD) - echo m68k-tektronix-bsd - exit ;; - *:IRIX*:*:*) - echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'` - exit ;; - ????????:AIX?:[12].1:2) # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX. - echo romp-ibm-aix # uname -m gives an 8 hex-code CPU id - exit ;; # Note that: echo "'`uname -s`'" gives 'AIX ' - i*86:AIX:*:*) - echo i386-ibm-aix - exit ;; - ia64:AIX:*:*) - if [ -x /usr/bin/oslevel ] ; then - IBM_REV=`/usr/bin/oslevel` - else - IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE} - fi - echo ${UNAME_MACHINE}-ibm-aix${IBM_REV} - exit ;; - *:AIX:2:3) - if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #include - - main() - { - if (!__power_pc()) - exit(1); - puts("powerpc-ibm-aix3.2.5"); - exit(0); - } -EOF - if $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` - then - echo "$SYSTEM_NAME" - else - echo rs6000-ibm-aix3.2.5 - fi - elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then - echo rs6000-ibm-aix3.2.4 - else - echo rs6000-ibm-aix3.2 - fi - exit ;; - *:AIX:*:[4567]) - IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'` - if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then - IBM_ARCH=rs6000 - else - IBM_ARCH=powerpc - fi - if [ -x /usr/bin/oslevel ] ; then - IBM_REV=`/usr/bin/oslevel` - else - IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE} - fi - echo ${IBM_ARCH}-ibm-aix${IBM_REV} - exit ;; - *:AIX:*:*) - echo rs6000-ibm-aix - exit ;; - ibmrt:4.4BSD:*|romp-ibm:BSD:*) - echo romp-ibm-bsd4.4 - exit ;; - ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC BSD and - echo romp-ibm-bsd${UNAME_RELEASE} # 4.3 with uname added to - exit ;; # report: romp-ibm BSD 4.3 - *:BOSX:*:*) - echo rs6000-bull-bosx - exit ;; - DPX/2?00:B.O.S.:*:*) - echo m68k-bull-sysv3 - exit ;; - 9000/[34]??:4.3bsd:1.*:*) - echo m68k-hp-bsd - exit ;; - hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*) - echo m68k-hp-bsd4.4 - exit ;; - 9000/[34678]??:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - case "${UNAME_MACHINE}" in - 9000/31? ) HP_ARCH=m68000 ;; - 9000/[34]?? ) HP_ARCH=m68k ;; - 9000/[678][0-9][0-9]) - if [ -x /usr/bin/getconf ]; then - sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null` - sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null` - case "${sc_cpu_version}" in - 523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0 - 528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1 - 532) # CPU_PA_RISC2_0 - case "${sc_kernel_bits}" in - 32) HP_ARCH="hppa2.0n" ;; - 64) HP_ARCH="hppa2.0w" ;; - '') HP_ARCH="hppa2.0" ;; # HP-UX 10.20 - esac ;; - esac - fi - if [ "${HP_ARCH}" = "" ]; then - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - - #define _HPUX_SOURCE - #include - #include - - int main () - { - #if defined(_SC_KERNEL_BITS) - long bits = sysconf(_SC_KERNEL_BITS); - #endif - long cpu = sysconf (_SC_CPU_VERSION); - - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1"); break; - case CPU_PA_RISC2_0: - #if defined(_SC_KERNEL_BITS) - switch (bits) - { - case 64: puts ("hppa2.0w"); break; - case 32: puts ("hppa2.0n"); break; - default: puts ("hppa2.0"); break; - } break; - #else /* !defined(_SC_KERNEL_BITS) */ - puts ("hppa2.0"); break; - #endif - default: puts ("hppa1.0"); break; - } - exit (0); - } -EOF - (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy` - test -z "$HP_ARCH" && HP_ARCH=hppa - fi ;; - esac - if [ ${HP_ARCH} = "hppa2.0w" ] - then - eval $set_cc_for_build - - # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating - # 32-bit code. hppa64-hp-hpux* has the same kernel and a compiler - # generating 64-bit code. GNU and HP use different nomenclature: - # - # $ CC_FOR_BUILD=cc ./config.guess - # => hppa2.0w-hp-hpux11.23 - # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess - # => hppa64-hp-hpux11.23 - - if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | - grep -q __LP64__ - then - HP_ARCH="hppa2.0w" - else - HP_ARCH="hppa64" - fi - fi - echo ${HP_ARCH}-hp-hpux${HPUX_REV} - exit ;; - ia64:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - echo ia64-hp-hpux${HPUX_REV} - exit ;; - 3050*:HI-UX:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #include - int - main () - { - long cpu = sysconf (_SC_CPU_VERSION); - /* The order matters, because CPU_IS_HP_MC68K erroneously returns - true for CPU_PA_RISC1_0. CPU_IS_PA_RISC returns correct - results, however. */ - if (CPU_IS_PA_RISC (cpu)) - { - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break; - case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break; - default: puts ("hppa-hitachi-hiuxwe2"); break; - } - } - else if (CPU_IS_HP_MC68K (cpu)) - puts ("m68k-hitachi-hiuxwe2"); - else puts ("unknown-hitachi-hiuxwe2"); - exit (0); - } -EOF - $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` && - { echo "$SYSTEM_NAME"; exit; } - echo unknown-hitachi-hiuxwe2 - exit ;; - 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* ) - echo hppa1.1-hp-bsd - exit ;; - 9000/8??:4.3bsd:*:*) - echo hppa1.0-hp-bsd - exit ;; - *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*) - echo hppa1.0-hp-mpeix - exit ;; - hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* ) - echo hppa1.1-hp-osf - exit ;; - hp8??:OSF1:*:*) - echo hppa1.0-hp-osf - exit ;; - i*86:OSF1:*:*) - if [ -x /usr/sbin/sysversion ] ; then - echo ${UNAME_MACHINE}-unknown-osf1mk - else - echo ${UNAME_MACHINE}-unknown-osf1 - fi - exit ;; - parisc*:Lites*:*:*) - echo hppa1.1-hp-lites - exit ;; - C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*) - echo c1-convex-bsd - exit ;; - C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*) - if getsysinfo -f scalar_acc - then echo c32-convex-bsd - else echo c2-convex-bsd - fi - exit ;; - C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*) - echo c34-convex-bsd - exit ;; - C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*) - echo c38-convex-bsd - exit ;; - C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*) - echo c4-convex-bsd - exit ;; - CRAY*Y-MP:*:*:*) - echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*[A-Z]90:*:*:*) - echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \ - | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \ - -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \ - -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*TS:*:*:*) - echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*T3E:*:*:*) - echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*SV1:*:*:*) - echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - *:UNICOS/mp:*:*) - echo craynv-cray-unicosmp${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*) - FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'` - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'` - echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; - 5000:UNIX_System_V:4.*:*) - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/ /_/'` - echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; - i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*) - echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE} - exit ;; - sparc*:BSD/OS:*:*) - echo sparc-unknown-bsdi${UNAME_RELEASE} - exit ;; - *:BSD/OS:*:*) - echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE} - exit ;; - *:FreeBSD:*:*) - case ${UNAME_MACHINE} in - pc98) - echo i386-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - amd64) - echo x86_64-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - *) - echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - esac - exit ;; - i*:CYGWIN*:*) - echo ${UNAME_MACHINE}-pc-cygwin - exit ;; - *:MINGW*:*) - echo ${UNAME_MACHINE}-pc-mingw32 - exit ;; - i*:windows32*:*) - # uname -m includes "-pc" on this system. - echo ${UNAME_MACHINE}-mingw32 - exit ;; - i*:PW*:*) - echo ${UNAME_MACHINE}-pc-pw32 - exit ;; - *:Interix*:*) - case ${UNAME_MACHINE} in - x86) - echo i586-pc-interix${UNAME_RELEASE} - exit ;; - authenticamd | genuineintel | EM64T) - echo x86_64-unknown-interix${UNAME_RELEASE} - exit ;; - IA64) - echo ia64-unknown-interix${UNAME_RELEASE} - exit ;; - esac ;; - [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*) - echo i${UNAME_MACHINE}-pc-mks - exit ;; - 8664:Windows_NT:*) - echo x86_64-pc-mks - exit ;; - i*:Windows_NT*:* | Pentium*:Windows_NT*:*) - # How do we know it's Interix rather than the generic POSIX subsystem? - # It also conflicts with pre-2.0 versions of AT&T UWIN. Should we - # UNAME_MACHINE based on the output of uname instead of i386? - echo i586-pc-interix - exit ;; - i*:UWIN*:*) - echo ${UNAME_MACHINE}-pc-uwin - exit ;; - amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*) - echo x86_64-unknown-cygwin - exit ;; - p*:CYGWIN*:*) - echo powerpcle-unknown-cygwin - exit ;; - prep*:SunOS:5.*:*) - echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; - *:GNU:*:*) - # the GNU system - echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'` - exit ;; - *:GNU/*:*:*) - # other systems with GNU libc and userland - echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-gnu - exit ;; - i*86:Minix:*:*) - echo ${UNAME_MACHINE}-pc-minix - exit ;; - alpha:Linux:*:*) - case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in - EV5) UNAME_MACHINE=alphaev5 ;; - EV56) UNAME_MACHINE=alphaev56 ;; - PCA56) UNAME_MACHINE=alphapca56 ;; - PCA57) UNAME_MACHINE=alphapca56 ;; - EV6) UNAME_MACHINE=alphaev6 ;; - EV67) UNAME_MACHINE=alphaev67 ;; - EV68*) UNAME_MACHINE=alphaev68 ;; - esac - objdump --private-headers /bin/sh | grep -q ld.so.1 - if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi - echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC} - exit ;; - arm*:Linux:*:*) - eval $set_cc_for_build - if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \ - | grep -q __ARM_EABI__ - then - echo ${UNAME_MACHINE}-unknown-linux-gnu - else - echo ${UNAME_MACHINE}-unknown-linux-gnueabi - fi - exit ;; - avr32*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - cris:Linux:*:*) - echo cris-axis-linux-gnu - exit ;; - crisv32:Linux:*:*) - echo crisv32-axis-linux-gnu - exit ;; - frv:Linux:*:*) - echo frv-unknown-linux-gnu - exit ;; - i*86:Linux:*:*) - LIBC=gnu - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #ifdef __dietlibc__ - LIBC=dietlibc - #endif -EOF - eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC'` - echo "${UNAME_MACHINE}-pc-linux-${LIBC}" - exit ;; - ia64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - m32r*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - m68*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - mips:Linux:*:* | mips64:Linux:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #undef CPU - #undef ${UNAME_MACHINE} - #undef ${UNAME_MACHINE}el - #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) - CPU=${UNAME_MACHINE}el - #else - #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) - CPU=${UNAME_MACHINE} - #else - CPU= - #endif - #endif -EOF - eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'` - test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; } - ;; - or32:Linux:*:*) - echo or32-unknown-linux-gnu - exit ;; - padre:Linux:*:*) - echo sparc-unknown-linux-gnu - exit ;; - parisc64:Linux:*:* | hppa64:Linux:*:*) - echo hppa64-unknown-linux-gnu - exit ;; - parisc:Linux:*:* | hppa:Linux:*:*) - # Look for CPU level - case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in - PA7*) echo hppa1.1-unknown-linux-gnu ;; - PA8*) echo hppa2.0-unknown-linux-gnu ;; - *) echo hppa-unknown-linux-gnu ;; - esac - exit ;; - ppc64:Linux:*:*) - echo powerpc64-unknown-linux-gnu - exit ;; - ppc:Linux:*:*) - echo powerpc-unknown-linux-gnu - exit ;; - s390:Linux:*:* | s390x:Linux:*:*) - echo ${UNAME_MACHINE}-ibm-linux - exit ;; - sh64*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - sh*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - sparc:Linux:*:* | sparc64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - tile*:Linux:*:*) - echo ${UNAME_MACHINE}-tilera-linux-gnu - exit ;; - vax:Linux:*:*) - echo ${UNAME_MACHINE}-dec-linux-gnu - exit ;; - x86_64:Linux:*:*) - echo x86_64-unknown-linux-gnu - exit ;; - xtensa*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - i*86:DYNIX/ptx:4*:*) - # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. - # earlier versions are messed up and put the nodename in both - # sysname and nodename. - echo i386-sequent-sysv4 - exit ;; - i*86:UNIX_SV:4.2MP:2.*) - # Unixware is an offshoot of SVR4, but it has its own version - # number series starting with 2... - # I am not positive that other SVR4 systems won't match this, - # I just have to hope. -- rms. - # Use sysv4.2uw... so that sysv4* matches it. - echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION} - exit ;; - i*86:OS/2:*:*) - # If we were able to find `uname', then EMX Unix compatibility - # is probably installed. - echo ${UNAME_MACHINE}-pc-os2-emx - exit ;; - i*86:XTS-300:*:STOP) - echo ${UNAME_MACHINE}-unknown-stop - exit ;; - i*86:atheos:*:*) - echo ${UNAME_MACHINE}-unknown-atheos - exit ;; - i*86:syllable:*:*) - echo ${UNAME_MACHINE}-pc-syllable - exit ;; - i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*) - echo i386-unknown-lynxos${UNAME_RELEASE} - exit ;; - i*86:*DOS:*:*) - echo ${UNAME_MACHINE}-pc-msdosdjgpp - exit ;; - i*86:*:4.*:* | i*86:SYSTEM_V:4.*:*) - UNAME_REL=`echo ${UNAME_RELEASE} | sed 's/\/MP$//'` - if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then - echo ${UNAME_MACHINE}-univel-sysv${UNAME_REL} - else - echo ${UNAME_MACHINE}-pc-sysv${UNAME_REL} - fi - exit ;; - i*86:*:5:[678]*) - # UnixWare 7.x, OpenUNIX and OpenServer 6. - case `/bin/uname -X | grep "^Machine"` in - *486*) UNAME_MACHINE=i486 ;; - *Pentium) UNAME_MACHINE=i586 ;; - *Pent*|*Celeron) UNAME_MACHINE=i686 ;; - esac - echo ${UNAME_MACHINE}-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION} - exit ;; - i*86:*:3.2:*) - if test -f /usr/options/cb.name; then - UNAME_REL=`sed -n 's/.*Version //p' /dev/null >/dev/null ; then - UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')` - (/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486 - (/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \ - && UNAME_MACHINE=i586 - (/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \ - && UNAME_MACHINE=i686 - (/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \ - && UNAME_MACHINE=i686 - echo ${UNAME_MACHINE}-pc-sco$UNAME_REL - else - echo ${UNAME_MACHINE}-pc-sysv32 - fi - exit ;; 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exit; } ;; - 3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0) - OS_REL='' - test -r /etc/.relid \ - && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` - /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4.3${OS_REL}; exit; } - /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;; - 3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*) - /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4; exit; } ;; - NCR*:*:4.2:* | MPRAS*:*:4.2:*) - OS_REL='.3' - test -r /etc/.relid \ - && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` - /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4.3${OS_REL}; exit; } - /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } - /bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;; - m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*) - echo m68k-unknown-lynxos${UNAME_RELEASE} - exit ;; - mc68030:UNIX_System_V:4.*:*) - echo m68k-atari-sysv4 - exit ;; - TSUNAMI:LynxOS:2.*:*) - echo sparc-unknown-lynxos${UNAME_RELEASE} - exit ;; - rs6000:LynxOS:2.*:*) - echo rs6000-unknown-lynxos${UNAME_RELEASE} - exit ;; - PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*) - echo powerpc-unknown-lynxos${UNAME_RELEASE} - exit ;; - SM[BE]S:UNIX_SV:*:*) - echo mips-dde-sysv${UNAME_RELEASE} - exit ;; - RM*:ReliantUNIX-*:*:*) - echo mips-sni-sysv4 - exit ;; - RM*:SINIX-*:*:*) - echo mips-sni-sysv4 - exit ;; - *:SINIX-*:*:*) - if uname -p 2>/dev/null >/dev/null ; then - UNAME_MACHINE=`(uname -p) 2>/dev/null` - echo ${UNAME_MACHINE}-sni-sysv4 - else - echo ns32k-sni-sysv - fi - exit ;; - PENTIUM:*:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort - # says - echo i586-unisys-sysv4 - exit ;; - *:UNIX_System_V:4*:FTX*) - # From Gerald Hewes . - # How about differentiating between stratus architectures? -djm - echo hppa1.1-stratus-sysv4 - exit ;; - *:*:*:FTX*) - # From seanf@swdc.stratus.com. - echo i860-stratus-sysv4 - exit ;; - i*86:VOS:*:*) - # From Paul.Green@stratus.com. - echo ${UNAME_MACHINE}-stratus-vos - exit ;; - *:VOS:*:*) - # From Paul.Green@stratus.com. - echo hppa1.1-stratus-vos - exit ;; - mc68*:A/UX:*:*) - echo m68k-apple-aux${UNAME_RELEASE} - exit ;; - news*:NEWS-OS:6*:*) - echo mips-sony-newsos6 - exit ;; - R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*) - if [ -d /usr/nec ]; then - echo mips-nec-sysv${UNAME_RELEASE} - else - echo mips-unknown-sysv${UNAME_RELEASE} - fi - exit ;; - BeBox:BeOS:*:*) # BeOS running on hardware made by Be, PPC only. - echo powerpc-be-beos - exit ;; - BeMac:BeOS:*:*) # BeOS running on Mac or Mac clone, PPC only. - echo powerpc-apple-beos - exit ;; - BePC:BeOS:*:*) # BeOS running on Intel PC compatible. - echo i586-pc-beos - exit ;; - BePC:Haiku:*:*) # Haiku running on Intel PC compatible. - echo i586-pc-haiku - exit ;; - SX-4:SUPER-UX:*:*) - echo sx4-nec-superux${UNAME_RELEASE} - exit ;; - SX-5:SUPER-UX:*:*) - echo sx5-nec-superux${UNAME_RELEASE} - exit ;; - SX-6:SUPER-UX:*:*) - echo sx6-nec-superux${UNAME_RELEASE} - exit ;; - SX-7:SUPER-UX:*:*) - echo sx7-nec-superux${UNAME_RELEASE} - exit ;; - SX-8:SUPER-UX:*:*) - echo sx8-nec-superux${UNAME_RELEASE} - exit ;; - SX-8R:SUPER-UX:*:*) - echo sx8r-nec-superux${UNAME_RELEASE} - exit ;; - Power*:Rhapsody:*:*) - echo powerpc-apple-rhapsody${UNAME_RELEASE} - exit ;; - *:Rhapsody:*:*) - echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE} - exit ;; - *:Darwin:*:*) - UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown - case $UNAME_PROCESSOR in - i386) - eval $set_cc_for_build - if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then - if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \ - (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \ - grep IS_64BIT_ARCH >/dev/null - then - UNAME_PROCESSOR="x86_64" - fi - fi ;; - unknown) UNAME_PROCESSOR=powerpc ;; - esac - echo ${UNAME_PROCESSOR}-apple-darwin${UNAME_RELEASE} - exit ;; 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- *:TOPS-10:*:*) - echo pdp10-unknown-tops10 - exit ;; - *:TENEX:*:*) - echo pdp10-unknown-tenex - exit ;; - KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*) - echo pdp10-dec-tops20 - exit ;; - XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*) - echo pdp10-xkl-tops20 - exit ;; - *:TOPS-20:*:*) - echo pdp10-unknown-tops20 - exit ;; - *:ITS:*:*) - echo pdp10-unknown-its - exit ;; - SEI:*:*:SEIUX) - echo mips-sei-seiux${UNAME_RELEASE} - exit ;; - *:DragonFly:*:*) - echo ${UNAME_MACHINE}-unknown-dragonfly`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` - exit ;; - *:*VMS:*:*) - UNAME_MACHINE=`(uname -p) 2>/dev/null` - case "${UNAME_MACHINE}" in - A*) echo alpha-dec-vms ; exit ;; - I*) echo ia64-dec-vms ; exit ;; - V*) echo vax-dec-vms ; exit ;; - esac ;; - *:XENIX:*:SysV) - echo i386-pc-xenix - exit ;; - i*86:skyos:*:*) - echo ${UNAME_MACHINE}-pc-skyos`echo ${UNAME_RELEASE}` | sed -e 's/ .*$//' - exit ;; - i*86:rdos:*:*) - echo ${UNAME_MACHINE}-pc-rdos - exit ;; - i*86:AROS:*:*) - echo ${UNAME_MACHINE}-pc-aros - exit ;; -esac - -#echo '(No uname command or uname output not recognized.)' 1>&2 -#echo "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" 1>&2 - -eval $set_cc_for_build -cat >$dummy.c < -# include -#endif -main () -{ -#if defined (sony) -#if defined (MIPSEB) - /* BFD wants "bsd" instead of "newsos". Perhaps BFD should be changed, - I don't know.... */ - printf ("mips-sony-bsd\n"); exit (0); -#else -#include - printf ("m68k-sony-newsos%s\n", -#ifdef NEWSOS4 - "4" -#else - "" -#endif - ); exit (0); -#endif -#endif - -#if defined (__arm) && defined (__acorn) && defined (__unix) - printf ("arm-acorn-riscix\n"); exit (0); -#endif - -#if defined (hp300) && !defined (hpux) - printf ("m68k-hp-bsd\n"); exit (0); -#endif - -#if defined (NeXT) -#if !defined (__ARCHITECTURE__) -#define __ARCHITECTURE__ "m68k" -#endif - int version; - version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`; - if (version < 4) - printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version); - else - printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version); - exit (0); -#endif - -#if defined (MULTIMAX) || defined (n16) -#if defined (UMAXV) - printf ("ns32k-encore-sysv\n"); exit (0); -#else -#if defined (CMU) - printf ("ns32k-encore-mach\n"); exit (0); -#else - printf ("ns32k-encore-bsd\n"); exit (0); -#endif -#endif -#endif - -#if defined (__386BSD__) - printf ("i386-pc-bsd\n"); exit (0); -#endif - -#if defined (sequent) -#if defined (i386) - printf ("i386-sequent-dynix\n"); exit (0); -#endif -#if defined (ns32000) - printf ("ns32k-sequent-dynix\n"); exit (0); -#endif -#endif - -#if defined (_SEQUENT_) - struct utsname un; - - uname(&un); - - if (strncmp(un.version, "V2", 2) == 0) { - printf ("i386-sequent-ptx2\n"); exit (0); - } - if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */ - printf ("i386-sequent-ptx1\n"); exit (0); - } - printf ("i386-sequent-ptx\n"); exit (0); - -#endif - -#if defined (vax) -# if !defined (ultrix) -# include -# if defined (BSD) -# if BSD == 43 - printf ("vax-dec-bsd4.3\n"); exit (0); -# else -# if BSD == 199006 - printf ("vax-dec-bsd4.3reno\n"); exit (0); -# else - printf ("vax-dec-bsd\n"); exit (0); -# endif -# endif -# else - printf ("vax-dec-bsd\n"); exit (0); -# endif -# else - printf ("vax-dec-ultrix\n"); exit (0); -# endif -#endif - -#if defined (alliant) && defined (i860) - printf ("i860-alliant-bsd\n"); exit (0); -#endif - - exit (1); -} -EOF - -$CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null && SYSTEM_NAME=`$dummy` && - { echo "$SYSTEM_NAME"; exit; } - -# Apollos put the system type in the environment. - -test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit; } - -# Convex versions that predate uname can use getsysinfo(1) - -if [ -x /usr/convex/getsysinfo ] -then - case `getsysinfo -f cpu_type` in - c1*) - echo c1-convex-bsd - exit ;; - c2*) - if getsysinfo -f scalar_acc - then echo c32-convex-bsd - else echo c2-convex-bsd - fi - exit ;; - c34*) - echo c34-convex-bsd - exit ;; - c38*) - echo c38-convex-bsd - exit ;; - c4*) - echo c4-convex-bsd - exit ;; - esac -fi - -cat >&2 < in order to provide the needed -information to handle your system. - -config.guess timestamp = $timestamp - -uname -m = `(uname -m) 2>/dev/null || echo unknown` -uname -r = `(uname -r) 2>/dev/null || echo unknown` -uname -s = `(uname -s) 2>/dev/null || echo unknown` -uname -v = `(uname -v) 2>/dev/null || echo unknown` - -/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null` -/bin/uname -X = `(/bin/uname -X) 2>/dev/null` - -hostinfo = `(hostinfo) 2>/dev/null` -/bin/universe = `(/bin/universe) 2>/dev/null` -/usr/bin/arch -k = `(/usr/bin/arch -k) 2>/dev/null` -/bin/arch = `(/bin/arch) 2>/dev/null` -/usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null` -/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null` - -UNAME_MACHINE = ${UNAME_MACHINE} -UNAME_RELEASE = ${UNAME_RELEASE} -UNAME_SYSTEM = ${UNAME_SYSTEM} -UNAME_VERSION = ${UNAME_VERSION} -EOF - -exit 1 - -# Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) -# time-stamp-start: "timestamp='" -# time-stamp-format: "%:y-%02m-%02d" -# time-stamp-end: "'" -# End: diff --git a/src/png/config.h.in b/src/png/config.h.in deleted file mode 100644 index fb2349568c..0000000000 --- a/src/png/config.h.in +++ /dev/null @@ -1,86 +0,0 @@ -/* config.h.in. Generated from configure.ac by autoheader. */ - -/* Define to 1 if you have the header file. */ -#undef HAVE_DLFCN_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_INTTYPES_H - -/* Define to 1 if you have the `m' library (-lm). */ -#undef HAVE_LIBM - -/* Define to 1 if you have the `z' library (-lz). */ -#undef HAVE_LIBZ - -/* Define to 1 if you have the header file. */ -#undef HAVE_MALLOC_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_MEMORY_H - -/* Define to 1 if you have the `memset' function. */ -#undef HAVE_MEMSET - -/* Define to 1 if you have the `pow' function. */ -#undef HAVE_POW - -/* Define to 1 if you have the header file. */ -#undef HAVE_STDINT_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STDLIB_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STRINGS_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STRING_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_SYS_STAT_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_SYS_TYPES_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_UNISTD_H - -/* Define to the sub-directory in which libtool stores uninstalled libraries. - */ -#undef LT_OBJDIR - -/* Name of package */ -#undef PACKAGE - -/* Define to the address where bug reports for this package should be sent. */ -#undef PACKAGE_BUGREPORT - -/* Define to the full name of this package. */ -#undef PACKAGE_NAME - -/* Define to the full name and version of this package. */ -#undef PACKAGE_STRING - -/* Define to the one symbol short name of this package. */ -#undef PACKAGE_TARNAME - -/* Define to the home page for this package. */ -#undef PACKAGE_URL - -/* Define to the version of this package. */ -#undef PACKAGE_VERSION - -/* Define to 1 if you have the ANSI C header files. */ -#undef STDC_HEADERS - -/* Define to 1 if your declares `struct tm'. */ -#undef TM_IN_SYS_TIME - -/* Version number of package */ -#undef VERSION - -/* Define to empty if `const' does not conform to ANSI C. */ -#undef const - -/* Define to `unsigned int' if does not define. */ -#undef size_t diff --git a/src/png/config.sub b/src/png/config.sub deleted file mode 100755 index 320e303881..0000000000 --- a/src/png/config.sub +++ /dev/null @@ -1,1739 +0,0 @@ -#! /bin/sh -# Configuration validation subroutine script. -# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, -# 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 -# Free Software Foundation, Inc. - -timestamp='2010-09-11' - -# This file is (in principle) common to ALL GNU software. -# The presence of a machine in this file suggests that SOME GNU software -# can handle that machine. It does not imply ALL GNU software can. -# -# This file is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA -# 02110-1301, USA. -# -# As a special exception to the GNU General Public License, if you -# distribute this file as part of a program that contains a -# configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. - - -# Please send patches to . Submit a context -# diff and a properly formatted GNU ChangeLog entry. -# -# Configuration subroutine to validate and canonicalize a configuration type. -# Supply the specified configuration type as an argument. -# If it is invalid, we print an error message on stderr and exit with code 1. -# Otherwise, we print the canonical config type on stdout and succeed. - -# You can get the latest version of this script from: -# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD - -# This file is supposed to be the same for all GNU packages -# and recognize all the CPU types, system types and aliases -# that are meaningful with *any* GNU software. -# Each package is responsible for reporting which valid configurations -# it does not support. 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- *) - LIBPNG_DEFINES=-DPNG_CONFIGURE_LIBPNG;; -esac -LIBPNG_DEFINES=$LIBPNG_DEFINES -AC_SUBST(LIBPNG_DEFINES) - -AC_MSG_CHECKING([if libraries can be versioned]) -# Special case for PE/COFF platforms: ld reports -# support for version-script, but doesn't actually -# DO anything with it. -case $host in -*cygwin* | *mingw32* ) - have_ld_version_script=no - AC_MSG_RESULT(no) -;; -* ) -GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script` -if test "$GLD"; then - have_ld_version_script=yes - AC_MSG_RESULT(yes) -else - have_ld_version_script=no - AC_MSG_RESULT(no) - AC_MSG_WARN(*** You have not enabled versioned symbols.) -fi -;; -esac - -AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes") - -if test "$have_ld_version_script" = "yes"; then - AC_MSG_CHECKING([for symbol prefix]) - SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \ - | ${CPP-${CC-gcc} -E} - 2>&1 \ - | ${EGREP-grep} "^PREFIX=" \ - | ${SED-sed} "s:^PREFIX=::"` - AC_SUBST(SYMBOL_PREFIX) - AC_MSG_RESULT($SYMBOL_PREFIX) -fi - -# Substitutions for .in files -AC_SUBST(PNGLIB_VERSION) -AC_SUBST(PNGLIB_MAJOR) -AC_SUBST(PNGLIB_MINOR) -AC_SUBST(PNGLIB_RELEASE) - -# Additional arguments (and substitutions) -# Allow the pkg-config directory to be set -AC_ARG_WITH(pkgconfigdir, - AC_HELP_STRING([--with-pkgconfigdir], - [Use the specified pkgconfig dir (default is libdir/pkgconfig)]), - [pkgconfigdir=${withval}], - [pkgconfigdir='${libdir}/pkgconfig']) - -AC_SUBST([pkgconfigdir]) -AC_MSG_NOTICE([pkgconfig directory is ${pkgconfigdir}]) - -# Make the *-config binary config scripts optional -AC_ARG_WITH(binconfigs, - AC_HELP_STRING([--with-binconfigs], - [Generate shell libpng-config scripts as well as pkg-config data] - [@<:@default=yes@:>@]), - [if test "${withval}" = no; 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without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. - -# You should have received a copy of the GNU General Public License -# along with this program. If not, see . - -# As a special exception to the GNU General Public License, if you -# distribute this file as part of a program that contains a -# configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. - -# Originally written by Alexandre Oliva . - -case $1 in - '') - echo "$0: No command. 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Breaking it into two sed invocations is a workaround. - sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" - rm -f "$tmpdepfile" "$tmpdepfile".bak - ;; - -cpp) - # Important note: in order to support this mode, a compiler *must* - # always write the preprocessed file to stdout. - "$@" || exit $? - - # Remove the call to Libtool. - if test "$libtool" = yes; then - while test "X$1" != 'X--mode=compile'; do - shift - done - shift - fi - - # Remove `-o $object'. - IFS=" " - for arg - do - case $arg in - -o) - shift - ;; - $object) - shift - ;; - *) - set fnord "$@" "$arg" - shift # fnord - shift # $arg - ;; - esac - done - - "$@" -E | - sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ - -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' | - sed '$ s: \\$::' > "$tmpdepfile" - rm -f "$depfile" - echo "$object : \\" > "$depfile" - cat < "$tmpdepfile" >> "$depfile" - sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile" - rm -f "$tmpdepfile" - ;; - -msvisualcpp) - # Important note: in order to support this mode, a compiler *must* - # always write the preprocessed file to stdout. - "$@" || exit $? - - # Remove the call to Libtool. - if test "$libtool" = yes; then - while test "X$1" != 'X--mode=compile'; do - shift - done - shift - fi - - IFS=" " - for arg - do - case "$arg" in - -o) - shift - ;; - $object) - shift - ;; - "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") - set fnord "$@" - shift - shift - ;; - *) - set fnord "$@" "$arg" - shift - shift - ;; - esac - done - "$@" -E 2>/dev/null | - sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" - rm -f "$depfile" - echo "$object : \\" > "$depfile" - sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s:: \1 \\:p' >> "$depfile" - echo " " >> "$depfile" - sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" - rm -f "$tmpdepfile" - ;; - -msvcmsys) - # This case exists only to let depend.m4 do its work. It works by - # looking at the text of this script. This case will never be run, - # since it is checked for above. - exit 1 - ;; - -none) - exec "$@" - ;; - -*) - echo "Unknown depmode $depmode" 1>&2 - exit 1 - ;; -esac - -exit 0 - -# Local Variables: -# mode: shell-script -# sh-indentation: 2 -# eval: (add-hook 'write-file-hooks 'time-stamp) -# time-stamp-start: "scriptversion=" -# time-stamp-format: "%:y-%02m-%02d.%02H" -# time-stamp-time-zone: "UTC" -# time-stamp-end: "; # UTC" -# End: diff --git a/src/png/example.c b/src/png/example.c index d7391734de..105078b9e4 100644 --- a/src/png/example.c +++ b/src/png/example.c @@ -2,15 +2,15 @@ #if 0 /* in case someone actually tries to compile this */ /* example.c - an example of using libpng - * Last changed in libpng 1.4.2 [May 6, 2010] + * Last changed in libpng 1.5.6 [November 3, 2011] * This file has been placed in the public domain by the authors. - * Maintained 1998-2010 Glenn Randers-Pehrson + * Maintained 1998-2011 Glenn Randers-Pehrson * Maintained 1996, 1997 Andreas Dilger) * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) */ /* This is an example of how to use libpng to read and write PNG files. - * The file libpng.txt is much more verbose then this. If you have not + * The file libpng-manual.txt is much more verbose then this. If you have not * read it, do so first. This was designed to be a starting point of an * implementation. This is not officially part of libpng, is hereby placed * in the public domain, and therefore does not require a copyright notice. @@ -22,6 +22,10 @@ * see also the programs in the contrib directory. */ +#define _POSIX_SOURCE 1 /* libpng and zlib are POSIX-compliant. You may + * change this if your application uses non-POSIX + * extensions. */ + #include "png.h" /* The png_jmpbuf() macro, used in error handling, became available in @@ -31,7 +35,7 @@ */ #ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) +# define png_jmpbuf(png_ptr) ((png_ptr)->png_jmpbuf) #endif /* Check to see if a file is a PNG file using png_sig_cmp(). png_sig_cmp() @@ -183,8 +187,15 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ * are mutually exclusive. */ - /* Tell libpng to strip 16 bit/color files down to 8 bits/color */ + /* Tell libpng to strip 16 bit/color files down to 8 bits/color. + * Use accurate scaling if it's available, otherwise just chop off the + * low byte. + */ +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + png_set_scale_16(png_ptr); +#else png_set_strip_16(png_ptr); +#endif /* Strip alpha bytes from the input data without combining with the * background (not recommended). @@ -286,7 +297,6 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ /* An array of colors to which the image should be quantized */ png_color std_color_cube[MAX_SCREEN_COLORS]; - /* Prior to libpng-1.4.2, this was png_set_dither(). */ png_set_quantize(png_ptr, std_color_cube, MAX_SCREEN_COLORS, MAX_SCREEN_COLORS, NULL, 0); } @@ -331,11 +341,16 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ /* Add filler (or alpha) byte (before/after each RGB triplet) */ png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER); +#ifdef PNG_READ_INTERLACING_SUPPORTED /* Turn on interlace handling. REQUIRED if you are not using * png_read_image(). To see how to handle interlacing passes, * see the png_read_row() method below: */ number_passes = png_set_interlace_handling(png_ptr); +#else + number_passes = 1; +#endif /* PNG_READ_INTERLACING_SUPPORTED */ + /* Optional call to gamma correct and add the background to the palette * and update info structure. REQUIRED if you are expecting libpng to @@ -517,6 +532,7 @@ row_callback(png_structp png_ptr, png_bytep new_row, */ png_bytep old_row = ((png_bytep *)our_data)[row_num]; +#ifdef PNG_READ_INTERLACING_SUPPORTED /* If both rows are allocated then copy the new row * data to the corresponding row data. */ @@ -545,6 +561,7 @@ row_callback(png_structp png_ptr, png_bytep new_row, * to pass the current row as new_row, and the function will combine * the old row and the new row. */ +#endif /* PNG_READ_INTERLACING_SUPPORTED */ } end_callback(png_structp png_ptr, png_infop info) @@ -656,14 +673,18 @@ void write_png(char *file_name /* , ... other image information ... */) /* Optional significant bit (sBIT) chunk */ png_color_8 sig_bit; + /* If we are dealing with a grayscale image then */ sig_bit.gray = true_bit_depth; + /* Otherwise, if we are dealing with a color image then */ sig_bit.red = true_red_bit_depth; sig_bit.green = true_green_bit_depth; sig_bit.blue = true_blue_bit_depth; + /* If the image has an alpha channel then */ sig_bit.alpha = true_alpha_bit_depth; + png_set_sBIT(png_ptr, info_ptr, &sig_bit); @@ -676,20 +697,21 @@ void write_png(char *file_name /* , ... other image information ... */) text_ptr[0].key = "Title"; text_ptr[0].text = "Mona Lisa"; text_ptr[0].compression = PNG_TEXT_COMPRESSION_NONE; + text_ptr[0].itxt_length = 0; + text_ptr[0].lang = NULL; + text_ptr[0].lang_key = NULL; text_ptr[1].key = "Author"; text_ptr[1].text = "Leonardo DaVinci"; text_ptr[1].compression = PNG_TEXT_COMPRESSION_NONE; + text_ptr[1].itxt_length = 0; + text_ptr[1].lang = NULL; + text_ptr[1].lang_key = NULL; text_ptr[2].key = "Description"; text_ptr[2].text = ""; text_ptr[2].compression = PNG_TEXT_COMPRESSION_zTXt; -#ifdef PNG_iTXt_SUPPORTED - text_ptr[0].lang = NULL; - text_ptr[0].lang_key = NULL; - text_ptr[1].lang = NULL; - text_ptr[1].lang_key = NULL; + text_ptr[2].itxt_length = 0; text_ptr[2].lang = NULL; text_ptr[2].lang_key = NULL; -#endif png_set_text(png_ptr, info_ptr, text_ptr, 3); /* Other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs */ @@ -754,6 +776,7 @@ void write_png(char *file_name /* , ... other image information ... */) /* Turn on interlace handling if you are not using png_write_image() */ if (interlacing) number_passes = png_set_interlace_handling(png_ptr); + else number_passes = 1; diff --git a/src/png/install-sh b/src/png/install-sh deleted file mode 100755 index 6781b987bd..0000000000 --- a/src/png/install-sh +++ /dev/null @@ -1,520 +0,0 @@ -#!/bin/sh -# install - install a program, script, or datafile - -scriptversion=2009-04-28.21; # UTC - -# This originates from X11R5 (mit/util/scripts/install.sh), which was -# later released in X11R6 (xc/config/util/install.sh) with the -# following copyright and license. -# -# Copyright (C) 1994 X Consortium -# -# Permission is hereby granted, free of charge, to any person obtaining a copy -# of this software and associated documentation files (the "Software"), to -# deal in the Software without restriction, including without limitation the -# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or -# sell copies of the Software, and to permit persons to whom the Software is -# furnished to do so, subject to the following conditions: -# -# The above copyright notice and this permission notice shall be included in -# all copies or substantial portions of the Software. -# -# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN -# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- -# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -# -# Except as contained in this notice, the name of the X Consortium shall not -# be used in advertising or otherwise to promote the sale, use or other deal- -# ings in this Software without prior written authorization from the X Consor- -# tium. -# -# -# FSF changes to this file are in the public domain. -# -# Calling this script install-sh is preferred over install.sh, to prevent -# `make' implicit rules from creating a file called install from it -# when there is no Makefile. -# -# This script is compatible with the BSD install script, but was written -# from scratch. - -nl=' -' -IFS=" "" $nl" - -# set DOITPROG to echo to test this script - -# Don't use :- since 4.3BSD and earlier shells don't like it. -doit=${DOITPROG-} -if test -z "$doit"; then - doit_exec=exec -else - doit_exec=$doit -fi - -# Put in absolute file names if you don't have them in your path; -# or use environment vars. - -chgrpprog=${CHGRPPROG-chgrp} -chmodprog=${CHMODPROG-chmod} -chownprog=${CHOWNPROG-chown} -cmpprog=${CMPPROG-cmp} -cpprog=${CPPROG-cp} -mkdirprog=${MKDIRPROG-mkdir} -mvprog=${MVPROG-mv} -rmprog=${RMPROG-rm} -stripprog=${STRIPPROG-strip} - -posix_glob='?' -initialize_posix_glob=' - test "$posix_glob" != "?" || { - if (set -f) 2>/dev/null; then - posix_glob= - else - posix_glob=: - fi - } -' - -posix_mkdir= - -# Desired mode of installed file. -mode=0755 - -chgrpcmd= -chmodcmd=$chmodprog -chowncmd= -mvcmd=$mvprog -rmcmd="$rmprog -f" -stripcmd= - -src= -dst= -dir_arg= -dst_arg= - -copy_on_change=false -no_target_directory= - -usage="\ -Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE - or: $0 [OPTION]... SRCFILES... DIRECTORY - or: $0 [OPTION]... -t DIRECTORY SRCFILES... - or: $0 [OPTION]... -d DIRECTORIES... - -In the 1st form, copy SRCFILE to DSTFILE. -In the 2nd and 3rd, copy all SRCFILES to DIRECTORY. -In the 4th, create DIRECTORIES. - -Options: - --help display this help and exit. - --version display version info and exit. - - -c (ignored) - -C install only if different (preserve the last data modification time) - -d create directories instead of installing files. - -g GROUP $chgrpprog installed files to GROUP. - -m MODE $chmodprog installed files to MODE. - -o USER $chownprog installed files to USER. - -s $stripprog installed files. - -t DIRECTORY install into DIRECTORY. - -T report an error if DSTFILE is a directory. - -Environment variables override the default commands: - CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG - RMPROG STRIPPROG -" - -while test $# -ne 0; do - case $1 in - -c) ;; - - -C) copy_on_change=true;; - - -d) dir_arg=true;; - - -g) chgrpcmd="$chgrpprog $2" - shift;; - - --help) echo "$usage"; exit $?;; - - -m) mode=$2 - case $mode in - *' '* | *' '* | *' -'* | *'*'* | *'?'* | *'['*) - echo "$0: invalid mode: $mode" >&2 - exit 1;; - esac - shift;; - - -o) chowncmd="$chownprog $2" - shift;; - - -s) stripcmd=$stripprog;; - - -t) dst_arg=$2 - shift;; - - -T) no_target_directory=true;; - - --version) echo "$0 $scriptversion"; exit $?;; - - --) shift - break;; - - -*) echo "$0: invalid option: $1" >&2 - exit 1;; - - *) break;; - esac - shift -done - -if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then - # When -d is used, all remaining arguments are directories to create. - # When -t is used, the destination is already specified. - # Otherwise, the last argument is the destination. Remove it from $@. - for arg - do - if test -n "$dst_arg"; then - # $@ is not empty: it contains at least $arg. - set fnord "$@" "$dst_arg" - shift # fnord - fi - shift # arg - dst_arg=$arg - done -fi - -if test $# -eq 0; then - if test -z "$dir_arg"; then - echo "$0: no input file specified." >&2 - exit 1 - fi - # It's OK to call `install-sh -d' without argument. - # This can happen when creating conditional directories. - exit 0 -fi - -if test -z "$dir_arg"; then - trap '(exit $?); exit' 1 2 13 15 - - # Set umask so as not to create temps with too-generous modes. - # However, 'strip' requires both read and write access to temps. - case $mode in - # Optimize common cases. - *644) cp_umask=133;; - *755) cp_umask=22;; - - *[0-7]) - if test -z "$stripcmd"; then - u_plus_rw= - else - u_plus_rw='% 200' - fi - cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;; - *) - if test -z "$stripcmd"; then - u_plus_rw= - else - u_plus_rw=,u+rw - fi - cp_umask=$mode$u_plus_rw;; - esac -fi - -for src -do - # Protect names starting with `-'. - case $src in - -*) src=./$src;; - esac - - if test -n "$dir_arg"; then - dst=$src - dstdir=$dst - test -d "$dstdir" - dstdir_status=$? - else - - # Waiting for this to be detected by the "$cpprog $src $dsttmp" command - # might cause directories to be created, which would be especially bad - # if $src (and thus $dsttmp) contains '*'. - if test ! -f "$src" && test ! -d "$src"; then - echo "$0: $src does not exist." >&2 - exit 1 - fi - - if test -z "$dst_arg"; then - echo "$0: no destination specified." >&2 - exit 1 - fi - - dst=$dst_arg - # Protect names starting with `-'. - case $dst in - -*) dst=./$dst;; - esac - - # If destination is a directory, append the input filename; won't work - # if double slashes aren't ignored. - if test -d "$dst"; then - if test -n "$no_target_directory"; then - echo "$0: $dst_arg: Is a directory" >&2 - exit 1 - fi - dstdir=$dst - dst=$dstdir/`basename "$src"` - dstdir_status=0 - else - # Prefer dirname, but fall back on a substitute if dirname fails. - dstdir=` - (dirname "$dst") 2>/dev/null || - expr X"$dst" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \ - X"$dst" : 'X\(//\)[^/]' \| \ - X"$dst" : 'X\(//\)$' \| \ - X"$dst" : 'X\(/\)' \| . 2>/dev/null || - echo X"$dst" | - sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ - s//\1/ - q - } - /^X\(\/\/\)[^/].*/{ - s//\1/ - q - } - /^X\(\/\/\)$/{ - s//\1/ - q - } - /^X\(\/\).*/{ - s//\1/ - q - } - s/.*/./; q' - ` - - test -d "$dstdir" - dstdir_status=$? - fi - fi - - obsolete_mkdir_used=false - - if test $dstdir_status != 0; then - case $posix_mkdir in - '') - # Create intermediate dirs using mode 755 as modified by the umask. - # This is like FreeBSD 'install' as of 1997-10-28. - umask=`umask` - case $stripcmd.$umask in - # Optimize common cases. - *[2367][2367]) mkdir_umask=$umask;; - .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;; - - *[0-7]) - mkdir_umask=`expr $umask + 22 \ - - $umask % 100 % 40 + $umask % 20 \ - - $umask % 10 % 4 + $umask % 2 - `;; - *) mkdir_umask=$umask,go-w;; - esac - - # With -d, create the new directory with the user-specified mode. - # Otherwise, rely on $mkdir_umask. - if test -n "$dir_arg"; then - mkdir_mode=-m$mode - else - mkdir_mode= - fi - - posix_mkdir=false - case $umask in - *[123567][0-7][0-7]) - # POSIX mkdir -p sets u+wx bits regardless of umask, which - # is incompatible with FreeBSD 'install' when (umask & 300) != 0. - ;; - *) - tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$ - trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0 - - if (umask $mkdir_umask && - exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1 - then - if test -z "$dir_arg" || { - # Check for POSIX incompatibilities with -m. - # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or - # other-writeable bit of parent directory when it shouldn't. - # FreeBSD 6.1 mkdir -m -p sets mode of existing directory. - ls_ld_tmpdir=`ls -ld "$tmpdir"` - case $ls_ld_tmpdir in - d????-?r-*) different_mode=700;; - d????-?--*) different_mode=755;; - *) false;; - esac && - $mkdirprog -m$different_mode -p -- "$tmpdir" && { - ls_ld_tmpdir_1=`ls -ld "$tmpdir"` - test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1" - } - } - then posix_mkdir=: - fi - rmdir "$tmpdir/d" "$tmpdir" - else - # Remove any dirs left behind by ancient mkdir implementations. - rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null - fi - trap '' 0;; - esac;; - esac - - if - $posix_mkdir && ( - umask $mkdir_umask && - $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir" - ) - then : - else - - # The umask is ridiculous, or mkdir does not conform to POSIX, - # or it failed possibly due to a race condition. Create the - # directory the slow way, step by step, checking for races as we go. - - case $dstdir in - /*) prefix='/';; - -*) prefix='./';; - *) prefix='';; - esac - - eval "$initialize_posix_glob" - - oIFS=$IFS - IFS=/ - $posix_glob set -f - set fnord $dstdir - shift - $posix_glob set +f - IFS=$oIFS - - prefixes= - - for d - do - test -z "$d" && continue - - prefix=$prefix$d - if test -d "$prefix"; then - prefixes= - else - if $posix_mkdir; then - (umask=$mkdir_umask && - $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break - # Don't fail if two instances are running concurrently. - test -d "$prefix" || exit 1 - else - case $prefix in - *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;; - *) qprefix=$prefix;; - esac - prefixes="$prefixes '$qprefix'" - fi - fi - prefix=$prefix/ - done - - if test -n "$prefixes"; then - # Don't fail if two instances are running concurrently. - (umask $mkdir_umask && - eval "\$doit_exec \$mkdirprog $prefixes") || - test -d "$dstdir" || exit 1 - obsolete_mkdir_used=true - fi - fi - fi - - if test -n "$dir_arg"; then - { test -z "$chowncmd" || $doit $chowncmd "$dst"; } && - { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } && - { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false || - test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1 - else - - # Make a couple of temp file names in the proper directory. - dsttmp=$dstdir/_inst.$$_ - rmtmp=$dstdir/_rm.$$_ - - # Trap to clean up those temp files at exit. - trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0 - - # Copy the file name to the temp name. - (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") && - - # and set any options; do chmod last to preserve setuid bits. - # - # If any of these fail, we abort the whole thing. If we want to - # ignore errors from any of these, just make sure not to ignore - # errors from the above "$doit $cpprog $src $dsttmp" command. - # - { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } && - { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } && - { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } && - { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } && - - # If -C, don't bother to copy if it wouldn't change the file. - if $copy_on_change && - old=`LC_ALL=C ls -dlL "$dst" 2>/dev/null` && - new=`LC_ALL=C ls -dlL "$dsttmp" 2>/dev/null` && - - eval "$initialize_posix_glob" && - $posix_glob set -f && - set X $old && old=:$2:$4:$5:$6 && - set X $new && new=:$2:$4:$5:$6 && - $posix_glob set +f && - - test "$old" = "$new" && - $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1 - then - rm -f "$dsttmp" - else - # Rename the file to the real destination. - $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null || - - # The rename failed, perhaps because mv can't rename something else - # to itself, or perhaps because mv is so ancient that it does not - # support -f. - { - # Now remove or move aside any old file at destination location. - # We try this two ways since rm can't unlink itself on some - # systems and the destination file might be busy for other - # reasons. In this case, the final cleanup might fail but the new - # file should still install successfully. - { - test ! -f "$dst" || - $doit $rmcmd -f "$dst" 2>/dev/null || - { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null && - { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; } - } || - { echo "$0: cannot unlink or rename $dst" >&2 - (exit 1); exit 1 - } - } && - - # Now rename the file to the real destination. - $doit $mvcmd "$dsttmp" "$dst" - } - fi || exit 1 - - trap '' 0 - fi -done - -# Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) -# time-stamp-start: "scriptversion=" -# time-stamp-format: "%:y-%02m-%02d.%02H" -# time-stamp-time-zone: "UTC" -# time-stamp-end: "; # UTC" -# End: diff --git a/src/png/libpng-config.in b/src/png/libpng-config.in index 2987cef8ee..69bf8e33f0 100755 --- a/src/png/libpng-config.in +++ b/src/png/libpng-config.in @@ -104,8 +104,8 @@ while test $# -gt 0; do ;; --ldopts) - echo ${ldopts} - ;; + echo ${ldopts} + ;; --ldflags) echo ${ldopts} ${L_opts} ${R_opts} ${libs} @@ -113,7 +113,7 @@ while test $# -gt 0; do --static) R_opts="" - libs=${all_libs} + libs=${all_libs} ;; *) diff --git a/src/png/libpng-1.4.4.txt b/src/png/libpng-manual.txt similarity index 64% rename from src/png/libpng-1.4.4.txt rename to src/png/libpng-manual.txt index dbd7e3b22d..8f9791093e 100644 --- a/src/png/libpng-1.4.4.txt +++ b/src/png/libpng-manual.txt @@ -1,9 +1,9 @@ -libpng.txt - A description on how to use and modify libpng +libpng-manual.txt - A description on how to use and modify libpng - libpng version 1.4.4 - September 23, 2010 + libpng version 1.5.6 - November 3, 2011 Updated and distributed by Glenn Randers-Pehrson - Copyright (c) 1998-2010 Glenn Randers-Pehrson + Copyright (c) 1998-2011 Glenn Randers-Pehrson This document is released under the libpng license. For conditions of distribution and use, see the disclaimer @@ -11,9 +11,9 @@ libpng.txt - A description on how to use and modify libpng Based on: - libpng versions 0.97, January 1998, through 1.4.4 - September 23, 2010 + libpng versions 0.97, January 1998, through 1.5.6 - November 3, 2011 Updated and distributed by Glenn Randers-Pehrson - Copyright (c) 1998-2010 Glenn Randers-Pehrson + Copyright (c) 1998-2011 Glenn Randers-Pehrson libpng 1.0 beta 6 version 0.96 May 28, 1997 Updated and distributed by Andreas Dilger @@ -99,34 +99,203 @@ same instance of a structure. II. Structures There are two main structures that are important to libpng, png_struct -and png_info. The first, png_struct, is an internal structure that -will not, for the most part, be used by a user except as the first -variable passed to every libpng function call. +and png_info. Both are internal structures that are no longer exposed +in the libpng interface (as of libpng 1.5.0). The png_info structure is designed to provide information about the PNG file. At one time, the fields of png_info were intended to be directly accessible to the user. However, this tended to cause problems with applications using dynamically loaded libraries, and as a result a set of interface functions for png_info (the png_get_*() and png_set_*() -functions) was developed. The fields of png_info are still available for -older applications, but it is suggested that applications use the new -interfaces if at all possible. - -Applications that do make direct access to the members of png_struct (except -for png_ptr->jmpbuf) must be recompiled whenever the library is updated, -and applications that make direct access to the members of png_info must -be recompiled if they were compiled or loaded with libpng version 1.0.6, -in which the members were in a different order. In version 1.0.7, the -members of the png_info structure reverted to the old order, as they were -in versions 0.97c through 1.0.5. Starting with version 2.0.0, both -structures are going to be hidden, and the contents of the structures will -only be accessible through the png_get/png_set functions. +functions) was developed, and direct access to the png_info fields was +deprecated.. + +The png_struct structure is the object used by the library to decode a +single image. As of 1.5.0 this structure is also not exposed. + +Almost all libpng APIs require a pointer to a png_struct as the first argument. +Many (in particular the png_set and png_get APIs) also require a pointer +to png_info as the second argument. Some application visible macros +defined in png.h designed for basic data access (reading and writing +integers in the PNG format) don't take a png_info pointer, but it's almost +always safe to assume that a (png_struct*) has to be passed to call an API +function. + +You can have more than one png_info structure associated with an image, +as illustrated in pngtest.c, one for information valid prior to the +IDAT chunks and another (called "end_info" below) for things after them. The png.h header file is an invaluable reference for programming with libpng. And while I'm on the topic, make sure you include the libpng header file: #include +and also (as of libpng-1.5.0) the zlib header file, if you need it: + +#include + +Types + +The png.h header file defines a number of integral types used by the +APIs. Most of these are fairly obvious; for example types corresponding +to integers of particular sizes and types for passing color values. + +One exception is how non-integral numbers are handled. For application +convenience most APIs that take such numbers have C (double) arguments, +however internally PNG, and libpng, use 32 bit signed integers and encode +the value by multiplying by 100,000. As of libpng 1.5.0 a convenience +macro PNG_FP_1 is defined in png.h along with a type (png_fixed_point) +which is simply (png_int_32). + +All APIs that take (double) arguments also have a matching API that +takes the corresponding fixed point integer arguments. The fixed point +API has the same name as the floating point one with "_fixed" appended. +The actual range of values permitted in the APIs is frequently less than +the full range of (png_fixed_point) (-21474 to +21474). When APIs require +a non-negative argument the type is recorded as png_uint_32 above. Consult +the header file and the text below for more information. + +Special care must be take with sCAL chunk handling because the chunk itself +uses non-integral values encoded as strings containing decimal floating point +numbers. See the comments in the header file. + +Configuration + +The main header file function declarations are frequently protected by C +preprocessing directives of the form: + + #ifdef PNG_feature_SUPPORTED + declare-function + #endif + ... + #ifdef PNG_feature_SUPPORTED + use-function + #endif + +The library can be built without support for these APIs, although a +standard build will have all implemented APIs. Application programs +should check the feature macros before using an API for maximum +portability. From libpng 1.5.0 the feature macros set during the build +of libpng are recorded in the header file "pnglibconf.h" and this file +is always included by png.h. + +If you don't need to change the library configuration from the default, skip to +the next section ("Reading"). + +Notice that some of the makefiles in the 'scripts' directory and (in 1.5.0) all +of the build project files in the 'projects' directory simply copy +scripts/pnglibconf.h.prebuilt to pnglibconf.h. This means that these build +systems do not permit easy auto-configuration of the library - they only +support the default configuration. + +The easiest way to make minor changes to the libpng configuration when +auto-configuration is supported is to add definitions to the command line +using (typically) CPPFLAGS. For example: + +CPPFLAGS=-DPNG_NO_FLOATING_ARITHMETIC + +will change the internal libpng math implementation for gamma correction and +other arithmetic calculations to fixed point, avoiding the need for fast +floating point support. The result can be seen in the generated pnglibconf.h - +make sure it contains the changed feature macro setting. + +If you need to make more extensive configuration changes - more than one or two +feature macro settings - you can either add -DPNG_USER_CONFIG to the build +command line and put a list of feature macro settings in pngusr.h or you can set +DFA_XTRA (a makefile variable) to a file containing the same information in the +form of 'option' settings. + +A. Changing pnglibconf.h + +A variety of methods exist to build libpng. Not all of these support +reconfiguration of pnglibconf.h. To reconfigure pnglibconf.h it must either be +rebuilt from scripts/pnglibconf.dfa using awk or it must be edited by hand. + +Hand editing is achieved by copying scripts/pnglibconf.h.prebuilt to +pnglibconf.h and changing the lines defining the supported features, paying +very close attention to the 'option' information in scripts/pnglibconf.dfa +that describes those features and their requirements. This is easy to get +wrong. + +B. Configuration using DFA_XTRA + +Rebuilding from pnglibconf.dfa is easy if a functioning 'awk', or a later +variant such as 'nawk' or 'gawk', is available. The configure build will +automatically find an appropriate awk and build pnglibconf.h. +The scripts/pnglibconf.mak file contains a set of make rules for doing the +same thing if configure is not used, and many of the makefiles in the scripts +directory use this approach. + +When rebuilding simply write a new file containing changed options and set +DFA_XTRA to the name of this file. This causes the build to append the new file +to the end of scripts/pnglibconf.dfa. The pngusr.dfa file should contain lines +of the following forms: + +everything = off + +This turns all optional features off. Include it at the start of pngusr.dfa to +make it easier to build a minimal configuration. You will need to turn at least +some features on afterward to enable either reading or writing code, or both. + +option feature on +option feature off + +Enable or disable a single feature. This will automatically enable other +features required by a feature that is turned on or disable other features that +require a feature which is turned off. Conflicting settings will cause an error +message to be emitted by awk. + +setting feature default value + +Changes the default value of setting 'feature' to 'value'. There are a small +number of settings listed at the top of pnglibconf.h, they are documented in the +source code. Most of these values have performance implications for the library +but most of them have no visible effect on the API. Some can also be overridden +from the API. + +This method of building a customized pnglibconf.h is illustrated in +contrib/pngminim/*. See the "$(PNGCONF):" target in the makefile and +pngusr.dfa in these directories. + +C. Configuration using PNG_USR_CONFIG + +If -DPNG_USR_CONFIG is added to the CFLAGS when pnglibconf.h is built the file +pngusr.h will automatically be included before the options in +scripts/pnglibconf.dfa are processed. Your pngusr.h file should contain only +macro definitions turning features on or off or setting settings. + +Apart from the global setting "everything = off" all the options listed above +can be set using macros in pngusr.h: + +#define PNG_feature_SUPPORTED + +is equivalent to: + +option feature on + +#define PNG_NO_feature + +is equivalent to: + +option feature off + +#define PNG_feature value + +is equivalent to: + +setting feature default value + +Notice that in both cases, pngusr.dfa and pngusr.h, the contents of the +pngusr file you supply override the contents of scripts/pnglibconf.dfa + +If confusing or incomprehensible behavior results it is possible to +examine the intermediate file pnglibconf.dfn to find the full set of +dependency information for each setting and option. Simply locate the +feature in the file and read the C comments that precede it. + +This method is also illustrated in the contrib/pngminim/* makefiles and +pngusr.h. + III. Reading We'll now walk you through the possible functions to call when reading @@ -162,13 +331,15 @@ Customizing libpng. FILE *fp = fopen(file_name, "rb"); if (!fp) { - return (ERROR); + return (ERROR); } + fread(header, 1, number, fp); is_png = !png_sig_cmp(header, 0, number); + if (!is_png) { - return (NOT_PNG); + return (NOT_PNG); } @@ -184,33 +355,27 @@ The structure allocation functions quietly return NULL if they fail to create the structure, so your application should check for that. png_structp png_ptr = png_create_read_struct - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, + (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, user_error_fn, user_warning_fn); + if (!png_ptr) - return (ERROR); + return (ERROR); png_infop info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) { - png_destroy_read_struct(&png_ptr, + png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL); - return (ERROR); - } - - png_infop end_info = png_create_info_struct(png_ptr); - if (!end_info) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); + return (ERROR); } If you want to use your own memory allocation routines, -define PNG_USER_MEM_SUPPORTED and use +use a libpng that was built with PNG_USER_MEM_SUPPORTED defined, and use png_create_read_struct_2() instead of png_create_read_struct(): png_structp png_ptr = png_create_read_struct_2 - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, + (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, user_error_fn, user_warning_fn, (png_voidp) user_mem_ptr, user_malloc_fn, user_free_fn); @@ -222,7 +387,7 @@ handling and memory alloc/free functions. When libpng encounters an error, it expects to longjmp back to your routine. Therefore, you will need to call setjmp and pass your png_jmpbuf(png_ptr). If you read the file from different -routines, you will need to update the jmpbuf field every time you enter +routines, you will need to update the longjmp buffer every time you enter a new routine that will call a png_*() function. See your documentation of setjmp/longjmp for your compiler for more @@ -234,12 +399,15 @@ free any memory. if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, + png_destroy_read_struct(&png_ptr, &info_ptr, &end_info); - fclose(fp); - return (ERROR); + fclose(fp); + return (ERROR); } +Pass (png_infopp)NULL instead of &end_info if you didn't create +an end_info structure. + If you would rather avoid the complexity of setjmp/longjmp issues, you can compile libpng with PNG_NO_SETJMP, in which case errors will result in a call to PNG_ABORT() which defaults to abort(). @@ -273,12 +441,37 @@ where the default size is 8192 bytes. Note that the buffer size is changed immediately and the buffer is reallocated immediately, instead of setting a flag to be acted upon later. +If you want CRC errors to be handled in a different manner than +the default, use + + png_set_crc_action(png_ptr, crit_action, ancil_action); + +The values for png_set_crc_action() say how libpng is to handle CRC errors in +ancillary and critical chunks, and whether to use the data contained +therein. Note that it is impossible to "discard" data in a critical +chunk. + +Choices for (int) crit_action are + PNG_CRC_DEFAULT 0 error/quit + PNG_CRC_ERROR_QUIT 1 error/quit + PNG_CRC_WARN_USE 3 warn/use data + PNG_CRC_QUIET_USE 4 quiet/use data + PNG_CRC_NO_CHANGE 5 use the current value + +Choices for (int) ancil_action are + PNG_CRC_DEFAULT 0 error/quit + PNG_CRC_ERROR_QUIT 1 error/quit + PNG_CRC_WARN_DISCARD 2 warn/discard data + PNG_CRC_WARN_USE 3 warn/use data + PNG_CRC_QUIET_USE 4 quiet/use data + PNG_CRC_NO_CHANGE 5 use the current value + Setting up callback code You can set up a callback function to handle any unknown chunks in the input stream. You must supply the function - read_chunk_callback(png_ptr ptr, + read_chunk_callback(png_structp png_ptr, png_unknown_chunkp chunk); { /* The unknown chunk structure contains your @@ -324,8 +517,8 @@ called after each row has been read, which you can use to control a progress meter or the like. It's demonstrated in pngtest.c. You must supply a function - void read_row_callback(png_ptr ptr, png_uint_32 row, - int pass); + void read_row_callback(png_structp png_ptr, + png_uint_32 row, int pass); { /* put your code here */ } @@ -336,6 +529,19 @@ To inform libpng about your function, use png_set_read_status_fn(png_ptr, read_row_callback); +When this function is called the row has already been completely processed and +the 'row' and 'pass' refer to the next row to be handled. For the +non-interlaced case the row that was just handled is simply one less than the +passed in row number, and pass will always be 0. For the interlaced case the +same applies unless the row value is 0, in which case the row just handled was +the last one from one of the preceding passes. Because interlacing may skip a +pass you cannot be sure that the preceding pass is just 'pass-1', if you really +need to know what the last pass is record (row,pass) from the callback and use +the last recorded value each time. + +As with the user transform you can find the output row using the +PNG_ROW_FROM_PASS_ROW macro. + Unknown-chunk handling Now you get to set the way the library processes unknown chunks in the @@ -351,14 +557,17 @@ chunk types. To change this, you can call: 1: ignore; do not keep 2: keep only if safe-to-copy 3: keep even if unsafe-to-copy + You can use these definitions: PNG_HANDLE_CHUNK_AS_DEFAULT 0 PNG_HANDLE_CHUNK_NEVER 1 PNG_HANDLE_CHUNK_IF_SAFE 2 PNG_HANDLE_CHUNK_ALWAYS 3 + chunk_list - list of chunks affected (a byte string, five bytes per chunk, NULL or '\0' if num_chunks is 0) + num_chunks - number of chunks affected; if 0, all unknown chunks are affected. If nonzero, only the chunks in the list are affected @@ -370,6 +579,8 @@ according to the "keep" directive. If a chunk is named in successive instances of png_set_keep_unknown_chunks(), the final instance will take precedence. The IHDR and IEND chunks should not be named in chunk_list; if they are, libpng will process them normally anyway. +If you know that your application will never make use of some particular +chunks, use PNG_HANDLE_CHUNK_NEVER (or 1) as demonstrated below. Here is an example of the usage of png_set_keep_unknown_chunks(), where the private "vpAg" chunk will later be processed by a user chunk @@ -394,8 +605,10 @@ callback function: #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) /* ignore all unknown chunks: */ png_set_keep_unknown_chunks(read_ptr, 1, NULL, 0); + /* except for vpAg: */ png_set_keep_unknown_chunks(read_ptr, 2, vpAg, 1); + /* also ignore unused known chunks: */ png_set_keep_unknown_chunks(read_ptr, 1, unused_chunks, (int)sizeof(unused_chunks)/5); @@ -408,7 +621,7 @@ large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns. Since very few applications really need to process such large images, we have imposed an arbitrary 1-million limit on rows and columns. Larger images will be rejected immediately with a png_error() call. If -you wish to override this limit, you can use +you wish to change this limit, you can use png_set_user_limits(png_ptr, width_max, height_max); @@ -418,6 +631,10 @@ anyway because of potential buffer overflow conditions). You should put this statement after you create the PNG structure and before calling png_read_info(), png_read_png(), or png_process_data(). + +When writing a PNG datastream, put this statement before calling +png_write_info() or png_write_png(). + If you need to retrieve the limits that are being applied, use width_max = png_get_user_width_max(png_ptr); @@ -448,6 +665,242 @@ and you can retrieve the limit with Any chunks that would cause either of these limits to be exceeded will be ignored. +Information about your system + +If you intend to display the PNG or to incorporate it in other image data you +need to tell libpng information about your display or drawing surface so that +libpng can convert the values in the image to match the display. + +From libpng-1.5.4 this information can be set before reading the PNG file +header. In earlier versions png_set_gamma() existed but behaved incorrectly if +called before the PNG file header had been read and png_set_alpha_mode() did not +exist. + +If you need to support versions prior to libpng-1.5.4 test the version number +as illustrated below using "PNG_LIBPNG_VER >= 10504" and follow the procedures +described in the appropriate manual page. + +You give libpng the encoding expected by your system expressed as a 'gamma' +value. You can also specify a default encoding for the PNG file in +case the required information is missing from the file. By default libpng +assumes that the PNG data matches your system, to keep this default call: + + png_set_gamma(png_ptr, screen_gamma, 1/screen_gamma/*file gamma*/); + +or you can use the fixed point equivalent: + + png_set_gamma_fixed(png_ptr, PNG_FP_1*screen_gamma, PNG_FP_1/screen_gamma); + +If you don't know the gamma for your system it is probably 2.2 - a good +approximation to the IEC standard for display systems (sRGB). If images are +too contrasty or washed out you got the value wrong - check your system +documentation! + +Many systems permit the system gamma to be changed via a lookup table in the +display driver, a few systems, including older Macs, change the response by +default. As of 1.5.4 three special values are available to handle common +situations: + + PNG_DEFAULT_sRGB: Indicates that the system conforms to the IEC 61966-2-1 + standard. This matches almost all systems. + PNG_GAMMA_MAC_18: Indicates that the system is an older (pre Mac OS 10.6) + Apple Macintosh system with the default settings. + PNG_GAMMA_LINEAR: Just the fixed point value for 1.0 - indicates that the + system expects data with no gamma encoding. + +You would use the linear (unencoded) value if you need to process the pixel +values further because this avoids the need to decode and reencode each +component value whenever arithmetic is performed. A lot of graphics software +uses linear values for this reason, often with higher precision component values +to preserve overall accuracy. + +The second thing you may need to tell libpng about is how your system handles +alpha channel information. Some, but not all, PNG files contain an alpha +channel. To display these files correctly you need to compose the data onto a +suitable background, as described in the PNG specification. + +Libpng only supports composing onto a single color (using png_set_background; +see below). Otherwise you must do the composition yourself and, in this case, +you may need to call png_set_alpha_mode: + +#if PNG_LIBPNG_VER >= 10504 + png_set_alpha_mode(png_ptr, mode, screen_gamma); +#else + png_set_gamma(png_ptr, screen_gamma, 1.0/screen_gamma); +#endif + +The screen_gamma value is the same as the argument to png_set_gamma; however, +how it affects the output depends on the mode. png_set_alpha_mode() sets the +file gamma default to 1/screen_gamma, so normally you don't need to call +png_set_gamma. If you need different defaults call png_set_gamma() before +png_set_alpha_mode() - if you call it after it will override the settings made +by png_set_alpha_mode(). + +The mode is as follows: + + PNG_ALPHA_PNG: The data is encoded according to the PNG specification. Red, +green and blue, or gray, components are gamma encoded color +values and are not premultiplied by the alpha value. The +alpha value is a linear measure of the contribution of the +pixel to the corresponding final output pixel. + +You should normally use this format if you intend to perform +color correction on the color values; most, maybe all, color +correction software has no handling for the alpha channel and, +anyway, the math to handle pre-multiplied component values is +unnecessarily complex. + +Before you do any arithmetic on the component values you need +to remove the gamma encoding and multiply out the alpha +channel. See the PNG specification for more detail. It is +important to note that when an image with an alpha channel is +scaled, linear encoded, pre-multiplied component values must +be used! + +The remaining modes assume you don't need to do any further color correction or +that if you do, your color correction software knows all about alpha (it +probably doesn't!) + + PNG_ALPHA_STANDARD: The data libpng produces +is encoded in the standard way +assumed by most correctly written graphics software. +The gamma encoding will be removed by libpng and the +linear component values will be pre-multiplied by the +alpha channel. + +With this format the final image must be re-encoded to +match the display gamma before the image is displayed. +If your system doesn't do that, yet still seems to +perform arithmetic on the pixels without decoding them, +it is broken - check out the modes below. + +With PNG_ALPHA_STANDARD libpng always produces linear +component values, whatever screen_gamma you supply. The +screen_gamma value is, however, used as a default for +the file gamma if the PNG file has no gamma information. + +If you call png_set_gamma() after png_set_alpha_mode() you +will override the linear encoding. Instead the +pre-multiplied pixel values will be gamma encoded but +the alpha channel will still be linear. This may +actually match the requirements of some broken software, +but it is unlikely. + +While linear 8-bit data is often used it has +insufficient precision for any image with a reasonable +dynamic range. To avoid problems, and if your software +supports it, use png_set_expand_16() to force all +components to 16 bits. + + PNG_ALPHA_OPTIMIZED: This mode is the same +as PNG_ALPHA_STANDARD except that +completely opaque pixels are gamma encoded according to +the screen_gamma value. Pixels with alpha less than 1.0 +will still have linear components. + +Use this format if you have control over your +compositing software and do don't do other arithmetic +(such as scaling) on the data you get from libpng. Your +compositing software can simply copy opaque pixels to +the output but still has linear values for the +non-opaque pixels. + +In normal compositing, where the alpha channel encodes +partial pixel coverage (as opposed to broad area +translucency), the inaccuracies of the 8-bit +representation of non-opaque pixels are irrelevant. + +You can also try this format if your software is broken; +it might look better. + + PNG_ALPHA_BROKEN: This is PNG_ALPHA_STANDARD; +however, all component values, +including the alpha channel are gamma encoded. This is +an appropriate format to try if your software, or more +likely hardware, is totally broken, i.e., if it performs +linear arithmetic directly on gamma encoded values. + +In most cases of broken software or hardware the bug in the final display +manifests as a subtle halo around composited parts of the image. You may not +even perceive this as a halo; the composited part of the image may simply appear +separate from the background, as though it had been cut out of paper and pasted +on afterward. + +If you don't have to deal with bugs in software or hardware, or if you can fix +them, there are three recommended ways of using png_set_alpha_mode(): + + png_set_alpha_mode(png_ptr, PNG_ALPHA_PNG, + screen_gamma); + +You can do color correction on the result (libpng does not currently +support color correction internally). When you handle the alpha channel +you need to undo the gamma encoding and multiply out the alpha. + + png_set_alpha_mode(png_ptr, PNG_ALPHA_STANDARD, + screen_gamma); + png_set_expand_16(png_ptr); + +If you are using the high level interface, don't call png_set_expand_16(); +instead pass PNG_TRANSFORM_EXPAND_16 to the interface. + +With this mode you can't do color correction, but you can do arithmetic, +including composition and scaling, on the data without further processing. + + png_set_alpha_mode(png_ptr, PNG_ALPHA_OPTIMIZED, + screen_gamma); + +You can avoid the expansion to 16-bit components with this mode, but you +lose the ability to scale the image or perform other linear arithmetic. +All you can do is compose the result onto a matching output. Since this +mode is libpng-specific you also need to write your own composition +software. + +If you don't need, or can't handle, the alpha channel you can call +png_set_background() to remove it by compositing against a fixed color. Don't +call png_set_strip_alpha() to do this - it will leave spurious pixel values in +transparent parts of this image. + + png_set_background(png_ptr, &background_color, + PNG_BACKGROUND_GAMMA_SCREEN, 0, 1); + +The background_color is an RGB or grayscale value according to the data format +libpng will produce for you. Because you don't yet know the format of the PNG +file, if you call png_set_background at this point you must arrange for the +format produced by libpng to always have 8-bit or 16-bit components and then +store the color as an 8-bit or 16-bit color as appropriate. The color contains +separate gray and RGB component values, so you can let libpng produce gray or +RGB output according to the input format, but low bit depth grayscale images +must always be converted to at least 8-bit format. (Even though low bit depth +grayscale images can't have an alpha channel they can have a transparent +color!) + +You set the transforms you need later, either as flags to the high level +interface or libpng API calls for the low level interface. For reference the +settings and API calls required are: + +8-bit values: + PNG_TRANSFORM_SCALE_16 | PNG_EXPAND + png_set_expand(png_ptr); png_set_scale_16(png_ptr); + + If you must get exactly the same inaccurate results + produced by default in versions prior to libpng-1.5.4, + use PNG_TRANSFORM_STRIP_16 and png_set_strip_16(png_ptr) + instead. + +16-bit values: + PNG_TRANSFORM_EXPAND_16 + png_set_expand_16(png_ptr); + +In either case palette image data will be expanded to RGB. If you just want +color data you can add PNG_TRANSFORM_GRAY_TO_RGB or png_set_gray_to_rgb(png_ptr) +to the list. + +Calling png_set_background before the PNG file header is read will not work +prior to libpng-1.5.4. Because the failure may result in unexpected warnings or +errors it is therefore much safer to call png_set_background after the head has +been read. Unfortunately this means that prior to libpng-1.5.4 it cannot be +used with the high level interface. + The high-level read interface At this point there are two ways to proceed; through the high-level @@ -457,8 +910,10 @@ the entire image into memory, and (b) the input transformations you want to do are limited to the following set: PNG_TRANSFORM_IDENTITY No transformation - PNG_TRANSFORM_STRIP_16 Strip 16-bit samples to - 8 bits + PNG_TRANSFORM_SCALE_16 Strip 16-bit samples to + 8-bit accurately + PNG_TRANSFORM_STRIP_16 Chop 16-bit samples to + 8-bit less accurately PNG_TRANSFORM_STRIP_ALPHA Discard the alpha channel PNG_TRANSFORM_PACKING Expand 1, 2 and 4-bit samples to bytes @@ -477,6 +932,7 @@ you want to do are limited to the following set: PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples PNG_TRANSFORM_GRAY_TO_RGB Expand grayscale samples to RGB (or GA to RGBA) + PNG_TRANSFORM_EXPAND_16 Expand samples to 16 bits (This excludes setting a background color, doing gamma transformation, quantizing, and setting filler.) If this is the case, simply do this: @@ -508,17 +964,22 @@ row_pointers prior to calling png_read_png() with if (height > PNG_UINT_32_MAX/png_sizeof(png_byte)) png_error (png_ptr, - "Image is too tall to process in memory"); + "Image is too tall to process in memory"); + if (width > PNG_UINT_32_MAX/pixel_size) png_error (png_ptr, - "Image is too wide to process in memory"); + "Image is too wide to process in memory"); + row_pointers = png_malloc(png_ptr, - height*png_sizeof(png_bytep)); + height*png_sizeof(png_bytep)); + for (int i=0; i= 10504 + png_set_scale_16(png_ptr); +#else + png_set_strip_16(png_ptr); +#endif + +(The more accurate "png_set_scale_16()" API became available in libpng version +1.5.4). + +If you need to process the alpha channel on the image separately from the image +data (for example if you convert it to a bitmap mask) it is possible to have +libpng strip the channel leaving just RGB or gray data: + + if (color_type & PNG_COLOR_MASK_ALPHA) + png_set_strip_alpha(png_ptr); + +If you strip the alpha channel you need to find some other way of dealing with +the information. If, instead, you want to convert the image to an opaque +version with no alpha channel use png_set_background; see below. + +As of libpng version 1.5.2, almost all useful expansions are supported, the +major ommissions are conversion of grayscale to indexed images (which can be +done trivially in the application) and conversion of indexed to grayscale (which +can be done by a trivial manipulation of the palette.) In the following table, the 01 means grayscale with depth<8, 31 means indexed with depth<8, other numerals represent the color type, "T" means the tRNS chunk is present, A means an alpha channel is present, and O means tRNS or alpha is present but all pixels in the image are opaque. - FROM 01 31 0 0T 0O 2 2T 2O 3 3T 3O 4A 4O 6A 6O + FROM 01 31 0 0T 0O 2 2T 2O 3 3T 3O 4A 4O 6A 6O TO - 01 - - 31 - - 0 1 - - 0T - - 0O - - 2 GX - - 2T - - 2O - - 3 1 - - 3T - - 3O - - 4A T - - 4O - - 6A GX TX TX - - 6O GX TX - + 01 - [G] - - - - - - - - - - - - - + 31 [Q] Q [Q] [Q] [Q] Q Q Q Q Q Q [Q] [Q] Q Q + 0 1 G + . . G G G G G G B B GB GB + 0T lt Gt t + . Gt G G Gt G G Bt Bt GBt GBt + 0O lt Gt t . + Gt Gt G Gt Gt G Bt Bt GBt GBt + 2 C P C C C + . . C - - CB CB B B + 2T Ct - Ct C C t + t - - - CBt CBt Bt Bt + 2O Ct - Ct C C t t + - - - CBt CBt Bt Bt + 3 [Q] p [Q] [Q] [Q] Q Q Q + . . [Q] [Q] Q Q + 3T [Qt] p [Qt][Q] [Q] Qt Qt Qt t + t [Qt][Qt] Qt Qt + 3O [Qt] p [Qt][Q] [Q] Qt Qt Qt t t + [Qt][Qt] Qt Qt + 4A lA G A T T GA GT GT GA GT GT + BA G GBA + 4O lA GBA A T T GA GT GT GA GT GT BA + GBA G + 6A CA PA CA C C A T tT PA P P C CBA + BA + 6O CA PBA CA C C A tT T PA P P CBA C BA + Within the matrix, + "+" identifies entries where 'from' and 'to' are the same. "-" means the transformation is not supported. + "." means nothing is necessary (a tRNS chunk can just be ignored). + "t" means the transformation is obtained by png_set_tRNS. + "A" means the transformation is obtained by png_set_add_alpha(). "X" means the transformation is obtained by png_set_expand(). "1" means the transformation is obtained by - png_set_expand_gray_1_2_4_to_8 - "G" means the transformation is obtained by - png_set_gray_to_rgb(). + png_set_expand_gray_1_2_4_to_8() (and by png_set_expand() if there + is no transparency in the original or the final format). + "C" means the transformation is obtained by png_set_gray_to_rgb(). + "G" means the transformation is obtained by png_set_rgb_to_gray(). "P" means the transformation is obtained by png_set_expand_palette_to_rgb(). - "T" means the transformation is obtained by - png_set_tRNS_to_alpha(). - -PNG can have files with 16 bits per channel. If you only can handle -8 bits per channel, this will strip the pixels down to 8 bit. - - if (bit_depth == 16) - png_set_strip_16(png_ptr); - -If, for some reason, you don't need the alpha channel on an image, -and you want to remove it rather than combining it with the background -(but the image author certainly had in mind that you *would* combine -it with the background, so that's what you should probably do): - - if (color_type & PNG_COLOR_MASK_ALPHA) - png_set_strip_alpha(png_ptr); + "p" means the transformation is obtained by png_set_packing(). + "Q" means the transformation is obtained by png_set_quantize(). + "T" means the transformation is obtained by png_set_tRNS_to_alpha(). + "B" means the transformation is obtained by png_set_background(), or + png_strip_alpha(). + +When an entry has multiple transforms listed all are required to cause the +right overall transformation. When two transforms are separated by a comma +either will do the job. When transforms are enclosed in [] the transform should +do the job but this is currently unimplemented - a different format will result +if the suggested transformations are used. In PNG files, the alpha channel in an image is the level of opacity. If you need the alpha channel in an image to @@ -969,7 +1601,7 @@ files. This code expands to 1 pixel per byte without changing the values of the pixels: if (bit_depth < 8) - png_set_packing(png_ptr); + png_set_packing(png_ptr); PNG files have possible bit depths of 1, 2, 4, 8, and 16. All pixels stored in a PNG image have been "scaled" or "shifted" up to the next @@ -981,20 +1613,20 @@ image. This call reduces the pixels back down to the original bit depth: png_color_8p sig_bit; if (png_get_sBIT(png_ptr, info_ptr, &sig_bit)) - png_set_shift(png_ptr, sig_bit); + png_set_shift(png_ptr, sig_bit); PNG files store 3-color pixels in red, green, blue order. This code changes the storage of the pixels to blue, green, red: if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_bgr(png_ptr); + png_set_bgr(png_ptr); PNG files store RGB pixels packed into 3 or 6 bytes. This code expands them into 4 or 8 bytes for windowing systems that need them in this format: if (color_type == PNG_COLOR_TYPE_RGB) - png_set_filler(png_ptr, filler, PNG_FILLER_BEFORE); + png_set_filler(png_ptr, filler, PNG_FILLER_BEFORE); where "filler" is the 8 or 16-bit number to fill with, and the location is either PNG_FILLER_BEFORE or PNG_FILLER_AFTER, depending upon whether @@ -1007,8 +1639,8 @@ Note that png_set_filler() does not change the color type. If you want to do that, you can add a true alpha channel with if (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_GRAY) - png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER); + color_type == PNG_COLOR_TYPE_GRAY) + png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER); where "filler" contains the alpha value to assign to each pixel. This function was added in libpng-1.2.7. @@ -1017,175 +1649,157 @@ If you are reading an image with an alpha channel, and you need the data as ARGB instead of the normal PNG format RGBA: if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_swap_alpha(png_ptr); + png_set_swap_alpha(png_ptr); For some uses, you may want a grayscale image to be represented as RGB. This code will do that conversion: if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); + png_set_gray_to_rgb(png_ptr); Conversely, you can convert an RGB or RGBA image to grayscale or grayscale with alpha. if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_rgb_to_gray_fixed(png_ptr, error_action, - int red_weight, int green_weight); + png_set_rgb_to_gray(png_ptr, error_action, double red_weight, + double green_weight); error_action = 1: silently do the conversion + error_action = 2: issue a warning if the original image has any pixel where red != green or red != blue + error_action = 3: issue an error and abort the conversion if the original image has any pixel where red != green or red != blue - red_weight: weight of red component times 100000 - green_weight: weight of green component times 100000 + red_weight: weight of red component + + green_weight: weight of green component If either weight is negative, default - weights (21268, 71514) are used. + weights are used. + +In the corresponding fixed point API the red_weight and green_weight values are +simply scaled by 100,000: + + png_set_rgb_to_gray(png_ptr, error_action, png_fixed_point red_weight, + png_fixed_point green_weight); If you have set error_action = 1 or 2, you can later check whether the image really was gray, after processing the image rows, with the png_get_rgb_to_gray_status(png_ptr) function. It will return a png_byte that is zero if the image was gray or -1 if there were any non-gray pixels. bKGD and sBIT data +1 if there were any non-gray pixels. Background and sBIT data will be silently converted to grayscale, using the green channel -data, regardless of the error_action setting. - -With red_weight+green_weight<=100000, -the normalized graylevel is computed: +data for sBIT, regardless of the error_action setting. - int rw = red_weight * 65536; - int gw = green_weight * 65536; - int bw = 65536 - (rw + gw); - gray = (rw*red + gw*green + bw*blue)/65536; +The default values come from the PNG file cHRM chunk if present; otherwise, the +defaults correspond to the ITU-R recommendation 709, and also the sRGB color +space, as recommended in the Charles Poynton's Colour FAQ, +, in section 9: -The default values approximate those recommended in the Charles -Poynton's Color FAQ, -Copyright (c) 1998-01-04 Charles Poynton + - Y = 0.212671 * R + 0.715160 * G + 0.072169 * B + Y = 0.2126 * R + 0.7152 * G + 0.0722 * B -Libpng approximates this with +Previous versions of this document, 1998 through 2002, recommended a slightly +different formula: - Y = 0.21268 * R + 0.7151 * G + 0.07217 * B + Y = 0.212671 * R + 0.715160 * G + 0.072169 * B -which can be expressed with integers as +Libpng uses an integer approximation: - Y = (6969 * R + 23434 * G + 2365 * B)/32768 + Y = (6968 * R + 23434 * G + 2366 * B)/32768 The calculation is done in a linear colorspace, if the image gamma -is known. +can be determined. -If you have a grayscale and you are using png_set_expand_depth(), -png_set_expand(), or png_set_gray_to_rgb to change to truecolor or to -a higher bit-depth, you must either supply the background color as a gray -value at the original file bit-depth (need_expand = 1) or else supply the -background color as an RGB triplet at the final, expanded bit depth -(need_expand = 0). Similarly, if you are reading a paletted image, you -must either supply the background color as a palette index (need_expand = 1) -or as an RGB triplet that may or may not be in the palette (need_expand = 0). +The png_set_background() function has been described already; it tells libpng to +composite images with alpha or simple transparency against the supplied +background color. For compatibility with versions of libpng earlier than +libpng-1.5.4 it is recommended that you call the function after reading the file +header, even if you don't want to use the color in a bKGD chunk, if one exists. + +If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid), +you may use this color, or supply another color more suitable for +the current display (e.g., the background color from a web page). You +need to tell libpng how the color is represented, both the format of the +component values in the color (the number of bits) and the gamma encoding of the +color. The function takes two arguments, background_gamma_mode and need_expand +to convey this information, however only two combinations are likely to be +useful: png_color_16 my_background; png_color_16p image_background; if (png_get_bKGD(png_ptr, info_ptr, &image_background)) - png_set_background(png_ptr, image_background, - PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); + png_set_background(png_ptr, image_background, + PNG_BACKGROUND_GAMMA_FILE, 1/*needs to be expanded*/, 1); else - png_set_background(png_ptr, &my_background, - PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); + png_set_background(png_ptr, &my_background, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*do not expand*/, 1); + +The second call was described above - my_background is in the format of the +final, display, output produced by libpng. Because you now know the format of +the PNG it is possible to avoid the need to choose either 8-bit or 16-bit +output and to retain palette images (the palette colors will be modified +appropriately and the tRNS chunk removed.) However, if you are doing this, +take great care not to ask for transformations without checking first that +they apply! + +In the first call the background color has the original bit depth and color type +of the PNG file. So, for palette images the color is supplied as a palette +index and for low bit greyscale images the color is a reduced bit value in +image_background->gray. + +If you didn't call png_set_gamma() before reading the file header, for example +if you need your code to remain compatible with older versions of libpng prior +to libpng-1.5.4, this is the place to call it. + +Do not call it if you called png_set_alpha_mode(); doing so will damage the +settings put in place by png_set_alpha_mode(). (If png_set_alpha_mode() is +supported then you can certainly do png_set_gamma() before reading the PNG +header.) + +This API unconditionally sets the screen and file gamma values, so it will +override the value in the PNG file unless it is called before the PNG file +reading starts. For this reason you must always call it with the PNG file +value when you call it in this position: + + if (png_get_gAMA(png_ptr, info_ptr, &file_gamma)) + png_set_gamma(png_ptr, screen_gamma, file_gamma); -The png_set_background() function tells libpng to composite images -with alpha or simple transparency against the supplied background -color. If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid), -you may use this color, or supply another color more suitable for -the current display (e.g., the background color from a web page). You -need to tell libpng whether the color is in the gamma space of the -display (PNG_BACKGROUND_GAMMA_SCREEN for colors you supply), the file -(PNG_BACKGROUND_GAMMA_FILE for colors from the bKGD chunk), or one -that is neither of these gammas (PNG_BACKGROUND_GAMMA_UNIQUE - I don't -know why anyone would use this, but it's here). - -To properly display PNG images on any kind of system, the application needs -to know what the display gamma is. Ideally, the user will know this, and -the application will allow them to set it. One method of allowing the user -to set the display gamma separately for each system is to check for a -SCREEN_GAMMA or DISPLAY_GAMMA environment variable, which will hopefully be -correctly set. - -Note that display_gamma is the overall gamma correction required to produce -pleasing results, which depends on the lighting conditions in the surrounding -environment. In a dim or brightly lit room, no compensation other than -the physical gamma exponent of the monitor is needed, while in a dark room -a slightly smaller exponent is better. - - double gamma, screen_gamma; - - if (/* We have a user-defined screen - gamma value */) - { - screen_gamma = user_defined_screen_gamma; - } - /* One way that applications can share the same - screen gamma value */ - else if ((gamma_str = getenv("SCREEN_GAMMA")) - != NULL) - { - screen_gamma = (double)atof(gamma_str); - } - /* If we don't have another value */ - else - { - screen_gamma = 2.2; /* A good guess for a - PC monitor in a bright office or a dim room */ - screen_gamma = 2.0; /* A good guess for a - PC monitor in a dark room */ - screen_gamma = 1.7 or 1.0; /* A good - guess for Mac systems */ - } - -The png_set_gamma() function handles gamma transformations of the data. -Pass both the file gamma and the current screen_gamma. If the file does -not have a gamma value, you can pass one anyway if you have an idea what -it is (usually 0.45455 is a good guess for GIF images on PCs). Note -that file gammas are inverted from screen gammas. See the discussions -on gamma in the PNG specification for an excellent description of what -gamma is, and why all applications should support it. It is strongly -recommended that PNG viewers support gamma correction. - - if (png_get_gAMA(png_ptr, info_ptr, &gamma)) - png_set_gamma(png_ptr, screen_gamma, gamma); else png_set_gamma(png_ptr, screen_gamma, 0.45455); If you need to reduce an RGB file to a paletted file, or if a paletted file has more entries then will fit on your screen, png_set_quantize() -will do that. Note that this is a simple match dither that merely +will do that. Note that this is a simple match quantization that merely finds the closest color available. This should work fairly well with -optimized palettes, and fairly badly with linear color cubes. If you -pass a palette that is larger then maximum_colors, the file will +optimized palettes, but fairly badly with linear color cubes. If you +pass a palette that is larger than maximum_colors, the file will reduce the number of colors in the palette so it will fit into -maximum_colors. If there is a histogram, it will use it to make +maximum_colors. If there is a histogram, libpng will use it to make more intelligent choices when reducing the palette. If there is no histogram, it may not do as good a job. if (color_type & PNG_COLOR_MASK_COLOR) { if (png_get_valid(png_ptr, info_ptr, - PNG_INFO_PLTE)) + PNG_INFO_PLTE)) { png_uint_16p histogram = NULL; png_get_hIST(png_ptr, info_ptr, - &histogram); + &histogram); png_set_quantize(png_ptr, palette, num_palette, max_screen_colors, histogram, 1); } + else { png_color std_color_cube[MAX_SCREEN_COLORS] = @@ -1207,16 +1821,16 @@ zero): This function can also be used to invert grayscale and gray-alpha images: if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + color_type == PNG_COLOR_TYPE_GRAY_ALPHA) png_set_invert_mono(png_ptr); -PNG files store 16 bit pixels in network byte order (big-endian, +PNG files store 16-bit pixels in network byte order (big-endian, ie. most significant bits first). This code changes the storage to the other way (little-endian, i.e. least significant bits first, the way PCs store them): if (bit_depth == 16) - png_set_swap(png_ptr); + png_set_swap(png_ptr); If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you need to change the order the pixels are packed into bytes, you can use: @@ -1229,15 +1843,36 @@ the existing ones meets your needs. This is done by setting a callback with png_set_read_user_transform_fn(png_ptr, - read_transform_fn); + read_transform_fn); You must supply the function - void read_transform_fn(png_ptr ptr, row_info_ptr - row_info, png_bytep data) + void read_transform_fn(png_structp png_ptr, png_row_infop + row_info, png_bytep data) See pngtest.c for a working example. Your function will be called -after all of the other transformations have been processed. +after all of the other transformations have been processed. Take care with +interlaced images if you do the interlace yourself - the width of the row is the +width in 'row_info', not the overall image width. + +If supported, libpng provides two information routines that you can use to find +where you are in processing the image: + + png_get_current_pass_number(png_structp png_ptr); + png_get_current_row_number(png_structp png_ptr); + +Don't try using these outside a transform callback - firstly they are only +supported if user transforms are supported, secondly they may well return +unexpected results unless the row is actually being processed at the moment they +are called. + +With interlaced +images the value returned is the row in the input sub-image image. Use +PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to +find the output pixel (x,y) given an interlaced sub-image pixel (row,col,pass). + +The discussion of interlace handling above contains more information on how to +use these values. You can also set up a pointer to a user structure for use by your callback function, and you can inform libpng that your transform @@ -1245,7 +1880,7 @@ function will change the number of channels or bit depth with the function png_set_user_transform_info(png_ptr, user_ptr, - user_depth, user_channels); + user_depth, user_channels); The user's application, not libpng, is responsible for allocating and freeing any memory required for the user structure. @@ -1254,7 +1889,7 @@ You can retrieve the pointer via the function png_get_user_transform_ptr(). For example: voidp read_user_transform_ptr = - png_get_user_transform_ptr(png_ptr); + png_get_user_transform_ptr(png_ptr); The last thing to handle is interlacing; this is covered in detail below, but you must call the function here if you want libpng to handle expansion @@ -1264,13 +1899,16 @@ of the interlaced image. After setting the transformations, libpng can update your png_info structure to reflect any transformations you've requested with this -call. This is most useful to update the info structure's rowbytes -field so you can use it to allocate your image memory. This function -will also update your palette with the correct screen_gamma and -background if these have been given with the calls above. +call. png_read_update_info(png_ptr, info_ptr); +This is most useful to update the info structure's rowbytes +field so you can use it to allocate your image memory. This function +will also update your palette with the correct screen_gamma and +background if these have been given with the calls above. You may +only call png_read_update_info() once with a particular info_ptr. + After you call png_read_update_info(), you can allocate any memory you need to hold the image. The row data is simply raw byte data for all forms of images. As the actual allocation @@ -1279,6 +1917,15 @@ are allocating one large chunk, you will need to build an array of pointers to each row, as it will be needed for some of the functions below. +Remember: Before you call png_read_update_info(), the png_get_*() +functions return the values corresponding to the original PNG image. +After you call png_read_update_info the values refer to the image +that libpng will output. Consequently you must call all the png_set_ +functions before you call png_read_update_info(). This is particularly +important for png_set_interlace_handling() - if you are going to call +png_read_update_info() you must call png_set_interlace_handling() before +it unless you want to receive interlaced output. + Reading image data After you've allocated memory, you can read the image data. @@ -1288,9 +1935,10 @@ call png_read_image() and libpng will read in all the image data and put it in the memory area supplied. You will need to pass in an array of pointers to each row. -This function automatically handles interlacing, so you don't need -to call png_set_interlace_handling() or call this function multiple -times, or any of that other stuff necessary with png_read_rows(). +This function automatically handles interlacing, so you don't +need to call png_set_interlace_handling() (unless you call +png_read_update_info()) or call this function multiple times, or any +of that other stuff necessary with png_read_rows(). png_read_image(png_ptr, row_pointers); @@ -1305,7 +1953,7 @@ use png_read_rows() instead. If there is no interlacing (check interlace_type == PNG_INTERLACE_NONE), this is simple: png_read_rows(png_ptr, row_pointers, NULL, - number_of_rows); + number_of_rows); where row_pointers is the same as in the png_read_image() call. @@ -1317,13 +1965,15 @@ a single row_pointer instead of an array of row_pointers: If the file is interlaced (interlace_type != 0 in the IHDR chunk), things get somewhat harder. The only current (PNG Specification version 1.2) -interlacing type for PNG is (interlace_type == PNG_INTERLACE_ADAM7) -is a somewhat complicated 2D interlace scheme, known as Adam7, that +interlacing type for PNG is (interlace_type == PNG_INTERLACE_ADAM7); +a somewhat complicated 2D interlace scheme, known as Adam7, that breaks down an image into seven smaller images of varying size, based -on an 8x8 grid. +on an 8x8 grid. This number is defined (from libpng 1.5) as +PNG_INTERLACE_ADAM7_PASSES in png.h libpng can fill out those images or it can give them to you "as is". -If you want them filled out, there are two ways to do that. The one +It is almost always better to have libpng handle the interlacing for you. +If you want the images filled out, there are two ways to do that. The one mentioned in the PNG specification is to expand each pixel to cover those pixels that have not been read yet (the "rectangle" method). This results in a blocky image for the first pass, which gradually @@ -1333,37 +1983,20 @@ rest of the image remaining whatever colors they were initialized to before the start of the read. The first method usually looks better, but tends to be slower, as there are more pixels to put in the rows. -If you don't want libpng to handle the interlacing details, just call -png_read_rows() seven times to read in all seven images. Each of the -images is a valid image by itself, or they can all be combined on an -8x8 grid to form a single image (although if you intend to combine them -you would be far better off using the libpng interlace handling). - -The first pass will return an image 1/8 as wide as the entire image -(every 8th column starting in column 0) and 1/8 as high as the original -(every 8th row starting in row 0), the second will be 1/8 as wide -(starting in column 4) and 1/8 as high (also starting in row 0). The -third pass will be 1/4 as wide (every 4th pixel starting in column 0) and -1/8 as high (every 8th row starting in row 4), and the fourth pass will -be 1/4 as wide and 1/4 as high (every 4th column starting in column 2, -and every 4th row starting in row 0). The fifth pass will return an -image 1/2 as wide, and 1/4 as high (starting at column 0 and row 2), -while the sixth pass will be 1/2 as wide and 1/2 as high as the original -(starting in column 1 and row 0). The seventh and final pass will be as -wide as the original, and 1/2 as high, containing all of the odd -numbered scanlines. Phew! - -If you want libpng to expand the images, call this before calling -png_start_read_image() or png_read_update_info(): +If, as is likely, you want libpng to expand the images, call this before +calling png_start_read_image() or png_read_update_info(): if (interlace_type == PNG_INTERLACE_ADAM7) - number_of_passes + number_of_passes = png_set_interlace_handling(png_ptr); -This will return the number of passes needed. Currently, this -is seven, but may change if another interlace type is added. -This function can be called even if the file is not interlaced, -where it will return one pass. +This will return the number of passes needed. Currently, this is seven, +but may change if another interlace type is added. This function can be +called even if the file is not interlaced, where it will return one pass. +You then need to read the whole image 'number_of_passes' times. Each time +will distribute the pixels from the current pass to the correct place in +the output image, so you need to supply the same rows to png_read_rows in +each pass. If you are not going to display the image after each pass, but are going to wait until the entire image is read in, use the sparkle @@ -1380,14 +2013,104 @@ not the data. Each pass only writes the pixels appropriate for that pass, and assumes the data from previous passes is still valid. png_read_rows(png_ptr, row_pointers, NULL, - number_of_rows); + number_of_rows); If you only want the first effect (the rectangles), do the same as before except pass the row buffer in the third parameter, and leave the second parameter NULL. png_read_rows(png_ptr, NULL, row_pointers, - number_of_rows); + number_of_rows); + +If you don't want libpng to handle the interlacing details, just call +png_read_rows() PNG_INTERLACE_ADAM7_PASSES times to read in all the images. +Each of the images is a valid image by itself, however you will almost +certainly need to distribute the pixels from each sub-image to the +correct place. This is where everything gets very tricky. + +If you want to retrieve the separate images you must pass the correct +number of rows to each successive call of png_read_rows(). The calculation +gets pretty complicated for small images, where some sub-images may +not even exist because either their width or height ends up zero. +libpng provides two macros to help you in 1.5 and later versions: + + png_uint_32 width = PNG_PASS_COLS(image_width, pass_number); + png_uint_32 height = PNG_PASS_ROWS(image_height, pass_number); + +Respectively these tell you the width and height of the sub-image +corresponding to the numbered pass. 'pass' is in in the range 0 to 6 - +this can be confusing because the specification refers to the same passes +as 1 to 7! Be careful, you must check both the width and height before +calling png_read_rows() and not call it for that pass if either is zero. + +You can, of course, read each sub-image row by row. If you want to +produce optimal code to make a pixel-by-pixel transformation of an +interlaced image this is the best approach; read each row of each pass, +transform it, and write it out to a new interlaced image. + +If you want to de-interlace the image yourself libpng provides further +macros to help that tell you where to place the pixels in the output image. +Because the interlacing scheme is rectangular - sub-image pixels are always +arranged on a rectangular grid - all you need to know for each pass is the +starting column and row in the output image of the first pixel plus the +spacing between each pixel. As of libpng 1.5 there are four macros to +retrieve this information: + + png_uint_32 x = PNG_PASS_START_COL(pass); + png_uint_32 y = PNG_PASS_START_ROW(pass); + png_uint_32 xStep = 1U << PNG_PASS_COL_SHIFT(pass); + png_uint_32 yStep = 1U << PNG_PASS_ROW_SHIFT(pass); + +These allow you to write the obvious loop: + + png_uint_32 input_y = 0; + png_uint_32 output_y = PNG_PASS_START_ROW(pass); + + while (output_y < output_image_height) + { + png_uint_32 input_x = 0; + png_uint_32 output_x = PNG_PASS_START_COL(pass); + + while (output_x < output_image_width) + { + image[output_y][output_x] = + subimage[pass][input_y][input_x++]; + + output_x += xStep; + } + + ++input_y; + output_y += yStep; + } + +Notice that the steps between successive output rows and columns are +returned as shifts. This is possible because the pixels in the subimages +are always a power of 2 apart - 1, 2, 4 or 8 pixels - in the original +image. In practice you may need to directly calculate the output coordinate +given an input coordinate. libpng provides two further macros for this +purpose: + + png_uint_32 output_x = PNG_COL_FROM_PASS_COL(input_x, pass); + png_uint_32 output_y = PNG_ROW_FROM_PASS_ROW(input_y, pass); + +Finally a pair of macros are provided to tell you if a particular image +row or column appears in a given pass: + + int col_in_pass = PNG_COL_IN_INTERLACE_PASS(output_x, pass); + int row_in_pass = PNG_ROW_IN_INTERLACE_PASS(output_y, pass); + +Bear in mind that you will probably also need to check the width and height +of the pass in addition to the above to be sure the pass even exists! + +With any luck you are convinced by now that you don't want to do your own +interlace handling. In reality normally the only good reason for doing this +is if you are processing PNG files on a pixel-by-pixel basis and don't want +to load the whole file into memory when it is interlaced. + +libpng includes a test program, pngvalid, that illustrates reading and +writing of interlaced images. If you can't get interlacing to work in your +code and don't want to leave it to libpng (the recommended approach), see +how pngvalid.c does it. Finishing a sequential read @@ -1396,19 +2119,44 @@ low-level interface, you can finish reading the file. If you are interested in comments or time, which may be stored either before or after the image data, you should pass the separate png_info struct if you want to keep the comments from before and after the image -separate. If you are not interested, you can pass NULL. +separate. + + png_infop end_info = png_create_info_struct(png_ptr); + + if (!end_info) + { + png_destroy_read_struct(&png_ptr, &info_ptr, + (png_infopp)NULL); + return (ERROR); + } png_read_end(png_ptr, end_info); +If you are not interested, you should still call png_read_end() +but you can pass NULL, avoiding the need to create an end_info structure. + + png_read_end(png_ptr, (png_infop)NULL); + +If you don't call png_read_end(), then your file pointer will be +left pointing to the first chunk after the last IDAT, which is probably +not what you want if you expect to read something beyond the end of +the PNG datastream. + When you are done, you can free all memory allocated by libpng like this: png_destroy_read_struct(&png_ptr, &info_ptr, &end_info); +or, if you didn't create an end_info structure, + + png_destroy_read_struct(&png_ptr, &info_ptr, + (png_infopp)NULL); + It is also possible to individually free the info_ptr members that point to libpng-allocated storage with the following function: png_free_data(png_ptr, info_ptr, mask, seq) + mask - identifies data to be freed, a mask containing the bitwise OR of one or more of @@ -1418,6 +2166,7 @@ point to libpng-allocated storage with the following function: PNG_FREE_SCAL, PNG_FREE_SPLT, PNG_FREE_TEXT, PNG_FREE_UNKN, or simply PNG_FREE_ALL + seq - sequence number of item to be freed (-1 for all items) @@ -1435,13 +2184,15 @@ or so that it will free data that was allocated by the user with png_malloc() or png_zalloc() and passed in via a png_set_*() function, with png_data_freer(png_ptr, info_ptr, freer, mask) - mask - which data elements are affected - same choices as in png_free_data() + freer - one of PNG_DESTROY_WILL_FREE_DATA PNG_SET_WILL_FREE_DATA PNG_USER_WILL_FREE_DATA + mask - which data elements are affected + same choices as in png_free_data() + This function only affects data that has already been allocated. You can call this function after reading the PNG data but before calling any png_set_*() functions, to control whether the user or the png_set_*() @@ -1470,6 +2221,7 @@ it frees. If you need to turn the flag off for a chunk that was freed by your application instead of by libpng, you can use png_set_invalid(png_ptr, info_ptr, mask); + mask - identifies the chunks to be made invalid, containing the bitwise OR of one or more of @@ -1509,21 +2261,24 @@ png_infop info_ptr; png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, user_error_fn, user_warning_fn); + if (!png_ptr) return (ERROR); + info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) { - png_destroy_read_struct(&png_ptr, (png_infopp)NULL, - (png_infopp)NULL); - return (ERROR); + png_destroy_read_struct(&png_ptr, + (png_infopp)NULL, (png_infopp)NULL); + return (ERROR); } if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); + png_destroy_read_struct(&png_ptr, &info_ptr, + (png_infopp)NULL); + return (ERROR); } /* This one's new. You can provide functions @@ -1555,9 +2310,9 @@ png_infop info_ptr; { if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, + png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL); - return (ERROR); + return (ERROR); } /* This one's new also. Simply give it a chunk @@ -1574,6 +2329,12 @@ png_infop info_ptr; so there. */ png_process_data(png_ptr, info_ptr, buffer, length); + + /* At this point you can call png_process_data_skip if + you want to handle data the library will skip yourself; + it simply returns the number of bytes to skip (and stops + libpng skipping that number of bytes on the next + png_process_data call). return 0; } @@ -1594,6 +2355,19 @@ png_infop info_ptr; any). You may start getting rows before png_process_data() returns, so this is your last chance to prepare for that. + + This is where you turn on interlace handling, + assuming you don't want to do it yourself. + + If you need to you can stop the processing of + your original input data at this point by calling + png_process_data_pause. This returns the number + of unprocessed bytes from the last png_process_data + call - it is up to you to ensure that the next call + sees these bytes again. If you don't want to bother + with this you can get libpng to cache the unread + bytes by setting the 'save' parameter (see png.h) but + then libpng will have to copy the data internally. */ } @@ -1614,14 +2388,22 @@ png_infop info_ptr; supplying them because it may make your life easier. - For the non-NULL rows of interlaced images, + If you did not turn on interlace handling then + the callback is called for each row of each + sub-image when the image is interlaced. In this + case 'row_num' is the row in the sub-image, not + the row in the output image as it is in all other + cases. + + For the non-NULL rows of interlaced images when + you have switched on libpng interlace handling, you must call png_progressive_combine_row() passing in the row and the old row. You can call this function for NULL rows (it will just return) and for non-interlaced images (it just does the memcpy for you) if it will make the code easier. Thus, you can just do this for - all cases: + all cases if you switch on interlace handling; */ png_progressive_combine_row(png_ptr, old_row, @@ -1635,6 +2417,9 @@ png_infop info_ptr; for interlaced images), you will have to pass the current row, and the function will combine the old row and the new row. + + You can also call png_process_data_pause in this + callback - see above. */ } @@ -1669,10 +2454,9 @@ using the standard I/O functions, you will need to replace them with custom writing functions. See the discussion under Customizing libpng. FILE *fp = fopen(file_name, "wb"); + if (!fp) - { return (ERROR); - } Next, png_struct and png_info need to be allocated and initialized. As these can be both relatively large, you may not want to store these @@ -1685,6 +2469,7 @@ both "png_ptr"; you can call them anything you like, such as png_structp png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, user_error_fn, user_warning_fn); + if (!png_ptr) return (ERROR); @@ -1692,7 +2477,7 @@ both "png_ptr"; you can call them anything you like, such as if (!info_ptr) { png_destroy_write_struct(&png_ptr, - (png_infopp)NULL); + (png_infopp)NULL); return (ERROR); } @@ -1718,7 +2503,7 @@ section below for more information on the libpng error handling. if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_write_struct(&png_ptr, &info_ptr); + png_destroy_write_struct(&png_ptr, &info_ptr); fclose(fp); return (ERROR); } @@ -1757,7 +2542,7 @@ called after each row has been written, which you can use to control a progress meter or the like. It's demonstrated in pngtest.c. You must supply a function - void write_row_callback(png_ptr, png_uint_32 row, + void write_row_callback(png_structp png_ptr, png_uint_32 row, int pass); { /* put your code here */ @@ -1769,6 +2554,20 @@ To inform libpng about your function, use png_set_write_status_fn(png_ptr, write_row_callback); +When this function is called the row has already been completely processed and +it has also been written out. The 'row' and 'pass' refer to the next row to be +handled. For the +non-interlaced case the row that was just handled is simply one less than the +passed in row number, and pass will always be 0. For the interlaced case the +same applies unless the row value is 0, in which case the row just handled was +the last one from one of the preceding passes. Because interlacing may skip a +pass you cannot be sure that the preceding pass is just 'pass-1', if you really +need to know what the last pass is record (row,pass) from the callback and use +the last recorded value each time. + +As with the user transform you can find the output row using the +PNG_ROW_FROM_PASS_ROW macro. + You now have the option of modifying how the compression library will run. The following functions are mainly for testing, but may be useful in some cases, like if you need to write PNG files extremely fast and @@ -1788,7 +2587,8 @@ filter types. /* turn on or off filtering, and/or choose specific filters. You can use either a single PNG_FILTER_VALUE_NAME or the bitwise OR of one - or more PNG_FILTER_NAME masks. */ + or more PNG_FILTER_NAME masks. + */ png_set_filter(png_ptr, 0, PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE | PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB | @@ -1797,11 +2597,10 @@ filter types. PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH| PNG_ALL_FILTERS); -If an application -wants to start and stop using particular filters during compression, -it should start out with all of the filters (to ensure that the previous -row of pixels will be stored in case it's needed later), and then add -and remove them after the start of compression. +If an application wants to start and stop using particular filters during +compression, it should start out with all of the filters (to ensure that +the previous row of pixels will be stored in case it's needed later), +and then add and remove them after the start of compression. If you are writing a PNG datastream that is to be embedded in a MNG datastream, the second parameter can be either 0 or 64. @@ -1813,11 +2612,13 @@ which changes how much time zlib spends on trying to compress the image data. See the Compression Library (zlib.h and algorithm.txt, distributed with zlib) for details on the compression levels. - /* set the zlib compression level */ + #include zlib.h + + /* Set the zlib compression level */ png_set_compression_level(png_ptr, Z_BEST_COMPRESSION); - /* set other zlib parameters */ + /* Set other zlib parameters for compressing IDAT */ png_set_compression_mem_level(png_ptr, 8); png_set_compression_strategy(png_ptr, Z_DEFAULT_STRATEGY); @@ -1825,7 +2626,15 @@ with zlib) for details on the compression levels. png_set_compression_method(png_ptr, 8); png_set_compression_buffer_size(png_ptr, 8192) -extern PNG_EXPORT(void,png_set_zbuf_size) + /* Set zlib parameters for text compression + * If you don't call these, the parameters + * fall back on those defined for IDAT chunks + */ + png_set_text_compression_mem_level(png_ptr, 8); + png_set_text_compression_strategy(png_ptr, + Z_DEFAULT_STRATEGY); + png_set_text_compression_window_bits(png_ptr, 15); + png_set_text_compression_method(png_ptr, 8); Setting the contents of info for output @@ -1845,16 +2654,20 @@ Some of the more important parts of the png_info are: png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, color_type, interlace_type, compression_type, filter_method) + width - holds the width of the image in pixels (up to 2^31). + height - holds the height of the image in pixels (up to 2^31). + bit_depth - holds the bit depth of one of the image channels. (valid values are 1, 2, 4, 8, 16 and depend also on the color_type. See also significant bits (sBIT) below). + color_type - describes which color/alpha channels are present. PNG_COLOR_TYPE_GRAY @@ -1874,8 +2687,10 @@ Some of the more important parts of the png_info are: interlace_type - PNG_INTERLACE_NONE or PNG_INTERLACE_ADAM7 + compression_type - (must be PNG_COMPRESSION_TYPE_DEFAULT) + filter_method - (must be PNG_FILTER_TYPE_DEFAULT or, if you are writing a PNG to be embedded in a MNG datastream, @@ -1893,15 +2708,44 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_PLTE(png_ptr, info_ptr, palette, num_palette); + palette - the palette for the file (array of png_color) num_palette - number of entries in the palette - png_set_gAMA(png_ptr, info_ptr, gamma); - gamma - the gamma the image was created - at (PNG_INFO_gAMA) + png_set_gAMA(png_ptr, info_ptr, file_gamma); + png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); + + file_gamma - the gamma at which the image was + created (PNG_INFO_gAMA) + + int_file_gamma - 100,000 times the gamma at which + the image was created + + png_set_cHRM(png_ptr, info_ptr, white_x, white_y, red_x, red_y, + green_x, green_y, blue_x, blue_y) + png_set_cHRM_XYZ(png_ptr, info_ptr, red_X, red_Y, red_Z, green_X, + green_Y, green_Z, blue_X, blue_Y, blue_Z) + png_set_cHRM_fixed(png_ptr, info_ptr, int_white_x, int_white_y, + int_red_x, int_red_y, int_green_x, int_green_y, + int_blue_x, int_blue_y) + png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, int_red_X, int_red_Y, + int_red_Z, int_green_X, int_green_Y, int_green_Z, + int_blue_X, int_blue_Y, int_blue_Z) + + {white,red,green,blue}_{x,y} + A color space encoding specified using the chromaticities + of the end points and the white point. + + {red,green,blue}_{X,Y,Z} + A color space encoding specified using the encoding end + points - the CIE tristimulus specification of the intended + color of the red, green and blue channels in the PNG RGB + data. The white point is simply the sum of the three end + points. png_set_sRGB(png_ptr, info_ptr, srgb_intent); + srgb_intent - the rendering intent (PNG_INFO_sRGB) The presence of the sRGB chunk means that the pixel @@ -1921,6 +2765,7 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, srgb_intent); + srgb_intent - the rendering intent (PNG_INFO_sRGB) The presence of the sRGB chunk means that the pixel @@ -1931,17 +2776,22 @@ width, height, bit_depth, and color_type must be the same in each call. written. png_set_iCCP(png_ptr, info_ptr, name, compression_type, - profile, proflen); - name - The profile name. - compression - The compression type; always - PNG_COMPRESSION_TYPE_BASE for PNG 1.0. - You may give NULL to this argument to - ignore it. - profile - International Color Consortium color - profile data. May contain NULs. - proflen - length of profile data in bytes. + profile, proflen); + + name - The profile name. + + compression_type - The compression type; always + PNG_COMPRESSION_TYPE_BASE for PNG 1.0. + You may give NULL to this argument to + ignore it. + + profile - International Color Consortium color + profile data. May contain NULs. + + proflen - length of profile data in bytes. png_set_sBIT(png_ptr, info_ptr, sig_bit); + sig_bit - the number of significant bits for (PNG_INFO_sBIT) each of the gray, red, green, and blue channels, whichever are @@ -1950,30 +2800,38 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_tRNS(png_ptr, info_ptr, trans_alpha, num_trans, trans_color); + trans_alpha - array of alpha (transparency) entries for palette (PNG_INFO_tRNS) + + num_trans - number of transparent entries + (PNG_INFO_tRNS) + trans_color - graylevel or color sample values (in order red, green, blue) of the single transparent color for non-paletted images (PNG_INFO_tRNS) - num_trans - number of transparent entries - (PNG_INFO_tRNS) png_set_hIST(png_ptr, info_ptr, hist); - (PNG_INFO_hIST) + hist - histogram of palette (array of - png_uint_16) + png_uint_16) (PNG_INFO_hIST) png_set_tIME(png_ptr, info_ptr, mod_time); + mod_time - time image was last modified (PNG_VALID_tIME) png_set_bKGD(png_ptr, info_ptr, background); - background - background color (PNG_VALID_bKGD) + + background - background color (of type + png_color_16p) (PNG_VALID_bKGD) png_set_text(png_ptr, info_ptr, text_ptr, num_text); + text_ptr - array of png_text holding image comments + text_ptr[i].compression - type of compression used on "text" PNG_TEXT_COMPRESSION_NONE PNG_TEXT_COMPRESSION_zTXt @@ -1994,11 +2852,14 @@ width, height, bit_depth, and color_type must be the same in each call. Note that the itxt_length, lang, and lang_key members of the text_ptr structure only exist when the library is built with iTXt chunk support. + Prior to libpng-1.4.0 the library was built by default + without iTXt support. num_text - number of comments png_set_sPLT(png_ptr, info_ptr, &palette_ptr, num_spalettes); + palette_ptr - array of png_sPLT_struct structures to be added to the list of palettes in the info structure. @@ -2007,35 +2868,49 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type); + offset_x - positive offset from the left edge of the screen + offset_y - positive offset from the top edge of the screen + unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER png_set_pHYs(png_ptr, info_ptr, res_x, res_y, unit_type); + res_x - pixels/unit physical resolution in x direction + res_y - pixels/unit physical resolution in y direction + unit_type - PNG_RESOLUTION_UNKNOWN, PNG_RESOLUTION_METER png_set_sCAL(png_ptr, info_ptr, unit, width, height) + unit - physical scale units (an integer) + width - width of a pixel in physical scale units + height - height of a pixel in physical scale units (width and height are doubles) png_set_sCAL_s(png_ptr, info_ptr, unit, width, height) + unit - physical scale units (an integer) + width - width of a pixel in physical scale units + expressed as a string + height - height of a pixel in physical scale units (width and height are strings like "2.54") png_set_unknown_chunks(png_ptr, info_ptr, &unknowns, num_unknowns) + unknowns - array of png_unknown_chunk structures holding unknown chunks unknowns[i].name - name of unknown chunk @@ -2070,25 +2945,34 @@ Because tEXt and zTXt chunks don't have a language field, if you specify PNG_TEXT_COMPRESSION_NONE or PNG_TEXT_COMPRESSION_zTXt any language code or translated keyword will not be written out. -Until text gets around 1000 bytes, it is not worth compressing it. +Until text gets around a few hundred bytes, it is not worth compressing it. After the text has been written out to the file, the compression type is set to PNG_TEXT_COMPRESSION_NONE_WR or PNG_TEXT_COMPRESSION_zTXt_WR, so that it isn't written out again at the end (in case you are calling -png_write_end() with the same struct. +png_write_end() with the same struct). The keywords that are given in the PNG Specification are: Title Short (one line) title or caption for image + Author Name of image's creator + Description Description of image (possibly long) + Copyright Copyright notice + Creation Time Time of original image creation (usually RFC 1123 format, see below) + Software Software used to create the image + Disclaimer Legal disclaimer + Warning Warning of nature of content + Source Device used to create the image + Comment Miscellaneous comment; conversion from other image format @@ -2258,17 +3142,19 @@ file so that decoders can recover the original data if desired. /* Set the true bit depth of the image data */ if (color_type & PNG_COLOR_MASK_COLOR) { - sig_bit.red = true_bit_depth; - sig_bit.green = true_bit_depth; - sig_bit.blue = true_bit_depth; + sig_bit.red = true_bit_depth; + sig_bit.green = true_bit_depth; + sig_bit.blue = true_bit_depth; } + else { - sig_bit.gray = true_bit_depth; + sig_bit.gray = true_bit_depth; } + if (color_type & PNG_COLOR_MASK_ALPHA) { - sig_bit.alpha = true_bit_depth; + sig_bit.alpha = true_bit_depth; } png_set_sBIT(png_ptr, info_ptr, &sig_bit); @@ -2280,7 +3166,7 @@ is required by PNG. png_set_shift(png_ptr, &sig_bit); -PNG files store 16 bit pixels in network byte order (big-endian, +PNG files store 16-bit pixels in network byte order (big-endian, ie. most significant bits first). This code would be used if they are supplied the other way (little-endian, i.e. least significant bits first, the way PCs store them): @@ -2314,11 +3200,24 @@ with You must supply the function - void write_transform_fn(png_ptr ptr, row_info_ptr + void write_transform_fn(png_structp png_ptr, png_row_infop row_info, png_bytep data) See pngtest.c for a working example. Your function will be called -before any of the other transformations are processed. +before any of the other transformations are processed. If supported +libpng also supplies an information routine that may be called from +your callback: + + png_get_current_row_number(png_ptr); + png_get_current_pass_number(png_ptr); + +This returns the current row passed to the transform. With interlaced +images the value returned is the row in the input sub-image image. Use +PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to +find the output pixel (x,y) given an interlaced sub-image pixel (row,col,pass). + +The discussion of interlace handling above contains more information on how to +use these values. You can also set up a pointer to a user structure for use by your callback function. @@ -2400,25 +3299,39 @@ for details of which pixels to write when. If you don't want libpng to handle the interlacing details, just use png_set_interlace_handling() and call png_write_rows() the -correct number of times to write all seven sub-images. +correct number of times to write all the sub-images +(png_set_interlace_handling() returns the number of sub-images.) If you want libpng to build the sub-images, call this before you start writing any rows: - number_of_passes = - png_set_interlace_handling(png_ptr); + number_of_passes = png_set_interlace_handling(png_ptr); This will return the number of passes needed. Currently, this is seven, but may change if another interlace type is added. Then write the complete image number_of_passes times. - png_write_rows(png_ptr, row_pointers, - number_of_rows); + png_write_rows(png_ptr, row_pointers, number_of_rows); + +Think carefully before you write an interlaced image. Typically code that +reads such images reads all the image data into memory, uncompressed, before +doing any processing. Only code that can display an image on the fly can +take advantage of the interlacing and even then the image has to be exactly +the correct size for the output device, because scaling an image requires +adjacent pixels and these are not available until all the passes have been +read. + +If you do write an interlaced image you will hardly ever need to handle +the interlacing yourself. Call png_set_interlace_handling() and use the +approach described above. -As some of these rows are not used, and thus return immediately, you may -want to read about interlacing in the PNG specification, and only update -the rows that are actually used. +The only time it is conceivable that you will really need to write an +interlaced image pass-by-pass is when you have read one pass by pass and +made some pixel-by-pixel transformation to it, as described in the read +code above. In this case use the PNG_PASS_ROWS and PNG_PASS_COLS macros +to determine the size of each sub-image in turn and simply write the rows +you obtained from the read code. Finishing a sequential write @@ -2437,6 +3350,7 @@ It is also possible to individually free the info_ptr members that point to libpng-allocated storage with the following function: png_free_data(png_ptr, info_ptr, mask, seq) + mask - identifies data to be freed, a mask containing the bitwise OR of one or more of @@ -2446,6 +3360,7 @@ point to libpng-allocated storage with the following function: PNG_FREE_SCAL, PNG_FREE_SPLT, PNG_FREE_TEXT, PNG_FREE_UNKN, or simply PNG_FREE_ALL + seq - sequence number of item to be freed (-1 for all items) @@ -2467,19 +3382,22 @@ or so that it will free data that was allocated by the user with png_malloc() or png_zalloc() and passed in via a png_set_*() function, with png_data_freer(png_ptr, info_ptr, freer, mask) - mask - which data elements are affected - same choices as in png_free_data() + freer - one of PNG_DESTROY_WILL_FREE_DATA PNG_SET_WILL_FREE_DATA PNG_USER_WILL_FREE_DATA + mask - which data elements are affected + same choices as in png_free_data() + For example, to transfer responsibility for some data from a read structure to a write structure, you could use png_data_freer(read_ptr, read_info_ptr, PNG_USER_WILL_FREE_DATA, PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST) + png_data_freer(write_ptr, write_info_ptr, PNG_DESTROY_WILL_FREE_DATA, PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST) @@ -2526,9 +3444,11 @@ these functions, call the appropriate png_set_*_fn() function. Memory allocation is done through the functions png_malloc(), png_calloc(), and png_free(). These currently just call the standard C functions. -png_calloc() calls png_malloc() and then png_memset() to clear the newly -allocated memory to zero. If your pointers can't access more then 64K -at a time, you will want to set MAXSEG_64K in zlib.h. Since it is +png_calloc() calls png_malloc() and then clears the newly +allocated memory to zero. There is limited support for certain systems +with segmented memory architectures and the types of pointers declared by +png.h match this; you will have to use appropriate pointers in your +application. Since it is unlikely that the method of handling memory allocation on a platform will change between applications, these functions must be modified in the library at compile time. If you prefer to use a different method @@ -2543,6 +3463,7 @@ Your replacement memory functions must have prototypes as follows: png_voidp malloc_fn(png_structp png_ptr, png_alloc_size_t size); + void free_fn(png_structp png_ptr, png_voidp ptr); Your malloc_fn() must return NULL in case of failure. The png_malloc() @@ -2575,8 +3496,10 @@ The replacement I/O functions must have prototypes as follows: void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length); + void user_write_data(png_structp png_ptr, png_bytep data, png_size_t length); + void user_flush_data(png_structp png_ptr); The user_read_data() function is responsible for detecting and @@ -2621,6 +3544,7 @@ parameters as follows: void user_error_fn(png_structp png_ptr, png_const_charp error_msg); + void user_warning_fn(png_structp png_ptr, png_const_charp warning_msg); @@ -2631,7 +3555,8 @@ However, there are some uncertainties about the status of local variables after a longjmp, so the user may want to be careful about doing anything after setjmp returns non-zero besides returning itself. Consult your compiler documentation for more details. For an alternative approach, you -may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net). +may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net), +which is illustrated in pngvalid.c and in contrib/visupng. Custom chunks @@ -2649,8 +3574,11 @@ and look at how other chunks were designed, so you can do things similarly. Second, check out the sections of libpng that read and write chunks. Try to find a chunk that is similar to yours and use it as a template. More details can be found in the comments inside -the code. It is best to handle unknown chunks in a generic method, -via callback functions, instead of by modifying libpng functions. +the code. It is best to handle private or unknown chunks in a generic method, +via callback functions, instead of by modifying libpng functions. This +is illustrated in pngtest.c, which uses a callback function to handle a +private "vpAg" chunk and the new "sTER" chunk, which are both unknown to +libpng. If you wish to write your own transformation for the data, look through the part of the code that does the transformations, and check out some of @@ -2658,7 +3586,7 @@ the simpler ones to get an idea of how they work. Try to find a similar transformation to the one you want to add and copy off of it. More details can be found in the comments inside the code itself. -Configuring for 16 bit platforms +Configuring for 16-bit platforms You will want to look into zconf.h to tell zlib (and thus libpng) that it cannot allocate more then 64K at a time. Even if you can, the memory @@ -2678,8 +3606,8 @@ defined, and FAR gets defined to far in pngconf.h, and you should be all set. Everything in the library (except for zlib's structure) is expecting far data. You must use the typedefs with the p or pp on the end for pointers (or at least look at them and be careful). Make -note that the rows of data are defined as png_bytepp, which is an -unsigned char far * far *. +note that the rows of data are defined as png_bytepp, which is +an "unsigned char far * far *". Configuring for gui/windowing platforms: @@ -2697,7 +3625,10 @@ or delete an include, this is the place to do it. The includes that are not needed outside libpng are placed in pngpriv.h, which is only used by the routines inside libpng itself. The files in libpng proper only include pngpriv.h and png.h, which -in turn includes pngconf.h. +in turn includes pngconf.h and, as of libpng-1.5.0, pnglibconf.h. +As of libpng-1.5.0, pngpriv.h also includes three other private header +files, pngstruct.h, pnginfo.h, and pngdebug.h, which contain material +that previously appeared in the public headers. Configuring zlib: @@ -2713,6 +3644,7 @@ specify no compression (Z_NO_COMPRESSION = 0), but this would create files larger than just storing the raw bitmap. You can specify the compression level by calling: + #include zlib.h png_set_compression_level(png_ptr, level); Another useful one is to reduce the memory level used by the library. @@ -2723,19 +3655,43 @@ other things, lower levels will result in sections of incompressible data being emitted in smaller stored blocks, with a correspondingly larger relative overhead of up to 15% in the worst case. + #include zlib.h png_set_compression_mem_level(png_ptr, level); The other functions are for configuring zlib. They are not recommended for normal use and may result in writing an invalid PNG file. See zlib.h for more information on what these mean. + #include zlib.h png_set_compression_strategy(png_ptr, strategy); + png_set_compression_window_bits(png_ptr, window_bits); + png_set_compression_method(png_ptr, method); + png_set_compression_buffer_size(png_ptr, size); +As of libpng version 1.5.4, additional APIs became +available to set these separately for non-IDAT +compressed chunks such as zTXt, iTXt, and iCCP: + + #include zlib.h + #if PNG_LIBPNG_VER <= 10504 + png_set_text_compression_level(png_ptr, level); + + png_set_text_compression_mem_level(png_ptr, level); + + png_set_text_compression_strategy(png_ptr, + strategy); + + png_set_text_compression_window_bits(png_ptr, + window_bits); + + png_set_text_compression_method(png_ptr, method); + #endif + Controlling row filtering If you want to control whether libpng uses filtering or not, which @@ -2822,6 +3778,8 @@ before recompiling libpng and save yourself code and data space, or you can turn off individual capabilities with defines that begin with PNG_NO_. +In libpng-1.5.0 and later, the #define's are in pnglibconf.h instead. + You can also turn all of the transforms and ancillary chunk capabilities off en masse with compiler directives that define PNG_NO_READ[or WRITE]_TRANSFORMS, or PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS, @@ -2839,8 +3797,8 @@ capability, which you'll still have). All the reading and writing specific code are in separate files, so the linker should only grab the files it needs. However, if you want to make sure, or if you are building a stand alone library, all the -reading files start with pngr and all the writing files start with -pngw. The files that don't match either (like png.c, pngtrans.c, etc.) +reading files start with "pngr" and all the writing files start with "pngw". +The files that don't match either (like png.c, pngtrans.c, etc.) are used for both reading and writing, and always need to be included. The progressive reader is in pngpread.c @@ -2874,8 +3832,8 @@ according to printf-style formatting directives. For example, is expanded to - if(PNG_DEBUG > 2) - fprintf(PNG_DEBUG_FILE, "foo=%d\n", foo); + if (PNG_DEBUG > 2) + fprintf(PNG_DEBUG_FILE, "foo=%d\n", foo); When PNG_DEBUG is defined but is zero, the macros aren't defined, but you can still use PNG_DEBUG to control your own debugging: @@ -2896,11 +3854,13 @@ Libpng can support some of these extensions. To enable them, use the png_permit_mng_features() function: feature_set = png_permit_mng_features(png_ptr, mask) + mask is a png_uint_32 containing the bitwise OR of the features you want to enable. These include PNG_FLAG_MNG_EMPTY_PLTE PNG_FLAG_MNG_FILTER_64 PNG_ALL_MNG_FEATURES + feature_set is a png_uint_32 that is the bitwise AND of your mask with the set of MNG features that is supported by the version of libpng that you are using. @@ -2925,7 +3885,7 @@ still alive and well, but they have moved on to other things. The old libpng functions png_read_init(), png_write_init(), png_info_init(), png_read_destroy(), and png_write_destroy() have been moved to PNG_INTERNAL in version 0.95 to discourage their use. These -functions will be removed from libpng version 2.0.0. +functions will be removed from libpng version 1.4.0. The preferred method of creating and initializing the libpng structures is via the png_create_read_struct(), png_create_write_struct(), and @@ -2957,6 +3917,9 @@ The number libpng_vn is constructed from the major version, minor version with leading zero, and release number with leading zero, (e.g., libpng_vn for version 1.0.7 is 10007). +Note that this function does not take a png_ptr, so you can call it +before you've created one. + You can also check which version of png.h you used when compiling your application: @@ -3114,13 +4077,19 @@ png_get_mmx_bitdepth_threshold(), png_get_mmx_rowbytes_threshold(), png_set_asm_flags(), and png_mmx_supported() We removed the obsolete png_check_sig(), png_memcpy_check(), and -png_memset_check() functions. Instead use !png_sig_cmp(), png_memcpy(), -and png_memset(), respectively. +png_memset_check() functions. Instead use !png_sig_cmp(), memcpy(), +and memset(), respectively. The function png_set_gray_1_2_4_to_8() was removed. It has been deprecated since libpng-1.0.18 and 1.2.9, when it was replaced with png_set_expand_gray_1_2_4_to_8() because the former function also -expanded palette images. +expanded any tRNS chunk to an alpha channel. + +Macros for png_get_uint_16, png_get_uint_32, and png_get_int_32 +were added and are used by default instead of the corresponding +functions. Unfortunately, +from libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the +function) incorrectly returned a value of type png_uint_32. We changed the prototype for png_malloc() from png_malloc(png_structp png_ptr, png_uint_32 size) @@ -3130,7 +4099,7 @@ to This also applies to the prototype for the user replacement malloc_fn(). The png_calloc() function was added and is used in place of -of "png_malloc(); png_memset();" except in the case in png_read_png() +of "png_malloc(); memset();" except in the case in png_read_png() where the array consists of pointers; in this case a "for" loop is used after the png_malloc() to set the pointers to NULL, to give robust. behavior in case the application runs out of memory part-way through @@ -3149,17 +4118,308 @@ The png_zalloc() function no longer zeroes out the memory that it allocates. Support for dithering was disabled by default in libpng-1.4.0, because -been well tested and doesn't actually "dither". The code was not +it has not been well tested and doesn't actually "dither". +The code was not removed, however, and could be enabled by building libpng with PNG_READ_DITHER_SUPPORTED defined. In libpng-1.4.2, this support was reenabled, but the function was renamed png_set_quantize() to reflect more accurately what it actually does. At the same time, the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros were also renamed to -PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS. +PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS, and PNG_READ_DITHER_SUPPORTED +was renamed to PNG_READ_QUANTIZE_SUPPORTED. We removed the trailing '.' from the warning and error messages. -X. Detecting libpng +X. Changes to Libpng from version 1.4.x to 1.5.x + +From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the +function) incorrectly returned a value of type png_uint_32. + +A. Changes that affect users of libpng + +There are no substantial API changes between the non-deprecated parts of +the 1.4.5 API and the 1.5.0 API, however the ability to directly access +the main libpng control structures, png_struct and png_info, deprecated +in earlier versions of libpng, has been completely removed from +libpng 1.5. + +We no longer include zlib.h in png.h. Applications that need access +to information in zlib.h will need to add the '#include "zlib.h"' +directive. It does not matter whether it is placed prior to or after +the '"#include png.h"' directive. + +We moved the png_strcpy(), png_strncpy(), png_strlen(), png_memcpy(), +png_memcmp(), png_sprintf, and png_memcpy() macros into a private +header file (pngpriv.h) that is not accessible to applications. + +In png_get_iCCP, the type of "profile" was changed from png_charpp +to png_bytepp, and in png_set_iCCP, from png_charp to png_const_bytep. + +There are changes of form in png.h, including new and changed macros to +declare parts of the API. Some API functions with arguments that are +pointers to data not modified within the function have been corrected to +declare these arguments with PNG_CONST. + +Much of the internal use of C macros to control the library build has also +changed and some of this is visible in the exported header files, in +particular the use of macros to control data and API elements visible +during application compilation may require significant revision to +application code. (It is extremely rare for an application to do this.) + +Any program that compiled against libpng 1.4 and did not use deprecated +features or access internal library structures should compile and work +against libpng 1.5, except for the change in the prototype for +png_get_iCCP() and png_set_iCCP() API functions mentioned above. + +libpng 1.5.0 adds PNG_ PASS macros to help in the reading and writing of +interlaced images. The macros return the number of rows and columns in +each pass and information that can be used to de-interlace and (if +absolutely necessary) interlace an image. + +libpng 1.5.0 adds an API png_longjmp(png_ptr, value). This API calls +the application-provided png_longjmp_ptr on the internal, but application +initialized, longjmp buffer. It is provided as a convenience to avoid +the need to use the png_jmpbuf macro, which had the unnecessary side +effect of resetting the internal png_longjmp_ptr value. + +libpng 1.5.0 includes a complete fixed point API. By default this is +present along with the corresponding floating point API. In general the +fixed point API is faster and smaller than the floating point one because +the PNG file format used fixed point, not floating point. This applies +even if the library uses floating point in internal calculations. A new +macro, PNG_FLOATING_ARITHMETIC_SUPPORTED, reveals whether the library +uses floating point arithmetic (the default) or fixed point arithmetic +internally for performance critical calculations such as gamma correction. +In some cases, the gamma calculations may produce slightly different +results. This has changed the results in png_rgb_to_gray and in alpha +composition (png_set_background for example). This applies even if the +original image was already linear (gamma == 1.0) and, therefore, it is +not necessary to linearize the image. This is because libpng has *not* +been changed to optimize that case correctly, yet. + +Fixed point support for the sCAL chunk comes with an important caveat; +the sCAL specification uses a decimal encoding of floating point values +and the accuracy of PNG fixed point values is insufficient for +representation of these values. Consequently a "string" API +(png_get_sCAL_s and png_set_sCAL_s) is the only reliable way of reading +arbitrary sCAL chunks in the absence of either the floating point API or +internal floating point calculations. + +Applications no longer need to include the optional distribution header +file pngusr.h or define the corresponding macros during application +build in order to see the correct variant of the libpng API. From 1.5.0 +application code can check for the corresponding _SUPPORTED macro: + +#ifdef PNG_INCH_CONVERSIONS_SUPPORTED + /* code that uses the inch conversion APIs. */ +#endif + +This macro will only be defined if the inch conversion functions have been +compiled into libpng. The full set of macros, and whether or not support +has been compiled in, are available in the header file pnglibconf.h. +This header file is specific to the libpng build. Notice that prior to +1.5.0 the _SUPPORTED macros would always have the default definition unless +reset by pngusr.h or by explicit settings on the compiler command line. +These settings may produce compiler warnings or errors in 1.5.0 because +of macro redefinition. + +From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the +function) incorrectly returned a value of type png_uint_32. libpng 1.5.0 +is consistent with the implementation in 1.4.5 and 1.2.x (where the macro +did not exist.) + +Applications can now choose whether to use these macros or to call the +corresponding function by defining PNG_USE_READ_MACROS or +PNG_NO_USE_READ_MACROS before including png.h. Notice that this is +only supported from 1.5.0 -defining PNG_NO_USE_READ_MACROS prior to 1.5.0 +will lead to a link failure. + +Prior to libpng-1.5.4, the zlib compressor used the same set of parameters +when compressing the IDAT data and textual data such as zTXt and iCCP. +In libpng-1.5.4 we reinitialized the zlib stream for each type of data. +We added five png_set_text_*() functions for setting the parameters to +use with textual data. + +Prior to libpng-1.5.4, the PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED +option was off by default, and slightly inaccurate scaling occurred. +This option can no longer be turned off, and the choice of accurate +or inaccurate 16-to-8 scaling is by using the new png_set_scale_16_to_8() +API for accurate scaling or the old png_set_strip_16_to_8() API for simple +chopping. + +Prior to libpng-1.5.4, the png_set_user_limits() function could only be +used to reduce the width and height limits from the value of +PNG_USER_WIDTH_MAX and PNG_USER_HEIGHT_MAX, although this document said +that it could be used to override them. Now this function will reduce or +increase the limits. + +B. Changes to the build and configuration of libpng + +Details of internal changes to the library code can be found in the CHANGES +file and in the GIT repository logs. These will be of no concern to the vast +majority of library users or builders, however the few who configure libpng +to a non-default feature set may need to change how this is done. + +There should be no need for library builders to alter build scripts if +these use the distributed build support - configure or the makefiles - +however users of the makefiles may care to update their build scripts +to build pnglibconf.h where the corresponding makefile does not do so. + +Building libpng with a non-default configuration has changed completely. +The old method using pngusr.h should still work correctly even though the +way pngusr.h is used in the build has been changed; however, library +builders will probably want to examine the changes to take advantage of +new capabilities and to simplify their build system. + +B.1 Specific changes to library configuration capabilities + +The library now supports a complete fixed point implementation and can +thus be used on systems that have no floating point support or very +limited or slow support. Previously gamma correction, an essential part +of complete PNG support, required reasonably fast floating point. + +As part of this the choice of internal implementation has been made +independent of the choice of fixed versus floating point APIs and all the +missing fixed point APIs have been implemented. + +The exact mechanism used to control attributes of API functions has +changed. A single set of operating system independent macro definitions +is used and operating system specific directives are defined in +pnglibconf.h + +As part of this the mechanism used to choose procedure call standards on +those systems that allow a choice has been changed. At present this only +affects certain Microsoft (DOS, Windows) and IBM (OS/2) operating systems +running on Intel processors. As before, PNGAPI is defined where required +to control the exported API functions; however, two new macros, PNGCBAPI +and PNGCAPI, are used instead for callback functions (PNGCBAPI) and +(PNGCAPI) for functions that must match a C library prototype (currently +only png_longjmp_ptr, which must match the C longjmp function.) The new +approach is documented in pngconf.h + +Despite these changes, libpng 1.5.0 only supports the native C function +calling standard on those platforms tested so far (__cdecl on Microsoft +Windows). This is because the support requirements for alternative +calling conventions seem to no longer exist. Developers who find it +necessary to set PNG_API_RULE to 1 should advise the mailing list +(png-mng-implement) of this and library builders who use Openwatcom and +therefore set PNG_API_RULE to 2 should also contact the mailing list. + +A new test program, pngvalid, is provided in addition to pngtest. +pngvalid validates the arithmetic accuracy of the gamma correction +calculations and includes a number of validations of the file format. +A subset of the full range of tests is run when "make check" is done +(in the 'configure' build.) pngvalid also allows total allocated memory +usage to be evaluated and performs additional memory overwrite validation. + +Many changes to individual feature macros have been made. The following +are the changes most likely to be noticed by library builders who +configure libpng: + +1) All feature macros now have consistent naming: + +#define PNG_NO_feature turns the feature off +#define PNG_feature_SUPPORTED turns the feature on + +pnglibconf.h contains one line for each feature macro which is either: + +#define PNG_feature_SUPPORTED + +if the feature is supported or: + +/*#undef PNG_feature_SUPPORTED*/ + +if it is not. Library code consistently checks for the 'SUPPORTED' macro. +It does not, and libpng applications should not, check for the 'NO' macro +which will not normally be defined even if the feature is not supported. +The 'NO' macros are only used internally for setting or not setting the +corresponding 'SUPPORTED' macros. + +Compatibility with the old names is provided as follows: + +PNG_INCH_CONVERSIONS turns on PNG_INCH_CONVERSIONS_SUPPORTED + +And the following definitions disable the corresponding feature: + +PNG_SETJMP_NOT_SUPPORTED disables SETJMP +PNG_READ_TRANSFORMS_NOT_SUPPORTED disables READ_TRANSFORMS +PNG_NO_READ_COMPOSITED_NODIV disables READ_COMPOSITE_NODIV +PNG_WRITE_TRANSFORMS_NOT_SUPPORTED disables WRITE_TRANSFORMS +PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED disables READ_ANCILLARY_CHUNKS +PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED disables WRITE_ANCILLARY_CHUNKS + +Library builders should remove use of the above, inconsistent, names. + +2) Warning and error message formatting was previously conditional on +the STDIO feature. The library has been changed to use the +CONSOLE_IO feature instead. This means that if CONSOLE_IO is disabled +the library no longer uses the printf(3) functions, even though the +default read/write implementations use (FILE) style stdio.h functions. + +3) Three feature macros now control the fixed/floating point decisions: + +PNG_FLOATING_POINT_SUPPORTED enables the floating point APIs + +PNG_FIXED_POINT_SUPPORTED enables the fixed point APIs; however, in +practice these are normally required internally anyway (because the PNG +file format is fixed point), therefore in most cases PNG_NO_FIXED_POINT +merely stops the function from being exported. + +PNG_FLOATING_ARITHMETIC_SUPPORTED chooses between the internal floating +point implementation or the fixed point one. Typically the fixed point +implementation is larger and slower than the floating point implementation +on a system that supports floating point, however it may be faster on a +system which lacks floating point hardware and therefore uses a software +emulation. + +4) Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the +functions to read and write ints to be disabled independently of +PNG_USE_READ_MACROS, which allows libpng to be built with the functions +even though the default is to use the macros - this allows applications +to choose at app buildtime whether or not to use macros (previously +impossible because the functions weren't in the default build.) + +B.2 Changes to the configuration mechanism + +Prior to libpng-1.5.0 library builders who needed to configure libpng +had either to modify the exported pngconf.h header file to add system +specific configuration or had to write feature selection macros into +pngusr.h and cause this to be included into pngconf.h by defining +PNG_USER_CONFIG. The latter mechanism had the disadvantage that an +application built without PNG_USER_CONFIG defined would see the +unmodified, default, libpng API and thus would probably fail to link. + +These mechanisms still work in the configure build and in any makefile +build that builds pnglibconf.h, although the feature selection macros +have changed somewhat as described above. In 1.5.0, however, pngusr.h is +processed only once, when the exported header file pnglibconf.h is built. +pngconf.h no longer includes pngusr.h, therefore pngusr.h is ignored after the +build of pnglibconf.h and it is never included in an application build. + +The rarely used alternative of adding a list of feature macros to the +CFLAGS setting in the build also still works, however the macros will be +copied to pnglibconf.h and this may produce macro redefinition warnings +when the individual C files are compiled. + +All configuration now only works if pnglibconf.h is built from +scripts/pnglibconf.dfa. This requires the program awk. Brian Kernighan +(the original author of awk) maintains C source code of that awk and this +and all known later implementations (often called by subtly different +names - nawk and gawk for example) are adequate to build pnglibconf.h. +The Sun Microsystems (now Oracle) program 'awk' is an earlier version +and does not work; this may also apply to other systems that have a +functioning awk called 'nawk'. + +Configuration options are now documented in scripts/pnglibconf.dfa. This +file also includes dependency information that ensures a configuration is +consistent; that is, if a feature is switched off dependent features are +also removed. As a recommended alternative to using feature macros in +pngusr.h a system builder may also define equivalent options in pngusr.dfa +(or, indeed, any file) and add that to the configuration by setting +DFA_XTRA to the file name. The makefiles in contrib/pngminim illustrate +how to do this, and a case where pngusr.h is still required. + +XI. Detecting libpng The png_get_io_ptr() function has been present since libpng-0.88, has never changed, and is unaffected by conditional compilation macros. It is the @@ -3168,7 +4428,7 @@ libpng version since 0.88. In an autoconf "configure.in" you could use AC_CHECK_LIB(png, png_get_io_ptr, ... -XI. Source code repository +XII. Source code repository Since about February 2009, version 1.2.34, libpng has been under "git" source control. The git repository was built from old libpng-x.y.z.tar.gz files @@ -3187,7 +4447,12 @@ the libpng bug tracker at http://libpng.sourceforge.net -XII. Coding style +We also accept patches built from the tar or zip distributions, and +simple verbal discriptions of bug fixes, reported either to the +SourceForge bug tracker, to the png-mng-implement at lists.sf.net +mailing list, or directly to glennrp. + +XIII. Coding style Our coding style is similar to the "Allman" style, with curly braces on separate lines: @@ -3244,7 +4509,7 @@ Functions and their curly braces are not indented, and exported functions are marked with PNGAPI: /* This is a public function that is visible to - * application programers. It does thus-and-so. + * application programmers. It does thus-and-so. */ void PNGAPI png_exported_function(png_ptr, png_info, foo) @@ -3272,12 +4537,13 @@ above the comment that says /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ -The names of all exported functions and variables begin -with "png_", and all publicly visible C preprocessor -macros begin with "PNG_". +To avoid polluting the global namespace, the names of all exported +functions and variables begin with "png_", and all publicly visible C +preprocessor macros begin with "PNG_". We request that applications that +use libpng *not* begin any of their own symbols with either of these strings. We put a space after each comma and after each semicolon -in "for" statments, and we put spaces before and after each +in "for" statements, and we put spaces before and after each C binary operator and after "for" or "while", and before "?". We don't put a space between a typecast and the expression being cast, nor do we put one between a function name and the @@ -3289,21 +4555,24 @@ left parenthesis that follows it: We prefer #ifdef and #ifndef to #if defined() and if !defined() when there is only one macro being tested. +We prefer to express integers that are used as bit masks in hex format, +with an even number of lower-case hex digits (e.g., 0x00, 0xff, 0x0100). + We do not use the TAB character for indentation in the C sources. Lines do not exceed 80 characters. Other rules can be inferred by inspecting the libpng source. -XIII. Y2K Compliance in libpng +XIV. Y2K Compliance in libpng -September 23, 2010 +November 3, 2011 Since the PNG Development group is an ad-hoc body, we can't make an official declaration. This is your unofficial assurance that libpng from version 0.71 and -upward through 1.4.4 are Y2K compliant. It is my belief that earlier +upward through 1.5.6 are Y2K compliant. It is my belief that earlier versions were also Y2K compliant. Libpng only has three year fields. One is a 2-byte unsigned integer that diff --git a/src/png/libpng.3 b/src/png/libpng.3 index a34aea5331..94def9e2bf 100644 --- a/src/png/libpng.3 +++ b/src/png/libpng.3 @@ -1,6 +1,6 @@ -.TH LIBPNG 3 "September 23, 2010" +.TH LIBPNG 3 "November 3, 2011" .SH NAME -libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 +libpng \- Portable Network Graphics (PNG) Reference Library 1.5.6 .SH SYNOPSIS \fI\fB @@ -16,6 +16,14 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_build_grayscale_palette (int \fP\fIbit_depth\fP\fB, png_colorp \fIpalette\fP\fB);\fP + +\fI\fB + +\fBpng_voidp png_calloc (png_structp \fP\fIpng_ptr\fP\fB, png_alloc_size_t \fIsize\fP\fB);\fP + +\fI\fB + \fBvoid png_chunk_benign_error (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fIerror\fP\fB);\fP \fI\fB @@ -48,7 +56,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_structp png_create_read_struct_2(png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP +\fBpng_structp png_create_read_struct_2 (png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP \fI\fB @@ -56,7 +64,11 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_structp png_create_write_struct_2(png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP +\fBpng_structp png_create_write_struct_2 (png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP + +\fI\fB + +\fBvoid png_data_freer (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIfreer\fP\fB, png_uint_32 \fImask)\fP\fB);\fP \fI\fB @@ -72,6 +84,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_err (png_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + \fBvoid png_error (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fIerror\fP\fB);\fP \fI\fB @@ -84,7 +100,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_free_default(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fIptr\fP\fB);\fP +\fBvoid png_free_default (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fIptr\fP\fB);\fP \fI\fB @@ -92,75 +108,101 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_byte png_get_bit_depth (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_byte png_get_bit_depth (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_bKGD (png_const_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fI*background\fP\fB);\fP + +\fI\fB + +\fBpng_byte png_get_channels (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fI*background\fP\fB);\fP +\fBpng_uint_32 png_get_cHRM (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, double \fP\fI*white_x\fP\fB, double \fP\fI*white_y\fP\fB, double \fP\fI*red_x\fP\fB, double \fP\fI*red_y\fP\fB, double \fP\fI*green_x\fP\fB, double \fP\fI*green_y\fP\fB, double \fP\fI*blue_x\fP\fB, double \fI*blue_y\fP\fB);\fP \fI\fB -\fBpng_byte png_get_channels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_cHRM_fixed (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*white_x\fP\fB, png_uint_32 \fP\fI*white_y\fP\fB, png_uint_32 \fP\fI*red_x\fP\fB, png_uint_32 \fP\fI*red_y\fP\fB, png_uint_32 \fP\fI*green_x\fP\fB, png_uint_32 \fP\fI*green_y\fP\fB, png_uint_32 \fP\fI*blue_x\fP\fB, png_uint_32 \fI*blue_y\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fI*white_x\fP\fB, double \fP\fI*white_y\fP\fB, double \fP\fI*red_x\fP\fB, double \fP\fI*red_y\fP\fB, double \fP\fI*green_x\fP\fB, double \fP\fI*green_y\fP\fB, double \fP\fI*blue_x\fP\fB, double \fI*blue_y\fP\fB);\fP +\fBpng_uint_32 png_get_cHRM_XYZ (png_structp \fIpng_ptr, + +\fBpng_const_infop \fP\fIinfo_ptr\fP\fB, double \fP\fI*red_X\fP\fB, double \fP\fI*red_Y\fP\fB, double \fI*red_Z, + +\fBdouble \fP\fI*green_X\fP\fB, double \fP\fI*green_Y\fP\fB, double \fP\fI*green_Z\fP\fB, double \fI*blue_X, + +\fBdouble \fP\fI*blue_Y\fP\fB, double \fI*blue_Z\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*white_x\fP\fB, png_uint_32 \fP\fI*white_y\fP\fB, png_uint_32 \fP\fI*red_x\fP\fB, png_uint_32 \fP\fI*red_y\fP\fB, png_uint_32 \fP\fI*green_x\fP\fB, png_uint_32 \fP\fI*green_y\fP\fB, png_uint_32 \fP\fI*blue_x\fP\fB, png_uint_32 \fI*blue_y\fP\fB);\fP +\fBpng_uint_32 png_get_cHRM_XYZ_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_fixed_point \fP\fI*int_red_X\fP\fB, png_fixed_point \fP\fI*int_red_Y\fP\fB, png_fixed_point \fP\fI*int_red_Z\fP\fB, png_fixed_point \fP\fI*int_green_X\fP\fB, png_fixed_point \fP\fI*int_green_Y\fP\fB, png_fixed_point \fP\fI*int_green_Z\fP\fB, png_fixed_point \fP\fI*int_blue_X\fP\fB, png_fixed_point \fP\fI*int_blue_Y\fP\fB, png_fixed_point \fI*int_blue_Z\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_chunk_cache_max (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_chunk_cache_max (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_byte png_get_color_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_alloc_size_t png_get_chunk_malloc_max (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_compression_buffer_size (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_byte png_get_color_type (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_byte png_get_compression_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_compression_buffer_size (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_byte png_get_copyright (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_byte png_get_compression_type (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_voidp png_get_error_ptr (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_byte png_get_copyright (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_byte png_get_filter_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_current_row_number \fI(png_const_structp\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fI*file_gamma\fP\fB);\fP +\fBpng_byte png_get_current_pass_number \fI(png_const_structp\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fI*int_file_gamma\fP\fB);\fP +\fBpng_voidp png_get_error_ptr (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_byte png_get_header_ver (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_byte png_get_filter_type (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_byte png_get_header_version (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_gAMA (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, double \fI*file_gamma\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fI*hist\fP\fB);\fP +\fBpng_uint_32 png_get_gAMA_fixed (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fI*int_file_gamma\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charpp \fP\fIname\fP\fB, int \fP\fI*compression_type\fP\fB, png_charpp \fP\fIprofile\fP\fB, png_uint_32 \fI*proflen\fP\fB);\fP +\fBpng_byte png_get_header_ver (png_const_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_byte png_get_header_version (png_const_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_hIST (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fI*hist\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_iCCP (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_charpp \fP\fIname\fP\fB, int \fP\fI*compression_type\fP\fB, png_bytepp \fP\fIprofile\fP\fB, png_uint_32 \fI*proflen\fP\fB);\fP \fI\fB @@ -168,11 +210,11 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_uint_32 png_get_image_height (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_image_height (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_image_width (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_image_width (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB @@ -180,7 +222,15 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_byte png_get_interlace_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_byte png_get_interlace_type (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_const_bytep png_get_io_chunk_name (png_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_io_chunk_type (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB @@ -188,81 +238,105 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_byte png_get_libpng_ver (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_io_state (png_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_alloc_size_t png_get_chunk_malloc_max (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_byte png_get_libpng_ver (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_voidp png_get_mem_ptr(png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_voidp png_get_mem_ptr (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*offset_x\fP\fB, png_uint_32 \fP\fI*offset_y\fP\fB, int \fI*unit_type\fP\fB);\fP +\fBpng_uint_32 png_get_oFFs (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*offset_x\fP\fB, png_uint_32 \fP\fI*offset_y\fP\fB, int \fI*unit_type\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fI*purpose\fP\fB, png_int_32 \fP\fI*X0\fP\fB, png_int_32 \fP\fI*X1\fP\fB, int \fP\fI*type\fP\fB, int \fP\fI*nparams\fP\fB, png_charp \fP\fI*units\fP\fB, png_charpp \fI*params\fP\fB);\fP +\fBpng_uint_32 png_get_pCAL (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fI*purpose\fP\fB, png_int_32 \fP\fI*X0\fP\fB, png_int_32 \fP\fI*X1\fP\fB, int \fP\fI*type\fP\fB, int \fP\fI*nparams\fP\fB, png_charp \fP\fI*units\fP\fB, png_charpp \fI*params\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*res_x\fP\fB, png_uint_32 \fP\fI*res_y\fP\fB, int \fI*unit_type\fP\fB);\fP +\fBpng_uint_32 png_get_pHYs (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*res_x\fP\fB, png_uint_32 \fP\fI*res_y\fP\fB, int \fI*unit_type\fP\fB);\fP \fI\fB -\fBfloat png_get_pixel_aspect_ratio (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBfloat png_get_pixel_aspect_ratio (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_pHYs_dpi (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*res_x\fP\fB, png_uint_32 \fP\fI*res_y\fP\fB, int \fI*unit_type\fP\fB);\fP \fI\fB -\fBpng_voidp png_get_progressive_ptr (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_fixed_point png_get_pixel_aspect_ratio_fixed (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_colorp \fP\fI*palette\fP\fB, int \fI*num_palette\fP\fB);\fP +\fBpng_uint_32 png_get_pixels_per_inch (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_byte png_get_rgb_to_gray_status (png_structp \fIpng_ptr) +\fBpng_uint_32 png_get_pixels_per_meter (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP -\fBpng_uint_32 png_get_rowbytes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fI\fB + +\fBpng_voidp png_get_progressive_ptr (png_const_structp \fIpng_ptr\fP\fB);\fP \fI\fB -\fBpng_bytepp png_get_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_PLTE (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_colorp \fP\fI*palette\fP\fB, int \fI*num_palette\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fI*sig_bit\fP\fB);\fP +\fBpng_byte png_get_rgb_to_gray_status (png_const_structp \fIpng_ptr) + +\fBpng_uint_32 png_get_rowbytes (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_bytep png_get_signature (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_bytepp png_get_rows (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fI*splt_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_sBIT (png_const_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fI*sig_bit\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fI*intent\fP\fB);\fP +\fBvoid png_get_sCAL (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, int* \fP\fIunit\fP\fB, double* \fP\fIwidth\fP\fB, double* \fIheight\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_text (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fI*text_ptr\fP\fB, int \fI*num_text\fP\fB);\fP +\fBvoid png_get_sCAL_fixed (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, int* \fP\fIunit\fP\fB, png_fixed_pointp \fP\fIwidth\fP\fB, png_fixed_pointp \fIheight\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fI*mod_time\fP\fB);\fP +\fBvoid png_get_sCAL_s (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, int* \fP\fIunit\fP\fB, png_charpp \fP\fIwidth\fP\fB, png_charpp \fIheight\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fI*trans\fP\fB, int \fP\fI*num_trans\fP\fB, png_color_16p \fI*trans_color\fP\fB);\fP +\fBpng_bytep png_get_signature (png_const_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_sPLT (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fI*splt_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_sRGB (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, int \fI*file_srgb_intent\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_text (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fI*text_ptr\fP\fB, int \fI*num_text\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_tIME (png_const_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fI*mod_time\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_tRNS (png_const_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fI*trans_alpha\fP\fB, int \fP\fI*num_trans\fP\fB, png_color_16p \fI*trans_color\fP\fB);\fP \fI\fB @@ -272,7 +346,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_uint_32 png_get_uint_31 (png_bytep \fIbuf\fP\fB);\fP +\fBpng_uint_32 png_get_uint_31 (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIbuf\fP\fB);\fP \fI\fB @@ -282,51 +356,75 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_uint_32 png_get_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkpp \fIunknowns\fP\fB);\fP +\fBpng_uint_32 png_get_unknown_chunks (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkpp \fIunknowns\fP\fB);\fP + +\fI\fB + +\fBpng_voidp png_get_user_chunk_ptr (png_const_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_user_height_max (png_const_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_voidp png_get_user_transform_ptr (png_const_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_user_width_max (png_const_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_get_valid (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIflag\fP\fB);\fP + +\fI\fB + +\fBfloat png_get_x_offset_inches (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_voidp png_get_user_chunk_ptr (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_fixed_point png_get_x_offset_inches_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_user_height_max( png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_int_32 png_get_x_offset_microns (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_voidp png_get_user_transform_ptr (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_int_32 png_get_x_offset_pixels (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_user_width_max (png_structp \fIpng_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_x_pixels_per_inch (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_valid (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIflag\fP\fB);\fP +\fBpng_uint_32 png_get_x_pixels_per_meter (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_int_32 png_get_x_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBfloat png_get_y_offset_inches (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_int_32 png_get_x_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_fixed_point png_get_y_offset_inches_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_x_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_int_32 png_get_y_offset_microns (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_int_32 png_get_y_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_int_32 png_get_y_offset_pixels (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_int_32 png_get_y_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_y_pixels_per_inch (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_get_y_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP +\fBpng_uint_32 png_get_y_pixels_per_meter (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP \fI\fB @@ -334,23 +432,31 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_info_init_3 (png_infopp \fP\fIinfo_ptr\fP\fB, png_size_t \fIpng_info_struct_size\fP\fB);\fP + +\fI\fB + \fBvoid png_init_io (png_structp \fP\fIpng_ptr\fP\fB, FILE \fI*fp\fP\fB);\fP \fI\fB +\fBvoid png_longjmp (png_structp \fP\fIpng_ptr\fP\fB, int \fIval\fP\fB);\fP + +\fI\fB + \fBpng_voidp png_malloc (png_structp \fP\fIpng_ptr\fP\fB, png_alloc_size_t \fIsize\fP\fB);\fP \fI\fB -\fBpng_voidp png_malloc_default(png_structp \fP\fIpng_ptr\fP\fB, png_alloc_size_t \fIsize\fP\fB);\fP +\fBpng_voidp png_malloc_default (png_structp \fP\fIpng_ptr\fP\fB, png_alloc_size_t \fIsize\fP\fB);\fP \fI\fB -\fBvoidp png_memcpy (png_voidp \fP\fIs1\fP\fB, png_voidp \fP\fIs2\fP\fB, png_size_t \fIsize\fP\fB);\fP +\fBpng_voidp png_malloc_warn (png_structp \fP\fIpng_ptr\fP\fB, png_alloc_size_t \fIsize\fP\fB);\fP \fI\fB -\fBvoidp png_memset (png_voidp \fP\fIs1\fP\fB, int \fP\fIvalue\fP\fB, png_size_t \fIsize\fP\fB);\fP +\fBpng_uint_32 png_permit_mng_features (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fImng_features_permitted\fP\fB);\fP \fI\fB @@ -358,6 +464,14 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBpng_size_t png_process_data_pause \fP\fI(png_structp\fP\fB, int \fIsave\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_process_data_skip \fI(png_structp\fP\fB);\fP + +\fI\fB + \fBvoid png_progressive_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIold_row\fP\fB, png_bytep \fInew_row\fP\fB);\fP \fI\fB @@ -390,7 +504,11 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBpng_save_int_32 (png_bytep \fP\fIbuf\fP\fB, png_int_32 \fIi\fP\fB);\fP +\fBint png_reset_zstream (png_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBvoid png_save_int_32 (png_bytep \fP\fIbuf\fP\fB, png_int_32 \fIi\fP\fB);\fP \fI\fB @@ -406,10 +524,26 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_set_alpha_mode (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fImode\fP\fB, double \fIoutput_gamma\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_alpha_mode_fixed (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fImode\fP\fB, png_fixed_point \fIoutput_gamma\fP\fB);\fP + +\fI\fB + \fBvoid png_set_background (png_structp \fP\fIpng_ptr\fP\fB, png_color_16p \fP\fIbackground_color\fP\fB, int \fP\fIbackground_gamma_code\fP\fB, int \fP\fIneed_expand\fP\fB, double \fIbackground_gamma\fP\fB);\fP \fI\fB +\fBvoid png_set_background_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_color_16p \fP\fIbackground_color\fP\fB, int \fP\fIbackground_gamma_code\fP\fB, int \fP\fIneed_expand\fP\fB, png_uint_32 \fIbackground_gamma\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_benign_errors (png_structp \fP\fIpng_ptr\fP\fB, int \fIallowed\fP\fB);\fP + +\fI\fB + \fBvoid png_set_bgr (png_structp \fIpng_ptr\fP\fB);\fP \fI\fB @@ -426,6 +560,16 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_set_cHRM_XYZ (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fIred_X\fP\fB, double \fP\fIred_Y\fP\fB, double \fP\fIred_Z\fP\fB, double \fP\fIgreen_X\fP\fB, double \fIgreen_Y, + +\fBdouble \fP\fIgreen_Z\fP\fB, double \fP\fIblue_X\fP\fB, double \fP\fIblue_Y\fP\fB, double \fIblue_Z\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_cHRM_XYZ_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_fixed_point \fP\fIint_red_X\fP\fB, png_fixed_point \fP\fIint_red_Y\fP\fB, png_fixed_point \fP\fIint_red_Z\fP\fB, png_fixed_point \fP\fIint_green_X\fP\fB, png_fixed_point \fP\fIint_green_Y\fP\fB, png_fixed_point \fP\fIint_green_Z\fP\fB, png_fixed_point \fP\fIint_blue_X\fP\fB, png_fixed_point \fP\fIint_blue_Y\fP\fB, png_fixed_point \fIint_blue_Z\fP\fB);\fP + +\fI\fB + \fBvoid png_set_chunk_cache_max (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIuser_chunk_cache_max\fP\fB);\fP \fI\fB @@ -462,7 +606,11 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_expand_gray_1_2_4_to_8(png_structp \fIpng_ptr\fP\fB);\fP +\fBvoid png_set_expand_16 (png_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_expand_gray_1_2_4_to_8 (png_structp \fIpng_ptr\fP\fB);\fP \fI\fB @@ -478,6 +626,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_set_filter_heuristics_fixed (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIheuristic_method\fP\fB, int \fP\fInum_weights\fP\fB, png_fixed_point_p \fP\fIfilter_weights\fP\fB, png_fixed_point_p \fIfilter_costs\fP\fB);\fP + +\fI\fB + \fBvoid png_set_flush (png_structp \fP\fIpng_ptr\fP\fB, int \fInrows\fP\fB);\fP \fI\fB @@ -486,6 +638,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_set_gamma_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIscreen_gamma\fP\fB, png_uint_32 \fIdefault_file_gamma\fP\fB);\fP + +\fI\fB + \fBvoid png_set_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fIfile_gamma\fP\fB);\fP \fI\fB @@ -494,7 +650,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_gray_1_2_4_to_8(png_structp \fIpng_ptr\fP\fB);\fP +\fBvoid png_set_gray_1_2_4_to_8 (png_structp \fIpng_ptr\fP\fB);\fP \fI\fB @@ -506,7 +662,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_charp \fP\fIprofile\fP\fB, png_uint_32 \fIproflen\fP\fB);\fP +\fBvoid png_set_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_const_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_const_bytep \fP\fIprofile\fP\fB, png_uint_32 \fIproflen\fP\fB);\fP \fI\fB @@ -542,7 +698,11 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_mem_fn(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP +\fBvoid png_set_compression_buffer_size (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_mem_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP \fI\fB @@ -558,7 +718,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_palette_to_rgb(png_structp \fIpng_ptr\fP\fB);\fP +\fBvoid png_set_palette_to_rgb (png_structp \fIpng_ptr\fP\fB);\fP \fI\fB @@ -590,6 +750,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_set_read_user_chunk_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIuser_chunk_ptr\fP\fB, png_user_chunk_ptr \fIread_user_chunk_fn\fP\fB);\fP + +\fI\fB + \fBvoid png_set_read_user_transform_fn (png_structp \fP\fIpng_ptr\fP\fB, png_user_transform_ptr \fIread_user_transform_fn\fP\fB);\fP \fI\fB @@ -598,7 +762,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_rgb_to_gray_fixed (png_structp \fP\fIpng_ptr\fP\fB, int error_action png_fixed_point \fP\fIred\fP\fB, png_fixed_point \fIgreen\fP\fB);\fP +\fBvoid png_set_rgb_to_gray_fixed (png_structp \fP\fIpng_ptr\fP\fB, int error_action png_uint_32 \fP\fIred\fP\fB, png_uint_32 \fIgreen\fP\fB);\fP \fI\fB @@ -610,7 +774,19 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP +\fBvoid png_set_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_sCAL_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIunit\fP\fB, png_fixed_point \fP\fIwidth\fP\fB, png_fixed_point \fIheight\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_sCAL_s (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIunit\fP\fB, png_charp \fP\fIwidth\fP\fB, png_charp \fIheight\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_scale_16 (png_structp \fIpng_ptr\fP\fB);\fP \fI\fB @@ -626,11 +802,11 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIintent\fP\fB);\fP +\fBvoid png_set_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIsrgb_intent\fP\fB);\fP \fI\fB -\fBvoid png_set_sRGB_gAMA_and_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIintent\fP\fB);\fP +\fBvoid png_set_sRGB_gAMA_and_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIsrgb_intent\fP\fB);\fP \fI\fB @@ -642,6 +818,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB +\fBvoid png_set_strip_error_numbers (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIstrip_mode\fP\fB);\fP + +\fI\fB + \fBvoid png_set_swap (png_structp \fIpng_ptr\fP\fB);\fP \fI\fB @@ -654,27 +834,43 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP +\fBvoid png_set_text_compression_level (png_structp \fP\fIpng_ptr\fP\fB, int \fIlevel\fP\fB);\fP \fI\fB -\fBvoid png_set_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fItrans\fP\fB, int \fP\fInum_trans\fP\fB, png_color_16p \fItrans_color\fP\fB);\fP +\fBvoid png_set_text_compression_mem_level (png_structp \fP\fIpng_ptr\fP\fB, int \fImem_level\fP\fB);\fP \fI\fB -\fBvoid png_set_tRNS_to_alpha(png_structp \fIpng_ptr\fP\fB);\fP +\fBvoid png_set_text_compression_strategy (png_structp \fP\fIpng_ptr\fP\fB, int \fIstrategy\fP\fB);\fP \fI\fB -\fBpng_uint_32 png_set_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkp \fP\fIunknowns\fP\fB, int \fP\fInum\fP\fB, int \fIlocation\fP\fB);\fP +\fBvoid png_set_text_compression_window_bits (png_structp \fP\fIpng_ptr\fP\fB, int \fIwindow_bits\fP\fB);\fP \fI\fB -\fBvoid png_set_unknown_chunk_location(png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIchunk\fP\fB, int \fIlocation\fP\fB);\fP +\fBvoid \fP\fIpng_set_text_compression_method\fP\fB, (png_structp \fP\fIpng_ptr\fP\fB, int \fImethod)\fP\fB);\fP \fI\fB -\fBvoid png_set_read_user_chunk_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIuser_chunk_ptr\fP\fB, png_user_chunk_ptr \fIread_user_chunk_fn\fP\fB);\fP +\fBvoid png_set_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fItrans_alpha\fP\fB, int \fP\fInum_trans\fP\fB, png_color_16p \fItrans_color\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_tRNS_to_alpha (png_structp \fIpng_ptr\fP\fB);\fP + +\fI\fB + +\fBpng_uint_32 png_set_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkp \fP\fIunknowns\fP\fB, int \fP\fInum\fP\fB, int \fIlocation\fP\fB);\fP + +\fI\fB + +\fBvoid png_set_unknown_chunk_location (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIchunk\fP\fB, int \fIlocation\fP\fB);\fP \fI\fB @@ -698,10 +894,6 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 \fI\fB -\fBvoid png_set_compression_buffer_size(png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP - -\fI\fB - \fBint png_sig_cmp (png_bytep \fP\fIsig\fP\fB, png_size_t \fP\fIstart\fP\fB, png_size_t \fInum_to_check\fP\fB);\fP \fI\fB @@ -781,14 +973,14 @@ library supports encoding, decoding, and various manipulations of the Portable Network Graphics (PNG) format image files. It uses the .IR zlib(3) compression library. -Following is a copy of the libpng.txt file that accompanies libpng. +Following is a copy of the libpng-manual.txt file that accompanies libpng. .SH LIBPNG.TXT -libpng.txt - A description on how to use and modify libpng +libpng-manual.txt - A description on how to use and modify libpng - libpng version 1.4.4 - September 23, 2010 + libpng version 1.5.6 - November 3, 2011 Updated and distributed by Glenn Randers-Pehrson - Copyright (c) 1998-2010 Glenn Randers-Pehrson + Copyright (c) 1998-2011 Glenn Randers-Pehrson This document is released under the libpng license. For conditions of distribution and use, see the disclaimer @@ -796,9 +988,9 @@ libpng.txt - A description on how to use and modify libpng Based on: - libpng versions 0.97, January 1998, through 1.4.4 - September 23, 2010 + libpng versions 0.97, January 1998, through 1.5.6 - November 3, 2011 Updated and distributed by Glenn Randers-Pehrson - Copyright (c) 1998-2010 Glenn Randers-Pehrson + Copyright (c) 1998-2011 Glenn Randers-Pehrson libpng 1.0 beta 6 version 0.96 May 28, 1997 Updated and distributed by Andreas Dilger @@ -884,34 +1076,203 @@ same instance of a structure. .SH II. Structures There are two main structures that are important to libpng, png_struct -and png_info. The first, png_struct, is an internal structure that -will not, for the most part, be used by a user except as the first -variable passed to every libpng function call. +and png_info. Both are internal structures that are no longer exposed +in the libpng interface (as of libpng 1.5.0). The png_info structure is designed to provide information about the PNG file. At one time, the fields of png_info were intended to be directly accessible to the user. However, this tended to cause problems with applications using dynamically loaded libraries, and as a result a set of interface functions for png_info (the png_get_*() and png_set_*() -functions) was developed. The fields of png_info are still available for -older applications, but it is suggested that applications use the new -interfaces if at all possible. - -Applications that do make direct access to the members of png_struct (except -for png_ptr->jmpbuf) must be recompiled whenever the library is updated, -and applications that make direct access to the members of png_info must -be recompiled if they were compiled or loaded with libpng version 1.0.6, -in which the members were in a different order. In version 1.0.7, the -members of the png_info structure reverted to the old order, as they were -in versions 0.97c through 1.0.5. Starting with version 2.0.0, both -structures are going to be hidden, and the contents of the structures will -only be accessible through the png_get/png_set functions. +functions) was developed, and direct access to the png_info fields was +deprecated.. + +The png_struct structure is the object used by the library to decode a +single image. As of 1.5.0 this structure is also not exposed. + +Almost all libpng APIs require a pointer to a png_struct as the first argument. +Many (in particular the png_set and png_get APIs) also require a pointer +to png_info as the second argument. Some application visible macros +defined in png.h designed for basic data access (reading and writing +integers in the PNG format) don't take a png_info pointer, but it's almost +always safe to assume that a (png_struct*) has to be passed to call an API +function. + +You can have more than one png_info structure associated with an image, +as illustrated in pngtest.c, one for information valid prior to the +IDAT chunks and another (called "end_info" below) for things after them. The png.h header file is an invaluable reference for programming with libpng. And while I'm on the topic, make sure you include the libpng header file: #include +and also (as of libpng-1.5.0) the zlib header file, if you need it: + +#include + +.SS Types + +The png.h header file defines a number of integral types used by the +APIs. Most of these are fairly obvious; for example types corresponding +to integers of particular sizes and types for passing color values. + +One exception is how non-integral numbers are handled. For application +convenience most APIs that take such numbers have C (double) arguments, +however internally PNG, and libpng, use 32 bit signed integers and encode +the value by multiplying by 100,000. As of libpng 1.5.0 a convenience +macro PNG_FP_1 is defined in png.h along with a type (png_fixed_point) +which is simply (png_int_32). + +All APIs that take (double) arguments also have a matching API that +takes the corresponding fixed point integer arguments. The fixed point +API has the same name as the floating point one with "_fixed" appended. +The actual range of values permitted in the APIs is frequently less than +the full range of (png_fixed_point) (-21474 to +21474). When APIs require +a non-negative argument the type is recorded as png_uint_32 above. Consult +the header file and the text below for more information. + +Special care must be take with sCAL chunk handling because the chunk itself +uses non-integral values encoded as strings containing decimal floating point +numbers. See the comments in the header file. + +.SS Configuration + +The main header file function declarations are frequently protected by C +preprocessing directives of the form: + + #ifdef PNG_feature_SUPPORTED + declare-function + #endif + ... + #ifdef PNG_feature_SUPPORTED + use-function + #endif + +The library can be built without support for these APIs, although a +standard build will have all implemented APIs. Application programs +should check the feature macros before using an API for maximum +portability. From libpng 1.5.0 the feature macros set during the build +of libpng are recorded in the header file "pnglibconf.h" and this file +is always included by png.h. + +If you don't need to change the library configuration from the default, skip to +the next section ("Reading"). + +Notice that some of the makefiles in the 'scripts' directory and (in 1.5.0) all +of the build project files in the 'projects' directory simply copy +scripts/pnglibconf.h.prebuilt to pnglibconf.h. This means that these build +systems do not permit easy auto-configuration of the library - they only +support the default configuration. + +The easiest way to make minor changes to the libpng configuration when +auto-configuration is supported is to add definitions to the command line +using (typically) CPPFLAGS. For example: + +CPPFLAGS=-DPNG_NO_FLOATING_ARITHMETIC + +will change the internal libpng math implementation for gamma correction and +other arithmetic calculations to fixed point, avoiding the need for fast +floating point support. The result can be seen in the generated pnglibconf.h - +make sure it contains the changed feature macro setting. + +If you need to make more extensive configuration changes - more than one or two +feature macro settings - you can either add -DPNG_USER_CONFIG to the build +command line and put a list of feature macro settings in pngusr.h or you can set +DFA_XTRA (a makefile variable) to a file containing the same information in the +form of 'option' settings. + +A. Changing pnglibconf.h + +A variety of methods exist to build libpng. Not all of these support +reconfiguration of pnglibconf.h. To reconfigure pnglibconf.h it must either be +rebuilt from scripts/pnglibconf.dfa using awk or it must be edited by hand. + +Hand editing is achieved by copying scripts/pnglibconf.h.prebuilt to +pnglibconf.h and changing the lines defining the supported features, paying +very close attention to the 'option' information in scripts/pnglibconf.dfa +that describes those features and their requirements. This is easy to get +wrong. + +B. Configuration using DFA_XTRA + +Rebuilding from pnglibconf.dfa is easy if a functioning 'awk', or a later +variant such as 'nawk' or 'gawk', is available. The configure build will +automatically find an appropriate awk and build pnglibconf.h. +The scripts/pnglibconf.mak file contains a set of make rules for doing the +same thing if configure is not used, and many of the makefiles in the scripts +directory use this approach. + +When rebuilding simply write a new file containing changed options and set +DFA_XTRA to the name of this file. This causes the build to append the new file +to the end of scripts/pnglibconf.dfa. The pngusr.dfa file should contain lines +of the following forms: + +everything = off + +This turns all optional features off. Include it at the start of pngusr.dfa to +make it easier to build a minimal configuration. You will need to turn at least +some features on afterward to enable either reading or writing code, or both. + +option feature on +option feature off + +Enable or disable a single feature. This will automatically enable other +features required by a feature that is turned on or disable other features that +require a feature which is turned off. Conflicting settings will cause an error +message to be emitted by awk. + +setting feature default value + +Changes the default value of setting 'feature' to 'value'. There are a small +number of settings listed at the top of pnglibconf.h, they are documented in the +source code. Most of these values have performance implications for the library +but most of them have no visible effect on the API. Some can also be overridden +from the API. + +This method of building a customized pnglibconf.h is illustrated in +contrib/pngminim/*. See the "$(PNGCONF):" target in the makefile and +pngusr.dfa in these directories. + +C. Configuration using PNG_USR_CONFIG + +If -DPNG_USR_CONFIG is added to the CFLAGS when pnglibconf.h is built the file +pngusr.h will automatically be included before the options in +scripts/pnglibconf.dfa are processed. Your pngusr.h file should contain only +macro definitions turning features on or off or setting settings. + +Apart from the global setting "everything = off" all the options listed above +can be set using macros in pngusr.h: + +#define PNG_feature_SUPPORTED + +is equivalent to: + +option feature on + +#define PNG_NO_feature + +is equivalent to: + +option feature off + +#define PNG_feature value + +is equivalent to: + +setting feature default value + +Notice that in both cases, pngusr.dfa and pngusr.h, the contents of the +pngusr file you supply override the contents of scripts/pnglibconf.dfa + +If confusing or incomprehensible behavior results it is possible to +examine the intermediate file pnglibconf.dfn to find the full set of +dependency information for each setting and option. Simply locate the +feature in the file and read the C comments that precede it. + +This method is also illustrated in the contrib/pngminim/* makefiles and +pngusr.h. + .SH III. Reading We'll now walk you through the possible functions to call when reading @@ -947,13 +1308,15 @@ Customizing libpng. FILE *fp = fopen(file_name, "rb"); if (!fp) { - return (ERROR); + return (ERROR); } + fread(header, 1, number, fp); is_png = !png_sig_cmp(header, 0, number); + if (!is_png) { - return (NOT_PNG); + return (NOT_PNG); } @@ -969,33 +1332,27 @@ The structure allocation functions quietly return NULL if they fail to create the structure, so your application should check for that. png_structp png_ptr = png_create_read_struct - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, + (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, user_error_fn, user_warning_fn); + if (!png_ptr) - return (ERROR); + return (ERROR); png_infop info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) { - png_destroy_read_struct(&png_ptr, + png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL); - return (ERROR); - } - - png_infop end_info = png_create_info_struct(png_ptr); - if (!end_info) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); + return (ERROR); } If you want to use your own memory allocation routines, -define PNG_USER_MEM_SUPPORTED and use +use a libpng that was built with PNG_USER_MEM_SUPPORTED defined, and use png_create_read_struct_2() instead of png_create_read_struct(): png_structp png_ptr = png_create_read_struct_2 - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, + (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, user_error_fn, user_warning_fn, (png_voidp) user_mem_ptr, user_malloc_fn, user_free_fn); @@ -1007,7 +1364,7 @@ handling and memory alloc/free functions. When libpng encounters an error, it expects to longjmp back to your routine. Therefore, you will need to call setjmp and pass your png_jmpbuf(png_ptr). If you read the file from different -routines, you will need to update the jmpbuf field every time you enter +routines, you will need to update the longjmp buffer every time you enter a new routine that will call a png_*() function. See your documentation of setjmp/longjmp for your compiler for more @@ -1019,12 +1376,15 @@ free any memory. if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, + png_destroy_read_struct(&png_ptr, &info_ptr, &end_info); - fclose(fp); - return (ERROR); + fclose(fp); + return (ERROR); } +Pass (png_infopp)NULL instead of &end_info if you didn't create +an end_info structure. + If you would rather avoid the complexity of setjmp/longjmp issues, you can compile libpng with PNG_NO_SETJMP, in which case errors will result in a call to PNG_ABORT() which defaults to abort(). @@ -1058,12 +1418,37 @@ where the default size is 8192 bytes. Note that the buffer size is changed immediately and the buffer is reallocated immediately, instead of setting a flag to be acted upon later. +If you want CRC errors to be handled in a different manner than +the default, use + + png_set_crc_action(png_ptr, crit_action, ancil_action); + +The values for png_set_crc_action() say how libpng is to handle CRC errors in +ancillary and critical chunks, and whether to use the data contained +therein. Note that it is impossible to "discard" data in a critical +chunk. + +Choices for (int) crit_action are + PNG_CRC_DEFAULT 0 error/quit + PNG_CRC_ERROR_QUIT 1 error/quit + PNG_CRC_WARN_USE 3 warn/use data + PNG_CRC_QUIET_USE 4 quiet/use data + PNG_CRC_NO_CHANGE 5 use the current value + +Choices for (int) ancil_action are + PNG_CRC_DEFAULT 0 error/quit + PNG_CRC_ERROR_QUIT 1 error/quit + PNG_CRC_WARN_DISCARD 2 warn/discard data + PNG_CRC_WARN_USE 3 warn/use data + PNG_CRC_QUIET_USE 4 quiet/use data + PNG_CRC_NO_CHANGE 5 use the current value + .SS Setting up callback code You can set up a callback function to handle any unknown chunks in the input stream. You must supply the function - read_chunk_callback(png_ptr ptr, + read_chunk_callback(png_structp png_ptr, png_unknown_chunkp chunk); { /* The unknown chunk structure contains your @@ -1109,8 +1494,8 @@ called after each row has been read, which you can use to control a progress meter or the like. It's demonstrated in pngtest.c. You must supply a function - void read_row_callback(png_ptr ptr, png_uint_32 row, - int pass); + void read_row_callback(png_structp png_ptr, + png_uint_32 row, int pass); { /* put your code here */ } @@ -1121,6 +1506,19 @@ To inform libpng about your function, use png_set_read_status_fn(png_ptr, read_row_callback); +When this function is called the row has already been completely processed and +the 'row' and 'pass' refer to the next row to be handled. For the +non-interlaced case the row that was just handled is simply one less than the +passed in row number, and pass will always be 0. For the interlaced case the +same applies unless the row value is 0, in which case the row just handled was +the last one from one of the preceding passes. Because interlacing may skip a +pass you cannot be sure that the preceding pass is just 'pass-1', if you really +need to know what the last pass is record (row,pass) from the callback and use +the last recorded value each time. + +As with the user transform you can find the output row using the +PNG_ROW_FROM_PASS_ROW macro. + .SS Unknown-chunk handling Now you get to set the way the library processes unknown chunks in the @@ -1136,14 +1534,17 @@ chunk types. To change this, you can call: 1: ignore; do not keep 2: keep only if safe-to-copy 3: keep even if unsafe-to-copy + You can use these definitions: PNG_HANDLE_CHUNK_AS_DEFAULT 0 PNG_HANDLE_CHUNK_NEVER 1 PNG_HANDLE_CHUNK_IF_SAFE 2 PNG_HANDLE_CHUNK_ALWAYS 3 + chunk_list - list of chunks affected (a byte string, five bytes per chunk, NULL or '\0' if num_chunks is 0) + num_chunks - number of chunks affected; if 0, all unknown chunks are affected. If nonzero, only the chunks in the list are affected @@ -1155,6 +1556,8 @@ according to the "keep" directive. If a chunk is named in successive instances of png_set_keep_unknown_chunks(), the final instance will take precedence. The IHDR and IEND chunks should not be named in chunk_list; if they are, libpng will process them normally anyway. +If you know that your application will never make use of some particular +chunks, use PNG_HANDLE_CHUNK_NEVER (or 1) as demonstrated below. Here is an example of the usage of png_set_keep_unknown_chunks(), where the private "vpAg" chunk will later be processed by a user chunk @@ -1179,8 +1582,10 @@ callback function: #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) /* ignore all unknown chunks: */ png_set_keep_unknown_chunks(read_ptr, 1, NULL, 0); + /* except for vpAg: */ png_set_keep_unknown_chunks(read_ptr, 2, vpAg, 1); + /* also ignore unused known chunks: */ png_set_keep_unknown_chunks(read_ptr, 1, unused_chunks, (int)sizeof(unused_chunks)/5); @@ -1193,7 +1598,7 @@ large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns. Since very few applications really need to process such large images, we have imposed an arbitrary 1-million limit on rows and columns. Larger images will be rejected immediately with a png_error() call. If -you wish to override this limit, you can use +you wish to change this limit, you can use png_set_user_limits(png_ptr, width_max, height_max); @@ -1203,6 +1608,10 @@ anyway because of potential buffer overflow conditions). You should put this statement after you create the PNG structure and before calling png_read_info(), png_read_png(), or png_process_data(). + +When writing a PNG datastream, put this statement before calling +png_write_info() or png_write_png(). + If you need to retrieve the limits that are being applied, use width_max = png_get_user_width_max(png_ptr); @@ -1233,6 +1642,242 @@ and you can retrieve the limit with Any chunks that would cause either of these limits to be exceeded will be ignored. +.SS Information about your system + +If you intend to display the PNG or to incorporate it in other image data you +need to tell libpng information about your display or drawing surface so that +libpng can convert the values in the image to match the display. + +From libpng-1.5.4 this information can be set before reading the PNG file +header. In earlier versions png_set_gamma() existed but behaved incorrectly if +called before the PNG file header had been read and png_set_alpha_mode() did not +exist. + +If you need to support versions prior to libpng-1.5.4 test the version number +as illustrated below using "PNG_LIBPNG_VER >= 10504" and follow the procedures +described in the appropriate manual page. + +You give libpng the encoding expected by your system expressed as a 'gamma' +value. You can also specify a default encoding for the PNG file in +case the required information is missing from the file. By default libpng +assumes that the PNG data matches your system, to keep this default call: + + png_set_gamma(png_ptr, screen_gamma, 1/screen_gamma/*file gamma*/); + +or you can use the fixed point equivalent: + + png_set_gamma_fixed(png_ptr, PNG_FP_1*screen_gamma, PNG_FP_1/screen_gamma); + +If you don't know the gamma for your system it is probably 2.2 - a good +approximation to the IEC standard for display systems (sRGB). If images are +too contrasty or washed out you got the value wrong - check your system +documentation! + +Many systems permit the system gamma to be changed via a lookup table in the +display driver, a few systems, including older Macs, change the response by +default. As of 1.5.4 three special values are available to handle common +situations: + + PNG_DEFAULT_sRGB: Indicates that the system conforms to the IEC 61966-2-1 + standard. This matches almost all systems. + PNG_GAMMA_MAC_18: Indicates that the system is an older (pre Mac OS 10.6) + Apple Macintosh system with the default settings. + PNG_GAMMA_LINEAR: Just the fixed point value for 1.0 - indicates that the + system expects data with no gamma encoding. + +You would use the linear (unencoded) value if you need to process the pixel +values further because this avoids the need to decode and reencode each +component value whenever arithmetic is performed. A lot of graphics software +uses linear values for this reason, often with higher precision component values +to preserve overall accuracy. + +The second thing you may need to tell libpng about is how your system handles +alpha channel information. Some, but not all, PNG files contain an alpha +channel. To display these files correctly you need to compose the data onto a +suitable background, as described in the PNG specification. + +Libpng only supports composing onto a single color (using png_set_background; +see below). Otherwise you must do the composition yourself and, in this case, +you may need to call png_set_alpha_mode: + +#if PNG_LIBPNG_VER >= 10504 + png_set_alpha_mode(png_ptr, mode, screen_gamma); +#else + png_set_gamma(png_ptr, screen_gamma, 1.0/screen_gamma); +#endif + +The screen_gamma value is the same as the argument to png_set_gamma; however, +how it affects the output depends on the mode. png_set_alpha_mode() sets the +file gamma default to 1/screen_gamma, so normally you don't need to call +png_set_gamma. If you need different defaults call png_set_gamma() before +png_set_alpha_mode() - if you call it after it will override the settings made +by png_set_alpha_mode(). + +The mode is as follows: + + PNG_ALPHA_PNG: The data is encoded according to the PNG specification. Red, +green and blue, or gray, components are gamma encoded color +values and are not premultiplied by the alpha value. The +alpha value is a linear measure of the contribution of the +pixel to the corresponding final output pixel. + +You should normally use this format if you intend to perform +color correction on the color values; most, maybe all, color +correction software has no handling for the alpha channel and, +anyway, the math to handle pre-multiplied component values is +unnecessarily complex. + +Before you do any arithmetic on the component values you need +to remove the gamma encoding and multiply out the alpha +channel. See the PNG specification for more detail. It is +important to note that when an image with an alpha channel is +scaled, linear encoded, pre-multiplied component values must +be used! + +The remaining modes assume you don't need to do any further color correction or +that if you do, your color correction software knows all about alpha (it +probably doesn't!) + + PNG_ALPHA_STANDARD: The data libpng produces +is encoded in the standard way +assumed by most correctly written graphics software. +The gamma encoding will be removed by libpng and the +linear component values will be pre-multiplied by the +alpha channel. + +With this format the final image must be re-encoded to +match the display gamma before the image is displayed. +If your system doesn't do that, yet still seems to +perform arithmetic on the pixels without decoding them, +it is broken - check out the modes below. + +With PNG_ALPHA_STANDARD libpng always produces linear +component values, whatever screen_gamma you supply. The +screen_gamma value is, however, used as a default for +the file gamma if the PNG file has no gamma information. + +If you call png_set_gamma() after png_set_alpha_mode() you +will override the linear encoding. Instead the +pre-multiplied pixel values will be gamma encoded but +the alpha channel will still be linear. This may +actually match the requirements of some broken software, +but it is unlikely. + +While linear 8-bit data is often used it has +insufficient precision for any image with a reasonable +dynamic range. To avoid problems, and if your software +supports it, use png_set_expand_16() to force all +components to 16 bits. + + PNG_ALPHA_OPTIMIZED: This mode is the same +as PNG_ALPHA_STANDARD except that +completely opaque pixels are gamma encoded according to +the screen_gamma value. Pixels with alpha less than 1.0 +will still have linear components. + +Use this format if you have control over your +compositing software and do don't do other arithmetic +(such as scaling) on the data you get from libpng. Your +compositing software can simply copy opaque pixels to +the output but still has linear values for the +non-opaque pixels. + +In normal compositing, where the alpha channel encodes +partial pixel coverage (as opposed to broad area +translucency), the inaccuracies of the 8-bit +representation of non-opaque pixels are irrelevant. + +You can also try this format if your software is broken; +it might look better. + + PNG_ALPHA_BROKEN: This is PNG_ALPHA_STANDARD; +however, all component values, +including the alpha channel are gamma encoded. This is +an appropriate format to try if your software, or more +likely hardware, is totally broken, i.e., if it performs +linear arithmetic directly on gamma encoded values. + +In most cases of broken software or hardware the bug in the final display +manifests as a subtle halo around composited parts of the image. You may not +even perceive this as a halo; the composited part of the image may simply appear +separate from the background, as though it had been cut out of paper and pasted +on afterward. + +If you don't have to deal with bugs in software or hardware, or if you can fix +them, there are three recommended ways of using png_set_alpha_mode(): + + png_set_alpha_mode(png_ptr, PNG_ALPHA_PNG, + screen_gamma); + +You can do color correction on the result (libpng does not currently +support color correction internally). When you handle the alpha channel +you need to undo the gamma encoding and multiply out the alpha. + + png_set_alpha_mode(png_ptr, PNG_ALPHA_STANDARD, + screen_gamma); + png_set_expand_16(png_ptr); + +If you are using the high level interface, don't call png_set_expand_16(); +instead pass PNG_TRANSFORM_EXPAND_16 to the interface. + +With this mode you can't do color correction, but you can do arithmetic, +including composition and scaling, on the data without further processing. + + png_set_alpha_mode(png_ptr, PNG_ALPHA_OPTIMIZED, + screen_gamma); + +You can avoid the expansion to 16-bit components with this mode, but you +lose the ability to scale the image or perform other linear arithmetic. +All you can do is compose the result onto a matching output. Since this +mode is libpng-specific you also need to write your own composition +software. + +If you don't need, or can't handle, the alpha channel you can call +png_set_background() to remove it by compositing against a fixed color. Don't +call png_set_strip_alpha() to do this - it will leave spurious pixel values in +transparent parts of this image. + + png_set_background(png_ptr, &background_color, + PNG_BACKGROUND_GAMMA_SCREEN, 0, 1); + +The background_color is an RGB or grayscale value according to the data format +libpng will produce for you. Because you don't yet know the format of the PNG +file, if you call png_set_background at this point you must arrange for the +format produced by libpng to always have 8-bit or 16-bit components and then +store the color as an 8-bit or 16-bit color as appropriate. The color contains +separate gray and RGB component values, so you can let libpng produce gray or +RGB output according to the input format, but low bit depth grayscale images +must always be converted to at least 8-bit format. (Even though low bit depth +grayscale images can't have an alpha channel they can have a transparent +color!) + +You set the transforms you need later, either as flags to the high level +interface or libpng API calls for the low level interface. For reference the +settings and API calls required are: + +8-bit values: + PNG_TRANSFORM_SCALE_16 | PNG_EXPAND + png_set_expand(png_ptr); png_set_scale_16(png_ptr); + + If you must get exactly the same inaccurate results + produced by default in versions prior to libpng-1.5.4, + use PNG_TRANSFORM_STRIP_16 and png_set_strip_16(png_ptr) + instead. + +16-bit values: + PNG_TRANSFORM_EXPAND_16 + png_set_expand_16(png_ptr); + +In either case palette image data will be expanded to RGB. If you just want +color data you can add PNG_TRANSFORM_GRAY_TO_RGB or png_set_gray_to_rgb(png_ptr) +to the list. + +Calling png_set_background before the PNG file header is read will not work +prior to libpng-1.5.4. Because the failure may result in unexpected warnings or +errors it is therefore much safer to call png_set_background after the head has +been read. Unfortunately this means that prior to libpng-1.5.4 it cannot be +used with the high level interface. + .SS The high-level read interface At this point there are two ways to proceed; through the high-level @@ -1242,8 +1887,10 @@ the entire image into memory, and (b) the input transformations you want to do are limited to the following set: PNG_TRANSFORM_IDENTITY No transformation - PNG_TRANSFORM_STRIP_16 Strip 16-bit samples to - 8 bits + PNG_TRANSFORM_SCALE_16 Strip 16-bit samples to + 8-bit accurately + PNG_TRANSFORM_STRIP_16 Chop 16-bit samples to + 8-bit less accurately PNG_TRANSFORM_STRIP_ALPHA Discard the alpha channel PNG_TRANSFORM_PACKING Expand 1, 2 and 4-bit samples to bytes @@ -1262,6 +1909,7 @@ you want to do are limited to the following set: PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples PNG_TRANSFORM_GRAY_TO_RGB Expand grayscale samples to RGB (or GA to RGBA) + PNG_TRANSFORM_EXPAND_16 Expand samples to 16 bits (This excludes setting a background color, doing gamma transformation, quantizing, and setting filler.) If this is the case, simply do this: @@ -1293,17 +1941,22 @@ row_pointers prior to calling png_read_png() with if (height > PNG_UINT_32_MAX/png_sizeof(png_byte)) png_error (png_ptr, - "Image is too tall to process in memory"); + "Image is too tall to process in memory"); + if (width > PNG_UINT_32_MAX/pixel_size) png_error (png_ptr, - "Image is too wide to process in memory"); + "Image is too wide to process in memory"); + row_pointers = png_malloc(png_ptr, - height*png_sizeof(png_bytep)); + height*png_sizeof(png_bytep)); + for (int i=0; i= 10504 + png_set_scale_16(png_ptr); +#else + png_set_strip_16(png_ptr); +#endif + +(The more accurate "png_set_scale_16()" API became available in libpng version +1.5.4). + +If you need to process the alpha channel on the image separately from the image +data (for example if you convert it to a bitmap mask) it is possible to have +libpng strip the channel leaving just RGB or gray data: + + if (color_type & PNG_COLOR_MASK_ALPHA) + png_set_strip_alpha(png_ptr); + +If you strip the alpha channel you need to find some other way of dealing with +the information. If, instead, you want to convert the image to an opaque +version with no alpha channel use png_set_background; see below. + +As of libpng version 1.5.2, almost all useful expansions are supported, the +major ommissions are conversion of grayscale to indexed images (which can be +done trivially in the application) and conversion of indexed to grayscale (which +can be done by a trivial manipulation of the palette.) In the following table, the 01 means grayscale with depth<8, 31 means indexed with depth<8, other numerals represent the color type, "T" means the tRNS chunk is present, A means an alpha channel is present, and O means tRNS or alpha is present but all pixels in the image are opaque. - FROM 01 31 0 0T 0O 2 2T 2O 3 3T 3O 4A 4O 6A 6O + FROM 01 31 0 0T 0O 2 2T 2O 3 3T 3O 4A 4O 6A 6O TO - 01 - - 31 - - 0 1 - - 0T - - 0O - - 2 GX - - 2T - - 2O - - 3 1 - - 3T - - 3O - - 4A T - - 4O - - 6A GX TX TX - - 6O GX TX - + 01 - [G] - - - - - - - - - - - - - + 31 [Q] Q [Q] [Q] [Q] Q Q Q Q Q Q [Q] [Q] Q Q + 0 1 G + . . G G G G G G B B GB GB + 0T lt Gt t + . Gt G G Gt G G Bt Bt GBt GBt + 0O lt Gt t . + Gt Gt G Gt Gt G Bt Bt GBt GBt + 2 C P C C C + . . C - - CB CB B B + 2T Ct - Ct C C t + t - - - CBt CBt Bt Bt + 2O Ct - Ct C C t t + - - - CBt CBt Bt Bt + 3 [Q] p [Q] [Q] [Q] Q Q Q + . . [Q] [Q] Q Q + 3T [Qt] p [Qt][Q] [Q] Qt Qt Qt t + t [Qt][Qt] Qt Qt + 3O [Qt] p [Qt][Q] [Q] Qt Qt Qt t t + [Qt][Qt] Qt Qt + 4A lA G A T T GA GT GT GA GT GT + BA G GBA + 4O lA GBA A T T GA GT GT GA GT GT BA + GBA G + 6A CA PA CA C C A T tT PA P P C CBA + BA + 6O CA PBA CA C C A tT T PA P P CBA C BA + Within the matrix, + "+" identifies entries where 'from' and 'to' are the same. "-" means the transformation is not supported. + "." means nothing is necessary (a tRNS chunk can just be ignored). + "t" means the transformation is obtained by png_set_tRNS. + "A" means the transformation is obtained by png_set_add_alpha(). "X" means the transformation is obtained by png_set_expand(). "1" means the transformation is obtained by - png_set_expand_gray_1_2_4_to_8 - "G" means the transformation is obtained by - png_set_gray_to_rgb(). + png_set_expand_gray_1_2_4_to_8() (and by png_set_expand() if there + is no transparency in the original or the final format). + "C" means the transformation is obtained by png_set_gray_to_rgb(). + "G" means the transformation is obtained by png_set_rgb_to_gray(). "P" means the transformation is obtained by png_set_expand_palette_to_rgb(). - "T" means the transformation is obtained by - png_set_tRNS_to_alpha(). - -PNG can have files with 16 bits per channel. If you only can handle -8 bits per channel, this will strip the pixels down to 8 bit. - - if (bit_depth == 16) - png_set_strip_16(png_ptr); - -If, for some reason, you don't need the alpha channel on an image, -and you want to remove it rather than combining it with the background -(but the image author certainly had in mind that you *would* combine -it with the background, so that's what you should probably do): - - if (color_type & PNG_COLOR_MASK_ALPHA) - png_set_strip_alpha(png_ptr); + "p" means the transformation is obtained by png_set_packing(). + "Q" means the transformation is obtained by png_set_quantize(). + "T" means the transformation is obtained by png_set_tRNS_to_alpha(). + "B" means the transformation is obtained by png_set_background(), or + png_strip_alpha(). + +When an entry has multiple transforms listed all are required to cause the +right overall transformation. When two transforms are separated by a comma +either will do the job. When transforms are enclosed in [] the transform should +do the job but this is currently unimplemented - a different format will result +if the suggested transformations are used. In PNG files, the alpha channel in an image is the level of opacity. If you need the alpha channel in an image to @@ -1754,7 +2578,7 @@ files. This code expands to 1 pixel per byte without changing the values of the pixels: if (bit_depth < 8) - png_set_packing(png_ptr); + png_set_packing(png_ptr); PNG files have possible bit depths of 1, 2, 4, 8, and 16. All pixels stored in a PNG image have been "scaled" or "shifted" up to the next @@ -1766,20 +2590,20 @@ image. This call reduces the pixels back down to the original bit depth: png_color_8p sig_bit; if (png_get_sBIT(png_ptr, info_ptr, &sig_bit)) - png_set_shift(png_ptr, sig_bit); + png_set_shift(png_ptr, sig_bit); PNG files store 3-color pixels in red, green, blue order. This code changes the storage of the pixels to blue, green, red: if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_bgr(png_ptr); + png_set_bgr(png_ptr); PNG files store RGB pixels packed into 3 or 6 bytes. This code expands them into 4 or 8 bytes for windowing systems that need them in this format: if (color_type == PNG_COLOR_TYPE_RGB) - png_set_filler(png_ptr, filler, PNG_FILLER_BEFORE); + png_set_filler(png_ptr, filler, PNG_FILLER_BEFORE); where "filler" is the 8 or 16-bit number to fill with, and the location is either PNG_FILLER_BEFORE or PNG_FILLER_AFTER, depending upon whether @@ -1792,8 +2616,8 @@ Note that png_set_filler() does not change the color type. If you want to do that, you can add a true alpha channel with if (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_GRAY) - png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER); + color_type == PNG_COLOR_TYPE_GRAY) + png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER); where "filler" contains the alpha value to assign to each pixel. This function was added in libpng-1.2.7. @@ -1802,175 +2626,157 @@ If you are reading an image with an alpha channel, and you need the data as ARGB instead of the normal PNG format RGBA: if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_swap_alpha(png_ptr); + png_set_swap_alpha(png_ptr); For some uses, you may want a grayscale image to be represented as RGB. This code will do that conversion: if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); + png_set_gray_to_rgb(png_ptr); Conversely, you can convert an RGB or RGBA image to grayscale or grayscale with alpha. if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_rgb_to_gray_fixed(png_ptr, error_action, - int red_weight, int green_weight); + png_set_rgb_to_gray(png_ptr, error_action, double red_weight, + double green_weight); error_action = 1: silently do the conversion + error_action = 2: issue a warning if the original image has any pixel where red != green or red != blue + error_action = 3: issue an error and abort the conversion if the original image has any pixel where red != green or red != blue - red_weight: weight of red component times 100000 - green_weight: weight of green component times 100000 + red_weight: weight of red component + + green_weight: weight of green component If either weight is negative, default - weights (21268, 71514) are used. + weights are used. + +In the corresponding fixed point API the red_weight and green_weight values are +simply scaled by 100,000: + + png_set_rgb_to_gray(png_ptr, error_action, png_fixed_point red_weight, + png_fixed_point green_weight); If you have set error_action = 1 or 2, you can later check whether the image really was gray, after processing the image rows, with the png_get_rgb_to_gray_status(png_ptr) function. It will return a png_byte that is zero if the image was gray or -1 if there were any non-gray pixels. bKGD and sBIT data +1 if there were any non-gray pixels. Background and sBIT data will be silently converted to grayscale, using the green channel -data, regardless of the error_action setting. - -With red_weight+green_weight<=100000, -the normalized graylevel is computed: +data for sBIT, regardless of the error_action setting. - int rw = red_weight * 65536; - int gw = green_weight * 65536; - int bw = 65536 - (rw + gw); - gray = (rw*red + gw*green + bw*blue)/65536; +The default values come from the PNG file cHRM chunk if present; otherwise, the +defaults correspond to the ITU-R recommendation 709, and also the sRGB color +space, as recommended in the Charles Poynton's Colour FAQ, +, in section 9: -The default values approximate those recommended in the Charles -Poynton's Color FAQ, -Copyright (c) 1998-01-04 Charles Poynton + - Y = 0.212671 * R + 0.715160 * G + 0.072169 * B + Y = 0.2126 * R + 0.7152 * G + 0.0722 * B -Libpng approximates this with +Previous versions of this document, 1998 through 2002, recommended a slightly +different formula: - Y = 0.21268 * R + 0.7151 * G + 0.07217 * B + Y = 0.212671 * R + 0.715160 * G + 0.072169 * B -which can be expressed with integers as +Libpng uses an integer approximation: - Y = (6969 * R + 23434 * G + 2365 * B)/32768 + Y = (6968 * R + 23434 * G + 2366 * B)/32768 The calculation is done in a linear colorspace, if the image gamma -is known. +can be determined. -If you have a grayscale and you are using png_set_expand_depth(), -png_set_expand(), or png_set_gray_to_rgb to change to truecolor or to -a higher bit-depth, you must either supply the background color as a gray -value at the original file bit-depth (need_expand = 1) or else supply the -background color as an RGB triplet at the final, expanded bit depth -(need_expand = 0). Similarly, if you are reading a paletted image, you -must either supply the background color as a palette index (need_expand = 1) -or as an RGB triplet that may or may not be in the palette (need_expand = 0). +The png_set_background() function has been described already; it tells libpng to +composite images with alpha or simple transparency against the supplied +background color. For compatibility with versions of libpng earlier than +libpng-1.5.4 it is recommended that you call the function after reading the file +header, even if you don't want to use the color in a bKGD chunk, if one exists. + +If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid), +you may use this color, or supply another color more suitable for +the current display (e.g., the background color from a web page). You +need to tell libpng how the color is represented, both the format of the +component values in the color (the number of bits) and the gamma encoding of the +color. The function takes two arguments, background_gamma_mode and need_expand +to convey this information, however only two combinations are likely to be +useful: png_color_16 my_background; png_color_16p image_background; if (png_get_bKGD(png_ptr, info_ptr, &image_background)) - png_set_background(png_ptr, image_background, - PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); + png_set_background(png_ptr, image_background, + PNG_BACKGROUND_GAMMA_FILE, 1/*needs to be expanded*/, 1); else - png_set_background(png_ptr, &my_background, - PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); - -The png_set_background() function tells libpng to composite images -with alpha or simple transparency against the supplied background -color. If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid), -you may use this color, or supply another color more suitable for -the current display (e.g., the background color from a web page). You -need to tell libpng whether the color is in the gamma space of the -display (PNG_BACKGROUND_GAMMA_SCREEN for colors you supply), the file -(PNG_BACKGROUND_GAMMA_FILE for colors from the bKGD chunk), or one -that is neither of these gammas (PNG_BACKGROUND_GAMMA_UNIQUE - I don't -know why anyone would use this, but it's here). - -To properly display PNG images on any kind of system, the application needs -to know what the display gamma is. Ideally, the user will know this, and -the application will allow them to set it. One method of allowing the user -to set the display gamma separately for each system is to check for a -SCREEN_GAMMA or DISPLAY_GAMMA environment variable, which will hopefully be -correctly set. - -Note that display_gamma is the overall gamma correction required to produce -pleasing results, which depends on the lighting conditions in the surrounding -environment. In a dim or brightly lit room, no compensation other than -the physical gamma exponent of the monitor is needed, while in a dark room -a slightly smaller exponent is better. - - double gamma, screen_gamma; - - if (/* We have a user-defined screen - gamma value */) - { - screen_gamma = user_defined_screen_gamma; - } - /* One way that applications can share the same - screen gamma value */ - else if ((gamma_str = getenv("SCREEN_GAMMA")) - != NULL) - { - screen_gamma = (double)atof(gamma_str); - } - /* If we don't have another value */ - else - { - screen_gamma = 2.2; /* A good guess for a - PC monitor in a bright office or a dim room */ - screen_gamma = 2.0; /* A good guess for a - PC monitor in a dark room */ - screen_gamma = 1.7 or 1.0; /* A good - guess for Mac systems */ - } + png_set_background(png_ptr, &my_background, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*do not expand*/, 1); + +The second call was described above - my_background is in the format of the +final, display, output produced by libpng. Because you now know the format of +the PNG it is possible to avoid the need to choose either 8-bit or 16-bit +output and to retain palette images (the palette colors will be modified +appropriately and the tRNS chunk removed.) However, if you are doing this, +take great care not to ask for transformations without checking first that +they apply! + +In the first call the background color has the original bit depth and color type +of the PNG file. So, for palette images the color is supplied as a palette +index and for low bit greyscale images the color is a reduced bit value in +image_background->gray. + +If you didn't call png_set_gamma() before reading the file header, for example +if you need your code to remain compatible with older versions of libpng prior +to libpng-1.5.4, this is the place to call it. + +Do not call it if you called png_set_alpha_mode(); doing so will damage the +settings put in place by png_set_alpha_mode(). (If png_set_alpha_mode() is +supported then you can certainly do png_set_gamma() before reading the PNG +header.) + +This API unconditionally sets the screen and file gamma values, so it will +override the value in the PNG file unless it is called before the PNG file +reading starts. For this reason you must always call it with the PNG file +value when you call it in this position: + + if (png_get_gAMA(png_ptr, info_ptr, &file_gamma)) + png_set_gamma(png_ptr, screen_gamma, file_gamma); -The png_set_gamma() function handles gamma transformations of the data. -Pass both the file gamma and the current screen_gamma. If the file does -not have a gamma value, you can pass one anyway if you have an idea what -it is (usually 0.45455 is a good guess for GIF images on PCs). Note -that file gammas are inverted from screen gammas. See the discussions -on gamma in the PNG specification for an excellent description of what -gamma is, and why all applications should support it. It is strongly -recommended that PNG viewers support gamma correction. - - if (png_get_gAMA(png_ptr, info_ptr, &gamma)) - png_set_gamma(png_ptr, screen_gamma, gamma); else png_set_gamma(png_ptr, screen_gamma, 0.45455); If you need to reduce an RGB file to a paletted file, or if a paletted file has more entries then will fit on your screen, png_set_quantize() -will do that. Note that this is a simple match dither that merely +will do that. Note that this is a simple match quantization that merely finds the closest color available. This should work fairly well with -optimized palettes, and fairly badly with linear color cubes. If you -pass a palette that is larger then maximum_colors, the file will +optimized palettes, but fairly badly with linear color cubes. If you +pass a palette that is larger than maximum_colors, the file will reduce the number of colors in the palette so it will fit into -maximum_colors. If there is a histogram, it will use it to make +maximum_colors. If there is a histogram, libpng will use it to make more intelligent choices when reducing the palette. If there is no histogram, it may not do as good a job. if (color_type & PNG_COLOR_MASK_COLOR) { if (png_get_valid(png_ptr, info_ptr, - PNG_INFO_PLTE)) + PNG_INFO_PLTE)) { png_uint_16p histogram = NULL; png_get_hIST(png_ptr, info_ptr, - &histogram); + &histogram); png_set_quantize(png_ptr, palette, num_palette, max_screen_colors, histogram, 1); } + else { png_color std_color_cube[MAX_SCREEN_COLORS] = @@ -1992,16 +2798,16 @@ zero): This function can also be used to invert grayscale and gray-alpha images: if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + color_type == PNG_COLOR_TYPE_GRAY_ALPHA) png_set_invert_mono(png_ptr); -PNG files store 16 bit pixels in network byte order (big-endian, +PNG files store 16-bit pixels in network byte order (big-endian, ie. most significant bits first). This code changes the storage to the other way (little-endian, i.e. least significant bits first, the way PCs store them): if (bit_depth == 16) - png_set_swap(png_ptr); + png_set_swap(png_ptr); If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you need to change the order the pixels are packed into bytes, you can use: @@ -2014,15 +2820,36 @@ the existing ones meets your needs. This is done by setting a callback with png_set_read_user_transform_fn(png_ptr, - read_transform_fn); + read_transform_fn); You must supply the function - void read_transform_fn(png_ptr ptr, row_info_ptr - row_info, png_bytep data) + void read_transform_fn(png_structp png_ptr, png_row_infop + row_info, png_bytep data) See pngtest.c for a working example. Your function will be called -after all of the other transformations have been processed. +after all of the other transformations have been processed. Take care with +interlaced images if you do the interlace yourself - the width of the row is the +width in 'row_info', not the overall image width. + +If supported, libpng provides two information routines that you can use to find +where you are in processing the image: + + png_get_current_pass_number(png_structp png_ptr); + png_get_current_row_number(png_structp png_ptr); + +Don't try using these outside a transform callback - firstly they are only +supported if user transforms are supported, secondly they may well return +unexpected results unless the row is actually being processed at the moment they +are called. + +With interlaced +images the value returned is the row in the input sub-image image. Use +PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to +find the output pixel (x,y) given an interlaced sub-image pixel (row,col,pass). + +The discussion of interlace handling above contains more information on how to +use these values. You can also set up a pointer to a user structure for use by your callback function, and you can inform libpng that your transform @@ -2030,7 +2857,7 @@ function will change the number of channels or bit depth with the function png_set_user_transform_info(png_ptr, user_ptr, - user_depth, user_channels); + user_depth, user_channels); The user's application, not libpng, is responsible for allocating and freeing any memory required for the user structure. @@ -2039,7 +2866,7 @@ You can retrieve the pointer via the function png_get_user_transform_ptr(). For example: voidp read_user_transform_ptr = - png_get_user_transform_ptr(png_ptr); + png_get_user_transform_ptr(png_ptr); The last thing to handle is interlacing; this is covered in detail below, but you must call the function here if you want libpng to handle expansion @@ -2049,13 +2876,16 @@ of the interlaced image. After setting the transformations, libpng can update your png_info structure to reflect any transformations you've requested with this -call. This is most useful to update the info structure's rowbytes -field so you can use it to allocate your image memory. This function -will also update your palette with the correct screen_gamma and -background if these have been given with the calls above. +call. png_read_update_info(png_ptr, info_ptr); +This is most useful to update the info structure's rowbytes +field so you can use it to allocate your image memory. This function +will also update your palette with the correct screen_gamma and +background if these have been given with the calls above. You may +only call png_read_update_info() once with a particular info_ptr. + After you call png_read_update_info(), you can allocate any memory you need to hold the image. The row data is simply raw byte data for all forms of images. As the actual allocation @@ -2064,6 +2894,15 @@ are allocating one large chunk, you will need to build an array of pointers to each row, as it will be needed for some of the functions below. +Remember: Before you call png_read_update_info(), the png_get_*() +functions return the values corresponding to the original PNG image. +After you call png_read_update_info the values refer to the image +that libpng will output. Consequently you must call all the png_set_ +functions before you call png_read_update_info(). This is particularly +important for png_set_interlace_handling() - if you are going to call +png_read_update_info() you must call png_set_interlace_handling() before +it unless you want to receive interlaced output. + .SS Reading image data After you've allocated memory, you can read the image data. @@ -2073,9 +2912,10 @@ call png_read_image() and libpng will read in all the image data and put it in the memory area supplied. You will need to pass in an array of pointers to each row. -This function automatically handles interlacing, so you don't need -to call png_set_interlace_handling() or call this function multiple -times, or any of that other stuff necessary with png_read_rows(). +This function automatically handles interlacing, so you don't +need to call png_set_interlace_handling() (unless you call +png_read_update_info()) or call this function multiple times, or any +of that other stuff necessary with png_read_rows(). png_read_image(png_ptr, row_pointers); @@ -2090,7 +2930,7 @@ use png_read_rows() instead. If there is no interlacing (check interlace_type == PNG_INTERLACE_NONE), this is simple: png_read_rows(png_ptr, row_pointers, NULL, - number_of_rows); + number_of_rows); where row_pointers is the same as in the png_read_image() call. @@ -2102,13 +2942,15 @@ a single row_pointer instead of an array of row_pointers: If the file is interlaced (interlace_type != 0 in the IHDR chunk), things get somewhat harder. The only current (PNG Specification version 1.2) -interlacing type for PNG is (interlace_type == PNG_INTERLACE_ADAM7) -is a somewhat complicated 2D interlace scheme, known as Adam7, that +interlacing type for PNG is (interlace_type == PNG_INTERLACE_ADAM7); +a somewhat complicated 2D interlace scheme, known as Adam7, that breaks down an image into seven smaller images of varying size, based -on an 8x8 grid. +on an 8x8 grid. This number is defined (from libpng 1.5) as +PNG_INTERLACE_ADAM7_PASSES in png.h libpng can fill out those images or it can give them to you "as is". -If you want them filled out, there are two ways to do that. The one +It is almost always better to have libpng handle the interlacing for you. +If you want the images filled out, there are two ways to do that. The one mentioned in the PNG specification is to expand each pixel to cover those pixels that have not been read yet (the "rectangle" method). This results in a blocky image for the first pass, which gradually @@ -2118,37 +2960,20 @@ rest of the image remaining whatever colors they were initialized to before the start of the read. The first method usually looks better, but tends to be slower, as there are more pixels to put in the rows. -If you don't want libpng to handle the interlacing details, just call -png_read_rows() seven times to read in all seven images. Each of the -images is a valid image by itself, or they can all be combined on an -8x8 grid to form a single image (although if you intend to combine them -you would be far better off using the libpng interlace handling). - -The first pass will return an image 1/8 as wide as the entire image -(every 8th column starting in column 0) and 1/8 as high as the original -(every 8th row starting in row 0), the second will be 1/8 as wide -(starting in column 4) and 1/8 as high (also starting in row 0). The -third pass will be 1/4 as wide (every 4th pixel starting in column 0) and -1/8 as high (every 8th row starting in row 4), and the fourth pass will -be 1/4 as wide and 1/4 as high (every 4th column starting in column 2, -and every 4th row starting in row 0). The fifth pass will return an -image 1/2 as wide, and 1/4 as high (starting at column 0 and row 2), -while the sixth pass will be 1/2 as wide and 1/2 as high as the original -(starting in column 1 and row 0). The seventh and final pass will be as -wide as the original, and 1/2 as high, containing all of the odd -numbered scanlines. Phew! - -If you want libpng to expand the images, call this before calling -png_start_read_image() or png_read_update_info(): +If, as is likely, you want libpng to expand the images, call this before +calling png_start_read_image() or png_read_update_info(): if (interlace_type == PNG_INTERLACE_ADAM7) - number_of_passes + number_of_passes = png_set_interlace_handling(png_ptr); -This will return the number of passes needed. Currently, this -is seven, but may change if another interlace type is added. -This function can be called even if the file is not interlaced, -where it will return one pass. +This will return the number of passes needed. Currently, this is seven, +but may change if another interlace type is added. This function can be +called even if the file is not interlaced, where it will return one pass. +You then need to read the whole image 'number_of_passes' times. Each time +will distribute the pixels from the current pass to the correct place in +the output image, so you need to supply the same rows to png_read_rows in +each pass. If you are not going to display the image after each pass, but are going to wait until the entire image is read in, use the sparkle @@ -2165,14 +2990,104 @@ not the data. Each pass only writes the pixels appropriate for that pass, and assumes the data from previous passes is still valid. png_read_rows(png_ptr, row_pointers, NULL, - number_of_rows); + number_of_rows); If you only want the first effect (the rectangles), do the same as before except pass the row buffer in the third parameter, and leave the second parameter NULL. png_read_rows(png_ptr, NULL, row_pointers, - number_of_rows); + number_of_rows); + +If you don't want libpng to handle the interlacing details, just call +png_read_rows() PNG_INTERLACE_ADAM7_PASSES times to read in all the images. +Each of the images is a valid image by itself, however you will almost +certainly need to distribute the pixels from each sub-image to the +correct place. This is where everything gets very tricky. + +If you want to retrieve the separate images you must pass the correct +number of rows to each successive call of png_read_rows(). The calculation +gets pretty complicated for small images, where some sub-images may +not even exist because either their width or height ends up zero. +libpng provides two macros to help you in 1.5 and later versions: + + png_uint_32 width = PNG_PASS_COLS(image_width, pass_number); + png_uint_32 height = PNG_PASS_ROWS(image_height, pass_number); + +Respectively these tell you the width and height of the sub-image +corresponding to the numbered pass. 'pass' is in in the range 0 to 6 - +this can be confusing because the specification refers to the same passes +as 1 to 7! Be careful, you must check both the width and height before +calling png_read_rows() and not call it for that pass if either is zero. + +You can, of course, read each sub-image row by row. If you want to +produce optimal code to make a pixel-by-pixel transformation of an +interlaced image this is the best approach; read each row of each pass, +transform it, and write it out to a new interlaced image. + +If you want to de-interlace the image yourself libpng provides further +macros to help that tell you where to place the pixels in the output image. +Because the interlacing scheme is rectangular - sub-image pixels are always +arranged on a rectangular grid - all you need to know for each pass is the +starting column and row in the output image of the first pixel plus the +spacing between each pixel. As of libpng 1.5 there are four macros to +retrieve this information: + + png_uint_32 x = PNG_PASS_START_COL(pass); + png_uint_32 y = PNG_PASS_START_ROW(pass); + png_uint_32 xStep = 1U << PNG_PASS_COL_SHIFT(pass); + png_uint_32 yStep = 1U << PNG_PASS_ROW_SHIFT(pass); + +These allow you to write the obvious loop: + + png_uint_32 input_y = 0; + png_uint_32 output_y = PNG_PASS_START_ROW(pass); + + while (output_y < output_image_height) + { + png_uint_32 input_x = 0; + png_uint_32 output_x = PNG_PASS_START_COL(pass); + + while (output_x < output_image_width) + { + image[output_y][output_x] = + subimage[pass][input_y][input_x++]; + + output_x += xStep; + } + + ++input_y; + output_y += yStep; + } + +Notice that the steps between successive output rows and columns are +returned as shifts. This is possible because the pixels in the subimages +are always a power of 2 apart - 1, 2, 4 or 8 pixels - in the original +image. In practice you may need to directly calculate the output coordinate +given an input coordinate. libpng provides two further macros for this +purpose: + + png_uint_32 output_x = PNG_COL_FROM_PASS_COL(input_x, pass); + png_uint_32 output_y = PNG_ROW_FROM_PASS_ROW(input_y, pass); + +Finally a pair of macros are provided to tell you if a particular image +row or column appears in a given pass: + + int col_in_pass = PNG_COL_IN_INTERLACE_PASS(output_x, pass); + int row_in_pass = PNG_ROW_IN_INTERLACE_PASS(output_y, pass); + +Bear in mind that you will probably also need to check the width and height +of the pass in addition to the above to be sure the pass even exists! + +With any luck you are convinced by now that you don't want to do your own +interlace handling. In reality normally the only good reason for doing this +is if you are processing PNG files on a pixel-by-pixel basis and don't want +to load the whole file into memory when it is interlaced. + +libpng includes a test program, pngvalid, that illustrates reading and +writing of interlaced images. If you can't get interlacing to work in your +code and don't want to leave it to libpng (the recommended approach), see +how pngvalid.c does it. .SS Finishing a sequential read @@ -2181,19 +3096,44 @@ low-level interface, you can finish reading the file. If you are interested in comments or time, which may be stored either before or after the image data, you should pass the separate png_info struct if you want to keep the comments from before and after the image -separate. If you are not interested, you can pass NULL. +separate. + + png_infop end_info = png_create_info_struct(png_ptr); + + if (!end_info) + { + png_destroy_read_struct(&png_ptr, &info_ptr, + (png_infopp)NULL); + return (ERROR); + } png_read_end(png_ptr, end_info); +If you are not interested, you should still call png_read_end() +but you can pass NULL, avoiding the need to create an end_info structure. + + png_read_end(png_ptr, (png_infop)NULL); + +If you don't call png_read_end(), then your file pointer will be +left pointing to the first chunk after the last IDAT, which is probably +not what you want if you expect to read something beyond the end of +the PNG datastream. + When you are done, you can free all memory allocated by libpng like this: png_destroy_read_struct(&png_ptr, &info_ptr, &end_info); +or, if you didn't create an end_info structure, + + png_destroy_read_struct(&png_ptr, &info_ptr, + (png_infopp)NULL); + It is also possible to individually free the info_ptr members that point to libpng-allocated storage with the following function: png_free_data(png_ptr, info_ptr, mask, seq) + mask - identifies data to be freed, a mask containing the bitwise OR of one or more of @@ -2203,6 +3143,7 @@ point to libpng-allocated storage with the following function: PNG_FREE_SCAL, PNG_FREE_SPLT, PNG_FREE_TEXT, PNG_FREE_UNKN, or simply PNG_FREE_ALL + seq - sequence number of item to be freed (-1 for all items) @@ -2220,13 +3161,15 @@ or so that it will free data that was allocated by the user with png_malloc() or png_zalloc() and passed in via a png_set_*() function, with png_data_freer(png_ptr, info_ptr, freer, mask) - mask - which data elements are affected - same choices as in png_free_data() + freer - one of PNG_DESTROY_WILL_FREE_DATA PNG_SET_WILL_FREE_DATA PNG_USER_WILL_FREE_DATA + mask - which data elements are affected + same choices as in png_free_data() + This function only affects data that has already been allocated. You can call this function after reading the PNG data but before calling any png_set_*() functions, to control whether the user or the png_set_*() @@ -2255,6 +3198,7 @@ it frees. If you need to turn the flag off for a chunk that was freed by your application instead of by libpng, you can use png_set_invalid(png_ptr, info_ptr, mask); + mask - identifies the chunks to be made invalid, containing the bitwise OR of one or more of @@ -2294,21 +3238,24 @@ png_infop info_ptr; png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, user_error_fn, user_warning_fn); + if (!png_ptr) return (ERROR); + info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) { - png_destroy_read_struct(&png_ptr, (png_infopp)NULL, - (png_infopp)NULL); - return (ERROR); + png_destroy_read_struct(&png_ptr, + (png_infopp)NULL, (png_infopp)NULL); + return (ERROR); } if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); + png_destroy_read_struct(&png_ptr, &info_ptr, + (png_infopp)NULL); + return (ERROR); } /* This one's new. You can provide functions @@ -2340,9 +3287,9 @@ png_infop info_ptr; { if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, + png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL); - return (ERROR); + return (ERROR); } /* This one's new also. Simply give it a chunk @@ -2359,6 +3306,12 @@ png_infop info_ptr; so there. */ png_process_data(png_ptr, info_ptr, buffer, length); + + /* At this point you can call png_process_data_skip if + you want to handle data the library will skip yourself; + it simply returns the number of bytes to skip (and stops + libpng skipping that number of bytes on the next + png_process_data call). return 0; } @@ -2379,6 +3332,19 @@ png_infop info_ptr; any). You may start getting rows before png_process_data() returns, so this is your last chance to prepare for that. + + This is where you turn on interlace handling, + assuming you don't want to do it yourself. + + If you need to you can stop the processing of + your original input data at this point by calling + png_process_data_pause. This returns the number + of unprocessed bytes from the last png_process_data + call - it is up to you to ensure that the next call + sees these bytes again. If you don't want to bother + with this you can get libpng to cache the unread + bytes by setting the 'save' parameter (see png.h) but + then libpng will have to copy the data internally. */ } @@ -2399,14 +3365,22 @@ png_infop info_ptr; supplying them because it may make your life easier. - For the non-NULL rows of interlaced images, + If you did not turn on interlace handling then + the callback is called for each row of each + sub-image when the image is interlaced. In this + case 'row_num' is the row in the sub-image, not + the row in the output image as it is in all other + cases. + + For the non-NULL rows of interlaced images when + you have switched on libpng interlace handling, you must call png_progressive_combine_row() passing in the row and the old row. You can call this function for NULL rows (it will just return) and for non-interlaced images (it just does the memcpy for you) if it will make the code easier. Thus, you can just do this for - all cases: + all cases if you switch on interlace handling; */ png_progressive_combine_row(png_ptr, old_row, @@ -2420,6 +3394,9 @@ png_infop info_ptr; for interlaced images), you will have to pass the current row, and the function will combine the old row and the new row. + + You can also call png_process_data_pause in this + callback - see above. */ } @@ -2454,10 +3431,9 @@ using the standard I/O functions, you will need to replace them with custom writing functions. See the discussion under Customizing libpng. FILE *fp = fopen(file_name, "wb"); + if (!fp) - { return (ERROR); - } Next, png_struct and png_info need to be allocated and initialized. As these can be both relatively large, you may not want to store these @@ -2470,6 +3446,7 @@ both "png_ptr"; you can call them anything you like, such as png_structp png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, user_error_fn, user_warning_fn); + if (!png_ptr) return (ERROR); @@ -2477,7 +3454,7 @@ both "png_ptr"; you can call them anything you like, such as if (!info_ptr) { png_destroy_write_struct(&png_ptr, - (png_infopp)NULL); + (png_infopp)NULL); return (ERROR); } @@ -2503,7 +3480,7 @@ section below for more information on the libpng error handling. if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_write_struct(&png_ptr, &info_ptr); + png_destroy_write_struct(&png_ptr, &info_ptr); fclose(fp); return (ERROR); } @@ -2542,7 +3519,7 @@ called after each row has been written, which you can use to control a progress meter or the like. It's demonstrated in pngtest.c. You must supply a function - void write_row_callback(png_ptr, png_uint_32 row, + void write_row_callback(png_structp png_ptr, png_uint_32 row, int pass); { /* put your code here */ @@ -2554,6 +3531,20 @@ To inform libpng about your function, use png_set_write_status_fn(png_ptr, write_row_callback); +When this function is called the row has already been completely processed and +it has also been written out. The 'row' and 'pass' refer to the next row to be +handled. For the +non-interlaced case the row that was just handled is simply one less than the +passed in row number, and pass will always be 0. For the interlaced case the +same applies unless the row value is 0, in which case the row just handled was +the last one from one of the preceding passes. Because interlacing may skip a +pass you cannot be sure that the preceding pass is just 'pass-1', if you really +need to know what the last pass is record (row,pass) from the callback and use +the last recorded value each time. + +As with the user transform you can find the output row using the +PNG_ROW_FROM_PASS_ROW macro. + You now have the option of modifying how the compression library will run. The following functions are mainly for testing, but may be useful in some cases, like if you need to write PNG files extremely fast and @@ -2573,7 +3564,8 @@ filter types. /* turn on or off filtering, and/or choose specific filters. You can use either a single PNG_FILTER_VALUE_NAME or the bitwise OR of one - or more PNG_FILTER_NAME masks. */ + or more PNG_FILTER_NAME masks. + */ png_set_filter(png_ptr, 0, PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE | PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB | @@ -2582,11 +3574,10 @@ filter types. PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH| PNG_ALL_FILTERS); -If an application -wants to start and stop using particular filters during compression, -it should start out with all of the filters (to ensure that the previous -row of pixels will be stored in case it's needed later), and then add -and remove them after the start of compression. +If an application wants to start and stop using particular filters during +compression, it should start out with all of the filters (to ensure that +the previous row of pixels will be stored in case it's needed later), +and then add and remove them after the start of compression. If you are writing a PNG datastream that is to be embedded in a MNG datastream, the second parameter can be either 0 or 64. @@ -2598,11 +3589,13 @@ which changes how much time zlib spends on trying to compress the image data. See the Compression Library (zlib.h and algorithm.txt, distributed with zlib) for details on the compression levels. - /* set the zlib compression level */ + #include zlib.h + + /* Set the zlib compression level */ png_set_compression_level(png_ptr, Z_BEST_COMPRESSION); - /* set other zlib parameters */ + /* Set other zlib parameters for compressing IDAT */ png_set_compression_mem_level(png_ptr, 8); png_set_compression_strategy(png_ptr, Z_DEFAULT_STRATEGY); @@ -2610,7 +3603,15 @@ with zlib) for details on the compression levels. png_set_compression_method(png_ptr, 8); png_set_compression_buffer_size(png_ptr, 8192) -extern PNG_EXPORT(void,png_set_zbuf_size) + /* Set zlib parameters for text compression + * If you don't call these, the parameters + * fall back on those defined for IDAT chunks + */ + png_set_text_compression_mem_level(png_ptr, 8); + png_set_text_compression_strategy(png_ptr, + Z_DEFAULT_STRATEGY); + png_set_text_compression_window_bits(png_ptr, 15); + png_set_text_compression_method(png_ptr, 8); .SS Setting the contents of info for output @@ -2630,16 +3631,20 @@ Some of the more important parts of the png_info are: png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, color_type, interlace_type, compression_type, filter_method) + width - holds the width of the image in pixels (up to 2^31). + height - holds the height of the image in pixels (up to 2^31). + bit_depth - holds the bit depth of one of the image channels. (valid values are 1, 2, 4, 8, 16 and depend also on the color_type. See also significant bits (sBIT) below). + color_type - describes which color/alpha channels are present. PNG_COLOR_TYPE_GRAY @@ -2659,8 +3664,10 @@ Some of the more important parts of the png_info are: interlace_type - PNG_INTERLACE_NONE or PNG_INTERLACE_ADAM7 + compression_type - (must be PNG_COMPRESSION_TYPE_DEFAULT) + filter_method - (must be PNG_FILTER_TYPE_DEFAULT or, if you are writing a PNG to be embedded in a MNG datastream, @@ -2678,15 +3685,44 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_PLTE(png_ptr, info_ptr, palette, num_palette); + palette - the palette for the file (array of png_color) num_palette - number of entries in the palette - png_set_gAMA(png_ptr, info_ptr, gamma); - gamma - the gamma the image was created - at (PNG_INFO_gAMA) + png_set_gAMA(png_ptr, info_ptr, file_gamma); + png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); + + file_gamma - the gamma at which the image was + created (PNG_INFO_gAMA) + + int_file_gamma - 100,000 times the gamma at which + the image was created + + png_set_cHRM(png_ptr, info_ptr, white_x, white_y, red_x, red_y, + green_x, green_y, blue_x, blue_y) + png_set_cHRM_XYZ(png_ptr, info_ptr, red_X, red_Y, red_Z, green_X, + green_Y, green_Z, blue_X, blue_Y, blue_Z) + png_set_cHRM_fixed(png_ptr, info_ptr, int_white_x, int_white_y, + int_red_x, int_red_y, int_green_x, int_green_y, + int_blue_x, int_blue_y) + png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, int_red_X, int_red_Y, + int_red_Z, int_green_X, int_green_Y, int_green_Z, + int_blue_X, int_blue_Y, int_blue_Z) + + {white,red,green,blue}_{x,y} + A color space encoding specified using the chromaticities + of the end points and the white point. + + {red,green,blue}_{X,Y,Z} + A color space encoding specified using the encoding end + points - the CIE tristimulus specification of the intended + color of the red, green and blue channels in the PNG RGB + data. The white point is simply the sum of the three end + points. png_set_sRGB(png_ptr, info_ptr, srgb_intent); + srgb_intent - the rendering intent (PNG_INFO_sRGB) The presence of the sRGB chunk means that the pixel @@ -2706,6 +3742,7 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, srgb_intent); + srgb_intent - the rendering intent (PNG_INFO_sRGB) The presence of the sRGB chunk means that the pixel @@ -2716,17 +3753,22 @@ width, height, bit_depth, and color_type must be the same in each call. written. png_set_iCCP(png_ptr, info_ptr, name, compression_type, - profile, proflen); - name - The profile name. - compression - The compression type; always - PNG_COMPRESSION_TYPE_BASE for PNG 1.0. - You may give NULL to this argument to - ignore it. - profile - International Color Consortium color - profile data. May contain NULs. - proflen - length of profile data in bytes. + profile, proflen); + + name - The profile name. + + compression_type - The compression type; always + PNG_COMPRESSION_TYPE_BASE for PNG 1.0. + You may give NULL to this argument to + ignore it. + + profile - International Color Consortium color + profile data. May contain NULs. + + proflen - length of profile data in bytes. png_set_sBIT(png_ptr, info_ptr, sig_bit); + sig_bit - the number of significant bits for (PNG_INFO_sBIT) each of the gray, red, green, and blue channels, whichever are @@ -2735,30 +3777,38 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_tRNS(png_ptr, info_ptr, trans_alpha, num_trans, trans_color); + trans_alpha - array of alpha (transparency) entries for palette (PNG_INFO_tRNS) + + num_trans - number of transparent entries + (PNG_INFO_tRNS) + trans_color - graylevel or color sample values (in order red, green, blue) of the single transparent color for non-paletted images (PNG_INFO_tRNS) - num_trans - number of transparent entries - (PNG_INFO_tRNS) png_set_hIST(png_ptr, info_ptr, hist); - (PNG_INFO_hIST) + hist - histogram of palette (array of - png_uint_16) + png_uint_16) (PNG_INFO_hIST) png_set_tIME(png_ptr, info_ptr, mod_time); + mod_time - time image was last modified (PNG_VALID_tIME) png_set_bKGD(png_ptr, info_ptr, background); - background - background color (PNG_VALID_bKGD) + + background - background color (of type + png_color_16p) (PNG_VALID_bKGD) png_set_text(png_ptr, info_ptr, text_ptr, num_text); + text_ptr - array of png_text holding image comments + text_ptr[i].compression - type of compression used on "text" PNG_TEXT_COMPRESSION_NONE PNG_TEXT_COMPRESSION_zTXt @@ -2779,11 +3829,14 @@ width, height, bit_depth, and color_type must be the same in each call. Note that the itxt_length, lang, and lang_key members of the text_ptr structure only exist when the library is built with iTXt chunk support. + Prior to libpng-1.4.0 the library was built by default + without iTXt support. num_text - number of comments png_set_sPLT(png_ptr, info_ptr, &palette_ptr, num_spalettes); + palette_ptr - array of png_sPLT_struct structures to be added to the list of palettes in the info structure. @@ -2792,35 +3845,49 @@ width, height, bit_depth, and color_type must be the same in each call. png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type); + offset_x - positive offset from the left edge of the screen + offset_y - positive offset from the top edge of the screen + unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER png_set_pHYs(png_ptr, info_ptr, res_x, res_y, unit_type); + res_x - pixels/unit physical resolution in x direction + res_y - pixels/unit physical resolution in y direction + unit_type - PNG_RESOLUTION_UNKNOWN, PNG_RESOLUTION_METER png_set_sCAL(png_ptr, info_ptr, unit, width, height) + unit - physical scale units (an integer) + width - width of a pixel in physical scale units + height - height of a pixel in physical scale units (width and height are doubles) png_set_sCAL_s(png_ptr, info_ptr, unit, width, height) + unit - physical scale units (an integer) + width - width of a pixel in physical scale units + expressed as a string + height - height of a pixel in physical scale units (width and height are strings like "2.54") png_set_unknown_chunks(png_ptr, info_ptr, &unknowns, num_unknowns) + unknowns - array of png_unknown_chunk structures holding unknown chunks unknowns[i].name - name of unknown chunk @@ -2855,25 +3922,34 @@ Because tEXt and zTXt chunks don't have a language field, if you specify PNG_TEXT_COMPRESSION_NONE or PNG_TEXT_COMPRESSION_zTXt any language code or translated keyword will not be written out. -Until text gets around 1000 bytes, it is not worth compressing it. +Until text gets around a few hundred bytes, it is not worth compressing it. After the text has been written out to the file, the compression type is set to PNG_TEXT_COMPRESSION_NONE_WR or PNG_TEXT_COMPRESSION_zTXt_WR, so that it isn't written out again at the end (in case you are calling -png_write_end() with the same struct. +png_write_end() with the same struct). The keywords that are given in the PNG Specification are: Title Short (one line) title or caption for image + Author Name of image's creator + Description Description of image (possibly long) + Copyright Copyright notice + Creation Time Time of original image creation (usually RFC 1123 format, see below) + Software Software used to create the image + Disclaimer Legal disclaimer + Warning Warning of nature of content + Source Device used to create the image + Comment Miscellaneous comment; conversion from other image format @@ -3043,17 +4119,19 @@ file so that decoders can recover the original data if desired. /* Set the true bit depth of the image data */ if (color_type & PNG_COLOR_MASK_COLOR) { - sig_bit.red = true_bit_depth; - sig_bit.green = true_bit_depth; - sig_bit.blue = true_bit_depth; + sig_bit.red = true_bit_depth; + sig_bit.green = true_bit_depth; + sig_bit.blue = true_bit_depth; } + else { - sig_bit.gray = true_bit_depth; + sig_bit.gray = true_bit_depth; } + if (color_type & PNG_COLOR_MASK_ALPHA) { - sig_bit.alpha = true_bit_depth; + sig_bit.alpha = true_bit_depth; } png_set_sBIT(png_ptr, info_ptr, &sig_bit); @@ -3065,7 +4143,7 @@ is required by PNG. png_set_shift(png_ptr, &sig_bit); -PNG files store 16 bit pixels in network byte order (big-endian, +PNG files store 16-bit pixels in network byte order (big-endian, ie. most significant bits first). This code would be used if they are supplied the other way (little-endian, i.e. least significant bits first, the way PCs store them): @@ -3099,11 +4177,24 @@ with You must supply the function - void write_transform_fn(png_ptr ptr, row_info_ptr + void write_transform_fn(png_structp png_ptr, png_row_infop row_info, png_bytep data) See pngtest.c for a working example. Your function will be called -before any of the other transformations are processed. +before any of the other transformations are processed. If supported +libpng also supplies an information routine that may be called from +your callback: + + png_get_current_row_number(png_ptr); + png_get_current_pass_number(png_ptr); + +This returns the current row passed to the transform. With interlaced +images the value returned is the row in the input sub-image image. Use +PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to +find the output pixel (x,y) given an interlaced sub-image pixel (row,col,pass). + +The discussion of interlace handling above contains more information on how to +use these values. You can also set up a pointer to a user structure for use by your callback function. @@ -3185,25 +4276,39 @@ for details of which pixels to write when. If you don't want libpng to handle the interlacing details, just use png_set_interlace_handling() and call png_write_rows() the -correct number of times to write all seven sub-images. +correct number of times to write all the sub-images +(png_set_interlace_handling() returns the number of sub-images.) If you want libpng to build the sub-images, call this before you start writing any rows: - number_of_passes = - png_set_interlace_handling(png_ptr); + number_of_passes = png_set_interlace_handling(png_ptr); This will return the number of passes needed. Currently, this is seven, but may change if another interlace type is added. Then write the complete image number_of_passes times. - png_write_rows(png_ptr, row_pointers, - number_of_rows); + png_write_rows(png_ptr, row_pointers, number_of_rows); + +Think carefully before you write an interlaced image. Typically code that +reads such images reads all the image data into memory, uncompressed, before +doing any processing. Only code that can display an image on the fly can +take advantage of the interlacing and even then the image has to be exactly +the correct size for the output device, because scaling an image requires +adjacent pixels and these are not available until all the passes have been +read. -As some of these rows are not used, and thus return immediately, you may -want to read about interlacing in the PNG specification, and only update -the rows that are actually used. +If you do write an interlaced image you will hardly ever need to handle +the interlacing yourself. Call png_set_interlace_handling() and use the +approach described above. + +The only time it is conceivable that you will really need to write an +interlaced image pass-by-pass is when you have read one pass by pass and +made some pixel-by-pixel transformation to it, as described in the read +code above. In this case use the PNG_PASS_ROWS and PNG_PASS_COLS macros +to determine the size of each sub-image in turn and simply write the rows +you obtained from the read code. .SS Finishing a sequential write @@ -3222,6 +4327,7 @@ It is also possible to individually free the info_ptr members that point to libpng-allocated storage with the following function: png_free_data(png_ptr, info_ptr, mask, seq) + mask - identifies data to be freed, a mask containing the bitwise OR of one or more of @@ -3231,6 +4337,7 @@ point to libpng-allocated storage with the following function: PNG_FREE_SCAL, PNG_FREE_SPLT, PNG_FREE_TEXT, PNG_FREE_UNKN, or simply PNG_FREE_ALL + seq - sequence number of item to be freed (-1 for all items) @@ -3252,19 +4359,22 @@ or so that it will free data that was allocated by the user with png_malloc() or png_zalloc() and passed in via a png_set_*() function, with png_data_freer(png_ptr, info_ptr, freer, mask) - mask - which data elements are affected - same choices as in png_free_data() + freer - one of PNG_DESTROY_WILL_FREE_DATA PNG_SET_WILL_FREE_DATA PNG_USER_WILL_FREE_DATA + mask - which data elements are affected + same choices as in png_free_data() + For example, to transfer responsibility for some data from a read structure to a write structure, you could use png_data_freer(read_ptr, read_info_ptr, PNG_USER_WILL_FREE_DATA, PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST) + png_data_freer(write_ptr, write_info_ptr, PNG_DESTROY_WILL_FREE_DATA, PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST) @@ -3311,9 +4421,11 @@ these functions, call the appropriate png_set_*_fn() function. Memory allocation is done through the functions png_malloc(), png_calloc(), and png_free(). These currently just call the standard C functions. -png_calloc() calls png_malloc() and then png_memset() to clear the newly -allocated memory to zero. If your pointers can't access more then 64K -at a time, you will want to set MAXSEG_64K in zlib.h. Since it is +png_calloc() calls png_malloc() and then clears the newly +allocated memory to zero. There is limited support for certain systems +with segmented memory architectures and the types of pointers declared by +png.h match this; you will have to use appropriate pointers in your +application. Since it is unlikely that the method of handling memory allocation on a platform will change between applications, these functions must be modified in the library at compile time. If you prefer to use a different method @@ -3328,6 +4440,7 @@ Your replacement memory functions must have prototypes as follows: png_voidp malloc_fn(png_structp png_ptr, png_alloc_size_t size); + void free_fn(png_structp png_ptr, png_voidp ptr); Your malloc_fn() must return NULL in case of failure. The png_malloc() @@ -3360,8 +4473,10 @@ The replacement I/O functions must have prototypes as follows: void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length); + void user_write_data(png_structp png_ptr, png_bytep data, png_size_t length); + void user_flush_data(png_structp png_ptr); The user_read_data() function is responsible for detecting and @@ -3406,6 +4521,7 @@ parameters as follows: void user_error_fn(png_structp png_ptr, png_const_charp error_msg); + void user_warning_fn(png_structp png_ptr, png_const_charp warning_msg); @@ -3416,7 +4532,8 @@ However, there are some uncertainties about the status of local variables after a longjmp, so the user may want to be careful about doing anything after setjmp returns non-zero besides returning itself. Consult your compiler documentation for more details. For an alternative approach, you -may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net). +may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net), +which is illustrated in pngvalid.c and in contrib/visupng. .SS Custom chunks @@ -3434,8 +4551,11 @@ and look at how other chunks were designed, so you can do things similarly. Second, check out the sections of libpng that read and write chunks. Try to find a chunk that is similar to yours and use it as a template. More details can be found in the comments inside -the code. It is best to handle unknown chunks in a generic method, -via callback functions, instead of by modifying libpng functions. +the code. It is best to handle private or unknown chunks in a generic method, +via callback functions, instead of by modifying libpng functions. This +is illustrated in pngtest.c, which uses a callback function to handle a +private "vpAg" chunk and the new "sTER" chunk, which are both unknown to +libpng. If you wish to write your own transformation for the data, look through the part of the code that does the transformations, and check out some of @@ -3443,7 +4563,7 @@ the simpler ones to get an idea of how they work. Try to find a similar transformation to the one you want to add and copy off of it. More details can be found in the comments inside the code itself. -.SS Configuring for 16 bit platforms +.SS Configuring for 16-bit platforms You will want to look into zconf.h to tell zlib (and thus libpng) that it cannot allocate more then 64K at a time. Even if you can, the memory @@ -3463,8 +4583,8 @@ defined, and FAR gets defined to far in pngconf.h, and you should be all set. Everything in the library (except for zlib's structure) is expecting far data. You must use the typedefs with the p or pp on the end for pointers (or at least look at them and be careful). Make -note that the rows of data are defined as png_bytepp, which is an -unsigned char far * far *. +note that the rows of data are defined as png_bytepp, which is +an "unsigned char far * far *". .SS Configuring for gui/windowing platforms: @@ -3482,7 +4602,11 @@ or delete an include, this is the place to do it. The includes that are not needed outside libpng are placed in pngpriv.h, which is only used by the routines inside libpng itself. The files in libpng proper only include pngpriv.h and png.h, which -in turn includes pngconf.h. +%14%in turn includes pngconf.h. +in turn includes pngconf.h and, as of libpng-1.5.0, pnglibconf.h. +As of libpng-1.5.0, pngpriv.h also includes three other private header +files, pngstruct.h, pnginfo.h, and pngdebug.h, which contain material +that previously appeared in the public headers. .SS Configuring zlib: @@ -3498,6 +4622,7 @@ specify no compression (Z_NO_COMPRESSION = 0), but this would create files larger than just storing the raw bitmap. You can specify the compression level by calling: + #include zlib.h png_set_compression_level(png_ptr, level); Another useful one is to reduce the memory level used by the library. @@ -3508,19 +4633,43 @@ other things, lower levels will result in sections of incompressible data being emitted in smaller stored blocks, with a correspondingly larger relative overhead of up to 15% in the worst case. + #include zlib.h png_set_compression_mem_level(png_ptr, level); The other functions are for configuring zlib. They are not recommended for normal use and may result in writing an invalid PNG file. See zlib.h for more information on what these mean. + #include zlib.h png_set_compression_strategy(png_ptr, strategy); + png_set_compression_window_bits(png_ptr, window_bits); + png_set_compression_method(png_ptr, method); + png_set_compression_buffer_size(png_ptr, size); +As of libpng version 1.5.4, additional APIs became +available to set these separately for non-IDAT +compressed chunks such as zTXt, iTXt, and iCCP: + + #include zlib.h + #if PNG_LIBPNG_VER <= 10504 + png_set_text_compression_level(png_ptr, level); + + png_set_text_compression_mem_level(png_ptr, level); + + png_set_text_compression_strategy(png_ptr, + strategy); + + png_set_text_compression_window_bits(png_ptr, + window_bits); + + png_set_text_compression_method(png_ptr, method); + #endif + .SS Controlling row filtering If you want to control whether libpng uses filtering or not, which @@ -3607,6 +4756,8 @@ before recompiling libpng and save yourself code and data space, or you can turn off individual capabilities with defines that begin with PNG_NO_. +In libpng-1.5.0 and later, the #define's are in pnglibconf.h instead. + You can also turn all of the transforms and ancillary chunk capabilities off en masse with compiler directives that define PNG_NO_READ[or WRITE]_TRANSFORMS, or PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS, @@ -3624,8 +4775,8 @@ capability, which you'll still have). All the reading and writing specific code are in separate files, so the linker should only grab the files it needs. However, if you want to make sure, or if you are building a stand alone library, all the -reading files start with pngr and all the writing files start with -pngw. The files that don't match either (like png.c, pngtrans.c, etc.) +reading files start with "pngr" and all the writing files start with "pngw". +The files that don't match either (like png.c, pngtrans.c, etc.) are used for both reading and writing, and always need to be included. The progressive reader is in pngpread.c @@ -3659,8 +4810,8 @@ according to printf-style formatting directives. For example, is expanded to - if(PNG_DEBUG > 2) - fprintf(PNG_DEBUG_FILE, "foo=%d\n", foo); + if (PNG_DEBUG > 2) + fprintf(PNG_DEBUG_FILE, "foo=%d\n", foo); When PNG_DEBUG is defined but is zero, the macros aren't defined, but you can still use PNG_DEBUG to control your own debugging: @@ -3681,11 +4832,13 @@ Libpng can support some of these extensions. To enable them, use the png_permit_mng_features() function: feature_set = png_permit_mng_features(png_ptr, mask) + mask is a png_uint_32 containing the bitwise OR of the features you want to enable. These include PNG_FLAG_MNG_EMPTY_PLTE PNG_FLAG_MNG_FILTER_64 PNG_ALL_MNG_FEATURES + feature_set is a png_uint_32 that is the bitwise AND of your mask with the set of MNG features that is supported by the version of libpng that you are using. @@ -3710,7 +4863,7 @@ still alive and well, but they have moved on to other things. The old libpng functions png_read_init(), png_write_init(), png_info_init(), png_read_destroy(), and png_write_destroy() have been moved to PNG_INTERNAL in version 0.95 to discourage their use. These -functions will be removed from libpng version 2.0.0. +functions will be removed from libpng version 1.4.0. The preferred method of creating and initializing the libpng structures is via the png_create_read_struct(), png_create_write_struct(), and @@ -3742,6 +4895,9 @@ The number libpng_vn is constructed from the major version, minor version with leading zero, and release number with leading zero, (e.g., libpng_vn for version 1.0.7 is 10007). +Note that this function does not take a png_ptr, so you can call it +before you've created one. + You can also check which version of png.h you used when compiling your application: @@ -3899,13 +5055,19 @@ png_get_mmx_bitdepth_threshold(), png_get_mmx_rowbytes_threshold(), png_set_asm_flags(), and png_mmx_supported() We removed the obsolete png_check_sig(), png_memcpy_check(), and -png_memset_check() functions. Instead use !png_sig_cmp(), png_memcpy(), -and png_memset(), respectively. +png_memset_check() functions. Instead use !png_sig_cmp(), memcpy(), +and memset(), respectively. The function png_set_gray_1_2_4_to_8() was removed. It has been deprecated since libpng-1.0.18 and 1.2.9, when it was replaced with png_set_expand_gray_1_2_4_to_8() because the former function also -expanded palette images. +expanded any tRNS chunk to an alpha channel. + +Macros for png_get_uint_16, png_get_uint_32, and png_get_int_32 +were added and are used by default instead of the corresponding +functions. Unfortunately, +from libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the +function) incorrectly returned a value of type png_uint_32. We changed the prototype for png_malloc() from png_malloc(png_structp png_ptr, png_uint_32 size) @@ -3915,7 +5077,7 @@ to This also applies to the prototype for the user replacement malloc_fn(). The png_calloc() function was added and is used in place of -of "png_malloc(); png_memset();" except in the case in png_read_png() +of "png_malloc(); memset();" except in the case in png_read_png() where the array consists of pointers; in this case a "for" loop is used after the png_malloc() to set the pointers to NULL, to give robust. behavior in case the application runs out of memory part-way through @@ -3934,17 +5096,308 @@ The png_zalloc() function no longer zeroes out the memory that it allocates. Support for dithering was disabled by default in libpng-1.4.0, because -been well tested and doesn't actually "dither". The code was not +it has not been well tested and doesn't actually "dither". +The code was not removed, however, and could be enabled by building libpng with PNG_READ_DITHER_SUPPORTED defined. In libpng-1.4.2, this support was reenabled, but the function was renamed png_set_quantize() to reflect more accurately what it actually does. At the same time, the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros were also renamed to -PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS. +PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS, and PNG_READ_DITHER_SUPPORTED +was renamed to PNG_READ_QUANTIZE_SUPPORTED. We removed the trailing '.' from the warning and error messages. -.SH X. Detecting libpng +.SH X. Changes to Libpng from version 1.4.x to 1.5.x + +From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the +function) incorrectly returned a value of type png_uint_32. + +A. Changes that affect users of libpng + +There are no substantial API changes between the non-deprecated parts of +the 1.4.5 API and the 1.5.0 API, however the ability to directly access +the main libpng control structures, png_struct and png_info, deprecated +in earlier versions of libpng, has been completely removed from +libpng 1.5. + +We no longer include zlib.h in png.h. Applications that need access +to information in zlib.h will need to add the '#include "zlib.h"' +directive. It does not matter whether it is placed prior to or after +the '"#include png.h"' directive. + +We moved the png_strcpy(), png_strncpy(), png_strlen(), png_memcpy(), +png_memcmp(), png_sprintf, and png_memcpy() macros into a private +header file (pngpriv.h) that is not accessible to applications. + +In png_get_iCCP, the type of "profile" was changed from png_charpp +to png_bytepp, and in png_set_iCCP, from png_charp to png_const_bytep. + +There are changes of form in png.h, including new and changed macros to +declare parts of the API. Some API functions with arguments that are +pointers to data not modified within the function have been corrected to +declare these arguments with PNG_CONST. + +Much of the internal use of C macros to control the library build has also +changed and some of this is visible in the exported header files, in +particular the use of macros to control data and API elements visible +during application compilation may require significant revision to +application code. (It is extremely rare for an application to do this.) + +Any program that compiled against libpng 1.4 and did not use deprecated +features or access internal library structures should compile and work +against libpng 1.5, except for the change in the prototype for +png_get_iCCP() and png_set_iCCP() API functions mentioned above. + +libpng 1.5.0 adds PNG_ PASS macros to help in the reading and writing of +interlaced images. The macros return the number of rows and columns in +each pass and information that can be used to de-interlace and (if +absolutely necessary) interlace an image. + +libpng 1.5.0 adds an API png_longjmp(png_ptr, value). This API calls +the application-provided png_longjmp_ptr on the internal, but application +initialized, longjmp buffer. It is provided as a convenience to avoid +the need to use the png_jmpbuf macro, which had the unnecessary side +effect of resetting the internal png_longjmp_ptr value. + +libpng 1.5.0 includes a complete fixed point API. By default this is +present along with the corresponding floating point API. In general the +fixed point API is faster and smaller than the floating point one because +the PNG file format used fixed point, not floating point. This applies +even if the library uses floating point in internal calculations. A new +macro, PNG_FLOATING_ARITHMETIC_SUPPORTED, reveals whether the library +uses floating point arithmetic (the default) or fixed point arithmetic +internally for performance critical calculations such as gamma correction. +In some cases, the gamma calculations may produce slightly different +results. This has changed the results in png_rgb_to_gray and in alpha +composition (png_set_background for example). This applies even if the +original image was already linear (gamma == 1.0) and, therefore, it is +not necessary to linearize the image. This is because libpng has *not* +been changed to optimize that case correctly, yet. + +Fixed point support for the sCAL chunk comes with an important caveat; +the sCAL specification uses a decimal encoding of floating point values +and the accuracy of PNG fixed point values is insufficient for +representation of these values. Consequently a "string" API +(png_get_sCAL_s and png_set_sCAL_s) is the only reliable way of reading +arbitrary sCAL chunks in the absence of either the floating point API or +internal floating point calculations. + +Applications no longer need to include the optional distribution header +file pngusr.h or define the corresponding macros during application +build in order to see the correct variant of the libpng API. From 1.5.0 +application code can check for the corresponding _SUPPORTED macro: + +#ifdef PNG_INCH_CONVERSIONS_SUPPORTED + /* code that uses the inch conversion APIs. */ +#endif + +This macro will only be defined if the inch conversion functions have been +compiled into libpng. The full set of macros, and whether or not support +has been compiled in, are available in the header file pnglibconf.h. +This header file is specific to the libpng build. Notice that prior to +1.5.0 the _SUPPORTED macros would always have the default definition unless +reset by pngusr.h or by explicit settings on the compiler command line. +These settings may produce compiler warnings or errors in 1.5.0 because +of macro redefinition. + +From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the +function) incorrectly returned a value of type png_uint_32. libpng 1.5.0 +is consistent with the implementation in 1.4.5 and 1.2.x (where the macro +did not exist.) + +Applications can now choose whether to use these macros or to call the +corresponding function by defining PNG_USE_READ_MACROS or +PNG_NO_USE_READ_MACROS before including png.h. Notice that this is +only supported from 1.5.0 -defining PNG_NO_USE_READ_MACROS prior to 1.5.0 +will lead to a link failure. + +Prior to libpng-1.5.4, the zlib compressor used the same set of parameters +when compressing the IDAT data and textual data such as zTXt and iCCP. +In libpng-1.5.4 we reinitialized the zlib stream for each type of data. +We added five png_set_text_*() functions for setting the parameters to +use with textual data. + +Prior to libpng-1.5.4, the PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED +option was off by default, and slightly inaccurate scaling occurred. +This option can no longer be turned off, and the choice of accurate +or inaccurate 16-to-8 scaling is by using the new png_set_scale_16_to_8() +API for accurate scaling or the old png_set_strip_16_to_8() API for simple +chopping. + +Prior to libpng-1.5.4, the png_set_user_limits() function could only be +used to reduce the width and height limits from the value of +PNG_USER_WIDTH_MAX and PNG_USER_HEIGHT_MAX, although this document said +that it could be used to override them. Now this function will reduce or +increase the limits. + +B. Changes to the build and configuration of libpng + +Details of internal changes to the library code can be found in the CHANGES +file and in the GIT repository logs. These will be of no concern to the vast +majority of library users or builders, however the few who configure libpng +to a non-default feature set may need to change how this is done. + +There should be no need for library builders to alter build scripts if +these use the distributed build support - configure or the makefiles - +however users of the makefiles may care to update their build scripts +to build pnglibconf.h where the corresponding makefile does not do so. + +Building libpng with a non-default configuration has changed completely. +The old method using pngusr.h should still work correctly even though the +way pngusr.h is used in the build has been changed; however, library +builders will probably want to examine the changes to take advantage of +new capabilities and to simplify their build system. + +B.1 Specific changes to library configuration capabilities + +The library now supports a complete fixed point implementation and can +thus be used on systems that have no floating point support or very +limited or slow support. Previously gamma correction, an essential part +of complete PNG support, required reasonably fast floating point. + +As part of this the choice of internal implementation has been made +independent of the choice of fixed versus floating point APIs and all the +missing fixed point APIs have been implemented. + +The exact mechanism used to control attributes of API functions has +changed. A single set of operating system independent macro definitions +is used and operating system specific directives are defined in +pnglibconf.h + +As part of this the mechanism used to choose procedure call standards on +those systems that allow a choice has been changed. At present this only +affects certain Microsoft (DOS, Windows) and IBM (OS/2) operating systems +running on Intel processors. As before, PNGAPI is defined where required +to control the exported API functions; however, two new macros, PNGCBAPI +and PNGCAPI, are used instead for callback functions (PNGCBAPI) and +(PNGCAPI) for functions that must match a C library prototype (currently +only png_longjmp_ptr, which must match the C longjmp function.) The new +approach is documented in pngconf.h + +Despite these changes, libpng 1.5.0 only supports the native C function +calling standard on those platforms tested so far (__cdecl on Microsoft +Windows). This is because the support requirements for alternative +calling conventions seem to no longer exist. Developers who find it +necessary to set PNG_API_RULE to 1 should advise the mailing list +(png-mng-implement) of this and library builders who use Openwatcom and +therefore set PNG_API_RULE to 2 should also contact the mailing list. + +A new test program, pngvalid, is provided in addition to pngtest. +pngvalid validates the arithmetic accuracy of the gamma correction +calculations and includes a number of validations of the file format. +A subset of the full range of tests is run when "make check" is done +(in the 'configure' build.) pngvalid also allows total allocated memory +usage to be evaluated and performs additional memory overwrite validation. + +Many changes to individual feature macros have been made. The following +are the changes most likely to be noticed by library builders who +configure libpng: + +1) All feature macros now have consistent naming: + +#define PNG_NO_feature turns the feature off +#define PNG_feature_SUPPORTED turns the feature on + +pnglibconf.h contains one line for each feature macro which is either: + +#define PNG_feature_SUPPORTED + +if the feature is supported or: + +/*#undef PNG_feature_SUPPORTED*/ + +if it is not. Library code consistently checks for the 'SUPPORTED' macro. +It does not, and libpng applications should not, check for the 'NO' macro +which will not normally be defined even if the feature is not supported. +The 'NO' macros are only used internally for setting or not setting the +corresponding 'SUPPORTED' macros. + +Compatibility with the old names is provided as follows: + +PNG_INCH_CONVERSIONS turns on PNG_INCH_CONVERSIONS_SUPPORTED + +And the following definitions disable the corresponding feature: + +PNG_SETJMP_NOT_SUPPORTED disables SETJMP +PNG_READ_TRANSFORMS_NOT_SUPPORTED disables READ_TRANSFORMS +PNG_NO_READ_COMPOSITED_NODIV disables READ_COMPOSITE_NODIV +PNG_WRITE_TRANSFORMS_NOT_SUPPORTED disables WRITE_TRANSFORMS +PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED disables READ_ANCILLARY_CHUNKS +PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED disables WRITE_ANCILLARY_CHUNKS + +Library builders should remove use of the above, inconsistent, names. + +2) Warning and error message formatting was previously conditional on +the STDIO feature. The library has been changed to use the +CONSOLE_IO feature instead. This means that if CONSOLE_IO is disabled +the library no longer uses the printf(3) functions, even though the +default read/write implementations use (FILE) style stdio.h functions. + +3) Three feature macros now control the fixed/floating point decisions: + +PNG_FLOATING_POINT_SUPPORTED enables the floating point APIs + +PNG_FIXED_POINT_SUPPORTED enables the fixed point APIs; however, in +practice these are normally required internally anyway (because the PNG +file format is fixed point), therefore in most cases PNG_NO_FIXED_POINT +merely stops the function from being exported. + +PNG_FLOATING_ARITHMETIC_SUPPORTED chooses between the internal floating +point implementation or the fixed point one. Typically the fixed point +implementation is larger and slower than the floating point implementation +on a system that supports floating point, however it may be faster on a +system which lacks floating point hardware and therefore uses a software +emulation. + +4) Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the +functions to read and write ints to be disabled independently of +PNG_USE_READ_MACROS, which allows libpng to be built with the functions +even though the default is to use the macros - this allows applications +to choose at app buildtime whether or not to use macros (previously +impossible because the functions weren't in the default build.) + +B.2 Changes to the configuration mechanism + +Prior to libpng-1.5.0 library builders who needed to configure libpng +had either to modify the exported pngconf.h header file to add system +specific configuration or had to write feature selection macros into +pngusr.h and cause this to be included into pngconf.h by defining +PNG_USER_CONFIG. The latter mechanism had the disadvantage that an +application built without PNG_USER_CONFIG defined would see the +unmodified, default, libpng API and thus would probably fail to link. + +These mechanisms still work in the configure build and in any makefile +build that builds pnglibconf.h, although the feature selection macros +have changed somewhat as described above. In 1.5.0, however, pngusr.h is +processed only once, when the exported header file pnglibconf.h is built. +pngconf.h no longer includes pngusr.h, therefore pngusr.h is ignored after the +build of pnglibconf.h and it is never included in an application build. + +The rarely used alternative of adding a list of feature macros to the +CFLAGS setting in the build also still works, however the macros will be +copied to pnglibconf.h and this may produce macro redefinition warnings +when the individual C files are compiled. + +All configuration now only works if pnglibconf.h is built from +scripts/pnglibconf.dfa. This requires the program awk. Brian Kernighan +(the original author of awk) maintains C source code of that awk and this +and all known later implementations (often called by subtly different +names - nawk and gawk for example) are adequate to build pnglibconf.h. +The Sun Microsystems (now Oracle) program 'awk' is an earlier version +and does not work; this may also apply to other systems that have a +functioning awk called 'nawk'. + +Configuration options are now documented in scripts/pnglibconf.dfa. This +file also includes dependency information that ensures a configuration is +consistent; that is, if a feature is switched off dependent features are +also removed. As a recommended alternative to using feature macros in +pngusr.h a system builder may also define equivalent options in pngusr.dfa +(or, indeed, any file) and add that to the configuration by setting +DFA_XTRA to the file name. The makefiles in contrib/pngminim illustrate +how to do this, and a case where pngusr.h is still required. + +.SH XI. Detecting libpng The png_get_io_ptr() function has been present since libpng-0.88, has never changed, and is unaffected by conditional compilation macros. It is the @@ -3953,7 +5406,7 @@ libpng version since 0.88. In an autoconf "configure.in" you could use AC_CHECK_LIB(png, png_get_io_ptr, ... -.SH XI. Source code repository +.SH XII. Source code repository Since about February 2009, version 1.2.34, libpng has been under "git" source control. The git repository was built from old libpng-x.y.z.tar.gz files @@ -3972,7 +5425,12 @@ the libpng bug tracker at http://libpng.sourceforge.net -.SH XII. Coding style +We also accept patches built from the tar or zip distributions, and +simple verbal discriptions of bug fixes, reported either to the +SourceForge bug tracker, to the png-mng-implement at lists.sf.net +mailing list, or directly to glennrp. + +.SH XIII. Coding style Our coding style is similar to the "Allman" style, with curly braces on separate lines: @@ -4029,7 +5487,7 @@ Functions and their curly braces are not indented, and exported functions are marked with PNGAPI: /* This is a public function that is visible to - * application programers. It does thus-and-so. + * application programmers. It does thus-and-so. */ void PNGAPI png_exported_function(png_ptr, png_info, foo) @@ -4057,12 +5515,13 @@ above the comment that says /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ -The names of all exported functions and variables begin -with "png_", and all publicly visible C preprocessor -macros begin with "PNG_". +To avoid polluting the global namespace, the names of all exported +functions and variables begin with "png_", and all publicly visible C +preprocessor macros begin with "PNG_". We request that applications that +use libpng *not* begin any of their own symbols with either of these strings. We put a space after each comma and after each semicolon -in "for" statments, and we put spaces before and after each +in "for" statements, and we put spaces before and after each C binary operator and after "for" or "while", and before "?". We don't put a space between a typecast and the expression being cast, nor do we put one between a function name and the @@ -4074,21 +5533,24 @@ left parenthesis that follows it: We prefer #ifdef and #ifndef to #if defined() and if !defined() when there is only one macro being tested. +We prefer to express integers that are used as bit masks in hex format, +with an even number of lower-case hex digits (e.g., 0x00, 0xff, 0x0100). + We do not use the TAB character for indentation in the C sources. Lines do not exceed 80 characters. Other rules can be inferred by inspecting the libpng source. -.SH XIII. Y2K Compliance in libpng +.SH XIV. Y2K Compliance in libpng -September 23, 2010 +November 3, 2011 Since the PNG Development group is an ad-hoc body, we can't make an official declaration. This is your unofficial assurance that libpng from version 0.71 and -upward through 1.4.4 are Y2K compliant. It is my belief that earlier +upward through 1.5.6 are Y2K compliant. It is my belief that earlier versions were also Y2K compliant. Libpng only has three year fields. One is a 2-byte unsigned integer that @@ -4264,16 +5726,32 @@ the first widely used release: 1.4.1beta01-03 14 10401 14.so.14.1[.0] 1.4.1rc01 14 10401 14.so.14.1[.0] 1.4.1beta04-12 14 10401 14.so.14.1[.0] - 1.4.1rc02-04 14 10401 14.so.14.1[.0] 1.4.1 14 10401 14.so.14.1[.0] - 1.4.2beta01 14 10402 14.so.14.2[.0] - 1.4.2rc02-06 14 10402 14.so.14.2[.0] 1.4.2 14 10402 14.so.14.2[.0] - 1.4.3beta01-05 14 10403 14.so.14.3[.0] - 1.4.3rc01-03 14 10403 14.so.14.3[.0] 1.4.3 14 10403 14.so.14.3[.0] - 1.4.4beta01-08 14 10404 14.so.14.4[.0] - 1.4.4rc01-06 14 10404 14.so.14.4[.0] + 1.4.4 14 10404 14.so.14.4[.0] + 1.5.0beta01-58 15 10500 15.so.15.0[.0] + 1.5.0rc01-07 15 10500 15.so.15.0[.0] + 1.5.0 15 10500 15.so.15.0[.0] + 1.5.1beta01-11 15 10501 15.so.15.1[.0] + 1.5.1rc01-02 15 10501 15.so.15.1[.0] + 1.5.1 15 10501 15.so.15.1[.0] + 1.5.2beta01-03 15 10502 15.so.15.2[.0] + 1.5.2rc01-03 15 10502 15.so.15.2[.0] + 1.5.2 15 10502 15.so.15.2[.0] + 1.5.3beta01-10 15 10503 15.so.15.3[.0] + 1.5.3rc01-02 15 10503 15.so.15.3[.0] + 1.5.3beta11 15 10503 15.so.15.3[.0] + 1.5.3 [omitted] + 1.5.4beta01-08 15 10504 15.so.15.4[.0] + 1.5.4rc01 15 10504 15.so.15.4[.0] + 1.5.4 15 10504 15.so.15.4[.0] + 1.5.5beta01-08 15 10505 15.so.15.5[.0] + 1.5.5rc01 15 10505 15.so.15.5[.0] + 1.5.5 15 10505 15.so.15.5[.0] + 1.5.6beta01-07 15 10506 15.so.15.6[.0] + 1.5.6rc01-03 15 10506 15.so.15.6[.0] + 1.5.6 15 10506 15.so.15.6[.0] Henceforth the source version will match the shared-library minor and patch numbers; the shared-library major version number will be @@ -4287,6 +5765,7 @@ release number plus "betaNN" or "rcN". .SH "SEE ALSO" .BR "png"(5), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5) + .LP .IR libpng : .IP @@ -4329,7 +5808,7 @@ possible without all of you. Thanks to Frank J. T. Wojcik for helping with the documentation. -Libpng version 1.4.4 - September 23, 2010: +Libpng version 1.5.6 - November 3, 2011: Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc. Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net). @@ -4352,7 +5831,7 @@ this sentence. This code is released under the libpng license. -libpng versions 1.2.6, August 15, 2004, through 1.4.4, September 23, 2010, are +libpng versions 1.2.6, August 15, 2004, through 1.5.6, November 3, 2011, are Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are distributed according to the same disclaimer and license as libpng-1.2.5 with the following individual added to the list of Contributing Authors @@ -4451,7 +5930,7 @@ certification mark of the Open Source Initiative. Glenn Randers-Pehrson glennrp at users.sourceforge.net -September 23, 2010 +November 3, 2011 .\" end of man page diff --git a/src/png/libpngpf.3 b/src/png/libpngpf.3 index 615bb1c038..9a299cb662 100644 --- a/src/png/libpngpf.3 +++ b/src/png/libpngpf.3 @@ -1,806 +1,26 @@ -.TH LIBPNGPF 3 "September 23, 2010" +.TH LIBPNGPF 3 "November 3, 2011" .SH NAME -libpng \- Portable Network Graphics (PNG) Reference Library 1.4.4 +libpng \- Portable Network Graphics (PNG) Reference Library 1.5.6 (private functions) .SH SYNOPSIS -\fB#include \fP - \fB#include \fI"pngpriv.h" \fI\fB -\fBvoid png_64bit_product (long \fP\fIv1\fP\fB, long \fP\fIv2\fP\fB, unsigned long \fI*hi_product, - -\fBunsigned long \fI*lo_product\fP\fB);\fP - -\fI\fB - -\fBvoid png_build_gamma_table (png_structp \fP\fIpng_ptr\fP\fB, png_byte \fIbit_depth\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_build_grayscale_palette (int \fP\fIbit_depth\fP\fB, png_colorp \fIpalette\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_calculate_crc (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIptr\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBint png_check_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_fixed_point \fP\fIint_white_x\fP\fB, png_fixed_point \fP\fIint_white_y\fP\fB, png_fixed_point \fP\fIint_red_x\fP\fB, png_fixed_point \fP\fIint_red_y\fP\fB, png_fixed_point \fP\fIint_green_x\fP\fB, png_fixed_point \fP\fIint_green_y\fP\fB, png_fixed_point \fP\fIint_blue_x\fP\fB, png_fixed_point \fIint_blue_y\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_check_chunk_name (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBpng_size_t png_check_keyword (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charpp \fInew_key\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_check_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIinterlace_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fIfilter_type\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fImask\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_correct_palette (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fInum_palette\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBint png_crc_error (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBint png_crc_finish (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIskip\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_crc_read (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuf\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBpng_voidp png_create_struct (int \fItype\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBpng_voidp png_create_struct_2 (int \fP\fItype\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_voidp \fImem_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBint png_debug(int \fP\fIlevel\fP\fB, png_const_charp \fImessage\fP\fB);\fP - -\fI\fB - -\fBint png_debug1(int \fP\fIlevel\fP\fB, png_const_charp \fP\fImessage\fP\fB, \fIp1\fP\fB);\fP - -\fI\fB - -\fBint png_debug2(int \fP\fIlevel\fP\fB, png_const_charp \fP\fImessage\fP\fB, \fP\fIp1\fP\fB, \fIp2\fP\fB);\fP - -\fI\fB - -\fBvoid png_decompress_chunk (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcomp_type\fP\fB, png_size_t \fP\fIchunklength\fP\fB, png_size_t \fP\fIprefix_length\fP\fB, png_size_t \fI*data_length\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_destroy_struct (png_voidp \fIstruct_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_destroy_struct_2 (png_voidp \fP\fIstruct_ptr\fP\fB, png_free_ptr \fP\fIfree_fn\fP\fB, png_voidp \fImem_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_background (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_16p \fP\fItrans_color\fP\fB, png_color_16p \fP\fIbackground\fP\fB, png_color_16p \fP\fIbackground_1\fP\fB, png_bytep \fP\fIgamma_table\fP\fB, png_bytep \fP\fIgamma_from_1\fP\fB, png_bytep \fP\fIgamma_to_1\fP\fB, png_uint_16pp \fP\fIgamma_16\fP\fB, png_uint_16pp \fP\fIgamma_16_from_1\fP\fB, png_uint_16pp \fP\fIgamma_16_to_1\fP\fB, int \fIgamma_shift\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_bgr (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_chop (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_expand (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_16p \fItrans_value\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_expand_palette (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_colorp \fP\fIpalette\fP\fB, png_bytep \fP\fItrans\fP\fB, int \fInum_trans\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_gamma (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIgamma_table\fP\fB, png_uint_16pp \fP\fIgamma_16_table\fP\fB, int \fIgamma_shift\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_gray_to_rgb (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_invert (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_pack (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fIbit_depth\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_packswap (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_quantize (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIpalette_lookup\fP\fB, png_bytep \fIquantize_lookup\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_read_filler (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, png_uint_32 \fIflags\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_read_interlace (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fP\fIpass\fP\fB, png_uint_32 \fItransformations\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_read_invert_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_read_swap_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBint png_do_rgb_to_gray (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_shift (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_8p \fIbit_depth\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_strip_filler (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fIflags\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_swap (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_unpack (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_unshift (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_8p \fIsig_bits\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_write_interlace (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fIpass\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_write_invert_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_write_swap_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_do_write_transformations (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid *png_far_to_near (png_structp png_ptr,png_voidp \fP\fIptr\fP\fB, int \fIcheck\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_flush (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP +\fBAs of libpng version \fP\fI1.5.1\fP\fB, this section is no longer \fP\fImaintained\fP\fB, now \fIthat -\fI\fB - -\fI\fB - -\fBvoid png_handle_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB +\fBthe private function prototypes are hidden in pngpriv.h and not \fIaccessible -\fBvoid png_handle_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP +\fBto applications. Look in pngpriv.h for the prototypes and a short \fIdescription -\fI\fB - -\fI\fB - -\fBvoid png_handle_IEND (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_iTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_handle_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_info_destroy (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_init_mmx_flags (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_init_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_process_IDAT_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_process_some_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_check_crc (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_crc_finish (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_crc_skip (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_fill_buffer (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_handle_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_handle_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_handle_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_have_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_have_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_have_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_process_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_read_chunk (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_read_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_read_IDAT (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_read_sig (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_read_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_read_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_restore_buffer (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_push_save_buffer (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_read_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_destroy (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_infop \fIend_info_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_filter_row (png_structp \fP\fIpng_ptr\fP\fB, png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIprev_row\fP\fB, int \fIfilter\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_read_finish_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_read_push_finish_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_read_start_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_read_transform_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_reset_crc (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBint png_set_text_2 (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fItext_ptr\fP\fB, int \fInum_text\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_cHRM (png_structp \fP\fIpng_ptr\fP\fB, double \fP\fIwhite_x\fP\fB, double \fP\fIwhite_y\fP\fB, double \fP\fIred_x\fP\fB, double \fP\fIred_y\fP\fB, double \fP\fIgreen_x\fP\fB, double \fP\fIgreen_y\fP\fB, double \fP\fIblue_x\fP\fB, double \fIblue_y\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwhite_x\fP\fB, png_uint_32 \fP\fIwhite_y\fP\fB, png_uint_32 \fP\fIred_x\fP\fB, png_uint_32 \fP\fIred_y\fP\fB, png_uint_32 \fP\fIgreen_x\fP\fB, png_uint_32 \fP\fIgreen_y\fP\fB, png_uint_32 \fP\fIblue_x\fP\fB, png_uint_32 \fIblue_y\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_destroy (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_filtered_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIfiltered_row\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_find_filter (png_structp \fP\fIpng_ptr\fP\fB, png_row_infop \fIrow_info\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_finish_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_gAMA (png_structp \fP\fIpng_ptr\fP\fB, double \fIfile_gamma\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIint_file_gamma\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_uint_16p \fP\fIhist\fP\fB, int \fInum_hist\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_charp \fP\fIprofile\fP\fB, int \fIproflen\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_IDAT (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_IEND (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fP\fIfilter_type\fP\fB, int \fIinterlace_type\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_iTXt (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcompression\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fIlang\fP\fB, png_charp \fP\fItranslated_key\fP\fB, png_charp \fItext\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIx_offset\fP\fB, png_uint_32 \fP\fIy_offset\fP\fB, int \fIunit_type\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIpurpose\fP\fB, png_int_32 \fP\fIX0\fP\fB, png_int_32 \fP\fIX1\fP\fB, int \fP\fItype\fP\fB, int \fP\fInparams\fP\fB, png_charp \fP\fIunits\fP\fB, png_charpp \fIparams\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIx_pixels_per_unit\fP\fB, png_uint_32 \fP\fIy_pixels_per_unit\fP\fB, int \fIunit_type\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, png_uint_32 \fInum_pal\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_color_8p \fP\fIsbit\fP\fB, int \fIcolor_type\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_sCAL_s (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, png_charp \fP\fIwidth\fP\fB, png_charp \fIheight\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_sRGB (png_structp \fP\fIpng_ptr\fP\fB, int \fIintent\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_spalette_p \fIpalette\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_start_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fItext\fP\fB, png_size_t \fItext_len\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fItrans\fP\fB, png_color_16p \fP\fIvalues\fP\fB, int \fP\fInumber\fP\fB, int \fIcolor_type\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_write_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fItext\fP\fB, png_size_t \fP\fItext_len\fP\fB, int \fIcompression\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoidpf png_zalloc (voidpf \fP\fIpng_ptr\fP\fB, uInt \fP\fIitems\fP\fB, uInt \fIsize\fP\fB);\fP - -\fI\fB - -\fI\fB - -\fBvoid png_zfree (voidpf \fP\fIpng_ptr\fP\fB, voidpf \fIptr\fP\fB);\fP - -\fI\fB +\fBof each \fIfunction. \fI\fB .SH DESCRIPTION -The functions listed above are used privately by libpng +The functions previously listed here are used privately by libpng and are not recommended for use by applications. They are -not "exported" to applications using shared libraries. They -are listed alphabetically here as an aid to libpng maintainers. -See png.h for more information on these functions. +not "exported" to applications using shared libraries. .SH SEE ALSO .BR "png"(5), " libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5) diff --git a/src/png/ltmain.sh b/src/png/ltmain.sh deleted file mode 100755 index 04eaea408c..0000000000 --- a/src/png/ltmain.sh +++ /dev/null @@ -1,8745 +0,0 @@ -# Generated from ltmain.m4sh. - -# libtool (GNU libtool) 2.2.10 -# Written by Gordon Matzigkeit , 1996 - -# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, -# 2007, 2008, 2009, 2010 Free Software Foundation, Inc. -# This is free software; see the source for copying conditions. There is NO -# warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - -# GNU Libtool is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# As a special exception to the GNU General Public License, -# if you distribute this file as part of a program or library that -# is built using GNU Libtool, you may include this file under the -# same distribution terms that you use for the rest of that program. -# -# GNU Libtool is distributed in the hope that it will be useful, but -# WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with GNU Libtool; see the file COPYING. If not, a copy -# can be downloaded from http://www.gnu.org/licenses/gpl.html, -# or obtained by writing to the Free Software Foundation, Inc., -# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - -# Usage: $progname [OPTION]... [MODE-ARG]... -# -# Provide generalized library-building support services. -# -# --config show all configuration variables -# --debug enable verbose shell tracing -# -n, --dry-run display commands without modifying any files -# --features display basic configuration information and exit -# --mode=MODE use operation mode MODE -# --preserve-dup-deps don't remove duplicate dependency libraries -# --quiet, --silent don't print informational messages -# --no-quiet, --no-silent -# print informational messages (default) -# --tag=TAG use configuration variables from tag TAG -# -v, --verbose print more informational messages than default -# --no-verbose don't print the extra informational messages -# --version print version information -# -h, --help, --help-all print short, long, or detailed help message -# -# MODE must be one of the following: -# -# clean remove files from the build directory -# compile compile a source file into a libtool object -# execute automatically set library path, then run a program -# finish complete the installation of libtool libraries -# install install libraries or executables -# link create a library or an executable -# uninstall remove libraries from an installed directory -# -# MODE-ARGS vary depending on the MODE. When passed as first option, -# `--mode=MODE' may be abbreviated as `MODE' or a unique abbreviation of that. -# Try `$progname --help --mode=MODE' for a more detailed description of MODE. -# -# When reporting a bug, please describe a test case to reproduce it and -# include the following information: -# -# host-triplet: $host -# shell: $SHELL -# compiler: $LTCC -# compiler flags: $LTCFLAGS -# linker: $LD (gnu? $with_gnu_ld) -# $progname: (GNU libtool) 2.2.10 -# automake: $automake_version -# autoconf: $autoconf_version -# -# Report bugs to . - -PROGRAM=libtool -PACKAGE=libtool -VERSION=2.2.10 -TIMESTAMP="" -package_revision=1.3175 - -# Be Bourne compatible -if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then - emulate sh - NULLCMD=: - # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which - # is contrary to our usage. Disable this feature. - alias -g '${1+"$@"}'='"$@"' - setopt NO_GLOB_SUBST -else - case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac -fi -BIN_SH=xpg4; export BIN_SH # for Tru64 -DUALCASE=1; export DUALCASE # for MKS sh - -# A function that is used when there is no print builtin or printf. -func_fallback_echo () -{ - eval 'cat <<_LTECHO_EOF -$1 -_LTECHO_EOF' -} - -# NLS nuisances: We save the old values to restore during execute mode. -lt_user_locale= -lt_safe_locale= -for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES -do - eval "if test \"\${$lt_var+set}\" = set; then - save_$lt_var=\$$lt_var - $lt_var=C - export $lt_var - lt_user_locale=\"$lt_var=\\\$save_\$lt_var; \$lt_user_locale\" - lt_safe_locale=\"$lt_var=C; \$lt_safe_locale\" - fi" -done -LC_ALL=C -LANGUAGE=C -export LANGUAGE LC_ALL - -$lt_unset CDPATH - - -# Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh -# is ksh but when the shell is invoked as "sh" and the current value of -# the _XPG environment variable is not equal to 1 (one), the special -# positional parameter $0, within a function call, is the name of the -# function. -progpath="$0" - - - -: ${CP="cp -f"} -test "${ECHO+set}" = set || ECHO=${as_echo-'printf %s\n'} -: ${EGREP="grep -E"} -: ${FGREP="grep -F"} -: ${GREP="grep"} -: ${LN_S="ln -s"} -: ${MAKE="make"} -: ${MKDIR="mkdir"} -: ${MV="mv -f"} -: ${RM="rm -f"} -: ${SED="sed"} -: ${SHELL="${CONFIG_SHELL-/bin/sh}"} -: ${Xsed="$SED -e 1s/^X//"} - -# Global variables: -EXIT_SUCCESS=0 -EXIT_FAILURE=1 -EXIT_MISMATCH=63 # $? = 63 is used to indicate version mismatch to missing. -EXIT_SKIP=77 # $? = 77 is used to indicate a skipped test to automake. - -exit_status=$EXIT_SUCCESS - -# Make sure IFS has a sensible default -lt_nl=' -' -IFS=" $lt_nl" - -dirname="s,/[^/]*$,," -basename="s,^.*/,," - -# func_dirname_and_basename file append nondir_replacement -# perform func_basename and func_dirname in a single function -# call: -# dirname: Compute the dirname of FILE. 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For efficiency, we do not delegate to -# those functions but instead duplicate the functionality here. -func_dirname_and_basename () -{ - # Extract subdirectory from the argument. - func_dirname_result=`$ECHO "${1}" | $SED -e "$dirname"` - if test "X$func_dirname_result" = "X${1}"; then - func_dirname_result="${3}" - else - func_dirname_result="$func_dirname_result${2}" - fi - func_basename_result=`$ECHO "${1}" | $SED -e "$basename"` -} - -# Generated shell functions inserted here. - -# These SED scripts presuppose an absolute path with a trailing slash. -pathcar='s,^/\([^/]*\).*$,\1,' -pathcdr='s,^/[^/]*,,' -removedotparts=':dotsl - s@/\./@/@g - t dotsl - s,/\.$,/,' -collapseslashes='s@/\{1,\}@/@g' -finalslash='s,/*$,/,' - -# func_normal_abspath PATH -# Remove doubled-up and trailing slashes, "." path components, -# and cancel out any ".." path components in PATH after making -# it an absolute path. -# value returned in "$func_normal_abspath_result" -func_normal_abspath () -{ - # Start from root dir and reassemble the path. - func_normal_abspath_result= - func_normal_abspath_tpath=$1 - func_normal_abspath_altnamespace= - case $func_normal_abspath_tpath in - "") - # Empty path, that just means $cwd. - func_stripname '' '/' "`pwd`" - func_normal_abspath_result=$func_stripname_result - return - ;; - # The next three entries are used to spot a run of precisely - # two leading slashes without using negated character classes; - # we take advantage of case's first-match behaviour. - ///*) - # Unusual form of absolute path, do nothing. - ;; - //*) - # Not necessarily an ordinary path; POSIX reserves leading '//' - # and for example Cygwin uses it to access remote file shares - # over CIFS/SMB, so we conserve a leading double slash if found. - func_normal_abspath_altnamespace=/ - ;; - /*) - # Absolute path, do nothing. - ;; - *) - # Relative path, prepend $cwd. - func_normal_abspath_tpath=`pwd`/$func_normal_abspath_tpath - ;; - esac - # Cancel out all the simple stuff to save iterations. 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This is $PACKAGE $VERSION, but the -$progname: definition of this LT_INIT comes from an older release. -$progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION -$progname: and run autoconf again. -_LT_EOF - else - cat >&2 <<_LT_EOF -$progname: Version mismatch error. This is $PACKAGE $VERSION, but the -$progname: definition of this LT_INIT comes from $PACKAGE $macro_version. -$progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION -$progname: and run autoconf again. -_LT_EOF - fi - else - cat >&2 <<_LT_EOF -$progname: Version mismatch error. 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*) false;; esac; then - # Aesthetically quote it. - func_quote_for_eval "$nonopt" - install_prog="$func_quote_for_eval_result " - arg=$1 - shift - else - install_prog= - arg=$nonopt - fi - - # The real first argument should be the name of the installation program. - # Aesthetically quote it. - func_quote_for_eval "$arg" - install_prog="$install_prog$func_quote_for_eval_result" - install_shared_prog=$install_prog - case " $install_prog " in - *[\\\ /]cp\ *) install_cp=: ;; - *) install_cp=false ;; - esac - - # We need to accept at least all the BSD install flags. - dest= - files= - opts= - prev= - install_type= - isdir=no - stripme= - no_mode=: - for arg - do - arg2= - if test -n "$dest"; then - files="$files $dest" - dest=$arg - continue - fi - - case $arg in - -d) isdir=yes ;; - -f) - if $install_cp; then :; else - prev=$arg - fi - ;; - -g | -m | -o) - prev=$arg - ;; - -s) - stripme=" -s" - continue - ;; - -*) - ;; - *) - # If the previous option needed an argument, then skip it. - if test -n "$prev"; then - if test "x$prev" = x-m && test -n "$install_override_mode"; then - arg2=$install_override_mode - no_mode=false - fi - prev= - else - dest=$arg - continue - fi - ;; - esac - - # Aesthetically quote the argument. - func_quote_for_eval "$arg" - install_prog="$install_prog $func_quote_for_eval_result" - if test -n "$arg2"; then - func_quote_for_eval "$arg2" - fi - install_shared_prog="$install_shared_prog $func_quote_for_eval_result" - done - - test -z "$install_prog" && \ - func_fatal_help "you must specify an install program" - - test -n "$prev" && \ - func_fatal_help "the \`$prev' option requires an argument" - - if test -n "$install_override_mode" && $no_mode; then - if $install_cp; then :; else - func_quote_for_eval "$install_override_mode" - install_shared_prog="$install_shared_prog -m $func_quote_for_eval_result" - fi - fi - - if test -z "$files"; then - if test -z "$dest"; then - func_fatal_help "no file or destination specified" - else - func_fatal_help "you must specify a destination" - fi - fi - - # Strip any trailing slash from the destination. - func_stripname '' '/' "$dest" - dest=$func_stripname_result - - # Check to see that the destination is a directory. - test -d "$dest" && isdir=yes - if test "$isdir" = yes; then - destdir="$dest" - destname= - else - func_dirname_and_basename "$dest" "" "." - destdir="$func_dirname_result" - destname="$func_basename_result" - - # Not a directory, so check to see that there is only one file specified. - set dummy $files; shift - test "$#" -gt 1 && \ - func_fatal_help "\`$dest' is not a directory" - fi - case $destdir in - [\\/]* | [A-Za-z]:[\\/]*) ;; - *) - for file in $files; do - case $file in - *.lo) ;; - *) - func_fatal_help "\`$destdir' must be an absolute directory name" - ;; - esac - done - ;; - esac - - # This variable tells wrapper scripts just to set variables rather - # than running their programs. - libtool_install_magic="$magic" - - staticlibs= - future_libdirs= - current_libdirs= - for file in $files; do - - # Do each installation. - case $file in - *.$libext) - # Do the static libraries later. - staticlibs="$staticlibs $file" - ;; - - *.la) - # Check to see that this really is a libtool archive. - func_lalib_unsafe_p "$file" \ - || func_fatal_help "\`$file' is not a valid libtool archive" - - library_names= - old_library= - relink_command= - func_source "$file" - - # Add the libdir to current_libdirs if it is the destination. - if test "X$destdir" = "X$libdir"; then - case "$current_libdirs " in - *" $libdir "*) ;; - *) current_libdirs="$current_libdirs $libdir" ;; - esac - else - # Note the libdir as a future libdir. - case "$future_libdirs " in - *" $libdir "*) ;; - *) future_libdirs="$future_libdirs $libdir" ;; - esac - fi - - func_dirname "$file" "/" "" - dir="$func_dirname_result" - dir="$dir$objdir" - - if test -n "$relink_command"; then - # Determine the prefix the user has applied to our future dir. - inst_prefix_dir=`$ECHO "$destdir" | $SED -e "s%$libdir\$%%"` - - # Don't allow the user to place us outside of our expected - # location b/c this prevents finding dependent libraries that - # are installed to the same prefix. - # At present, this check doesn't affect windows .dll's that - # are installed into $libdir/../bin (currently, that works fine) - # but it's something to keep an eye on. - test "$inst_prefix_dir" = "$destdir" && \ - func_fatal_error "error: cannot install \`$file' to a directory not ending in $libdir" - - if test -n "$inst_prefix_dir"; then - # Stick the inst_prefix_dir data into the link command. - relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%-inst-prefix-dir $inst_prefix_dir%"` - else - relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%%"` - fi - - func_warning "relinking \`$file'" - func_show_eval "$relink_command" \ - 'func_fatal_error "error: relink \`$file'\'' with the above command before installing it"' - fi - - # See the names of the shared library. - set dummy $library_names; shift - if test -n "$1"; then - realname="$1" - shift - - srcname="$realname" - test -n "$relink_command" && srcname="$realname"T - - # Install the shared library and build the symlinks. - func_show_eval "$install_shared_prog $dir/$srcname $destdir/$realname" \ - 'exit $?' - tstripme="$stripme" - case $host_os in - cygwin* | mingw* | pw32* | cegcc*) - case $realname in - *.dll.a) - tstripme="" - ;; - esac - ;; - esac - if test -n "$tstripme" && test -n "$striplib"; then - func_show_eval "$striplib $destdir/$realname" 'exit $?' - fi - - if test "$#" -gt 0; then - # Delete the old symlinks, and create new ones. - # Try `ln -sf' first, because the `ln' binary might depend on - # the symlink we replace! Solaris /bin/ln does not understand -f, - # so we also need to try rm && ln -s. - for linkname - do - test "$linkname" != "$realname" \ - && func_show_eval "(cd $destdir && { $LN_S -f $realname $linkname || { $RM $linkname && $LN_S $realname $linkname; }; })" - done - fi - - # Do each command in the postinstall commands. - lib="$destdir/$realname" - func_execute_cmds "$postinstall_cmds" 'exit $?' - fi - - # Install the pseudo-library for information purposes. - func_basename "$file" - name="$func_basename_result" - instname="$dir/$name"i - func_show_eval "$install_prog $instname $destdir/$name" 'exit $?' - - # Maybe install the static library, too. - test -n "$old_library" && staticlibs="$staticlibs $dir/$old_library" - ;; - - *.lo) - # Install (i.e. copy) a libtool object. - - # Figure out destination file name, if it wasn't already specified. - if test -n "$destname"; then - destfile="$destdir/$destname" - else - func_basename "$file" - destfile="$func_basename_result" - destfile="$destdir/$destfile" - fi - - # Deduce the name of the destination old-style object file. - case $destfile in - *.lo) - func_lo2o "$destfile" - staticdest=$func_lo2o_result - ;; - *.$objext) - staticdest="$destfile" - destfile= - ;; - *) - func_fatal_help "cannot copy a libtool object to \`$destfile'" - ;; - esac - - # Install the libtool object if requested. - test -n "$destfile" && \ - func_show_eval "$install_prog $file $destfile" 'exit $?' - - # Install the old object if enabled. - if test "$build_old_libs" = yes; then - # Deduce the name of the old-style object file. - func_lo2o "$file" - staticobj=$func_lo2o_result - func_show_eval "$install_prog \$staticobj \$staticdest" 'exit $?' - fi - exit $EXIT_SUCCESS - ;; - - *) - # Figure out destination file name, if it wasn't already specified. - if test -n "$destname"; then - destfile="$destdir/$destname" - else - func_basename "$file" - destfile="$func_basename_result" - destfile="$destdir/$destfile" - fi - - # If the file is missing, and there is a .exe on the end, strip it - # because it is most likely a libtool script we actually want to - # install - stripped_ext="" - case $file in - *.exe) - if test ! -f "$file"; then - func_stripname '' '.exe' "$file" - file=$func_stripname_result - stripped_ext=".exe" - fi - ;; - esac - - # Do a test to see if this is really a libtool program. - case $host in - *cygwin* | *mingw*) - if func_ltwrapper_executable_p "$file"; then - func_ltwrapper_scriptname "$file" - wrapper=$func_ltwrapper_scriptname_result - else - func_stripname '' '.exe' "$file" - wrapper=$func_stripname_result - fi - ;; - *) - wrapper=$file - ;; - esac - if func_ltwrapper_script_p "$wrapper"; then - notinst_deplibs= - relink_command= - - func_source "$wrapper" - - # Check the variables that should have been set. - test -z "$generated_by_libtool_version" && \ - func_fatal_error "invalid libtool wrapper script \`$wrapper'" - - finalize=yes - for lib in $notinst_deplibs; do - # Check to see that each library is installed. - libdir= - if test -f "$lib"; then - func_source "$lib" - fi - libfile="$libdir/"`$ECHO "$lib" | $SED 's%^.*/%%g'` ### testsuite: skip nested quoting test - if test -n "$libdir" && test ! -f "$libfile"; then - func_warning "\`$lib' has not been installed in \`$libdir'" - finalize=no - fi - done - - relink_command= - func_source "$wrapper" - - outputname= - if test "$fast_install" = no && test -n "$relink_command"; then - $opt_dry_run || { - if test "$finalize" = yes; then - tmpdir=`func_mktempdir` - func_basename "$file$stripped_ext" - file="$func_basename_result" - outputname="$tmpdir/$file" - # Replace the output file specification. - relink_command=`$ECHO "$relink_command" | $SED 's%@OUTPUT@%'"$outputname"'%g'` - - $opt_silent || { - func_quote_for_expand "$relink_command" - eval "func_echo $func_quote_for_expand_result" - } - if eval "$relink_command"; then : - else - func_error "error: relink \`$file' with the above command before installing it" - $opt_dry_run || ${RM}r "$tmpdir" - continue - fi - file="$outputname" - else - func_warning "cannot relink \`$file'" - fi - } - else - # Install the binary that we compiled earlier. - file=`$ECHO "$file$stripped_ext" | $SED "s%\([^/]*\)$%$objdir/\1%"` - fi - fi - - # remove .exe since cygwin /usr/bin/install will append another - # one anyway - case $install_prog,$host in - */usr/bin/install*,*cygwin*) - case $file:$destfile in - *.exe:*.exe) - # this is ok - ;; - *.exe:*) - destfile=$destfile.exe - ;; - *:*.exe) - func_stripname '' '.exe' "$destfile" - destfile=$func_stripname_result - ;; - esac - ;; - esac - func_show_eval "$install_prog\$stripme \$file \$destfile" 'exit $?' - $opt_dry_run || if test -n "$outputname"; then - ${RM}r "$tmpdir" - fi - ;; - esac - done - - for file in $staticlibs; do - func_basename "$file" - name="$func_basename_result" - - # Set up the ranlib parameters. - oldlib="$destdir/$name" - - func_show_eval "$install_prog \$file \$oldlib" 'exit $?' - - if test -n "$stripme" && test -n "$old_striplib"; then - func_show_eval "$old_striplib $oldlib" 'exit $?' - fi - - # Do each command in the postinstall commands. - func_execute_cmds "$old_postinstall_cmds" 'exit $?' - done - - test -n "$future_libdirs" && \ - func_warning "remember to run \`$progname --finish$future_libdirs'" - - if test -n "$current_libdirs"; then - # Maybe just do a dry run. - $opt_dry_run && current_libdirs=" -n$current_libdirs" - exec_cmd='$SHELL $progpath $preserve_args --finish$current_libdirs' - else - exit $EXIT_SUCCESS - fi -} - -test "$mode" = install && func_mode_install ${1+"$@"} - - -# func_generate_dlsyms outputname originator pic_p -# Extract symbols from dlprefiles and create ${outputname}S.o with -# a dlpreopen symbol table. -func_generate_dlsyms () -{ - $opt_debug - my_outputname="$1" - my_originator="$2" - my_pic_p="${3-no}" - my_prefix=`$ECHO "$my_originator" | sed 's%[^a-zA-Z0-9]%_%g'` - my_dlsyms= - - if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then - if test -n "$NM" && test -n "$global_symbol_pipe"; then - my_dlsyms="${my_outputname}S.c" - else - func_error "not configured to extract global symbols from dlpreopened files" - fi - fi - - if test -n "$my_dlsyms"; then - case $my_dlsyms in - "") ;; - *.c) - # Discover the nlist of each of the dlfiles. - nlist="$output_objdir/${my_outputname}.nm" - - func_show_eval "$RM $nlist ${nlist}S ${nlist}T" - - # Parse the name list into a source file. - func_verbose "creating $output_objdir/$my_dlsyms" - - $opt_dry_run || $ECHO > "$output_objdir/$my_dlsyms" "\ -/* $my_dlsyms - symbol resolution table for \`$my_outputname' dlsym emulation. */ -/* Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION */ - -#ifdef __cplusplus -extern \"C\" { -#endif - -#if defined(__GNUC__) && (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 4)) || (__GNUC__ > 4)) -#pragma GCC diagnostic ignored \"-Wstrict-prototypes\" -#endif - -/* External symbol declarations for the compiler. */\ -" - - if test "$dlself" = yes; then - func_verbose "generating symbol list for \`$output'" - - $opt_dry_run || echo ': @PROGRAM@ ' > "$nlist" - - # Add our own program objects to the symbol list. - progfiles=`$ECHO "$objs$old_deplibs" | $SP2NL | $SED "$lo2o" | $NL2SP` - for progfile in $progfiles; do - func_verbose "extracting global C symbols from \`$progfile'" - $opt_dry_run || eval "$NM $progfile | $global_symbol_pipe >> '$nlist'" - done - - if test -n "$exclude_expsyms"; then - $opt_dry_run || { - eval '$EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - } - fi - - if test -n "$export_symbols_regex"; then - $opt_dry_run || { - eval '$EGREP -e "$export_symbols_regex" "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - } - fi - - # Prepare the list of exported symbols - if test -z "$export_symbols"; then - export_symbols="$output_objdir/$outputname.exp" - $opt_dry_run || { - $RM $export_symbols - eval "${SED} -n -e '/^: @PROGRAM@ $/d' -e 's/^.* \(.*\)$/\1/p' "'< "$nlist" > "$export_symbols"' - case $host in - *cygwin* | *mingw* | *cegcc* ) - eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' - eval 'cat "$export_symbols" >> "$output_objdir/$outputname.def"' - ;; - esac - } - else - $opt_dry_run || { - eval "${SED} -e 's/\([].[*^$]\)/\\\\\1/g' -e 's/^/ /' -e 's/$/$/'"' < "$export_symbols" > "$output_objdir/$outputname.exp"' - eval '$GREP -f "$output_objdir/$outputname.exp" < "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - case $host in - *cygwin* | *mingw* | *cegcc* ) - eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' - eval 'cat "$nlist" >> "$output_objdir/$outputname.def"' - ;; - esac - } - fi - fi - - for dlprefile in $dlprefiles; do - func_verbose "extracting global C symbols from \`$dlprefile'" - func_basename "$dlprefile" - name="$func_basename_result" - $opt_dry_run || { - eval '$ECHO ": $name " >> "$nlist"' - eval "$NM $dlprefile 2>/dev/null | $global_symbol_pipe >> '$nlist'" - } - done - - $opt_dry_run || { - # Make sure we have at least an empty file. - test -f "$nlist" || : > "$nlist" - - if test -n "$exclude_expsyms"; then - $EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T - $MV "$nlist"T "$nlist" - fi - - # Try sorting and uniquifying the output. - if $GREP -v "^: " < "$nlist" | - if sort -k 3 /dev/null 2>&1; then - sort -k 3 - else - sort +2 - fi | - uniq > "$nlist"S; then - : - else - $GREP -v "^: " < "$nlist" > "$nlist"S - fi - - if test -f "$nlist"S; then - eval "$global_symbol_to_cdecl"' < "$nlist"S >> "$output_objdir/$my_dlsyms"' - else - echo '/* NONE */' >> "$output_objdir/$my_dlsyms" - fi - - echo >> "$output_objdir/$my_dlsyms" "\ - -/* The mapping between symbol names and symbols. */ -typedef struct { - const char *name; - void *address; -} lt_dlsymlist; -" - case $host in - *cygwin* | *mingw* | *cegcc* ) - echo >> "$output_objdir/$my_dlsyms" "\ -/* DATA imports from DLLs on WIN32 con't be const, because - runtime relocations are performed -- see ld's documentation - on pseudo-relocs. */" - lt_dlsym_const= ;; - *osf5*) - echo >> "$output_objdir/$my_dlsyms" "\ -/* This system does not cope well with relocations in const data */" - lt_dlsym_const= ;; - *) - lt_dlsym_const=const ;; - esac - - echo >> "$output_objdir/$my_dlsyms" "\ -extern $lt_dlsym_const lt_dlsymlist -lt_${my_prefix}_LTX_preloaded_symbols[]; -$lt_dlsym_const lt_dlsymlist -lt_${my_prefix}_LTX_preloaded_symbols[] = -{\ - { \"$my_originator\", (void *) 0 }," - - case $need_lib_prefix in - no) - eval "$global_symbol_to_c_name_address" < "$nlist" >> "$output_objdir/$my_dlsyms" - ;; - *) - eval "$global_symbol_to_c_name_address_lib_prefix" < "$nlist" >> "$output_objdir/$my_dlsyms" - ;; - esac - echo >> "$output_objdir/$my_dlsyms" "\ - {0, (void *) 0} -}; - -/* This works around a problem in FreeBSD linker */ -#ifdef FREEBSD_WORKAROUND -static const void *lt_preloaded_setup() { - return lt_${my_prefix}_LTX_preloaded_symbols; -} -#endif - -#ifdef __cplusplus -} -#endif\ -" - } # !$opt_dry_run - - pic_flag_for_symtable= - case "$compile_command " in - *" -static "*) ;; - *) - case $host in - # compiling the symbol table file with pic_flag works around - # a FreeBSD bug that causes programs to crash when -lm is - # linked before any other PIC object. But we must not use - # pic_flag when linking with -static. The problem exists in - # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1. - *-*-freebsd2*|*-*-freebsd3.0*|*-*-freebsdelf3.0*) - pic_flag_for_symtable=" $pic_flag -DFREEBSD_WORKAROUND" ;; - *-*-hpux*) - pic_flag_for_symtable=" $pic_flag" ;; - *) - if test "X$my_pic_p" != Xno; then - pic_flag_for_symtable=" $pic_flag" - fi - ;; - esac - ;; - esac - symtab_cflags= - for arg in $LTCFLAGS; do - case $arg in - -pie | -fpie | -fPIE) ;; - *) symtab_cflags="$symtab_cflags $arg" ;; - esac - done - - # Now compile the dynamic symbol file. - func_show_eval '(cd $output_objdir && $LTCC$symtab_cflags -c$no_builtin_flag$pic_flag_for_symtable "$my_dlsyms")' 'exit $?' - - # Clean up the generated files. - func_show_eval '$RM "$output_objdir/$my_dlsyms" "$nlist" "${nlist}S" "${nlist}T"' - - # Transform the symbol file into the correct name. - symfileobj="$output_objdir/${my_outputname}S.$objext" - case $host in - *cygwin* | *mingw* | *cegcc* ) - if test -f "$output_objdir/$my_outputname.def"; then - compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` - finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` - else - compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$symfileobj%"` - finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$symfileobj%"` - fi - ;; - *) - compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$symfileobj%"` - finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$symfileobj%"` - ;; - esac - ;; - *) - func_fatal_error "unknown suffix for \`$my_dlsyms'" - ;; - esac - else - # We keep going just in case the user didn't refer to - # lt_preloaded_symbols. The linker will fail if global_symbol_pipe - # really was required. - - # Nullify the symbol file. - compile_command=`$ECHO "$compile_command" | $SED "s% @SYMFILE@%%"` - finalize_command=`$ECHO "$finalize_command" | $SED "s% @SYMFILE@%%"` - fi -} - -# func_win32_libid arg -# return the library type of file 'arg' -# -# Need a lot of goo to handle *both* DLLs and import libs -# Has to be a shell function in order to 'eat' the argument -# that is supplied when $file_magic_command is called. -# Despite the name, also deal with 64 bit binaries. -func_win32_libid () -{ - $opt_debug - win32_libid_type="unknown" - win32_fileres=`file -L $1 2>/dev/null` - case $win32_fileres in - *ar\ archive\ import\ library*) # definitely import - win32_libid_type="x86 archive import" - ;; - *ar\ archive*) # could be an import, or static - # Keep the egrep pattern in sync with the one in _LT_CHECK_MAGIC_METHOD. - if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null | - $EGREP 'file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)' >/dev/null; then - win32_nmres=`eval $NM -f posix -A $1 | - $SED -n -e ' - 1,100{ - / I /{ - s,.*,import, - p - q - } - }'` - case $win32_nmres in - import*) win32_libid_type="x86 archive import";; - *) win32_libid_type="x86 archive static";; - esac - fi - ;; - *DLL*) - win32_libid_type="x86 DLL" - ;; - *executable*) # but shell scripts are "executable" too... - case $win32_fileres in - *MS\ Windows\ PE\ Intel*) - win32_libid_type="x86 DLL" - ;; - esac - ;; - esac - $ECHO "$win32_libid_type" -} - - - -# func_extract_an_archive dir oldlib -func_extract_an_archive () -{ - $opt_debug - f_ex_an_ar_dir="$1"; shift - f_ex_an_ar_oldlib="$1" - if test "$lock_old_archive_extraction" = yes; then - lockfile=$f_ex_an_ar_oldlib.lock - until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do - func_echo "Waiting for $lockfile to be removed" - sleep 2 - done - fi - func_show_eval "(cd \$f_ex_an_ar_dir && $AR x \"\$f_ex_an_ar_oldlib\")" \ - 'stat=$?; rm -f "$lockfile"; exit $stat' - if test "$lock_old_archive_extraction" = yes; then - $opt_dry_run || rm -f "$lockfile" - fi - if ($AR t "$f_ex_an_ar_oldlib" | sort | sort -uc >/dev/null 2>&1); then - : - else - func_fatal_error "object name conflicts in archive: $f_ex_an_ar_dir/$f_ex_an_ar_oldlib" - fi -} - - -# func_extract_archives gentop oldlib ... -func_extract_archives () -{ - $opt_debug - my_gentop="$1"; shift - my_oldlibs=${1+"$@"} - my_oldobjs="" - my_xlib="" - my_xabs="" - my_xdir="" - - for my_xlib in $my_oldlibs; do - # Extract the objects. - case $my_xlib in - [\\/]* | [A-Za-z]:[\\/]*) my_xabs="$my_xlib" ;; - *) my_xabs=`pwd`"/$my_xlib" ;; - esac - func_basename "$my_xlib" - my_xlib="$func_basename_result" - my_xlib_u=$my_xlib - while :; do - case " $extracted_archives " in - *" $my_xlib_u "*) - func_arith $extracted_serial + 1 - extracted_serial=$func_arith_result - my_xlib_u=lt$extracted_serial-$my_xlib ;; - *) break ;; - esac - done - extracted_archives="$extracted_archives $my_xlib_u" - my_xdir="$my_gentop/$my_xlib_u" - - func_mkdir_p "$my_xdir" - - case $host in - *-darwin*) - func_verbose "Extracting $my_xabs" - # Do not bother doing anything if just a dry run - $opt_dry_run || { - darwin_orig_dir=`pwd` - cd $my_xdir || exit $? - darwin_archive=$my_xabs - darwin_curdir=`pwd` - darwin_base_archive=`basename "$darwin_archive"` - darwin_arches=`$LIPO -info "$darwin_archive" 2>/dev/null | $GREP Architectures 2>/dev/null || true` - if test -n "$darwin_arches"; then - darwin_arches=`$ECHO "$darwin_arches" | $SED -e 's/.*are://'` - darwin_arch= - func_verbose "$darwin_base_archive has multiple architectures $darwin_arches" - for darwin_arch in $darwin_arches ; do - func_mkdir_p "unfat-$$/${darwin_base_archive}-${darwin_arch}" - $LIPO -thin $darwin_arch -output "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" "${darwin_archive}" - cd "unfat-$$/${darwin_base_archive}-${darwin_arch}" - func_extract_an_archive "`pwd`" "${darwin_base_archive}" - cd "$darwin_curdir" - $RM "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" - done # $darwin_arches - ## Okay now we've a bunch of thin objects, gotta fatten them up :) - darwin_filelist=`find unfat-$$ -type f -name \*.o -print -o -name \*.lo -print | $SED -e "$basename" | sort -u` - darwin_file= - darwin_files= - for darwin_file in $darwin_filelist; do - darwin_files=`find unfat-$$ -name $darwin_file -print | sort | $NL2SP` - $LIPO -create -output "$darwin_file" $darwin_files - done # $darwin_filelist - $RM -rf unfat-$$ - cd "$darwin_orig_dir" - else - cd $darwin_orig_dir - func_extract_an_archive "$my_xdir" "$my_xabs" - fi # $darwin_arches - } # !$opt_dry_run - ;; - *) - func_extract_an_archive "$my_xdir" "$my_xabs" - ;; - esac - my_oldobjs="$my_oldobjs "`find $my_xdir -name \*.$objext -print -o -name \*.lo -print | sort | $NL2SP` - done - - func_extract_archives_result="$my_oldobjs" -} - - -# func_emit_wrapper [arg=no] -# -# Emit a libtool wrapper script on stdout. -# Don't directly open a file because we may want to -# incorporate the script contents within a cygwin/mingw -# wrapper executable. Must ONLY be called from within -# func_mode_link because it depends on a number of variables -# set therein. -# -# ARG is the value that the WRAPPER_SCRIPT_BELONGS_IN_OBJDIR -# variable will take. If 'yes', then the emitted script -# will assume that the directory in which it is stored is -# the $objdir directory. This is a cygwin/mingw-specific -# behavior. -func_emit_wrapper () -{ - func_emit_wrapper_arg1=${1-no} - - $ECHO "\ -#! $SHELL - -# $output - temporary wrapper script for $objdir/$outputname -# Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION -# -# The $output program cannot be directly executed until all the libtool -# libraries that it depends on are installed. -# -# This wrapper script should never be moved out of the build directory. -# If it is, it will not operate correctly. - -# Sed substitution that helps us do robust quoting. It backslashifies -# metacharacters that are still active within double-quoted strings. -sed_quote_subst='$sed_quote_subst' - -# Be Bourne compatible -if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then - emulate sh - NULLCMD=: - # Zsh 3.x and 4.x performs word splitting on \${1+\"\$@\"}, which - # is contrary to our usage. Disable this feature. - alias -g '\${1+\"\$@\"}'='\"\$@\"' - setopt NO_GLOB_SUBST -else - case \`(set -o) 2>/dev/null\` in *posix*) set -o posix;; esac -fi -BIN_SH=xpg4; export BIN_SH # for Tru64 -DUALCASE=1; export DUALCASE # for MKS sh - -# The HP-UX ksh and POSIX shell print the target directory to stdout -# if CDPATH is set. -(unset CDPATH) >/dev/null 2>&1 && unset CDPATH - -relink_command=\"$relink_command\" - -# This environment variable determines our operation mode. -if test \"\$libtool_install_magic\" = \"$magic\"; then - # install mode needs the following variables: - generated_by_libtool_version='$macro_version' - notinst_deplibs='$notinst_deplibs' -else - # When we are sourced in execute mode, \$file and \$ECHO are already set. - if test \"\$libtool_execute_magic\" != \"$magic\"; then - file=\"\$0\"" - - qECHO=`$ECHO "$ECHO" | $SED "$sed_quote_subst"` - $ECHO "\ - -# A function that is used when there is no print builtin or printf. -func_fallback_echo () -{ - eval 'cat <<_LTECHO_EOF -\$1 -_LTECHO_EOF' -} - ECHO=\"$qECHO\" - fi - -# Very basic option parsing. These options are (a) specific to -# the libtool wrapper, (b) are identical between the wrapper -# /script/ and the wrapper /executable/ which is used only on -# windows platforms, and (c) all begin with the string "--lt-" -# (application programs are unlikely to have options which match -# this pattern). -# -# There are only two supported options: --lt-debug and -# --lt-dump-script. There is, deliberately, no --lt-help. -# -# The first argument to this parsing function should be the -# script's $0 value, followed by "$@". -lt_option_debug= -func_parse_lt_options () -{ - lt_script_arg0=\$0 - shift - for lt_opt - do - case \"\$lt_opt\" in - --lt-debug) lt_option_debug=1 ;; - --lt-dump-script) - lt_dump_D=\`\$ECHO \"X\$lt_script_arg0\" | $SED -e 's/^X//' -e 's%/[^/]*$%%'\` - test \"X\$lt_dump_D\" = \"X\$lt_script_arg0\" && lt_dump_D=. - lt_dump_F=\`\$ECHO \"X\$lt_script_arg0\" | $SED -e 's/^X//' -e 's%^.*/%%'\` - cat \"\$lt_dump_D/\$lt_dump_F\" - exit 0 - ;; - --lt-*) - \$ECHO \"Unrecognized --lt- option: '\$lt_opt'\" 1>&2 - exit 1 - ;; - esac - done - - # Print the debug banner immediately: - if test -n \"\$lt_option_debug\"; then - echo \"${outputname}:${output}:\${LINENO}: libtool wrapper (GNU $PACKAGE$TIMESTAMP) $VERSION\" 1>&2 - fi -} - -# Used when --lt-debug. Prints its arguments to stdout -# (redirection is the responsibility of the caller) -func_lt_dump_args () -{ - lt_dump_args_N=1; - for lt_arg - do - \$ECHO \"${outputname}:${output}:\${LINENO}: newargv[\$lt_dump_args_N]: \$lt_arg\" - lt_dump_args_N=\`expr \$lt_dump_args_N + 1\` - done -} - -# Core function for launching the target application -func_exec_program_core () -{ -" - case $host in - # Backslashes separate directories on plain windows - *-*-mingw | *-*-os2* | *-cegcc*) - $ECHO "\ - if test -n \"\$lt_option_debug\"; then - \$ECHO \"${outputname}:${output}:\${LINENO}: newargv[0]: \$progdir\\\\\$program\" 1>&2 - func_lt_dump_args \${1+\"\$@\"} 1>&2 - fi - exec \"\$progdir\\\\\$program\" \${1+\"\$@\"} -" - ;; - - *) - $ECHO "\ - if test -n \"\$lt_option_debug\"; then - \$ECHO \"${outputname}:${output}:\${LINENO}: newargv[0]: \$progdir/\$program\" 1>&2 - func_lt_dump_args \${1+\"\$@\"} 1>&2 - fi - exec \"\$progdir/\$program\" \${1+\"\$@\"} -" - ;; - esac - $ECHO "\ - \$ECHO \"\$0: cannot exec \$program \$*\" 1>&2 - exit 1 -} - -# A function to encapsulate launching the target application -# Strips options in the --lt-* namespace from \$@ and -# launches target application with the remaining arguments. -func_exec_program () -{ - for lt_wr_arg - do - case \$lt_wr_arg in - --lt-*) ;; - *) set x \"\$@\" \"\$lt_wr_arg\"; shift;; - esac - shift - done - func_exec_program_core \${1+\"\$@\"} -} - - # Parse options - func_parse_lt_options \"\$0\" \${1+\"\$@\"} - - # Find the directory that this script lives in. - thisdir=\`\$ECHO \"\$file\" | $SED 's%/[^/]*$%%'\` - test \"x\$thisdir\" = \"x\$file\" && thisdir=. - - # Follow symbolic links until we get to the real thisdir. - file=\`ls -ld \"\$file\" | $SED -n 's/.*-> //p'\` - while test -n \"\$file\"; do - destdir=\`\$ECHO \"\$file\" | $SED 's%/[^/]*\$%%'\` - - # If there was a directory component, then change thisdir. - if test \"x\$destdir\" != \"x\$file\"; then - case \"\$destdir\" in - [\\\\/]* | [A-Za-z]:[\\\\/]*) thisdir=\"\$destdir\" ;; - *) thisdir=\"\$thisdir/\$destdir\" ;; - esac - fi - - file=\`\$ECHO \"\$file\" | $SED 's%^.*/%%'\` - file=\`ls -ld \"\$thisdir/\$file\" | $SED -n 's/.*-> //p'\` - done - - # Usually 'no', except on cygwin/mingw when embedded into - # the cwrapper. - WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=$func_emit_wrapper_arg1 - if test \"\$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR\" = \"yes\"; then - # special case for '.' - if test \"\$thisdir\" = \".\"; then - thisdir=\`pwd\` - fi - # remove .libs from thisdir - case \"\$thisdir\" in - *[\\\\/]$objdir ) thisdir=\`\$ECHO \"\$thisdir\" | $SED 's%[\\\\/][^\\\\/]*$%%'\` ;; - $objdir ) thisdir=. ;; - esac - fi - - # Try to get the absolute directory name. - absdir=\`cd \"\$thisdir\" && pwd\` - test -n \"\$absdir\" && thisdir=\"\$absdir\" -" - - if test "$fast_install" = yes; then - $ECHO "\ - program=lt-'$outputname'$exeext - progdir=\"\$thisdir/$objdir\" - - if test ! -f \"\$progdir/\$program\" || - { file=\`ls -1dt \"\$progdir/\$program\" \"\$progdir/../\$program\" 2>/dev/null | ${SED} 1q\`; \\ - test \"X\$file\" != \"X\$progdir/\$program\"; }; then - - file=\"\$\$-\$program\" - - if test ! -d \"\$progdir\"; then - $MKDIR \"\$progdir\" - else - $RM \"\$progdir/\$file\" - fi" - - $ECHO "\ - - # relink executable if necessary - if test -n \"\$relink_command\"; then - if relink_command_output=\`eval \$relink_command 2>&1\`; then : - else - $ECHO \"\$relink_command_output\" >&2 - $RM \"\$progdir/\$file\" - exit 1 - fi - fi - - $MV \"\$progdir/\$file\" \"\$progdir/\$program\" 2>/dev/null || - { $RM \"\$progdir/\$program\"; - $MV \"\$progdir/\$file\" \"\$progdir/\$program\"; } - $RM \"\$progdir/\$file\" - fi" - else - $ECHO "\ - program='$outputname' - progdir=\"\$thisdir/$objdir\" -" - fi - - $ECHO "\ - - if test -f \"\$progdir/\$program\"; then" - - # Export our shlibpath_var if we have one. - if test "$shlibpath_overrides_runpath" = yes && test -n "$shlibpath_var" && test -n "$temp_rpath"; then - $ECHO "\ - # Add our own library path to $shlibpath_var - $shlibpath_var=\"$temp_rpath\$$shlibpath_var\" - - # Some systems cannot cope with colon-terminated $shlibpath_var - # The second colon is a workaround for a bug in BeOS R4 sed - $shlibpath_var=\`\$ECHO \"\$$shlibpath_var\" | $SED 's/::*\$//'\` - - export $shlibpath_var -" - fi - - # fixup the dll searchpath if we need to. - if test -n "$dllsearchpath"; then - $ECHO "\ - # Add the dll search path components to the executable PATH - PATH=$dllsearchpath:\$PATH -" - fi - - $ECHO "\ - if test \"\$libtool_execute_magic\" != \"$magic\"; then - # Run the actual program with our arguments. - func_exec_program \${1+\"\$@\"} - fi - else - # The program doesn't exist. - \$ECHO \"\$0: error: \\\`\$progdir/\$program' does not exist\" 1>&2 - \$ECHO \"This script is just a wrapper for \$program.\" 1>&2 - \$ECHO \"See the $PACKAGE documentation for more information.\" 1>&2 - exit 1 - fi -fi\ -" -} - - -# func_to_host_path arg -# -# Convert paths to host format when used with build tools. -# Intended for use with "native" mingw (where libtool itself -# is running under the msys shell), or in the following cross- -# build environments: -# $build $host -# mingw (msys) mingw [e.g. native] -# cygwin mingw -# *nix + wine mingw -# where wine is equipped with the `winepath' executable. -# In the native mingw case, the (msys) shell automatically -# converts paths for any non-msys applications it launches, -# but that facility isn't available from inside the cwrapper. -# Similar accommodations are necessary for $host mingw and -# $build cygwin. Calling this function does no harm for other -# $host/$build combinations not listed above. -# -# ARG is the path (on $build) that should be converted to -# the proper representation for $host. The result is stored -# in $func_to_host_path_result. -func_to_host_path () -{ - func_to_host_path_result="$1" - if test -n "$1"; then - case $host in - *mingw* ) - lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g' - case $build in - *mingw* ) # actually, msys - # awkward: cmd appends spaces to result - func_to_host_path_result=`( cmd //c echo "$1" ) 2>/dev/null | - $SED -e 's/[ ]*$//' -e "$lt_sed_naive_backslashify"` - ;; - *cygwin* ) - func_to_host_path_result=`cygpath -w "$1" | - $SED -e "$lt_sed_naive_backslashify"` - ;; - * ) - # Unfortunately, winepath does not exit with a non-zero - # error code, so we are forced to check the contents of - # stdout. On the other hand, if the command is not - # found, the shell will set an exit code of 127 and print - # *an error message* to stdout. So we must check for both - # error code of zero AND non-empty stdout, which explains - # the odd construction: - func_to_host_path_tmp1=`winepath -w "$1" 2>/dev/null` - if test "$?" -eq 0 && test -n "${func_to_host_path_tmp1}"; then - func_to_host_path_result=`$ECHO "$func_to_host_path_tmp1" | - $SED -e "$lt_sed_naive_backslashify"` - else - # Allow warning below. - func_to_host_path_result= - fi - ;; - esac - if test -z "$func_to_host_path_result" ; then - func_error "Could not determine host path corresponding to" - func_error " \`$1'" - func_error "Continuing, but uninstalled executables may not work." - # Fallback: - func_to_host_path_result="$1" - fi - ;; - esac - fi -} -# end: func_to_host_path - -# func_to_host_pathlist arg -# -# Convert pathlists to host format when used with build tools. -# See func_to_host_path(), above. This function supports the -# following $build/$host combinations (but does no harm for -# combinations not listed here): -# $build $host -# mingw (msys) mingw [e.g. native] -# cygwin mingw -# *nix + wine mingw -# -# Path separators are also converted from $build format to -# $host format. If ARG begins or ends with a path separator -# character, it is preserved (but converted to $host format) -# on output. -# -# ARG is a pathlist (on $build) that should be converted to -# the proper representation on $host. The result is stored -# in $func_to_host_pathlist_result. -func_to_host_pathlist () -{ - func_to_host_pathlist_result="$1" - if test -n "$1"; then - case $host in - *mingw* ) - lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g' - # Remove leading and trailing path separator characters from - # ARG. msys behavior is inconsistent here, cygpath turns them - # into '.;' and ';.', and winepath ignores them completely. - func_stripname : : "$1" - func_to_host_pathlist_tmp1=$func_stripname_result - case $build in - *mingw* ) # Actually, msys. - # Awkward: cmd appends spaces to result. - func_to_host_pathlist_result=` - ( cmd //c echo "$func_to_host_pathlist_tmp1" ) 2>/dev/null | - $SED -e 's/[ ]*$//' -e "$lt_sed_naive_backslashify"` - ;; - *cygwin* ) - func_to_host_pathlist_result=`cygpath -w -p "$func_to_host_pathlist_tmp1" | - $SED -e "$lt_sed_naive_backslashify"` - ;; - * ) - # unfortunately, winepath doesn't convert pathlists - func_to_host_pathlist_result="" - func_to_host_pathlist_oldIFS=$IFS - IFS=: - for func_to_host_pathlist_f in $func_to_host_pathlist_tmp1 ; do - IFS=$func_to_host_pathlist_oldIFS - if test -n "$func_to_host_pathlist_f" ; then - func_to_host_path "$func_to_host_pathlist_f" - if test -n "$func_to_host_path_result" ; then - if test -z "$func_to_host_pathlist_result" ; then - func_to_host_pathlist_result="$func_to_host_path_result" - else - func_append func_to_host_pathlist_result ";$func_to_host_path_result" - fi - fi - fi - done - IFS=$func_to_host_pathlist_oldIFS - ;; - esac - if test -z "$func_to_host_pathlist_result"; then - func_error "Could not determine the host path(s) corresponding to" - func_error " \`$1'" - func_error "Continuing, but uninstalled executables may not work." - # Fallback. This may break if $1 contains DOS-style drive - # specifications. The fix is not to complicate the expression - # below, but for the user to provide a working wine installation - # with winepath so that path translation in the cross-to-mingw - # case works properly. - lt_replace_pathsep_nix_to_dos="s|:|;|g" - func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp1" |\ - $SED -e "$lt_replace_pathsep_nix_to_dos"` - fi - # Now, add the leading and trailing path separators back - case "$1" in - :* ) func_to_host_pathlist_result=";$func_to_host_pathlist_result" - ;; - esac - case "$1" in - *: ) func_append func_to_host_pathlist_result ";" - ;; - esac - ;; - esac - fi -} -# end: func_to_host_pathlist - -# func_emit_cwrapperexe_src -# emit the source code for a wrapper executable on stdout -# Must ONLY be called from within func_mode_link because -# it depends on a number of variable set therein. -func_emit_cwrapperexe_src () -{ - cat < -#include -#ifdef _MSC_VER -# include -# include -# include -#else -# include -# include -# ifdef __CYGWIN__ -# include -# endif -#endif -#include -#include -#include -#include -#include -#include -#include -#include - -/* declarations of non-ANSI functions */ -#if defined(__MINGW32__) -# ifdef __STRICT_ANSI__ -int _putenv (const char *); -# endif -#elif defined(__CYGWIN__) -# ifdef __STRICT_ANSI__ -char *realpath (const char *, char *); -int putenv (char *); -int setenv (const char *, const char *, int); -# endif -/* #elif defined (other platforms) ... */ -#endif - -/* portability defines, excluding path handling macros */ -#if defined(_MSC_VER) -# define setmode _setmode -# define stat _stat -# define chmod _chmod -# define getcwd _getcwd -# define putenv _putenv -# define S_IXUSR _S_IEXEC -# ifndef _INTPTR_T_DEFINED -# define _INTPTR_T_DEFINED -# define intptr_t int -# endif -#elif defined(__MINGW32__) -# define setmode _setmode -# define stat _stat -# define chmod _chmod -# define getcwd _getcwd -# define putenv _putenv -#elif defined(__CYGWIN__) -# define HAVE_SETENV -# define FOPEN_WB "wb" -/* #elif defined (other platforms) ... */ -#endif - -#if defined(PATH_MAX) -# define LT_PATHMAX PATH_MAX -#elif defined(MAXPATHLEN) -# define LT_PATHMAX MAXPATHLEN -#else -# define LT_PATHMAX 1024 -#endif - -#ifndef S_IXOTH -# define S_IXOTH 0 -#endif -#ifndef S_IXGRP -# define S_IXGRP 0 -#endif - -/* path handling portability macros */ -#ifndef DIR_SEPARATOR -# define DIR_SEPARATOR '/' -# define PATH_SEPARATOR ':' -#endif - -#if defined (_WIN32) || defined (__MSDOS__) || defined (__DJGPP__) || \ - defined (__OS2__) -# define HAVE_DOS_BASED_FILE_SYSTEM -# define FOPEN_WB "wb" -# ifndef DIR_SEPARATOR_2 -# define DIR_SEPARATOR_2 '\\' -# endif -# ifndef PATH_SEPARATOR_2 -# define PATH_SEPARATOR_2 ';' -# endif -#endif - -#ifndef DIR_SEPARATOR_2 -# define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR) -#else /* DIR_SEPARATOR_2 */ -# define IS_DIR_SEPARATOR(ch) \ - (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2)) -#endif /* DIR_SEPARATOR_2 */ - -#ifndef PATH_SEPARATOR_2 -# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR) -#else /* PATH_SEPARATOR_2 */ -# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR_2) -#endif /* PATH_SEPARATOR_2 */ - -#ifndef FOPEN_WB -# define FOPEN_WB "w" -#endif -#ifndef _O_BINARY -# define _O_BINARY 0 -#endif - -#define XMALLOC(type, num) ((type *) xmalloc ((num) * sizeof(type))) -#define XFREE(stale) do { \ - if (stale) { free ((void *) stale); stale = 0; } \ -} while (0) - -#if defined(LT_DEBUGWRAPPER) -static int lt_debug = 1; -#else -static int lt_debug = 0; -#endif - -const char *program_name = "libtool-wrapper"; /* in case xstrdup fails */ - -void *xmalloc (size_t num); -char *xstrdup (const char *string); -const char *base_name (const char *name); -char *find_executable (const char *wrapper); -char *chase_symlinks (const char *pathspec); -int make_executable (const char *path); -int check_executable (const char *path); -char *strendzap (char *str, const char *pat); -void lt_debugprintf (const char *file, int line, const char *fmt, ...); -void lt_fatal (const char *file, int line, const char *message, ...); -static const char *nonnull (const char *s); -static const char *nonempty (const char *s); -void lt_setenv (const char *name, const char *value); -char *lt_extend_str (const char *orig_value, const char *add, int to_end); -void lt_update_exe_path (const char *name, const char *value); -void lt_update_lib_path (const char *name, const char *value); -char **prepare_spawn (char **argv); -void lt_dump_script (FILE *f); -EOF - - cat <= 0) - && (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) - return 1; - else - return 0; -} - -int -make_executable (const char *path) -{ - int rval = 0; - struct stat st; - - lt_debugprintf (__FILE__, __LINE__, "(make_executable): %s\n", - nonempty (path)); - if ((!path) || (!*path)) - return 0; - - if (stat (path, &st) >= 0) - { - rval = chmod (path, st.st_mode | S_IXOTH | S_IXGRP | S_IXUSR); - } - return rval; -} - -/* Searches for the full path of the wrapper. Returns - newly allocated full path name if found, NULL otherwise - Does not chase symlinks, even on platforms that support them. -*/ -char * -find_executable (const char *wrapper) -{ - int has_slash = 0; - const char *p; - const char *p_next; - /* static buffer for getcwd */ - char tmp[LT_PATHMAX + 1]; - int tmp_len; - char *concat_name; - - lt_debugprintf (__FILE__, __LINE__, "(find_executable): %s\n", - nonempty (wrapper)); - - if ((wrapper == NULL) || (*wrapper == '\0')) - return NULL; - - /* Absolute path? */ -#if defined (HAVE_DOS_BASED_FILE_SYSTEM) - if (isalpha ((unsigned char) wrapper[0]) && wrapper[1] == ':') - { - concat_name = xstrdup (wrapper); - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } - else - { -#endif - if (IS_DIR_SEPARATOR (wrapper[0])) - { - concat_name = xstrdup (wrapper); - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } -#if defined (HAVE_DOS_BASED_FILE_SYSTEM) - } -#endif - - for (p = wrapper; *p; p++) - if (*p == '/') - { - has_slash = 1; - break; - } - if (!has_slash) - { - /* no slashes; search PATH */ - const char *path = getenv ("PATH"); - if (path != NULL) - { - for (p = path; *p; p = p_next) - { - const char *q; - size_t p_len; - for (q = p; *q; q++) - if (IS_PATH_SEPARATOR (*q)) - break; - p_len = q - p; - p_next = (*q == '\0' ? q : q + 1); - if (p_len == 0) - { - /* empty path: current directory */ - if (getcwd (tmp, LT_PATHMAX) == NULL) - lt_fatal (__FILE__, __LINE__, "getcwd failed: %s", - nonnull (strerror (errno))); - tmp_len = strlen (tmp); - concat_name = - XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, tmp, tmp_len); - concat_name[tmp_len] = '/'; - strcpy (concat_name + tmp_len + 1, wrapper); - } - else - { - concat_name = - XMALLOC (char, p_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, p, p_len); - concat_name[p_len] = '/'; - strcpy (concat_name + p_len + 1, wrapper); - } - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } - } - /* not found in PATH; assume curdir */ - } - /* Relative path | not found in path: prepend cwd */ - if (getcwd (tmp, LT_PATHMAX) == NULL) - lt_fatal (__FILE__, __LINE__, "getcwd failed: %s", - nonnull (strerror (errno))); - tmp_len = strlen (tmp); - concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, tmp, tmp_len); - concat_name[tmp_len] = '/'; - strcpy (concat_name + tmp_len + 1, wrapper); - - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - return NULL; -} - -char * -chase_symlinks (const char *pathspec) -{ -#ifndef S_ISLNK - return xstrdup (pathspec); -#else - char buf[LT_PATHMAX]; - struct stat s; - char *tmp_pathspec = xstrdup (pathspec); - char *p; - int has_symlinks = 0; - while (strlen (tmp_pathspec) && !has_symlinks) - { - lt_debugprintf (__FILE__, __LINE__, - "checking path component for symlinks: %s\n", - tmp_pathspec); - if (lstat (tmp_pathspec, &s) == 0) - { - if (S_ISLNK (s.st_mode) != 0) - { - has_symlinks = 1; - break; - } - - /* search backwards for last DIR_SEPARATOR */ - p = tmp_pathspec + strlen (tmp_pathspec) - 1; - while ((p > tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) - p--; - if ((p == tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) - { - /* no more DIR_SEPARATORS left */ - break; - } - *p = '\0'; - } - else - { - lt_fatal (__FILE__, __LINE__, - "error accessing file \"%s\": %s", - tmp_pathspec, nonnull (strerror (errno))); - } - } - XFREE (tmp_pathspec); - - if (!has_symlinks) - { - return xstrdup (pathspec); - } - - tmp_pathspec = realpath (pathspec, buf); - if (tmp_pathspec == 0) - { - lt_fatal (__FILE__, __LINE__, - "could not follow symlinks for %s", pathspec); - } - return xstrdup (tmp_pathspec); -#endif -} - -char * -strendzap (char *str, const char *pat) -{ - size_t len, patlen; - - assert (str != NULL); - assert (pat != NULL); - - len = strlen (str); - patlen = strlen (pat); - - if (patlen <= len) - { - str += len - patlen; - if (strcmp (str, pat) == 0) - *str = '\0'; - } - return str; -} - -void -lt_debugprintf (const char *file, int line, const char *fmt, ...) -{ - va_list args; - if (lt_debug) - { - (void) fprintf (stderr, "%s:%s:%d: ", program_name, file, line); - va_start (args, fmt); - (void) vfprintf (stderr, fmt, args); - va_end (args); - } -} - -static void -lt_error_core (int exit_status, const char *file, - int line, const char *mode, - const char *message, va_list ap) -{ - fprintf (stderr, "%s:%s:%d: %s: ", program_name, file, line, mode); - vfprintf (stderr, message, ap); - fprintf (stderr, ".\n"); - - if (exit_status >= 0) - exit (exit_status); -} - -void -lt_fatal (const char *file, int line, const char *message, ...) -{ - va_list ap; - va_start (ap, message); - lt_error_core (EXIT_FAILURE, file, line, "FATAL", message, ap); - va_end (ap); -} - -static const char * -nonnull (const char *s) -{ - return s ? s : "(null)"; -} - -static const char * -nonempty (const char *s) -{ - return (s && !*s) ? "(empty)" : nonnull (s); -} - -void -lt_setenv (const char *name, const char *value) -{ - lt_debugprintf (__FILE__, __LINE__, - "(lt_setenv) setting '%s' to '%s'\n", - nonnull (name), nonnull (value)); - { -#ifdef HAVE_SETENV - /* always make a copy, for consistency with !HAVE_SETENV */ - char *str = xstrdup (value); - setenv (name, str, 1); -#else - int len = strlen (name) + 1 + strlen (value) + 1; - char *str = XMALLOC (char, len); - sprintf (str, "%s=%s", name, value); - if (putenv (str) != EXIT_SUCCESS) - { - XFREE (str); - } -#endif - } -} - -char * -lt_extend_str (const char *orig_value, const char *add, int to_end) -{ - char *new_value; - if (orig_value && *orig_value) - { - int orig_value_len = strlen (orig_value); - int add_len = strlen (add); - new_value = XMALLOC (char, add_len + orig_value_len + 1); - if (to_end) - { - strcpy (new_value, orig_value); - strcpy (new_value + orig_value_len, add); - } - else - { - strcpy (new_value, add); - strcpy (new_value + add_len, orig_value); - } - } - else - { - new_value = xstrdup (add); - } - return new_value; -} - -void -lt_update_exe_path (const char *name, const char *value) -{ - lt_debugprintf (__FILE__, __LINE__, - "(lt_update_exe_path) modifying '%s' by prepending '%s'\n", - nonnull (name), nonnull (value)); - - if (name && *name && value && *value) - { - char *new_value = lt_extend_str (getenv (name), value, 0); - /* some systems can't cope with a ':'-terminated path #' */ - int len = strlen (new_value); - while (((len = strlen (new_value)) > 0) && IS_PATH_SEPARATOR (new_value[len-1])) - { - new_value[len-1] = '\0'; - } - lt_setenv (name, new_value); - XFREE (new_value); - } -} - -void -lt_update_lib_path (const char *name, const char *value) -{ - lt_debugprintf (__FILE__, __LINE__, - "(lt_update_lib_path) modifying '%s' by prepending '%s'\n", - nonnull (name), nonnull (value)); - - if (name && *name && value && *value) - { - char *new_value = lt_extend_str (getenv (name), value, 0); - lt_setenv (name, new_value); - XFREE (new_value); - } -} - -EOF - case $host_os in - mingw*) - cat <<"EOF" - -/* Prepares an argument vector before calling spawn(). - Note that spawn() does not by itself call the command interpreter - (getenv ("COMSPEC") != NULL ? getenv ("COMSPEC") : - ({ OSVERSIONINFO v; v.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); - GetVersionEx(&v); - v.dwPlatformId == VER_PLATFORM_WIN32_NT; - }) ? "cmd.exe" : "command.com"). - Instead it simply concatenates the arguments, separated by ' ', and calls - CreateProcess(). We must quote the arguments since Win32 CreateProcess() - interprets characters like ' ', '\t', '\\', '"' (but not '<' and '>') in a - special way: - - Space and tab are interpreted as delimiters. They are not treated as - delimiters if they are surrounded by double quotes: "...". - - Unescaped double quotes are removed from the input. Their only effect is - that within double quotes, space and tab are treated like normal - characters. - - Backslashes not followed by double quotes are not special. - - But 2*n+1 backslashes followed by a double quote become - n backslashes followed by a double quote (n >= 0): - \" -> " - \\\" -> \" - \\\\\" -> \\" - */ -#define SHELL_SPECIAL_CHARS "\"\\ \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" -#define SHELL_SPACE_CHARS " \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" -char ** -prepare_spawn (char **argv) -{ - size_t argc; - char **new_argv; - size_t i; - - /* Count number of arguments. */ - for (argc = 0; argv[argc] != NULL; argc++) - ; - - /* Allocate new argument vector. */ - new_argv = XMALLOC (char *, argc + 1); - - /* Put quoted arguments into the new argument vector. */ - for (i = 0; i < argc; i++) - { - const char *string = argv[i]; - - if (string[0] == '\0') - new_argv[i] = xstrdup ("\"\""); - else if (strpbrk (string, SHELL_SPECIAL_CHARS) != NULL) - { - int quote_around = (strpbrk (string, SHELL_SPACE_CHARS) != NULL); - size_t length; - unsigned int backslashes; - const char *s; - char *quoted_string; - char *p; - - length = 0; - backslashes = 0; - if (quote_around) - length++; - for (s = string; *s != '\0'; s++) - { - char c = *s; - if (c == '"') - length += backslashes + 1; - length++; - if (c == '\\') - backslashes++; - else - backslashes = 0; - } - if (quote_around) - length += backslashes + 1; - - quoted_string = XMALLOC (char, length + 1); - - p = quoted_string; - backslashes = 0; - if (quote_around) - *p++ = '"'; - for (s = string; *s != '\0'; s++) - { - char c = *s; - if (c == '"') - { - unsigned int j; - for (j = backslashes + 1; j > 0; j--) - *p++ = '\\'; - } - *p++ = c; - if (c == '\\') - backslashes++; - else - backslashes = 0; - } - if (quote_around) - { - unsigned int j; - for (j = backslashes; j > 0; j--) - *p++ = '\\'; - *p++ = '"'; - } - *p = '\0'; - - new_argv[i] = quoted_string; - } - else - new_argv[i] = (char *) string; - } - new_argv[argc] = NULL; - - return new_argv; -} -EOF - ;; - esac - - cat <<"EOF" -void lt_dump_script (FILE* f) -{ -EOF - func_emit_wrapper yes | - $SED -e 's/\([\\"]\)/\\\1/g' \ - -e 's/^/ fputs ("/' -e 's/$/\\n", f);/' - - cat <<"EOF" -} -EOF -} -# end: func_emit_cwrapperexe_src - -# func_win32_import_lib_p ARG -# True if ARG is an import lib, as indicated by $file_magic_cmd -func_win32_import_lib_p () -{ - $opt_debug - case `eval $file_magic_cmd \"\$1\" 2>/dev/null | $SED -e 10q` in - *import*) : ;; - *) false ;; - esac -} - -# func_mode_link arg... -func_mode_link () -{ - $opt_debug - case $host in - *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) - # It is impossible to link a dll without this setting, and - # we shouldn't force the makefile maintainer to figure out - # which system we are compiling for in order to pass an extra - # flag for every libtool invocation. - # allow_undefined=no - - # FIXME: Unfortunately, there are problems with the above when trying - # to make a dll which has undefined symbols, in which case not - # even a static library is built. For now, we need to specify - # -no-undefined on the libtool link line when we can be certain - # that all symbols are satisfied, otherwise we get a static library. - allow_undefined=yes - ;; - *) - allow_undefined=yes - ;; - esac - libtool_args=$nonopt - base_compile="$nonopt $@" - compile_command=$nonopt - finalize_command=$nonopt - - compile_rpath= - finalize_rpath= - compile_shlibpath= - finalize_shlibpath= - convenience= - old_convenience= - deplibs= - old_deplibs= - compiler_flags= - linker_flags= - dllsearchpath= - lib_search_path=`pwd` - inst_prefix_dir= - new_inherited_linker_flags= - - avoid_version=no - bindir= - dlfiles= - dlprefiles= - dlself=no - export_dynamic=no - export_symbols= - export_symbols_regex= - generated= - libobjs= - ltlibs= - module=no - no_install=no - objs= - non_pic_objects= - precious_files_regex= - prefer_static_libs=no - preload=no - prev= - prevarg= - release= - rpath= - xrpath= - perm_rpath= - temp_rpath= - thread_safe=no - vinfo= - vinfo_number=no - weak_libs= - single_module="${wl}-single_module" - func_infer_tag $base_compile - - # We need to know -static, to get the right output filenames. - for arg - do - case $arg in - -shared) - test "$build_libtool_libs" != yes && \ - func_fatal_configuration "can not build a shared library" - build_old_libs=no - break - ;; - -all-static | -static | -static-libtool-libs) - case $arg in - -all-static) - if test "$build_libtool_libs" = yes && test -z "$link_static_flag"; then - func_warning "complete static linking is impossible in this configuration" - fi - if test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=yes - ;; - -static) - if test -z "$pic_flag" && test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=built - ;; - -static-libtool-libs) - if test -z "$pic_flag" && test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=yes - ;; - esac - build_libtool_libs=no - build_old_libs=yes - break - ;; - esac - done - - # See if our shared archives depend on static archives. - test -n "$old_archive_from_new_cmds" && build_old_libs=yes - - # Go through the arguments, transforming them on the way. - while test "$#" -gt 0; do - arg="$1" - shift - func_quote_for_eval "$arg" - qarg=$func_quote_for_eval_unquoted_result - func_append libtool_args " $func_quote_for_eval_result" - - # If the previous option needs an argument, assign it. - if test -n "$prev"; then - case $prev in - output) - func_append compile_command " @OUTPUT@" - func_append finalize_command " @OUTPUT@" - ;; - esac - - case $prev in - bindir) - bindir="$arg" - prev= - continue - ;; - dlfiles|dlprefiles) - if test "$preload" = no; then - # Add the symbol object into the linking commands. - func_append compile_command " @SYMFILE@" - func_append finalize_command " @SYMFILE@" - preload=yes - fi - case $arg in - *.la | *.lo) ;; # We handle these cases below. - force) - if test "$dlself" = no; then - dlself=needless - export_dynamic=yes - fi - prev= - continue - ;; - self) - if test "$prev" = dlprefiles; then - dlself=yes - elif test "$prev" = dlfiles && test "$dlopen_self" != yes; then - dlself=yes - else - dlself=needless - export_dynamic=yes - fi - prev= - continue - ;; - *) - if test "$prev" = dlfiles; then - dlfiles="$dlfiles $arg" - else - dlprefiles="$dlprefiles $arg" - fi - prev= - continue - ;; - esac - ;; - expsyms) - export_symbols="$arg" - test -f "$arg" \ - || func_fatal_error "symbol file \`$arg' does not exist" - prev= - continue - ;; - expsyms_regex) - export_symbols_regex="$arg" - prev= - continue - ;; - framework) - case $host in - *-*-darwin*) - case "$deplibs " in - *" $qarg.ltframework "*) ;; - *) deplibs="$deplibs $qarg.ltframework" # this is fixed later - ;; - esac - ;; - esac - prev= - continue - ;; - inst_prefix) - inst_prefix_dir="$arg" - prev= - continue - ;; - objectlist) - if test -f "$arg"; then - save_arg=$arg - moreargs= - for fil in `cat "$save_arg"` - do -# moreargs="$moreargs $fil" - arg=$fil - # A libtool-controlled object. - - # Check to see that this really is a libtool object. - if func_lalib_unsafe_p "$arg"; then - pic_object= - non_pic_object= - - # Read the .lo file - func_source "$arg" - - if test -z "$pic_object" || - test -z "$non_pic_object" || - test "$pic_object" = none && - test "$non_pic_object" = none; then - func_fatal_error "cannot find name of object for \`$arg'" - fi - - # Extract subdirectory from the argument. - func_dirname "$arg" "/" "" - xdir="$func_dirname_result" - - if test "$pic_object" != none; 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then - case "$new_inherited_linker_flags " in - *" $deplib "*) ;; - * ) new_inherited_linker_flags="$new_inherited_linker_flags $deplib" ;; - esac - fi - fi - continue - ;; - -l*) - if test "$linkmode" != lib && test "$linkmode" != prog; then - func_warning "\`-l' is ignored for archives/objects" - continue - fi - func_stripname '-l' '' "$deplib" - name=$func_stripname_result - if test "$linkmode" = lib; then - searchdirs="$newlib_search_path $lib_search_path $compiler_lib_search_dirs $sys_lib_search_path $shlib_search_path" - else - searchdirs="$newlib_search_path $lib_search_path $sys_lib_search_path $shlib_search_path" - fi - for searchdir in $searchdirs; do - for search_ext in .la $std_shrext .so .a; do - # Search the libtool library - lib="$searchdir/lib${name}${search_ext}" - if test -f "$lib"; then - if test "$search_ext" = ".la"; then - found=yes - else - found=no - fi - break 2 - fi - done - done - if test "$found" != yes; then - # deplib doesn't seem to be a libtool library - if test "$linkmode,$pass" = "prog,link"; 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- *) ;; - esac - fi - fi - ;; # -l - *.ltframework) - if test "$linkmode,$pass" = "prog,link"; then - compile_deplibs="$deplib $compile_deplibs" - finalize_deplibs="$deplib $finalize_deplibs" - else - deplibs="$deplib $deplibs" - if test "$linkmode" = lib ; then - case "$new_inherited_linker_flags " in - *" $deplib "*) ;; - * ) new_inherited_linker_flags="$new_inherited_linker_flags $deplib" ;; - esac - fi - fi - continue - ;; - -L*) - case $linkmode in - lib) - deplibs="$deplib $deplibs" - test "$pass" = conv && continue - newdependency_libs="$deplib $newdependency_libs" - func_stripname '-L' '' "$deplib" - newlib_search_path="$newlib_search_path $func_stripname_result" - ;; - prog) - if test "$pass" = conv; then - deplibs="$deplib $deplibs" - continue - fi - if test "$pass" = scan; then - deplibs="$deplib $deplibs" - else - compile_deplibs="$deplib $compile_deplibs" - finalize_deplibs="$deplib $finalize_deplibs" - fi - func_stripname '-L' '' "$deplib" - newlib_search_path="$newlib_search_path $func_stripname_result" - ;; 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- *) finalize_rpath="$finalize_rpath $libdir" - esac - ;; - esac - fi - - if test -n "$old_archive_from_expsyms_cmds"; then - # figure out the soname - set dummy $library_names - shift - realname="$1" - shift - libname=`eval "\\$ECHO \"$libname_spec\""` - # use dlname if we got it. it's perfectly good, no? - if test -n "$dlname"; then - soname="$dlname" - elif test -n "$soname_spec"; then - # bleh windows - case $host in - *cygwin* | mingw* | *cegcc*) - func_arith $current - $age - major=$func_arith_result - versuffix="-$major" - ;; - esac - eval soname=\"$soname_spec\" - else - soname="$realname" - fi - - # Make a new name for the extract_expsyms_cmds to use - soroot="$soname" - func_basename "$soroot" - soname="$func_basename_result" - func_stripname 'lib' '.dll' "$soname" - newlib=libimp-$func_stripname_result.a - - # If the library has no export list, then create one now - if test -f "$output_objdir/$soname-def"; then : - else - func_verbose "extracting exported symbol list from \`$soname'" - func_execute_cmds "$extract_expsyms_cmds" 'exit $?' - fi - - # Create $newlib - if test -f "$output_objdir/$newlib"; then :; else - func_verbose "generating import library for \`$soname'" - func_execute_cmds "$old_archive_from_expsyms_cmds" 'exit $?' - fi - # make sure the library variables are pointing to the new library - dir=$output_objdir - linklib=$newlib - fi # test -n "$old_archive_from_expsyms_cmds" - - if test "$linkmode" = prog || test "$mode" != relink; then - add_shlibpath= - add_dir= - add= - lib_linked=yes - case $hardcode_action in - immediate | unsupported) - if test "$hardcode_direct" = no; then - add="$dir/$linklib" - case $host in - *-*-sco3.2v5.0.[024]*) add_dir="-L$dir" ;; - *-*-sysv4*uw2*) add_dir="-L$dir" ;; - *-*-sysv5OpenUNIX* | *-*-sysv5UnixWare7.[01].[10]* | \ - *-*-unixware7*) add_dir="-L$dir" ;; - *-*-darwin* ) - # if the lib is a (non-dlopened) module then we can not - # link against it, someone is ignoring the earlier warnings - if /usr/bin/file -L $add 2> /dev/null | - $GREP ": [^:]* bundle" >/dev/null ; then - if test "X$dlopenmodule" != "X$lib"; then - $ECHO "*** Warning: lib $linklib is a module, not a shared library" - if test -z "$old_library" ; 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- *) lib_linked=no ;; - esac - - if test "$lib_linked" != yes; then - func_fatal_configuration "unsupported hardcode properties" - fi - - if test -n "$add_shlibpath"; then - case :$compile_shlibpath: in - *":$add_shlibpath:"*) ;; - *) compile_shlibpath="$compile_shlibpath$add_shlibpath:" ;; - esac - fi - if test "$linkmode" = prog; then - test -n "$add_dir" && compile_deplibs="$add_dir $compile_deplibs" - test -n "$add" && compile_deplibs="$add $compile_deplibs" - else - test -n "$add_dir" && deplibs="$add_dir $deplibs" - test -n "$add" && deplibs="$add $deplibs" - if test "$hardcode_direct" != yes && - test "$hardcode_minus_L" != yes && - test "$hardcode_shlibpath_var" = yes; then - case :$finalize_shlibpath: in - *":$libdir:"*) ;; - *) finalize_shlibpath="$finalize_shlibpath$libdir:" ;; - esac - fi - fi - fi - - if test "$linkmode" = prog || test "$mode" = relink; then - add_shlibpath= - add_dir= - add= - # Finalize command for both is simple: just hardcode it. - if test "$hardcode_direct" = yes && - test "$hardcode_direct_absolute" = no; then - add="$libdir/$linklib" - elif test "$hardcode_minus_L" = yes; then - add_dir="-L$libdir" - add="-l$name" - elif test "$hardcode_shlibpath_var" = yes; then - case :$finalize_shlibpath: in - *":$libdir:"*) ;; - *) finalize_shlibpath="$finalize_shlibpath$libdir:" ;; - esac - add="-l$name" - elif test "$hardcode_automatic" = yes; then - if test -n "$inst_prefix_dir" && - test -f "$inst_prefix_dir$libdir/$linklib" ; then - add="$inst_prefix_dir$libdir/$linklib" - else - add="$libdir/$linklib" - fi - else - # We cannot seem to hardcode it, guess we'll fake it. - add_dir="-L$libdir" - # Try looking first in the location we're being installed to. - if test -n "$inst_prefix_dir"; then - case $libdir in - [\\/]*) - add_dir="$add_dir -L$inst_prefix_dir$libdir" - ;; - esac - fi - add="-l$name" - fi - - if test "$linkmode" = prog; then - test -n "$add_dir" && finalize_deplibs="$add_dir $finalize_deplibs" - test -n "$add" && finalize_deplibs="$add $finalize_deplibs" - else - test -n "$add_dir" && deplibs="$add_dir $deplibs" - test -n "$add" && deplibs="$add $deplibs" - fi - fi - elif test "$linkmode" = prog; then - # Here we assume that one of hardcode_direct or hardcode_minus_L - # is not unsupported. 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So, this module is probably useless." - echo "*** \`nm' from GNU binutils and a full rebuild may help." - fi - if test "$build_old_libs" = no; then - build_libtool_libs=module - build_old_libs=yes - else - build_libtool_libs=no - fi - fi - else - deplibs="$dir/$old_library $deplibs" - link_static=yes - fi - fi # link shared/static library? - - if test "$linkmode" = lib; then - if test -n "$dependency_libs" && - { test "$hardcode_into_libs" != yes || - test "$build_old_libs" = yes || - test "$link_static" = yes; }; then - # Extract -R from dependency_libs - temp_deplibs= - for libdir in $dependency_libs; do - case $libdir in - -R*) func_stripname '-R' '' "$libdir" - temp_xrpath=$func_stripname_result - case " $xrpath " in - *" $temp_xrpath "*) ;; - *) xrpath="$xrpath $temp_xrpath";; - esac;; - *) temp_deplibs="$temp_deplibs $libdir";; - esac - done - dependency_libs="$temp_deplibs" - fi - - newlib_search_path="$newlib_search_path $absdir" - # Link against this library - test "$link_static" = no && newdependency_libs="$abs_ladir/$laname $newdependency_libs" - # ... and its dependency_libs - tmp_libs= - for deplib in $dependency_libs; do - newdependency_libs="$deplib $newdependency_libs" - if $opt_duplicate_deps ; then - case "$tmp_libs " in - *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;; - esac - fi - tmp_libs="$tmp_libs $deplib" - done - - if test "$link_all_deplibs" != no; then - # Add the search paths of all dependency libraries - for deplib in $dependency_libs; do - path= - case $deplib in - -L*) path="$deplib" ;; - *.la) - func_dirname "$deplib" "" "." - dir="$func_dirname_result" - # We need an absolute path. - case $dir in - [\\/]* | [A-Za-z]:[\\/]*) absdir="$dir" ;; - *) - absdir=`cd "$dir" && pwd` - if test -z "$absdir"; then - func_warning "cannot determine absolute directory name of \`$dir'" - absdir="$dir" - fi - ;; - esac - if $GREP "^installed=no" $deplib > /dev/null; then - case $host in - *-*-darwin*) - depdepl= - eval deplibrary_names=`${SED} -n -e 's/^library_names=\(.*\)$/\1/p' $deplib` - if test -n "$deplibrary_names" ; then - for tmp in $deplibrary_names ; do - depdepl=$tmp - done - if test -f "$absdir/$objdir/$depdepl" ; then - depdepl="$absdir/$objdir/$depdepl" - darwin_install_name=`${OTOOL} -L $depdepl | awk '{if (NR == 2) {print $1;exit}}'` - if test -z "$darwin_install_name"; then - darwin_install_name=`${OTOOL64} -L $depdepl | awk '{if (NR == 2) {print $1;exit}}'` - fi - compiler_flags="$compiler_flags ${wl}-dylib_file ${wl}${darwin_install_name}:${depdepl}" - linker_flags="$linker_flags -dylib_file ${darwin_install_name}:${depdepl}" - path= - fi - fi - ;; - *) - path="-L$absdir/$objdir" - ;; - esac - else - eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $deplib` - test -z "$libdir" && \ - func_fatal_error "\`$deplib' is not a valid libtool archive" - test "$absdir" != "$libdir" && \ - func_warning "\`$deplib' seems to be moved" - - path="-L$absdir" - fi - ;; - esac - case " $deplibs " in - *" $path "*) ;; - *) deplibs="$path $deplibs" ;; - esac - done - fi # link_all_deplibs != no - fi # linkmode = lib - done # for deplib in $libs - if test "$pass" = link; then - if test "$linkmode" = "prog"; then - compile_deplibs="$new_inherited_linker_flags $compile_deplibs" - finalize_deplibs="$new_inherited_linker_flags $finalize_deplibs" - else - compiler_flags="$compiler_flags "`$ECHO " $new_inherited_linker_flags" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` - fi - fi - dependency_libs="$newdependency_libs" - if test "$pass" = dlpreopen; then - # Link the dlpreopened libraries before other libraries - for deplib in $save_deplibs; do - deplibs="$deplib $deplibs" - done - fi - if test "$pass" != dlopen; then - if test "$pass" != conv; then - # Make sure lib_search_path contains only unique directories. - lib_search_path= - for dir in $newlib_search_path; do - case "$lib_search_path " in - *" $dir "*) ;; - *) lib_search_path="$lib_search_path $dir" ;; - esac - done - newlib_search_path= - fi - - if test "$linkmode,$pass" != "prog,link"; then - vars="deplibs" - else - vars="compile_deplibs finalize_deplibs" - fi - for var in $vars dependency_libs; do - # Add libraries to $var in reverse order - eval tmp_libs=\"\$$var\" - new_libs= - for deplib in $tmp_libs; do - # FIXME: Pedantically, this is the right thing to do, so - # that some nasty dependency loop isn't accidentally - # broken: - #new_libs="$deplib $new_libs" - # Pragmatically, this seems to cause very few problems in - # practice: - case $deplib in - -L*) new_libs="$deplib $new_libs" ;; - -R*) ;; - *) - # And here is the reason: when a library appears more - # than once as an explicit dependence of a library, or - # is implicitly linked in more than once by the - # compiler, it is considered special, and multiple - # occurrences thereof are not removed. 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GNU sed should be fine - # though. Also, the filter scales superlinearly with the number of - # global variables. join(1) would be nice here, but unfortunately - # isn't a blessed tool. - $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter - delfiles="$delfiles $export_symbols $output_objdir/$libname.filter" - export_symbols=$output_objdir/$libname.def - $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols - fi - fi - - libobjs=$output - # Restore the value of output. - output=$save_output - - if test -n "$convenience" && test -n "$whole_archive_flag_spec"; then - eval libobjs=\"\$libobjs $whole_archive_flag_spec\" - test "X$libobjs" = "X " && libobjs= - fi - # Expand the library linking commands again to reset the - # value of $libobjs for piecewise linking. - - # Do each of the archive commands. - if test "$module" = yes && test -n "$module_cmds" ; then - if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then - cmds=$module_expsym_cmds - else - cmds=$module_cmds - fi - else - if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then - cmds=$archive_expsym_cmds - else - cmds=$archive_cmds - fi - fi - fi - - if test -n "$delfiles"; then - # Append the command to remove temporary files to $cmds. - eval cmds=\"\$cmds~\$RM $delfiles\" - fi - - # Add any objects from preloaded convenience libraries - if test -n "$dlprefiles"; then - gentop="$output_objdir/${outputname}x" - generated="$generated $gentop" - - func_extract_archives $gentop $dlprefiles - libobjs="$libobjs $func_extract_archives_result" - test "X$libobjs" = "X " && libobjs= - fi - - save_ifs="$IFS"; IFS='~' - for cmd in $cmds; do - IFS="$save_ifs" - eval cmd=\"$cmd\" - $opt_silent || { - func_quote_for_expand "$cmd" - eval "func_echo $func_quote_for_expand_result" - } - $opt_dry_run || eval "$cmd" || { - lt_exit=$? - - # Restore the uninstalled library and exit - if test "$mode" = relink; then - ( cd "$output_objdir" && \ - $RM "${realname}T" && \ - $MV "${realname}U" "$realname" ) - fi - - exit $lt_exit - } - done - IFS="$save_ifs" - - # Restore the uninstalled library and exit - if test "$mode" = relink; then - $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}T && $MV $realname ${realname}T && $MV ${realname}U $realname)' || exit $? - - if test -n "$convenience"; then - if test -z "$whole_archive_flag_spec"; then - func_show_eval '${RM}r "$gentop"' - fi - fi - - exit $EXIT_SUCCESS - fi - - # Create links to the real library. - for linkname in $linknames; do - if test "$realname" != "$linkname"; then - func_show_eval '(cd "$output_objdir" && $RM "$linkname" && $LN_S "$realname" "$linkname")' 'exit $?' - fi - done - - # If -module or -export-dynamic was specified, set the dlname. - if test "$module" = yes || test "$export_dynamic" = yes; then - # On all known operating systems, these are identical. - dlname="$soname" - fi - fi - ;; - - obj) - if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then - func_warning "\`-dlopen' is ignored for objects" - fi - - case " $deplibs" in - *\ -l* | *\ -L*) - func_warning "\`-l' and \`-L' are ignored for objects" ;; - esac - - test -n "$rpath" && \ - func_warning "\`-rpath' is ignored for objects" - - test -n "$xrpath" && \ - func_warning "\`-R' is ignored for objects" - - test -n "$vinfo" && \ - func_warning "\`-version-info' is ignored for objects" - - test -n "$release" && \ - func_warning "\`-release' is ignored for objects" - - case $output in - *.lo) - test -n "$objs$old_deplibs" && \ - func_fatal_error "cannot build library object \`$output' from non-libtool objects" - - libobj=$output - func_lo2o "$libobj" - obj=$func_lo2o_result - ;; - *) - libobj= - obj="$output" - ;; - esac - - # Delete the old objects. - $opt_dry_run || $RM $obj $libobj - - # Objects from convenience libraries. This assumes - # single-version convenience libraries. Whenever we create - # different ones for PIC/non-PIC, this we'll have to duplicate - # the extraction. - reload_conv_objs= - gentop= - # reload_cmds runs $LD directly, so let us get rid of - # -Wl from whole_archive_flag_spec and hope we can get by with - # turning comma into space.. - wl= - - if test -n "$convenience"; then - if test -n "$whole_archive_flag_spec"; then - eval tmp_whole_archive_flags=\"$whole_archive_flag_spec\" - reload_conv_objs=$reload_objs\ `$ECHO "$tmp_whole_archive_flags" | $SED 's|,| |g'` - else - gentop="$output_objdir/${obj}x" - generated="$generated $gentop" - - func_extract_archives $gentop $convenience - reload_conv_objs="$reload_objs $func_extract_archives_result" - fi - fi - - # Create the old-style object. - reload_objs="$objs$old_deplibs "`$ECHO "$libobjs" | $SP2NL | $SED "/\.${libext}$/d; /\.lib$/d; $lo2o" | $NL2SP`" $reload_conv_objs" ### testsuite: skip nested quoting test - - output="$obj" - func_execute_cmds "$reload_cmds" 'exit $?' - - # Exit if we aren't doing a library object file. - if test -z "$libobj"; then - if test -n "$gentop"; then - func_show_eval '${RM}r "$gentop"' - fi - - exit $EXIT_SUCCESS - fi - - if test "$build_libtool_libs" != yes; then - if test -n "$gentop"; then - func_show_eval '${RM}r "$gentop"' - fi - - # Create an invalid libtool object if no PIC, so that we don't - # accidentally link it into a program. - # $show "echo timestamp > $libobj" - # $opt_dry_run || eval "echo timestamp > $libobj" || exit $? - exit $EXIT_SUCCESS - fi - - if test -n "$pic_flag" || test "$pic_mode" != default; then - # Only do commands if we really have different PIC objects. - reload_objs="$libobjs $reload_conv_objs" - output="$libobj" - func_execute_cmds "$reload_cmds" 'exit $?' - fi - - if test -n "$gentop"; then - func_show_eval '${RM}r "$gentop"' - fi - - exit $EXIT_SUCCESS - ;; - - prog) - case $host in - *cygwin*) func_stripname '' '.exe' "$output" - output=$func_stripname_result.exe;; - esac - test -n "$vinfo" && \ - func_warning "\`-version-info' is ignored for programs" - - test -n "$release" && \ - func_warning "\`-release' is ignored for programs" - - test "$preload" = yes \ - && test "$dlopen_support" = unknown \ - && test "$dlopen_self" = unknown \ - && test "$dlopen_self_static" = unknown && \ - func_warning "\`LT_INIT([dlopen])' not used. Assuming no dlopen support." - - case $host in - *-*-rhapsody* | *-*-darwin1.[012]) - # On Rhapsody replace the C library is the System framework - compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's/ -lc / System.ltframework /'` - finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's/ -lc / System.ltframework /'` - ;; - esac - - case $host in - *-*-darwin*) - # Don't allow lazy linking, it breaks C++ global constructors - # But is supposedly fixed on 10.4 or later (yay!). - if test "$tagname" = CXX ; then - case ${MACOSX_DEPLOYMENT_TARGET-10.0} in - 10.[0123]) - compile_command="$compile_command ${wl}-bind_at_load" - finalize_command="$finalize_command ${wl}-bind_at_load" - ;; - esac - fi - # Time to change all our "foo.ltframework" stuff back to "-framework foo" - compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` - finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` - ;; - esac - - - # move library search paths that coincide with paths to not yet - # installed libraries to the beginning of the library search list - new_libs= - for path in $notinst_path; do - case " $new_libs " in - *" -L$path/$objdir "*) ;; - *) - case " $compile_deplibs " in - *" -L$path/$objdir "*) - new_libs="$new_libs -L$path/$objdir" ;; - esac - ;; - esac - done - for deplib in $compile_deplibs; do - case $deplib in - -L*) - case " $new_libs " in - *" $deplib "*) ;; - *) new_libs="$new_libs $deplib" ;; - esac - ;; - *) new_libs="$new_libs $deplib" ;; - esac - done - compile_deplibs="$new_libs" - - - compile_command="$compile_command $compile_deplibs" - finalize_command="$finalize_command $finalize_deplibs" - - if test -n "$rpath$xrpath"; then - # If the user specified any rpath flags, then add them. - for libdir in $rpath $xrpath; do - # This is the magic to use -rpath. - case "$finalize_rpath " in - *" $libdir "*) ;; - *) finalize_rpath="$finalize_rpath $libdir" ;; - esac - done - fi - - # Now hardcode the library paths - rpath= - hardcode_libdirs= - for libdir in $compile_rpath $finalize_rpath; do - if test -n "$hardcode_libdir_flag_spec"; then - if test -n "$hardcode_libdir_separator"; then - if test -z "$hardcode_libdirs"; then - hardcode_libdirs="$libdir" - else - # Just accumulate the unique libdirs. - case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in - *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*) - ;; - *) - hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir" - ;; - esac - fi - else - eval flag=\"$hardcode_libdir_flag_spec\" - rpath="$rpath $flag" - fi - elif test -n "$runpath_var"; then - case "$perm_rpath " in - *" $libdir "*) ;; - *) perm_rpath="$perm_rpath $libdir" ;; - esac - fi - case $host in - *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) - testbindir=`${ECHO} "$libdir" | ${SED} -e 's*/lib$*/bin*'` - case :$dllsearchpath: in - *":$libdir:"*) ;; - ::) dllsearchpath=$libdir;; - *) dllsearchpath="$dllsearchpath:$libdir";; - esac - case :$dllsearchpath: in - *":$testbindir:"*) ;; - ::) dllsearchpath=$testbindir;; - *) dllsearchpath="$dllsearchpath:$testbindir";; - esac - ;; - esac - done - # Substitute the hardcoded libdirs into the rpath. - if test -n "$hardcode_libdir_separator" && - test -n "$hardcode_libdirs"; then - libdir="$hardcode_libdirs" - eval rpath=\" $hardcode_libdir_flag_spec\" - fi - compile_rpath="$rpath" - - rpath= - hardcode_libdirs= - for libdir in $finalize_rpath; do - if test -n "$hardcode_libdir_flag_spec"; then - if test -n "$hardcode_libdir_separator"; then - if test -z "$hardcode_libdirs"; then - hardcode_libdirs="$libdir" - else - # Just accumulate the unique libdirs. - case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in - *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*) - ;; - *) - hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir" - ;; - esac - fi - else - eval flag=\"$hardcode_libdir_flag_spec\" - rpath="$rpath $flag" - fi - elif test -n "$runpath_var"; then - case "$finalize_perm_rpath " in - *" $libdir "*) ;; - *) finalize_perm_rpath="$finalize_perm_rpath $libdir" ;; - esac - fi - done - # Substitute the hardcoded libdirs into the rpath. - if test -n "$hardcode_libdir_separator" && - test -n "$hardcode_libdirs"; then - libdir="$hardcode_libdirs" - eval rpath=\" $hardcode_libdir_flag_spec\" - fi - finalize_rpath="$rpath" - - if test -n "$libobjs" && test "$build_old_libs" = yes; then - # Transform all the library objects into standard objects. - compile_command=`$ECHO "$compile_command" | $SP2NL | $SED "$lo2o" | $NL2SP` - finalize_command=`$ECHO "$finalize_command" | $SP2NL | $SED "$lo2o" | $NL2SP` - fi - - func_generate_dlsyms "$outputname" "@PROGRAM@" "no" - - # template prelinking step - if test -n "$prelink_cmds"; then - func_execute_cmds "$prelink_cmds" 'exit $?' - fi - - wrappers_required=yes - case $host in - *cegcc* | *mingw32ce*) - # Disable wrappers for cegcc and mingw32ce hosts, we are cross compiling anyway. - wrappers_required=no - ;; - *cygwin* | *mingw* ) - if test "$build_libtool_libs" != yes; then - wrappers_required=no - fi - ;; - *) - if test "$need_relink" = no || test "$build_libtool_libs" != yes; then - wrappers_required=no - fi - ;; - esac - if test "$wrappers_required" = no; then - # Replace the output file specification. - compile_command=`$ECHO "$compile_command" | $SED 's%@OUTPUT@%'"$output"'%g'` - link_command="$compile_command$compile_rpath" - - # We have no uninstalled library dependencies, so finalize right now. - exit_status=0 - func_show_eval "$link_command" 'exit_status=$?' - - # Delete the generated files. - if test -f "$output_objdir/${outputname}S.${objext}"; then - func_show_eval '$RM "$output_objdir/${outputname}S.${objext}"' - fi - - exit $exit_status - fi - - if test -n "$compile_shlibpath$finalize_shlibpath"; then - compile_command="$shlibpath_var=\"$compile_shlibpath$finalize_shlibpath\$$shlibpath_var\" $compile_command" - fi - if test -n "$finalize_shlibpath"; then - finalize_command="$shlibpath_var=\"$finalize_shlibpath\$$shlibpath_var\" $finalize_command" - fi - - compile_var= - finalize_var= - if test -n "$runpath_var"; then - if test -n "$perm_rpath"; then - # We should set the runpath_var. - rpath= - for dir in $perm_rpath; do - rpath="$rpath$dir:" - done - compile_var="$runpath_var=\"$rpath\$$runpath_var\" " - fi - if test -n "$finalize_perm_rpath"; then - # We should set the runpath_var. - rpath= - for dir in $finalize_perm_rpath; do - rpath="$rpath$dir:" - done - finalize_var="$runpath_var=\"$rpath\$$runpath_var\" " - fi - fi - - if test "$no_install" = yes; then - # We don't need to create a wrapper script. - link_command="$compile_var$compile_command$compile_rpath" - # Replace the output file specification. - link_command=`$ECHO "$link_command" | $SED 's%@OUTPUT@%'"$output"'%g'` - # Delete the old output file. - $opt_dry_run || $RM $output - # Link the executable and exit - func_show_eval "$link_command" 'exit $?' - exit $EXIT_SUCCESS - fi - - if test "$hardcode_action" = relink; then - # Fast installation is not supported - link_command="$compile_var$compile_command$compile_rpath" - relink_command="$finalize_var$finalize_command$finalize_rpath" - - func_warning "this platform does not like uninstalled shared libraries" - func_warning "\`$output' will be relinked during installation" - else - if test "$fast_install" != no; then - link_command="$finalize_var$compile_command$finalize_rpath" - if test "$fast_install" = yes; then - relink_command=`$ECHO "$compile_var$compile_command$compile_rpath" | $SED 's%@OUTPUT@%\$progdir/\$file%g'` - else - # fast_install is set to needless - relink_command= - fi - else - link_command="$compile_var$compile_command$compile_rpath" - relink_command="$finalize_var$finalize_command$finalize_rpath" - fi - fi - - # Replace the output file specification. - link_command=`$ECHO "$link_command" | $SED 's%@OUTPUT@%'"$output_objdir/$outputname"'%g'` - - # Delete the old output files. - $opt_dry_run || $RM $output $output_objdir/$outputname $output_objdir/lt-$outputname - - func_show_eval "$link_command" 'exit $?' - - # Now create the wrapper script. - func_verbose "creating $output" - - # Quote the relink command for shipping. - if test -n "$relink_command"; then - # Preserve any variables that may affect compiler behavior - for var in $variables_saved_for_relink; do - if eval test -z \"\${$var+set}\"; then - relink_command="{ test -z \"\${$var+set}\" || $lt_unset $var || { $var=; export $var; }; }; $relink_command" - elif eval var_value=\$$var; test -z "$var_value"; then - relink_command="$var=; export $var; $relink_command" - else - func_quote_for_eval "$var_value" - relink_command="$var=$func_quote_for_eval_result; export $var; $relink_command" - fi - done - relink_command="(cd `pwd`; $relink_command)" - relink_command=`$ECHO "$relink_command" | $SED "$sed_quote_subst"` - fi - - # Only actually do things if not in dry run mode. - $opt_dry_run || { - # win32 will think the script is a binary if it has - # a .exe suffix, so we strip it off here. - case $output in - *.exe) func_stripname '' '.exe' "$output" - output=$func_stripname_result ;; - esac - # test for cygwin because mv fails w/o .exe extensions - case $host in - *cygwin*) - exeext=.exe - func_stripname '' '.exe' "$outputname" - outputname=$func_stripname_result ;; - *) exeext= ;; - esac - case $host in - *cygwin* | *mingw* ) - func_dirname_and_basename "$output" "" "." - output_name=$func_basename_result - output_path=$func_dirname_result - cwrappersource="$output_path/$objdir/lt-$output_name.c" - cwrapper="$output_path/$output_name.exe" - $RM $cwrappersource $cwrapper - trap "$RM $cwrappersource $cwrapper; 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You can get - \`Flex' from any GNU archive site." - rm -f lex.yy.c - if test $# -ne 1; then - eval LASTARG="\${$#}" - case $LASTARG in - *.l) - SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'` - if test -f "$SRCFILE"; then - cp "$SRCFILE" lex.yy.c - fi - ;; - esac - fi - if test ! -f lex.yy.c; then - echo 'main() { return 0; }' >lex.yy.c - fi - ;; - - help2man*) - echo 1>&2 "\ -WARNING: \`$1' is $msg. You should only need it if - you modified a dependency of a manual page. You may need the - \`Help2man' package in order for those modifications to take - effect. You can get \`Help2man' from any GNU archive site." - - file=`echo "$*" | sed -n "$sed_output"` - test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"` - if test -f "$file"; then - touch $file - else - test -z "$file" || exec >$file - echo ".ab help2man is required to generate this page" - exit $? - fi - ;; - - makeinfo*) - echo 1>&2 "\ -WARNING: \`$1' is $msg. You should only need it if - you modified a \`.texi' or \`.texinfo' file, or any other file - indirectly affecting the aspect of the manual. The spurious - call might also be the consequence of using a buggy \`make' (AIX, - DU, IRIX). You might want to install the \`Texinfo' package or - the \`GNU make' package. Grab either from any GNU archive site." - # The file to touch is that specified with -o ... - file=`echo "$*" | sed -n "$sed_output"` - test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"` - if test -z "$file"; then - # ... or it is the one specified with @setfilename ... - infile=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'` - file=`sed -n ' - /^@setfilename/{ - s/.* \([^ ]*\) *$/\1/ - p - q - }' $infile` - # ... or it is derived from the source name (dir/f.texi becomes f.info) - test -z "$file" && file=`echo "$infile" | sed 's,.*/,,;s,.[^.]*$,,'`.info - fi - # If the file does not exist, the user really needs makeinfo; - # let's fail without touching anything. - test -f $file || exit 1 - touch $file - ;; - - tar*) - shift - - # We have already tried tar in the generic part. - # Look for gnutar/gtar before invocation to avoid ugly error - # messages. - if (gnutar --version > /dev/null 2>&1); then - gnutar "$@" && exit 0 - fi - if (gtar --version > /dev/null 2>&1); then - gtar "$@" && exit 0 - fi - firstarg="$1" - if shift; then - case $firstarg in - *o*) - firstarg=`echo "$firstarg" | sed s/o//` - tar "$firstarg" "$@" && exit 0 - ;; - esac - case $firstarg in - *h*) - firstarg=`echo "$firstarg" | sed s/h//` - tar "$firstarg" "$@" && exit 0 - ;; - esac - fi - - echo 1>&2 "\ -WARNING: I can't seem to be able to run \`tar' with the given arguments. - You may want to install GNU tar or Free paxutils, or check the - command line arguments." - exit 1 - ;; - - *) - echo 1>&2 "\ -WARNING: \`$1' is needed, and is $msg. - You might have modified some files without having the - proper tools for further handling them. Check the \`README' file, - it often tells you about the needed prerequisites for installing - this package. You may also peek at any GNU archive site, in case - some other package would contain this missing \`$1' program." - exit 1 - ;; -esac - -exit 0 - -# Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) -# time-stamp-start: "scriptversion=" -# time-stamp-format: "%:y-%02m-%02d.%02H" -# time-stamp-time-zone: "UTC" -# time-stamp-end: "; # UTC" -# End: diff --git a/src/png/png.5 b/src/png/png.5 index 765759dc4f..5a190ab9f8 100644 --- a/src/png/png.5 +++ b/src/png/png.5 @@ -1,4 +1,4 @@ -.TH PNG 5 "September 23, 2010" +.TH PNG 5 "November 3, 2011" .SH NAME png \- Portable Network Graphics (PNG) format .SH DESCRIPTION diff --git a/src/png/png.c b/src/png/png.c index f2e5888fa0..7393dfa57f 100644 --- a/src/png/png.c +++ b/src/png/png.c @@ -1,8 +1,8 @@ /* png.c - location for general purpose libpng functions * - * Last changed in libpng 1.4.2 [May 6, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -11,17 +11,10 @@ * and license in png.h */ -#define PNG_NO_EXTERN -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" #include "pngpriv.h" /* Generate a compiler error if there is an old png.h in the search path. */ -typedef version_1_4_4 Your_png_h_is_not_version_1_4_4; - -/* Version information for C files. This had better match the version - * string defined in png.h. - */ +typedef png_libpng_version_1_5_6 Your_png_h_is_not_version_1_5_6; /* Tells libpng that we have already handled the first "num_bytes" bytes * of the PNG file signature. If the PNG data is embedded into another @@ -50,14 +43,16 @@ png_set_sig_bytes(png_structp png_ptr, int num_bytes) * can simply check the remaining bytes for extra assurance. Returns * an integer less than, equal to, or greater than zero if sig is found, * respectively, to be less than, to match, or be greater than the correct - * PNG signature (this is the same behaviour as strcmp, memcmp, etc). + * PNG signature (this is the same behavior as strcmp, memcmp, etc). */ int PNGAPI -png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check) +png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check) { png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; + if (num_to_check > 8) num_to_check = 8; + else if (num_to_check < 1) return (-1); @@ -73,9 +68,9 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check) #endif /* PNG_READ_SUPPORTED */ #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -/* Function to allocate memory for zlib and clear it to 0. */ -voidpf /* PRIVATE */ -png_zalloc(voidpf png_ptr, uInt items, uInt size) +/* Function to allocate memory for zlib */ +PNG_FUNCTION(voidpf /* PRIVATE */, +png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED) { png_voidp ptr; png_structp p=(png_structp)png_ptr; @@ -84,6 +79,7 @@ png_zalloc(voidpf png_ptr, uInt items, uInt size) if (png_ptr == NULL) return (NULL); + if (items > PNG_UINT_32_MAX/size) { png_warning (p, "Potential overflow in png_zalloc()"); @@ -111,7 +107,8 @@ png_zfree(voidpf png_ptr, voidpf ptr) void /* PRIVATE */ png_reset_crc(png_structp png_ptr) { - png_ptr->crc = crc32(0, Z_NULL, 0); + /* The cast is safe because the crc is a 32 bit value. */ + png_ptr->crc = (png_uint_32)crc32(0, Z_NULL, 0); } /* Calculate the CRC over a section of data. We can only pass as @@ -120,24 +117,107 @@ png_reset_crc(png_structp png_ptr) * trouble of calculating it. */ void /* PRIVATE */ -png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length) +png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length) { int need_crc = 1; - if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ + if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) { if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) need_crc = 0; } - else /* critical */ + + else /* critical */ { if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) need_crc = 0; } - if (need_crc) - png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length); + /* 'uLong' is defined as unsigned long, this means that on some systems it is + * a 64 bit value. crc32, however, returns 32 bits so the following cast is + * safe. 'uInt' may be no more than 16 bits, so it is necessary to perform a + * loop here. + */ + if (need_crc && length > 0) + { + uLong crc = png_ptr->crc; /* Should never issue a warning */ + + do + { + uInt safeLength = (uInt)length; + if (safeLength == 0) + safeLength = (uInt)-1; /* evil, but safe */ + + crc = crc32(crc, ptr, safeLength); + + /* The following should never issue compiler warnings, if they do the + * target system has characteristics that will probably violate other + * assumptions within the libpng code. + */ + ptr += safeLength; + length -= safeLength; + } + while (length > 0); + + /* And the following is always safe because the crc is only 32 bits. */ + png_ptr->crc = (png_uint_32)crc; + } +} + +/* Check a user supplied version number, called from both read and write + * functions that create a png_struct + */ +int +png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver) +{ + if (user_png_ver) + { + int i = 0; + + do + { + if (user_png_ver[i] != png_libpng_ver[i]) + png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; + } while (png_libpng_ver[i++]); + } + + else + png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; + + if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) + { + /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so + * we must recompile any applications that use any older library version. + * For versions after libpng 1.0, we will be compatible, so we need + * only check the first digit. + */ + if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || + (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) || + (user_png_ver[0] == '0' && user_png_ver[2] < '9')) + { +#ifdef PNG_WARNINGS_SUPPORTED + size_t pos = 0; + char m[128]; + + pos = png_safecat(m, sizeof m, pos, "Application built with libpng-"); + pos = png_safecat(m, sizeof m, pos, user_png_ver); + pos = png_safecat(m, sizeof m, pos, " but running with "); + pos = png_safecat(m, sizeof m, pos, png_libpng_ver); + + png_warning(png_ptr, m); +#endif + +#ifdef PNG_ERROR_NUMBERS_SUPPORTED + png_ptr->flags = 0; +#endif + + return 0; + } + } + + /* Success return. */ + return 1; } /* Allocate the memory for an info_struct for the application. We don't @@ -146,8 +226,8 @@ png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length) * and png_info_init() so that applications that want to use a shared * libpng don't have to be recompiled if png_info changes size. */ -png_infop PNGAPI -png_create_info_struct(png_structp png_ptr) +PNG_FUNCTION(png_infop,PNGAPI +png_create_info_struct,(png_structp png_ptr),PNG_ALLOCATED) { png_infop info_ptr; @@ -237,8 +317,10 @@ png_data_freer(png_structp png_ptr, png_infop info_ptr, if (freer == PNG_DESTROY_WILL_FREE_DATA) info_ptr->free_me |= mask; + else if (freer == PNG_USER_WILL_FREE_DATA) info_ptr->free_me &= ~mask; + else png_warning(png_ptr, "Unknown freer parameter in png_data_freer"); @@ -265,6 +347,7 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, info_ptr->text[num].key = NULL; } } + else { int i; @@ -291,12 +374,10 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, /* Free any sCAL entry */ if ((mask & PNG_FREE_SCAL) & info_ptr->free_me) { -#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) png_free(png_ptr, info_ptr->scal_s_width); png_free(png_ptr, info_ptr->scal_s_height); info_ptr->scal_s_width = NULL; info_ptr->scal_s_height = NULL; -#endif info_ptr->valid &= ~PNG_INFO_sCAL; } #endif @@ -350,6 +431,7 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, info_ptr->splt_palettes[num].entries = NULL; } } + else { if (info_ptr->splt_palettes_num) @@ -384,13 +466,14 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, info_ptr->unknown_chunks[num].data = NULL; } } + else { int i; if (info_ptr->unknown_chunks_num) { - for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++) + for (i = 0; i < info_ptr->unknown_chunks_num; i++) png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i); png_free(png_ptr, info_ptr->unknown_chunks); @@ -439,10 +522,10 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, } #endif - if (num == -1) - info_ptr->free_me &= ~mask; - else - info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL); + if (num != -1) + mask &= ~PNG_FREE_MUL; + + info_ptr->free_me &= ~mask; } /* This is an internal routine to free any memory that the info struct is @@ -478,16 +561,17 @@ png_get_io_ptr(png_structp png_ptr) { if (png_ptr == NULL) return (NULL); + return (png_ptr->io_ptr); } #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -#ifdef PNG_STDIO_SUPPORTED +# ifdef PNG_STDIO_SUPPORTED /* Initialize the default input/output functions for the PNG file. If you * use your own read or write routines, you can call either png_set_read_fn() * or png_set_write_fn() instead of png_init_io(). If you have defined - * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't - * necessarily available. + * PNG_NO_STDIO or otherwise disabled PNG_STDIO_SUPPORTED, you must use a + * function of your own because "FILE *" isn't necessarily available. */ void PNGAPI png_init_io(png_structp png_ptr, png_FILE_p fp) @@ -499,14 +583,14 @@ png_init_io(png_structp png_ptr, png_FILE_p fp) png_ptr->io_ptr = (png_voidp)fp; } -#endif +# endif -#ifdef PNG_TIME_RFC1123_SUPPORTED +# ifdef PNG_TIME_RFC1123_SUPPORTED /* Convert the supplied time into an RFC 1123 string suitable for use in * a "Creation Time" or other text-based time string. */ -png_charp PNGAPI -png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime) +png_const_charp PNGAPI +png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime) { static PNG_CONST char short_months[12][4] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", @@ -514,54 +598,64 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime) if (png_ptr == NULL) return (NULL); - if (png_ptr->time_buffer == NULL) - { - png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29* - png_sizeof(char))); - } -#ifdef USE_FAR_KEYWORD { - char near_time_buf[29]; - png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000", - ptime->day % 32, short_months[(ptime->month - 1) % 12], - ptime->year, ptime->hour % 24, ptime->minute % 60, - ptime->second % 61); - png_memcpy(png_ptr->time_buffer, near_time_buf, - 29*png_sizeof(char)); + size_t pos = 0; + char number_buf[5]; /* enough for a four digit year */ + +# define APPEND_STRING(string)\ + pos = png_safecat(png_ptr->time_buffer, sizeof png_ptr->time_buffer,\ + pos, (string)) +# define APPEND_NUMBER(format, value)\ + APPEND_STRING(PNG_FORMAT_NUMBER(number_buf, format, (value))) +# define APPEND(ch)\ + if (pos < (sizeof png_ptr->time_buffer)-1)\ + png_ptr->time_buffer[pos++] = (ch) + + APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day % 32); + APPEND(' '); + APPEND_STRING(short_months[(ptime->month - 1) % 12]); + APPEND(' '); + APPEND_NUMBER(PNG_NUMBER_FORMAT_u, ptime->year); + APPEND(' '); + APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->hour % 24); + APPEND(':'); + APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->minute % 60); + APPEND(':'); + APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->second % 61); + APPEND_STRING(" +0000"); /* This reliably terminates the buffer */ + +# undef APPEND +# undef APPEND_NUMBER +# undef APPEND_STRING } -#else - png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000", - ptime->day % 32, short_months[(ptime->month - 1) % 12], - ptime->year, ptime->hour % 24, ptime->minute % 60, - ptime->second % 61); -#endif - return ((png_charp)png_ptr->time_buffer); + + return png_ptr->time_buffer; } -#endif /* PNG_TIME_RFC1123_SUPPORTED */ +# endif /* PNG_TIME_RFC1123_SUPPORTED */ #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ -png_charp PNGAPI -png_get_copyright(png_structp png_ptr) +png_const_charp PNGAPI +png_get_copyright(png_const_structp png_ptr) { - png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ + PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ #ifdef PNG_STRING_COPYRIGHT - return PNG_STRING_COPYRIGHT + return PNG_STRING_COPYRIGHT #else -#ifdef __STDC__ - return ((png_charp) PNG_STRING_NEWLINE \ - "libpng version 1.4.4 - September 23, 2010" PNG_STRING_NEWLINE \ - "Copyright (c) 1998-2010 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ +# ifdef __STDC__ + return PNG_STRING_NEWLINE \ + "libpng version 1.5.6 - November 3, 2011" PNG_STRING_NEWLINE \ + "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ - PNG_STRING_NEWLINE); -#else - return ((png_charp) "libpng version 1.4.4 - September 23, 2010\ - Copyright (c) 1998-2010 Glenn Randers-Pehrson\ + PNG_STRING_NEWLINE; +# else + return "libpng version 1.5.6 - November 3, 2011\ + Copyright (c) 1998-2011 Glenn Randers-Pehrson\ Copyright (c) 1996-1997 Andreas Dilger\ - Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."); -#endif + Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; +# endif #endif } @@ -573,56 +667,74 @@ png_get_copyright(png_structp png_ptr) * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard, * it is guaranteed that png.c uses the correct version of png.h. */ -png_charp PNGAPI -png_get_libpng_ver(png_structp png_ptr) +png_const_charp PNGAPI +png_get_libpng_ver(png_const_structp png_ptr) { /* Version of *.c files used when building libpng */ - png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ - return ((png_charp) PNG_LIBPNG_VER_STRING); + return png_get_header_ver(png_ptr); } -png_charp PNGAPI -png_get_header_ver(png_structp png_ptr) +png_const_charp PNGAPI +png_get_header_ver(png_const_structp png_ptr) { /* Version of *.h files used when building libpng */ - png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ - return ((png_charp) PNG_LIBPNG_VER_STRING); + PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ + return PNG_LIBPNG_VER_STRING; } -png_charp PNGAPI -png_get_header_version(png_structp png_ptr) +png_const_charp PNGAPI +png_get_header_version(png_const_structp png_ptr) { /* Returns longer string containing both version and date */ - png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ + PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ #ifdef __STDC__ - return ((png_charp) PNG_HEADER_VERSION_STRING -#ifndef PNG_READ_SUPPORTED + return PNG_HEADER_VERSION_STRING +# ifndef PNG_READ_SUPPORTED " (NO READ SUPPORT)" -#endif - PNG_STRING_NEWLINE); +# endif + PNG_STRING_NEWLINE; #else - return ((png_charp) PNG_HEADER_VERSION_STRING); + return PNG_HEADER_VERSION_STRING; #endif } -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED int PNGAPI -png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name) +png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name) { /* Check chunk_name and return "keep" value if it's on the list, else 0 */ - int i; - png_bytep p; - if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0) - return 0; - p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5; - for (i = png_ptr->num_chunk_list; i; i--, p -= 5) + png_const_bytep p, p_end; + + if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list <= 0) + return PNG_HANDLE_CHUNK_AS_DEFAULT; + + p_end = png_ptr->chunk_list; + p = p_end + png_ptr->num_chunk_list*5; /* beyond end */ + + /* The code is the fifth byte after each four byte string. Historically this + * code was always searched from the end of the list, so it should continue + * to do so in case there are duplicated entries. + */ + do /* num_chunk_list > 0, so at least one */ + { + p -= 5; if (!png_memcmp(chunk_name, p, 4)) - return ((int)*(p + 4)); - return 0; + return p[4]; + } + while (p > p_end); + + return PNG_HANDLE_CHUNK_AS_DEFAULT; +} + +int /* PRIVATE */ +png_chunk_unknown_handling(png_structp png_ptr, png_uint_32 chunk_name) +{ + png_byte chunk_string[5]; + + PNG_CSTRING_FROM_CHUNK(chunk_string, chunk_name); + return png_handle_as_unknown(png_ptr, chunk_string); } #endif -#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ #ifdef PNG_READ_SUPPORTED /* This function, added to libpng-1.0.6g, is untested. */ @@ -631,6 +743,7 @@ png_reset_zstream(png_structp png_ptr) { if (png_ptr == NULL) return Z_STREAM_ERROR; + return (inflateReset(&png_ptr->zstream)); } #endif /* PNG_READ_SUPPORTED */ @@ -640,67 +753,18 @@ png_uint_32 PNGAPI png_access_version_number(void) { /* Version of *.c files used when building libpng */ - return((png_uint_32) PNG_LIBPNG_VER); + return((png_uint_32)PNG_LIBPNG_VER); } #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -#ifdef PNG_SIZE_T -/* Added at libpng version 1.2.6 */ - PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size)); -png_size_t PNGAPI -png_convert_size(size_t size) -{ - if (size > (png_size_t)-1) - PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */ - return ((png_size_t)size); -} -#endif /* PNG_SIZE_T */ +/* png_convert_size: a PNGAPI but no longer in png.h, so deleted + * at libpng 1.5.5! + */ /* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */ -#ifdef PNG_cHRM_SUPPORTED -#ifdef PNG_CHECK_cHRM_SUPPORTED - -/* - * Multiply two 32-bit numbers, V1 and V2, using 32-bit - * arithmetic, to produce a 64 bit result in the HI/LO words. - * - * A B - * x C D - * ------ - * AD || BD - * AC || CB || 0 - * - * where A and B are the high and low 16-bit words of V1, - * C and D are the 16-bit words of V2, AD is the product of - * A and D, and X || Y is (X << 16) + Y. -*/ - -void /* PRIVATE */ -png_64bit_product (long v1, long v2, unsigned long *hi_product, - unsigned long *lo_product) -{ - int a, b, c, d; - long lo, hi, x, y; - - a = (v1 >> 16) & 0xffff; - b = v1 & 0xffff; - c = (v2 >> 16) & 0xffff; - d = v2 & 0xffff; - - lo = b * d; /* BD */ - x = a * d + c * b; /* AD + CB */ - y = ((lo >> 16) & 0xffff) + x; - - lo = (lo & 0xffff) | ((y & 0xffff) << 16); - hi = (y >> 16) & 0xffff; - - hi += a * c; /* AC */ - - *hi_product = (unsigned long)hi; - *lo_product = (unsigned long)lo; -} +# ifdef PNG_CHECK_cHRM_SUPPORTED int /* PRIVATE */ png_check_cHRM_fixed(png_structp png_ptr, @@ -716,6 +780,13 @@ png_check_cHRM_fixed(png_structp png_ptr, if (png_ptr == NULL) return 0; + /* (x,y,z) values are first limited to 0..100000 (PNG_FP_1), the white + * y must also be greater than 0. To test for the upper limit calculate + * (PNG_FP_1-y) - x must be <= to this for z to be >= 0 (and the expression + * cannot overflow.) At this point we know x and y are >= 0 and (x+y) is + * <= PNG_FP_1. The previous test on PNG_MAX_UINT_31 is removed because it + * pointless (and it produces compiler warnings!) + */ if (white_x < 0 || white_y <= 0 || red_x < 0 || red_y < 0 || green_x < 0 || green_y < 0 || @@ -725,35 +796,26 @@ png_check_cHRM_fixed(png_structp png_ptr, "Ignoring attempt to set negative chromaticity value"); ret = 0; } - if (white_x > (png_fixed_point) PNG_UINT_31_MAX || - white_y > (png_fixed_point) PNG_UINT_31_MAX || - red_x > (png_fixed_point) PNG_UINT_31_MAX || - red_y > (png_fixed_point) PNG_UINT_31_MAX || - green_x > (png_fixed_point) PNG_UINT_31_MAX || - green_y > (png_fixed_point) PNG_UINT_31_MAX || - blue_x > (png_fixed_point) PNG_UINT_31_MAX || - blue_y > (png_fixed_point) PNG_UINT_31_MAX ) - { - png_warning(png_ptr, - "Ignoring attempt to set chromaticity value exceeding 21474.83"); - ret = 0; - } - if (white_x > 100000L - white_y) + /* And (x+y) must be <= PNG_FP_1 (so z is >= 0) */ + if (white_x > PNG_FP_1 - white_y) { png_warning(png_ptr, "Invalid cHRM white point"); ret = 0; } - if (red_x > 100000L - red_y) + + if (red_x > PNG_FP_1 - red_y) { png_warning(png_ptr, "Invalid cHRM red point"); ret = 0; } - if (green_x > 100000L - green_y) + + if (green_x > PNG_FP_1 - green_y) { png_warning(png_ptr, "Invalid cHRM green point"); ret = 0; } - if (blue_x > 100000L - blue_y) + + if (blue_x > PNG_FP_1 - blue_y) { png_warning(png_ptr, "Invalid cHRM blue point"); ret = 0; @@ -771,8 +833,327 @@ png_check_cHRM_fixed(png_structp png_ptr, return ret; } -#endif /* PNG_CHECK_cHRM_SUPPORTED */ -#endif /* PNG_cHRM_SUPPORTED */ +# endif /* PNG_CHECK_cHRM_SUPPORTED */ + +#ifdef PNG_cHRM_SUPPORTED +/* Added at libpng-1.5.5 to support read and write of true CIEXYZ values for + * cHRM, as opposed to using chromaticities. These internal APIs return + * non-zero on a parameter error. The X, Y and Z values are required to be + * positive and less than 1.0. + */ +int png_xy_from_XYZ(png_xy *xy, png_XYZ XYZ) +{ + png_int_32 d, dwhite, whiteX, whiteY; + + d = XYZ.redX + XYZ.redY + XYZ.redZ; + if (!png_muldiv(&xy->redx, XYZ.redX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->redy, XYZ.redY, PNG_FP_1, d)) return 1; + dwhite = d; + whiteX = XYZ.redX; + whiteY = XYZ.redY; + + d = XYZ.greenX + XYZ.greenY + XYZ.greenZ; + if (!png_muldiv(&xy->greenx, XYZ.greenX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->greeny, XYZ.greenY, PNG_FP_1, d)) return 1; + dwhite += d; + whiteX += XYZ.greenX; + whiteY += XYZ.greenY; + + d = XYZ.blueX + XYZ.blueY + XYZ.blueZ; + if (!png_muldiv(&xy->bluex, XYZ.blueX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->bluey, XYZ.blueY, PNG_FP_1, d)) return 1; + dwhite += d; + whiteX += XYZ.blueX; + whiteY += XYZ.blueY; + + /* The reference white is simply the same of the end-point (X,Y,Z) vectors, + * thus: + */ + if (!png_muldiv(&xy->whitex, whiteX, PNG_FP_1, dwhite)) return 1; + if (!png_muldiv(&xy->whitey, whiteY, PNG_FP_1, dwhite)) return 1; + + return 0; +} + +int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy) +{ + png_fixed_point red_inverse, green_inverse, blue_scale; + png_fixed_point left, right, denominator; + + /* Check xy and, implicitly, z. Note that wide gamut color spaces typically + * have end points with 0 tristimulus values (these are impossible end + * points, but they are used to cover the possible colors.) + */ + if (xy.redx < 0 || xy.redx > PNG_FP_1) return 1; + if (xy.redy < 0 || xy.redy > PNG_FP_1-xy.redx) return 1; + if (xy.greenx < 0 || xy.greenx > PNG_FP_1) return 1; + if (xy.greeny < 0 || xy.greeny > PNG_FP_1-xy.greenx) return 1; + if (xy.bluex < 0 || xy.bluex > PNG_FP_1) return 1; + if (xy.bluey < 0 || xy.bluey > PNG_FP_1-xy.bluex) return 1; + if (xy.whitex < 0 || xy.whitex > PNG_FP_1) return 1; + if (xy.whitey < 0 || xy.whitey > PNG_FP_1-xy.whitex) return 1; + + /* The reverse calculation is more difficult because the original tristimulus + * value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8 + * derived values were recorded in the cHRM chunk; + * (red,green,blue,white)x(x,y). This loses one degree of freedom and + * therefore an arbitrary ninth value has to be introduced to undo the + * original transformations. + * + * Think of the original end-points as points in (X,Y,Z) space. The + * chromaticity values (c) have the property: + * + * C + * c = --------- + * X + Y + Z + * + * For each c (x,y,z) from the corresponding original C (X,Y,Z). Thus the + * three chromaticity values (x,y,z) for each end-point obey the + * relationship: + * + * x + y + z = 1 + * + * This describes the plane in (X,Y,Z) space that intersects each axis at the + * value 1.0; call this the chromaticity plane. Thus the chromaticity + * calculation has scaled each end-point so that it is on the x+y+z=1 plane + * and chromaticity is the intersection of the vector from the origin to the + * (X,Y,Z) value with the chromaticity plane. + * + * To fully invert the chromaticity calculation we would need the three + * end-point scale factors, (red-scale, green-scale, blue-scale), but these + * were not recorded. Instead we calculated the reference white (X,Y,Z) and + * recorded the chromaticity of this. The reference white (X,Y,Z) would have + * given all three of the scale factors since: + * + * color-C = color-c * color-scale + * white-C = red-C + green-C + blue-C + * = red-c*red-scale + green-c*green-scale + blue-c*blue-scale + * + * But cHRM records only white-x and white-y, so we have lost the white scale + * factor: + * + * white-C = white-c*white-scale + * + * To handle this the inverse transformation makes an arbitrary assumption + * about white-scale: + * + * Assume: white-Y = 1.0 + * Hence: white-scale = 1/white-y + * Or: red-Y + green-Y + blue-Y = 1.0 + * + * Notice the last statement of the assumption gives an equation in three of + * the nine values we want to calculate. 8 more equations come from the + * above routine as summarised at the top above (the chromaticity + * calculation): + * + * Given: color-x = color-X / (color-X + color-Y + color-Z) + * Hence: (color-x - 1)*color-X + color.x*color-Y + color.x*color-Z = 0 + * + * This is 9 simultaneous equations in the 9 variables "color-C" and can be + * solved by Cramer's rule. Cramer's rule requires calculating 10 9x9 matrix + * determinants, however this is not as bad as it seems because only 28 of + * the total of 90 terms in the various matrices are non-zero. Nevertheless + * Cramer's rule is notoriously numerically unstable because the determinant + * calculation involves the difference of large, but similar, numbers. It is + * difficult to be sure that the calculation is stable for real world values + * and it is certain that it becomes unstable where the end points are close + * together. + * + * So this code uses the perhaps slighly less optimal but more understandable + * and totally obvious approach of calculating color-scale. + * + * This algorithm depends on the precision in white-scale and that is + * (1/white-y), so we can immediately see that as white-y approaches 0 the + * accuracy inherent in the cHRM chunk drops off substantially. + * + * libpng arithmetic: a simple invertion of the above equations + * ------------------------------------------------------------ + * + * white_scale = 1/white-y + * white-X = white-x * white-scale + * white-Y = 1.0 + * white-Z = (1 - white-x - white-y) * white_scale + * + * white-C = red-C + green-C + blue-C + * = red-c*red-scale + green-c*green-scale + blue-c*blue-scale + * + * This gives us three equations in (red-scale,green-scale,blue-scale) where + * all the coefficients are now known: + * + * red-x*red-scale + green-x*green-scale + blue-x*blue-scale + * = white-x/white-y + * red-y*red-scale + green-y*green-scale + blue-y*blue-scale = 1 + * red-z*red-scale + green-z*green-scale + blue-z*blue-scale + * = (1 - white-x - white-y)/white-y + * + * In the last equation color-z is (1 - color-x - color-y) so we can add all + * three equations together to get an alternative third: + * + * red-scale + green-scale + blue-scale = 1/white-y = white-scale + * + * So now we have a Cramer's rule solution where the determinants are just + * 3x3 - far more tractible. Unfortunately 3x3 determinants still involve + * multiplication of three coefficients so we can't guarantee to avoid + * overflow in the libpng fixed point representation. Using Cramer's rule in + * floating point is probably a good choice here, but it's not an option for + * fixed point. Instead proceed to simplify the first two equations by + * eliminating what is likely to be the largest value, blue-scale: + * + * blue-scale = white-scale - red-scale - green-scale + * + * Hence: + * + * (red-x - blue-x)*red-scale + (green-x - blue-x)*green-scale = + * (white-x - blue-x)*white-scale + * + * (red-y - blue-y)*red-scale + (green-y - blue-y)*green-scale = + * 1 - blue-y*white-scale + * + * And now we can trivially solve for (red-scale,green-scale): + * + * green-scale = + * (white-x - blue-x)*white-scale - (red-x - blue-x)*red-scale + * ----------------------------------------------------------- + * green-x - blue-x + * + * red-scale = + * 1 - blue-y*white-scale - (green-y - blue-y) * green-scale + * --------------------------------------------------------- + * red-y - blue-y + * + * Hence: + * + * red-scale = + * ( (green-x - blue-x) * (white-y - blue-y) - + * (green-y - blue-y) * (white-x - blue-x) ) / white-y + * ------------------------------------------------------------------------- + * (green-x - blue-x)*(red-y - blue-y)-(green-y - blue-y)*(red-x - blue-x) + * + * green-scale = + * ( (red-y - blue-y) * (white-x - blue-x) - + * (red-x - blue-x) * (white-y - blue-y) ) / white-y + * ------------------------------------------------------------------------- + * (green-x - blue-x)*(red-y - blue-y)-(green-y - blue-y)*(red-x - blue-x) + * + * Accuracy: + * The input values have 5 decimal digits of accuracy. The values are all in + * the range 0 < value < 1, so simple products are in the same range but may + * need up to 10 decimal digits to preserve the original precision and avoid + * underflow. Because we are using a 32-bit signed representation we cannot + * match this; the best is a little over 9 decimal digits, less than 10. + * + * The approach used here is to preserve the maximum precision within the + * signed representation. Because the red-scale calculation above uses the + * difference between two products of values that must be in the range -1..+1 + * it is sufficient to divide the product by 7; ceil(100,000/32767*2). The + * factor is irrelevant in the calculation because it is applied to both + * numerator and denominator. + * + * Note that the values of the differences of the products of the + * chromaticities in the above equations tend to be small, for example for + * the sRGB chromaticities they are: + * + * red numerator: -0.04751 + * green numerator: -0.08788 + * denominator: -0.2241 (without white-y multiplication) + * + * The resultant Y coefficients from the chromaticities of some widely used + * color space definitions are (to 15 decimal places): + * + * sRGB + * 0.212639005871510 0.715168678767756 0.072192315360734 + * Kodak ProPhoto + * 0.288071128229293 0.711843217810102 0.000085653960605 + * Adobe RGB + * 0.297344975250536 0.627363566255466 0.075291458493998 + * Adobe Wide Gamut RGB + * 0.258728243040113 0.724682314948566 0.016589442011321 + */ + /* By the argument, above overflow should be impossible here. The return + * value of 2 indicates an internal error to the caller. + */ + if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.redy - xy.bluey, 7)) return 2; + if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.redx - xy.bluex, 7)) return 2; + denominator = left - right; + + /* Now find the red numerator. */ + if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; + if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; + + /* Overflow is possible here and it indicates an extreme set of PNG cHRM + * chunk values. This calculation actually returns the reciprocal of the + * scale value because this allows us to delay the multiplication of white-y + * into the denominator, which tends to produce a small number. + */ + if (!png_muldiv(&red_inverse, xy.whitey, denominator, left-right) || + red_inverse <= xy.whitey /* r+g+b scales = white scale */) + return 1; + + /* Similarly for green_inverse: */ + if (!png_muldiv(&left, xy.redy-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; + if (!png_muldiv(&right, xy.redx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; + if (!png_muldiv(&green_inverse, xy.whitey, denominator, left-right) || + green_inverse <= xy.whitey) + return 1; + + /* And the blue scale, the checks above guarantee this can't overflow but it + * can still produce 0 for extreme cHRM values. + */ + blue_scale = png_reciprocal(xy.whitey) - png_reciprocal(red_inverse) - + png_reciprocal(green_inverse); + if (blue_scale <= 0) return 1; + + + /* And fill in the png_XYZ: */ + if (!png_muldiv(&XYZ->redX, xy.redx, PNG_FP_1, red_inverse)) return 1; + if (!png_muldiv(&XYZ->redY, xy.redy, PNG_FP_1, red_inverse)) return 1; + if (!png_muldiv(&XYZ->redZ, PNG_FP_1 - xy.redx - xy.redy, PNG_FP_1, + red_inverse)) + return 1; + + if (!png_muldiv(&XYZ->greenX, xy.greenx, PNG_FP_1, green_inverse)) return 1; + if (!png_muldiv(&XYZ->greenY, xy.greeny, PNG_FP_1, green_inverse)) return 1; + if (!png_muldiv(&XYZ->greenZ, PNG_FP_1 - xy.greenx - xy.greeny, PNG_FP_1, + green_inverse)) + return 1; + + if (!png_muldiv(&XYZ->blueX, xy.bluex, blue_scale, PNG_FP_1)) return 1; + if (!png_muldiv(&XYZ->blueY, xy.bluey, blue_scale, PNG_FP_1)) return 1; + if (!png_muldiv(&XYZ->blueZ, PNG_FP_1 - xy.bluex - xy.bluey, blue_scale, + PNG_FP_1)) + return 1; + + return 0; /*success*/ +} + +int png_XYZ_from_xy_checked(png_structp png_ptr, png_XYZ *XYZ, png_xy xy) +{ + switch (png_XYZ_from_xy(XYZ, xy)) + { + case 0: /* success */ + return 1; + + case 1: + /* The chunk may be technically valid, but we got png_fixed_point + * overflow while trying to get XYZ values out of it. This is + * entirely benign - the cHRM chunk is pretty extreme. + */ + png_warning(png_ptr, + "extreme cHRM chunk cannot be converted to tristimulus values"); + break; + + default: + /* libpng is broken; this should be a warning but if it happens we + * want error reports so for the moment it is an error. + */ + png_error(png_ptr, "internal error in png_XYZ_from_xy"); + break; + } + + /* ERROR RETURN */ + return 0; +} +#endif void /* PRIVATE */ png_check_IHDR(png_structp png_ptr, @@ -795,21 +1176,22 @@ png_check_IHDR(png_structp png_ptr, error = 1; } -#ifdef PNG_SET_USER_LIMITS_SUPPORTED - if (width > png_ptr->user_width_max || width > PNG_USER_WIDTH_MAX) -#else +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + if (width > png_ptr->user_width_max) + +# else if (width > PNG_USER_WIDTH_MAX) -#endif +# endif { png_warning(png_ptr, "Image width exceeds user limit in IHDR"); error = 1; } -#ifdef PNG_SET_USER_LIMITS_SUPPORTED - if (height > png_ptr->user_height_max || height > PNG_USER_HEIGHT_MAX) -#else +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + if (height > png_ptr->user_height_max) +# else if (height > PNG_USER_HEIGHT_MAX) -#endif +# endif { png_warning(png_ptr, "Image height exceeds user limit in IHDR"); error = 1; @@ -821,15 +1203,15 @@ png_check_IHDR(png_structp png_ptr, error = 1; } - if ( height > PNG_UINT_31_MAX) + if (height > PNG_UINT_31_MAX) { png_warning(png_ptr, "Invalid image height in IHDR"); error = 1; } - if ( width > (PNG_UINT_32_MAX + if (width > (PNG_UINT_32_MAX >> 3) /* 8-byte RGBA pixels */ - - 64 /* bigrowbuf hack */ + - 48 /* bigrowbuf hack */ - 1 /* filter byte */ - 7*8 /* rounding of width to multiple of 8 pixels */ - 8) /* extra max_pixel_depth pad */ @@ -871,7 +1253,7 @@ png_check_IHDR(png_structp png_ptr, error = 1; } -#ifdef PNG_MNG_FEATURES_SUPPORTED +# ifdef PNG_MNG_FEATURES_SUPPORTED /* Accept filter_method 64 (intrapixel differencing) only if * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and * 2. Libpng did not read a PNG signature (this filter_method is only @@ -888,10 +1270,10 @@ png_check_IHDR(png_structp png_ptr, if (filter_type != PNG_FILTER_TYPE_BASE) { if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && - ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) && - (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA))) + (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && + ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) && + (color_type == PNG_COLOR_TYPE_RGB || + color_type == PNG_COLOR_TYPE_RGB_ALPHA))) { png_warning(png_ptr, "Unknown filter method in IHDR"); error = 1; @@ -904,15 +1286,1572 @@ png_check_IHDR(png_structp png_ptr, } } -#else +# else if (filter_type != PNG_FILTER_TYPE_BASE) { png_warning(png_ptr, "Unknown filter method in IHDR"); error = 1; } -#endif +# endif if (error == 1) png_error(png_ptr, "Invalid IHDR data"); } + +#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) +/* ASCII to fp functions */ +/* Check an ASCII formated floating point value, see the more detailed + * comments in pngpriv.h + */ +/* The following is used internally to preserve the sticky flags */ +#define png_fp_add(state, flags) ((state) |= (flags)) +#define png_fp_set(state, value) ((state) = (value) | ((state) & PNG_FP_STICKY)) + +int /* PRIVATE */ +png_check_fp_number(png_const_charp string, png_size_t size, int *statep, + png_size_tp whereami) +{ + int state = *statep; + png_size_t i = *whereami; + + while (i < size) + { + int type; + /* First find the type of the next character */ + switch (string[i]) + { + case 43: type = PNG_FP_SAW_SIGN; break; + case 45: type = PNG_FP_SAW_SIGN + PNG_FP_NEGATIVE; break; + case 46: type = PNG_FP_SAW_DOT; break; + case 48: type = PNG_FP_SAW_DIGIT; break; + case 49: case 50: case 51: case 52: + case 53: case 54: case 55: case 56: + case 57: type = PNG_FP_SAW_DIGIT + PNG_FP_NONZERO; break; + case 69: + case 101: type = PNG_FP_SAW_E; break; + default: goto PNG_FP_End; + } + + /* Now deal with this type according to the current + * state, the type is arranged to not overlap the + * bits of the PNG_FP_STATE. + */ + switch ((state & PNG_FP_STATE) + (type & PNG_FP_SAW_ANY)) + { + case PNG_FP_INTEGER + PNG_FP_SAW_SIGN: + if (state & PNG_FP_SAW_ANY) + goto PNG_FP_End; /* not a part of the number */ + + png_fp_add(state, type); + break; + + case PNG_FP_INTEGER + PNG_FP_SAW_DOT: + /* Ok as trailer, ok as lead of fraction. */ + if (state & PNG_FP_SAW_DOT) /* two dots */ + goto PNG_FP_End; + + else if (state & PNG_FP_SAW_DIGIT) /* trailing dot? */ + png_fp_add(state, type); + + else + png_fp_set(state, PNG_FP_FRACTION | type); + + break; + + case PNG_FP_INTEGER + PNG_FP_SAW_DIGIT: + if (state & PNG_FP_SAW_DOT) /* delayed fraction */ + png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT); + + png_fp_add(state, type | PNG_FP_WAS_VALID); + + break; + + case PNG_FP_INTEGER + PNG_FP_SAW_E: + if ((state & PNG_FP_SAW_DIGIT) == 0) + goto PNG_FP_End; + + png_fp_set(state, PNG_FP_EXPONENT); + + break; + + /* case PNG_FP_FRACTION + PNG_FP_SAW_SIGN: + goto PNG_FP_End; ** no sign in fraction */ + + /* case PNG_FP_FRACTION + PNG_FP_SAW_DOT: + goto PNG_FP_End; ** Because SAW_DOT is always set */ + + case PNG_FP_FRACTION + PNG_FP_SAW_DIGIT: + png_fp_add(state, type | PNG_FP_WAS_VALID); + break; + + case PNG_FP_FRACTION + PNG_FP_SAW_E: + /* This is correct because the trailing '.' on an + * integer is handled above - so we can only get here + * with the sequence ".E" (with no preceding digits). + */ + if ((state & PNG_FP_SAW_DIGIT) == 0) + goto PNG_FP_End; + + png_fp_set(state, PNG_FP_EXPONENT); + + break; + + case PNG_FP_EXPONENT + PNG_FP_SAW_SIGN: + if (state & PNG_FP_SAW_ANY) + goto PNG_FP_End; /* not a part of the number */ + + png_fp_add(state, PNG_FP_SAW_SIGN); + + break; + + /* case PNG_FP_EXPONENT + PNG_FP_SAW_DOT: + goto PNG_FP_End; */ + + case PNG_FP_EXPONENT + PNG_FP_SAW_DIGIT: + png_fp_add(state, PNG_FP_SAW_DIGIT | PNG_FP_WAS_VALID); + + break; + + /* case PNG_FP_EXPONEXT + PNG_FP_SAW_E: + goto PNG_FP_End; */ + + default: goto PNG_FP_End; /* I.e. break 2 */ + } + + /* The character seems ok, continue. */ + ++i; + } + +PNG_FP_End: + /* Here at the end, update the state and return the correct + * return code. + */ + *statep = state; + *whereami = i; + + return (state & PNG_FP_SAW_DIGIT) != 0; +} + + +/* The same but for a complete string. */ +int +png_check_fp_string(png_const_charp string, png_size_t size) +{ + int state=0; + png_size_t char_index=0; + + if (png_check_fp_number(string, size, &state, &char_index) && + (char_index == size || string[char_index] == 0)) + return state /* must be non-zero - see above */; + + return 0; /* i.e. fail */ +} +#endif /* pCAL or sCAL */ + +#ifdef PNG_READ_sCAL_SUPPORTED +# ifdef PNG_FLOATING_POINT_SUPPORTED +/* Utility used below - a simple accurate power of ten from an integral + * exponent. + */ +static double +png_pow10(int power) +{ + int recip = 0; + double d = 1; + + /* Handle negative exponent with a reciprocal at the end because + * 10 is exact whereas .1 is inexact in base 2 + */ + if (power < 0) + { + if (power < DBL_MIN_10_EXP) return 0; + recip = 1, power = -power; + } + + if (power > 0) + { + /* Decompose power bitwise. */ + double mult = 10; + do + { + if (power & 1) d *= mult; + mult *= mult; + power >>= 1; + } + while (power > 0); + + if (recip) d = 1/d; + } + /* else power is 0 and d is 1 */ + + return d; +} + +/* Function to format a floating point value in ASCII with a given + * precision. + */ +void /* PRIVATE */ +png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, + double fp, unsigned int precision) +{ + /* We use standard functions from math.h, but not printf because + * that would require stdio. The caller must supply a buffer of + * sufficient size or we will png_error. The tests on size and + * the space in ascii[] consumed are indicated below. + */ + if (precision < 1) + precision = DBL_DIG; + + /* Enforce the limit of the implementation precision too. */ + if (precision > DBL_DIG+1) + precision = DBL_DIG+1; + + /* Basic sanity checks */ + if (size >= precision+5) /* See the requirements below. */ + { + if (fp < 0) + { + fp = -fp; + *ascii++ = 45; /* '-' PLUS 1 TOTAL 1 */ + --size; + } + + if (fp >= DBL_MIN && fp <= DBL_MAX) + { + int exp_b10; /* A base 10 exponent */ + double base; /* 10^exp_b10 */ + + /* First extract a base 10 exponent of the number, + * the calculation below rounds down when converting + * from base 2 to base 10 (multiply by log10(2) - + * 0.3010, but 77/256 is 0.3008, so exp_b10 needs to + * be increased. Note that the arithmetic shift + * performs a floor() unlike C arithmetic - using a + * C multiply would break the following for negative + * exponents. + */ + (void)frexp(fp, &exp_b10); /* exponent to base 2 */ + + exp_b10 = (exp_b10 * 77) >> 8; /* <= exponent to base 10 */ + + /* Avoid underflow here. */ + base = png_pow10(exp_b10); /* May underflow */ + + while (base < DBL_MIN || base < fp) + { + /* And this may overflow. */ + double test = png_pow10(exp_b10+1); + + if (test <= DBL_MAX) + ++exp_b10, base = test; + + else + break; + } + + /* Normalize fp and correct exp_b10, after this fp is in the + * range [.1,1) and exp_b10 is both the exponent and the digit + * *before* which the decimal point should be inserted + * (starting with 0 for the first digit). Note that this + * works even if 10^exp_b10 is out of range because of the + * test on DBL_MAX above. + */ + fp /= base; + while (fp >= 1) fp /= 10, ++exp_b10; + + /* Because of the code above fp may, at this point, be + * less than .1, this is ok because the code below can + * handle the leading zeros this generates, so no attempt + * is made to correct that here. + */ + + { + int czero, clead, cdigits; + char exponent[10]; + + /* Allow up to two leading zeros - this will not lengthen + * the number compared to using E-n. + */ + if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */ + { + czero = -exp_b10; /* PLUS 2 digits: TOTAL 3 */ + exp_b10 = 0; /* Dot added below before first output. */ + } + else + czero = 0; /* No zeros to add */ + + /* Generate the digit list, stripping trailing zeros and + * inserting a '.' before a digit if the exponent is 0. + */ + clead = czero; /* Count of leading zeros */ + cdigits = 0; /* Count of digits in list. */ + + do + { + double d; + + fp *= 10; + /* Use modf here, not floor and subtract, so that + * the separation is done in one step. At the end + * of the loop don't break the number into parts so + * that the final digit is rounded. + */ + if (cdigits+czero-clead+1 < (int)precision) + fp = modf(fp, &d); + + else + { + d = floor(fp + .5); + + if (d > 9) + { + /* Rounding up to 10, handle that here. */ + if (czero > 0) + { + --czero, d = 1; + if (cdigits == 0) --clead; + } + else + { + while (cdigits > 0 && d > 9) + { + int ch = *--ascii; + + if (exp_b10 != (-1)) + ++exp_b10; + + else if (ch == 46) + { + ch = *--ascii, ++size; + /* Advance exp_b10 to '1', so that the + * decimal point happens after the + * previous digit. + */ + exp_b10 = 1; + } + + --cdigits; + d = ch - 47; /* I.e. 1+(ch-48) */ + } + + /* Did we reach the beginning? If so adjust the + * exponent but take into account the leading + * decimal point. + */ + if (d > 9) /* cdigits == 0 */ + { + if (exp_b10 == (-1)) + { + /* Leading decimal point (plus zeros?), if + * we lose the decimal point here it must + * be reentered below. + */ + int ch = *--ascii; + + if (ch == 46) + ++size, exp_b10 = 1; + + /* Else lost a leading zero, so 'exp_b10' is + * still ok at (-1) + */ + } + else + ++exp_b10; + + /* In all cases we output a '1' */ + d = 1; + } + } + } + fp = 0; /* Guarantees termination below. */ + } + + if (d == 0) + { + ++czero; + if (cdigits == 0) ++clead; + } + else + { + /* Included embedded zeros in the digit count. */ + cdigits += czero - clead; + clead = 0; + + while (czero > 0) + { + /* exp_b10 == (-1) means we just output the decimal + * place - after the DP don't adjust 'exp_b10' any + * more! + */ + if (exp_b10 != (-1)) + { + if (exp_b10 == 0) *ascii++ = 46, --size; + /* PLUS 1: TOTAL 4 */ + --exp_b10; + } + *ascii++ = 48, --czero; + } + + if (exp_b10 != (-1)) + { + if (exp_b10 == 0) *ascii++ = 46, --size; /* counted + above */ + --exp_b10; + } + *ascii++ = (char)(48 + (int)d), ++cdigits; + } + } + while (cdigits+czero-clead < (int)precision && fp > DBL_MIN); + + /* The total output count (max) is now 4+precision */ + + /* Check for an exponent, if we don't need one we are + * done and just need to terminate the string. At + * this point exp_b10==(-1) is effectively if flag - it got + * to '-1' because of the decrement after outputing + * the decimal point above (the exponent required is + * *not* -1!) + */ + if (exp_b10 >= (-1) && exp_b10 <= 2) + { + /* The following only happens if we didn't output the + * leading zeros above for negative exponent, so this + * doest add to the digit requirement. Note that the + * two zeros here can only be output if the two leading + * zeros were *not* output, so this doesn't increase + * the output count. + */ + while (--exp_b10 >= 0) *ascii++ = 48; + + *ascii = 0; + + /* Total buffer requirement (including the '\0') is + * 5+precision - see check at the start. + */ + return; + } + + /* Here if an exponent is required, adjust size for + * the digits we output but did not count. The total + * digit output here so far is at most 1+precision - no + * decimal point and no leading or trailing zeros have + * been output. + */ + size -= cdigits; + + *ascii++ = 69, --size; /* 'E': PLUS 1 TOTAL 2+precision */ + + /* The following use of an unsigned temporary avoids ambiguities in + * the signed arithmetic on exp_b10 and permits GCC at least to do + * better optimization. + */ + { + unsigned int uexp_b10; + + if (exp_b10 < 0) + { + *ascii++ = 45, --size; /* '-': PLUS 1 TOTAL 3+precision */ + uexp_b10 = -exp_b10; + } + + else + uexp_b10 = exp_b10; + + cdigits = 0; + + while (uexp_b10 > 0) + { + exponent[cdigits++] = (char)(48 + uexp_b10 % 10); + uexp_b10 /= 10; + } + } + + /* Need another size check here for the exponent digits, so + * this need not be considered above. + */ + if ((int)size > cdigits) + { + while (cdigits > 0) *ascii++ = exponent[--cdigits]; + + *ascii = 0; + + return; + } + } + } + else if (!(fp >= DBL_MIN)) + { + *ascii++ = 48; /* '0' */ + *ascii = 0; + return; + } + else + { + *ascii++ = 105; /* 'i' */ + *ascii++ = 110; /* 'n' */ + *ascii++ = 102; /* 'f' */ + *ascii = 0; + return; + } + } + + /* Here on buffer too small. */ + png_error(png_ptr, "ASCII conversion buffer too small"); +} + +# endif /* FLOATING_POINT */ + +# ifdef PNG_FIXED_POINT_SUPPORTED +/* Function to format a fixed point value in ASCII. + */ +void /* PRIVATE */ +png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, + png_fixed_point fp) +{ + /* Require space for 10 decimal digits, a decimal point, a minus sign and a + * trailing \0, 13 characters: + */ + if (size > 12) + { + png_uint_32 num; + + /* Avoid overflow here on the minimum integer. */ + if (fp < 0) + *ascii++ = 45, --size, num = -fp; + else + num = fp; + + if (num <= 0x80000000) /* else overflowed */ + { + unsigned int ndigits = 0, first = 16 /* flag value */; + char digits[10]; + + while (num) + { + /* Split the low digit off num: */ + unsigned int tmp = num/10; + num -= tmp*10; + digits[ndigits++] = (char)(48 + num); + /* Record the first non-zero digit, note that this is a number + * starting at 1, it's not actually the array index. + */ + if (first == 16 && num > 0) + first = ndigits; + num = tmp; + } + + if (ndigits > 0) + { + while (ndigits > 5) *ascii++ = digits[--ndigits]; + /* The remaining digits are fractional digits, ndigits is '5' or + * smaller at this point. It is certainly not zero. Check for a + * non-zero fractional digit: + */ + if (first <= 5) + { + unsigned int i; + *ascii++ = 46; /* decimal point */ + /* ndigits may be <5 for small numbers, output leading zeros + * then ndigits digits to first: + */ + i = 5; + while (ndigits < i) *ascii++ = 48, --i; + while (ndigits >= first) *ascii++ = digits[--ndigits]; + /* Don't output the trailing zeros! */ + } + } + else + *ascii++ = 48; + + /* And null terminate the string: */ + *ascii = 0; + return; + } + } + + /* Here on buffer too small. */ + png_error(png_ptr, "ASCII conversion buffer too small"); +} +# endif /* FIXED_POINT */ +#endif /* READ_SCAL */ + +#if defined(PNG_FLOATING_POINT_SUPPORTED) && \ + !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) +png_fixed_point +png_fixed(png_structp png_ptr, double fp, png_const_charp text) +{ + double r = floor(100000 * fp + .5); + + if (r > 2147483647. || r < -2147483648.) + png_fixed_error(png_ptr, text); + + return (png_fixed_point)r; +} +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || \ + defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED) +/* muldiv functions */ +/* This API takes signed arguments and rounds the result to the nearest + * integer (or, for a fixed point number - the standard argument - to + * the nearest .00001). Overflow and divide by zero are signalled in + * the result, a boolean - true on success, false on overflow. + */ +int +png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times, + png_int_32 divisor) +{ + /* Return a * times / divisor, rounded. */ + if (divisor != 0) + { + if (a == 0 || times == 0) + { + *res = 0; + return 1; + } + else + { +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = a; + r *= times; + r /= divisor; + r = floor(r+.5); + + /* A png_fixed_point is a 32-bit integer. */ + if (r <= 2147483647. && r >= -2147483648.) + { + *res = (png_fixed_point)r; + return 1; + } +#else + int negative = 0; + png_uint_32 A, T, D; + png_uint_32 s16, s32, s00; + + if (a < 0) + negative = 1, A = -a; + else + A = a; + + if (times < 0) + negative = !negative, T = -times; + else + T = times; + + if (divisor < 0) + negative = !negative, D = -divisor; + else + D = divisor; + + /* Following can't overflow because the arguments only + * have 31 bits each, however the result may be 32 bits. + */ + s16 = (A >> 16) * (T & 0xffff) + + (A & 0xffff) * (T >> 16); + /* Can't overflow because the a*times bit is only 30 + * bits at most. + */ + s32 = (A >> 16) * (T >> 16) + (s16 >> 16); + s00 = (A & 0xffff) * (T & 0xffff); + + s16 = (s16 & 0xffff) << 16; + s00 += s16; + + if (s00 < s16) + ++s32; /* carry */ + + if (s32 < D) /* else overflow */ + { + /* s32.s00 is now the 64-bit product, do a standard + * division, we know that s32 < D, so the maximum + * required shift is 31. + */ + int bitshift = 32; + png_fixed_point result = 0; /* NOTE: signed */ + + while (--bitshift >= 0) + { + png_uint_32 d32, d00; + + if (bitshift > 0) + d32 = D >> (32-bitshift), d00 = D << bitshift; + + else + d32 = 0, d00 = D; + + if (s32 > d32) + { + if (s00 < d00) --s32; /* carry */ + s32 -= d32, s00 -= d00, result += 1<= d00) + s32 = 0, s00 -= d00, result += 1<= (D >> 1)) + ++result; + + if (negative) + result = -result; + + /* Check for overflow. */ + if ((negative && result <= 0) || (!negative && result >= 0)) + { + *res = result; + return 1; + } + } +#endif + } + } + + return 0; +} +#endif /* READ_GAMMA || INCH_CONVERSIONS */ + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) +/* The following is for when the caller doesn't much care about the + * result. + */ +png_fixed_point +png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times, + png_int_32 divisor) +{ + png_fixed_point result; + + if (png_muldiv(&result, a, times, divisor)) + return result; + + png_warning(png_ptr, "fixed point overflow ignored"); + return 0; +} +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gammma */ +/* Calculate a reciprocal, return 0 on div-by-zero or overflow. */ +png_fixed_point +png_reciprocal(png_fixed_point a) +{ +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = floor(1E10/a+.5); + + if (r <= 2147483647. && r >= -2147483648.) + return (png_fixed_point)r; +#else + png_fixed_point res; + + if (png_muldiv(&res, 100000, 100000, a)) + return res; +#endif + + return 0; /* error/overflow */ +} + +/* A local convenience routine. */ +static png_fixed_point +png_product2(png_fixed_point a, png_fixed_point b) +{ + /* The required result is 1/a * 1/b; the following preserves accuracy. */ +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = a * 1E-5; + r *= b; + r = floor(r+.5); + + if (r <= 2147483647. && r >= -2147483648.) + return (png_fixed_point)r; +#else + png_fixed_point res; + + if (png_muldiv(&res, a, b, 100000)) + return res; +#endif + + return 0; /* overflow */ +} + +/* The inverse of the above. */ +png_fixed_point +png_reciprocal2(png_fixed_point a, png_fixed_point b) +{ + /* The required result is 1/a * 1/b; the following preserves accuracy. */ +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = 1E15/a; + r /= b; + r = floor(r+.5); + + if (r <= 2147483647. && r >= -2147483648.) + return (png_fixed_point)r; +#else + /* This may overflow because the range of png_fixed_point isn't symmetric, + * but this API is only used for the product of file and screen gamma so it + * doesn't matter that the smallest number it can produce is 1/21474, not + * 1/100000 + */ + png_fixed_point res = png_product2(a, b); + + if (res != 0) + return png_reciprocal(res); +#endif + + return 0; /* overflow */ +} +#endif /* READ_GAMMA */ + +#ifdef PNG_CHECK_cHRM_SUPPORTED +/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2, + * 2010: moved from pngset.c) */ +/* + * Multiply two 32-bit numbers, V1 and V2, using 32-bit + * arithmetic, to produce a 64-bit result in the HI/LO words. + * + * A B + * x C D + * ------ + * AD || BD + * AC || CB || 0 + * + * where A and B are the high and low 16-bit words of V1, + * C and D are the 16-bit words of V2, AD is the product of + * A and D, and X || Y is (X << 16) + Y. +*/ + +void /* PRIVATE */ +png_64bit_product (long v1, long v2, unsigned long *hi_product, + unsigned long *lo_product) +{ + int a, b, c, d; + long lo, hi, x, y; + + a = (v1 >> 16) & 0xffff; + b = v1 & 0xffff; + c = (v2 >> 16) & 0xffff; + d = v2 & 0xffff; + + lo = b * d; /* BD */ + x = a * d + c * b; /* AD + CB */ + y = ((lo >> 16) & 0xffff) + x; + + lo = (lo & 0xffff) | ((y & 0xffff) << 16); + hi = (y >> 16) & 0xffff; + + hi += a * c; /* AC */ + + *hi_product = (unsigned long)hi; + *lo_product = (unsigned long)lo; +} +#endif /* CHECK_cHRM */ + +#ifdef PNG_READ_GAMMA_SUPPORTED /* gamma table code */ +#ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED +/* Fixed point gamma. + * + * To calculate gamma this code implements fast log() and exp() calls using only + * fixed point arithmetic. This code has sufficient precision for either 8-bit + * or 16-bit sample values. + * + * The tables used here were calculated using simple 'bc' programs, but C double + * precision floating point arithmetic would work fine. The programs are given + * at the head of each table. + * + * 8-bit log table + * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to + * 255, so it's the base 2 logarithm of a normalized 8-bit floating point + * mantissa. The numbers are 32-bit fractions. + */ +static png_uint_32 +png_8bit_l2[128] = +{ +# if PNG_DO_BC + for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; } +# endif + 4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U, + 3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U, + 3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U, + 3455425220U, 3413129301U, 3371120137U, 3329393864U, 3287946700U, 3246774933U, + 3205874930U, 3165243125U, 3124876025U, 3084770202U, 3044922296U, 3005329011U, + 2965987113U, 2926893432U, 2888044853U, 2849438323U, 2811070844U, 2772939474U, + 2735041326U, 2697373562U, 2659933400U, 2622718104U, 2585724991U, 2548951424U, + 2512394810U, 2476052606U, 2439922311U, 2404001468U, 2368287663U, 2332778523U, + 2297471715U, 2262364947U, 2227455964U, 2192742551U, 2158222529U, 2123893754U, + 2089754119U, 2055801552U, 2022034013U, 1988449497U, 1955046031U, 1921821672U, + 1888774511U, 1855902668U, 1823204291U, 1790677560U, 1758320682U, 1726131893U, + 1694109454U, 1662251657U, 1630556815U, 1599023271U, 1567649391U, 1536433567U, + 1505374214U, 1474469770U, 1443718700U, 1413119487U, 1382670639U, 1352370686U, + 1322218179U, 1292211689U, 1262349810U, 1232631153U, 1203054352U, 1173618059U, + 1144320946U, 1115161701U, 1086139034U, 1057251672U, 1028498358U, 999877854U, + 971388940U, 943030410U, 914801076U, 886699767U, 858725327U, 830876614U, + 803152505U, 775551890U, 748073672U, 720716771U, 693480120U, 666362667U, + 639363374U, 612481215U, 585715177U, 559064263U, 532527486U, 506103872U, + 479792461U, 453592303U, 427502463U, 401522014U, 375650043U, 349885648U, + 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U, + 172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U, + 24347096U, 0U +#if 0 + /* The following are the values for 16-bit tables - these work fine for the + * 8-bit conversions but produce very slightly larger errors in the 16-bit + * log (about 1.2 as opposed to 0.7 absolute error in the final value). To + * use these all the shifts below must be adjusted appropriately. + */ + 65166, 64430, 63700, 62976, 62257, 61543, 60835, 60132, 59434, 58741, 58054, + 57371, 56693, 56020, 55352, 54689, 54030, 53375, 52726, 52080, 51439, 50803, + 50170, 49542, 48918, 48298, 47682, 47070, 46462, 45858, 45257, 44661, 44068, + 43479, 42894, 42312, 41733, 41159, 40587, 40020, 39455, 38894, 38336, 37782, + 37230, 36682, 36137, 35595, 35057, 34521, 33988, 33459, 32932, 32408, 31887, + 31369, 30854, 30341, 29832, 29325, 28820, 28319, 27820, 27324, 26830, 26339, + 25850, 25364, 24880, 24399, 23920, 23444, 22970, 22499, 22029, 21562, 21098, + 20636, 20175, 19718, 19262, 18808, 18357, 17908, 17461, 17016, 16573, 16132, + 15694, 15257, 14822, 14390, 13959, 13530, 13103, 12678, 12255, 11834, 11415, + 10997, 10582, 10168, 9756, 9346, 8937, 8531, 8126, 7723, 7321, 6921, 6523, + 6127, 5732, 5339, 4947, 4557, 4169, 3782, 3397, 3014, 2632, 2251, 1872, 1495, + 1119, 744, 372 +#endif +}; + +PNG_STATIC png_int_32 +png_log8bit(unsigned int x) +{ + unsigned int lg2 = 0; + /* Each time 'x' is multiplied by 2, 1 must be subtracted off the final log, + * because the log is actually negate that means adding 1. The final + * returned value thus has the range 0 (for 255 input) to 7.994 (for 1 + * input), return 7.99998 for the overflow (log 0) case - so the result is + * always at most 19 bits. + */ + if ((x &= 0xff) == 0) + return 0xffffffff; + + if ((x & 0xf0) == 0) + lg2 = 4, x <<= 4; + + if ((x & 0xc0) == 0) + lg2 += 2, x <<= 2; + + if ((x & 0x80) == 0) + lg2 += 1, x <<= 1; + + /* result is at most 19 bits, so this cast is safe: */ + return (png_int_32)((lg2 << 16) + ((png_8bit_l2[x-128]+32768)>>16)); +} + +/* The above gives exact (to 16 binary places) log2 values for 8-bit images, + * for 16-bit images we use the most significant 8 bits of the 16-bit value to + * get an approximation then multiply the approximation by a correction factor + * determined by the remaining up to 8 bits. This requires an additional step + * in the 16-bit case. + * + * We want log2(value/65535), we have log2(v'/255), where: + * + * value = v' * 256 + v'' + * = v' * f + * + * So f is value/v', which is equal to (256+v''/v') since v' is in the range 128 + * to 255 and v'' is in the range 0 to 255 f will be in the range 256 to less + * than 258. The final factor also needs to correct for the fact that our 8-bit + * value is scaled by 255, whereas the 16-bit values must be scaled by 65535. + * + * This gives a final formula using a calculated value 'x' which is value/v' and + * scaling by 65536 to match the above table: + * + * log2(x/257) * 65536 + * + * Since these numbers are so close to '1' we can use simple linear + * interpolation between the two end values 256/257 (result -368.61) and 258/257 + * (result 367.179). The values used below are scaled by a further 64 to give + * 16-bit precision in the interpolation: + * + * Start (256): -23591 + * Zero (257): 0 + * End (258): 23499 + */ +PNG_STATIC png_int_32 +png_log16bit(png_uint_32 x) +{ + unsigned int lg2 = 0; + + /* As above, but now the input has 16 bits. */ + if ((x &= 0xffff) == 0) + return 0xffffffff; + + if ((x & 0xff00) == 0) + lg2 = 8, x <<= 8; + + if ((x & 0xf000) == 0) + lg2 += 4, x <<= 4; + + if ((x & 0xc000) == 0) + lg2 += 2, x <<= 2; + + if ((x & 0x8000) == 0) + lg2 += 1, x <<= 1; + + /* Calculate the base logarithm from the top 8 bits as a 28-bit fractional + * value. + */ + lg2 <<= 28; + lg2 += (png_8bit_l2[(x>>8)-128]+8) >> 4; + + /* Now we need to interpolate the factor, this requires a division by the top + * 8 bits. Do this with maximum precision. + */ + x = ((x << 16) + (x >> 9)) / (x >> 8); + + /* Since we divided by the top 8 bits of 'x' there will be a '1' at 1<<24, + * the value at 1<<16 (ignoring this) will be 0 or 1; this gives us exactly + * 16 bits to interpolate to get the low bits of the result. Round the + * answer. Note that the end point values are scaled by 64 to retain overall + * precision and that 'lg2' is current scaled by an extra 12 bits, so adjust + * the overall scaling by 6-12. Round at every step. + */ + x -= 1U << 24; + + if (x <= 65536U) /* <= '257' */ + lg2 += ((23591U * (65536U-x)) + (1U << (16+6-12-1))) >> (16+6-12); + + else + lg2 -= ((23499U * (x-65536U)) + (1U << (16+6-12-1))) >> (16+6-12); + + /* Safe, because the result can't have more than 20 bits: */ + return (png_int_32)((lg2 + 2048) >> 12); +} + +/* The 'exp()' case must invert the above, taking a 20-bit fixed point + * logarithmic value and returning a 16 or 8-bit number as appropriate. In + * each case only the low 16 bits are relevant - the fraction - since the + * integer bits (the top 4) simply determine a shift. + * + * The worst case is the 16-bit distinction between 65535 and 65534, this + * requires perhaps spurious accuracty in the decoding of the logarithm to + * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance + * of getting this accuracy in practice. + * + * To deal with this the following exp() function works out the exponent of the + * frational part of the logarithm by using an accurate 32-bit value from the + * top four fractional bits then multiplying in the remaining bits. + */ +static png_uint_32 +png_32bit_exp[16] = +{ +# if PNG_DO_BC + for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; } +# endif + /* NOTE: the first entry is deliberately set to the maximum 32-bit value. */ + 4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U, + 3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U, + 2553802834U, 2445529972U, 2341847524U, 2242560872U +}; + +/* Adjustment table; provided to explain the numbers in the code below. */ +#if PNG_DO_BC +for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"} + 11 44937.64284865548751208448 + 10 45180.98734845585101160448 + 9 45303.31936980687359311872 + 8 45364.65110595323018870784 + 7 45395.35850361789624614912 + 6 45410.72259715102037508096 + 5 45418.40724413220722311168 + 4 45422.25021786898173001728 + 3 45424.17186732298419044352 + 2 45425.13273269940811464704 + 1 45425.61317555035558641664 + 0 45425.85339951654943850496 +#endif + +PNG_STATIC png_uint_32 +png_exp(png_fixed_point x) +{ + if (x > 0 && x <= 0xfffff) /* Else overflow or zero (underflow) */ + { + /* Obtain a 4-bit approximation */ + png_uint_32 e = png_32bit_exp[(x >> 12) & 0xf]; + + /* Incorporate the low 12 bits - these decrease the returned value by + * multiplying by a number less than 1 if the bit is set. The multiplier + * is determined by the above table and the shift. Notice that the values + * converge on 45426 and this is used to allow linear interpolation of the + * low bits. + */ + if (x & 0x800) + e -= (((e >> 16) * 44938U) + 16U) >> 5; + + if (x & 0x400) + e -= (((e >> 16) * 45181U) + 32U) >> 6; + + if (x & 0x200) + e -= (((e >> 16) * 45303U) + 64U) >> 7; + + if (x & 0x100) + e -= (((e >> 16) * 45365U) + 128U) >> 8; + + if (x & 0x080) + e -= (((e >> 16) * 45395U) + 256U) >> 9; + + if (x & 0x040) + e -= (((e >> 16) * 45410U) + 512U) >> 10; + + /* And handle the low 6 bits in a single block. */ + e -= (((e >> 16) * 355U * (x & 0x3fU)) + 256U) >> 9; + + /* Handle the upper bits of x. */ + e >>= x >> 16; + return e; + } + + /* Check for overflow */ + if (x <= 0) + return png_32bit_exp[0]; + + /* Else underflow */ + return 0; +} + +PNG_STATIC png_byte +png_exp8bit(png_fixed_point lg2) +{ + /* Get a 32-bit value: */ + png_uint_32 x = png_exp(lg2); + + /* Convert the 32-bit value to 0..255 by multiplying by 256-1, note that the + * second, rounding, step can't overflow because of the first, subtraction, + * step. + */ + x -= x >> 8; + return (png_byte)((x + 0x7fffffU) >> 24); +} + +PNG_STATIC png_uint_16 +png_exp16bit(png_fixed_point lg2) +{ + /* Get a 32-bit value: */ + png_uint_32 x = png_exp(lg2); + + /* Convert the 32-bit value to 0..65535 by multiplying by 65536-1: */ + x -= x >> 16; + return (png_uint_16)((x + 32767U) >> 16); +} +#endif /* FLOATING_ARITHMETIC */ + +png_byte +png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val) +{ + if (value > 0 && value < 255) + { +# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = floor(255*pow(value/255.,gamma_val*.00001)+.5); + return (png_byte)r; +# else + png_int_32 lg2 = png_log8bit(value); + png_fixed_point res; + + if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1)) + return png_exp8bit(res); + + /* Overflow. */ + value = 0; +# endif + } + + return (png_byte)value; +} + +png_uint_16 +png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val) +{ + if (value > 0 && value < 65535) + { +# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = floor(65535*pow(value/65535.,gamma_val*.00001)+.5); + return (png_uint_16)r; +# else + png_int_32 lg2 = png_log16bit(value); + png_fixed_point res; + + if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1)) + return png_exp16bit(res); + + /* Overflow. */ + value = 0; +# endif + } + + return (png_uint_16)value; +} + +/* This does the right thing based on the bit_depth field of the + * png_struct, interpreting values as 8-bit or 16-bit. While the result + * is nominally a 16-bit value if bit depth is 8 then the result is + * 8-bit (as are the arguments.) + */ +png_uint_16 /* PRIVATE */ +png_gamma_correct(png_structp png_ptr, unsigned int value, + png_fixed_point gamma_val) +{ + if (png_ptr->bit_depth == 8) + return png_gamma_8bit_correct(value, gamma_val); + + else + return png_gamma_16bit_correct(value, gamma_val); +} + +/* This is the shared test on whether a gamma value is 'significant' - whether + * it is worth doing gamma correction. + */ +int /* PRIVATE */ +png_gamma_significant(png_fixed_point gamma_val) +{ + return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED || + gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED; +} + +/* Internal function to build a single 16-bit table - the table consists of + * 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount + * to shift the input values right (or 16-number_of_signifiant_bits). + * + * The caller is responsible for ensuring that the table gets cleaned up on + * png_error (i.e. if one of the mallocs below fails) - i.e. the *table argument + * should be somewhere that will be cleaned. + */ +static void +png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable, + PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) +{ + /* Various values derived from 'shift': */ + PNG_CONST unsigned int num = 1U << (8U - shift); + PNG_CONST unsigned int max = (1U << (16U - shift))-1U; + PNG_CONST unsigned int max_by_2 = 1U << (15U-shift); + unsigned int i; + + png_uint_16pp table = *ptable = + (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); + + for (i = 0; i < num; i++) + { + png_uint_16p sub_table = table[i] = + (png_uint_16p)png_malloc(png_ptr, 256 * png_sizeof(png_uint_16)); + + /* The 'threshold' test is repeated here because it can arise for one of + * the 16-bit tables even if the others don't hit it. + */ + if (png_gamma_significant(gamma_val)) + { + /* The old code would overflow at the end and this would cause the + * 'pow' function to return a result >1, resulting in an + * arithmetic error. This code follows the spec exactly; ig is + * the recovered input sample, it always has 8-16 bits. + * + * We want input * 65535/max, rounded, the arithmetic fits in 32 + * bits (unsigned) so long as max <= 32767. + */ + unsigned int j; + for (j = 0; j < 256; j++) + { + png_uint_32 ig = (j << (8-shift)) + i; +# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + /* Inline the 'max' scaling operation: */ + double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5); + sub_table[j] = (png_uint_16)d; +# else + if (shift) + ig = (ig * 65535U + max_by_2)/max; + + sub_table[j] = png_gamma_16bit_correct(ig, gamma_val); +# endif + } + } + else + { + /* We must still build a table, but do it the fast way. */ + unsigned int j; + + for (j = 0; j < 256; j++) + { + png_uint_32 ig = (j << (8-shift)) + i; + + if (shift) + ig = (ig * 65535U + max_by_2)/max; + + sub_table[j] = (png_uint_16)ig; + } + } + } +} + +/* NOTE: this function expects the *inverse* of the overall gamma transformation + * required. + */ +static void +png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, + PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) +{ + PNG_CONST unsigned int num = 1U << (8U - shift); + PNG_CONST unsigned int max = (1U << (16U - shift))-1U; + unsigned int i; + png_uint_32 last; + + png_uint_16pp table = *ptable = + (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); + + /* 'num' is the number of tables and also the number of low bits of low + * bits of the input 16-bit value used to select a table. Each table is + * itself index by the high 8 bits of the value. + */ + for (i = 0; i < num; i++) + table[i] = (png_uint_16p)png_malloc(png_ptr, + 256 * png_sizeof(png_uint_16)); + + /* 'gamma_val' is set to the reciprocal of the value calculated above, so + * pow(out,g) is an *input* value. 'last' is the last input value set. + * + * In the loop 'i' is used to find output values. Since the output is + * 8-bit there are only 256 possible values. The tables are set up to + * select the closest possible output value for each input by finding + * the input value at the boundary between each pair of output values + * and filling the table up to that boundary with the lower output + * value. + * + * The boundary values are 0.5,1.5..253.5,254.5. Since these are 9-bit + * values the code below uses a 16-bit value in i; the values start at + * 128.5 (for 0.5) and step by 257, for a total of 254 values (the last + * entries are filled with 255). Start i at 128 and fill all 'last' + * table entries <= 'max' + */ + last = 0; + for (i = 0; i < 255; ++i) /* 8-bit output value */ + { + /* Find the corresponding maximum input value */ + png_uint_16 out = (png_uint_16)(i * 257U); /* 16-bit output value */ + + /* Find the boundary value in 16 bits: */ + png_uint_32 bound = png_gamma_16bit_correct(out+128U, gamma_val); + + /* Adjust (round) to (16-shift) bits: */ + bound = (bound * max + 32768U)/65535U + 1U; + + while (last < bound) + { + table[last & (0xffU >> shift)][last >> (8U - shift)] = out; + last++; + } + } + + /* And fill in the final entries. */ + while (last < (num << 8)) + { + table[last & (0xff >> shift)][last >> (8U - shift)] = 65535U; + last++; + } +} + +/* Build a single 8-bit table: same as the 16-bit case but much simpler (and + * typically much faster). Note that libpng currently does no sBIT processing + * (apparently contrary to the spec) so a 256 entry table is always generated. + */ +static void +png_build_8bit_table(png_structp png_ptr, png_bytepp ptable, + PNG_CONST png_fixed_point gamma_val) +{ + unsigned int i; + png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256); + + if (png_gamma_significant(gamma_val)) for (i=0; i<256; i++) + table[i] = png_gamma_8bit_correct(i, gamma_val); + + else for (i=0; i<256; ++i) + table[i] = (png_byte)i; +} + +/* Used from png_read_destroy and below to release the memory used by the gamma + * tables. + */ +void /* PRIVATE */ +png_destroy_gamma_table(png_structp png_ptr) +{ + png_free(png_ptr, png_ptr->gamma_table); + png_ptr->gamma_table = NULL; + + if (png_ptr->gamma_16_table != NULL) + { + int i; + int istop = (1 << (8 - png_ptr->gamma_shift)); + for (i = 0; i < istop; i++) + { + png_free(png_ptr, png_ptr->gamma_16_table[i]); + } + png_free(png_ptr, png_ptr->gamma_16_table); + png_ptr->gamma_16_table = NULL; + } + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) + png_free(png_ptr, png_ptr->gamma_from_1); + png_ptr->gamma_from_1 = NULL; + png_free(png_ptr, png_ptr->gamma_to_1); + png_ptr->gamma_to_1 = NULL; + + if (png_ptr->gamma_16_from_1 != NULL) + { + int i; + int istop = (1 << (8 - png_ptr->gamma_shift)); + for (i = 0; i < istop; i++) + { + png_free(png_ptr, png_ptr->gamma_16_from_1[i]); + } + png_free(png_ptr, png_ptr->gamma_16_from_1); + png_ptr->gamma_16_from_1 = NULL; + } + if (png_ptr->gamma_16_to_1 != NULL) + { + int i; + int istop = (1 << (8 - png_ptr->gamma_shift)); + for (i = 0; i < istop; i++) + { + png_free(png_ptr, png_ptr->gamma_16_to_1[i]); + } + png_free(png_ptr, png_ptr->gamma_16_to_1); + png_ptr->gamma_16_to_1 = NULL; + } +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ +} + +/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit + * tables, we don't make a full table if we are reducing to 8-bit in + * the future. Note also how the gamma_16 tables are segmented so that + * we don't need to allocate > 64K chunks for a full 16-bit table. + */ +void /* PRIVATE */ +png_build_gamma_table(png_structp png_ptr, int bit_depth) +{ + png_debug(1, "in png_build_gamma_table"); + + /* Remove any existing table; this copes with multiple calls to + * png_read_update_info. The warning is because building the gamma tables + * multiple times is a performance hit - it's harmless but the ability to call + * png_read_update_info() multiple times is new in 1.5.6 so it seems sensible + * to warn if the app introduces such a hit. + */ + if (png_ptr->gamma_table != NULL || png_ptr->gamma_16_table != NULL) + { + png_warning(png_ptr, "gamma table being rebuilt"); + png_destroy_gamma_table(png_ptr); + } + + if (bit_depth <= 8) + { + png_build_8bit_table(png_ptr, &png_ptr->gamma_table, + png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma) : PNG_FP_1); + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) + if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) + { + png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1, + png_reciprocal(png_ptr->gamma)); + + png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1, + png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : + png_ptr->gamma/* Probably doing rgb_to_gray */); + } +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ + } + else + { + png_byte shift, sig_bit; + + if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) + { + sig_bit = png_ptr->sig_bit.red; + + if (png_ptr->sig_bit.green > sig_bit) + sig_bit = png_ptr->sig_bit.green; + + if (png_ptr->sig_bit.blue > sig_bit) + sig_bit = png_ptr->sig_bit.blue; + } + else + sig_bit = png_ptr->sig_bit.gray; + + /* 16-bit gamma code uses this equation: + * + * ov = table[(iv & 0xff) >> gamma_shift][iv >> 8] + * + * Where 'iv' is the input color value and 'ov' is the output value - + * pow(iv, gamma). + * + * Thus the gamma table consists of up to 256 256 entry tables. The table + * is selected by the (8-gamma_shift) most significant of the low 8 bits of + * the color value then indexed by the upper 8 bits: + * + * table[low bits][high 8 bits] + * + * So the table 'n' corresponds to all those 'iv' of: + * + * ..<(n+1 << gamma_shift)-1> + * + */ + if (sig_bit > 0 && sig_bit < 16U) + shift = (png_byte)(16U - sig_bit); /* shift == insignificant bits */ + + else + shift = 0; /* keep all 16 bits */ + + if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) + { + /* PNG_MAX_GAMMA_8 is the number of bits to keep - effectively + * the significant bits in the *input* when the output will + * eventually be 8 bits. By default it is 11. + */ + if (shift < (16U - PNG_MAX_GAMMA_8)) + shift = (16U - PNG_MAX_GAMMA_8); + } + + if (shift > 8U) + shift = 8U; /* Guarantees at least one table! */ + + png_ptr->gamma_shift = shift; + +#ifdef PNG_16BIT_SUPPORTED + /* NOTE: prior to 1.5.4 this test used to include PNG_BACKGROUND (now + * PNG_COMPOSE). This effectively smashed the background calculation for + * 16-bit output because the 8-bit table assumes the result will be reduced + * to 8 bits. + */ + if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) +#endif + png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift, + png_ptr->screen_gamma > 0 ? png_product2(png_ptr->gamma, + png_ptr->screen_gamma) : PNG_FP_1); + +#ifdef PNG_16BIT_SUPPORTED + else + png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift, + png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma) : PNG_FP_1); +#endif + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) + if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) + { + png_build_16bit_table(png_ptr, &png_ptr->gamma_16_to_1, shift, + png_reciprocal(png_ptr->gamma)); + + /* Notice that the '16 from 1' table should be full precision, however + * the lookup on this table still uses gamma_shift, so it can't be. + * TODO: fix this. + */ + png_build_16bit_table(png_ptr, &png_ptr->gamma_16_from_1, shift, + png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : + png_ptr->gamma/* Probably doing rgb_to_gray */); + } +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ + } +} +#endif /* READ_GAMMA */ #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ diff --git a/src/png/png.h b/src/png/png.h index 805be120f5..aa2a1485e6 100644 --- a/src/png/png.h +++ b/src/png/png.h @@ -1,26 +1,26 @@ /* png.h - header file for PNG reference library * - * libpng version 1.4.4 - September 23, 2010 - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * libpng version 1.5.6 - November 3, 2011 + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * * This code is released under the libpng license (See LICENSE, below) * * Authors and maintainers: - * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat - * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger - * libpng versions 0.97, January 1998, through 1.4.4 - September 23, 2010: Glenn - * See also "Contributing Authors", below. + * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat + * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger + * libpng versions 0.97, January 1998, through 1.5.6 - November 3, 2011: Glenn + * See also "Contributing Authors", below. * * Note about libpng version numbers: * - * Due to various miscommunications, unforeseen code incompatibilities - * and occasional factors outside the authors' control, version numbering - * on the library has not always been consistent and straightforward. - * The following table summarizes matters since version 0.89c, which was - * the first widely used release: + * Due to various miscommunications, unforeseen code incompatibilities + * and occasional factors outside the authors' control, version numbering + * on the library has not always been consistent and straightforward. + * The following table summarizes matters since version 0.89c, which was + * the first widely used release: * * source png.h png.h shared-lib * version string int version @@ -137,37 +137,53 @@ * 1.4.1beta01-03 14 10401 14.so.14.1[.0] * 1.4.1rc01 14 10401 14.so.14.1[.0] * 1.4.1beta04-12 14 10401 14.so.14.1[.0] - * 1.4.1rc02-04 14 10401 14.so.14.1[.0] * 1.4.1 14 10401 14.so.14.1[.0] - * 1.4.2beta01 14 10402 14.so.14.2[.0] - * 1.4.2rc02-06 14 10402 14.so.14.2[.0] * 1.4.2 14 10402 14.so.14.2[.0] - * 1.4.3beta01-05 14 10403 14.so.14.3[.0] - * 1.4.3rc01-03 14 10403 14.so.14.3[.0] * 1.4.3 14 10403 14.so.14.3[.0] - * 1.4.4beta01-08 14 10404 14.so.14.4[.0] - * 1.4.4rc01-06 14 10404 14.so.14.4[.0] + * 1.4.4 14 10404 14.so.14.4[.0] + * 1.5.0beta01-58 15 10500 15.so.15.0[.0] + * 1.5.0rc01-07 15 10500 15.so.15.0[.0] + * 1.5.0 15 10500 15.so.15.0[.0] + * 1.5.1beta01-11 15 10501 15.so.15.1[.0] + * 1.5.1rc01-02 15 10501 15.so.15.1[.0] + * 1.5.1 15 10501 15.so.15.1[.0] + * 1.5.2beta01-03 15 10502 15.so.15.2[.0] + * 1.5.2rc01-03 15 10502 15.so.15.2[.0] + * 1.5.2 15 10502 15.so.15.2[.0] + * 1.5.3beta01-10 15 10503 15.so.15.3[.0] + * 1.5.3rc01-02 15 10503 15.so.15.3[.0] + * 1.5.3beta11 15 10503 15.so.15.3[.0] + * 1.5.3 [omitted] + * 1.5.4beta01-08 15 10504 15.so.15.4[.0] + * 1.5.4rc01 15 10504 15.so.15.4[.0] + * 1.5.4 15 10504 15.so.15.4[.0] + * 1.5.5beta01-08 15 10505 15.so.15.5[.0] + * 1.5.5rc01 15 10505 15.so.15.5[.0] + * 1.5.5 15 10505 15.so.15.5[.0] + * 1.5.6beta01-07 15 10506 15.so.15.6[.0] + * 1.5.6rc01-03 15 10506 15.so.15.6[.0] + * 1.5.6 15 10506 15.so.15.6[.0] * - * Henceforth the source version will match the shared-library major - * and minor numbers; the shared-library major version number will be - * used for changes in backward compatibility, as it is intended. The - * PNG_LIBPNG_VER macro, which is not used within libpng but is available - * for applications, is an unsigned integer of the form xyyzz corresponding - * to the source version x.y.z (leading zeros in y and z). Beta versions - * were given the previous public release number plus a letter, until - * version 1.0.6j; from then on they were given the upcoming public - * release number plus "betaNN" or "rcN". + * Henceforth the source version will match the shared-library major + * and minor numbers; the shared-library major version number will be + * used for changes in backward compatibility, as it is intended. The + * PNG_LIBPNG_VER macro, which is not used within libpng but is available + * for applications, is an unsigned integer of the form xyyzz corresponding + * to the source version x.y.z (leading zeros in y and z). Beta versions + * were given the previous public release number plus a letter, until + * version 1.0.6j; from then on they were given the upcoming public + * release number plus "betaNN" or "rcN". * - * Binary incompatibility exists only when applications make direct access - * to the info_ptr or png_ptr members through png.h, and the compiled - * application is loaded with a different version of the library. + * Binary incompatibility exists only when applications make direct access + * to the info_ptr or png_ptr members through png.h, and the compiled + * application is loaded with a different version of the library. * - * DLLNUM will change each time there are forward or backward changes - * in binary compatibility (e.g., when a new feature is added). + * DLLNUM will change each time there are forward or backward changes + * in binary compatibility (e.g., when a new feature is added). * - * See libpng.txt or libpng.3 for more information. The PNG specification - * is available as a W3C Recommendation and as an ISO Specification, - * +# endif + + /* Need the time information for converting tIME chunks, it + * defines struct tm: + */ +# ifdef PNG_CONVERT_tIME_SUPPORTED + /* "time.h" functions are not supported on all operating systems */ +# include +# endif +# endif + +/* Machine specific configuration. */ +# include "pngconf.h" +#endif /* * Added at libpng-1.2.8 @@ -416,13 +456,13 @@ * StringFileInfo block must contain a SpecialBuild string. */ -#ifdef PNG_USER_PRIVATEBUILD +#ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */ # define PNG_LIBPNG_BUILD_TYPE \ - (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) + (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) #else # ifdef PNG_LIBPNG_SPECIALBUILD # define PNG_LIBPNG_BUILD_TYPE \ - (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) + (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) # else # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) # endif @@ -435,20 +475,61 @@ extern "C" { #endif /* __cplusplus */ -/* This file is arranged in several sections. The first section contains - * structure and type definitions. The second section contains the external - * library functions, while the third has the internal library functions, - * which applications aren't expected to use directly. - */ - -/* Variables declared in png.c - only it needs to define PNG_NO_EXTERN */ -#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) /* Version information for C files, stored in png.c. This had better match * the version above. */ #define png_libpng_ver png_get_header_ver(NULL) -#endif /* PNG_NO_EXTERN */ +/* This file is arranged in several sections: + * + * 1. Any configuration options that can be specified by for the application + * code when it is built. (Build time configuration is in pnglibconf.h) + * 2. Type definitions (base types are defined in pngconf.h), structure + * definitions. + * 3. Exported library functions. + * + * The library source code has additional files (principally pngpriv.h) that + * allow configuration of the library. + */ +/* Section 1: run time configuration + * See pnglibconf.h for build time configuration + * + * Run time configuration allows the application to choose between + * implementations of certain arithmetic APIs. The default is set + * at build time and recorded in pnglibconf.h, but it is safe to + * override these (and only these) settings. Note that this won't + * change what the library does, only application code, and the + * settings can (and probably should) be made on a per-file basis + * by setting the #defines before including png.h + * + * Use macros to read integers from PNG data or use the exported + * functions? + * PNG_USE_READ_MACROS: use the macros (see below) Note that + * the macros evaluate their argument multiple times. + * PNG_NO_USE_READ_MACROS: call the relevant library function. + * + * Use the alternative algorithm for compositing alpha samples that + * does not use division? + * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' + * algorithm. + * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. + * + * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is + * false? + * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error + * APIs to png_warning. + * Otherwise the calls are mapped to png_error. + */ + +/* Section 2: type definitions, including structures and compile time + * constants. + * See pngconf.h for base types that vary by machine/system + */ + +/* This triggers a compiler error in png.c, if png.c and png.h + * do not agree upon the version number. + */ +typedef char* png_libpng_version_1_5_6; /* Three color definitions. The order of the red, green, and blue, (and the * exact size) is not important, although the size of the fields need to @@ -461,6 +542,7 @@ typedef struct png_color_struct png_byte blue; } png_color; typedef png_color FAR * png_colorp; +typedef PNG_CONST png_color FAR * png_const_colorp; typedef png_color FAR * FAR * png_colorpp; typedef struct png_color_16_struct @@ -472,6 +554,7 @@ typedef struct png_color_16_struct png_uint_16 gray; /* for use in grayscale files */ } png_color_16; typedef png_color_16 FAR * png_color_16p; +typedef PNG_CONST png_color_16 FAR * png_const_color_16p; typedef png_color_16 FAR * FAR * png_color_16pp; typedef struct png_color_8_struct @@ -483,6 +566,7 @@ typedef struct png_color_8_struct png_byte alpha; /* for alpha channel files */ } png_color_8; typedef png_color_8 FAR * png_color_8p; +typedef PNG_CONST png_color_8 FAR * png_const_color_8p; typedef png_color_8 FAR * FAR * png_color_8pp; /* @@ -498,6 +582,7 @@ typedef struct png_sPLT_entry_struct png_uint_16 frequency; } png_sPLT_entry; typedef png_sPLT_entry FAR * png_sPLT_entryp; +typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; /* When the depth of the sPLT palette is 8 bits, the color and alpha samples @@ -513,6 +598,7 @@ typedef struct png_sPLT_struct png_int_32 nentries; /* number of palette entries */ } png_sPLT_t; typedef png_sPLT_t FAR * png_sPLT_tp; +typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; #ifdef PNG_TEXT_SUPPORTED @@ -520,7 +606,7 @@ typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; * and whether that contents is compressed or not. The "key" field * points to a regular zero-terminated C string. The "text", "lang", and * "lang_key" fields can be regular C strings, empty strings, or NULL pointers. - * However, the * structure returned by png_get_text() will always contain + * However, the structure returned by png_get_text() will always contain * regular zero-terminated C strings (possibly empty), never NULL pointers, * so they can be safely used in printf() and other string-handling functions. */ @@ -535,15 +621,14 @@ typedef struct png_text_struct png_charp text; /* comment, may be an empty string (ie "") or a NULL pointer */ png_size_t text_length; /* length of the text string */ -#ifdef PNG_iTXt_SUPPORTED png_size_t itxt_length; /* length of the itxt string */ png_charp lang; /* language code, 0-79 characters or a NULL pointer */ png_charp lang_key; /* keyword translated UTF-8 string, 0 or more chars or a NULL pointer */ -#endif } png_text; typedef png_text FAR * png_textp; +typedef PNG_CONST png_text FAR * png_const_textp; typedef png_text FAR * FAR * png_textpp; #endif @@ -573,10 +658,11 @@ typedef struct png_time_struct png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ } png_time; typedef png_time FAR * png_timep; +typedef PNG_CONST png_time FAR * png_const_timep; typedef png_time FAR * FAR * png_timepp; #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ - defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) + defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) /* png_unknown_chunk is a structure to hold queued chunks for which there is * no specific support. The idea is that we can use this to queue * up private chunks for output even though the library doesn't actually @@ -591,314 +677,27 @@ typedef struct png_unknown_chunk_t /* libpng-using applications should NOT directly modify this byte. */ png_byte location; /* mode of operation at read time */ } + + png_unknown_chunk; typedef png_unknown_chunk FAR * png_unknown_chunkp; +typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; #endif -/* png_info is a structure that holds the information in a PNG file so - * that the application can find out the characteristics of the image. - * If you are reading the file, this structure will tell you what is - * in the PNG file. If you are writing the file, fill in the information - * you want to put into the PNG file, then call png_write_info(). - * The names chosen should be very close to the PNG specification, so - * consult that document for information about the meaning of each field. - * - * With libpng < 0.95, it was only possible to directly set and read the - * the values in the png_info_struct, which meant that the contents and - * order of the values had to remain fixed. With libpng 0.95 and later, - * however, there are now functions that abstract the contents of - * png_info_struct from the application, so this makes it easier to use - * libpng with dynamic libraries, and even makes it possible to use - * libraries that don't have all of the libpng ancillary chunk-handing - * functionality. - * - * In any case, the order of the parameters in png_info_struct should NOT - * be changed for as long as possible to keep compatibility with applications - * that use the old direct-access method with png_info_struct. - * - * The following members may have allocated storage attached that should be - * cleaned up before the structure is discarded: palette, trans, text, - * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile, - * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these - * are automatically freed when the info structure is deallocated, if they were - * allocated internally by libpng. This behavior can be changed by means - * of the png_data_freer() function. - * - * More allocation details: all the chunk-reading functions that - * change these members go through the corresponding png_set_* - * functions. A function to clear these members is available: see - * png_free_data(). The png_set_* functions do not depend on being - * able to point info structure members to any of the storage they are - * passed (they make their own copies), EXCEPT that the png_set_text - * functions use the same storage passed to them in the text_ptr or - * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns - * functions do not make their own copies. - */ -typedef struct png_info_struct -{ - /* the following are necessary for every PNG file */ - png_uint_32 width PNG_DEPSTRUCT; /* width of image in pixels (from IHDR) */ - png_uint_32 height PNG_DEPSTRUCT; /* height of image in pixels (from IHDR) */ - png_uint_32 valid PNG_DEPSTRUCT; /* valid chunk data (see PNG_INFO_ - below) */ - png_size_t rowbytes PNG_DEPSTRUCT; /* bytes needed to hold an untransformed - row */ - png_colorp palette PNG_DEPSTRUCT; /* array of color values - (valid & PNG_INFO_PLTE) */ - png_uint_16 num_palette PNG_DEPSTRUCT; /* number of color entries in - "palette" (PLTE) */ - png_uint_16 num_trans PNG_DEPSTRUCT; /* number of transparent palette - color (tRNS) */ - png_byte bit_depth PNG_DEPSTRUCT; /* 1, 2, 4, 8, or 16 bits/channel - (from IHDR) */ - png_byte color_type PNG_DEPSTRUCT; /* see PNG_COLOR_TYPE_ below - (from IHDR) */ - /* The following three should have been named *_method not *_type */ - png_byte compression_type PNG_DEPSTRUCT; /* must be - PNG_COMPRESSION_TYPE_BASE (IHDR) */ - png_byte filter_type PNG_DEPSTRUCT; /* must be PNG_FILTER_TYPE_BASE - (from IHDR) */ - png_byte interlace_type PNG_DEPSTRUCT; /* One of PNG_INTERLACE_NONE, - PNG_INTERLACE_ADAM7 */ - - /* The following is informational only on read, and not used on writes. */ - png_byte channels PNG_DEPSTRUCT; /* number of data channels per - pixel (1, 2, 3, 4) */ - png_byte pixel_depth PNG_DEPSTRUCT; /* number of bits per pixel */ - png_byte spare_byte PNG_DEPSTRUCT; /* to align the data, and for - future use */ - png_byte signature[8] PNG_DEPSTRUCT; /* magic bytes read by libpng - from start of file */ - - /* The rest of the data is optional. If you are reading, check the - * valid field to see if the information in these are valid. If you - * are writing, set the valid field to those chunks you want written, - * and initialize the appropriate fields below. - */ - -#if defined(PNG_gAMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED) - /* The gAMA chunk describes the gamma characteristics of the system - * on which the image was created, normally in the range [1.0, 2.5]. - * Data is valid if (valid & PNG_INFO_gAMA) is non-zero. - */ - float gamma PNG_DEPSTRUCT; /* gamma value of image, - if (valid & PNG_INFO_gAMA) */ -#endif - -#ifdef PNG_sRGB_SUPPORTED - /* GR-P, 0.96a */ - /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */ - png_byte srgb_intent PNG_DEPSTRUCT; /* sRGB rendering intent - [0, 1, 2, or 3] */ -#endif - -#ifdef PNG_TEXT_SUPPORTED - /* The tEXt, and zTXt chunks contain human-readable textual data in - * uncompressed, compressed, and optionally compressed forms, respectively. - * The data in "text" is an array of pointers to uncompressed, - * null-terminated C strings. Each chunk has a keyword that describes the - * textual data contained in that chunk. Keywords are not required to be - * unique, and the text string may be empty. Any number of text chunks may - * be in an image. - */ - int num_text PNG_DEPSTRUCT; /* number of comments read/to write */ - int max_text PNG_DEPSTRUCT; /* current size of text array */ - png_textp text PNG_DEPSTRUCT; /* array of comments read/to write */ -#endif /* PNG_TEXT_SUPPORTED */ - -#ifdef PNG_tIME_SUPPORTED - /* The tIME chunk holds the last time the displayed image data was - * modified. See the png_time struct for the contents of this struct. - */ - png_time mod_time PNG_DEPSTRUCT; -#endif - -#ifdef PNG_sBIT_SUPPORTED - /* The sBIT chunk specifies the number of significant high-order bits - * in the pixel data. Values are in the range [1, bit_depth], and are - * only specified for the channels in the pixel data. The contents of - * the low-order bits is not specified. Data is valid if - * (valid & PNG_INFO_sBIT) is non-zero. - */ - png_color_8 sig_bit PNG_DEPSTRUCT; /* significant bits in color channels */ -#endif - -#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \ -defined(PNG_READ_BACKGROUND_SUPPORTED) - /* The tRNS chunk supplies transparency data for paletted images and - * other image types that don't need a full alpha channel. There are - * "num_trans" transparency values for a paletted image, stored in the - * same order as the palette colors, starting from index 0. Values - * for the data are in the range [0, 255], ranging from fully transparent - * to fully opaque, respectively. For non-paletted images, there is a - * single color specified that should be treated as fully transparent. - * Data is valid if (valid & PNG_INFO_tRNS) is non-zero. - */ - png_bytep trans_alpha PNG_DEPSTRUCT; /* alpha values for paletted - image */ - png_color_16 trans_color PNG_DEPSTRUCT; /* transparent color for - non-palette image */ -#endif - -#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - /* The bKGD chunk gives the suggested image background color if the - * display program does not have its own background color and the image - * is needs to composited onto a background before display. The colors - * in "background" are normally in the same color space/depth as the - * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero. - */ - png_color_16 background PNG_DEPSTRUCT; -#endif - -#ifdef PNG_oFFs_SUPPORTED - /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards - * and downwards from the top-left corner of the display, page, or other - * application-specific co-ordinate space. See the PNG_OFFSET_ defines - * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero. - */ - png_int_32 x_offset PNG_DEPSTRUCT; /* x offset on page */ - png_int_32 y_offset PNG_DEPSTRUCT; /* y offset on page */ - png_byte offset_unit_type PNG_DEPSTRUCT; /* offset units type */ -#endif - -#ifdef PNG_pHYs_SUPPORTED - /* The pHYs chunk gives the physical pixel density of the image for - * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_ - * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero. - */ - png_uint_32 x_pixels_per_unit PNG_DEPSTRUCT; /* horizontal pixel density */ - png_uint_32 y_pixels_per_unit PNG_DEPSTRUCT; /* vertical pixel density */ - png_byte phys_unit_type PNG_DEPSTRUCT; /* resolution type (see - PNG_RESOLUTION_ below) */ -#endif - -#ifdef PNG_hIST_SUPPORTED - /* The hIST chunk contains the relative frequency or importance of the - * various palette entries, so that a viewer can intelligently select a - * reduced-color palette, if required. Data is an array of "num_palette" - * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST) - * is non-zero. - */ - png_uint_16p hist PNG_DEPSTRUCT; -#endif - -#ifdef PNG_cHRM_SUPPORTED - /* The cHRM chunk describes the CIE color characteristics of the monitor - * on which the PNG was created. This data allows the viewer to do gamut - * mapping of the input image to ensure that the viewer sees the same - * colors in the image as the creator. Values are in the range - * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero. - */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - float x_white PNG_DEPSTRUCT; - float y_white PNG_DEPSTRUCT; - float x_red PNG_DEPSTRUCT; - float y_red PNG_DEPSTRUCT; - float x_green PNG_DEPSTRUCT; - float y_green PNG_DEPSTRUCT; - float x_blue PNG_DEPSTRUCT; - float y_blue PNG_DEPSTRUCT; -#endif -#endif - -#ifdef PNG_pCAL_SUPPORTED - /* The pCAL chunk describes a transformation between the stored pixel - * values and original physical data values used to create the image. - * The integer range [0, 2^bit_depth - 1] maps to the floating-point - * range given by [pcal_X0, pcal_X1], and are further transformed by a - * (possibly non-linear) transformation function given by "pcal_type" - * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_ - * defines below, and the PNG-Group's PNG extensions document for a - * complete description of the transformations and how they should be - * implemented, and for a description of the ASCII parameter strings. - * Data values are valid if (valid & PNG_INFO_pCAL) non-zero. - */ - png_charp pcal_purpose PNG_DEPSTRUCT; /* pCAL chunk description string */ - png_int_32 pcal_X0 PNG_DEPSTRUCT; /* minimum value */ - png_int_32 pcal_X1 PNG_DEPSTRUCT; /* maximum value */ - png_charp pcal_units PNG_DEPSTRUCT; /* Latin-1 string giving physical - units */ - png_charpp pcal_params PNG_DEPSTRUCT; /* ASCII strings containing - parameter values */ - png_byte pcal_type PNG_DEPSTRUCT; /* equation type - (see PNG_EQUATION_ below) */ - png_byte pcal_nparams PNG_DEPSTRUCT; /* number of parameters given - in pcal_params */ -#endif - -/* New members added in libpng-1.0.6 */ - png_uint_32 free_me PNG_DEPSTRUCT; /* flags items libpng is - responsible for freeing */ - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ - defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) - /* Storage for unknown chunks that the library doesn't recognize. */ - png_unknown_chunkp unknown_chunks PNG_DEPSTRUCT; - png_size_t unknown_chunks_num PNG_DEPSTRUCT; -#endif - -#ifdef PNG_iCCP_SUPPORTED - /* iCCP chunk data. */ - png_charp iccp_name PNG_DEPSTRUCT; /* profile name */ - png_charp iccp_profile PNG_DEPSTRUCT; /* International Color Consortium - profile data */ - /* Note to maintainer: should be png_bytep */ - png_uint_32 iccp_proflen PNG_DEPSTRUCT; /* ICC profile data length */ - png_byte iccp_compression PNG_DEPSTRUCT; /* Always zero */ -#endif - -#ifdef PNG_sPLT_SUPPORTED - /* Data on sPLT chunks (there may be more than one). */ - png_sPLT_tp splt_palettes PNG_DEPSTRUCT; - png_uint_32 splt_palettes_num PNG_DEPSTRUCT; -#endif - -#ifdef PNG_sCAL_SUPPORTED - /* The sCAL chunk describes the actual physical dimensions of the - * subject matter of the graphic. The chunk contains a unit specification - * a byte value, and two ASCII strings representing floating-point - * values. The values are width and height corresponsing to one pixel - * in the image. This external representation is converted to double - * here. Data values are valid if (valid & PNG_INFO_sCAL) is non-zero. - */ - png_byte scal_unit PNG_DEPSTRUCT; /* unit of physical scale */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - double scal_pixel_width PNG_DEPSTRUCT; /* width of one pixel */ - double scal_pixel_height PNG_DEPSTRUCT; /* height of one pixel */ -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_charp scal_s_width PNG_DEPSTRUCT; /* string containing height */ - png_charp scal_s_height PNG_DEPSTRUCT; /* string containing width */ -#endif -#endif - -#ifdef PNG_INFO_IMAGE_SUPPORTED - /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS) - non-zero */ - /* Data valid if (valid & PNG_INFO_IDAT) non-zero */ - png_bytepp row_pointers PNG_DEPSTRUCT; /* the image bits */ -#endif - -#if defined(PNG_FIXED_POINT_SUPPORTED) && defined(PNG_gAMA_SUPPORTED) - png_fixed_point int_gamma PNG_DEPSTRUCT; /* gamma of image, - if (valid & PNG_INFO_gAMA) */ -#endif - -#if defined(PNG_cHRM_SUPPORTED) && defined(PNG_FIXED_POINT_SUPPORTED) - png_fixed_point int_x_white PNG_DEPSTRUCT; - png_fixed_point int_y_white PNG_DEPSTRUCT; - png_fixed_point int_x_red PNG_DEPSTRUCT; - png_fixed_point int_y_red PNG_DEPSTRUCT; - png_fixed_point int_x_green PNG_DEPSTRUCT; - png_fixed_point int_y_green PNG_DEPSTRUCT; - png_fixed_point int_x_blue PNG_DEPSTRUCT; - png_fixed_point int_y_blue PNG_DEPSTRUCT; -#endif +/* Values for the unknown chunk location byte */ -} png_info; +#define PNG_HAVE_IHDR 0x01 +#define PNG_HAVE_PLTE 0x02 +#define PNG_AFTER_IDAT 0x08 +/* The complete definition of png_info has, as of libpng-1.5.0, + * been moved into a separate header file that is not accessible to + * applications. Read libpng-manual.txt or libpng.3 for more info. + */ +typedef struct png_info_def png_info; typedef png_info FAR * png_infop; +typedef PNG_CONST png_info FAR * png_const_infop; typedef png_info FAR * FAR * png_infopp; /* Maximum positive integer used in PNG is (2^31)-1 */ @@ -906,6 +705,14 @@ typedef png_info FAR * FAR * png_infopp; #define PNG_UINT_32_MAX ((png_uint_32)(-1)) #define PNG_SIZE_MAX ((png_size_t)(-1)) +/* These are constants for fixed point values encoded in the + * PNG specification manner (x100000) + */ +#define PNG_FP_1 100000 +#define PNG_FP_HALF 50000 +#define PNG_FP_MAX ((png_fixed_point)0x7fffffffL) +#define PNG_FP_MIN (-PNG_FP_MAX) + /* These describe the color_type field in png_info. */ /* color type masks */ #define PNG_COLOR_MASK_PALETTE 1 @@ -992,7 +799,7 @@ typedef png_info FAR * FAR * png_infopp; #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ -#define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ +#define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ /* This is used for the transformation routines, as some of them * change these values for the row. It also should enable using @@ -1000,61 +807,86 @@ typedef png_info FAR * FAR * png_infopp; */ typedef struct png_row_info_struct { - png_uint_32 width; /* width of row */ - png_size_t rowbytes; /* number of bytes in row */ - png_byte color_type; /* color type of row */ - png_byte bit_depth; /* bit depth of row */ - png_byte channels; /* number of channels (1, 2, 3, or 4) */ + png_uint_32 width; /* width of row */ + png_size_t rowbytes; /* number of bytes in row */ + png_byte color_type; /* color type of row */ + png_byte bit_depth; /* bit depth of row */ + png_byte channels; /* number of channels (1, 2, 3, or 4) */ png_byte pixel_depth; /* bits per pixel (depth * channels) */ } png_row_info; typedef png_row_info FAR * png_row_infop; typedef png_row_info FAR * FAR * png_row_infopp; +/* The complete definition of png_struct has, as of libpng-1.5.0, + * been moved into a separate header file that is not accessible to + * applications. Read libpng-manual.txt or libpng.3 for more info. + */ +typedef struct png_struct_def png_struct; +typedef PNG_CONST png_struct FAR * png_const_structp; +typedef png_struct FAR * png_structp; + /* These are the function types for the I/O functions and for the functions * that allow the user to override the default I/O functions with his or her * own. The png_error_ptr type should match that of user-supplied warning * and error functions, while the png_rw_ptr type should match that of the - * user read/write data functions. + * user read/write data functions. Note that the 'write' function must not + * modify the buffer it is passed. The 'read' function, on the other hand, is + * expected to return the read data in the buffer. */ -typedef struct png_struct_def png_struct; -typedef png_struct FAR * png_structp; - -typedef void (PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp)); -typedef void (PNGAPI *png_rw_ptr) PNGARG((png_structp, png_bytep, png_size_t)); -typedef void (PNGAPI *png_flush_ptr) PNGARG((png_structp)); -typedef void (PNGAPI *png_read_status_ptr) PNGARG((png_structp, png_uint_32, - int)); -typedef void (PNGAPI *png_write_status_ptr) PNGARG((png_structp, png_uint_32, - int)); +typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp)); +typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t)); +typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp)); +typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, + int)); +typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, + int)); #ifdef PNG_PROGRESSIVE_READ_SUPPORTED -typedef void (PNGAPI *png_progressive_info_ptr) PNGARG((png_structp, - png_infop)); -typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop)); -typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep, - png_uint_32, int)); +typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop)); +typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop)); + +/* The following callback receives png_uint_32 row_number, int pass for the + * png_bytep data of the row. When transforming an interlaced image the + * row number is the row number within the sub-image of the interlace pass, so + * the value will increase to the height of the sub-image (not the full image) + * then reset to 0 for the next pass. + * + * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to + * find the output pixel (x,y) given an interlaced sub-image pixel + * (row,col,pass). (See below for these macros.) + */ +typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep, + png_uint_32, int)); #endif #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) -typedef void (PNGAPI *png_user_transform_ptr) PNGARG((png_structp, - png_row_infop, png_bytep)); +typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop, + png_bytep)); #endif #ifdef PNG_USER_CHUNKS_SUPPORTED -typedef int (PNGAPI *png_user_chunk_ptr) PNGARG((png_structp, - png_unknown_chunkp)); +typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, + png_unknown_chunkp)); #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp)); +typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); #endif + #ifdef PNG_SETJMP_SUPPORTED -/* This must match the function definition in , and the - * application must include this before png.h to obtain the definition - * of jmp_buf. +/* This must match the function definition in , and the application + * must include this before png.h to obtain the definition of jmp_buf. The + * function is required to be PNG_NORETURN, but this is not checked. If the + * function does return the application will crash via an abort() or similar + * system level call. + * + * If you get a warning here while building the library you may need to make + * changes to ensure that pnglibconf.h records the calling convention used by + * your compiler. This may be very difficult - try using a different compiler + * to build the library! */ -typedef void (PNGAPI *png_longjmp_ptr) PNGARG((jmp_buf, int)); +PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef); #endif /* Transform masks for the high-level interface */ @@ -1076,453 +908,94 @@ typedef void (PNGAPI *png_longjmp_ptr) PNGARG((jmp_buf, int)); #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ /* Added to libpng-1.4.0 */ #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ +/* Added to libpng-1.5.4 */ +#define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */ +#define PNG_TRANSFORM_SCALE_16 0x8000 /* read only */ /* Flags for MNG supported features */ #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 #define PNG_FLAG_MNG_FILTER_64 0x04 #define PNG_ALL_MNG_FEATURES 0x05 -typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_alloc_size_t)); -typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp)); - -/* The structure that holds the information to read and write PNG files. - * The only people who need to care about what is inside of this are the - * people who will be modifying the library for their own special needs. - * It should NOT be accessed directly by an application, except to store - * the jmp_buf. - */ - -struct png_struct_def -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf jmpbuf PNG_DEPSTRUCT; /* used in png_error */ - png_longjmp_ptr longjmp_fn PNG_DEPSTRUCT;/* setjmp non-local goto - function. */ -#endif - png_error_ptr error_fn PNG_DEPSTRUCT; /* function for printing - errors and aborting */ - png_error_ptr warning_fn PNG_DEPSTRUCT; /* function for printing - warnings */ - png_voidp error_ptr PNG_DEPSTRUCT; /* user supplied struct for - error functions */ - png_rw_ptr write_data_fn PNG_DEPSTRUCT; /* function for writing - output data */ - png_rw_ptr read_data_fn PNG_DEPSTRUCT; /* function for reading - input data */ - png_voidp io_ptr PNG_DEPSTRUCT; /* ptr to application struct - for I/O functions */ - -#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED - png_user_transform_ptr read_user_transform_fn PNG_DEPSTRUCT; /* user read - transform */ -#endif - -#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED - png_user_transform_ptr write_user_transform_fn PNG_DEPSTRUCT; /* user write - transform */ -#endif - -/* These were added in libpng-1.0.2 */ -#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - png_voidp user_transform_ptr PNG_DEPSTRUCT; /* user supplied struct - for user transform */ - png_byte user_transform_depth PNG_DEPSTRUCT; /* bit depth of user - transformed pixels */ - png_byte user_transform_channels PNG_DEPSTRUCT; /* channels in user - transformed pixels */ -#endif -#endif - - png_uint_32 mode PNG_DEPSTRUCT; /* tells us where we are in - the PNG file */ - png_uint_32 flags PNG_DEPSTRUCT; /* flags indicating various - things to libpng */ - png_uint_32 transformations PNG_DEPSTRUCT; /* which transformations - to perform */ - - z_stream zstream PNG_DEPSTRUCT; /* pointer to decompression - structure (below) */ - png_bytep zbuf PNG_DEPSTRUCT; /* buffer for zlib */ - png_size_t zbuf_size PNG_DEPSTRUCT; /* size of zbuf */ - int zlib_level PNG_DEPSTRUCT; /* holds zlib compression level */ - int zlib_method PNG_DEPSTRUCT; /* holds zlib compression method */ - int zlib_window_bits PNG_DEPSTRUCT; /* holds zlib compression window - bits */ - int zlib_mem_level PNG_DEPSTRUCT; /* holds zlib compression memory - level */ - int zlib_strategy PNG_DEPSTRUCT; /* holds zlib compression - strategy */ - - png_uint_32 width PNG_DEPSTRUCT; /* width of image in pixels */ - png_uint_32 height PNG_DEPSTRUCT; /* height of image in pixels */ - png_uint_32 num_rows PNG_DEPSTRUCT; /* number of rows in current pass */ - png_uint_32 usr_width PNG_DEPSTRUCT; /* width of row at start of write */ - png_size_t rowbytes PNG_DEPSTRUCT; /* size of row in bytes */ -#if 0 /* Replaced with the following in libpng-1.4.1 */ - png_size_t irowbytes PNG_DEPSTRUCT; -#endif -/* Added in libpng-1.4.1 */ -#ifdef PNG_USER_LIMITS_SUPPORTED - /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk - * can occupy when decompressed. 0 means unlimited. - * We will change the typedef from png_size_t to png_alloc_size_t - * in libpng-1.6.0 - */ - png_alloc_size_t user_chunk_malloc_max PNG_DEPSTRUCT; -#endif - png_uint_32 iwidth PNG_DEPSTRUCT; /* width of current interlaced - row in pixels */ - png_uint_32 row_number PNG_DEPSTRUCT; /* current row in interlace pass */ - png_bytep prev_row PNG_DEPSTRUCT; /* buffer to save previous - (unfiltered) row */ - png_bytep row_buf PNG_DEPSTRUCT; /* buffer to save current - (unfiltered) row */ - png_bytep sub_row PNG_DEPSTRUCT; /* buffer to save "sub" row - when filtering */ - png_bytep up_row PNG_DEPSTRUCT; /* buffer to save "up" row - when filtering */ - png_bytep avg_row PNG_DEPSTRUCT; /* buffer to save "avg" row - when filtering */ - png_bytep paeth_row PNG_DEPSTRUCT; /* buffer to save "Paeth" row - when filtering */ - png_row_info row_info PNG_DEPSTRUCT; /* used for transformation - routines */ - - png_uint_32 idat_size PNG_DEPSTRUCT; /* current IDAT size for read */ - png_uint_32 crc PNG_DEPSTRUCT; /* current chunk CRC value */ - png_colorp palette PNG_DEPSTRUCT; /* palette from the input file */ - png_uint_16 num_palette PNG_DEPSTRUCT; /* number of color entries in - palette */ - png_uint_16 num_trans PNG_DEPSTRUCT; /* number of transparency values */ - png_byte chunk_name[5] PNG_DEPSTRUCT; /* null-terminated name of current - chunk */ - png_byte compression PNG_DEPSTRUCT; /* file compression type - (always 0) */ - png_byte filter PNG_DEPSTRUCT; /* file filter type (always 0) */ - png_byte interlaced PNG_DEPSTRUCT; /* PNG_INTERLACE_NONE, - PNG_INTERLACE_ADAM7 */ - png_byte pass PNG_DEPSTRUCT; /* current interlace pass (0 - 6) */ - png_byte do_filter PNG_DEPSTRUCT; /* row filter flags (see - PNG_FILTER_ below ) */ - png_byte color_type PNG_DEPSTRUCT; /* color type of file */ - png_byte bit_depth PNG_DEPSTRUCT; /* bit depth of file */ - png_byte usr_bit_depth PNG_DEPSTRUCT; /* bit depth of users row */ - png_byte pixel_depth PNG_DEPSTRUCT; /* number of bits per pixel */ - png_byte channels PNG_DEPSTRUCT; /* number of channels in file */ - png_byte usr_channels PNG_DEPSTRUCT; /* channels at start of write */ - png_byte sig_bytes PNG_DEPSTRUCT; /* magic bytes read/written from - start of file */ - -#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) - png_uint_16 filler PNG_DEPSTRUCT; /* filler bytes for pixel - expansion */ -#endif - -#ifdef PNG_bKGD_SUPPORTED - png_byte background_gamma_type PNG_DEPSTRUCT; -# ifdef PNG_FLOATING_POINT_SUPPORTED - float background_gamma PNG_DEPSTRUCT; -# endif - png_color_16 background PNG_DEPSTRUCT; /* background color in - screen gamma space */ -#ifdef PNG_READ_GAMMA_SUPPORTED - png_color_16 background_1 PNG_DEPSTRUCT; /* background normalized - to gamma 1.0 */ -#endif -#endif /* PNG_bKGD_SUPPORTED */ - -#ifdef PNG_WRITE_FLUSH_SUPPORTED - png_flush_ptr output_flush_fn PNG_DEPSTRUCT; /* Function for flushing - output */ - png_uint_32 flush_dist PNG_DEPSTRUCT; /* how many rows apart to flush, - 0 - no flush */ - png_uint_32 flush_rows PNG_DEPSTRUCT; /* number of rows written since - last flush */ -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - int gamma_shift PNG_DEPSTRUCT; /* number of "insignificant" bits - 16-bit gamma */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - float gamma PNG_DEPSTRUCT; /* file gamma value */ - float screen_gamma PNG_DEPSTRUCT; /* screen gamma value - (display_exponent) */ -#endif -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_bytep gamma_table PNG_DEPSTRUCT; /* gamma table for 8-bit - depth files */ - png_bytep gamma_from_1 PNG_DEPSTRUCT; /* converts from 1.0 to screen */ - png_bytep gamma_to_1 PNG_DEPSTRUCT; /* converts from file to 1.0 */ - png_uint_16pp gamma_16_table PNG_DEPSTRUCT; /* gamma table for 16-bit - depth files */ - png_uint_16pp gamma_16_from_1 PNG_DEPSTRUCT; /* converts from 1.0 to - screen */ - png_uint_16pp gamma_16_to_1 PNG_DEPSTRUCT; /* converts from file to 1.0 */ -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED) - png_color_8 sig_bit PNG_DEPSTRUCT; /* significant bits in each - available channel */ -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) - png_color_8 shift PNG_DEPSTRUCT; /* shift for significant bit - tranformation */ -#endif - -#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ - || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_bytep trans_alpha PNG_DEPSTRUCT; /* alpha values for - paletted files */ - png_color_16 trans_color PNG_DEPSTRUCT; /* transparent color for - non-paletted files */ -#endif - - png_read_status_ptr read_row_fn PNG_DEPSTRUCT; /* called after each - row is decoded */ - png_write_status_ptr write_row_fn PNG_DEPSTRUCT; /* called after each - row is encoded */ -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED - png_progressive_info_ptr info_fn PNG_DEPSTRUCT; /* called after header - data fully read */ - png_progressive_row_ptr row_fn PNG_DEPSTRUCT; /* called after each - prog. row is decoded */ - png_progressive_end_ptr end_fn PNG_DEPSTRUCT; /* called after image - is complete */ - png_bytep save_buffer_ptr PNG_DEPSTRUCT; /* current location in - save_buffer */ - png_bytep save_buffer PNG_DEPSTRUCT; /* buffer for previously - read data */ - png_bytep current_buffer_ptr PNG_DEPSTRUCT; /* current location in - current_buffer */ - png_bytep current_buffer PNG_DEPSTRUCT; /* buffer for recently - used data */ - png_uint_32 push_length PNG_DEPSTRUCT; /* size of current input - chunk */ - png_uint_32 skip_length PNG_DEPSTRUCT; /* bytes to skip in - input data */ - png_size_t save_buffer_size PNG_DEPSTRUCT; /* amount of data now - in save_buffer */ - png_size_t save_buffer_max PNG_DEPSTRUCT; /* total size of - save_buffer */ - png_size_t buffer_size PNG_DEPSTRUCT; /* total amount of - available input data */ - png_size_t current_buffer_size PNG_DEPSTRUCT; /* amount of data now - in current_buffer */ - int process_mode PNG_DEPSTRUCT; /* what push library - is currently doing */ - int cur_palette PNG_DEPSTRUCT; /* current push library - palette index */ - -# ifdef PNG_TEXT_SUPPORTED - png_size_t current_text_size PNG_DEPSTRUCT; /* current size of - text input data */ - png_size_t current_text_left PNG_DEPSTRUCT; /* how much text left - to read in input */ - png_charp current_text PNG_DEPSTRUCT; /* current text chunk - buffer */ - png_charp current_text_ptr PNG_DEPSTRUCT; /* current location - in current_text */ -# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */ - -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* For the Borland special 64K segment handler */ - png_bytepp offset_table_ptr PNG_DEPSTRUCT; - png_bytep offset_table PNG_DEPSTRUCT; - png_uint_16 offset_table_number PNG_DEPSTRUCT; - png_uint_16 offset_table_count PNG_DEPSTRUCT; - png_uint_16 offset_table_count_free PNG_DEPSTRUCT; -#endif - -#ifdef PNG_READ_QUANTIZE_SUPPORTED - png_bytep palette_lookup PNG_DEPSTRUCT; /* lookup table for quantizing */ - png_bytep quantize_index PNG_DEPSTRUCT; /* index translation for palette - files */ -#endif - -#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED) - png_uint_16p hist PNG_DEPSTRUCT; /* histogram */ -#endif - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - png_byte heuristic_method PNG_DEPSTRUCT; /* heuristic for row - filter selection */ - png_byte num_prev_filters PNG_DEPSTRUCT; /* number of weights - for previous rows */ - png_bytep prev_filters PNG_DEPSTRUCT; /* filter type(s) of - previous row(s) */ - png_uint_16p filter_weights PNG_DEPSTRUCT; /* weight(s) for previous - line(s) */ - png_uint_16p inv_filter_weights PNG_DEPSTRUCT; /* 1/weight(s) for - previous line(s) */ - png_uint_16p filter_costs PNG_DEPSTRUCT; /* relative filter - calculation cost */ - png_uint_16p inv_filter_costs PNG_DEPSTRUCT; /* 1/relative filter - calculation cost */ -#endif - -#ifdef PNG_TIME_RFC1123_SUPPORTED - png_charp time_buffer PNG_DEPSTRUCT; /* String to hold RFC 1123 time text */ -#endif - -/* New members added in libpng-1.0.6 */ - - png_uint_32 free_me PNG_DEPSTRUCT; /* flags items libpng is - responsible for freeing */ - -#ifdef PNG_USER_CHUNKS_SUPPORTED - png_voidp user_chunk_ptr PNG_DEPSTRUCT; - png_user_chunk_ptr read_user_chunk_fn PNG_DEPSTRUCT; /* user read - chunk handler */ -#endif - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - int num_chunk_list PNG_DEPSTRUCT; - png_bytep chunk_list PNG_DEPSTRUCT; -#endif - -/* New members added in libpng-1.0.3 */ -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - png_byte rgb_to_gray_status PNG_DEPSTRUCT; - /* These were changed from png_byte in libpng-1.0.6 */ - png_uint_16 rgb_to_gray_red_coeff PNG_DEPSTRUCT; - png_uint_16 rgb_to_gray_green_coeff PNG_DEPSTRUCT; - png_uint_16 rgb_to_gray_blue_coeff PNG_DEPSTRUCT; -#endif - -/* New member added in libpng-1.0.4 (renamed in 1.0.9) */ -#if defined(PNG_MNG_FEATURES_SUPPORTED) || \ - defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ - defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) -/* Changed from png_byte to png_uint_32 at version 1.2.0 */ - png_uint_32 mng_features_permitted PNG_DEPSTRUCT; -#endif - -/* New member added in libpng-1.0.7 */ -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_fixed_point int_gamma PNG_DEPSTRUCT; -#endif - -/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */ -#ifdef PNG_MNG_FEATURES_SUPPORTED - png_byte filter_type PNG_DEPSTRUCT; -#endif - -/* New members added in libpng-1.2.0 */ - -/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */ -#ifdef PNG_USER_MEM_SUPPORTED - png_voidp mem_ptr PNG_DEPSTRUCT; /* user supplied struct for - mem functions */ - png_malloc_ptr malloc_fn PNG_DEPSTRUCT; /* function for - allocating memory */ - png_free_ptr free_fn PNG_DEPSTRUCT; /* function for - freeing memory */ -#endif - -/* New member added in libpng-1.0.13 and 1.2.0 */ - png_bytep big_row_buf PNG_DEPSTRUCT; /* buffer to save current - (unfiltered) row */ - -#ifdef PNG_READ_QUANTIZE_SUPPORTED -/* The following three members were added at version 1.0.14 and 1.2.4 */ - png_bytep quantize_sort PNG_DEPSTRUCT; /* working sort array */ - png_bytep index_to_palette PNG_DEPSTRUCT; /* where the original - index currently is - in the palette */ - png_bytep palette_to_index PNG_DEPSTRUCT; /* which original index - points to this - palette color */ -#endif - -/* New members added in libpng-1.0.16 and 1.2.6 */ - png_byte compression_type PNG_DEPSTRUCT; - -#ifdef PNG_USER_LIMITS_SUPPORTED - png_uint_32 user_width_max PNG_DEPSTRUCT; - png_uint_32 user_height_max PNG_DEPSTRUCT; - /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown - * chunks that can be stored (0 means unlimited). - */ - png_uint_32 user_chunk_cache_max PNG_DEPSTRUCT; -#endif - -/* New member added in libpng-1.0.25 and 1.2.17 */ -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - /* Storage for unknown chunk that the library doesn't recognize. */ - png_unknown_chunk unknown_chunk PNG_DEPSTRUCT; -#endif - -/* New members added in libpng-1.2.26 */ - png_uint_32 old_big_row_buf_size PNG_DEPSTRUCT; - png_uint_32 old_prev_row_size PNG_DEPSTRUCT; - -/* New member added in libpng-1.2.30 */ - png_charp chunkdata PNG_DEPSTRUCT; /* buffer for reading chunk data */ - -#ifdef PNG_IO_STATE_SUPPORTED -/* New member added in libpng-1.4.0 */ - png_uint_32 io_state PNG_DEPSTRUCT; -#endif -}; - - -/* This triggers a compiler error in png.c, if png.c and png.h - * do not agree upon the version number. +/* NOTE: prior to 1.5 these functions had no 'API' style declaration, + * this allowed the zlib default functions to be used on Windows + * platforms. In 1.5 the zlib default malloc (which just calls malloc and + * ignores the first argument) should be completely compatible with the + * following. */ -typedef png_structp version_1_4_4; +typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, + png_alloc_size_t)); +typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); typedef png_struct FAR * FAR * png_structpp; -/* Here are the function definitions most commonly used. This is not - * the place to find out how to use libpng. See libpng.txt for the +/* Section 3: exported functions + * Here are the function definitions most commonly used. This is not + * the place to find out how to use libpng. See libpng-manual.txt for the * full explanation, see example.c for the summary. This just provides * a simple one line description of the use of each function. + * + * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in + * pngconf.h and in the *.dfn files in the scripts directory. + * + * PNG_EXPORT(ordinal, type, name, (args)); + * + * ordinal: ordinal that is used while building + * *.def files. The ordinal value is only + * relevant when preprocessing png.h with + * the *.dfn files for building symbol table + * entries, and are removed by pngconf.h. + * type: return type of the function + * name: function name + * args: function arguments, with types + * + * When we wish to append attributes to a function prototype we use + * the PNG_EXPORTA() macro instead. + * + * PNG_EXPORTA(ordinal, type, name, (args), attributes); + * + * ordinal, type, name, and args: same as in PNG_EXPORT(). + * attributes: function attributes */ /* Returns the version number of the library */ -PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void)); +PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); /* Tell lib we have already handled the first magic bytes. * Handling more than 8 bytes from the beginning of the file is an error. */ -PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr, - int num_bytes)); +PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a * PNG file. Returns zero if the supplied bytes match the 8-byte PNG * signature, and non-zero otherwise. Having num_to_check == 0 or * start > 7 will always fail (ie return non-zero). */ -PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start, - png_size_t num_to_check)); +PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start, + png_size_t num_to_check)); /* Simple signature checking function. This is the same as calling * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). */ -#define png_check_sig(sig,n) !png_sig_cmp((sig), 0, (n)) +#define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n)) /* Allocate and initialize png_ptr struct for reading, and any other memory. */ -PNG_EXPORT(png_structp,png_create_read_struct) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED; +PNG_EXPORTA(4, png_structp, png_create_read_struct, + (png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn), + PNG_ALLOCATED); /* Allocate and initialize png_ptr struct for writing, and any other memory */ -PNG_EXPORT(png_structp,png_create_write_struct) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED; +PNG_EXPORTA(5, png_structp, png_create_write_struct, + (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, + png_error_ptr warn_fn), + PNG_ALLOCATED); -PNG_EXPORT(png_size_t,png_get_compression_buffer_size) - PNGARG((png_structp png_ptr)); +PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, + (png_const_structp png_ptr)); -PNG_EXPORT(void,png_set_compression_buffer_size) - PNGARG((png_structp png_ptr, png_size_t size)); +PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, + png_size_t size)); /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp * match up. @@ -1535,288 +1008,547 @@ PNG_EXPORT(void,png_set_compression_buffer_size) * allocated by the library - the call will return NULL on a mismatch * indicating an ABI mismatch. */ -PNG_EXPORT(jmp_buf*, png_set_longjmp_fn) - PNGARG((png_structp png_ptr, png_longjmp_ptr longjmp_fn, size_t - jmp_buf_size)); +PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, + png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); # define png_jmpbuf(png_ptr) \ - (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) + (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) #else # define png_jmpbuf(png_ptr) \ - (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) + (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) #endif +/* This function should be used by libpng applications in place of + * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it + * will use it; otherwise it will call PNG_ABORT(). This function was + * added in libpng-1.5.0. + */ +PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), + PNG_NORETURN); #ifdef PNG_READ_SUPPORTED /* Reset the compression stream */ -PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr)); +PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); #endif /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ #ifdef PNG_USER_MEM_SUPPORTED -PNG_EXPORT(png_structp,png_create_read_struct_2) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)) PNG_ALLOCATED; -PNG_EXPORT(png_structp,png_create_write_struct_2) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)) PNG_ALLOCATED; +PNG_EXPORTA(11, png_structp, png_create_read_struct_2, + (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, + png_error_ptr warn_fn, + png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), + PNG_ALLOCATED); +PNG_EXPORTA(12, png_structp, png_create_write_struct_2, + (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, + png_error_ptr warn_fn, + png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), + PNG_ALLOCATED); #endif /* Write the PNG file signature. */ -PNG_EXPORT(void,png_write_sig) PNGARG((png_structp png_ptr)); +PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); /* Write a PNG chunk - size, type, (optional) data, CRC. */ -PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr, - png_bytep chunk_name, png_bytep data, png_size_t length)); +PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep + chunk_name, png_const_bytep data, png_size_t length)); /* Write the start of a PNG chunk - length and chunk name. */ -PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr, - png_bytep chunk_name, png_uint_32 length)); +PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, + png_const_bytep chunk_name, png_uint_32 length)); /* Write the data of a PNG chunk started with png_write_chunk_start(). */ -PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); +PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, + png_const_bytep data, png_size_t length)); /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ -PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr)); +PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); /* Allocate and initialize the info structure */ -PNG_EXPORT(png_infop,png_create_info_struct) - PNGARG((png_structp png_ptr)) PNG_ALLOCATED; +PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), + PNG_ALLOCATED); -PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr, +PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, png_size_t png_info_struct_size)); /* Writes all the PNG information before the image. */ -PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_EXPORT(20, void, png_write_info_before_PLTE, + (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(21, void, png_write_info, + (png_structp png_ptr, png_infop info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the information before the actual image data. */ -PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_EXPORT(22, void, png_read_info, + (png_structp png_ptr, png_infop info_ptr)); #endif #ifdef PNG_TIME_RFC1123_SUPPORTED -PNG_EXPORT(png_charp,png_convert_to_rfc1123) - PNGARG((png_structp png_ptr, png_timep ptime)); +PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, + (png_structp png_ptr, + png_const_timep ptime)); #endif #ifdef PNG_CONVERT_tIME_SUPPORTED /* Convert from a struct tm to png_time */ -PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime, - struct tm FAR * ttime)); +PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, + PNG_CONST struct tm FAR * ttime)); /* Convert from time_t to png_time. Uses gmtime() */ -PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime, - time_t ttime)); +PNG_EXPORT(25, void, png_convert_from_time_t, + (png_timep ptime, time_t ttime)); #endif /* PNG_CONVERT_tIME_SUPPORTED */ #ifdef PNG_READ_EXPAND_SUPPORTED /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ -PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr)); -PNG_EXPORT(void,png_set_expand_gray_1_2_4_to_8) PNGARG((png_structp - png_ptr)); -PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr)); -PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr)); +PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); +PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); +PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); +PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); +#endif + +#ifdef PNG_READ_EXPAND_16_SUPPORTED +/* Expand to 16-bit channels, forces conversion of palette to RGB and expansion + * of a tRNS chunk if present. + */ +PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr)); #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) /* Use blue, green, red order for pixels. */ -PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr)); +PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* Expand the grayscale to 24-bit RGB if necessary. */ -PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr)); +PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED /* Reduce RGB to grayscale. */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr, - int error_action, double red, double green )); +PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, + int error_action, double red, double green)); +PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, + int error_action, png_fixed_point red, png_fixed_point green)); + +PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp + png_ptr)); +#endif + +#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED +PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, + png_colorp palette)); #endif -PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr, - int error_action, png_fixed_point red, png_fixed_point green )); -PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp - png_ptr)); + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED +/* How the alpha channel is interpreted - this affects how the color channels of + * a PNG file are returned when an alpha channel, or tRNS chunk in a palette + * file, is present. + * + * This has no effect on the way pixels are written into a PNG output + * datastream. The color samples in a PNG datastream are never premultiplied + * with the alpha samples. + * + * The default is to return data according to the PNG specification: the alpha + * channel is a linear measure of the contribution of the pixel to the + * corresponding composited pixel. The gamma encoded color channels must be + * scaled according to the contribution and to do this it is necessary to undo + * the encoding, scale the color values, perform the composition and reencode + * the values. This is the 'PNG' mode. + * + * The alternative is to 'associate' the alpha with the color information by + * storing color channel values that have been scaled by the alpha. The + * advantage is that the color channels can be resampled (the image can be + * scaled) in this form. The disadvantage is that normal practice is to store + * linear, not (gamma) encoded, values and this requires 16-bit channels for + * still images rather than the 8-bit channels that are just about sufficient if + * gamma encoding is used. In addition all non-transparent pixel values, + * including completely opaque ones, must be gamma encoded to produce the final + * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the + * latter being the two common names for associated alpha color channels.) + * + * Since it is not necessary to perform arithmetic on opaque color values so + * long as they are not to be resampled and are in the final color space it is + * possible to optimize the handling of alpha by storing the opaque pixels in + * the PNG format (adjusted for the output color space) while storing partially + * opaque pixels in the standard, linear, format. The accuracy required for + * standard alpha composition is relatively low, because the pixels are + * isolated, therefore typically the accuracy loss in storing 8-bit linear + * values is acceptable. (This is not true if the alpha channel is used to + * simulate transparency over large areas - use 16 bits or the PNG mode in + * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is + * treated as opaque only if the alpha value is equal to the maximum value. + * + * The final choice is to gamma encode the alpha channel as well. This is + * broken because, in practice, no implementation that uses this choice + * correctly undoes the encoding before handling alpha composition. Use this + * choice only if other serious errors in the software or hardware you use + * mandate it; the typical serious error is for dark halos to appear around + * opaque areas of the composited PNG image because of arithmetic overflow. + * + * The API function png_set_alpha_mode specifies which of these choices to use + * with an enumerated 'mode' value and the gamma of the required output: + */ +#define PNG_ALPHA_PNG 0 /* according to the PNG standard */ +#define PNG_ALPHA_STANDARD 1 /* according to Porter/Duff */ +#define PNG_ALPHA_ASSOCIATED 1 /* as above; this is the normal practice */ +#define PNG_ALPHA_PREMULTIPLIED 1 /* as above */ +#define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ +#define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ + +PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, + double output_gamma)); +PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, + int mode, png_fixed_point output_gamma)); +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) +/* The output_gamma value is a screen gamma in libpng terminology: it expresses + * how to decode the output values, not how they are encoded. The values used + * correspond to the normal numbers used to describe the overall gamma of a + * computer display system; for example 2.2 for an sRGB conformant system. The + * values are scaled by 100000 in the _fixed version of the API (so 220000 for + * sRGB.) + * + * The inverse of the value is always used to provide a default for the PNG file + * encoding if it has no gAMA chunk and if png_set_gamma() has not been called + * to override the PNG gamma information. + * + * When the ALPHA_OPTIMIZED mode is selected the output gamma is used to encode + * opaque pixels however pixels with lower alpha values are not encoded, + * regardless of the output gamma setting. + * + * When the standard Porter Duff handling is requested with mode 1 the output + * encoding is set to be linear and the output_gamma value is only relevant + * as a default for input data that has no gamma information. The linear output + * encoding will be overridden if png_set_gamma() is called - the results may be + * highly unexpected! + * + * The following numbers are derived from the sRGB standard and the research + * behind it. sRGB is defined to be approximated by a PNG gAMA chunk value of + * 0.45455 (1/2.2) for PNG. The value implicitly includes any viewing + * correction required to take account of any differences in the color + * environment of the original scene and the intended display environment; the + * value expresses how to *decode* the image for display, not how the original + * data was *encoded*. + * + * sRGB provides a peg for the PNG standard by defining a viewing environment. + * sRGB itself, and earlier TV standards, actually use a more complex transform + * (a linear portion then a gamma 2.4 power law) than PNG can express. (PNG is + * limited to simple power laws.) By saying that an image for direct display on + * an sRGB conformant system should be stored with a gAMA chunk value of 45455 + * (11.3.3.2 and 11.3.3.5 of the ISO PNG specification) the PNG specification + * makes it possible to derive values for other display systems and + * environments. + * + * The Mac value is deduced from the sRGB based on an assumption that the actual + * extra viewing correction used in early Mac display systems was implemented as + * a power 1.45 lookup table. + * + * Any system where a programmable lookup table is used or where the behavior of + * the final display device characteristics can be changed requires system + * specific code to obtain the current characteristic. However this can be + * difficult and most PNG gamma correction only requires an approximate value. + * + * By default, if png_set_alpha_mode() is not called, libpng assumes that all + * values are unencoded, linear, values and that the output device also has a + * linear characteristic. This is only very rarely correct - it is invariably + * better to call png_set_alpha_mode() with PNG_DEFAULT_sRGB than rely on the + * default if you don't know what the right answer is! + * + * The special value PNG_GAMMA_MAC_18 indicates an older Mac system (pre Mac OS + * 10.6) which used a correction table to implement a somewhat lower gamma on an + * otherwise sRGB system. + * + * Both these values are reserved (not simple gamma values) in order to allow + * more precise correction internally in the future. + * + * NOTE: the following values can be passed to either the fixed or floating + * point APIs, but the floating point API will also accept floating point + * values. + */ +#define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */ +#define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */ +#define PNG_GAMMA_sRGB 220000 /* Television standards--matches sRGB gamma */ +#define PNG_GAMMA_LINEAR PNG_FP_1 /* Linear */ #endif -PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth, - png_colorp palette)); +/* The following are examples of calls to png_set_alpha_mode to achieve the + * required overall gamma correction and, where necessary, alpha + * premultiplication. + * + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); + * This is the default libpng handling of the alpha channel - it is not + * pre-multiplied into the color components. In addition the call states + * that the output is for a sRGB system and causes all PNG files without gAMA + * chunks to be assumed to be encoded using sRGB. + * + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); + * In this case the output is assumed to be something like an sRGB conformant + * display preceeded by a power-law lookup table of power 1.45. This is how + * early Mac systems behaved. + * + * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_GAMMA_LINEAR); + * This is the classic Jim Blinn approach and will work in academic + * environments where everything is done by the book. It has the shortcoming + * of assuming that input PNG data with no gamma information is linear - this + * is unlikely to be correct unless the PNG files where generated locally. + * Most of the time the output precision will be so low as to show + * significant banding in dark areas of the image. + * + * png_set_expand_16(pp); + * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_DEFAULT_sRGB); + * This is a somewhat more realistic Jim Blinn inspired approach. PNG files + * are assumed to have the sRGB encoding if not marked with a gamma value and + * the output is always 16 bits per component. This permits accurate scaling + * and processing of the data. If you know that your input PNG files were + * generated locally you might need to replace PNG_DEFAULT_sRGB with the + * correct value for your system. + * + * png_set_alpha_mode(pp, PNG_ALPHA_OPTIMIZED, PNG_DEFAULT_sRGB); + * If you just need to composite the PNG image onto an existing background + * and if you control the code that does this you can use the optimization + * setting. In this case you just copy completely opaque pixels to the + * output. For pixels that are not completely transparent (you just skip + * those) you do the composition math using png_composite or png_composite_16 + * below then encode the resultant 8-bit or 16-bit values to match the output + * encoding. + * + * Other cases + * If neither the PNG nor the standard linear encoding work for you because + * of the software or hardware you use then you have a big problem. The PNG + * case will probably result in halos around the image. The linear encoding + * will probably result in a washed out, too bright, image (it's actually too + * contrasty.) Try the ALPHA_OPTIMIZED mode above - this will probably + * substantially reduce the halos. Alternatively try: + * + * png_set_alpha_mode(pp, PNG_ALPHA_BROKEN, PNG_DEFAULT_sRGB); + * This option will also reduce the halos, but there will be slight dark + * halos round the opaque parts of the image where the background is light. + * In the OPTIMIZED mode the halos will be light halos where the background + * is dark. Take your pick - the halos are unavoidable unless you can get + * your hardware/software fixed! (The OPTIMIZED approach is slightly + * faster.) + * + * When the default gamma of PNG files doesn't match the output gamma. + * If you have PNG files with no gamma information png_set_alpha_mode allows + * you to provide a default gamma, but it also sets the ouput gamma to the + * matching value. If you know your PNG files have a gamma that doesn't + * match the output you can take advantage of the fact that + * png_set_alpha_mode always sets the output gamma but only sets the PNG + * default if it is not already set: + * + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); + * The first call sets both the default and the output gamma values, the + * second call overrides the output gamma without changing the default. This + * is easier than achieving the same effect with png_set_gamma. You must use + * PNG_ALPHA_PNG for the first call - internal checking in png_set_alpha will + * fire if more than one call to png_set_alpha_mode and png_set_background is + * made in the same read operation, however multiple calls with PNG_ALPHA_PNG + * are ignored. + */ #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED -PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr)); +PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); #endif #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr)); +PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); #endif #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr)); +PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); #endif #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr, - png_uint_32 filler, int flags)); +PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, + int flags)); /* The values of the PNG_FILLER_ defines should NOT be changed */ -#define PNG_FILLER_BEFORE 0 -#define PNG_FILLER_AFTER 1 +# define PNG_FILLER_BEFORE 0 +# define PNG_FILLER_AFTER 1 /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(void,png_set_add_alpha) PNGARG((png_structp png_ptr, - png_uint_32 filler, int flags)); +PNG_EXPORT(40, void, png_set_add_alpha, + (png_structp png_ptr, png_uint_32 filler, + int flags)); #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) /* Swap bytes in 16-bit depth files. */ -PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr)); +PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); #endif #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ -PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr)); +PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); #endif #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ defined(PNG_WRITE_PACKSWAP_SUPPORTED) /* Swap packing order of pixels in bytes. */ -PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr)); +PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); #endif #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) /* Converts files to legal bit depths. */ -PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr, - png_color_8p true_bits)); +PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p + true_bits)); #endif #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ defined(PNG_WRITE_INTERLACING_SUPPORTED) -/* Have the code handle the interlacing. Returns the number of passes. */ -PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr)); +/* Have the code handle the interlacing. Returns the number of passes. + * MUST be called before png_read_update_info or png_start_read_image, + * otherwise it will not have the desired effect. Note that it is still + * necessary to call png_read_row or png_read_rows png_get_image_height + * times for each pass. +*/ +PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) /* Invert monochrome files */ -PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr)); +PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); #endif #ifdef PNG_READ_BACKGROUND_SUPPORTED -/* Handle alpha and tRNS by replacing with a background color. */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr, - png_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma)); +/* Handle alpha and tRNS by replacing with a background color. Prior to + * libpng-1.5.4 this API must not be called before the PNG file header has been + * read. Doing so will result in unexpected behavior and possible warnings or + * errors if the PNG file contains a bKGD chunk. + */ +PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, + png_const_color_16p background_color, int background_gamma_code, + int need_expand, double background_gamma)); +PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, + png_const_color_16p background_color, int background_gamma_code, + int need_expand, png_fixed_point background_gamma)); +#endif +#ifdef PNG_READ_BACKGROUND_SUPPORTED +# define PNG_BACKGROUND_GAMMA_UNKNOWN 0 +# define PNG_BACKGROUND_GAMMA_SCREEN 1 +# define PNG_BACKGROUND_GAMMA_FILE 2 +# define PNG_BACKGROUND_GAMMA_UNIQUE 3 #endif -#define PNG_BACKGROUND_GAMMA_UNKNOWN 0 -#define PNG_BACKGROUND_GAMMA_SCREEN 1 -#define PNG_BACKGROUND_GAMMA_FILE 2 -#define PNG_BACKGROUND_GAMMA_UNIQUE 3 + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED +/* Scale a 16-bit depth file down to 8-bit, accurately. */ +PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr)); #endif -#ifdef PNG_READ_16_TO_8_SUPPORTED +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED +#define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ /* Strip the second byte of information from a 16-bit depth file. */ -PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr)); +PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED /* Turn on quantizing, and reduce the palette to the number of colors - * available. Prior to libpng-1.4.2, this was png_set_dither(). + * available. */ -PNG_EXPORT(void,png_set_quantize) PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette, int maximum_colors, - png_uint_16p histogram, int full_quantize)); +PNG_EXPORT(49, void, png_set_quantize, + (png_structp png_ptr, png_colorp palette, + int num_palette, int maximum_colors, png_const_uint_16p histogram, + int full_quantize)); #endif -/* This migration aid will be removed from libpng-1.5.0 */ -#define png_set_dither png_set_quantize #ifdef PNG_READ_GAMMA_SUPPORTED -/* Handle gamma correction. Screen_gamma=(display_exponent) */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr, - double screen_gamma, double default_file_gamma)); -#endif -#endif +/* The threshold on gamma processing is configurable but hard-wired into the + * library. The following is the floating point variant. + */ +#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) +/* Handle gamma correction. Screen_gamma=(display_exponent). + * NOTE: this API simply sets the screen and file gamma values. It will + * therefore override the value for gamma in a PNG file if it is called after + * the file header has been read - use with care - call before reading the PNG + * file for best results! + * + * These routines accept the same gamma values as png_set_alpha_mode (described + * above). The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either + * API (floating point or fixed.) Notice, however, that the 'file_gamma' value + * is the inverse of a 'screen gamma' value. + */ +PNG_FP_EXPORT(50, void, png_set_gamma, + (png_structp png_ptr, double screen_gamma, + double override_file_gamma)); +PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, + png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); +#endif #ifdef PNG_WRITE_FLUSH_SUPPORTED /* Set how many lines between output flushes - 0 for no flushing */ -PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows)); +PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); /* Flush the current PNG output buffer */ -PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr)); +PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); #endif /* Optional update palette with requested transformations */ -PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr)); +PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); /* Optional call to update the users info structure */ -PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_EXPORT(54, void, png_read_update_info, + (png_structp png_ptr, png_infop info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read one or more rows of image data. */ -PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr, - png_bytepp row, png_bytepp display_row, png_uint_32 num_rows)); +PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, + png_bytepp display_row, png_uint_32 num_rows)); #endif #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read a row of data. */ -PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr, - png_bytep row, - png_bytep display_row)); +PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, + png_bytep display_row)); #endif #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the whole image into memory at once. */ -PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr, - png_bytepp image)); +PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); #endif /* Write a row of image data */ -PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr, - png_bytep row)); +PNG_EXPORT(58, void, png_write_row, + (png_structp png_ptr, png_const_bytep row)); -/* Write a few rows of image data */ -PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr, - png_bytepp row, png_uint_32 num_rows)); +/* Write a few rows of image data: (*row) is not written; however, the type + * is declared as writeable to maintain compatibility with previous versions + * of libpng and to allow the 'display_row' array from read_rows to be passed + * unchanged to write_rows. + */ +PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, + png_uint_32 num_rows)); /* Write the image data */ -PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, - png_bytepp image)); +PNG_EXPORT(60, void, png_write_image, + (png_structp png_ptr, png_bytepp image)); /* Write the end of the PNG file. */ -PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_EXPORT(61, void, png_write_end, + (png_structp png_ptr, png_infop info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the end of the PNG file. */ -PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); #endif /* Free any memory associated with the png_info_struct */ -PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr, - png_infopp info_ptr_ptr)); +PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, + png_infopp info_ptr_ptr)); /* Free any memory associated with the png_struct and the png_info_structs */ -PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp - png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); +PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, + png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); /* Free any memory associated with the png_struct and the png_info_structs */ -PNG_EXPORT(void,png_destroy_write_struct) - PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)); +PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, + png_infopp info_ptr_ptr)); /* Set the libpng method of handling chunk CRC errors */ -PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr, - int crit_action, int ancil_action)); +PNG_EXPORT(66, void, png_set_crc_action, + (png_structp png_ptr, int crit_action, int ancil_action)); -/* Values for png_set_crc_action() to say how to handle CRC errors in +/* Values for png_set_crc_action() say how to handle CRC errors in * ancillary and critical chunks, and whether to use the data contained * therein. Note that it is impossible to "discard" data in a critical * chunk. For versions prior to 0.90, the action was always error/quit, @@ -1843,8 +1575,8 @@ PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr, /* Set the filtering method(s) used by libpng. Currently, the only valid * value for "method" is 0. */ -PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, - int filters)); +PNG_EXPORT(67, void, png_set_filter, + (png_structp png_ptr, int method, int filters)); /* Flags for png_set_filter() to say which filters to use. The flags * are chosen so that they don't conflict with real filter types @@ -1899,11 +1631,13 @@ PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, * the weights and costs are set to 1.0, this degenerates the WEIGHTED method * to the UNWEIGHTED method, but with added encoding time/computation. */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, - int heuristic_method, int num_weights, png_doublep filter_weights, - png_doublep filter_costs)); -#endif +PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, + int heuristic_method, int num_weights, png_const_doublep filter_weights, + png_const_doublep filter_costs)); +PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, + (png_structp png_ptr, + int heuristic_method, int num_weights, png_const_fixed_point_p + filter_weights, png_const_fixed_point_p filter_costs)); #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ /* Heuristic used for row filter selection. These defines should NOT be @@ -1914,6 +1648,7 @@ PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ +#ifdef PNG_WRITE_SUPPORTED /* Set the library compression level. Currently, valid values range from * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 * (0 - no compression, 9 - "maximal" compression). Note that tests have @@ -1921,34 +1656,58 @@ PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, * for PNG images, and do considerably fewer caclulations. In the future, * these values may not correspond directly to the zlib compression levels. */ -PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr, - int level)); +PNG_EXPORT(69, void, png_set_compression_level, + (png_structp png_ptr, int level)); -PNG_EXPORT(void,png_set_compression_mem_level) - PNGARG((png_structp png_ptr, int mem_level)); +PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, + int mem_level)); -PNG_EXPORT(void,png_set_compression_strategy) - PNGARG((png_structp png_ptr, int strategy)); +PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, + int strategy)); -PNG_EXPORT(void,png_set_compression_window_bits) - PNGARG((png_structp png_ptr, int window_bits)); +/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a + * smaller value of window_bits if it can do so safely. + */ +PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, + int window_bits)); + +PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, + int method)); +#endif + +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED +/* Also set zlib parameters for compressing non-IDAT chunks */ +PNG_EXPORT(222, void, png_set_text_compression_level, + (png_structp png_ptr, int level)); + +PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structp png_ptr, + int mem_level)); + +PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structp png_ptr, + int strategy)); + +/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a + * smaller value of window_bits if it can do so safely. + */ +PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp + png_ptr, int window_bits)); -PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr, - int method)); +PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, + int method)); +#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ /* These next functions are called for input/output, memory, and error * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, * and call standard C I/O routines such as fread(), fwrite(), and * fprintf(). These functions can be made to use other I/O routines * at run time for those applications that need to handle I/O in a - * different manner by calling png_set_???_fn(). See libpng.txt for + * different manner by calling png_set_???_fn(). See libpng-manual.txt for * more information. */ #ifdef PNG_STDIO_SUPPORTED /* Initialize the input/output for the PNG file to the default functions. */ -PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, - png_FILE_p fp)); +PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); #endif /* Replace the (error and abort), and warning functions with user @@ -1959,11 +1718,12 @@ PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, * default function will be used. */ -PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr, - png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); +PNG_EXPORT(75, void, png_set_error_fn, + (png_structp png_ptr, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warning_fn)); /* Return the user pointer associated with the error functions */ -PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr)); +PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); /* Replace the default data output functions with a user supplied one(s). * If buffered output is not used, then output_flush_fn can be set to NULL. @@ -1975,101 +1735,139 @@ PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr)); * default flush function, which uses the standard *FILE structure, will * be used. */ -PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr, - png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); +PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, + png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); /* Replace the default data input function with a user supplied one. */ -PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr, - png_voidp io_ptr, png_rw_ptr read_data_fn)); +PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, + png_rw_ptr read_data_fn)); /* Return the user pointer associated with the I/O functions */ -PNG_EXPORT(png_voidp,png_get_io_ptr) PNGARG((png_structp png_ptr)); +PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); -PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr, - png_read_status_ptr read_row_fn)); +PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, + png_read_status_ptr read_row_fn)); -PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr, - png_write_status_ptr write_row_fn)); +PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, + png_write_status_ptr write_row_fn)); #ifdef PNG_USER_MEM_SUPPORTED /* Replace the default memory allocation functions with user supplied one(s). */ -PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr, - png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)); +PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn)); /* Return the user pointer associated with the memory functions */ -PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr)); +PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); #endif #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp - png_ptr, png_user_transform_ptr read_user_transform_fn)); +PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, + png_user_transform_ptr read_user_transform_fn)); #endif #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp - png_ptr, png_user_transform_ptr write_user_transform_fn)); +PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, + png_user_transform_ptr write_user_transform_fn)); #endif -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) -PNG_EXPORT(void,png_set_user_transform_info) PNGARG((png_structp - png_ptr, png_voidp user_transform_ptr, int user_transform_depth, - int user_transform_channels)); +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED +PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, + png_voidp user_transform_ptr, int user_transform_depth, + int user_transform_channels)); /* Return the user pointer associated with the user transform functions */ -PNG_EXPORT(png_voidp,png_get_user_transform_ptr) - PNGARG((png_structp png_ptr)); +PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, + (png_const_structp png_ptr)); +#endif + +#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED +/* Return information about the row currently being processed. Note that these + * APIs do not fail but will return unexpected results if called outside a user + * transform callback. Also note that when transforming an interlaced image the + * row number is the row number within the sub-image of the interlace pass, so + * the value will increase to the height of the sub-image (not the full image) + * then reset to 0 for the next pass. + * + * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to + * find the output pixel (x,y) given an interlaced sub-image pixel + * (row,col,pass). (See below for these macros.) + */ +PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); +PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); #endif #ifdef PNG_USER_CHUNKS_SUPPORTED -PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr, - png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); -PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp - png_ptr)); +PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, + png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); +PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); #endif #ifdef PNG_PROGRESSIVE_READ_SUPPORTED /* Sets the function callbacks for the push reader, and a pointer to a * user-defined structure available to the callback functions. */ -PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr, - png_voidp progressive_ptr, - png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, - png_progressive_end_ptr end_fn)); +PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, + png_voidp progressive_ptr, png_progressive_info_ptr info_fn, + png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); /* Returns the user pointer associated with the push read functions */ -PNG_EXPORT(png_voidp,png_get_progressive_ptr) - PNGARG((png_structp png_ptr)); +PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); /* Function to be called when data becomes available */ -PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep buffer, png_size_t buffer_size)); +PNG_EXPORT(92, void, png_process_data, + (png_structp png_ptr, png_infop info_ptr, + png_bytep buffer, png_size_t buffer_size)); + +/* A function which may be called *only* within png_process_data to stop the + * processing of any more data. The function returns the number of bytes + * remaining, excluding any that libpng has cached internally. A subsequent + * call to png_process_data must supply these bytes again. If the argument + * 'save' is set to true the routine will first save all the pending data and + * will always return 0. + */ +PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); -/* Function that combines rows. Not very much different than the - * png_combine_row() call. Is this even used????? +/* A function which may be called *only* outside (after) a call to + * png_process_data. It returns the number of bytes of data to skip in the + * input. Normally it will return 0, but if it returns a non-zero value the + * application must skip than number of bytes of input data and pass the + * following data to the next call to png_process_data. */ -PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr, - png_bytep old_row, png_bytep new_row)); +PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); + +#ifdef PNG_READ_INTERLACING_SUPPORTED +/* Function that combines rows. 'new_row' is a flag that should come from + * the callback and be non-NULL if anything needs to be done; the library + * stores its own version of the new data internally and ignores the passed + * in value. + */ +PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, + png_bytep old_row, png_const_bytep new_row)); +#endif /* PNG_READ_INTERLACING_SUPPORTED */ #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ -PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr, - png_alloc_size_t size)) PNG_ALLOCATED; +PNG_EXPORTA(94, png_voidp, png_malloc, + (png_structp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED); /* Added at libpng version 1.4.0 */ -PNG_EXPORT(png_voidp,png_calloc) PNGARG((png_structp png_ptr, - png_alloc_size_t size)) PNG_ALLOCATED; +PNG_EXPORTA(95, png_voidp, png_calloc, + (png_structp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED); /* Added at libpng version 1.2.4 */ -PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr, - png_alloc_size_t size)) PNG_ALLOCATED; +PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); /* Frees a pointer allocated by png_malloc() */ -PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr)); +PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); /* Free data that was allocated internally */ -PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 free_me, int num)); +PNG_EXPORT(98, void, png_free_data, + (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); + /* Reassign responsibility for freeing existing data, whether allocated * by libpng or by the application */ -PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr, - png_infop info_ptr, int freer, png_uint_32 mask)); +PNG_EXPORT(99, void, png_data_freer, + (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); + /* Assignments for png_data_freer */ #define PNG_DESTROY_WILL_FREE_DATA 1 #define PNG_SET_WILL_FREE_DATA 1 @@ -2090,46 +1888,58 @@ PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr, #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ #ifdef PNG_USER_MEM_SUPPORTED -PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr, - png_alloc_size_t size)) PNG_ALLOCATED; -PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr, - png_voidp ptr)); +PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); +PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); #endif -#ifndef PNG_NO_ERROR_TEXT +#ifdef PNG_ERROR_TEXT_SUPPORTED /* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr, - png_const_charp error_message)) PNG_NORETURN; +PNG_EXPORTA(102, void, png_error, + (png_structp png_ptr, png_const_charp error_message), + PNG_NORETURN); /* The same, but the chunk name is prepended to the error string. */ -PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr, - png_const_charp error_message)) PNG_NORETURN; +PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, + png_const_charp error_message), PNG_NORETURN); #else /* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORT(void,png_err) PNGARG((png_structp png_ptr)) PNG_NORETURN; +PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); #endif +#ifdef PNG_WARNINGS_SUPPORTED /* Non-fatal error in libpng. Can continue, but may have a problem. */ -PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr, - png_const_charp warning_message)); +PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, + png_const_charp warning_message)); /* Non-fatal error in libpng, chunk name is prepended to message. */ -PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr, - png_const_charp warning_message)); +PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, + png_const_charp warning_message)); +#endif #ifdef PNG_BENIGN_ERRORS_SUPPORTED /* Benign error in libpng. Can continue, but may have a problem. * User can choose whether to handle as a fatal error or as a warning. */ -PNG_EXPORT(void,png_benign_error) PNGARG((png_structp png_ptr, - png_const_charp warning_message)); +# undef png_benign_error +PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, + png_const_charp warning_message)); /* Same, chunk name is prepended to message. */ -PNG_EXPORT(void,png_chunk_benign_error) PNGARG((png_structp png_ptr, - png_const_charp warning_message)); +# undef png_chunk_benign_error +PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, + png_const_charp warning_message)); -PNG_EXPORT(void,png_set_benign_errors) PNGARG((png_structp - png_ptr, int allowed)); +PNG_EXPORT(109, void, png_set_benign_errors, + (png_structp png_ptr, int allowed)); +#else +# ifdef PNG_ALLOW_BENIGN_ERRORS +# define png_benign_error png_warning +# define png_chunk_benign_error png_chunk_warning +# else +# define png_benign_error png_error +# define png_chunk_benign_error png_chunk_error +# endif #endif /* The png_set_ functions are for storing values in the png_info_struct. @@ -2145,258 +1955,289 @@ PNG_EXPORT(void,png_set_benign_errors) PNGARG((png_structp * png_info_struct. */ /* Returns "flag" if chunk data is valid in info_ptr. */ -PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_structp png_ptr, -png_infop info_ptr, png_uint_32 flag)); +PNG_EXPORT(110, png_uint_32, png_get_valid, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 flag)); /* Returns number of bytes needed to hold a transformed row. */ -PNG_EXPORT(png_size_t,png_get_rowbytes) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, + png_const_infop info_ptr)); #ifdef PNG_INFO_IMAGE_SUPPORTED /* Returns row_pointers, which is an array of pointers to scanlines that was * returned from png_read_png(). */ -PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +PNG_EXPORT(112, png_bytepp, png_get_rows, + (png_const_structp png_ptr, png_const_infop info_ptr)); /* Set row_pointers, which is an array of pointers to scanlines for use * by png_write_png(). */ -PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytepp row_pointers)); +PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, + png_infop info_ptr, png_bytepp row_pointers)); #endif /* Returns number of color channels in image. */ -PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +PNG_EXPORT(114, png_byte, png_get_channels, + (png_const_structp png_ptr, png_const_infop info_ptr)); #ifdef PNG_EASY_ACCESS_SUPPORTED /* Returns image width in pixels. */ -PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, + png_const_infop info_ptr)); /* Returns image height in pixels. */ -PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, + png_const_infop info_ptr)); /* Returns image bit_depth. */ -PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(117, png_byte, png_get_bit_depth, + (png_const_structp png_ptr, png_const_infop info_ptr)); /* Returns image color_type. */ -PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, + png_const_infop info_ptr)); /* Returns image filter_type. */ -PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, + png_const_infop info_ptr)); /* Returns image interlace_type. */ -PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, + png_const_infop info_ptr)); /* Returns image compression_type. */ -PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, + png_const_infop info_ptr)); /* Returns image resolution in pixels per meter, from pHYs chunk data. */ -PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, + (png_const_structp png_ptr, png_const_infop info_ptr)); /* Returns pixel aspect ratio, computed from pHYs chunk data. */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -#endif +PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, + (png_const_structp png_ptr, png_const_infop info_ptr)); /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ -PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_structp -png_ptr, png_infop info_ptr)); +PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, + (png_const_structp png_ptr, png_const_infop info_ptr)); #endif /* PNG_EASY_ACCESS_SUPPORTED */ /* Returns pointer to signature string read from PNG header */ -PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +PNG_EXPORT(130, png_const_bytep, png_get_signature, + (png_const_structp png_ptr, png_infop info_ptr)); #ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_16p *background)); +PNG_EXPORT(131, png_uint_32, png_get_bKGD, + (png_const_structp png_ptr, png_infop info_ptr, + png_color_16p *background)); #endif #ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_16p background)); +PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, + png_const_color_16p background)); #endif #ifdef PNG_cHRM_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, double *white_x, double *white_y, double *red_x, - double *red_y, double *green_x, double *green_y, double *blue_x, - double *blue_y)); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point *int_white_x, png_fixed_point - *int_white_y, png_fixed_point *int_red_x, png_fixed_point *int_red_y, - png_fixed_point *int_green_x, png_fixed_point *int_green_y, png_fixed_point - *int_blue_x, png_fixed_point *int_blue_y)); -#endif +PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, + png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, + double *red_y, double *green_x, double *green_y, double *blue_x, + double *blue_y)); +PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, + png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, + double *green_X, double *green_Y, double *green_Z, double *blue_X, + double *blue_Y, double *blue_Z)); +#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ +PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, + (png_const_structp png_ptr, + png_const_infop info_ptr, png_fixed_point *int_white_x, + png_fixed_point *int_white_y, png_fixed_point *int_red_x, + png_fixed_point *int_red_y, png_fixed_point *int_green_x, + png_fixed_point *int_green_y, png_fixed_point *int_blue_x, + png_fixed_point *int_blue_y)); +#endif +PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, + (png_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *int_red_X, png_fixed_point *int_red_Y, + png_fixed_point *int_red_Z, png_fixed_point *int_green_X, + png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, + png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, + png_fixed_point *int_blue_Z)); #endif #ifdef PNG_cHRM_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, double white_x, double white_y, double red_x, - double red_y, double green_x, double green_y, double blue_x, double blue_y)); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -#endif +PNG_FP_EXPORT(135, void, png_set_cHRM, + (png_structp png_ptr, png_infop info_ptr, + double white_x, double white_y, double red_x, double red_y, double green_x, + double green_y, double blue_x, double blue_y)); +PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, + png_infop info_ptr, double red_X, double red_Y, double red_Z, + double green_X, double green_Y, double green_Z, double blue_X, + double blue_Y, double blue_Z)); +PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, + png_infop info_ptr, png_fixed_point int_white_x, + png_fixed_point int_white_y, png_fixed_point int_red_x, + png_fixed_point int_red_y, png_fixed_point int_green_x, + png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)); +PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, + png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, + png_fixed_point int_red_Z, png_fixed_point int_green_X, + png_fixed_point int_green_Y, png_fixed_point int_green_Z, + png_fixed_point int_blue_X, png_fixed_point int_blue_Y, + png_fixed_point int_blue_Z)); #endif #ifdef PNG_gAMA_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr, - png_infop info_ptr, double *file_gamma)); -#endif -PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point *int_file_gamma)); +PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, + (png_const_structp png_ptr, png_const_infop info_ptr, + double *file_gamma)); +PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *int_file_gamma)); #endif #ifdef PNG_gAMA_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr, - png_infop info_ptr, double file_gamma)); -#endif -PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_file_gamma)); +PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, + png_infop info_ptr, double file_gamma)); +PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, + png_infop info_ptr, png_fixed_point int_file_gamma)); #endif #ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_16p *hist)); +PNG_EXPORT(141, png_uint_32, png_get_hIST, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_16p *hist)); #endif #ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_16p hist)); +PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, + png_infop info_ptr, png_const_uint_16p hist)); #endif -PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 *width, png_uint_32 *height, - int *bit_depth, int *color_type, int *interlace_method, - int *compression_method, int *filter_method)); +PNG_EXPORT(143, png_uint_32, png_get_IHDR, + (png_structp png_ptr, png_infop info_ptr, + png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, + int *interlace_method, int *compression_method, int *filter_method)); -PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_method, int compression_method, - int filter_method)); +PNG_EXPORT(144, void, png_set_IHDR, + (png_structp png_ptr, png_infop info_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, + int interlace_method, int compression_method, int filter_method)); #ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, - int *unit_type)); +PNG_EXPORT(145, png_uint_32, png_get_oFFs, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); #endif #ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y, - int unit_type)); +PNG_EXPORT(146, void, png_set_oFFs, + (png_structp png_ptr, png_infop info_ptr, + png_int_32 offset_x, png_int_32 offset_y, int unit_type)); #endif #ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1, - int *type, int *nparams, png_charp *units, png_charpp *params)); +PNG_EXPORT(147, png_uint_32, png_get_pCAL, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, + int *nparams, + png_charp *units, png_charpp *params)); #endif #ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, - int type, int nparams, png_charp units, png_charpp params)); +PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, + png_infop info_ptr, + png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, + int nparams, png_const_charp units, png_charpp params)); #endif #ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); +PNG_EXPORT(149, png_uint_32, png_get_pHYs, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); #endif #ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); +PNG_EXPORT(150, void, png_set_pHYs, + (png_structp png_ptr, png_infop info_ptr, + png_uint_32 res_x, png_uint_32 res_y, int unit_type)); #endif -PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_colorp *palette, int *num_palette)); +PNG_EXPORT(151, png_uint_32, png_get_PLTE, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_colorp *palette, int *num_palette)); -PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_colorp palette, int num_palette)); +PNG_EXPORT(152, void, png_set_PLTE, + (png_structp png_ptr, png_infop info_ptr, + png_const_colorp palette, int num_palette)); #ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_8p *sig_bit)); +PNG_EXPORT(153, png_uint_32, png_get_sBIT, + (png_const_structp png_ptr, png_infop info_ptr, + png_color_8p *sig_bit)); #endif #ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_8p sig_bit)); +PNG_EXPORT(154, void, png_set_sBIT, + (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); #endif #ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr, - png_infop info_ptr, int *intent)); +PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, + png_const_infop info_ptr, int *file_srgb_intent)); #endif #ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr, - png_infop info_ptr, int intent)); -PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, int intent)); +PNG_EXPORT(156, void, png_set_sRGB, + (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); +PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, + png_infop info_ptr, int srgb_intent)); #endif #ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charpp name, int *compression_type, - png_charpp profile, png_uint_32 *proflen)); - /* Note to maintainer: profile should be png_bytepp */ +PNG_EXPORT(158, png_uint_32, png_get_iCCP, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_charpp name, int *compression_type, png_bytepp profile, + png_uint_32 *proflen)); #endif #ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charp name, int compression_type, - png_charp profile, png_uint_32 proflen)); - /* Note to maintainer: profile should be png_bytep */ +PNG_EXPORT(159, void, png_set_iCCP, + (png_structp png_ptr, png_infop info_ptr, + png_const_charp name, int compression_type, png_const_bytep profile, + png_uint_32 proflen)); #endif #ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_sPLT_tpp entries)); +PNG_EXPORT(160, png_uint_32, png_get_sPLT, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_sPLT_tpp entries)); #endif #ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_sPLT_tp entries, int nentries)); +PNG_EXPORT(161, void, png_set_sPLT, + (png_structp png_ptr, png_infop info_ptr, + png_const_sPLT_tp entries, int nentries)); #endif #ifdef PNG_TEXT_SUPPORTED /* png_get_text also returns the number of text chunks in *num_text */ -PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_textp *text_ptr, int *num_text)); +PNG_EXPORT(162, png_uint_32, png_get_text, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_textp *text_ptr, int *num_text)); #endif /* Note while png_set_text() will accept a structure whose text, @@ -2407,111 +2248,123 @@ PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr, */ #ifdef PNG_TEXT_SUPPORTED -PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_textp text_ptr, int num_text)); +PNG_EXPORT(163, void, png_set_text, + (png_structp png_ptr, png_infop info_ptr, + png_const_textp text_ptr, int num_text)); #endif #ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_timep *mod_time)); +PNG_EXPORT(164, png_uint_32, png_get_tIME, + (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); #endif #ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_timep mod_time)); -#endif - -#ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep *trans_alpha, int *num_trans, - png_color_16p *trans_color)); +PNG_EXPORT(165, void, png_set_tIME, + (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); #endif #ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep trans_alpha, int num_trans, - png_color_16p trans_color)); +PNG_EXPORT(166, png_uint_32, png_get_tRNS, + (png_const_structp png_ptr, png_infop info_ptr, + png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); #endif #ifdef PNG_tRNS_SUPPORTED +PNG_EXPORT(167, void, png_set_tRNS, + (png_structp png_ptr, png_infop info_ptr, + png_const_bytep trans_alpha, int num_trans, + png_const_color_16p trans_color)); #endif #ifdef PNG_sCAL_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, int *unit, double *width, double *height)); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr, - png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight)); -#endif -#endif +PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, + (png_const_structp png_ptr, png_const_infop info_ptr, + int *unit, double *width, double *height)); +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +/* NOTE: this API is currently implemented using floating point arithmetic, + * consequently it can only be used on systems with floating point support. + * In any case the range of values supported by png_fixed_point is small and it + * is highly recommended that png_get_sCAL_s be used instead. + */ +PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, + (png_structp png_ptr, png_const_infop info_ptr, int *unit, + png_fixed_point *width, + png_fixed_point *height)); +#endif +PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, + (png_const_structp png_ptr, png_const_infop info_ptr, + int *unit, png_charpp swidth, png_charpp sheight)); + +PNG_FP_EXPORT(170, void, png_set_sCAL, + (png_structp png_ptr, png_infop info_ptr, + int unit, double width, double height)); +PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, + png_infop info_ptr, int unit, png_fixed_point width, + png_fixed_point height)); +PNG_EXPORT(171, void, png_set_sCAL_s, + (png_structp png_ptr, png_infop info_ptr, + int unit, png_const_charp swidth, png_const_charp sheight)); #endif /* PNG_sCAL_SUPPORTED */ -#ifdef PNG_sCAL_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, int unit, double width, double height)); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr, - png_infop info_ptr, int unit, png_charp swidth, png_charp sheight)); -#endif -#endif -#endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ - #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED /* Provide a list of chunks and how they are to be handled, if the built-in handling or default unknown chunk handling is not desired. Any chunks not listed will be handled in the default manner. The IHDR and IEND chunks - must not be listed. - keep = 0: follow default behaviour - = 1: do not keep - = 2: keep only if safe-to-copy - = 3: keep even if unsafe-to-copy + must not be listed. Because this turns off the default handling for chunks + that would otherwise be recognized the behavior of libpng transformations may + well become incorrect! + keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior + = 1: PNG_HANDLE_CHUNK_NEVER: do not keep + = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy + = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy */ -PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp - png_ptr, int keep, png_bytep chunk_list, int num_chunks)); -PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep - chunk_name)); +PNG_EXPORT(172, void, png_set_keep_unknown_chunks, + (png_structp png_ptr, int keep, + png_const_bytep chunk_list, int num_chunks)); + +/* The handling code is returned; the result is therefore true (non-zero) if + * special handling is required, false for the default handling. + */ +PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, + png_const_bytep chunk_name)); #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)); -PNG_EXPORT(void, png_set_unknown_chunk_location) - PNGARG((png_structp png_ptr, png_infop info_ptr, int chunk, int location)); -PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp - png_ptr, png_infop info_ptr, png_unknown_chunkpp entries)); +PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, + png_infop info_ptr, png_const_unknown_chunkp unknowns, + int num_unknowns)); +PNG_EXPORT(175, void, png_set_unknown_chunk_location, + (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); +PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, + png_const_infop info_ptr, png_unknown_chunkpp entries)); #endif /* Png_free_data() will turn off the "valid" flag for anything it frees. * If you need to turn it off for a chunk that your application has freed, * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); */ -PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr, - png_infop info_ptr, int mask)); +PNG_EXPORT(177, void, png_set_invalid, + (png_structp png_ptr, png_infop info_ptr, int mask)); #ifdef PNG_INFO_IMAGE_SUPPORTED /* The "params" pointer is currently not used and is for future expansion. */ -PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr, - png_infop info_ptr, - int transforms, - png_voidp params)); -PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr, - png_infop info_ptr, - int transforms, - png_voidp params)); -#endif - -PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr)); -PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr)); -PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp - png_ptr)); -PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr)); +PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, + int transforms, png_voidp params)); +PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, + int transforms, png_voidp params)); +#endif + +PNG_EXPORT(180, png_const_charp, png_get_copyright, + (png_const_structp png_ptr)); +PNG_EXPORT(181, png_const_charp, png_get_header_ver, + (png_const_structp png_ptr)); +PNG_EXPORT(182, png_const_charp, png_get_header_version, + (png_const_structp png_ptr)); +PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, + (png_const_structp png_ptr)); #ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp - png_ptr, png_uint_32 mng_features_permitted)); +PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, + png_uint_32 mng_features_permitted)); #endif /* For use in png_set_keep_unknown, added to version 1.2.6 */ @@ -2524,74 +2377,144 @@ PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp * messages before passing them to the error or warning handler. */ #ifdef PNG_ERROR_NUMBERS_SUPPORTED -PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp - png_ptr, png_uint_32 strip_mode)); +PNG_EXPORT(185, void, png_set_strip_error_numbers, + (png_structp png_ptr, + png_uint_32 strip_mode)); #endif /* Added in libpng-1.2.6 */ #ifdef PNG_SET_USER_LIMITS_SUPPORTED -PNG_EXPORT(void,png_set_user_limits) PNGARG((png_structp - png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max)); -PNG_EXPORT(png_uint_32,png_get_user_width_max) PNGARG((png_structp - png_ptr)); -PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp - png_ptr)); +PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, + png_uint_32 user_width_max, png_uint_32 user_height_max)); +PNG_EXPORT(187, png_uint_32, png_get_user_width_max, + (png_const_structp png_ptr)); +PNG_EXPORT(188, png_uint_32, png_get_user_height_max, + (png_const_structp png_ptr)); /* Added in libpng-1.4.0 */ -PNG_EXPORT(void,png_set_chunk_cache_max) PNGARG((png_structp - png_ptr, png_uint_32 user_chunk_cache_max)); -PNG_EXPORT(png_uint_32,png_get_chunk_cache_max) - PNGARG((png_structp png_ptr)); +PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, + png_uint_32 user_chunk_cache_max)); +PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, + (png_const_structp png_ptr)); /* Added in libpng-1.4.1 */ -PNG_EXPORT(void,png_set_chunk_malloc_max) PNGARG((png_structp - png_ptr, png_alloc_size_t user_chunk_cache_max)); -PNG_EXPORT(png_alloc_size_t,png_get_chunk_malloc_max) - PNGARG((png_structp png_ptr)); +PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, + png_alloc_size_t user_chunk_cache_max)); +PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, + (png_const_structp png_ptr)); #endif -#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) -PNG_EXPORT(png_uint_32,png_get_pixels_per_inch) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +#if defined(PNG_INCH_CONVERSIONS_SUPPORTED) +PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, + (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_EXPORT(png_uint_32,png_get_x_pixels_per_inch) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, + (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_EXPORT(png_uint_32,png_get_y_pixels_per_inch) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, + (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_EXPORT(float,png_get_x_offset_inches) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +PNG_FP_EXPORT(196, float, png_get_x_offset_inches, + (png_const_structp png_ptr, png_const_infop info_ptr)); +#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ +PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, + (png_structp png_ptr, png_const_infop info_ptr)); +#endif -PNG_EXPORT(float,png_get_y_offset_inches) PNGARG((png_structp png_ptr, -png_infop info_ptr)); +PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, + png_const_infop info_ptr)); +#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ +PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, + (png_structp png_ptr, png_const_infop info_ptr)); +#endif -#ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_pHYs_dpi) PNGARG((png_structp png_ptr, -png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); -#endif /* PNG_pHYs_SUPPORTED */ -#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ +# ifdef PNG_pHYs_SUPPORTED +PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, + png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, + int *unit_type)); +# endif /* PNG_pHYs_SUPPORTED */ +#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ /* Added in libpng-1.4.0 */ #ifdef PNG_IO_STATE_SUPPORTED -PNG_EXPORT(png_uint_32,png_get_io_state) PNGARG((png_structp png_ptr)); +PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); -PNG_EXPORT(png_bytep,png_get_io_chunk_name) - PNGARG((png_structp png_ptr)); +PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name, + (png_structp png_ptr), PNG_DEPRECATED); +PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, + (png_const_structp png_ptr)); /* The flags returned by png_get_io_state() are the following: */ -#define PNG_IO_NONE 0x0000 /* no I/O at this moment */ -#define PNG_IO_READING 0x0001 /* currently reading */ -#define PNG_IO_WRITING 0x0002 /* currently writing */ -#define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ -#define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ -#define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ -#define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ -#define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ -#define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ +# define PNG_IO_NONE 0x0000 /* no I/O at this moment */ +# define PNG_IO_READING 0x0001 /* currently reading */ +# define PNG_IO_WRITING 0x0002 /* currently writing */ +# define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ +# define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ +# define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ +# define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ +# define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ +# define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ #endif /* ?PNG_IO_STATE_SUPPORTED */ -/* Maintainer: Put new public prototypes here ^, in libpng.3, and project - * defs +/* Interlace support. The following macros are always defined so that if + * libpng interlace handling is turned off the macros may be used to handle + * interlaced images within the application. + */ +#define PNG_INTERLACE_ADAM7_PASSES 7 + +/* Two macros to return the first row and first column of the original, + * full, image which appears in a given pass. 'pass' is in the range 0 + * to 6 and the result is in the range 0 to 7. + */ +#define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7) +#define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7) + +/* A macro to return the offset between pixels in the output row for a pair of + * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that + * follows. Note that ROW_OFFSET is the offset from one row to the next whereas + * COL_OFFSET is from one column to the next, within a row. + */ +#define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8) +#define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1)) + +/* Two macros to help evaluate the number of rows or columns in each + * pass. This is expressed as a shift - effectively log2 of the number or + * rows or columns in each 8x8 tile of the original image. + */ +#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) +#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) + +/* Hence two macros to determine the number of rows or columns in a given + * pass of an image given its height or width. In fact these macros may + * return non-zero even though the sub-image is empty, because the other + * dimension may be empty for a small image. + */ +#define PNG_PASS_ROWS(height, pass) (((height)+(((1<>PNG_PASS_ROW_SHIFT(pass)) +#define PNG_PASS_COLS(width, pass) (((width)+(((1<>PNG_PASS_COL_SHIFT(pass)) + +/* For the reader row callbacks (both progressive and sequential) it is + * necessary to find the row in the output image given a row in an interlaced + * image, so two more macros: + */ +#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ + (((yIn)<>(((7-(off))-(pass))<<2)) & 0xF) | \ + ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0)) + +#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ + ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) +#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ + ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED /* With these routines we avoid an integer divide, which will be slower on @@ -2606,35 +2529,62 @@ PNG_EXPORT(png_bytep,png_get_io_chunk_name) * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] */ - /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ + /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ # define png_composite(composite, fg, alpha, bg) \ { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ * (png_uint_16)(alpha) \ + (png_uint_16)(bg)*(png_uint_16)(255 \ - - (png_uint_16)(alpha)) + (png_uint_16)128); \ + - (png_uint_16)(alpha)) + 128); \ (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } # define png_composite_16(composite, fg, alpha, bg) \ { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ * (png_uint_32)(alpha) \ - + (png_uint_32)(bg)*(png_uint_32)(65535L \ - - (png_uint_32)(alpha)) + (png_uint_32)32768L); \ + + (png_uint_32)(bg)*(65535 \ + - (png_uint_32)(alpha)) + 32768); \ (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } #else /* Standard method using integer division */ -# define png_composite(composite, fg, alpha, bg) \ - (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ - (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ - (png_uint_16)127) / 255) +# define png_composite(composite, fg, alpha, bg) \ + (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ + (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ + 127) / 255) # define png_composite_16(composite, fg, alpha, bg) \ (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ - (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \ - (png_uint_32)32767) / (png_uint_32)65535L) + (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ + 32767) / 65535) #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ +#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED +PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); +PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); +PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); +#endif + +PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, + png_const_bytep buf)); +/* No png_get_int_16 -- may be added if there's a real need for it. */ + +/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ +#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED +PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i)); +#endif +#ifdef PNG_SAVE_INT_32_SUPPORTED +PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i)); +#endif + +/* Place a 16-bit number into a buffer in PNG byte order. + * The parameter is declared unsigned int, not png_uint_16, + * just to avoid potential problems on pre-ANSI C compilers. + */ +#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED +PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); +/* No png_save_int_16 -- may be added if there's a real need for it. */ +#endif + #ifdef PNG_USE_READ_MACROS /* Inline macros to do direct reads of bytes from the input buffer. * The png_get_int_32() routine assumes we are using two's complement @@ -2645,50 +2595,32 @@ PNG_EXPORT(png_bytep,png_get_io_chunk_name) ((png_uint_32)(*((buf) + 1)) << 16) + \ ((png_uint_32)(*((buf) + 2)) << 8) + \ ((png_uint_32)(*((buf) + 3)))) + + /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the + * function) incorrectly returned a value of type png_uint_32. + */ # define png_get_uint_16(buf) \ - (((png_uint_32)(*(buf)) << 8) + \ - ((png_uint_32)(*((buf) + 1)))) + ((png_uint_16) \ + (((unsigned int)(*(buf)) << 8) + \ + ((unsigned int)(*((buf) + 1))))) + # define png_get_int_32(buf) \ ((png_int_32)((*(buf) & 0x80) \ - ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffff)+1)) \ + ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ : (png_int_32)png_get_uint_32(buf))) -#else -PNG_EXPORT(png_uint_32,png_get_uint_32) PNGARG((png_bytep buf)); -PNG_EXPORT(png_uint_16,png_get_uint_16) PNGARG((png_bytep buf)); -#ifdef PNG_GET_INT_32_SUPPORTED -PNG_EXPORT(png_int_32,png_get_int_32) PNGARG((png_bytep buf)); #endif -#endif -PNG_EXPORT(png_uint_32,png_get_uint_31) - PNGARG((png_structp png_ptr, png_bytep buf)); -/* No png_get_int_16 -- may be added if there's a real need for it. */ -/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ -PNG_EXPORT(void,png_save_uint_32) - PNGARG((png_bytep buf, png_uint_32 i)); -PNG_EXPORT(void,png_save_int_32) - PNGARG((png_bytep buf, png_int_32 i)); - -/* Place a 16-bit number into a buffer in PNG byte order. - * The parameter is declared unsigned int, not png_uint_16, - * just to avoid potential problems on pre-ANSI C compilers. +/* Maintainer: Put new public prototypes here ^, in libpng.3, and project + * defs */ -PNG_EXPORT(void,png_save_uint_16) - PNGARG((png_bytep buf, unsigned int i)); -/* No png_save_int_16 -- may be added if there's a real need for it. */ -/* ************************************************************************* */ - -/* Various modes of operation. Note that after an init, mode is set to - * zero automatically when the structure is created. +/* The last ordinal number (this is the *last* one already used; the next + * one to use is one more than this.) Maintainer, remember to add an entry to + * scripts/symbols.def as well. */ -#define PNG_HAVE_IHDR 0x01 -#define PNG_HAVE_PLTE 0x02 -#define PNG_HAVE_IDAT 0x04 -#define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */ -#define PNG_HAVE_IEND 0x10 -#define PNG_HAVE_gAMA 0x20 -#define PNG_HAVE_cHRM 0x40 +#ifdef PNG_EXPORT_LAST_ORDINAL + PNG_EXPORT_LAST_ORDINAL(233); +#endif #ifdef __cplusplus } diff --git a/src/png/pngconf.h b/src/png/pngconf.h index 7c3f8c1333..1d936c2b4a 100644 --- a/src/png/pngconf.h +++ b/src/png/pngconf.h @@ -1,9 +1,9 @@ /* pngconf.h - machine configurable file for libpng * - * libpng version 1.4.4 - September 23, 2010 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * libpng version 1.5.6 - November 3, 2011 + * + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -26,290 +26,57 @@ #define PNG_NO_SNPRINTF #endif -#ifndef PNG_NO_LIMITS_H -# include -#endif - -/* Added at libpng-1.2.9 */ - -/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" - * script. +#ifndef PNG_BUILDING_SYMBOL_TABLE +/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C + * definition file for machine specific limits, this may impact the + * correctness of the definitons below (see uses of INT_MAX). */ -#ifdef PNG_CONFIGURE_LIBPNG -# ifdef HAVE_CONFIG_H -# include "config.h" +# ifndef PNG_NO_LIMITS_H +# include # endif -#endif -/* - * Added at libpng-1.2.8 - * - * PNG_USER_CONFIG has to be defined on the compiler command line. This - * includes the resource compiler for Windows DLL configurations. +/* For the memory copy APIs (i.e. the standard definitions of these), + * because this file defines png_memcpy and so on the base APIs must + * be defined here. */ -#ifdef PNG_USER_CONFIG -# include "pngusr.h" -# ifndef PNG_USER_PRIVATEBUILD -# define PNG_USER_PRIVATEBUILD -# endif -#endif - -/* - * If you create a private DLL you should define in "pngusr.h" the following: - * #define PNG_USER_PRIVATEBUILD - * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons." - * #define PNG_USER_DLLFNAME_POSTFIX - * e.g. // private DLL "libpng14gx.dll" - * #define PNG_USER_DLLFNAME_POSTFIX "gx" - * - * The following macros are also at your disposal if you want to complete the - * DLL VERSIONINFO structure. - * - PNG_USER_VERSIONINFO_COMMENTS - * - PNG_USER_VERSIONINFO_COMPANYNAME - * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS - */ - -#ifdef __STDC__ -# ifdef SPECIALBUILD -# pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\ - are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.") -# endif - -# ifdef PRIVATEBUILD -# pragma message("PRIVATEBUILD is deprecated.\ - Use PNG_USER_PRIVATEBUILD instead.") -# define PNG_USER_PRIVATEBUILD PRIVATEBUILD +# ifdef BSD +# include +# else +# include # endif -#endif /* __STDC__ */ -/* End of material added to libpng-1.2.8 */ - -#ifndef PNG_VERSION_INFO_ONLY - -/* This is the size of the compression buffer, and thus the size of - * an IDAT chunk. Make this whatever size you feel is best for your - * machine. One of these will be allocated per png_struct. When this - * is full, it writes the data to the disk, and does some other - * calculations. Making this an extremely small size will slow - * the library down, but you may want to experiment to determine - * where it becomes significant, if you are concerned with memory - * usage. Note that zlib allocates at least 32Kb also. For readers, - * this describes the size of the buffer available to read the data in. - * Unless this gets smaller than the size of a row (compressed), - * it should not make much difference how big this is. +/* For png_FILE_p - this provides the standard definition of a + * FILE */ - -#ifndef PNG_ZBUF_SIZE -# define PNG_ZBUF_SIZE 8192 -#endif - -/* Enable if you want a write-only libpng */ - -#ifndef PNG_NO_READ_SUPPORTED -# define PNG_READ_SUPPORTED -#endif - -/* Enable if you want a read-only libpng */ - -#ifndef PNG_NO_WRITE_SUPPORTED -# define PNG_WRITE_SUPPORTED -#endif - -/* Enabled in 1.4.0. */ -#ifdef PNG_ALLOW_BENIGN_ERRORS -# define png_benign_error png_warning -# define png_chunk_benign_error png_chunk_warning -#else -# ifndef PNG_BENIGN_ERRORS_SUPPORTED -# define png_benign_error png_error -# define png_chunk_benign_error png_chunk_error -# endif -#endif - -/* Added at libpng version 1.4.0 */ -#if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED) -# define PNG_WARNINGS_SUPPORTED -#endif - -/* Added at libpng version 1.4.0 */ -#if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED) -# define PNG_ERROR_TEXT_SUPPORTED -#endif - -/* Added at libpng version 1.4.0 */ -#if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED) -# define PNG_CHECK_cHRM_SUPPORTED -#endif - -/* Added at libpng version 1.4.0 */ -#if !defined(PNG_NO_ALIGNED_MEMORY) && !defined(PNG_ALIGNED_MEMORY_SUPPORTED) -# define PNG_ALIGNED_MEMORY_SUPPORTED -#endif - -/* Enabled by default in 1.2.0. You can disable this if you don't need to - support PNGs that are embedded in MNG datastreams */ -#ifndef PNG_NO_MNG_FEATURES -# ifndef PNG_MNG_FEATURES_SUPPORTED -# define PNG_MNG_FEATURES_SUPPORTED -# endif -#endif - -/* Added at libpng version 1.4.0 */ -#ifndef PNG_NO_FLOATING_POINT_SUPPORTED -# ifndef PNG_FLOATING_POINT_SUPPORTED -# define PNG_FLOATING_POINT_SUPPORTED +# ifdef PNG_STDIO_SUPPORTED +# include # endif #endif -/* Added at libpng-1.4.0beta49 for testing (this test is no longer used - in libpng and png_calloc() is always present) - */ -#define PNG_CALLOC_SUPPORTED - -/* If you are running on a machine where you cannot allocate more - * than 64K of memory at once, uncomment this. While libpng will not - * normally need that much memory in a chunk (unless you load up a very - * large file), zlib needs to know how big of a chunk it can use, and - * libpng thus makes sure to check any memory allocation to verify it - * will fit into memory. -#define PNG_MAX_MALLOC_64K +/* This controls optimization of the reading of 16 and 32 bit values + * from PNG files. It can be set on a per-app-file basis - it + * just changes whether a macro is used to the function is called. + * The library builder sets the default, if read functions are not + * built into the library the macro implementation is forced on. */ -#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) -# define PNG_MAX_MALLOC_64K +#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED +# define PNG_USE_READ_MACROS #endif - -/* Special munging to support doing things the 'cygwin' way: - * 'Normal' png-on-win32 defines/defaults: - * PNG_BUILD_DLL -- building dll - * PNG_USE_DLL -- building an application, linking to dll - * (no define) -- building static library, or building an - * application and linking to the static lib - * 'Cygwin' defines/defaults: - * PNG_BUILD_DLL -- (ignored) building the dll - * (no define) -- (ignored) building an application, linking to the dll - * PNG_STATIC -- (ignored) building the static lib, or building an - * application that links to the static lib. - * ALL_STATIC -- (ignored) building various static libs, or building an - * application that links to the static libs. - * Thus, - * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and - * this bit of #ifdefs will define the 'correct' config variables based on - * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but - * unnecessary. - * - * Also, the precedence order is: - * ALL_STATIC (since we can't #undef something outside our namespace) - * PNG_BUILD_DLL - * PNG_STATIC - * (nothing) == PNG_USE_DLL - * - * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent - * of auto-import in binutils, we no longer need to worry about - * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore, - * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes - * to __declspec() stuff. However, we DO need to worry about - * PNG_BUILD_DLL and PNG_STATIC because those change some defaults - * such as CONSOLE_IO. - */ -#ifdef __CYGWIN__ -# ifdef ALL_STATIC -# ifdef PNG_BUILD_DLL -# undef PNG_BUILD_DLL -# endif -# ifdef PNG_USE_DLL -# undef PNG_USE_DLL -# endif -# ifdef PNG_DLL -# undef PNG_DLL -# endif -# ifndef PNG_STATIC -# define PNG_STATIC -# endif -# else -# ifdef PNG_BUILD_DLL -# ifdef PNG_STATIC -# undef PNG_STATIC -# endif -# ifdef PNG_USE_DLL -# undef PNG_USE_DLL -# endif -# ifndef PNG_DLL -# define PNG_DLL -# endif -# else -# ifdef PNG_STATIC -# ifdef PNG_USE_DLL -# undef PNG_USE_DLL -# endif -# ifdef PNG_DLL -# undef PNG_DLL -# endif -# else -# ifndef PNG_USE_DLL -# define PNG_USE_DLL -# endif -# ifndef PNG_DLL -# define PNG_DLL -# endif -# endif -# endif +#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) +# if PNG_DEFAULT_READ_MACROS +# define PNG_USE_READ_MACROS # endif #endif -/* This protects us against compilers that run on a windowing system - * and thus don't have or would rather us not use the stdio types: - * stdin, stdout, and stderr. The only one currently used is stderr - * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will - * prevent these from being compiled and used. #defining PNG_NO_STDIO - * will also prevent these, plus will prevent the entire set of stdio - * macros and functions (FILE *, printf, etc.) from being compiled and used, - * unless (PNG_DEBUG > 0) has been #defined. +/* COMPILER SPECIFIC OPTIONS. * - * #define PNG_NO_CONSOLE_IO - * #define PNG_NO_STDIO + * These options are provided so that a variety of difficult compilers + * can be used. Some are fixed at build time (e.g. PNG_API_RULE + * below) but still have compiler specific implementations, others + * may be changed on a per-file basis when compiling against libpng. */ -#ifdef _WIN32_WCE -# define PNG_NO_CONSOLE_IO -# define PNG_NO_STDIO -# define PNG_NO_TIME_RFC1123 -# ifdef PNG_DEBUG -# undef PNG_DEBUG -# endif -#endif - -#if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED) -# define PNG_STDIO_SUPPORTED -#endif - -#ifdef PNG_BUILD_DLL -# if !defined(PNG_CONSOLE_IO_SUPPORTED) && !defined(PNG_NO_CONSOLE_IO) -# define PNG_NO_CONSOLE_IO -# endif -#endif - -# ifdef PNG_NO_STDIO -# ifndef PNG_NO_CONSOLE_IO -# define PNG_NO_CONSOLE_IO -# endif -# ifdef PNG_DEBUG -# if (PNG_DEBUG > 0) -# include -# endif -# endif -# else -# include -# endif - -#if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED) -# define PNG_CONSOLE_IO_SUPPORTED -#endif - -/* This macro protects us against machines that don't have function +/* The PNGARG macro protects us against machines that don't have function * prototypes (ie K&R style headers). If your compiler does not handle * function prototypes, define this macro and use the included ansi2knr. * I've always been able to use _NO_PROTO as the indicator, but you may @@ -318,790 +85,352 @@ */ #ifndef PNGARG -#ifdef OF /* zlib prototype munger */ -# define PNGARG(arglist) OF(arglist) -#else +# ifdef OF /* zlib prototype munger */ +# define PNGARG(arglist) OF(arglist) +# else -#ifdef _NO_PROTO -# define PNGARG(arglist) () -#else -# define PNGARG(arglist) arglist -#endif /* _NO_PROTO */ +# ifdef _NO_PROTO +# define PNGARG(arglist) () +# else +# define PNGARG(arglist) arglist +# endif /* _NO_PROTO */ -#endif /* OF */ +# endif /* OF */ #endif /* PNGARG */ -/* Try to determine if we are compiling on a Mac. Note that testing for - * just __MWERKS__ is not good enough, because the Codewarrior is now used - * on non-Mac platforms. - */ -#ifndef MACOS -# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ - defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC) -# define MACOS -# endif -#endif - -/* Enough people need this for various reasons to include it here */ -#if !defined(MACOS) && !defined(RISCOS) -# include -#endif - -/* PNG_SETJMP_NOT_SUPPORTED and PNG_NO_SETJMP_SUPPORTED are deprecated. */ -#if !defined(PNG_NO_SETJMP) && \ - !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED) -# define PNG_SETJMP_SUPPORTED -#endif - -#ifdef PNG_SETJMP_SUPPORTED -/* This is an attempt to force a single setjmp behaviour on Linux. If - * the X config stuff didn't define _BSD_SOURCE we wouldn't need this. +/* Function calling conventions. + * ============================= + * Normally it is not necessary to specify to the compiler how to call + * a function - it just does it - however on x86 systems derived from + * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems + * and some others) there are multiple ways to call a function and the + * default can be changed on the compiler command line. For this reason + * libpng specifies the calling convention of every exported function and + * every function called via a user supplied function pointer. This is + * done in this file by defining the following macros: * - * You can bypass this test if you know that your application uses exactly - * the same setjmp.h that was included when libpng was built. Only define - * PNG_SKIP_SETJMP_CHECK while building your application, prior to the - * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK - * while building a separate libpng library for general use. - */ - -# ifndef PNG_SKIP_SETJMP_CHECK -# ifdef __linux__ -# ifdef _BSD_SOURCE -# define PNG_SAVE_BSD_SOURCE -# undef _BSD_SOURCE -# endif -# ifdef _SETJMP_H - /* If you encounter a compiler error here, see the explanation - * near the end of INSTALL. - */ - __pngconf.h__ in libpng already includes setjmp.h; - __dont__ include it again.; -# endif -# endif /* __linux__ */ -# endif /* PNG_SKIP_SETJMP_CHECK */ - - /* Include setjmp.h for error handling */ -# include - -# ifdef __linux__ -# ifdef PNG_SAVE_BSD_SOURCE -# ifdef _BSD_SOURCE -# undef _BSD_SOURCE -# endif -# define _BSD_SOURCE -# undef PNG_SAVE_BSD_SOURCE -# endif -# endif /* __linux__ */ -#endif /* PNG_SETJMP_SUPPORTED */ - -#ifdef BSD -# include -#else -# include -#endif - -/* Other defines for things like memory and the like can go here. */ - -/* This controls how fine the quantizing gets. As this allocates - * a largish chunk of memory (32K), those who are not as concerned - * with quantizing quality can decrease some or all of these. - */ - -/* Prior to libpng-1.4.2, these were PNG_DITHER_*_BITS - * These migration aids will be removed from libpng-1.5.0. - */ -#ifdef PNG_DITHER_RED_BITS -# define PNG_QUANTIZE_RED_BITS PNG_DITHER_RED_BITS -#endif -#ifdef PNG_DITHER_GREEN_BITS -# define PNG_QUANTIZE_GREEN_BITS PNG_DITHER_GREEN_BITS -#endif -#ifdef PNG_DITHER_BLUE_BITS -# define PNG_QUANTIZE_BLUE_BITS PNG_DITHER_BLUE_BITS -#endif - -#ifndef PNG_QUANTIZE_RED_BITS -# define PNG_QUANTIZE_RED_BITS 5 -#endif -#ifndef PNG_QUANTIZE_GREEN_BITS -# define PNG_QUANTIZE_GREEN_BITS 5 -#endif -#ifndef PNG_QUANTIZE_BLUE_BITS -# define PNG_QUANTIZE_BLUE_BITS 5 -#endif - -/* This controls how fine the gamma correction becomes when you - * are only interested in 8 bits anyway. Increasing this value - * results in more memory being used, and more pow() functions - * being called to fill in the gamma tables. Don't set this value - * less then 8, and even that may not work (I haven't tested it). - */ - -#ifndef PNG_MAX_GAMMA_8 -# define PNG_MAX_GAMMA_8 11 -#endif - -/* This controls how much a difference in gamma we can tolerate before - * we actually start doing gamma conversion. - */ -#ifndef PNG_GAMMA_THRESHOLD -# define PNG_GAMMA_THRESHOLD 0.05 -#endif - -/* The following uses const char * instead of char * for error - * and warning message functions, so some compilers won't complain. - * If you do not want to use const, define PNG_NO_CONST. - */ - -#ifndef PNG_CONST -# ifndef PNG_NO_CONST -# define PNG_CONST const -# else -# define PNG_CONST + * PNGAPI Calling convention for exported functions. + * PNGCBAPI Calling convention for user provided (callback) functions. + * PNGCAPI Calling convention used by the ANSI-C library (required + * for longjmp callbacks and sometimes used internally to + * specify the calling convention for zlib). + * + * These macros should never be overridden. If it is necessary to + * change calling convention in a private build this can be done + * by setting PNG_API_RULE (which defaults to 0) to one of the values + * below to select the correct 'API' variants. + * + * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. + * This is correct in every known environment. + * PNG_API_RULE=1 Use the operating system convention for PNGAPI and + * the 'C' calling convention (from PNGCAPI) for + * callbacks (PNGCBAPI). This is no longer required + * in any known environment - if it has to be used + * please post an explanation of the problem to the + * libpng mailing list. + * + * These cases only differ if the operating system does not use the C + * calling convention, at present this just means the above cases + * (x86 DOS/Windows sytems) and, even then, this does not apply to + * Cygwin running on those systems. + * + * Note that the value must be defined in pnglibconf.h so that what + * the application uses to call the library matches the conventions + * set when building the library. + */ + +/* Symbol export + * ============= + * When building a shared library it is almost always necessary to tell + * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' + * is used to mark the symbols. On some systems these symbols can be + * extracted at link time and need no special processing by the compiler, + * on other systems the symbols are flagged by the compiler and just + * the declaration requires a special tag applied (unfortunately) in a + * compiler dependent way. Some systems can do either. + * + * A small number of older systems also require a symbol from a DLL to + * be flagged to the program that calls it. This is a problem because + * we do not know in the header file included by application code that + * the symbol will come from a shared library, as opposed to a statically + * linked one. For this reason the application must tell us by setting + * the magic flag PNG_USE_DLL to turn on the special processing before + * it includes png.h. + * + * Four additional macros are used to make this happen: + * + * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from + * the build or imported if PNG_USE_DLL is set - compiler + * and system specific. + * + * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to + * 'type', compiler specific. + * + * PNG_DLL_EXPORT Set to the magic to use during a libpng build to + * make a symbol exported from the DLL. Not used in the + * public header files; see pngpriv.h for how it is used + * in the libpng build. + * + * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come + * from a DLL - used to define PNG_IMPEXP when + * PNG_USE_DLL is set. + */ + +/* System specific discovery. + * ========================== + * This code is used at build time to find PNG_IMPEXP, the API settings + * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL + * import processing is possible. On Windows/x86 systems it also sets + * compiler-specific macros to the values required to change the calling + * conventions of the various functions. + */ +#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ + defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\ + ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\ + defined(_M_X64) || defined(_M_IA64) ) + /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes + * builds under Cygwin or MinGW. Also includes Watcom builds but these need + * special treatment because they are not compatible with GCC or Visual C + * because of different calling conventions. + */ +# if PNG_API_RULE == 2 + /* If this line results in an error, either because __watcall is not + * understood or because of a redefine just below you cannot use *this* + * build of the library with the compiler you are using. *This* build was + * build using Watcom and applications must also be built using Watcom! + */ +# define PNGCAPI __watcall # endif -#endif - -/* The following defines give you the ability to remove code from the - * library that you will not be using. I wish I could figure out how to - * automate this, but I can't do that without making it seriously hard - * on the users. So if you are not using an ability, change the #define - * to an #undef, or pass in PNG_NO_feature and that part of the library - * will not be compiled. - - * If your linker can't find a function, you may want to make sure the - * ability is defined here. Some of these depend upon some others being - * defined. I haven't figured out all the interactions here, so you may - * have to experiment awhile to get everything to compile. If you are - * creating or using a shared library, you probably shouldn't touch this, - * as it will affect the size of the structures, and this will cause bad - * things to happen if the library and/or application ever change. - */ - -/* Any features you will not be using can be undef'ed here */ - -/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user - * to turn it off with PNG_NO_READ|WRITE_TRANSFORMS on the compile line, - * then pick and choose which ones to define without having to edit this - * file. It is safe to use the PNG_NO_READ|WRITE_TRANSFORMS - * if you only want to have a png-compliant reader/writer but don't need - * any of the extra transformations. This saves about 80 kbytes in a - * typical installation of the library. (PNG_NO_* form added in version - * 1.0.1c, for consistency; PNG_*_TRANSFORMS_NOT_SUPPORTED deprecated in - * 1.4.0) - */ - -/* Ignore attempt to turn off both floating and fixed point support */ -#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \ - !defined(PNG_NO_FIXED_POINT_SUPPORTED) -# define PNG_FIXED_POINT_SUPPORTED -#endif - -#ifdef PNG_READ_SUPPORTED -/* PNG_READ_TRANSFORMS_NOT_SUPPORTED is deprecated. */ -#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \ - !defined(PNG_NO_READ_TRANSFORMS) -# define PNG_READ_TRANSFORMS_SUPPORTED -#endif - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -# ifndef PNG_NO_READ_EXPAND -# define PNG_READ_EXPAND_SUPPORTED -# endif -# ifndef PNG_NO_READ_SHIFT -# define PNG_READ_SHIFT_SUPPORTED -# endif -# ifndef PNG_NO_READ_PACK -# define PNG_READ_PACK_SUPPORTED -# endif -# ifndef PNG_NO_READ_BGR -# define PNG_READ_BGR_SUPPORTED -# endif -# ifndef PNG_NO_READ_SWAP -# define PNG_READ_SWAP_SUPPORTED -# endif -# ifndef PNG_NO_READ_PACKSWAP -# define PNG_READ_PACKSWAP_SUPPORTED -# endif -# ifndef PNG_NO_READ_INVERT -# define PNG_READ_INVERT_SUPPORTED -# endif -# ifndef PNG_NO_READ_QUANTIZE - /* Prior to libpng-1.4.0 this was PNG_READ_DITHER_SUPPORTED */ -# ifndef PNG_NO_READ_DITHER /* This migration aid will be removed */ -# define PNG_READ_QUANTIZE_SUPPORTED +# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) +# define PNGCAPI __cdecl +# if PNG_API_RULE == 1 +# define PNGAPI __stdcall # endif +# else + /* An older compiler, or one not detected (erroneously) above, + * if necessary override on the command line to get the correct + * variants for the compiler. + */ +# ifndef PNGCAPI +# define PNGCAPI _cdecl +# endif +# if PNG_API_RULE == 1 && !defined(PNGAPI) +# define PNGAPI _stdcall +# endif +# endif /* compiler/api */ + /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ + +# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) + ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed # endif -# ifndef PNG_NO_READ_BACKGROUND -# define PNG_READ_BACKGROUND_SUPPORTED -# endif -# ifndef PNG_NO_READ_16_TO_8 -# define PNG_READ_16_TO_8_SUPPORTED -# endif -# ifndef PNG_NO_READ_FILLER -# define PNG_READ_FILLER_SUPPORTED -# endif -# ifndef PNG_NO_READ_GAMMA -# define PNG_READ_GAMMA_SUPPORTED -# endif -# ifndef PNG_NO_READ_GRAY_TO_RGB -# define PNG_READ_GRAY_TO_RGB_SUPPORTED -# endif -# ifndef PNG_NO_READ_SWAP_ALPHA -# define PNG_READ_SWAP_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_READ_INVERT_ALPHA -# define PNG_READ_INVERT_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_READ_STRIP_ALPHA -# define PNG_READ_STRIP_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_READ_USER_TRANSFORM -# define PNG_READ_USER_TRANSFORM_SUPPORTED -# endif -# ifndef PNG_NO_READ_RGB_TO_GRAY -# define PNG_READ_RGB_TO_GRAY_SUPPORTED -# endif -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -/* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */ -#if !defined(PNG_NO_PROGRESSIVE_READ) && \ - !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */ -# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */ -#endif /* about interlacing capability! You'll */ - /* still have interlacing unless you change the following define: */ - -#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */ - -/* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */ -#if !defined(PNG_NO_SEQUENTIAL_READ) && \ - !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \ - !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED) -# define PNG_SEQUENTIAL_READ_SUPPORTED -#endif - -#ifndef PNG_NO_READ_COMPOSITE_NODIV -# ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */ -# define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */ -# endif -#endif - -#if !defined(PNG_NO_GET_INT_32) || defined(PNG_READ_oFFS_SUPPORTED) || \ - defined(PNG_READ_pCAL_SUPPORTED) -# ifndef PNG_GET_INT_32_SUPPORTED -# define PNG_GET_INT_32_SUPPORTED -# endif -#endif - -#endif /* PNG_READ_SUPPORTED */ - -#ifdef PNG_WRITE_SUPPORTED - -/* PNG_WRITE_TRANSFORMS_NOT_SUPPORTED is deprecated. */ -#if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \ - !defined(PNG_NO_WRITE_TRANSFORMS) -# define PNG_WRITE_TRANSFORMS_SUPPORTED -#endif - -#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED -# ifndef PNG_NO_WRITE_SHIFT -# define PNG_WRITE_SHIFT_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_PACK -# define PNG_WRITE_PACK_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_BGR -# define PNG_WRITE_BGR_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_SWAP -# define PNG_WRITE_SWAP_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_PACKSWAP -# define PNG_WRITE_PACKSWAP_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_INVERT -# define PNG_WRITE_INVERT_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_FILLER -# define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */ -# endif -# ifndef PNG_NO_WRITE_SWAP_ALPHA -# define PNG_WRITE_SWAP_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_INVERT_ALPHA -# define PNG_WRITE_INVERT_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_USER_TRANSFORM -# define PNG_WRITE_USER_TRANSFORM_SUPPORTED -# endif -#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */ - -#if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \ - !defined(PNG_WRITE_INTERLACING_SUPPORTED) - /* This is not required for PNG-compliant encoders, but can cause - * trouble if left undefined - */ -# define PNG_WRITE_INTERLACING_SUPPORTED -#endif - -#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \ - !defined(PNG_WRITE_WEIGHTED_FILTER) && \ - defined(PNG_FLOATING_POINT_SUPPORTED) -# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED -#endif - -#ifndef PNG_NO_WRITE_FLUSH -# define PNG_WRITE_FLUSH_SUPPORTED -#endif - -#if !defined(PNG_NO_SAVE_INT_32) || defined(PNG_WRITE_oFFS_SUPPORTED) || \ - defined(PNG_WRITE_pCAL_SUPPORTED) -# ifndef PNG_SAVE_INT_32_SUPPORTED -# define PNG_SAVE_INT_32_SUPPORTED -# endif -#endif - -#endif /* PNG_WRITE_SUPPORTED */ - -#define PNG_NO_ERROR_NUMBERS - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) -# ifndef PNG_NO_USER_TRANSFORM_PTR -# define PNG_USER_TRANSFORM_PTR_SUPPORTED -# endif -#endif - -#if defined(PNG_STDIO_SUPPORTED) && !defined(PNG_TIME_RFC1123_SUPPORTED) -# define PNG_TIME_RFC1123_SUPPORTED -#endif - -/* This adds extra functions in pngget.c for accessing data from the - * info pointer (added in version 0.99) - * png_get_image_width() - * png_get_image_height() - * png_get_bit_depth() - * png_get_color_type() - * png_get_compression_type() - * png_get_filter_type() - * png_get_interlace_type() - * png_get_pixel_aspect_ratio() - * png_get_pixels_per_meter() - * png_get_x_offset_pixels() - * png_get_y_offset_pixels() - * png_get_x_offset_microns() - * png_get_y_offset_microns() - */ -#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED) -# define PNG_EASY_ACCESS_SUPPORTED -#endif - -/* Added at libpng-1.2.0 */ -#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED) -# define PNG_USER_MEM_SUPPORTED -#endif - -/* Added at libpng-1.2.6 */ -#ifndef PNG_NO_SET_USER_LIMITS -# ifndef PNG_SET_USER_LIMITS_SUPPORTED -# define PNG_SET_USER_LIMITS_SUPPORTED -# endif - /* Feature added at libpng-1.4.0, this flag added at 1.4.1 */ -# ifndef PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED -# define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED -# endif - /* Feature added at libpng-1.4.1, this flag added at 1.4.1 */ -# ifndef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED -# define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED -# endif -#endif - -/* Added at libpng-1.2.43 */ -#ifndef PNG_USER_LIMITS_SUPPORTED -# ifndef PNG_NO_USER_LIMITS -# define PNG_USER_LIMITS_SUPPORTED -# endif -#endif - -/* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGs no matter - * how large, set these two limits to 0x7fffffffL - */ -#ifndef PNG_USER_WIDTH_MAX -# define PNG_USER_WIDTH_MAX 1000000L -#endif -#ifndef PNG_USER_HEIGHT_MAX -# define PNG_USER_HEIGHT_MAX 1000000L -#endif - -/* Added at libpng-1.2.43. To accept all valid PNGs no matter - * how large, set these two limits to 0. - */ -#ifndef PNG_USER_CHUNK_CACHE_MAX -# define PNG_USER_CHUNK_CACHE_MAX 0 -#endif - -/* Added at libpng-1.2.43 */ -#ifndef PNG_USER_CHUNK_MALLOC_MAX -# define PNG_USER_CHUNK_MALLOC_MAX 0 -#endif - -/* Added at libpng-1.4.0 */ -#if !defined(PNG_NO_IO_STATE) && !defined(PNG_IO_STATE_SUPPORTED) -# define PNG_IO_STATE_SUPPORTED -#endif - -#ifndef PNG_LITERAL_SHARP -# define PNG_LITERAL_SHARP 0x23 -#endif -#ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET -# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b -#endif -#ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET -# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d -#endif -#ifndef PNG_STRING_NEWLINE -#define PNG_STRING_NEWLINE "\n" -#endif - -/* These are currently experimental features, define them if you want */ - -/* Very little testing */ -/* -#ifdef PNG_READ_SUPPORTED -# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED -# define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED -# endif -#endif -*/ - -/* This is only for PowerPC big-endian and 680x0 systems */ -/* some testing */ -/* -#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED -# define PNG_READ_BIG_ENDIAN_SUPPORTED -#endif -*/ - -#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) -# define PNG_USE_READ_MACROS -#endif - -/* Buggy compilers (e.g., gcc 2.7.2.2) need PNG_NO_POINTER_INDEXING */ - -#if !defined(PNG_NO_POINTER_INDEXING) && \ - !defined(PNG_POINTER_INDEXING_SUPPORTED) -# define PNG_POINTER_INDEXING_SUPPORTED -#endif - - -/* Any chunks you are not interested in, you can undef here. The - * ones that allocate memory may be expecially important (hIST, - * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info - * a bit smaller. - */ - -/* The size of the png_text structure changed in libpng-1.0.6 when - * iTXt support was added. iTXt support was turned off by default through - * libpng-1.2.x, to support old apps that malloc the png_text structure - * instead of calling png_set_text() and letting libpng malloc it. It - * was turned on by default in libpng-1.4.0. - */ - -/* PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */ -#if defined(PNG_READ_SUPPORTED) && \ - !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \ - !defined(PNG_NO_READ_ANCILLARY_CHUNKS) -# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED -#endif - -/* PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */ -#if defined(PNG_WRITE_SUPPORTED) && \ - !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \ - !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS) -# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED -#endif - -#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED - -#ifdef PNG_NO_READ_TEXT -# define PNG_NO_READ_iTXt -# define PNG_NO_READ_tEXt -# define PNG_NO_READ_zTXt -#endif - -#ifndef PNG_NO_READ_bKGD -# define PNG_READ_bKGD_SUPPORTED -# define PNG_bKGD_SUPPORTED -#endif -#ifndef PNG_NO_READ_cHRM -# define PNG_READ_cHRM_SUPPORTED -# define PNG_cHRM_SUPPORTED -#endif -#ifndef PNG_NO_READ_gAMA -# define PNG_READ_gAMA_SUPPORTED -# define PNG_gAMA_SUPPORTED -#endif -#ifndef PNG_NO_READ_hIST -# define PNG_READ_hIST_SUPPORTED -# define PNG_hIST_SUPPORTED -#endif -#ifndef PNG_NO_READ_iCCP -# define PNG_READ_iCCP_SUPPORTED -# define PNG_iCCP_SUPPORTED -#endif -#ifndef PNG_NO_READ_iTXt -# ifndef PNG_READ_iTXt_SUPPORTED -# define PNG_READ_iTXt_SUPPORTED -# endif -# ifndef PNG_iTXt_SUPPORTED -# define PNG_iTXt_SUPPORTED -# endif -#endif -#ifndef PNG_NO_READ_oFFs -# define PNG_READ_oFFs_SUPPORTED -# define PNG_oFFs_SUPPORTED -#endif -#ifndef PNG_NO_READ_pCAL -# define PNG_READ_pCAL_SUPPORTED -# define PNG_pCAL_SUPPORTED -#endif -#ifndef PNG_NO_READ_sCAL -# define PNG_READ_sCAL_SUPPORTED -# define PNG_sCAL_SUPPORTED -#endif -#ifndef PNG_NO_READ_pHYs -# define PNG_READ_pHYs_SUPPORTED -# define PNG_pHYs_SUPPORTED -#endif -#ifndef PNG_NO_READ_sBIT -# define PNG_READ_sBIT_SUPPORTED -# define PNG_sBIT_SUPPORTED -#endif -#ifndef PNG_NO_READ_sPLT -# define PNG_READ_sPLT_SUPPORTED -# define PNG_sPLT_SUPPORTED -#endif -#ifndef PNG_NO_READ_sRGB -# define PNG_READ_sRGB_SUPPORTED -# define PNG_sRGB_SUPPORTED -#endif -#ifndef PNG_NO_READ_tEXt -# define PNG_READ_tEXt_SUPPORTED -# define PNG_tEXt_SUPPORTED -#endif -#ifndef PNG_NO_READ_tIME -# define PNG_READ_tIME_SUPPORTED -# define PNG_tIME_SUPPORTED -#endif -#ifndef PNG_NO_READ_tRNS -# define PNG_READ_tRNS_SUPPORTED -# define PNG_tRNS_SUPPORTED -#endif -#ifndef PNG_NO_READ_zTXt -# define PNG_READ_zTXt_SUPPORTED -# define PNG_zTXt_SUPPORTED -#endif -#ifndef PNG_NO_READ_OPT_PLTE -# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */ -#endif /* optional PLTE chunk in RGB and RGBA images */ -#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \ - defined(PNG_READ_zTXt_SUPPORTED) -# define PNG_READ_TEXT_SUPPORTED -# define PNG_TEXT_SUPPORTED -#endif - -#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */ - -#ifndef PNG_NO_READ_UNKNOWN_CHUNKS -# ifndef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED -# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED -# endif -# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED -# define PNG_UNKNOWN_CHUNKS_SUPPORTED -# endif -# ifndef PNG_READ_USER_CHUNKS_SUPPORTED -# define PNG_READ_USER_CHUNKS_SUPPORTED -# endif -#endif -#ifndef PNG_NO_READ_USER_CHUNKS -# ifndef PNG_READ_USER_CHUNKS_SUPPORTED -# define PNG_READ_USER_CHUNKS_SUPPORTED -# endif -# ifndef PNG_USER_CHUNKS_SUPPORTED -# define PNG_USER_CHUNKS_SUPPORTED -# endif -#endif -#ifndef PNG_NO_HANDLE_AS_UNKNOWN -# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED -# endif -#endif -#ifdef PNG_WRITE_SUPPORTED -#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED +# if (defined(_MSC_VER) && _MSC_VER < 800) ||\ + (defined(__BORLANDC__) && __BORLANDC__ < 0x500) + /* older Borland and MSC + * compilers used '__export' and required this to be after + * the type. + */ +# ifndef PNG_EXPORT_TYPE +# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP +# endif +# define PNG_DLL_EXPORT __export +# else /* newer compiler */ +# define PNG_DLL_EXPORT __declspec(dllexport) +# ifndef PNG_DLL_IMPORT +# define PNG_DLL_IMPORT __declspec(dllimport) +# endif +# endif /* compiler */ + +#else /* !Windows/x86 */ +# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) +# define PNGAPI _System +# else /* !Windows/x86 && !OS/2 */ + /* Use the defaults, or define PNG*API on the command line (but + * this will have to be done for every compile!) + */ +# endif /* other system, !OS/2 */ +#endif /* !Windows/x86 */ -#ifdef PNG_NO_WRITE_TEXT -# define PNG_NO_WRITE_iTXt -# define PNG_NO_WRITE_tEXt -# define PNG_NO_WRITE_zTXt -#endif -#ifndef PNG_NO_WRITE_bKGD -# define PNG_WRITE_bKGD_SUPPORTED -# ifndef PNG_bKGD_SUPPORTED -# define PNG_bKGD_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_cHRM -# define PNG_WRITE_cHRM_SUPPORTED -# ifndef PNG_cHRM_SUPPORTED -# define PNG_cHRM_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_gAMA -# define PNG_WRITE_gAMA_SUPPORTED -# ifndef PNG_gAMA_SUPPORTED -# define PNG_gAMA_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_hIST -# define PNG_WRITE_hIST_SUPPORTED -# ifndef PNG_hIST_SUPPORTED -# define PNG_hIST_SUPPORTED -# endif +/* Now do all the defaulting . */ +#ifndef PNGCAPI +# define PNGCAPI #endif -#ifndef PNG_NO_WRITE_iCCP -# define PNG_WRITE_iCCP_SUPPORTED -# ifndef PNG_iCCP_SUPPORTED -# define PNG_iCCP_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_iTXt -# ifndef PNG_WRITE_iTXt_SUPPORTED -# define PNG_WRITE_iTXt_SUPPORTED -# endif -# ifndef PNG_iTXt_SUPPORTED -# define PNG_iTXt_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_oFFs -# define PNG_WRITE_oFFs_SUPPORTED -# ifndef PNG_oFFs_SUPPORTED -# define PNG_oFFs_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_pCAL -# define PNG_WRITE_pCAL_SUPPORTED -# ifndef PNG_pCAL_SUPPORTED -# define PNG_pCAL_SUPPORTED -# endif +#ifndef PNGCBAPI +# define PNGCBAPI PNGCAPI #endif -#ifndef PNG_NO_WRITE_sCAL -# define PNG_WRITE_sCAL_SUPPORTED -# ifndef PNG_sCAL_SUPPORTED -# define PNG_sCAL_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_pHYs -# define PNG_WRITE_pHYs_SUPPORTED -# ifndef PNG_pHYs_SUPPORTED -# define PNG_pHYs_SUPPORTED -# endif +#ifndef PNGAPI +# define PNGAPI PNGCAPI #endif -#ifndef PNG_NO_WRITE_sBIT -# define PNG_WRITE_sBIT_SUPPORTED -# ifndef PNG_sBIT_SUPPORTED -# define PNG_sBIT_SUPPORTED + +/* PNG_IMPEXP may be set on the compilation system command line or (if not set) + * then in an internal header file when building the library, otherwise (when + * using the library) it is set here. + */ +#ifndef PNG_IMPEXP +# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) + /* This forces use of a DLL, disallowing static linking */ +# define PNG_IMPEXP PNG_DLL_IMPORT # endif -#endif -#ifndef PNG_NO_WRITE_sPLT -# define PNG_WRITE_sPLT_SUPPORTED -# ifndef PNG_sPLT_SUPPORTED -# define PNG_sPLT_SUPPORTED + +# ifndef PNG_IMPEXP +# define PNG_IMPEXP # endif #endif -#ifndef PNG_NO_WRITE_sRGB -# define PNG_WRITE_sRGB_SUPPORTED -# ifndef PNG_sRGB_SUPPORTED -# define PNG_sRGB_SUPPORTED -# endif + +/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat + * 'attributes' as a storage class - the attributes go at the start of the + * function definition, and attributes are always appended regardless of the + * compiler. This considerably simplifies these macros but may cause problems + * if any compilers both need function attributes and fail to handle them as + * a storage class (this is unlikely.) + */ +#ifndef PNG_FUNCTION +# define PNG_FUNCTION(type, name, args, attributes) attributes type name args #endif -#ifndef PNG_NO_WRITE_tEXt -# define PNG_WRITE_tEXt_SUPPORTED -# ifndef PNG_tEXt_SUPPORTED -# define PNG_tEXt_SUPPORTED -# endif + +#ifndef PNG_EXPORT_TYPE +# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type #endif -#ifndef PNG_NO_WRITE_tIME -# define PNG_WRITE_tIME_SUPPORTED -# ifndef PNG_tIME_SUPPORTED -# define PNG_tIME_SUPPORTED -# endif + + /* The ordinal value is only relevant when preprocessing png.h for symbol + * table entries, so we discard it here. See the .dfn files in the + * scripts directory. + */ +#ifndef PNG_EXPORTA + +# define PNG_EXPORTA(ordinal, type, name, args, attributes)\ + PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ + extern attributes) #endif -#ifndef PNG_NO_WRITE_tRNS -# define PNG_WRITE_tRNS_SUPPORTED -# ifndef PNG_tRNS_SUPPORTED -# define PNG_tRNS_SUPPORTED -# endif + +/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, + * so make something non-empty to satisfy the requirement: + */ +#define PNG_EMPTY /*empty list*/ + +#define PNG_EXPORT(ordinal, type, name, args)\ + PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) + +/* Use PNG_REMOVED to comment out a removed interface. */ +#ifndef PNG_REMOVED +# define PNG_REMOVED(ordinal, type, name, args, attributes) #endif -#ifndef PNG_NO_WRITE_zTXt -# define PNG_WRITE_zTXt_SUPPORTED -# ifndef PNG_zTXt_SUPPORTED -# define PNG_zTXt_SUPPORTED -# endif + +#ifndef PNG_CALLBACK +# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) #endif -#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \ - defined(PNG_WRITE_zTXt_SUPPORTED) -# define PNG_WRITE_TEXT_SUPPORTED -# ifndef PNG_TEXT_SUPPORTED -# define PNG_TEXT_SUPPORTED + +/* Support for compiler specific function attributes. These are used + * so that where compiler support is available incorrect use of API + * functions in png.h will generate compiler warnings. + * + * Added at libpng-1.2.41. + */ + +#ifndef PNG_NO_PEDANTIC_WARNINGS +# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED +# define PNG_PEDANTIC_WARNINGS_SUPPORTED # endif #endif -#ifdef PNG_WRITE_tIME_SUPPORTED -# ifndef PNG_NO_CONVERT_tIME -# ifndef _WIN32_WCE -/* The "tm" structure is not supported on WindowsCE */ -# ifndef PNG_CONVERT_tIME_SUPPORTED -# define PNG_CONVERT_tIME_SUPPORTED +#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED + /* Support for compiler specific function attributes. These are used + * so that where compiler support is available incorrect use of API + * functions in png.h will generate compiler warnings. Added at libpng + * version 1.2.41. + */ +# if defined(__GNUC__) +# ifndef PNG_USE_RESULT +# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) +# endif +# ifndef PNG_NORETURN +# define PNG_NORETURN __attribute__((__noreturn__)) +# endif +# ifndef PNG_ALLOCATED +# define PNG_ALLOCATED __attribute__((__malloc__)) +# endif +# ifndef PNG_DEPRECATED +# define PNG_DEPRECATED __attribute__((__deprecated__)) +# endif +# ifndef PNG_PRIVATE +# if 0 /* Doesn't work so we use deprecated instead*/ +# define PNG_PRIVATE \ + __attribute__((warning("This function is not exported by libpng."))) +# else +# define PNG_PRIVATE \ + __attribute__((__deprecated__)) # endif -# endif -# endif -#endif +# endif +# endif /* __GNUC__ */ -#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */ +# if defined(_MSC_VER) && (_MSC_VER >= 1300) +# ifndef PNG_USE_RESULT +# define PNG_USE_RESULT /* not supported */ +# endif +# ifndef PNG_NORETURN +# define PNG_NORETURN __declspec(noreturn) +# endif +# ifndef PNG_ALLOCATED +# if defined(_MSC_VER) && (_MSC_VER >= 1300) +# define PNG_ALLOCATED __declspec(restrict) +# endif +# endif +# ifndef PNG_DEPRECATED +# define PNG_DEPRECATED __declspec(deprecated) +# endif +# ifndef PNG_PRIVATE +# define PNG_PRIVATE __declspec(deprecated) +# endif +# endif /* _MSC_VER */ +#endif /* PNG_PEDANTIC_WARNINGS */ -#ifndef PNG_NO_WRITE_FILTER -# ifndef PNG_WRITE_FILTER_SUPPORTED -# define PNG_WRITE_FILTER_SUPPORTED -# endif +#ifndef PNG_DEPRECATED +# define PNG_DEPRECATED /* Use of this function is deprecated */ #endif - -#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS -# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED -# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED -# define PNG_UNKNOWN_CHUNKS_SUPPORTED +#ifndef PNG_USE_RESULT +# define PNG_USE_RESULT /* The result of this function must be checked */ +#endif +#ifndef PNG_NORETURN +# define PNG_NORETURN /* This function does not return */ +#endif +#ifndef PNG_ALLOCATED +# define PNG_ALLOCATED /* The result of the function is new memory */ +#endif +#ifndef PNG_PRIVATE +# define PNG_PRIVATE /* This is a private libpng function */ +#endif +#ifndef PNG_FP_EXPORT /* A floating point API. */ +# ifdef PNG_FLOATING_POINT_SUPPORTED +# define PNG_FP_EXPORT(ordinal, type, name, args)\ + PNG_EXPORT(ordinal, type, name, args) +# else /* No floating point APIs */ +# define PNG_FP_EXPORT(ordinal, type, name, args) # endif #endif -#ifndef PNG_NO_HANDLE_AS_UNKNOWN -# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED +#ifndef PNG_FIXED_EXPORT /* A fixed point API. */ +# ifdef PNG_FIXED_POINT_SUPPORTED +# define PNG_FIXED_EXPORT(ordinal, type, name, args)\ + PNG_EXPORT(ordinal, type, name, args) +# else /* No fixed point APIs */ +# define PNG_FIXED_EXPORT(ordinal, type, name, args) # endif #endif -#endif /* PNG_WRITE_SUPPORTED */ -/* Turn this off to disable png_read_png() and - * png_write_png() and leave the row_pointers member - * out of the info structure. +/* The following uses const char * instead of char * for error + * and warning message functions, so some compilers won't complain. + * If you do not want to use const, define PNG_NO_CONST here. + * + * This should not change how the APIs are called, so it can be done + * on a per-file basis in the application. */ -#ifndef PNG_NO_INFO_IMAGE -# define PNG_INFO_IMAGE_SUPPORTED -#endif - -/* Need the time information for converting tIME chunks */ -#ifdef PNG_CONVERT_tIME_SUPPORTED - /* "time.h" functions are not supported on WindowsCE */ -# include +#ifndef PNG_CONST +# ifndef PNG_NO_CONST +# define PNG_CONST const +# else +# define PNG_CONST +# endif #endif /* Some typedefs to get us started. These should be safe on most of the @@ -1124,9 +453,9 @@ typedef short png_int_16; typedef unsigned char png_byte; #ifdef PNG_NO_SIZE_T - typedef unsigned int png_size_t; +typedef unsigned int png_size_t; #else - typedef size_t png_size_t; +typedef size_t png_size_t; #endif #define png_sizeof(x) (sizeof (x)) @@ -1148,20 +477,20 @@ typedef unsigned char png_byte; # else # define LDATA 0 # endif - /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ + /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) -# define PNG_MAX_MALLOC_64K +# define PNG_MAX_MALLOC_64K /* only used in build */ # if (LDATA != 1) # ifndef FAR # define FAR __far # endif # define USE_FAR_KEYWORD # endif /* LDATA != 1 */ - /* Possibly useful for moving data out of default segment. - * Uncomment it if you want. Could also define FARDATA as - * const if your compiler supports it. (SJT) -# define FARDATA FAR - */ + /* Possibly useful for moving data out of default segment. + * Uncomment it if you want. Could also define FARDATA as + * const if your compiler supports it. (SJT) +# define FARDATA FAR + */ # endif /* __WIN32__, __FLAT__, __CYGWIN__ */ #endif /* __BORLANDC__ */ @@ -1191,26 +520,37 @@ typedef unsigned char png_byte; #endif /* Typedef for floating-point numbers that are converted - to fixed-point with a multiple of 100,000, e.g., int_gamma */ + * to fixed-point with a multiple of 100,000, e.g., gamma + */ typedef png_int_32 png_fixed_point; /* Add typedefs for pointers */ -typedef void FAR * png_voidp; -typedef png_byte FAR * png_bytep; -typedef png_uint_32 FAR * png_uint_32p; -typedef png_int_32 FAR * png_int_32p; -typedef png_uint_16 FAR * png_uint_16p; -typedef png_int_16 FAR * png_int_16p; -typedef PNG_CONST char FAR * png_const_charp; -typedef char FAR * png_charp; -typedef png_fixed_point FAR * png_fixed_point_p; - -#ifndef PNG_NO_STDIO -typedef FILE * png_FILE_p; +typedef void FAR * png_voidp; +typedef PNG_CONST void FAR * png_const_voidp; +typedef png_byte FAR * png_bytep; +typedef PNG_CONST png_byte FAR * png_const_bytep; +typedef png_uint_32 FAR * png_uint_32p; +typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p; +typedef png_int_32 FAR * png_int_32p; +typedef PNG_CONST png_int_32 FAR * png_const_int_32p; +typedef png_uint_16 FAR * png_uint_16p; +typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p; +typedef png_int_16 FAR * png_int_16p; +typedef PNG_CONST png_int_16 FAR * png_const_int_16p; +typedef char FAR * png_charp; +typedef PNG_CONST char FAR * png_const_charp; +typedef png_fixed_point FAR * png_fixed_point_p; +typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p; +typedef png_size_t FAR * png_size_tp; +typedef PNG_CONST png_size_t FAR * png_const_size_tp; + +#ifdef PNG_STDIO_SUPPORTED +typedef FILE * png_FILE_p; #endif #ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * png_doublep; +typedef double FAR * png_doublep; +typedef PNG_CONST double FAR * png_const_doublep; #endif /* Pointers to pointers; i.e. arrays */ @@ -1229,277 +569,6 @@ typedef double FAR * FAR * png_doublepp; /* Pointers to pointers to pointers; i.e., pointer to array */ typedef char FAR * FAR * FAR * png_charppp; -/* Define PNG_BUILD_DLL if the module being built is a Windows - * LIBPNG DLL. - * - * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL. - * It is equivalent to Microsoft predefined macro _DLL that is - * automatically defined when you compile using the share - * version of the CRT (C Run-Time library) - * - * The cygwin mods make this behavior a little different: - * Define PNG_BUILD_DLL if you are building a dll for use with cygwin - * Define PNG_STATIC if you are building a static library for use with cygwin, - * -or- if you are building an application that you want to link to the - * static library. - * PNG_USE_DLL is defined by default (no user action needed) unless one of - * the other flags is defined. - */ - -#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL)) -# define PNG_DLL -#endif - -/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall", - * you may get warnings regarding the linkage of png_zalloc and png_zfree. - * Don't ignore those warnings; you must also reset the default calling - * convention in your compiler to match your PNGAPI, and you must build - * zlib and your applications the same way you build libpng. - */ - -#ifdef __CYGWIN__ -# undef PNGAPI -# define PNGAPI __cdecl -# undef PNG_IMPEXP -# define PNG_IMPEXP -#endif - -#ifdef __WATCOMC__ -# ifndef PNGAPI -# define PNGAPI -# endif -#endif - -#if defined(__MINGW32__) && !defined(PNG_MODULEDEF) -# ifndef PNG_NO_MODULEDEF -# define PNG_NO_MODULEDEF -# endif -#endif - -#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF) -# define PNG_IMPEXP -#endif - -#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \ - (( defined(_Windows) || defined(_WINDOWS) || \ - defined(WIN32) || defined(_WIN32) || defined(__WIN32__) )) - -# ifndef PNGAPI -# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) -# define PNGAPI __cdecl -# else -# define PNGAPI _cdecl -# endif -# endif - -# if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \ - 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */) -# define PNG_IMPEXP -# endif - -# ifndef PNG_IMPEXP - -# define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol -# define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol - - /* Borland/Microsoft */ -# if defined(_MSC_VER) || defined(__BORLANDC__) -# if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500) -# define PNG_EXPORT PNG_EXPORT_TYPE1 -# else -# define PNG_EXPORT PNG_EXPORT_TYPE2 -# ifdef PNG_BUILD_DLL -# define PNG_IMPEXP __export -# else -# define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in VC++ */ -# endif /* Exists in Borland C++ for - C++ classes (== huge) */ -# endif -# endif - -# ifndef PNG_IMPEXP -# ifdef PNG_BUILD_DLL -# define PNG_IMPEXP __declspec(dllexport) -# else -# define PNG_IMPEXP __declspec(dllimport) -# endif -# endif -# endif /* PNG_IMPEXP */ -#else /* !(DLL || non-cygwin WINDOWS) */ -# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) -# ifndef PNGAPI -# define PNGAPI _System -# endif -# else -# if 0 /* ... other platforms, with other meanings */ -# endif -# endif -#endif - -#ifndef PNGAPI -# define PNGAPI -#endif -#ifndef PNG_IMPEXP -# define PNG_IMPEXP -#endif - -#ifdef PNG_BUILDSYMS -# ifndef PNG_EXPORT -# define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END -# endif -#endif - -#ifndef PNG_EXPORT -# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol -#endif - -#define PNG_USE_LOCAL_ARRAYS /* Not used in libpng, defined for legacy apps */ - -/* Support for compiler specific function attributes. These are used - * so that where compiler support is available incorrect use of API - * functions in png.h will generate compiler warnings. - * - * Added at libpng-1.2.41. - */ - -#ifndef PNG_NO_PEDANTIC_WARNINGS -# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED -# define PNG_PEDANTIC_WARNINGS_SUPPORTED -# endif -#endif - -#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED -/* Support for compiler specific function attributes. These are used - * so that where compiler support is available incorrect use of API - * functions in png.h will generate compiler warnings. Added at libpng - * version 1.2.41. - */ -# ifdef __GNUC__ -# ifndef PNG_USE_RESULT -# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) -# endif -# ifndef PNG_NORETURN -# define PNG_NORETURN __attribute__((__noreturn__)) -# endif -# ifndef PNG_ALLOCATED -# define PNG_ALLOCATED __attribute__((__malloc__)) -# endif - - /* This specifically protects structure members that should only be - * accessed from within the library, therefore should be empty during - * a library build. - */ -# ifndef PNG_DEPRECATED -# define PNG_DEPRECATED __attribute__((__deprecated__)) -# endif -# ifndef PNG_DEPSTRUCT -# define PNG_DEPSTRUCT __attribute__((__deprecated__)) -# endif -# ifndef PNG_PRIVATE -# if 0 /* Doesn't work so we use deprecated instead*/ -# define PNG_PRIVATE \ - __attribute__((warning("This function is not exported by libpng."))) -# else -# define PNG_PRIVATE \ - __attribute__((__deprecated__)) -# endif -# endif /* PNG_PRIVATE */ -# endif /* __GNUC__ */ -#endif /* PNG_PEDANTIC_WARNINGS */ - -#ifndef PNG_DEPRECATED -# define PNG_DEPRECATED /* Use of this function is deprecated */ -#endif -#ifndef PNG_USE_RESULT -# define PNG_USE_RESULT /* The result of this function must be checked */ -#endif -#ifndef PNG_NORETURN -# define PNG_NORETURN /* This function does not return */ -#endif -#ifndef PNG_ALLOCATED -# define PNG_ALLOCATED /* The result of the function is new memory */ -#endif -#ifndef PNG_DEPSTRUCT -# define PNG_DEPSTRUCT /* Access to this struct member is deprecated */ -#endif -#ifndef PNG_PRIVATE -# define PNG_PRIVATE /* This is a private libpng function */ -#endif - -/* Users may want to use these so they are not private. Any library - * functions that are passed far data must be model-independent. - */ - -/* memory model/platform independent fns */ -#ifndef PNG_ABORT -# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) -# define PNG_ABORT() ExitProcess(0) -# else -# define PNG_ABORT() abort() -# endif -#endif - -#ifdef USE_FAR_KEYWORD -/* Use this to make far-to-near assignments */ -# define CHECK 1 -# define NOCHECK 0 -# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) -# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) -# define png_strcpy _fstrcpy -# define png_strncpy _fstrncpy /* Added to v 1.2.6 */ -# define png_strlen _fstrlen -# define png_memcmp _fmemcmp /* SJT: added */ -# define png_memcpy _fmemcpy -# define png_memset _fmemset -# define png_sprintf sprintf -#else -# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) -# /* Favor Windows over C runtime fns */ -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strcpy lstrcpyA -# define png_strncpy lstrcpynA -# define png_strlen lstrlenA -# define png_memcmp memcmp -# define png_memcpy CopyMemory -# define png_memset memset -# define png_sprintf wsprintfA -# else -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strcpy strcpy -# define png_strncpy strncpy /* Added to v 1.2.6 */ -# define png_strlen strlen -# define png_memcmp memcmp /* SJT: added */ -# define png_memcpy memcpy -# define png_memset memset -# define png_sprintf sprintf -# endif -#endif - -#ifndef PNG_NO_SNPRINTF -# ifdef _MSC_VER -# define png_snprintf _snprintf /* Added to v 1.2.19 */ -# define png_snprintf2 _snprintf -# define png_snprintf6 _snprintf -# else -# define png_snprintf snprintf /* Added to v 1.2.19 */ -# define png_snprintf2 snprintf -# define png_snprintf6 snprintf -# endif -#else - /* You don't have or don't want to use snprintf(). Caution: Using - * sprintf instead of snprintf exposes your application to accidental - * or malevolent buffer overflows. If you don't have snprintf() - * as a general rule you should provide one (you can get one from - * Portable OpenSSH). - */ -# define png_snprintf(s1,n,fmt,x1) png_sprintf(s1,fmt,x1) -# define png_snprintf2(s1,n,fmt,x1,x2) png_sprintf(s1,fmt,x1,x2) -# define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \ - png_sprintf(s1,fmt,x1,x2,x3,x4,x5,x6) -#endif - /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32 * to png_alloc_size_t are not necessary; in fact, it is recommended @@ -1527,18 +596,5 @@ typedef char FAR * FAR * FAR * png_charppp; # endif # endif #endif -/* End of memory model/platform independent support */ - -/* Just a little check that someone hasn't tried to define something - * contradictory. - */ -#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K) -# undef PNG_ZBUF_SIZE -# define PNG_ZBUF_SIZE 65536L -#endif - - -/* Added at libpng-1.2.8 */ -#endif /* PNG_VERSION_INFO_ONLY */ #endif /* PNGCONF_H */ diff --git a/src/png/pngdebug.h b/src/png/pngdebug.h new file mode 100644 index 0000000000..16f81fdd14 --- /dev/null +++ b/src/png/pngdebug.h @@ -0,0 +1,157 @@ + +/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c + * + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * Last changed in libpng 1.5.0 [January 6, 2011] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +/* Define PNG_DEBUG at compile time for debugging information. Higher + * numbers for PNG_DEBUG mean more debugging information. This has + * only been added since version 0.95 so it is not implemented throughout + * libpng yet, but more support will be added as needed. + * + * png_debug[1-2]?(level, message ,arg{0-2}) + * Expands to a statement (either a simple expression or a compound + * do..while(0) statement) that outputs a message with parameter + * substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG + * is undefined, 0 or 1 every png_debug expands to a simple expression + * (actually ((void)0)). + * + * level: level of detail of message, starting at 0. A level 'n' + * message is preceded by 'n' tab characters (not implemented + * on Microsoft compilers unless PNG_DEBUG_FILE is also + * defined, to allow debug DLL compilation with no standard IO). + * message: a printf(3) style text string. A trailing '\n' is added + * to the message. + * arg: 0 to 2 arguments for printf(3) style substitution in message. + */ +#ifndef PNGDEBUG_H +#define PNGDEBUG_H +/* These settings control the formatting of messages in png.c and pngerror.c */ +/* Moved to pngdebug.h at 1.5.0 */ +# ifndef PNG_LITERAL_SHARP +# define PNG_LITERAL_SHARP 0x23 +# endif +# ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET +# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b +# endif +# ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET +# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d +# endif +# ifndef PNG_STRING_NEWLINE +# define PNG_STRING_NEWLINE "\n" +# endif + +#ifdef PNG_DEBUG +# if (PNG_DEBUG > 0) +# if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER) +# include +# if (PNG_DEBUG > 1) +# ifndef _DEBUG +# define _DEBUG +# endif +# ifndef png_debug +# define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE) +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1) +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2) +# endif +# endif +# else /* PNG_DEBUG_FILE || !_MSC_VER */ +# ifndef PNG_STDIO_SUPPORTED +# include /* not included yet */ +# endif +# ifndef PNG_DEBUG_FILE +# define PNG_DEBUG_FILE stderr +# endif /* PNG_DEBUG_FILE */ + +# if (PNG_DEBUG > 1) +/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on + * non-ISO compilers + */ +# ifdef __STDC__ +# ifndef png_debug +# define png_debug(l,m) \ + do { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ + } while (0) +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) \ + do { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ + } while (0) +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + do { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ + } while (0) +# endif +# else /* __STDC __ */ +# ifndef png_debug +# define png_debug(l,m) \ + do { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format); \ + } while (0) +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) \ + do { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format,p1); \ + } while (0) +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + do { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format,p1,p2); \ + } while (0) +# endif +# endif /* __STDC __ */ +# endif /* (PNG_DEBUG > 1) */ + +# endif /* _MSC_VER */ +# endif /* (PNG_DEBUG > 0) */ +#endif /* PNG_DEBUG */ +#ifndef png_debug +# define png_debug(l, m) ((void)0) +#endif +#ifndef png_debug1 +# define png_debug1(l, m, p1) ((void)0) +#endif +#ifndef png_debug2 +# define png_debug2(l, m, p1, p2) ((void)0) +#endif +#endif /* PNGDEBUG_H */ diff --git a/src/png/pngerror.c b/src/png/pngerror.c index 633eae29f9..1ed9f8a2af 100644 --- a/src/png/pngerror.c +++ b/src/png/pngerror.c @@ -1,8 +1,8 @@ /* pngerror.c - stub functions for i/o and memory allocation * - * Last changed in libpng 1.4.0 [January 3, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -16,18 +16,17 @@ * at each function. */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #include "pngpriv.h" -static void /* PRIVATE */ -png_default_error PNGARG((png_structp png_ptr, - png_const_charp error_message)) PNG_NORETURN; +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + +static PNG_FUNCTION(void, png_default_error,PNGARG((png_structp png_ptr, + png_const_charp error_message)),PNG_NORETURN); + #ifdef PNG_WARNINGS_SUPPORTED static void /* PRIVATE */ png_default_warning PNGARG((png_structp png_ptr, - png_const_charp warning_message)); + png_const_charp warning_message)); #endif /* PNG_WARNINGS_SUPPORTED */ /* This function is called whenever there is a fatal error. This function @@ -36,42 +35,45 @@ png_default_warning PNGARG((png_structp png_ptr, * to replace the error function at run-time. */ #ifdef PNG_ERROR_TEXT_SUPPORTED -void PNGAPI -png_error(png_structp png_ptr, png_const_charp error_message) +PNG_FUNCTION(void,PNGAPI +png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) { #ifdef PNG_ERROR_NUMBERS_SUPPORTED char msg[16]; if (png_ptr != NULL) { - if (png_ptr->flags& - (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) - { - if (*error_message == PNG_LITERAL_SHARP) - { - /* Strip "#nnnn " from beginning of error message. */ - int offset; - for (offset = 1; offset<15; offset++) - if (error_message[offset] == ' ') + if (png_ptr->flags& + (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) + { + if (*error_message == PNG_LITERAL_SHARP) + { + /* Strip "#nnnn " from beginning of error message. */ + int offset; + for (offset = 1; offset<15; offset++) + if (error_message[offset] == ' ') break; - if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) - { - int i; - for (i = 0; i < offset - 1; i++) - msg[i] = error_message[i + 1]; - msg[i - 1] = '\0'; - error_message = msg; - } - else - error_message += offset; - } - else - { - if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) - { - msg[0] = '0'; - msg[1] = '\0'; - error_message = msg; - } + + if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) + { + int i; + for (i = 0; i < offset - 1; i++) + msg[i] = error_message[i + 1]; + msg[i - 1] = '\0'; + error_message = msg; + } + + else + error_message += offset; + } + + else + { + if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) + { + msg[0] = '0'; + msg[1] = '\0'; + error_message = msg; + } } } } @@ -84,18 +86,124 @@ png_error(png_structp png_ptr, png_const_charp error_message) png_default_error(png_ptr, error_message); } #else -void PNGAPI -png_err(png_structp png_ptr) +PNG_FUNCTION(void,PNGAPI +png_err,(png_structp png_ptr),PNG_NORETURN) { + /* Prior to 1.5.2 the error_fn received a NULL pointer, expressed + * erroneously as '\0', instead of the empty string "". This was + * apparently an error, introduced in libpng-1.2.20, and png_default_error + * will crash in this case. + */ if (png_ptr != NULL && png_ptr->error_fn != NULL) - (*(png_ptr->error_fn))(png_ptr, '\0'); + (*(png_ptr->error_fn))(png_ptr, ""); /* If the custom handler doesn't exist, or if it returns, use the default handler, which will not return. */ - png_default_error(png_ptr, '\0'); + png_default_error(png_ptr, ""); } #endif /* PNG_ERROR_TEXT_SUPPORTED */ +/* Utility to safely appends strings to a buffer. This never errors out so + * error checking is not required in the caller. + */ +size_t +png_safecat(png_charp buffer, size_t bufsize, size_t pos, + png_const_charp string) +{ + if (buffer != NULL && pos < bufsize) + { + if (string != NULL) + while (*string != '\0' && pos < bufsize-1) + buffer[pos++] = *string++; + + buffer[pos] = '\0'; + } + + return pos; +} + +#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED) +/* Utility to dump an unsigned value into a buffer, given a start pointer and + * and end pointer (which should point just *beyond* the end of the buffer!) + * Returns the pointer to the start of the formatted string. + */ +png_charp +png_format_number(png_const_charp start, png_charp end, int format, + png_alloc_size_t number) +{ + int count = 0; /* number of digits output */ + int mincount = 1; /* minimum number required */ + int output = 0; /* digit output (for the fixed point format) */ + + *--end = '\0'; + + /* This is written so that the loop always runs at least once, even with + * number zero. + */ + while (end > start && (number != 0 || count < mincount)) + { + + static const char digits[] = "0123456789ABCDEF"; + + switch (format) + { + case PNG_NUMBER_FORMAT_fixed: + /* Needs five digits (the fraction) */ + mincount = 5; + if (output || number % 10 != 0) + { + *--end = digits[number % 10]; + output = 1; + } + number /= 10; + break; + + case PNG_NUMBER_FORMAT_02u: + /* Expects at least 2 digits. */ + mincount = 2; + /* fall through */ + + case PNG_NUMBER_FORMAT_u: + *--end = digits[number % 10]; + number /= 10; + break; + + case PNG_NUMBER_FORMAT_02x: + /* This format expects at least two digits */ + mincount = 2; + /* fall through */ + + case PNG_NUMBER_FORMAT_x: + *--end = digits[number & 0xf]; + number >>= 4; + break; + + default: /* an error */ + number = 0; + break; + } + + /* Keep track of the number of digits added */ + ++count; + + /* Float a fixed number here: */ + if (format == PNG_NUMBER_FORMAT_fixed) if (count == 5) if (end > start) + { + /* End of the fraction, but maybe nothing was output? In that case + * drop the decimal point. If the number is a true zero handle that + * here. + */ + if (output) + *--end = '.'; + else if (number == 0) /* and !output */ + *--end = '0'; + } + } + + return end; +} +#endif + #ifdef PNG_WARNINGS_SUPPORTED /* This function is called whenever there is a non-fatal error. This function * should not be changed. If there is a need to handle warnings differently, @@ -110,22 +218,131 @@ png_warning(png_structp png_ptr, png_const_charp warning_message) { #ifdef PNG_ERROR_NUMBERS_SUPPORTED if (png_ptr->flags& - (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) + (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) #endif - { - if (*warning_message == PNG_LITERAL_SHARP) - { - for (offset = 1; offset < 15; offset++) - if (warning_message[offset] == ' ') + { + if (*warning_message == PNG_LITERAL_SHARP) + { + for (offset = 1; offset < 15; offset++) + if (warning_message[offset] == ' ') break; - } - } + } + } } if (png_ptr != NULL && png_ptr->warning_fn != NULL) (*(png_ptr->warning_fn))(png_ptr, warning_message + offset); else png_default_warning(png_ptr, warning_message + offset); } + +/* These functions support 'formatted' warning messages with up to + * PNG_WARNING_PARAMETER_COUNT parameters. In the format string the parameter + * is introduced by @, where 'number' starts at 1. This follows the + * standard established by X/Open for internationalizable error messages. + */ +void +png_warning_parameter(png_warning_parameters p, int number, + png_const_charp string) +{ + if (number > 0 && number <= PNG_WARNING_PARAMETER_COUNT) + (void)png_safecat(p[number-1], (sizeof p[number-1]), 0, string); +} + +void +png_warning_parameter_unsigned(png_warning_parameters p, int number, int format, + png_alloc_size_t value) +{ + char buffer[PNG_NUMBER_BUFFER_SIZE]; + png_warning_parameter(p, number, PNG_FORMAT_NUMBER(buffer, format, value)); +} + +void +png_warning_parameter_signed(png_warning_parameters p, int number, int format, + png_int_32 value) +{ + png_alloc_size_t u; + png_charp str; + char buffer[PNG_NUMBER_BUFFER_SIZE]; + + /* Avoid overflow by doing the negate in a png_alloc_size_t: */ + u = (png_alloc_size_t)value; + if (value < 0) + u = ~u + 1; + + str = PNG_FORMAT_NUMBER(buffer, format, u); + + if (value < 0 && str > buffer) + *--str = '-'; + + png_warning_parameter(p, number, str); +} + +void +png_formatted_warning(png_structp png_ptr, png_warning_parameters p, + png_const_charp message) +{ + /* The internal buffer is just 128 bytes - enough for all our messages, + * overflow doesn't happen because this code checks! + */ + size_t i; + char msg[128]; + + for (i=0; i<(sizeof msg)-1 && *message != '\0'; ++i) + { + if (*message == '@') + { + int parameter = -1; + switch (*++message) + { + case '1': + parameter = 0; + break; + + case '2': + parameter = 1; + break; + + case '\0': + continue; /* To break out of the for loop above. */ + + default: + break; + } + + if (parameter >= 0 && parameter < PNG_WARNING_PARAMETER_COUNT) + { + /* Append this parameter */ + png_const_charp parm = p[parameter]; + png_const_charp pend = p[parameter] + (sizeof p[parameter]); + + /* No need to copy the trailing '\0' here, but there is no guarantee + * that parm[] has been initialized, so there is no guarantee of a + * trailing '\0': + */ + for (; i<(sizeof msg)-1 && parm != '\0' && parm < pend; ++i) + msg[i] = *parm++; + + ++message; + continue; + } + + /* else not a parameter and there is a character after the @ sign; just + * copy that. + */ + } + + /* At this point *message can't be '\0', even in the bad parameter case + * above where there is a lone '@' at the end of the message string. + */ + msg[i] = *message++; + } + + /* i is always less than (sizeof msg), so: */ + msg[i] = '\0'; + + /* And this is the formatted message: */ + png_warning(png_ptr, msg); +} #endif /* PNG_WARNINGS_SUPPORTED */ #ifdef PNG_BENIGN_ERRORS_SUPPORTED @@ -133,9 +350,9 @@ void PNGAPI png_benign_error(png_structp png_ptr, png_const_charp error_message) { if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) - png_warning(png_ptr, error_message); + png_warning(png_ptr, error_message); else - png_error(png_ptr, error_message); + png_error(png_ptr, error_message); } #endif @@ -155,13 +372,16 @@ static PNG_CONST char png_digit[16] = { #if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED) static void /* PRIVATE */ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp - error_message) + error_message) { - int iout = 0, iin = 0; + png_uint_32 chunk_name = png_ptr->chunk_name; + int iout = 0, ishift = 24; - while (iin < 4) + while (ishift >= 0) { - int c = png_ptr->chunk_name[iin++]; + int c = (int)(chunk_name >> ishift) & 0xff; + + ishift -= 8; if (isnonalpha(c)) { buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET; @@ -169,38 +389,48 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp buffer[iout++] = png_digit[c & 0x0f]; buffer[iout++] = PNG_LITERAL_RIGHT_SQUARE_BRACKET; } + else { - buffer[iout++] = (png_byte)c; + buffer[iout++] = (char)c; } } if (error_message == NULL) buffer[iout] = '\0'; + else { + int iin = 0; + buffer[iout++] = ':'; buffer[iout++] = ' '; - png_memcpy(buffer + iout, error_message, PNG_MAX_ERROR_TEXT); - buffer[iout + PNG_MAX_ERROR_TEXT - 1] = '\0'; + + while (iin < PNG_MAX_ERROR_TEXT-1 && error_message[iin] != '\0') + buffer[iout++] = error_message[iin++]; + + /* iin < PNG_MAX_ERROR_TEXT, so the following is safe: */ + buffer[iout] = '\0'; } } +#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */ -#ifdef PNG_READ_SUPPORTED -void PNGAPI -png_chunk_error(png_structp png_ptr, png_const_charp error_message) +#if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) +PNG_FUNCTION(void,PNGAPI +png_chunk_error,(png_structp png_ptr, png_const_charp error_message), + PNG_NORETURN) { char msg[18+PNG_MAX_ERROR_TEXT]; if (png_ptr == NULL) - png_error(png_ptr, error_message); + png_error(png_ptr, error_message); + else { - png_format_buffer(png_ptr, msg, error_message); - png_error(png_ptr, msg); + png_format_buffer(png_ptr, msg, error_message); + png_error(png_ptr, msg); } } -#endif /* PNG_READ_SUPPORTED */ -#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */ +#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */ #ifdef PNG_WARNINGS_SUPPORTED void PNGAPI @@ -208,11 +438,12 @@ png_chunk_warning(png_structp png_ptr, png_const_charp warning_message) { char msg[18+PNG_MAX_ERROR_TEXT]; if (png_ptr == NULL) - png_warning(png_ptr, warning_message); + png_warning(png_ptr, warning_message); + else { - png_format_buffer(png_ptr, msg, warning_message); - png_warning(png_ptr, msg); + png_format_buffer(png_ptr, msg, warning_message); + png_warning(png_ptr, msg); } } #endif /* PNG_WARNINGS_SUPPORTED */ @@ -222,14 +453,37 @@ png_chunk_warning(png_structp png_ptr, png_const_charp warning_message) void PNGAPI png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message) { - if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) - png_chunk_warning(png_ptr, error_message); - else - png_chunk_error(png_ptr, error_message); + if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) + png_chunk_warning(png_ptr, error_message); + + else + png_chunk_error(png_ptr, error_message); } #endif #endif /* PNG_READ_SUPPORTED */ +#ifdef PNG_ERROR_TEXT_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +PNG_FUNCTION(void, +png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN) +{ +# define fixed_message "fixed point overflow in " +# define fixed_message_ln ((sizeof fixed_message)-1) + int iin; + char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT]; + png_memcpy(msg, fixed_message, fixed_message_ln); + iin = 0; + if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0) + { + msg[fixed_message_ln + iin] = name[iin]; + ++iin; + } + msg[fixed_message_ln + iin] = 0; + png_error(png_ptr, msg); +} +#endif +#endif + #ifdef PNG_SETJMP_SUPPORTED /* This API only exists if ANSI-C style error handling is used, * otherwise it is necessary for png_default_error to be overridden. @@ -242,7 +496,7 @@ png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn, return NULL; png_ptr->longjmp_fn = longjmp_fn; - return &png_ptr->jmpbuf; + return &png_ptr->longjmp_buffer; } #endif @@ -251,63 +505,73 @@ png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn, * function is used by default, or if the program supplies NULL for the * error function pointer in png_set_error_fn(). */ -static void /* PRIVATE */ -png_default_error(png_structp png_ptr, png_const_charp error_message) +static PNG_FUNCTION(void /* PRIVATE */, +png_default_error,(png_structp png_ptr, png_const_charp error_message), + PNG_NORETURN) { #ifdef PNG_CONSOLE_IO_SUPPORTED #ifdef PNG_ERROR_NUMBERS_SUPPORTED - if (*error_message == PNG_LITERAL_SHARP) + /* Check on NULL only added in 1.5.4 */ + if (error_message != NULL && *error_message == PNG_LITERAL_SHARP) { - /* Strip "#nnnn " from beginning of error message. */ - int offset; - char error_number[16]; - for (offset = 0; offset<15; offset++) - { + /* Strip "#nnnn " from beginning of error message. */ + int offset; + char error_number[16]; + for (offset = 0; offset<15; offset++) + { error_number[offset] = error_message[offset + 1]; if (error_message[offset] == ' ') - break; - } - if ((offset > 1) && (offset < 15)) - { - error_number[offset - 1] = '\0'; - fprintf(stderr, "libpng error no. %s: %s", - error_number, error_message + offset + 1); - fprintf(stderr, PNG_STRING_NEWLINE); - } - else - { - fprintf(stderr, "libpng error: %s, offset=%d", - error_message, offset); - fprintf(stderr, PNG_STRING_NEWLINE); - } + break; + } + + if ((offset > 1) && (offset < 15)) + { + error_number[offset - 1] = '\0'; + fprintf(stderr, "libpng error no. %s: %s", + error_number, error_message + offset + 1); + fprintf(stderr, PNG_STRING_NEWLINE); + } + + else + { + fprintf(stderr, "libpng error: %s, offset=%d", + error_message, offset); + fprintf(stderr, PNG_STRING_NEWLINE); + } } else #endif { - fprintf(stderr, "libpng error: %s", error_message); + fprintf(stderr, "libpng error: %s", error_message ? error_message : + "undefined"); fprintf(stderr, PNG_STRING_NEWLINE); } +#else + PNG_UNUSED(error_message) /* Make compiler happy */ #endif + png_longjmp(png_ptr, 1); +} +PNG_FUNCTION(void,PNGAPI +png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN) +{ #ifdef PNG_SETJMP_SUPPORTED if (png_ptr && png_ptr->longjmp_fn) { # ifdef USE_FAR_KEYWORD - { - jmp_buf jmpbuf; - png_memcpy(jmpbuf, png_ptr->jmpbuf, png_sizeof(jmp_buf)); - png_ptr->longjmp_fn(jmpbuf, 1); - } + { + jmp_buf tmp_jmpbuf; + png_memcpy(tmp_jmpbuf, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); + png_ptr->longjmp_fn(tmp_jmpbuf, val); + } + # else - png_ptr->longjmp_fn(png_ptr->jmpbuf, 1); + png_ptr->longjmp_fn(png_ptr->longjmp_buffer, val); # endif } #endif /* Here if not setjmp support or if png_ptr is null. */ PNG_ABORT(); -#ifndef PNG_CONSOLE_IO_SUPPORTED - error_message = error_message; /* Make compiler happy */ -#endif } #ifdef PNG_WARNINGS_SUPPORTED @@ -323,55 +587,63 @@ png_default_warning(png_structp png_ptr, png_const_charp warning_message) # ifdef PNG_ERROR_NUMBERS_SUPPORTED if (*warning_message == PNG_LITERAL_SHARP) { - int offset; - char warning_number[16]; - for (offset = 0; offset < 15; offset++) - { - warning_number[offset] = warning_message[offset + 1]; - if (warning_message[offset] == ' ') + int offset; + char warning_number[16]; + for (offset = 0; offset < 15; offset++) + { + warning_number[offset] = warning_message[offset + 1]; + if (warning_message[offset] == ' ') break; - } - if ((offset > 1) && (offset < 15)) - { - warning_number[offset + 1] = '\0'; - fprintf(stderr, "libpng warning no. %s: %s", - warning_number, warning_message + offset); - fprintf(stderr, PNG_STRING_NEWLINE); - } - else - { - fprintf(stderr, "libpng warning: %s", - warning_message); - fprintf(stderr, PNG_STRING_NEWLINE); - } + } + + if ((offset > 1) && (offset < 15)) + { + warning_number[offset + 1] = '\0'; + fprintf(stderr, "libpng warning no. %s: %s", + warning_number, warning_message + offset); + fprintf(stderr, PNG_STRING_NEWLINE); + } + + else + { + fprintf(stderr, "libpng warning: %s", + warning_message); + fprintf(stderr, PNG_STRING_NEWLINE); + } } else # endif + { - fprintf(stderr, "libpng warning: %s", warning_message); - fprintf(stderr, PNG_STRING_NEWLINE); + fprintf(stderr, "libpng warning: %s", warning_message); + fprintf(stderr, PNG_STRING_NEWLINE); } #else - warning_message = warning_message; /* Make compiler happy */ + PNG_UNUSED(warning_message) /* Make compiler happy */ #endif - png_ptr = png_ptr; /* Make compiler happy */ + PNG_UNUSED(png_ptr) /* Make compiler happy */ } #endif /* PNG_WARNINGS_SUPPORTED */ /* This function is called when the application wants to use another method * of handling errors and warnings. Note that the error function MUST NOT * return to the calling routine or serious problems will occur. The return - * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1) + * method used in the default routine calls longjmp(png_ptr->longjmp_buffer, 1) */ void PNGAPI png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warning_fn) + png_error_ptr error_fn, png_error_ptr warning_fn) { if (png_ptr == NULL) return; + png_ptr->error_ptr = error_ptr; png_ptr->error_fn = error_fn; +#ifdef PNG_WARNINGS_SUPPORTED png_ptr->warning_fn = warning_fn; +#else + PNG_UNUSED(warning_fn) +#endif } @@ -380,10 +652,11 @@ png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, * pointer before png_write_destroy and png_read_destroy are called. */ png_voidp PNGAPI -png_get_error_ptr(png_structp png_ptr) +png_get_error_ptr(png_const_structp png_ptr) { if (png_ptr == NULL) return NULL; + return ((png_voidp)png_ptr->error_ptr); } @@ -394,8 +667,9 @@ png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode) { if (png_ptr != NULL) { - png_ptr->flags &= - ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode); + png_ptr->flags &= + ((~(PNG_FLAG_STRIP_ERROR_NUMBERS | + PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode); } } #endif diff --git a/src/png/pngget.c b/src/png/pngget.c index abe721bd58..9f05ecffd5 100644 --- a/src/png/pngget.c +++ b/src/png/pngget.c @@ -1,8 +1,8 @@ /* pngget.c - retrieval of values from info struct * - * Last changed in libpng 1.4.2 [May 6, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -12,47 +12,44 @@ * */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #include "pngpriv.h" +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + png_uint_32 PNGAPI -png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag) +png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 flag) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->valid & flag); - else - return(0); + return(0); } png_size_t PNGAPI -png_get_rowbytes(png_structp png_ptr, png_infop info_ptr) +png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->rowbytes); - else - return(0); + return(0); } #ifdef PNG_INFO_IMAGE_SUPPORTED png_bytepp PNGAPI -png_get_rows(png_structp png_ptr, png_infop info_ptr) +png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->row_pointers); - else - return(0); + return(0); } #endif #ifdef PNG_EASY_ACCESS_SUPPORTED /* Easy access to info, added in libpng-0.99 */ png_uint_32 PNGAPI -png_get_image_width(png_structp png_ptr, png_infop info_ptr) +png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->width; @@ -61,7 +58,7 @@ png_get_image_width(png_structp png_ptr, png_infop info_ptr) } png_uint_32 PNGAPI -png_get_image_height(png_structp png_ptr, png_infop info_ptr) +png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->height; @@ -70,7 +67,7 @@ png_get_image_height(png_structp png_ptr, png_infop info_ptr) } png_byte PNGAPI -png_get_bit_depth(png_structp png_ptr, png_infop info_ptr) +png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->bit_depth; @@ -79,7 +76,7 @@ png_get_bit_depth(png_structp png_ptr, png_infop info_ptr) } png_byte PNGAPI -png_get_color_type(png_structp png_ptr, png_infop info_ptr) +png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->color_type; @@ -88,7 +85,7 @@ png_get_color_type(png_structp png_ptr, png_infop info_ptr) } png_byte PNGAPI -png_get_filter_type(png_structp png_ptr, png_infop info_ptr) +png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->filter_type; @@ -97,7 +94,7 @@ png_get_filter_type(png_structp png_ptr, png_infop info_ptr) } png_byte PNGAPI -png_get_interlace_type(png_structp png_ptr, png_infop info_ptr) +png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->interlace_type; @@ -106,7 +103,7 @@ png_get_interlace_type(png_structp png_ptr, png_infop info_ptr) } png_byte PNGAPI -png_get_compression_type(png_structp png_ptr, png_infop info_ptr) +png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->compression_type; @@ -115,222 +112,275 @@ png_get_compression_type(png_structp png_ptr, png_infop info_ptr) } png_uint_32 PNGAPI -png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) +png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) { - if (png_ptr != NULL && info_ptr != NULL) #ifdef PNG_pHYs_SUPPORTED - if (info_ptr->valid & PNG_INFO_pHYs) - { - png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter"); - - if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER) - return (0); + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + { + png_debug1(1, "in %s retrieval function", + "png_get_x_pixels_per_meter"); - else - return (info_ptr->x_pixels_per_unit); - } -#else - return (0); + if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER) + return (info_ptr->x_pixels_per_unit); + } #endif + return (0); } png_uint_32 PNGAPI -png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) +png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) { - if (png_ptr != NULL && info_ptr != NULL) #ifdef PNG_pHYs_SUPPORTED - if (info_ptr->valid & PNG_INFO_pHYs) + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { - png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter"); - - if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER) - return (0); + png_debug1(1, "in %s retrieval function", + "png_get_y_pixels_per_meter"); - else - return (info_ptr->y_pixels_per_unit); + if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER) + return (info_ptr->y_pixels_per_unit); } -#else - return (0); #endif + return (0); } png_uint_32 PNGAPI -png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) +png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) { - if (png_ptr != NULL && info_ptr != NULL) #ifdef PNG_pHYs_SUPPORTED - if (info_ptr->valid & PNG_INFO_pHYs) + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter"); - if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER || - info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit) - return (0); - - else - return (info_ptr->x_pixels_per_unit); + if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER && + info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit) + return (info_ptr->x_pixels_per_unit); } -#else - return (0); #endif + return (0); } #ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr) - { - if (png_ptr != NULL && info_ptr != NULL) -#ifdef PNG_pHYs_SUPPORTED - - if (info_ptr->valid & PNG_INFO_pHYs) +png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_READ_pHYs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio"); - if (info_ptr->x_pixels_per_unit == 0) - return ((float)0.0); - - else + if (info_ptr->x_pixels_per_unit != 0) return ((float)((float)info_ptr->y_pixels_per_unit - /(float)info_ptr->x_pixels_per_unit)); + /(float)info_ptr->x_pixels_per_unit)); } -#else - return (0.0); #endif + return ((float)0.0); } #endif +#ifdef PNG_FIXED_POINT_SUPPORTED +png_fixed_point PNGAPI +png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr, + png_const_infop info_ptr) +{ +#ifdef PNG_READ_pHYs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs) + && info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0 + && info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX + && info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX) + { + png_fixed_point res; + + png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio_fixed"); + + /* The following casts work because a PNG 4 byte integer only has a valid + * range of 0..2^31-1; otherwise the cast might overflow. + */ + if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1, + (png_int_32)info_ptr->x_pixels_per_unit)) + return res; + } +#endif + + return 0; +} +#endif + png_int_32 PNGAPI -png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr) +png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) { - if (png_ptr != NULL && info_ptr != NULL) #ifdef PNG_oFFs_SUPPORTED - - if (info_ptr->valid & PNG_INFO_oFFs) + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns"); - if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) - return (0); - - else - return (info_ptr->x_offset); + if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER) + return (info_ptr->x_offset); } -#else - return (0); #endif + return (0); } png_int_32 PNGAPI -png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr) +png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) { - if (png_ptr != NULL && info_ptr != NULL) - #ifdef PNG_oFFs_SUPPORTED - if (info_ptr->valid & PNG_INFO_oFFs) + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns"); - if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) - return (0); - - else - return (info_ptr->y_offset); + if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER) + return (info_ptr->y_offset); } -#else - return (0); #endif + return (0); } png_int_32 PNGAPI -png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr) +png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) { - if (png_ptr != NULL && info_ptr != NULL) - #ifdef PNG_oFFs_SUPPORTED - if (info_ptr->valid & PNG_INFO_oFFs) + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { - png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns"); + png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels"); - if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) - return (0); - - else - return (info_ptr->x_offset); + if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL) + return (info_ptr->x_offset); } -#else - return (0); #endif + return (0); } png_int_32 PNGAPI -png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr) +png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) { - if (png_ptr != NULL && info_ptr != NULL) - #ifdef PNG_oFFs_SUPPORTED - if (info_ptr->valid & PNG_INFO_oFFs) + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { - png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns"); + png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels"); - if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) - return (0); - - else - return (info_ptr->y_offset); + if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL) + return (info_ptr->y_offset); } -#else - return (0); #endif + return (0); } -#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) +#ifdef PNG_INCH_CONVERSIONS_SUPPORTED +static png_uint_32 +ppi_from_ppm(png_uint_32 ppm) +{ +#if 0 + /* The conversion is *(2.54/100), in binary (32 digits): + * .00000110100000001001110101001001 + */ + png_uint_32 t1001, t1101; + ppm >>= 1; /* .1 */ + t1001 = ppm + (ppm >> 3); /* .1001 */ + t1101 = t1001 + (ppm >> 1); /* .1101 */ + ppm >>= 20; /* .000000000000000000001 */ + t1101 += t1101 >> 15; /* .1101000000000001101 */ + t1001 >>= 11; /* .000000000001001 */ + t1001 += t1001 >> 12; /* .000000000001001000000001001 */ + ppm += t1001; /* .000000000001001000001001001 */ + ppm += t1101; /* .110100000001001110101001001 */ + return (ppm + 16) >> 5;/* .00000110100000001001110101001001 */ +#else + /* The argument is a PNG unsigned integer, so it is not permitted + * to be bigger than 2^31. + */ + png_fixed_point result; + if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127, + 5000)) + return result; + + /* Overflow. */ + return 0; +#endif +} + png_uint_32 PNGAPI -png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) +png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) { - return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr) - *.0254 +.5)); + return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr)); } png_uint_32 PNGAPI -png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) +png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) { - return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr) - *.0254 +.5)); + return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr)); } png_uint_32 PNGAPI -png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) +png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +{ + return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr)); +} + +#ifdef PNG_FIXED_POINT_SUPPORTED +static png_fixed_point +png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns) { - return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr) - *.0254 +.5)); + /* Convert from metres * 1,000,000 to inches * 100,000, meters to + * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127. + * Notice that this can overflow - a warning is output and 0 is + * returned. + */ + return png_muldiv_warn(png_ptr, microns, 500, 127); } +png_fixed_point PNGAPI +png_get_x_offset_inches_fixed(png_structp png_ptr, + png_const_infop info_ptr) +{ + return png_fixed_inches_from_microns(png_ptr, + png_get_x_offset_microns(png_ptr, info_ptr)); +} +#endif + +#ifdef PNG_FIXED_POINT_SUPPORTED +png_fixed_point PNGAPI +png_get_y_offset_inches_fixed(png_structp png_ptr, + png_const_infop info_ptr) +{ + return png_fixed_inches_from_microns(png_ptr, + png_get_y_offset_microns(png_ptr, info_ptr)); +} +#endif + +#ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr) +png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) { - return ((float)png_get_x_offset_microns(png_ptr, info_ptr) - *.00003937); + /* To avoid the overflow do the conversion directly in floating + * point. + */ + return (float)(png_get_x_offset_microns(png_ptr, info_ptr) * .00003937); } +#endif +#ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr) +png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) { - return ((float)png_get_y_offset_microns(png_ptr, info_ptr) - *.00003937); + /* To avoid the overflow do the conversion directly in floating + * point. + */ + return (float)(png_get_y_offset_microns(png_ptr, info_ptr) * .00003937); } +#endif #ifdef PNG_pHYs_SUPPORTED png_uint_32 PNGAPI -png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) +png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) { png_uint_32 retval = 0; @@ -343,15 +393,18 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, *res_x = info_ptr->x_pixels_per_unit; retval |= PNG_INFO_pHYs; } + if (res_y != NULL) { *res_y = info_ptr->y_pixels_per_unit; retval |= PNG_INFO_pHYs; } + if (unit_type != NULL) { *unit_type = (int)info_ptr->phys_unit_type; retval |= PNG_INFO_pHYs; + if (*unit_type == 1) { if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50); @@ -359,176 +412,277 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, } } } + return (retval); } #endif /* PNG_pHYs_SUPPORTED */ -#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ +#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ /* png_get_channels really belongs in here, too, but it's been around longer */ #endif /* PNG_EASY_ACCESS_SUPPORTED */ png_byte PNGAPI -png_get_channels(png_structp png_ptr, png_infop info_ptr) +png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->channels); - else - return (0); + + return (0); } -png_bytep PNGAPI -png_get_signature(png_structp png_ptr, png_infop info_ptr) +png_const_bytep PNGAPI +png_get_signature(png_const_structp png_ptr, png_infop info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->signature); - else - return (NULL); + + return (NULL); } #ifdef PNG_bKGD_SUPPORTED png_uint_32 PNGAPI -png_get_bKGD(png_structp png_ptr, png_infop info_ptr, +png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr, png_color_16p *background) { if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) - && background != NULL) + && background != NULL) { png_debug1(1, "in %s retrieval function", "bKGD"); *background = &(info_ptr->background); return (PNG_INFO_bKGD); } + return (0); } #endif #ifdef PNG_cHRM_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED +/* The XYZ APIs were added in 1.5.5 to take advantage of the code added at the + * same time to correct the rgb grayscale coefficient defaults obtained from the + * cHRM chunk in 1.5.4 + */ +png_uint_32 PNGFAPI +png_get_cHRM_XYZ_fixed(png_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *int_red_X, png_fixed_point *int_red_Y, + png_fixed_point *int_red_Z, png_fixed_point *int_green_X, + png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, + png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, + png_fixed_point *int_blue_Z) +{ + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + { + png_xy xy; + png_XYZ XYZ; + + png_debug1(1, "in %s retrieval function", "cHRM_XYZ"); + + xy.whitex = info_ptr->x_white; + xy.whitey = info_ptr->y_white; + xy.redx = info_ptr->x_red; + xy.redy = info_ptr->y_red; + xy.greenx = info_ptr->x_green; + xy.greeny = info_ptr->y_green; + xy.bluex = info_ptr->x_blue; + xy.bluey = info_ptr->y_blue; + + /* The *_checked function handles error reporting, so just return 0 if + * there is a failure here. + */ + if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) + { + if (int_red_X != NULL) + *int_red_X = XYZ.redX; + if (int_red_Y != NULL) + *int_red_Y = XYZ.redY; + if (int_red_Z != NULL) + *int_red_Z = XYZ.redZ; + if (int_green_X != NULL) + *int_green_X = XYZ.greenX; + if (int_green_Y != NULL) + *int_green_Y = XYZ.greenY; + if (int_green_Z != NULL) + *int_green_Z = XYZ.greenZ; + if (int_blue_X != NULL) + *int_blue_X = XYZ.blueX; + if (int_blue_Y != NULL) + *int_blue_Y = XYZ.blueY; + if (int_blue_Z != NULL) + *int_blue_Z = XYZ.blueZ; + + return (PNG_INFO_cHRM); + } + } + + return (0); +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_cHRM(png_structp png_ptr, png_infop info_ptr, - double *white_x, double *white_y, double *red_x, double *red_y, - double *green_x, double *green_y, double *blue_x, double *blue_y) +png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr, + double *white_x, double *white_y, double *red_x, double *red_y, + double *green_x, double *green_y, double *blue_x, double *blue_y) { if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) { png_debug1(1, "in %s retrieval function", "cHRM"); if (white_x != NULL) - *white_x = (double)info_ptr->x_white; + *white_x = png_float(png_ptr, info_ptr->x_white, "cHRM white X"); if (white_y != NULL) - *white_y = (double)info_ptr->y_white; + *white_y = png_float(png_ptr, info_ptr->y_white, "cHRM white Y"); if (red_x != NULL) - *red_x = (double)info_ptr->x_red; + *red_x = png_float(png_ptr, info_ptr->x_red, "cHRM red X"); if (red_y != NULL) - *red_y = (double)info_ptr->y_red; + *red_y = png_float(png_ptr, info_ptr->y_red, "cHRM red Y"); if (green_x != NULL) - *green_x = (double)info_ptr->x_green; + *green_x = png_float(png_ptr, info_ptr->x_green, "cHRM green X"); if (green_y != NULL) - *green_y = (double)info_ptr->y_green; + *green_y = png_float(png_ptr, info_ptr->y_green, "cHRM green Y"); if (blue_x != NULL) - *blue_x = (double)info_ptr->x_blue; + *blue_x = png_float(png_ptr, info_ptr->x_blue, "cHRM blue X"); if (blue_y != NULL) - *blue_y = (double)info_ptr->y_blue; + *blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y"); return (PNG_INFO_cHRM); } + return (0); } -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED + +png_uint_32 PNGAPI +png_get_cHRM_XYZ(png_structp png_ptr, png_const_infop info_ptr, + double *red_X, double *red_Y, double *red_Z, double *green_X, + double *green_Y, double *green_Z, double *blue_X, double *blue_Y, + double *blue_Z) +{ + png_XYZ XYZ; + + if (png_get_cHRM_XYZ_fixed(png_ptr, info_ptr, + &XYZ.redX, &XYZ.redY, &XYZ.redZ, &XYZ.greenX, &XYZ.greenY, &XYZ.greenZ, + &XYZ.blueX, &XYZ.blueY, &XYZ.blueZ) & PNG_INFO_cHRM) + { + if (red_X != NULL) + *red_X = png_float(png_ptr, XYZ.redX, "cHRM red X"); + if (red_Y != NULL) + *red_Y = png_float(png_ptr, XYZ.redY, "cHRM red Y"); + if (red_Z != NULL) + *red_Z = png_float(png_ptr, XYZ.redZ, "cHRM red Z"); + if (green_X != NULL) + *green_X = png_float(png_ptr, XYZ.greenX, "cHRM green X"); + if (green_Y != NULL) + *green_Y = png_float(png_ptr, XYZ.greenY, "cHRM green Y"); + if (green_Z != NULL) + *green_Z = png_float(png_ptr, XYZ.greenZ, "cHRM green Z"); + if (blue_X != NULL) + *blue_X = png_float(png_ptr, XYZ.blueX, "cHRM blue X"); + if (blue_Y != NULL) + *blue_Y = png_float(png_ptr, XYZ.blueY, "cHRM blue Y"); + if (blue_Z != NULL) + *blue_Z = png_float(png_ptr, XYZ.blueZ, "cHRM blue Z"); + return (PNG_INFO_cHRM); + } + + return (0); +} +# endif + +# ifdef PNG_FIXED_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, - png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, - png_fixed_point *blue_x, png_fixed_point *blue_y) +png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, + png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, + png_fixed_point *blue_x, png_fixed_point *blue_y) { png_debug1(1, "in %s retrieval function", "cHRM"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) { if (white_x != NULL) - *white_x = info_ptr->int_x_white; + *white_x = info_ptr->x_white; if (white_y != NULL) - *white_y = info_ptr->int_y_white; + *white_y = info_ptr->y_white; if (red_x != NULL) - *red_x = info_ptr->int_x_red; + *red_x = info_ptr->x_red; if (red_y != NULL) - *red_y = info_ptr->int_y_red; + *red_y = info_ptr->y_red; if (green_x != NULL) - *green_x = info_ptr->int_x_green; + *green_x = info_ptr->x_green; if (green_y != NULL) - *green_y = info_ptr->int_y_green; + *green_y = info_ptr->y_green; if (blue_x != NULL) - *blue_x = info_ptr->int_x_blue; + *blue_x = info_ptr->x_blue; if (blue_y != NULL) - *blue_y = info_ptr->int_y_blue; + *blue_y = info_ptr->y_blue; return (PNG_INFO_cHRM); } + return (0); } -#endif +# endif #endif #ifdef PNG_gAMA_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -png_uint_32 PNGAPI -png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma) +png_uint_32 PNGFAPI +png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *file_gamma) { png_debug1(1, "in %s retrieval function", "gAMA"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) - && file_gamma != NULL) + && file_gamma != NULL) { - *file_gamma = (double)info_ptr->gamma; + *file_gamma = info_ptr->gamma; return (PNG_INFO_gAMA); } + return (0); } -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED +# ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point *int_file_gamma) +png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr, + double *file_gamma) { - png_debug1(1, "in %s retrieval function", "gAMA"); + png_fixed_point igamma; + png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) - && int_file_gamma != NULL) - { - *int_file_gamma = info_ptr->int_gamma; - return (PNG_INFO_gAMA); - } - return (0); + if (ok) + *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA"); + + return ok; } -#endif + +# endif #endif #ifdef PNG_sRGB_SUPPORTED png_uint_32 PNGAPI -png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent) +png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr, + int *file_srgb_intent) { png_debug1(1, "in %s retrieval function", "sRGB"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) - && file_srgb_intent != NULL) + && file_srgb_intent != NULL) { *file_srgb_intent = (int)info_ptr->srgb_intent; return (PNG_INFO_sRGB); } + return (0); } #endif #ifdef PNG_iCCP_SUPPORTED png_uint_32 PNGAPI -png_get_iCCP(png_structp png_ptr, png_infop info_ptr, - png_charpp name, int *compression_type, - png_charpp profile, png_uint_32 *proflen) +png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr, + png_charpp name, int *compression_type, + png_bytepp profile, png_uint_32 *proflen) { png_debug1(1, "in %s retrieval function", "iCCP"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP) - && name != NULL && profile != NULL && proflen != NULL) + && name != NULL && profile != NULL && proflen != NULL) { *name = info_ptr->iccp_name; *profile = info_ptr->iccp_profile; @@ -539,45 +693,49 @@ png_get_iCCP(png_structp png_ptr, png_infop info_ptr, *compression_type = (int)info_ptr->iccp_compression; return (PNG_INFO_iCCP); } + return (0); } #endif #ifdef PNG_sPLT_SUPPORTED png_uint_32 PNGAPI -png_get_sPLT(png_structp png_ptr, png_infop info_ptr, - png_sPLT_tpp spalettes) +png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr, + png_sPLT_tpp spalettes) { if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) { - *spalettes = info_ptr->splt_palettes; - return ((png_uint_32)info_ptr->splt_palettes_num); + *spalettes = info_ptr->splt_palettes; + return ((png_uint_32)info_ptr->splt_palettes_num); } + return (0); } #endif #ifdef PNG_hIST_SUPPORTED png_uint_32 PNGAPI -png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist) +png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_16p *hist) { png_debug1(1, "in %s retrieval function", "hIST"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) - && hist != NULL) + && hist != NULL) { *hist = info_ptr->hist; return (PNG_INFO_hIST); } + return (0); } #endif png_uint_32 PNGAPI png_get_IHDR(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *width, png_uint_32 *height, int *bit_depth, - int *color_type, int *interlace_type, int *compression_type, - int *filter_type) + png_uint_32 *width, png_uint_32 *height, int *bit_depth, + int *color_type, int *interlace_type, int *compression_type, + int *filter_type) { png_debug1(1, "in %s retrieval function", "IHDR"); @@ -614,28 +772,29 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_oFFs_SUPPORTED png_uint_32 PNGAPI -png_get_oFFs(png_structp png_ptr, png_infop info_ptr, - png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) +png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr, + png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) { png_debug1(1, "in %s retrieval function", "oFFs"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) - && offset_x != NULL && offset_y != NULL && unit_type != NULL) + && offset_x != NULL && offset_y != NULL && unit_type != NULL) { *offset_x = info_ptr->x_offset; *offset_y = info_ptr->y_offset; *unit_type = (int)info_ptr->offset_unit_type; return (PNG_INFO_oFFs); } + return (0); } #endif #ifdef PNG_pCAL_SUPPORTED png_uint_32 PNGAPI -png_get_pCAL(png_structp png_ptr, png_infop info_ptr, - png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, - png_charp *units, png_charpp *params) +png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr, + png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, + png_charp *units, png_charpp *params) { png_debug1(1, "in %s retrieval function", "pCAL"); @@ -652,57 +811,78 @@ png_get_pCAL(png_structp png_ptr, png_infop info_ptr, *params = info_ptr->pcal_params; return (PNG_INFO_pCAL); } + return (0); } #endif #ifdef PNG_sCAL_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED +# ifdef PNG_FIXED_POINT_SUPPORTED +# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED png_uint_32 PNGAPI -png_get_sCAL(png_structp png_ptr, png_infop info_ptr, - int *unit, double *width, double *height) +png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr, + int *unit, png_fixed_point *width, png_fixed_point *height) { - if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_sCAL)) - { - *unit = info_ptr->scal_unit; - *width = info_ptr->scal_pixel_width; - *height = info_ptr->scal_pixel_height; - return (PNG_INFO_sCAL); - } - return(0); + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_sCAL)) + { + *unit = info_ptr->scal_unit; + /*TODO: make this work without FP support */ + *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width"); + *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height), + "sCAL height"); + return (PNG_INFO_sCAL); + } + + return(0); } -#else -#ifdef PNG_FIXED_POINT_SUPPORTED +# endif /* FLOATING_ARITHMETIC */ +# endif /* FIXED_POINT */ +# ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr, - int *unit, png_charpp width, png_charpp height) +png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr, + int *unit, double *width, double *height) { - if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_sCAL)) - { - *unit = info_ptr->scal_unit; - *width = info_ptr->scal_s_width; - *height = info_ptr->scal_s_height; - return (PNG_INFO_sCAL); - } - return(0); + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_sCAL)) + { + *unit = info_ptr->scal_unit; + *width = atof(info_ptr->scal_s_width); + *height = atof(info_ptr->scal_s_height); + return (PNG_INFO_sCAL); + } + + return(0); } -#endif -#endif -#endif +# endif /* FLOATING POINT */ +png_uint_32 PNGAPI +png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr, + int *unit, png_charpp width, png_charpp height) +{ + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_sCAL)) + { + *unit = info_ptr->scal_unit; + *width = info_ptr->scal_s_width; + *height = info_ptr->scal_s_height; + return (PNG_INFO_sCAL); + } + + return(0); +} +#endif /* sCAL */ #ifdef PNG_pHYs_SUPPORTED png_uint_32 PNGAPI -png_get_pHYs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) +png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) { png_uint_32 retval = 0; png_debug1(1, "in %s retrieval function", "pHYs"); if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_pHYs)) + (info_ptr->valid & PNG_INFO_pHYs)) { if (res_x != NULL) { @@ -722,13 +902,14 @@ png_get_pHYs(png_structp png_ptr, png_infop info_ptr, retval |= PNG_INFO_pHYs; } } + return (retval); } -#endif +#endif /* pHYs */ png_uint_32 PNGAPI -png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette, - int *num_palette) +png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr, + png_colorp *palette, int *num_palette) { png_debug1(1, "in %s retrieval function", "PLTE"); @@ -740,35 +921,37 @@ png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette, png_debug1(3, "num_palette = %d", *num_palette); return (PNG_INFO_PLTE); } + return (0); } #ifdef PNG_sBIT_SUPPORTED png_uint_32 PNGAPI -png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit) +png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr, + png_color_8p *sig_bit) { png_debug1(1, "in %s retrieval function", "sBIT"); if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT) - && sig_bit != NULL) + && sig_bit != NULL) { *sig_bit = &(info_ptr->sig_bit); return (PNG_INFO_sBIT); } + return (0); } #endif #ifdef PNG_TEXT_SUPPORTED png_uint_32 PNGAPI -png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, - int *num_text) +png_get_text(png_const_structp png_ptr, png_const_infop info_ptr, + png_textp *text_ptr, int *num_text) { if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) { - png_debug1(1, "in %s retrieval function", - (png_ptr->chunk_name[0] == '\0' ? "text" - : (png_const_charp)png_ptr->chunk_name)); + png_debug1(1, "in 0x%lx retrieval function", + (unsigned long)png_ptr->chunk_name); if (text_ptr != NULL) *text_ptr = info_ptr->text; @@ -778,15 +961,17 @@ png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, return ((png_uint_32)info_ptr->num_text); } + if (num_text != NULL) - *num_text = 0; + *num_text = 0; + return(0); } #endif #ifdef PNG_tIME_SUPPORTED png_uint_32 PNGAPI -png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time) +png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time) { png_debug1(1, "in %s retrieval function", "tIME"); @@ -796,14 +981,15 @@ png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time) *mod_time = &(info_ptr->mod_time); return (PNG_INFO_tIME); } + return (0); } #endif #ifdef PNG_tRNS_SUPPORTED png_uint_32 PNGAPI -png_get_tRNS(png_structp png_ptr, png_infop info_ptr, - png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color) +png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr, + png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color) { png_uint_32 retval = 0; if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) @@ -812,98 +998,103 @@ png_get_tRNS(png_structp png_ptr, png_infop info_ptr, if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { - if (trans_alpha != NULL) - { - *trans_alpha = info_ptr->trans_alpha; - retval |= PNG_INFO_tRNS; - } - - if (trans_color != NULL) - *trans_color = &(info_ptr->trans_color); + if (trans_alpha != NULL) + { + *trans_alpha = info_ptr->trans_alpha; + retval |= PNG_INFO_tRNS; + } + + if (trans_color != NULL) + *trans_color = &(info_ptr->trans_color); } + else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ { - if (trans_color != NULL) - { - *trans_color = &(info_ptr->trans_color); - retval |= PNG_INFO_tRNS; - } - - if (trans_alpha != NULL) - *trans_alpha = NULL; + if (trans_color != NULL) + { + *trans_color = &(info_ptr->trans_color); + retval |= PNG_INFO_tRNS; + } + + if (trans_alpha != NULL) + *trans_alpha = NULL; } + if (num_trans != NULL) { *num_trans = info_ptr->num_trans; retval |= PNG_INFO_tRNS; } } + return (retval); } #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -png_uint_32 PNGAPI -png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, - png_unknown_chunkpp unknowns) +int PNGAPI +png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr, + png_unknown_chunkpp unknowns) { if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) { - *unknowns = info_ptr->unknown_chunks; - return ((png_uint_32)info_ptr->unknown_chunks_num); + *unknowns = info_ptr->unknown_chunks; + return info_ptr->unknown_chunks_num; } + return (0); } #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED png_byte PNGAPI -png_get_rgb_to_gray_status (png_structp png_ptr) +png_get_rgb_to_gray_status (png_const_structp png_ptr) { - return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0); + return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0); } #endif #ifdef PNG_USER_CHUNKS_SUPPORTED png_voidp PNGAPI -png_get_user_chunk_ptr(png_structp png_ptr) +png_get_user_chunk_ptr(png_const_structp png_ptr) { - return (png_ptr? png_ptr->user_chunk_ptr : NULL); + return (png_ptr ? png_ptr->user_chunk_ptr : NULL); } #endif png_size_t PNGAPI -png_get_compression_buffer_size(png_structp png_ptr) +png_get_compression_buffer_size(png_const_structp png_ptr) { - return (png_ptr ? png_ptr->zbuf_size : 0L); + return (png_ptr ? png_ptr->zbuf_size : 0); } - #ifdef PNG_SET_USER_LIMITS_SUPPORTED /* These functions were added to libpng 1.2.6 and were enabled * by default in libpng-1.4.0 */ png_uint_32 PNGAPI -png_get_user_width_max (png_structp png_ptr) +png_get_user_width_max (png_const_structp png_ptr) { - return (png_ptr? png_ptr->user_width_max : 0); + return (png_ptr ? png_ptr->user_width_max : 0); } + png_uint_32 PNGAPI -png_get_user_height_max (png_structp png_ptr) +png_get_user_height_max (png_const_structp png_ptr) { - return (png_ptr? png_ptr->user_height_max : 0); + return (png_ptr ? png_ptr->user_height_max : 0); } + /* This function was added to libpng 1.4.0 */ png_uint_32 PNGAPI -png_get_chunk_cache_max (png_structp png_ptr) +png_get_chunk_cache_max (png_const_structp png_ptr) { - return (png_ptr? png_ptr->user_chunk_cache_max : 0); + return (png_ptr ? png_ptr->user_chunk_cache_max : 0); } + /* This function was added to libpng 1.4.1 */ png_alloc_size_t PNGAPI -png_get_chunk_malloc_max (png_structp png_ptr) +png_get_chunk_malloc_max (png_const_structp png_ptr) { - return (png_ptr? - png_ptr->user_chunk_malloc_max : 0); + return (png_ptr ? png_ptr->user_chunk_malloc_max : 0); } #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ @@ -912,14 +1103,21 @@ png_get_chunk_malloc_max (png_structp png_ptr) png_uint_32 PNGAPI png_get_io_state (png_structp png_ptr) { - return png_ptr->io_state; + return png_ptr->io_state; } -png_bytep PNGAPI -png_get_io_chunk_name (png_structp png_ptr) +png_uint_32 PNGAPI +png_get_io_chunk_type (png_const_structp png_ptr) { return png_ptr->chunk_name; } + +png_const_bytep PNGAPI +png_get_io_chunk_name (png_structp png_ptr) +{ + PNG_CSTRING_FROM_CHUNK(png_ptr->io_chunk_string, png_ptr->chunk_name); + return png_ptr->io_chunk_string; +} #endif /* ?PNG_IO_STATE_SUPPORTED */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/src/png/pnginfo.h b/src/png/pnginfo.h new file mode 100644 index 0000000000..a33bfab06d --- /dev/null +++ b/src/png/pnginfo.h @@ -0,0 +1,269 @@ + +/* pnginfo.h - header file for PNG reference library + * + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * Last changed in libpng 1.5.0 [January 6, 2011] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + + /* png_info is a structure that holds the information in a PNG file so + * that the application can find out the characteristics of the image. + * If you are reading the file, this structure will tell you what is + * in the PNG file. If you are writing the file, fill in the information + * you want to put into the PNG file, using png_set_*() functions, then + * call png_write_info(). + * + * The names chosen should be very close to the PNG specification, so + * consult that document for information about the meaning of each field. + * + * With libpng < 0.95, it was only possible to directly set and read the + * the values in the png_info_struct, which meant that the contents and + * order of the values had to remain fixed. With libpng 0.95 and later, + * however, there are now functions that abstract the contents of + * png_info_struct from the application, so this makes it easier to use + * libpng with dynamic libraries, and even makes it possible to use + * libraries that don't have all of the libpng ancillary chunk-handing + * functionality. In libpng-1.5.0 this was moved into a separate private + * file that is not visible to applications. + * + * The following members may have allocated storage attached that should be + * cleaned up before the structure is discarded: palette, trans, text, + * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile, + * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these + * are automatically freed when the info structure is deallocated, if they were + * allocated internally by libpng. This behavior can be changed by means + * of the png_data_freer() function. + * + * More allocation details: all the chunk-reading functions that + * change these members go through the corresponding png_set_* + * functions. A function to clear these members is available: see + * png_free_data(). The png_set_* functions do not depend on being + * able to point info structure members to any of the storage they are + * passed (they make their own copies), EXCEPT that the png_set_text + * functions use the same storage passed to them in the text_ptr or + * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns + * functions do not make their own copies. + */ +#ifndef PNGINFO_H +#define PNGINFO_H + +struct png_info_def +{ + /* the following are necessary for every PNG file */ + png_uint_32 width; /* width of image in pixels (from IHDR) */ + png_uint_32 height; /* height of image in pixels (from IHDR) */ + png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */ + png_size_t rowbytes; /* bytes needed to hold an untransformed row */ + png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */ + png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */ + png_uint_16 num_trans; /* number of transparent palette color (tRNS) */ + png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */ + png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */ + /* The following three should have been named *_method not *_type */ + png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */ + png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */ + png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ + + /* The following is informational only on read, and not used on writes. */ + png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */ + png_byte pixel_depth; /* number of bits per pixel */ + png_byte spare_byte; /* to align the data, and for future use */ + png_byte signature[8]; /* magic bytes read by libpng from start of file */ + + /* The rest of the data is optional. If you are reading, check the + * valid field to see if the information in these are valid. If you + * are writing, set the valid field to those chunks you want written, + * and initialize the appropriate fields below. + */ + +#if defined(PNG_gAMA_SUPPORTED) + /* The gAMA chunk describes the gamma characteristics of the system + * on which the image was created, normally in the range [1.0, 2.5]. + * Data is valid if (valid & PNG_INFO_gAMA) is non-zero. + */ + png_fixed_point gamma; +#endif + +#ifdef PNG_sRGB_SUPPORTED + /* GR-P, 0.96a */ + /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */ + png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */ +#endif + +#ifdef PNG_TEXT_SUPPORTED + /* The tEXt, and zTXt chunks contain human-readable textual data in + * uncompressed, compressed, and optionally compressed forms, respectively. + * The data in "text" is an array of pointers to uncompressed, + * null-terminated C strings. Each chunk has a keyword that describes the + * textual data contained in that chunk. Keywords are not required to be + * unique, and the text string may be empty. Any number of text chunks may + * be in an image. + */ + int num_text; /* number of comments read or comments to write */ + int max_text; /* current size of text array */ + png_textp text; /* array of comments read or comments to write */ +#endif /* PNG_TEXT_SUPPORTED */ + +#ifdef PNG_tIME_SUPPORTED + /* The tIME chunk holds the last time the displayed image data was + * modified. See the png_time struct for the contents of this struct. + */ + png_time mod_time; +#endif + +#ifdef PNG_sBIT_SUPPORTED + /* The sBIT chunk specifies the number of significant high-order bits + * in the pixel data. Values are in the range [1, bit_depth], and are + * only specified for the channels in the pixel data. The contents of + * the low-order bits is not specified. Data is valid if + * (valid & PNG_INFO_sBIT) is non-zero. + */ + png_color_8 sig_bit; /* significant bits in color channels */ +#endif + +#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \ +defined(PNG_READ_BACKGROUND_SUPPORTED) + /* The tRNS chunk supplies transparency data for paletted images and + * other image types that don't need a full alpha channel. There are + * "num_trans" transparency values for a paletted image, stored in the + * same order as the palette colors, starting from index 0. Values + * for the data are in the range [0, 255], ranging from fully transparent + * to fully opaque, respectively. For non-paletted images, there is a + * single color specified that should be treated as fully transparent. + * Data is valid if (valid & PNG_INFO_tRNS) is non-zero. + */ + png_bytep trans_alpha; /* alpha values for paletted image */ + png_color_16 trans_color; /* transparent color for non-palette image */ +#endif + +#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + /* The bKGD chunk gives the suggested image background color if the + * display program does not have its own background color and the image + * is needs to composited onto a background before display. The colors + * in "background" are normally in the same color space/depth as the + * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero. + */ + png_color_16 background; +#endif + +#ifdef PNG_oFFs_SUPPORTED + /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards + * and downwards from the top-left corner of the display, page, or other + * application-specific co-ordinate space. See the PNG_OFFSET_ defines + * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero. + */ + png_int_32 x_offset; /* x offset on page */ + png_int_32 y_offset; /* y offset on page */ + png_byte offset_unit_type; /* offset units type */ +#endif + +#ifdef PNG_pHYs_SUPPORTED + /* The pHYs chunk gives the physical pixel density of the image for + * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_ + * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero. + */ + png_uint_32 x_pixels_per_unit; /* horizontal pixel density */ + png_uint_32 y_pixels_per_unit; /* vertical pixel density */ + png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */ +#endif + +#ifdef PNG_hIST_SUPPORTED + /* The hIST chunk contains the relative frequency or importance of the + * various palette entries, so that a viewer can intelligently select a + * reduced-color palette, if required. Data is an array of "num_palette" + * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST) + * is non-zero. + */ + png_uint_16p hist; +#endif + +#ifdef PNG_cHRM_SUPPORTED + /* The cHRM chunk describes the CIE color characteristics of the monitor + * on which the PNG was created. This data allows the viewer to do gamut + * mapping of the input image to ensure that the viewer sees the same + * colors in the image as the creator. Values are in the range + * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero. + */ + png_fixed_point x_white; + png_fixed_point y_white; + png_fixed_point x_red; + png_fixed_point y_red; + png_fixed_point x_green; + png_fixed_point y_green; + png_fixed_point x_blue; + png_fixed_point y_blue; +#endif + +#ifdef PNG_pCAL_SUPPORTED + /* The pCAL chunk describes a transformation between the stored pixel + * values and original physical data values used to create the image. + * The integer range [0, 2^bit_depth - 1] maps to the floating-point + * range given by [pcal_X0, pcal_X1], and are further transformed by a + * (possibly non-linear) transformation function given by "pcal_type" + * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_ + * defines below, and the PNG-Group's PNG extensions document for a + * complete description of the transformations and how they should be + * implemented, and for a description of the ASCII parameter strings. + * Data values are valid if (valid & PNG_INFO_pCAL) non-zero. + */ + png_charp pcal_purpose; /* pCAL chunk description string */ + png_int_32 pcal_X0; /* minimum value */ + png_int_32 pcal_X1; /* maximum value */ + png_charp pcal_units; /* Latin-1 string giving physical units */ + png_charpp pcal_params; /* ASCII strings containing parameter values */ + png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */ + png_byte pcal_nparams; /* number of parameters given in pcal_params */ +#endif + +/* New members added in libpng-1.0.6 */ + png_uint_32 free_me; /* flags items libpng is responsible for freeing */ + +#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ + defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) + /* Storage for unknown chunks that the library doesn't recognize. */ + png_unknown_chunkp unknown_chunks; + int unknown_chunks_num; +#endif + +#ifdef PNG_iCCP_SUPPORTED + /* iCCP chunk data. */ + png_charp iccp_name; /* profile name */ + png_bytep iccp_profile; /* International Color Consortium profile data */ + png_uint_32 iccp_proflen; /* ICC profile data length */ + png_byte iccp_compression; /* Always zero */ +#endif + +#ifdef PNG_sPLT_SUPPORTED + /* Data on sPLT chunks (there may be more than one). */ + png_sPLT_tp splt_palettes; + png_uint_32 splt_palettes_num; +#endif + +#ifdef PNG_sCAL_SUPPORTED + /* The sCAL chunk describes the actual physical dimensions of the + * subject matter of the graphic. The chunk contains a unit specification + * a byte value, and two ASCII strings representing floating-point + * values. The values are width and height corresponsing to one pixel + * in the image. Data values are valid if (valid & PNG_INFO_sCAL) is + * non-zero. + */ + png_byte scal_unit; /* unit of physical scale */ + png_charp scal_s_width; /* string containing height */ + png_charp scal_s_height; /* string containing width */ +#endif + +#ifdef PNG_INFO_IMAGE_SUPPORTED + /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS) + non-zero */ + /* Data valid if (valid & PNG_INFO_IDAT) non-zero */ + png_bytepp row_pointers; /* the image bits */ +#endif + +}; +#endif /* PNGINFO_H */ diff --git a/src/png/pnglibconf.h b/src/png/pnglibconf.h new file mode 100644 index 0000000000..8022a5a881 --- /dev/null +++ b/src/png/pnglibconf.h @@ -0,0 +1,187 @@ + +/* libpng STANDARD API DEFINITION */ + +/* pnglibconf.h - library build configuration */ + +/* libpng version 1.5.4 - last changed on June 22, 2011 */ + +/* Copyright (c) 1998-2011 Glenn Randers-Pehrson */ + +/* This code is released under the libpng license. */ +/* For conditions of distribution and use, see the disclaimer */ +/* and license in png.h */ + +/* pnglibconf.h */ +/* Derived from: scripts/pnglibconf.dfa */ +/* If you edit this file by hand you must obey the rules expressed in */ +/* pnglibconf.dfa with respect to the dependencies between the following */ +/* symbols. It is much better to generate a new file using */ +/* scripts/libpngconf.mak */ + +#ifndef PNGLCONF_H +#define PNGLCONF_H +/* settings */ +#define PNG_API_RULE 0 +#define PNG_CALLOC_SUPPORTED +#define PNG_COST_SHIFT 3 +#define PNG_DEFAULT_READ_MACROS 1 +#define PNG_GAMMA_THRESHOLD_FIXED 5000 +#define PNG_MAX_GAMMA_8 11 +#define PNG_QUANTIZE_BLUE_BITS 5 +#define PNG_QUANTIZE_GREEN_BITS 5 +#define PNG_QUANTIZE_RED_BITS 5 +#define PNG_sCAL_PRECISION 5 +#define PNG_USER_CHUNK_CACHE_MAX 0 +#define PNG_USER_CHUNK_MALLOC_MAX 0 +#define PNG_USER_HEIGHT_MAX 1000000 +#define PNG_USER_WIDTH_MAX 1000000 +#define PNG_WEIGHT_SHIFT 8 +#define PNG_ZBUF_SIZE 8192 +/* end of settings */ +/* options */ +#define PNG_16BIT_SUPPORTED +#define PNG_ALIGN_MEMORY_SUPPORTED +#define PNG_BENIGN_ERRORS_SUPPORTED +#define PNG_bKGD_SUPPORTED +#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED +#define PNG_CHECK_cHRM_SUPPORTED +#define PNG_cHRM_SUPPORTED +#define PNG_CONSOLE_IO_SUPPORTED +#define PNG_CONVERT_tIME_SUPPORTED +#define PNG_EASY_ACCESS_SUPPORTED +/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/ +#define PNG_ERROR_TEXT_SUPPORTED +#define PNG_FIXED_POINT_SUPPORTED +#define PNG_FLOATING_ARITHMETIC_SUPPORTED +#define PNG_FLOATING_POINT_SUPPORTED +#define PNG_gAMA_SUPPORTED +#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED +#define PNG_hIST_SUPPORTED +#define PNG_iCCP_SUPPORTED +#define PNG_INCH_CONVERSIONS_SUPPORTED +#define PNG_INFO_IMAGE_SUPPORTED +#define PNG_IO_STATE_SUPPORTED +#define PNG_iTXt_SUPPORTED +#define PNG_MNG_FEATURES_SUPPORTED +#define PNG_oFFs_SUPPORTED +#define PNG_pCAL_SUPPORTED +#define PNG_pHYs_SUPPORTED +#define PNG_POINTER_INDEXING_SUPPORTED +#define PNG_PROGRESSIVE_READ_SUPPORTED +#define PNG_READ_16BIT_SUPPORTED +#define PNG_READ_ALPHA_MODE_SUPPORTED +#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED +#define PNG_READ_BACKGROUND_SUPPORTED +#define PNG_READ_BGR_SUPPORTED +#define PNG_READ_bKGD_SUPPORTED +#define PNG_READ_cHRM_SUPPORTED +#define PNG_READ_COMPOSITE_NODIV_SUPPORTED +#define PNG_READ_COMPRESSED_TEXT_SUPPORTED +#define PNG_READ_EXPAND_16_SUPPORTED +#define PNG_READ_EXPAND_SUPPORTED +#define PNG_READ_FILLER_SUPPORTED +#define PNG_READ_gAMA_SUPPORTED +#define PNG_READ_GAMMA_SUPPORTED +#define PNG_READ_GRAY_TO_RGB_SUPPORTED +#define PNG_READ_hIST_SUPPORTED +#define PNG_READ_iCCP_SUPPORTED +#define PNG_READ_INTERLACING_SUPPORTED +#define PNG_READ_INT_FUNCTIONS_SUPPORTED +#define PNG_READ_INVERT_ALPHA_SUPPORTED +#define PNG_READ_INVERT_SUPPORTED +#define PNG_READ_iTXt_SUPPORTED +#define PNG_READ_oFFs_SUPPORTED +#define PNG_READ_OPT_PLTE_SUPPORTED +#define PNG_READ_PACK_SUPPORTED +#define PNG_READ_PACKSWAP_SUPPORTED +#define PNG_READ_pCAL_SUPPORTED +#define PNG_READ_pHYs_SUPPORTED +#define PNG_READ_QUANTIZE_SUPPORTED +#define PNG_READ_RGB_TO_GRAY_SUPPORTED +#define PNG_READ_sBIT_SUPPORTED +#define PNG_READ_SCALE_16_TO_8_SUPPORTED +#define PNG_READ_sCAL_SUPPORTED +#define PNG_READ_SHIFT_SUPPORTED +#define PNG_READ_sPLT_SUPPORTED +#define PNG_READ_sRGB_SUPPORTED +#define PNG_READ_STRIP_16_TO_8_SUPPORTED +#define PNG_READ_STRIP_ALPHA_SUPPORTED +#define PNG_READ_SUPPORTED +#define PNG_READ_SWAP_ALPHA_SUPPORTED +#define PNG_READ_SWAP_SUPPORTED +#define PNG_READ_tEXt_SUPPORTED +#define PNG_READ_TEXT_SUPPORTED +#define PNG_READ_tIME_SUPPORTED +#define PNG_READ_TRANSFORMS_SUPPORTED +#define PNG_READ_tRNS_SUPPORTED +#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_READ_USER_CHUNKS_SUPPORTED +#define PNG_READ_USER_TRANSFORM_SUPPORTED +#define PNG_READ_zTXt_SUPPORTED +#define PNG_SAVE_INT_32_SUPPORTED +#define PNG_sBIT_SUPPORTED +#define PNG_sCAL_SUPPORTED +#define PNG_SEQUENTIAL_READ_SUPPORTED +#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED +#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED +#define PNG_SETJMP_SUPPORTED +#define PNG_SET_USER_LIMITS_SUPPORTED +#define PNG_sPLT_SUPPORTED +#define PNG_sRGB_SUPPORTED +#define PNG_STDIO_SUPPORTED +#define PNG_tEXt_SUPPORTED +#define PNG_TEXT_SUPPORTED +#define PNG_TIME_RFC1123_SUPPORTED +#define PNG_tIME_SUPPORTED +#define PNG_tRNS_SUPPORTED +#define PNG_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_USER_CHUNKS_SUPPORTED +#define PNG_USER_LIMITS_SUPPORTED +#define PNG_USER_MEM_SUPPORTED +#define PNG_USER_TRANSFORM_INFO_SUPPORTED +#define PNG_USER_TRANSFORM_PTR_SUPPORTED +#define PNG_WARNINGS_SUPPORTED +#define PNG_WRITE_16BIT_SUPPORTED +#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED +#define PNG_WRITE_BGR_SUPPORTED +#define PNG_WRITE_bKGD_SUPPORTED +#define PNG_WRITE_cHRM_SUPPORTED +#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED +#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED +#define PNG_WRITE_FILLER_SUPPORTED +#define PNG_WRITE_FILTER_SUPPORTED +#define PNG_WRITE_FLUSH_SUPPORTED +#define PNG_WRITE_gAMA_SUPPORTED +#define PNG_WRITE_hIST_SUPPORTED +#define PNG_WRITE_iCCP_SUPPORTED +#define PNG_WRITE_INTERLACING_SUPPORTED +#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED +#define PNG_WRITE_INVERT_ALPHA_SUPPORTED +#define PNG_WRITE_INVERT_SUPPORTED +#define PNG_WRITE_iTXt_SUPPORTED +#define PNG_WRITE_oFFs_SUPPORTED +#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED +#define PNG_WRITE_PACK_SUPPORTED +#define PNG_WRITE_PACKSWAP_SUPPORTED +#define PNG_WRITE_pCAL_SUPPORTED +#define PNG_WRITE_pHYs_SUPPORTED +#define PNG_WRITE_sBIT_SUPPORTED +#define PNG_WRITE_sCAL_SUPPORTED +#define PNG_WRITE_SHIFT_SUPPORTED +#define PNG_WRITE_sPLT_SUPPORTED +#define PNG_WRITE_sRGB_SUPPORTED +#define PNG_WRITE_SUPPORTED +#define PNG_WRITE_SWAP_ALPHA_SUPPORTED +#define PNG_WRITE_SWAP_SUPPORTED +#define PNG_WRITE_tEXt_SUPPORTED +#define PNG_WRITE_TEXT_SUPPORTED +#define PNG_WRITE_tIME_SUPPORTED +#define PNG_WRITE_TRANSFORMS_SUPPORTED +#define PNG_WRITE_tRNS_SUPPORTED +#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_WRITE_USER_TRANSFORM_SUPPORTED +#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED +#define PNG_WRITE_zTXt_SUPPORTED +#define PNG_zTXt_SUPPORTED +/* end of options */ +#endif /* PNGLCONF_H */ diff --git a/src/png/pngmem.c b/src/png/pngmem.c index c8a3f6f59a..ea606d6a62 100644 --- a/src/png/pngmem.c +++ b/src/png/pngmem.c @@ -1,8 +1,8 @@ /* pngmem.c - stub functions for memory allocation * - * Last changed in libpng 1.4.2 [May 6, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.4 [July 7, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -17,40 +17,42 @@ * identify the replacement functions. */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #include "pngpriv.h" +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + /* Borland DOS special memory handler */ #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) /* If you change this, be sure to change the one in png.h also */ /* Allocate memory for a png_struct. The malloc and memset can be replaced by a single call to calloc() if this is thought to improve performance. */ -png_voidp /* PRIVATE */ -png_create_struct(int type) +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_create_struct,(int type),PNG_ALLOCATED) { -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED return (png_create_struct_2(type, NULL, NULL)); } /* Alternate version of png_create_struct, for use with user-defined malloc. */ -png_voidp /* PRIVATE */ -png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), + PNG_ALLOCATED) { -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ png_size_t size; png_voidp struct_ptr; if (type == PNG_STRUCT_INFO) size = png_sizeof(png_info); + else if (type == PNG_STRUCT_PNG) size = png_sizeof(png_struct); + else return (png_get_copyright(NULL)); -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED if (malloc_fn != NULL) { png_struct dummy_struct; @@ -58,11 +60,13 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) png_ptr->mem_ptr=mem_ptr; struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size); } + else -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ struct_ptr = (png_voidp)farmalloc(size); if (struct_ptr != NULL) png_memset(struct_ptr, 0, size); + return (struct_ptr); } @@ -70,7 +74,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) void /* PRIVATE */ png_destroy_struct(png_voidp struct_ptr) { -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED png_destroy_struct_2(struct_ptr, NULL, NULL); } @@ -79,10 +83,10 @@ void /* PRIVATE */ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, png_voidp mem_ptr) { -#endif +# endif if (struct_ptr != NULL) { -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED if (free_fn != NULL) { png_struct dummy_struct; @@ -91,7 +95,8 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, (*(free_fn))(png_ptr, struct_ptr); return; } -#endif /* PNG_USER_MEM_SUPPORTED */ + +# endif /* PNG_USER_MEM_SUPPORTED */ farfree (struct_ptr); } } @@ -115,55 +120,62 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, * result, we would be truncating potentially larger memory requests * (which should cause a fatal error) and introducing major problems. */ -png_voidp PNGAPI -png_calloc(png_structp png_ptr, png_alloc_size_t size) +PNG_FUNCTION(png_voidp,PNGAPI +png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; ret = (png_malloc(png_ptr, size)); + if (ret != NULL) png_memset(ret,0,(png_size_t)size); + return (ret); } -png_voidp PNGAPI -png_malloc(png_structp png_ptr, png_alloc_size_t size) +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; if (png_ptr == NULL || size == 0) return (NULL); -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED if (png_ptr->malloc_fn != NULL) ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); + else ret = (png_malloc_default(png_ptr, size)); + if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out of memory"); + return (ret); } -png_voidp PNGAPI -png_malloc_default(png_structp png_ptr, png_alloc_size_t size) +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ if (png_ptr == NULL || size == 0) return (NULL); -#ifdef PNG_MAX_MALLOC_64K +# ifdef PNG_MAX_MALLOC_64K if (size > (png_uint_32)65536L) { png_warning(png_ptr, "Cannot Allocate > 64K"); ret = NULL; } + else -#endif +# endif if (size != (size_t)size) ret = NULL; + else if (size == (png_uint_32)65536L) { if (png_ptr->offset_table == NULL) @@ -175,8 +187,9 @@ png_malloc_default(png_structp png_ptr, png_alloc_size_t size) int num_blocks; png_uint_32 total_size; png_bytep table; - int i; + int i, mem_level, window_bits; png_byte huge * hptr; + int window_bits if (ret != NULL) { @@ -184,12 +197,23 @@ png_malloc_default(png_structp png_ptr, png_alloc_size_t size) ret = NULL; } - if (png_ptr->zlib_window_bits > 14) - num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14)); + window_bits = + png_ptr->zlib_window_bits >= png_ptr->zlib_text_window_bits ? + png_ptr->zlib_window_bits : png_ptr->zlib_text_window_bits; + + if (window_bits > 14) + num_blocks = (int)(1 << (window_bits - 14)); + else num_blocks = 1; - if (png_ptr->zlib_mem_level >= 7) - num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7)); + + mem_level = + png_ptr->zlib_mem_level >= png_ptr->zlib_text_mem_level ? + png_ptr->zlib_mem_level : png_ptr->zlib_text_mem_level; + + if (mem_level >= 7) + num_blocks += (int)(1 << (mem_level - 7)); + else num_blocks++; @@ -199,25 +223,27 @@ png_malloc_default(png_structp png_ptr, png_alloc_size_t size) if (table == NULL) { -#ifndef PNG_USER_MEM_SUPPORTED +# ifndef PNG_USER_MEM_SUPPORTED if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */ + else png_warning(png_ptr, "Out Of Memory"); -#endif +# endif return (NULL); } if ((png_size_t)table & 0xfff0) { -#ifndef PNG_USER_MEM_SUPPORTED +# ifndef PNG_USER_MEM_SUPPORTED if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Farmalloc didn't return normalized pointer"); + else png_warning(png_ptr, "Farmalloc didn't return normalized pointer"); -#endif +# endif return (NULL); } @@ -227,12 +253,13 @@ png_malloc_default(png_structp png_ptr, png_alloc_size_t size) if (png_ptr->offset_table_ptr == NULL) { -#ifndef PNG_USER_MEM_SUPPORTED +# ifndef PNG_USER_MEM_SUPPORTED if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */ + else png_warning(png_ptr, "Out Of memory"); -#endif +# endif return (NULL); } @@ -242,6 +269,7 @@ png_malloc_default(png_structp png_ptr, png_alloc_size_t size) hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ } + for (i = 0; i < num_blocks; i++) { png_ptr->offset_table_ptr[i] = (png_bytep)hptr; @@ -256,29 +284,32 @@ png_malloc_default(png_structp png_ptr, png_alloc_size_t size) if (png_ptr->offset_table_count >= png_ptr->offset_table_number) { -#ifndef PNG_USER_MEM_SUPPORTED +# ifndef PNG_USER_MEM_SUPPORTED if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); /* Note "o" and "M" */ + png_error(png_ptr, "Out of Memory"); /* Note "O" and "M" */ + else png_warning(png_ptr, "Out of Memory"); -#endif +# endif return (NULL); } ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; } + else ret = farmalloc(size); -#ifndef PNG_USER_MEM_SUPPORTED +# ifndef PNG_USER_MEM_SUPPORTED if (ret == NULL) { if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */ + else png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */ } -#endif +# endif return (ret); } @@ -293,12 +324,13 @@ png_free(png_structp png_ptr, png_voidp ptr) if (png_ptr == NULL || ptr == NULL) return; -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED if (png_ptr->free_fn != NULL) { (*(png_ptr->free_fn))(png_ptr, ptr); return; } + else png_free_default(png_ptr, ptr); } @@ -306,7 +338,7 @@ png_free(png_structp png_ptr, png_voidp ptr) void PNGAPI png_free_default(png_structp png_ptr, png_voidp ptr) { -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ if (png_ptr == NULL || ptr == NULL) return; @@ -334,9 +366,7 @@ png_free_default(png_structp png_ptr, png_voidp ptr) } if (ptr != NULL) - { farfree(ptr); - } } #else /* Not the Borland DOS special memory handler */ @@ -344,52 +374,58 @@ png_free_default(png_structp png_ptr, png_voidp ptr) /* Allocate memory for a png_struct or a png_info. The malloc and memset can be replaced by a single call to calloc() if this is thought to improve performance noticably. */ -png_voidp /* PRIVATE */ -png_create_struct(int type) +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_create_struct,(int type),PNG_ALLOCATED) { -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED return (png_create_struct_2(type, NULL, NULL)); } /* Allocate memory for a png_struct or a png_info. The malloc and memset can be replaced by a single call to calloc() if this is thought to improve performance noticably. */ -png_voidp /* PRIVATE */ -png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), + PNG_ALLOCATED) { -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ png_size_t size; png_voidp struct_ptr; if (type == PNG_STRUCT_INFO) size = png_sizeof(png_info); + else if (type == PNG_STRUCT_PNG) size = png_sizeof(png_struct); + else return (NULL); -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED if (malloc_fn != NULL) { png_struct dummy_struct; png_structp png_ptr = &dummy_struct; png_ptr->mem_ptr=mem_ptr; struct_ptr = (*(malloc_fn))(png_ptr, size); + if (struct_ptr != NULL) png_memset(struct_ptr, 0, size); + return (struct_ptr); } -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ -#if defined(__TURBOC__) && !defined(__FLAT__) +# if defined(__TURBOC__) && !defined(__FLAT__) struct_ptr = (png_voidp)farmalloc(size); -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) +# else +# if defined(_MSC_VER) && defined(MAXSEG_64K) struct_ptr = (png_voidp)halloc(size, 1); -# else +# else struct_ptr = (png_voidp)malloc(size); -# endif -#endif +# endif +# endif + if (struct_ptr != NULL) png_memset(struct_ptr, 0, size); @@ -401,7 +437,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) void /* PRIVATE */ png_destroy_struct(png_voidp struct_ptr) { -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED png_destroy_struct_2(struct_ptr, NULL, NULL); } @@ -410,10 +446,10 @@ void /* PRIVATE */ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, png_voidp mem_ptr) { -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ if (struct_ptr != NULL) { -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED if (free_fn != NULL) { png_struct dummy_struct; @@ -422,16 +458,19 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, (*(free_fn))(png_ptr, struct_ptr); return; } -#endif /* PNG_USER_MEM_SUPPORTED */ -#if defined(__TURBOC__) && !defined(__FLAT__) +# endif /* PNG_USER_MEM_SUPPORTED */ +# if defined(__TURBOC__) && !defined(__FLAT__) farfree(struct_ptr); -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) + +# else +# if defined(_MSC_VER) && defined(MAXSEG_64K) hfree(struct_ptr); -# else + +# else free(struct_ptr); -# endif -#endif + +# endif +# endif } } @@ -442,80 +481,92 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, * have the ability to do that. */ -png_voidp PNGAPI -png_calloc(png_structp png_ptr, png_alloc_size_t size) +PNG_FUNCTION(png_voidp,PNGAPI +png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; ret = (png_malloc(png_ptr, size)); + if (ret != NULL) png_memset(ret,0,(png_size_t)size); + return (ret); } -png_voidp PNGAPI -png_malloc(png_structp png_ptr, png_alloc_size_t size) +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED if (png_ptr == NULL || size == 0) return (NULL); if (png_ptr->malloc_fn != NULL) ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); + else ret = (png_malloc_default(png_ptr, size)); + if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out of Memory"); + return (ret); } -png_voidp PNGAPI -png_malloc_default(png_structp png_ptr, png_alloc_size_t size) +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ if (png_ptr == NULL || size == 0) return (NULL); -#ifdef PNG_MAX_MALLOC_64K +# ifdef PNG_MAX_MALLOC_64K if (size > (png_uint_32)65536L) { -#ifndef PNG_USER_MEM_SUPPORTED +# ifndef PNG_USER_MEM_SUPPORTED if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Cannot Allocate > 64K"); + else -#endif +# endif return NULL; } -#endif +# endif /* Check for overflow */ -#if defined(__TURBOC__) && !defined(__FLAT__) +# if defined(__TURBOC__) && !defined(__FLAT__) + if (size != (unsigned long)size) ret = NULL; + else ret = farmalloc(size); -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) + +# else +# if defined(_MSC_VER) && defined(MAXSEG_64K) if (size != (unsigned long)size) ret = NULL; + else ret = halloc(size, 1); -# else + +# else if (size != (size_t)size) ret = NULL; + else ret = malloc((size_t)size); -# endif -#endif +# endif +# endif -#ifndef PNG_USER_MEM_SUPPORTED +# ifndef PNG_USER_MEM_SUPPORTED if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out of Memory"); -#endif +# endif return (ret); } @@ -529,34 +580,38 @@ png_free(png_structp png_ptr, png_voidp ptr) if (png_ptr == NULL || ptr == NULL) return; -#ifdef PNG_USER_MEM_SUPPORTED +# ifdef PNG_USER_MEM_SUPPORTED if (png_ptr->free_fn != NULL) { (*(png_ptr->free_fn))(png_ptr, ptr); return; } + else png_free_default(png_ptr, ptr); } + void PNGAPI png_free_default(png_structp png_ptr, png_voidp ptr) { if (png_ptr == NULL || ptr == NULL) return; -#endif /* PNG_USER_MEM_SUPPORTED */ +# endif /* PNG_USER_MEM_SUPPORTED */ -#if defined(__TURBOC__) && !defined(__FLAT__) +# if defined(__TURBOC__) && !defined(__FLAT__) farfree(ptr); -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) + +# else +# if defined(_MSC_VER) && defined(MAXSEG_64K) hfree(ptr); -# else + +# else free(ptr); -# endif -#endif -} +# endif +# endif +} #endif /* Not Borland DOS special memory handler */ /* This function was added at libpng version 1.2.3. The png_malloc_warn() @@ -564,8 +619,8 @@ png_free_default(png_structp png_ptr, png_voidp ptr) * instead of issuing a png_error, if it fails to allocate the requested * memory. */ -png_voidp PNGAPI -png_malloc_warn(png_structp png_ptr, png_alloc_size_t size) +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ptr; png_uint_32 save_flags; @@ -601,10 +656,11 @@ png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr * pointer before png_write_destroy and png_read_destroy are called. */ png_voidp PNGAPI -png_get_mem_ptr(png_structp png_ptr) +png_get_mem_ptr(png_const_structp png_ptr) { if (png_ptr == NULL) return (NULL); + return ((png_voidp)png_ptr->mem_ptr); } #endif /* PNG_USER_MEM_SUPPORTED */ diff --git a/src/png/pngpread.c b/src/png/pngpread.c index e33b4286fa..aab0e83708 100644 --- a/src/png/pngpread.c +++ b/src/png/pngpread.c @@ -1,8 +1,8 @@ /* pngpread.c - read a png file in push mode * - * Last changed in libpng 1.4.3 [June 26, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -11,11 +11,10 @@ * and license in png.h */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED #include "pngpriv.h" +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED + /* Push model modes */ #define PNG_READ_SIG_MODE 0 #define PNG_READ_CHUNK_MODE 1 @@ -29,7 +28,7 @@ void PNGAPI png_process_data(png_structp png_ptr, png_infop info_ptr, - png_bytep buffer, png_size_t buffer_size) + png_bytep buffer, png_size_t buffer_size) { if (png_ptr == NULL || info_ptr == NULL) return; @@ -42,6 +41,64 @@ png_process_data(png_structp png_ptr, png_infop info_ptr, } } +png_size_t PNGAPI +png_process_data_pause(png_structp png_ptr, int save) +{ + if (png_ptr != NULL) + { + /* It's easiest for the caller if we do the save, then the caller doesn't + * have to supply the same data again: + */ + if (save) + png_push_save_buffer(png_ptr); + else + { + /* This includes any pending saved bytes: */ + png_size_t remaining = png_ptr->buffer_size; + png_ptr->buffer_size = 0; + + /* So subtract the saved buffer size, unless all the data + * is actually 'saved', in which case we just return 0 + */ + if (png_ptr->save_buffer_size < remaining) + return remaining - png_ptr->save_buffer_size; + } + } + + return 0; +} + +png_uint_32 PNGAPI +png_process_data_skip(png_structp png_ptr) +{ + png_uint_32 remaining = 0; + + if (png_ptr != NULL && png_ptr->process_mode == PNG_SKIP_MODE && + png_ptr->skip_length > 0) + { + /* At the end of png_process_data the buffer size must be 0 (see the loop + * above) so we can detect a broken call here: + */ + if (png_ptr->buffer_size != 0) + png_error(png_ptr, + "png_process_data_skip called inside png_process_data"); + + /* If is impossible for there to be a saved buffer at this point - + * otherwise we could not be in SKIP mode. This will also happen if + * png_process_skip is called inside png_process_data (but only very + * rarely.) + */ + if (png_ptr->save_buffer_size != 0) + png_error(png_ptr, "png_process_data_skip called with saved data"); + + remaining = png_ptr->skip_length; + png_ptr->skip_length = 0; + png_ptr->process_mode = PNG_READ_CHUNK_MODE; + } + + return remaining; +} + /* What we do with the incoming data depends on what we were previously * doing before we ran out of data... */ @@ -127,7 +184,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr) } png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]), - num_to_check); + num_to_check); png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check); if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) @@ -135,6 +192,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr) if (num_checked < 4 && png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) png_error(png_ptr, "Not a PNG file"); + else png_error(png_ptr, "PNG file corrupted by ASCII conversion"); } @@ -150,61 +208,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr) void /* PRIVATE */ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) { - PNG_IHDR; - PNG_IDAT; - PNG_IEND; - PNG_PLTE; -#ifdef PNG_READ_bKGD_SUPPORTED - PNG_bKGD; -#endif -#ifdef PNG_READ_cHRM_SUPPORTED - PNG_cHRM; -#endif -#ifdef PNG_READ_gAMA_SUPPORTED - PNG_gAMA; -#endif -#ifdef PNG_READ_hIST_SUPPORTED - PNG_hIST; -#endif -#ifdef PNG_READ_iCCP_SUPPORTED - PNG_iCCP; -#endif -#ifdef PNG_READ_iTXt_SUPPORTED - PNG_iTXt; -#endif -#ifdef PNG_READ_oFFs_SUPPORTED - PNG_oFFs; -#endif -#ifdef PNG_READ_pCAL_SUPPORTED - PNG_pCAL; -#endif -#ifdef PNG_READ_pHYs_SUPPORTED - PNG_pHYs; -#endif -#ifdef PNG_READ_sBIT_SUPPORTED - PNG_sBIT; -#endif -#ifdef PNG_READ_sCAL_SUPPORTED - PNG_sCAL; -#endif -#ifdef PNG_READ_sRGB_SUPPORTED - PNG_sRGB; -#endif -#ifdef PNG_READ_sPLT_SUPPORTED - PNG_sPLT; -#endif -#ifdef PNG_READ_tEXt_SUPPORTED - PNG_tEXt; -#endif -#ifdef PNG_READ_tIME_SUPPORTED - PNG_tIME; -#endif -#ifdef PNG_READ_tRNS_SUPPORTED - PNG_tRNS; -#endif -#ifdef PNG_READ_zTXt_SUPPORTED - PNG_zTXt; -#endif + png_uint_32 chunk_name; /* First we make sure we have enough data for the 4 byte chunk name * and the 4 byte chunk length before proceeding with decoding the @@ -215,6 +219,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) { png_byte chunk_length[4]; + png_byte chunk_tag[4]; if (png_ptr->buffer_size < 8) { @@ -225,16 +230,27 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) png_push_fill_buffer(png_ptr, chunk_length, 4); png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length); png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); + png_crc_read(png_ptr, chunk_tag, 4); + png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag); png_check_chunk_name(png_ptr, png_ptr->chunk_name); png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; } - if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - if (png_ptr->mode & PNG_AFTER_IDAT) - png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; + chunk_name = png_ptr->chunk_name; + + if (chunk_name == png_IDAT) + { + /* This is here above the if/else case statement below because if the + * unknown handling marks 'IDAT' as unknown then the IDAT handling case is + * completely skipped. + * + * TODO: there must be a better way of doing this. + */ + if (png_ptr->mode & PNG_AFTER_IDAT) + png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; + } - if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4)) + if (chunk_name == png_IHDR) { if (png_ptr->push_length != 13) png_error(png_ptr, "Invalid IHDR length"); @@ -248,7 +264,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length); } - else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) + else if (chunk_name == png_IEND) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -263,7 +279,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) } #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name)) + else if (png_chunk_unknown_handling(png_ptr, chunk_name)) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -271,27 +287,27 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) return; } - if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + if (chunk_name == png_IDAT) png_ptr->mode |= PNG_HAVE_IDAT; png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length); - if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) + if (chunk_name == png_PLTE) png_ptr->mode |= PNG_HAVE_PLTE; - else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + else if (chunk_name == png_IDAT) { if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before IDAT"); else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) + !(png_ptr->mode & PNG_HAVE_PLTE)) png_error(png_ptr, "Missing PLTE before IDAT"); } } #endif - else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) + else if (chunk_name == png_PLTE) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -301,7 +317,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length); } - else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + else if (chunk_name == png_IDAT) { /* If we reach an IDAT chunk, this means we have read all of the * header chunks, and we can start reading the image (or if this @@ -337,7 +353,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) } #ifdef PNG_READ_gAMA_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4)) + else if (png_ptr->chunk_name == png_gAMA) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -350,7 +366,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_sBIT_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4)) + else if (png_ptr->chunk_name == png_sBIT) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -363,7 +379,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_cHRM_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4)) + else if (png_ptr->chunk_name == png_cHRM) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -376,7 +392,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_sRGB_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4)) + else if (chunk_name == png_sRGB) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -389,7 +405,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_iCCP_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4)) + else if (png_ptr->chunk_name == png_iCCP) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -402,7 +418,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_sPLT_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4)) + else if (chunk_name == png_sPLT) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -415,7 +431,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_tRNS_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4)) + else if (chunk_name == png_tRNS) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -428,7 +444,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_bKGD_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4)) + else if (chunk_name == png_bKGD) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -441,7 +457,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_hIST_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4)) + else if (chunk_name == png_hIST) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -454,7 +470,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_pHYs_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4)) + else if (chunk_name == png_pHYs) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -467,7 +483,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_oFFs_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4)) + else if (chunk_name == png_oFFs) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -480,7 +496,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_pCAL_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4)) + else if (chunk_name == png_pCAL) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -493,7 +509,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_sCAL_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4)) + else if (chunk_name == png_sCAL) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -506,7 +522,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_tIME_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4)) + else if (chunk_name == png_tIME) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -519,7 +535,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_tEXt_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4)) + else if (chunk_name == png_tEXt) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -532,7 +548,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_zTXt_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4)) + else if (chunk_name == png_zTXt) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -545,7 +561,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_iTXt_SUPPORTED - else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4)) + else if (chunk_name == png_iTXt) { if (png_ptr->push_length + 4 > png_ptr->buffer_size) { @@ -582,32 +598,45 @@ png_push_crc_finish(png_structp png_ptr) { if (png_ptr->skip_length && png_ptr->save_buffer_size) { - png_size_t save_size; + png_size_t save_size = png_ptr->save_buffer_size; + png_uint_32 skip_length = png_ptr->skip_length; + + /* We want the smaller of 'skip_length' and 'save_buffer_size', but + * they are of different types and we don't know which variable has the + * fewest bits. Carefully select the smaller and cast it to the type of + * the larger - this cannot overflow. Do not cast in the following test + * - it will break on either 16 or 64 bit platforms. + */ + if (skip_length < save_size) + save_size = (png_size_t)skip_length; - if (png_ptr->skip_length < (png_uint_32)png_ptr->save_buffer_size) - save_size = (png_size_t)png_ptr->skip_length; else - save_size = png_ptr->save_buffer_size; + skip_length = (png_uint_32)save_size; png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size); - png_ptr->skip_length -= save_size; + png_ptr->skip_length -= skip_length; png_ptr->buffer_size -= save_size; png_ptr->save_buffer_size -= save_size; png_ptr->save_buffer_ptr += save_size; } if (png_ptr->skip_length && png_ptr->current_buffer_size) { - png_size_t save_size; + png_size_t save_size = png_ptr->current_buffer_size; + png_uint_32 skip_length = png_ptr->skip_length; + + /* We want the smaller of 'skip_length' and 'current_buffer_size', here, + * the same problem exists as above and the same solution. + */ + if (skip_length < save_size) + save_size = (png_size_t)skip_length; - if (png_ptr->skip_length < (png_uint_32)png_ptr->current_buffer_size) - save_size = (png_size_t)png_ptr->skip_length; else - save_size = png_ptr->current_buffer_size; + skip_length = (png_uint_32)save_size; png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size); - png_ptr->skip_length -= save_size; + png_ptr->skip_length -= skip_length; png_ptr->buffer_size -= save_size; png_ptr->current_buffer_size -= save_size; png_ptr->current_buffer_ptr += save_size; @@ -625,7 +654,7 @@ png_push_crc_finish(png_structp png_ptr) } } -void PNGAPI +void PNGCBAPI png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) { png_bytep ptr; @@ -640,6 +669,7 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) if (length < png_ptr->save_buffer_size) save_size = length; + else save_size = png_ptr->save_buffer_size; @@ -680,33 +710,35 @@ png_push_save_buffer(png_structp png_ptr) istop = png_ptr->save_buffer_size; for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer; - i < istop; i++, sp++, dp++) + i < istop; i++, sp++, dp++) { *dp = *sp; } } } if (png_ptr->save_buffer_size + png_ptr->current_buffer_size > - png_ptr->save_buffer_max) + png_ptr->save_buffer_max) { png_size_t new_max; png_bytep old_buffer; if (png_ptr->save_buffer_size > PNG_SIZE_MAX - - (png_ptr->current_buffer_size + 256)) + (png_ptr->current_buffer_size + 256)) { - png_error(png_ptr, "Potential overflow of save_buffer"); + png_error(png_ptr, "Potential overflow of save_buffer"); } new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256; old_buffer = png_ptr->save_buffer; png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, - (png_size_t)new_max); + (png_size_t)new_max); + if (png_ptr->save_buffer == NULL) { - png_free(png_ptr, old_buffer); - png_error(png_ptr, "Insufficient memory for save_buffer"); + png_free(png_ptr, old_buffer); + png_error(png_ptr, "Insufficient memory for save_buffer"); } + png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); png_free(png_ptr, old_buffer); png_ptr->save_buffer_max = new_max; @@ -735,11 +767,12 @@ png_push_restore_buffer(png_structp png_ptr, png_bytep buffer, void /* PRIVATE */ png_push_read_IDAT(png_structp png_ptr) { - PNG_IDAT; if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) { png_byte chunk_length[4]; + png_byte chunk_tag[4]; + /* TODO: this code can be commoned up with the same code in push_read */ if (png_ptr->buffer_size < 8) { png_push_save_buffer(png_ptr); @@ -749,63 +782,71 @@ png_push_read_IDAT(png_structp png_ptr) png_push_fill_buffer(png_ptr, chunk_length, 4); png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length); png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); + png_crc_read(png_ptr, chunk_tag, 4); + png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag); png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + if (png_ptr->chunk_name != png_IDAT) { png_ptr->process_mode = PNG_READ_CHUNK_MODE; + if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) png_error(png_ptr, "Not enough compressed data"); + return; } png_ptr->idat_size = png_ptr->push_length; } + if (png_ptr->idat_size && png_ptr->save_buffer_size) { - png_size_t save_size; - - if (png_ptr->idat_size < (png_uint_32)png_ptr->save_buffer_size) - { - save_size = (png_size_t)png_ptr->idat_size; + png_size_t save_size = png_ptr->save_buffer_size; + png_uint_32 idat_size = png_ptr->idat_size; + + /* We want the smaller of 'idat_size' and 'current_buffer_size', but they + * are of different types and we don't know which variable has the fewest + * bits. Carefully select the smaller and cast it to the type of the + * larger - this cannot overflow. Do not cast in the following test - it + * will break on either 16 or 64 bit platforms. + */ + if (idat_size < save_size) + save_size = (png_size_t)idat_size; - /* Check for overflow */ - if ((png_uint_32)save_size != png_ptr->idat_size) - png_error(png_ptr, "save_size overflowed in pngpread"); - } else - save_size = png_ptr->save_buffer_size; + idat_size = (png_uint_32)save_size; png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size); png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size); - png_ptr->idat_size -= save_size; + png_ptr->idat_size -= idat_size; png_ptr->buffer_size -= save_size; png_ptr->save_buffer_size -= save_size; png_ptr->save_buffer_ptr += save_size; } + if (png_ptr->idat_size && png_ptr->current_buffer_size) { - png_size_t save_size; + png_size_t save_size = png_ptr->current_buffer_size; + png_uint_32 idat_size = png_ptr->idat_size; - if (png_ptr->idat_size < (png_uint_32)png_ptr->current_buffer_size) - { - save_size = (png_size_t)png_ptr->idat_size; + /* We want the smaller of 'idat_size' and 'current_buffer_size', but they + * are of different types and we don't know which variable has the fewest + * bits. Carefully select the smaller and cast it to the type of the + * larger - this cannot overflow. + */ + if (idat_size < save_size) + save_size = (png_size_t)idat_size; - /* Check for overflow */ - if ((png_uint_32)save_size != png_ptr->idat_size) - png_error(png_ptr, "save_size overflowed in pngpread"); - } else - save_size = png_ptr->current_buffer_size; + idat_size = (png_uint_32)save_size; png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size); png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size); - png_ptr->idat_size -= save_size; + png_ptr->idat_size -= idat_size; png_ptr->buffer_size -= save_size; png_ptr->current_buffer_size -= save_size; png_ptr->current_buffer_ptr += save_size; @@ -843,12 +884,12 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, * or the stream marked as finished. */ while (png_ptr->zstream.avail_in > 0 && - !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) { int ret; /* We have data for zlib, but we must check that zlib - * has somewhere to put the results. It doesn't matter + * has someplace to put the results. It doesn't matter * if we don't expect any results -- it may be the input * data is just the LZ end code. */ @@ -857,15 +898,16 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, png_ptr->zstream.avail_out = (uInt) PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1; + png_ptr->zstream.next_out = png_ptr->row_buf; } /* Using Z_SYNC_FLUSH here means that an unterminated - * LZ stream can still be handled (a stream with a missing - * end code), otherwise (Z_NO_FLUSH) a future zlib - * implementation might defer output and, therefore, - * change the current behavior. (See comments in inflate.c - * for why this doesn't happen at present with zlib 1.2.5.) + * LZ stream (a stream with a missing end code) can still + * be handled, otherwise (Z_NO_FLUSH) a future zlib + * implementation might defer output and therefore + * change the current behavior (see comments in inflate.c + * for why this doesn't happen at present with zlib 1.2.5). */ ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH); @@ -881,6 +923,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, if (png_ptr->row_number >= png_ptr->num_rows || png_ptr->pass > 6) png_warning(png_ptr, "Truncated compressed data in IDAT"); + else png_error(png_ptr, "Decompression error in IDAT"); @@ -901,6 +944,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, /* Extra data. */ png_warning(png_ptr, "Extra compressed data in IDAT"); png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + /* Do no more processing; skip the unprocessed * input check below. */ @@ -922,40 +966,62 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, * after the zlib end code. */ if (png_ptr->zstream.avail_in > 0) - png_warning(png_ptr, "Extra compression data"); + png_warning(png_ptr, "Extra compression data in IDAT"); } void /* PRIVATE */ png_push_process_row(png_structp png_ptr) { - png_ptr->row_info.color_type = png_ptr->color_type; - png_ptr->row_info.width = png_ptr->iwidth; - png_ptr->row_info.channels = png_ptr->channels; - png_ptr->row_info.bit_depth = png_ptr->bit_depth; - png_ptr->row_info.pixel_depth = png_ptr->pixel_depth; + /* 1.5.6: row_info moved out of png_struct to a local here. */ + png_row_info row_info; - png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth, - png_ptr->row_info.width); + row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */ + row_info.color_type = png_ptr->color_type; + row_info.bit_depth = png_ptr->bit_depth; + row_info.channels = png_ptr->channels; + row_info.pixel_depth = png_ptr->pixel_depth; + row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width); - png_read_filter_row(png_ptr, &(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->prev_row + 1, - (int)(png_ptr->row_buf[0])); + if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE) + { + if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST) + png_read_filter_row(&row_info, png_ptr->row_buf + 1, + png_ptr->prev_row + 1, png_ptr->row_buf[0]); + else + png_error(png_ptr, "bad adaptive filter value"); + } - png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1); + /* libpng 1.5.6: the following line was copying png_ptr->rowbytes before + * 1.5.6, while the buffer really is this big in current versions of libpng + * it may not be in the future, so this was changed just to copy the + * interlaced row count: + */ + png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED + if (png_ptr->transformations) + png_do_read_transformations(png_ptr, &row_info); +#endif + + /* The transformed pixel depth should match the depth now in row_info. */ + if (png_ptr->transformed_pixel_depth == 0) + { + png_ptr->transformed_pixel_depth = row_info.pixel_depth; + if (row_info.pixel_depth > png_ptr->maximum_pixel_depth) + png_error(png_ptr, "progressive row overflow"); + } + + else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth) + png_error(png_ptr, "internal progressive row size calculation error"); - if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA)) - png_do_read_transformations(png_ptr); #ifdef PNG_READ_INTERLACING_SUPPORTED /* Blow up interlaced rows to full size */ if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) { if (png_ptr->pass < 6) -/* old interface (pre-1.0.9): - png_do_read_interlace(&(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations); - */ - png_do_read_interlace(png_ptr); + png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass, + png_ptr->transformations); switch (png_ptr->pass) { @@ -1109,6 +1175,8 @@ png_push_process_row(png_structp png_ptr) break; } + + default: case 6: { png_push_have_row(png_ptr, png_ptr->row_buf + 1); @@ -1136,20 +1204,20 @@ png_read_push_finish_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ - PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; + static PNG_CONST png_byte FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; /* Offset to next interlace block */ - PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; /* Start of interlace block in the y direction */ - PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; + static PNG_CONST png_byte FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; /* Offset to next interlace block in the y direction */ - PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; + static PNG_CONST png_byte FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; /* Height of interlace block. This is not currently used - if you need * it, uncomment it here and in png.h - PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; */ png_ptr->row_number++; @@ -1160,15 +1228,15 @@ png_read_push_finish_row(png_structp png_ptr) if (png_ptr->interlaced) { png_ptr->row_number = 0; - png_memset(png_ptr->prev_row, 0, - png_ptr->rowbytes + 1); + png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); + do { png_ptr->pass++; if ((png_ptr->pass == 1 && png_ptr->width < 5) || (png_ptr->pass == 3 && png_ptr->width < 3) || (png_ptr->pass == 5 && png_ptr->width < 2)) - png_ptr->pass++; + png_ptr->pass++; if (png_ptr->pass > 7) png_ptr->pass--; @@ -1177,17 +1245,17 @@ png_read_push_finish_row(png_structp png_ptr) break; png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; + png_pass_inc[png_ptr->pass] - 1 - + png_pass_start[png_ptr->pass]) / + png_pass_inc[png_ptr->pass]; if (png_ptr->transformations & PNG_INTERLACE) break; png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; + png_pass_yinc[png_ptr->pass] - 1 - + png_pass_ystart[png_ptr->pass]) / + png_pass_yinc[png_ptr->pass]; } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0); } @@ -1197,12 +1265,13 @@ png_read_push_finish_row(png_structp png_ptr) #ifdef PNG_READ_tEXt_SUPPORTED void /* PRIVATE */ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 - length) + length) { if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) { + PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */ png_error(png_ptr, "Out of place tEXt"); - info_ptr = info_ptr; /* To quiet some compiler warnings */ + /* NOT REACHED */ } #ifdef PNG_MAX_MALLOC_64K @@ -1217,7 +1286,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 #endif png_ptr->current_text = (png_charp)png_malloc(png_ptr, - (png_size_t)(length + 1)); + (png_size_t)(length + 1)); png_ptr->current_text[length] = '\0'; png_ptr->current_text_ptr = png_ptr->current_text; png_ptr->current_text_size = (png_size_t)length; @@ -1270,14 +1339,12 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr) if (text < key + png_ptr->current_text_size) text++; - text_ptr = (png_textp)png_malloc(png_ptr, - png_sizeof(png_text)); + text_ptr = (png_textp)png_malloc(png_ptr, png_sizeof(png_text)); text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; text_ptr->key = key; -#ifdef PNG_iTXt_SUPPORTED + text_ptr->itxt_length = 0; text_ptr->lang = NULL; text_ptr->lang_key = NULL; -#endif text_ptr->text = text; ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); @@ -1287,7 +1354,7 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr) png_ptr->current_text = NULL; if (ret) - png_warning(png_ptr, "Insufficient memory to store text chunk"); + png_warning(png_ptr, "Insufficient memory to store text chunk"); } } #endif @@ -1298,10 +1365,11 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) - { - png_error(png_ptr, "Out of place zTXt"); - info_ptr = info_ptr; /* To quiet some compiler warnings */ - } + { + PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */ + png_error(png_ptr, "Out of place zTXt"); + /* NOT REACHED */ + } #ifdef PNG_MAX_MALLOC_64K /* We can't handle zTXt chunks > 64K, since we don't have enough space @@ -1317,7 +1385,7 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 #endif png_ptr->current_text = (png_charp)png_malloc(png_ptr, - (png_size_t)(length + 1)); + (png_size_t)(length + 1)); png_ptr->current_text[length] = '\0'; png_ptr->current_text_ptr = png_ptr->current_text; png_ptr->current_text_size = (png_size_t)length; @@ -1382,9 +1450,9 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr) text++; - png_ptr->zstream.next_in = (png_bytep )text; + png_ptr->zstream.next_in = (png_bytep)text; png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size - - (text - key)); + (text - key)); png_ptr->zstream.next_out = png_ptr->zbuf; png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; @@ -1405,42 +1473,45 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr) png_free(png_ptr, text); return; } + if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END) { if (text == NULL) { text = (png_charp)png_malloc(png_ptr, - (png_ptr->zbuf_size - - png_ptr->zstream.avail_out + key_size + 1)); + (png_ptr->zbuf_size + - png_ptr->zstream.avail_out + key_size + 1)); png_memcpy(text + key_size, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); + png_ptr->zbuf_size - png_ptr->zstream.avail_out); png_memcpy(text, key, key_size); text_size = key_size + png_ptr->zbuf_size - - png_ptr->zstream.avail_out; + png_ptr->zstream.avail_out; *(text + text_size) = '\0'; } + else { png_charp tmp; tmp = text; text = (png_charp)png_malloc(png_ptr, text_size + - (png_ptr->zbuf_size - - png_ptr->zstream.avail_out + 1)); + (png_ptr->zbuf_size + - png_ptr->zstream.avail_out + 1)); png_memcpy(text, tmp, text_size); png_free(png_ptr, tmp); png_memcpy(text + text_size, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); + png_ptr->zbuf_size - png_ptr->zstream.avail_out); text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out; *(text + text_size) = '\0'; } + if (ret != Z_STREAM_END) { png_ptr->zstream.next_out = png_ptr->zbuf; @@ -1476,10 +1547,9 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr) png_sizeof(png_text)); text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt; text_ptr->key = key; -#ifdef PNG_iTXt_SUPPORTED + text_ptr->itxt_length = 0; text_ptr->lang = NULL; text_ptr->lang_key = NULL; -#endif text_ptr->text = text; ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); @@ -1488,7 +1558,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr) png_free(png_ptr, text_ptr); if (ret) - png_warning(png_ptr, "Insufficient memory to store text chunk"); + png_warning(png_ptr, "Insufficient memory to store text chunk"); } } #endif @@ -1496,13 +1566,14 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_iTXt_SUPPORTED void /* PRIVATE */ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 - length) + length) { if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) - { - png_error(png_ptr, "Out of place iTXt"); - info_ptr = info_ptr; /* To quiet some compiler warnings */ - } + { + PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */ + png_error(png_ptr, "Out of place iTXt"); + /* NOT REACHED */ + } #ifdef PNG_MAX_MALLOC_64K png_ptr->skip_length = 0; /* This may not be necessary */ @@ -1516,7 +1587,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 #endif png_ptr->current_text = (png_charp)png_malloc(png_ptr, - (png_size_t)(length + 1)); + (png_size_t)(length + 1)); png_ptr->current_text[length] = '\0'; png_ptr->current_text_ptr = png_ptr->current_text; png_ptr->current_text_size = (png_size_t)length; @@ -1542,6 +1613,7 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr) png_ptr->current_text_left -= text_size; png_ptr->current_text_ptr += text_size; } + if (!(png_ptr->current_text_left)) { png_textp text_ptr; @@ -1585,15 +1657,15 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr) if (lang_key < key + png_ptr->current_text_size - 1) { - for (; *text; text++) - /* Empty loop */ ; + for (; *text; text++) + /* Empty loop */ ; } if (text < key + png_ptr->current_text_size) text++; text_ptr = (png_textp)png_malloc(png_ptr, - png_sizeof(png_text)); + png_sizeof(png_text)); text_ptr->compression = comp_flag + 2; text_ptr->key = key; @@ -1620,42 +1692,47 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr) */ void /* PRIVATE */ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 - length) + length) { png_uint_32 skip = 0; + png_uint_32 chunk_name = png_ptr->chunk_name; - if (!(png_ptr->chunk_name[0] & 0x20)) + if (PNG_CHUNK_CRITICAL(chunk_name)) { #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED - if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != - PNG_HANDLE_CHUNK_ALWAYS + if (png_chunk_unknown_handling(png_ptr, chunk_name) != + PNG_HANDLE_CHUNK_ALWAYS #ifdef PNG_READ_USER_CHUNKS_SUPPORTED - && png_ptr->read_user_chunk_fn == NULL + && png_ptr->read_user_chunk_fn == NULL #endif - ) + ) #endif png_chunk_error(png_ptr, "unknown critical chunk"); - info_ptr = info_ptr; /* To quiet some compiler warnings */ + PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */ } #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + /* TODO: the code below is apparently just using the + * png_struct::unknown_chunk member as a temporarily variable, it should be + * possible to eliminate both it and the temporary buffer. + */ if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) { #ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) + if (length > 65535) { - png_warning(png_ptr, "unknown chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; + png_warning(png_ptr, "unknown chunk too large to fit in memory"); + skip = length - 65535; + length = 65535; } #endif - png_memcpy((png_charp)png_ptr->unknown_chunk.name, - (png_charp)png_ptr->chunk_name, - png_sizeof(png_ptr->unknown_chunk.name)); - png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name) - 1] - = '\0'; + /* This is just a record for the user; libpng doesn't use the character + * form of the name. + */ + PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name); + /* The following cast should be safe because of the check above. */ png_ptr->unknown_chunk.size = (png_size_t)length; if (length == 0) @@ -1664,8 +1741,9 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 else { png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, - (png_size_t)length); - png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length); + png_ptr->unknown_chunk.size); + png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, + png_ptr->unknown_chunk.size); } #ifdef PNG_READ_USER_CHUNKS_SUPPORTED @@ -1674,25 +1752,25 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 /* Callback to user unknown chunk handler */ int ret; ret = (*(png_ptr->read_user_chunk_fn)) - (png_ptr, &png_ptr->unknown_chunk); + (png_ptr, &png_ptr->unknown_chunk); if (ret < 0) png_chunk_error(png_ptr, "error in user chunk"); if (ret == 0) { - if (!(png_ptr->chunk_name[0] & 0x20)) - if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != - PNG_HANDLE_CHUNK_ALWAYS) + if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) + if (png_chunk_unknown_handling(png_ptr, chunk_name) != + PNG_HANDLE_CHUNK_ALWAYS) png_chunk_error(png_ptr, "unknown critical chunk"); png_set_unknown_chunks(png_ptr, info_ptr, - &png_ptr->unknown_chunk, 1); + &png_ptr->unknown_chunk, 1); } } else #endif - png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); + png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); png_free(png_ptr, png_ptr->unknown_chunk.data); png_ptr->unknown_chunk.data = NULL; } @@ -1725,24 +1803,27 @@ png_push_have_row(png_structp png_ptr, png_bytep row) (int)png_ptr->pass); } +#ifdef PNG_READ_INTERLACING_SUPPORTED void PNGAPI -png_progressive_combine_row (png_structp png_ptr, - png_bytep old_row, png_bytep new_row) +png_progressive_combine_row (png_structp png_ptr, png_bytep old_row, + png_const_bytep new_row) { - PNG_CONST int FARDATA png_pass_dsp_mask[7] = - {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; - if (png_ptr == NULL) return; - if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */ - png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]); + /* new_row is a flag here - if it is NULL then the app callback was called + * from an empty row (see the calls to png_struct::row_fn below), otherwise + * it must be png_ptr->row_buf+1 + */ + if (new_row != NULL) + png_combine_row(png_ptr, old_row, 1/*display*/); } +#endif /* PNG_READ_INTERLACING_SUPPORTED */ void PNGAPI png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr, - png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, - png_progressive_end_ptr end_fn) + png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, + png_progressive_end_ptr end_fn) { if (png_ptr == NULL) return; @@ -1755,7 +1836,7 @@ png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr, } png_voidp PNGAPI -png_get_progressive_ptr(png_structp png_ptr) +png_get_progressive_ptr(png_const_structp png_ptr) { if (png_ptr == NULL) return (NULL); diff --git a/src/png/pngpriv.h b/src/png/pngpriv.h index 19807e83c5..928fd8d609 100644 --- a/src/png/pngpriv.h +++ b/src/png/pngpriv.h @@ -1,12 +1,12 @@ - /* pngpriv.h - private declarations for use inside libpng * - * libpng version 1.4.4 - September 23, 2010 * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * + * Last changed in libpng 1.5.6 [November 3, 2011] + * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer * and license in png.h @@ -24,27 +24,235 @@ #ifndef PNGPRIV_H #define PNGPRIV_H -#ifndef PNG_VERSION_INFO_ONLY +/* Feature Test Macros. The following are defined here to ensure that correctly + * implemented libraries reveal the APIs libpng needs to build and hide those + * that are not needed and potentially damaging to the compilation. + * + * Feature Test Macros must be defined before any system header is included (see + * POSIX 1003.1 2.8.2 "POSIX Symbols." + * + * These macros only have an effect if the operating system supports either + * POSIX 1003.1 or C99, or both. On other operating systems (particularly + * Windows/Visual Studio) there is no effect; the OS specific tests below are + * still required (as of 2011-05-02.) + */ +#define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ +/* This is required for the definition of abort(), used as a last ditch + * error handler when all else fails. + */ #include +/* This is used to find 'offsetof', used below for alignment tests. */ +#include + +#define PNGLIB_BUILD /*libpng is being built, not used*/ + +#ifdef PNG_USER_CONFIG +# include "pngusr.h" + /* These should have been defined in pngusr.h */ +# ifndef PNG_USER_PRIVATEBUILD +# define PNG_USER_PRIVATEBUILD "Custom libpng build" +# endif +# ifndef PNG_USER_DLLFNAME_POSTFIX +# define PNG_USER_DLLFNAME_POSTFIX "Cb" +# endif +#endif + +/* Is this a build of a DLL where compilation of the object modules requires + * different preprocessor settings to those required for a simple library? If + * so PNG_BUILD_DLL must be set. + * + * If libpng is used inside a DLL but that DLL does not export the libpng APIs + * PNG_BUILD_DLL must not be set. To avoid the code below kicking in build a + * static library of libpng then link the DLL against that. + */ +#ifndef PNG_BUILD_DLL +# ifdef DLL_EXPORT + /* This is set by libtool when files are compiled for a DLL; libtool + * always compiles twice, even on systems where it isn't necessary. Set + * PNG_BUILD_DLL in case it is necessary: + */ +# define PNG_BUILD_DLL +# else +# ifdef _WINDLL + /* This is set by the Microsoft Visual Studio IDE in projects that + * build a DLL. It can't easily be removed from those projects (it + * isn't visible in the Visual Studio UI) so it is a fairly reliable + * indication that PNG_IMPEXP needs to be set to the DLL export + * attributes. + */ +# define PNG_BUILD_DLL +# else +# ifdef __DLL__ + /* This is set by the Borland C system when compiling for a DLL + * (as above.) + */ +# define PNG_BUILD_DLL +# else + /* Add additional compiler cases here. */ +# endif +# endif +# endif +#endif /* Setting PNG_BUILD_DLL if required */ + +/* See pngconf.h for more details: the builder of the library may set this on + * the command line to the right thing for the specific compilation system or it + * may be automagically set above (at present we know of no system where it does + * need to be set on the command line.) + * + * PNG_IMPEXP must be set here when building the library to prevent pngconf.h + * setting it to the "import" setting for a DLL build. + */ +#ifndef PNG_IMPEXP +# ifdef PNG_BUILD_DLL +# define PNG_IMPEXP PNG_DLL_EXPORT +# else + /* Not building a DLL, or the DLL doesn't require specific export + * definitions. + */ +# define PNG_IMPEXP +# endif +#endif + +/* No warnings for private or deprecated functions in the build: */ +#ifndef PNG_DEPRECATED +# define PNG_DEPRECATED +#endif +#ifndef PNG_PRIVATE +# define PNG_PRIVATE +#endif + +#include "png.h" +#include "pnginfo.h" +#include "pngstruct.h" + +/* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ +#ifndef PNG_DLL_EXPORT +# define PNG_DLL_EXPORT +#endif + +/* This is used for 16 bit gamma tables - only the top level pointers are const, + * this could be changed: + */ +typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; + +/* Added at libpng-1.2.9 */ +/* Moved to pngpriv.h at libpng-1.5.0 */ + +/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" + * script. We may need it here to get the correct configuration on things + * like limits. + */ +#ifdef PNG_CONFIGURE_LIBPNG +# ifdef HAVE_CONFIG_H +# include "config.h" +# endif +#endif + +/* Moved to pngpriv.h at libpng-1.5.0 */ +/* NOTE: some of these may have been used in external applications as + * these definitions were exposed in pngconf.h prior to 1.5. + */ + +/* If you are running on a machine where you cannot allocate more + * than 64K of memory at once, uncomment this. While libpng will not + * normally need that much memory in a chunk (unless you load up a very + * large file), zlib needs to know how big of a chunk it can use, and + * libpng thus makes sure to check any memory allocation to verify it + * will fit into memory. + * + * zlib provides 'MAXSEG_64K' which, if defined, indicates the + * same limit and pngconf.h (already included) sets the limit + * if certain operating systems are detected. + */ +#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) +# define PNG_MAX_MALLOC_64K +#endif + +#ifndef PNG_UNUSED +/* Unused formal parameter warnings are silenced using the following macro + * which is expected to have no bad effects on performance (optimizing + * compilers will probably remove it entirely). Note that if you replace + * it with something other than whitespace, you must include the terminating + * semicolon. + */ +# define PNG_UNUSED(param) (void)param; +#endif + +/* Just a little check that someone hasn't tried to define something + * contradictory. + */ +#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K) +# undef PNG_ZBUF_SIZE +# define PNG_ZBUF_SIZE 65536L +#endif + +/* PNG_STATIC is used to mark internal file scope functions if they need to be + * accessed for implementation tests (see the code in tests/?*). + */ +#ifndef PNG_STATIC +# define PNG_STATIC static +#endif + +/* If warnings or errors are turned off the code is disabled or redirected here. + * From 1.5.4 functions have been added to allow very limited formatting of + * error and warning messages - this code will also be disabled here. + */ +#ifdef PNG_WARNINGS_SUPPORTED +# define PNG_WARNING_PARAMETERS(p) png_warning_parameters p; +#else +# define png_warning(s1,s2) ((void)(s1)) +# define png_chunk_warning(s1,s2) ((void)(s1)) +# define png_warning_parameter(p,number,string) ((void)0) +# define png_warning_parameter_unsigned(p,number,format,value) ((void)0) +# define png_warning_parameter_signed(p,number,format,value) ((void)0) +# define png_formatted_warning(pp,p,message) ((void)(pp)) +# define PNG_WARNING_PARAMETERS(p) +#endif +#ifndef PNG_ERROR_TEXT_SUPPORTED +# define png_error(s1,s2) png_err(s1) +# define png_chunk_error(s1,s2) png_err(s1) +# define png_fixed_error(s1,s2) png_err(s1) +#endif + #ifndef PNG_EXTERN /* The functions exported by PNG_EXTERN are internal functions, which * aren't usually used outside the library (as far as I know), so it is * debatable if they should be exported at all. In the future, when it * is possible to have run-time registry of chunk-handling functions, - * some of these will be made available again. + * some of these might be made available again. # define PNG_EXTERN extern */ # define PNG_EXTERN #endif +/* Some fixed point APIs are still required even if not exported because + * they get used by the corresponding floating point APIs. This magic + * deals with this: + */ +#ifdef PNG_FIXED_POINT_SUPPORTED +# define PNGFAPI PNGAPI +#else +# define PNGFAPI /* PRIVATE */ +#endif + /* Other defines specific to compilers can go here. Try to keep * them inside an appropriate ifdef/endif pair for portability. */ - -#ifdef PNG_FLOATING_POINT_SUPPORTED -# if defined(MACOS) && !wxOSX_USE_IPHONE +#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\ + defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) + /* png.c requires the following ANSI-C constants if the conversion of + * floating point to ASCII is implemented therein: + * + * DBL_DIG Maximum number of decimal digits (can be set to any constant) + * DBL_MIN Smallest normalized fp number (can be set to an arbitrary value) + * DBL_MAX Maximum floating point number (can be set to an arbitrary value) + */ +# include + +# if ( ( (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ + defined(THINK_C) || defined(TARGET_OS_MAC) ) && !wxOSX_USE_IPHONE ) || defined(__SC__) /* We need to check that hasn't already been included earlier * as it seems it doesn't agree with , yet we should really use * if possible. @@ -63,11 +271,6 @@ # endif #endif -/* Codewarrior on NT has linking problems without this. */ -#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__) -# define PNG_ALWAYS_EXTERN -#endif - /* This provides the non-ANSI (far) memory allocation routines. */ #if defined(__TURBOC__) && defined(__MSDOS__) # include @@ -79,13 +282,109 @@ # include /* defines _WINDOWS_ macro */ #endif +/* Moved here around 1.5.0beta36 from pngconf.h */ +/* Users may want to use these so they are not private. Any library + * functions that are passed far data must be model-independent. + */ + +/* Memory model/platform independent fns */ +#ifndef PNG_ABORT +# ifdef _WINDOWS_ +# define PNG_ABORT() ExitProcess(0) +# else +# define PNG_ABORT() abort() +# endif +#endif + +#ifdef USE_FAR_KEYWORD +/* Use this to make far-to-near assignments */ +# define CHECK 1 +# define NOCHECK 0 +# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) +# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) +# define png_strlen _fstrlen +# define png_memcmp _fmemcmp /* SJT: added */ +# define png_memcpy _fmemcpy +# define png_memset _fmemset +#else +# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */ +# define CVT_PTR(ptr) (ptr) +# define CVT_PTR_NOCHECK(ptr) (ptr) +# define png_strlen lstrlenA +# define png_memcmp memcmp +# define png_memcpy CopyMemory +# define png_memset memset +# else +# define CVT_PTR(ptr) (ptr) +# define CVT_PTR_NOCHECK(ptr) (ptr) +# define png_strlen strlen +# define png_memcmp memcmp /* SJT: added */ +# define png_memcpy memcpy +# define png_memset memset +# endif +#endif + +/* These macros may need to be architecture dependent. */ +#define PNG_ALIGN_NONE 0 /* do not use data alignment */ +#define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */ +#ifdef offsetof +# define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */ +#else +# define PNG_ALIGN_OFFSET -1 /* prevent the use of this */ +#endif +#define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */ + +#ifndef PNG_ALIGN_TYPE + /* Default to using aligned access optimizations and requiring alignment to a + * multiple of the data type size. Override in a compiler specific fashion + * if necessary by inserting tests here: + */ +# define PNG_ALIGN_TYPE PNG_ALIGN_SIZE +#endif + +#if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE + /* This is used because in some compiler implementations non-aligned + * structure members are supported, so the offsetof approach below fails. + * Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access + * is good for performance. Do not do this unless you have tested the result + * and understand it. + */ +# define png_alignof(type) (sizeof (type)) +#else +# if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET +# define png_alignof(type) offsetof(struct{char c; type t;}, t) +# else +# if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS +# define png_alignof(type) (1) +# endif + /* Else leave png_alignof undefined to prevent use thereof */ +# endif +#endif + +/* This implicitly assumes alignment is always to a power of 2. */ +#ifdef png_alignof +# define png_isaligned(ptr, type)\ + ((((const char*)ptr-(const char*)0) & (png_alignof(type)-1)) == 0) +#else +# define png_isaligned(ptr, type) 0 +#endif + +/* End of memory model/platform independent support */ +/* End of 1.5.0beta36 move from pngconf.h */ + +/* CONSTANTS and UTILITY MACROS + * These are used internally by libpng and not exposed in the API + */ + /* Various modes of operation. Note that after an init, mode is set to - * zero automatically when the structure is created. + * zero automatically when the structure is created. Three of these + * are defined in png.h because they need to be visible to applications + * that call png_set_unknown_chunk(). */ -#define PNG_HAVE_IHDR 0x01 -#define PNG_HAVE_PLTE 0x02 +/* #define PNG_HAVE_IHDR 0x01 (defined in png.h) */ +/* #define PNG_HAVE_PLTE 0x02 (defined in png.h) */ #define PNG_HAVE_IDAT 0x04 -#define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */ +/* #define PNG_AFTER_IDAT 0x08 (defined in png.h) */ #define PNG_HAVE_IEND 0x10 #define PNG_HAVE_gAMA 0x20 #define PNG_HAVE_cHRM 0x40 @@ -104,41 +403,38 @@ #define PNG_SHIFT 0x0008 #define PNG_SWAP_BYTES 0x0010 #define PNG_INVERT_MONO 0x0020 -#define PNG_QUANTIZE 0x0040 /* formerly PNG_DITHER */ -#define PNG_BACKGROUND 0x0080 +#define PNG_QUANTIZE 0x0040 +#define PNG_COMPOSE 0x0080 /* Was PNG_BACKGROUND */ #define PNG_BACKGROUND_EXPAND 0x0100 - /* 0x0200 unused */ -#define PNG_16_TO_8 0x0400 +#define PNG_EXPAND_16 0x0200 /* Added to libpng 1.5.2 */ +#define PNG_16_TO_8 0x0400 /* Becomes 'chop' in 1.5.4 */ #define PNG_RGBA 0x0800 #define PNG_EXPAND 0x1000 #define PNG_GAMMA 0x2000 #define PNG_GRAY_TO_RGB 0x4000 -#define PNG_FILLER 0x8000L -#define PNG_PACKSWAP 0x10000L -#define PNG_SWAP_ALPHA 0x20000L -#define PNG_STRIP_ALPHA 0x40000L -#define PNG_INVERT_ALPHA 0x80000L -#define PNG_USER_TRANSFORM 0x100000L -#define PNG_RGB_TO_GRAY_ERR 0x200000L -#define PNG_RGB_TO_GRAY_WARN 0x400000L -#define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */ - /* 0x800000L Unused */ -#define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */ -#define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */ - /* 0x4000000L unused */ - /* 0x8000000L unused */ - /* 0x10000000L unused */ - /* 0x20000000L unused */ - /* 0x40000000L unused */ - +#define PNG_FILLER 0x8000 +#define PNG_PACKSWAP 0x10000 +#define PNG_SWAP_ALPHA 0x20000 +#define PNG_STRIP_ALPHA 0x40000 +#define PNG_INVERT_ALPHA 0x80000 +#define PNG_USER_TRANSFORM 0x100000 +#define PNG_RGB_TO_GRAY_ERR 0x200000 +#define PNG_RGB_TO_GRAY_WARN 0x400000 +#define PNG_RGB_TO_GRAY 0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */ +#define PNG_ENCODE_ALPHA 0x800000 /* Added to libpng-1.5.4 */ +#define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */ +#define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */ +#define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */ + /* 0x8000000 unused */ + /* 0x10000000 unused */ + /* 0x20000000 unused */ + /* 0x40000000 unused */ /* Flags for png_create_struct */ #define PNG_STRUCT_PNG 0x0001 #define PNG_STRUCT_INFO 0x0002 /* Scaling factor for filter heuristic weighting calculations */ -#define PNG_WEIGHT_SHIFT 8 #define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) -#define PNG_COST_SHIFT 3 #define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) /* Flags for the png_ptr->flags rather than declaring a byte for each one */ @@ -154,25 +450,25 @@ #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 #define PNG_FLAG_CRC_CRITICAL_USE 0x0400 #define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 - /* 0x1000 unused */ - /* 0x2000 unused */ - /* 0x4000 unused */ -#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L -#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L -#define PNG_FLAG_LIBRARY_MISMATCH 0x20000L -#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L -#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L -#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L -#define PNG_FLAG_ADD_ALPHA 0x200000L /* Added to libpng-1.2.8 */ -#define PNG_FLAG_STRIP_ALPHA 0x400000L /* Added to libpng-1.2.8 */ -#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000L /* Added to libpng-1.4.0 */ - /* 0x1000000L unused */ - /* 0x2000000L unused */ - /* 0x4000000L unused */ - /* 0x8000000L unused */ - /* 0x10000000L unused */ - /* 0x20000000L unused */ - /* 0x40000000L unused */ +#define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.4 */ +#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.4 */ +#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */ +#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000 +#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000 +#define PNG_FLAG_LIBRARY_MISMATCH 0x20000 +#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000 +#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000 +#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000 + /* 0x200000 unused */ + /* 0x400000 unused */ +#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */ +#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */ +#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000 /* to libpng-1.5.4 */ +#define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000 +#define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000 +#define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000 + /* 0x20000000 unused */ + /* 0x40000000 unused */ #define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ PNG_FLAG_CRC_ANCILLARY_NOWARN) @@ -183,6 +479,18 @@ #define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ PNG_FLAG_CRC_CRITICAL_MASK) +/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib + * can handle at once. This type need be no larger than 16 bits (so maximum of + * 65535), this define allows us to discover how big it is, but limited by the + * maximuum for png_size_t. The value can be overriden in a library build + * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably + * lower value (e.g. 255 works). A lower value may help memory usage (slightly) + * and may even improve performance on some systems (and degrade it on others.) + */ +#ifndef ZLIB_IO_MAX +# define ZLIB_IO_MAX ((uInt)-1) +#endif + /* Save typing and make code easier to understand */ #define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ @@ -201,34 +509,116 @@ * integers, "value" a variable. Added to libpng-1.2.6 JB */ #define PNG_OUT_OF_RANGE(value, ideal, delta) \ - ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) - -/* Constant strings for known chunk types. If you need to add a chunk, - * define the name here, and add an invocation of the macro wherever it's - * needed. - */ -#define PNG_IHDR PNG_CONST png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'} -#define PNG_IDAT PNG_CONST png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'} -#define PNG_IEND PNG_CONST png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'} -#define PNG_PLTE PNG_CONST png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'} -#define PNG_bKGD PNG_CONST png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'} -#define PNG_cHRM PNG_CONST png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'} -#define PNG_gAMA PNG_CONST png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'} -#define PNG_hIST PNG_CONST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'} -#define PNG_iCCP PNG_CONST png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'} -#define PNG_iTXt PNG_CONST png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'} -#define PNG_oFFs PNG_CONST png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'} -#define PNG_pCAL PNG_CONST png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'} -#define PNG_sCAL PNG_CONST png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'} -#define PNG_pHYs PNG_CONST png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'} -#define PNG_sBIT PNG_CONST png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'} -#define PNG_sPLT PNG_CONST png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'} -#define PNG_sRGB PNG_CONST png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'} -#define PNG_sTER PNG_CONST png_byte png_sTER[5] = {115, 84, 69, 82, '\0'} -#define PNG_tEXt PNG_CONST png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'} -#define PNG_tIME PNG_CONST png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} -#define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} -#define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} + ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) + +/* Conversions between fixed and floating point, only defined if + * required (to make sure the code doesn't accidentally use float + * when it is supposedly disabled.) + */ +#ifdef PNG_FLOATING_POINT_SUPPORTED +/* The floating point conversion can't overflow, though it can and + * does lose accuracy relative to the original fixed point value. + * In practice this doesn't matter because png_fixed_point only + * stores numbers with very low precision. The png_ptr and s + * arguments are unused by default but are there in case error + * checking becomes a requirement. + */ +#define png_float(png_ptr, fixed, s) (.00001 * (fixed)) + +/* The fixed point conversion performs range checking and evaluates + * its argument multiple times, so must be used with care. The + * range checking uses the PNG specification values for a signed + * 32 bit fixed point value except that the values are deliberately + * rounded-to-zero to an integral value - 21474 (21474.83 is roughly + * (2^31-1) * 100000). 's' is a string that describes the value being + * converted. + * + * NOTE: this macro will raise a png_error if the range check fails, + * therefore it is normally only appropriate to use this on values + * that come from API calls or other sources where an out of range + * error indicates a programming error, not a data error! + * + * NOTE: by default this is off - the macro is not used - because the + * function call saves a lot of code. + */ +#ifdef PNG_FIXED_POINT_MACRO_SUPPORTED +#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\ + ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0)) +#else +PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, + png_const_charp text)); +#endif +#endif + +/* Constants for known chunk types. If you need to add a chunk, define the name + * here. For historical reasons these constants have the form png_; i.e. + * the prefix is lower case. Please use decimal values as the parameters to + * match the ISO PNG specification and to avoid relying on the C locale + * interpretation of character values. + * + * Prior to 1.5.6 these constants were strings, as of 1.5.6 png_uint_32 values + * are computed and a new macro (PNG_STRING_FROM_CHUNK) added to allow a string + * to be generated if required. + * + * PNG_32b correctly produces a value shifted by up to 24 bits, even on + * architectures where (int) is only 16 bits. + */ +#define PNG_32b(b,s) ((png_uint_32)(b) << (s)) +#define PNG_CHUNK(b1,b2,b3,b4) \ + (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0)) + +#define png_IHDR PNG_CHUNK( 73, 72, 68, 82) +#define png_IDAT PNG_CHUNK( 73, 68, 65, 84) +#define png_IEND PNG_CHUNK( 73, 69, 78, 68) +#define png_PLTE PNG_CHUNK( 80, 76, 84, 69) +#define png_bKGD PNG_CHUNK( 98, 75, 71, 68) +#define png_cHRM PNG_CHUNK( 99, 72, 82, 77) +#define png_gAMA PNG_CHUNK(103, 65, 77, 65) +#define png_hIST PNG_CHUNK(104, 73, 83, 84) +#define png_iCCP PNG_CHUNK(105, 67, 67, 80) +#define png_iTXt PNG_CHUNK(105, 84, 88, 116) +#define png_oFFs PNG_CHUNK(111, 70, 70, 115) +#define png_pCAL PNG_CHUNK(112, 67, 65, 76) +#define png_sCAL PNG_CHUNK(115, 67, 65, 76) +#define png_pHYs PNG_CHUNK(112, 72, 89, 115) +#define png_sBIT PNG_CHUNK(115, 66, 73, 84) +#define png_sPLT PNG_CHUNK(115, 80, 76, 84) +#define png_sRGB PNG_CHUNK(115, 82, 71, 66) +#define png_sTER PNG_CHUNK(115, 84, 69, 82) +#define png_tEXt PNG_CHUNK(116, 69, 88, 116) +#define png_tIME PNG_CHUNK(116, 73, 77, 69) +#define png_tRNS PNG_CHUNK(116, 82, 78, 83) +#define png_zTXt PNG_CHUNK(122, 84, 88, 116) + +/* The following will work on (signed char*) strings, whereas the get_uint_32 + * macro will fail on top-bit-set values because of the sign extension. + */ +#define PNG_CHUNK_FROM_STRING(s)\ + PNG_CHUNK(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3]) + +/* This uses (char), not (png_byte) to avoid warnings on systems where (char) is + * signed and the argument is a (char[]) This macro will fail miserably on + * systems where (char) is more than 8 bits. + */ +#define PNG_STRING_FROM_CHUNK(s,c)\ + (void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\ + ((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c))) + +/* Do the same but terminate with a null character. */ +#define PNG_CSTRING_FROM_CHUNK(s,c)\ + (void)(PNG_STRING_FROM_CHUNK(s,c), ((char*)(s))[4] = 0) + +/* Test on flag values as defined in the spec (section 5.4): */ +#define PNG_CHUNK_ANCILLIARY(c) (1 & ((c) >> 29)) +#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLIARY(c)) +#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21)) +#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13)) +#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5)) + +/* Gamma values (new at libpng-1.5.4): */ +#define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */ +#define PNG_GAMMA_MAC_INVERSE 65909 +#define PNG_GAMMA_sRGB_INVERSE 45455 /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ @@ -242,71 +632,84 @@ extern "C" { * be found in the files where the functions are located. */ +/* Check the user version string for compatibility, returns false if the version + * numbers aren't compatible. + */ +PNG_EXTERN int png_user_version_check(png_structp png_ptr, + png_const_charp user_png_ver); + /* Allocate memory for an internal libpng struct */ -PNG_EXTERN png_voidp png_create_struct PNGARG((int type)); +PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)), + PNG_ALLOCATED); /* Free memory from internal libpng struct */ PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); -PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr - malloc_fn, png_voidp mem_ptr)); +PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2, + PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)), + PNG_ALLOCATED); PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, - png_free_ptr free_fn, png_voidp mem_ptr)); + png_free_ptr free_fn, png_voidp mem_ptr)); /* Free any memory that info_ptr points to and reset struct. */ PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr)); + png_infop info_ptr)); /* Function to allocate memory for zlib. PNGAPI is disallowed. */ -PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size)); +PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items, + uInt size)),PNG_ALLOCATED); /* Function to free memory for zlib. PNGAPI is disallowed. */ PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); -/* Next four functions are used internally as callbacks. PNGAPI is required - * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3. */ +/* Next four functions are used internally as callbacks. PNGCBAPI is required + * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to + * PNGCBAPI at 1.5.0 + */ -PNG_EXTERN void PNGAPI png_default_read_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); +PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr, + png_bytep data, png_size_t length)); #ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void PNGAPI png_push_fill_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t length)); +PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t length)); #endif -PNG_EXTERN void PNGAPI png_default_write_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); +PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr, + png_bytep data, png_size_t length)); #ifdef PNG_WRITE_FLUSH_SUPPORTED -#ifdef PNG_STDIO_SUPPORTED -PNG_EXTERN void PNGAPI png_default_flush PNGARG((png_structp png_ptr)); -#endif +# ifdef PNG_STDIO_SUPPORTED +PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr)); +# endif #endif /* Reset the CRC variable */ PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); /* Write the "data" buffer to whatever output you are using */ -PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); +PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, + png_const_bytep data, png_size_t length)); + +/* Read and check the PNG file signature */ +PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Read the chunk header (length + type name) */ PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); /* Read data from whatever input you are using into the "data" buffer */ PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); + png_size_t length)); /* Read bytes into buf, and update png_ptr->crc */ PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, - png_size_t length)); + png_size_t length)); /* Decompress data in a chunk that uses compression */ -#if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \ - defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) +#if defined(PNG_READ_COMPRESSED_TEXT_SUPPORTED) PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, - int comp_type, png_size_t chunklength, png_size_t prefix_length, - png_size_t *data_length)); + int comp_type, png_size_t chunklength, png_size_t prefix_length, + png_size_t *data_length)); #endif /* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ @@ -319,8 +722,8 @@ PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); * passing a maximum of 64K on systems that have this as a memory limit, * since this is the maximum buffer size we can specify. */ -PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr, - png_size_t length)); +PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, + png_const_bytep ptr, png_size_t length)); #ifdef PNG_WRITE_FLUSH_SUPPORTED PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); @@ -332,138 +735,133 @@ PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); * information. */ PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, - png_uint_32 height, - int bit_depth, int color_type, int compression_method, int filter_method, - int interlace_method)); + png_uint_32 height, + int bit_depth, int color_type, int compression_method, int filter_method, + int interlace_method)); -PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette, - png_uint_32 num_pal)); +PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, + png_const_colorp palette, png_uint_32 num_pal)); PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); + png_size_t length)); PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); #ifdef PNG_WRITE_gAMA_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED +# ifdef PNG_FLOATING_POINT_SUPPORTED PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED +# endif +# ifdef PNG_FIXED_POINT_SUPPORTED PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, png_fixed_point file_gamma)); -#endif +# endif #endif #ifdef PNG_WRITE_sBIT_SUPPORTED -PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit, - int color_type)); +PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, + png_const_color_8p sbit, int color_type)); #endif #ifdef PNG_WRITE_cHRM_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED +# ifdef PNG_FLOATING_POINT_SUPPORTED PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, - double white_x, double white_y, - double red_x, double red_y, double green_x, double green_y, - double blue_x, double blue_y)); -#endif + double white_x, double white_y, + double red_x, double red_y, double green_x, double green_y, + double blue_x, double blue_y)); +# endif PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); + png_fixed_point int_white_x, png_fixed_point int_white_y, + png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point + int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)); #endif #ifdef PNG_WRITE_sRGB_SUPPORTED PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, - int intent)); + int intent)); #endif #ifdef PNG_WRITE_iCCP_SUPPORTED PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, - png_charp name, int compression_type, - png_charp profile, int proflen)); + png_const_charp name, int compression_type, + png_const_charp profile, int proflen)); /* Note to maintainer: profile should be png_bytep */ #endif #ifdef PNG_WRITE_sPLT_SUPPORTED PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, - png_sPLT_tp palette)); + png_const_sPLT_tp palette)); #endif #ifdef PNG_WRITE_tRNS_SUPPORTED -PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans, - png_color_16p values, int number, int color_type)); +PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, + png_const_bytep trans, png_const_color_16p values, int number, + int color_type)); #endif #ifdef PNG_WRITE_bKGD_SUPPORTED PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, - png_color_16p values, int color_type)); + png_const_color_16p values, int color_type)); #endif #ifdef PNG_WRITE_hIST_SUPPORTED -PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist, - int num_hist)); +PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, + png_const_uint_16p hist, int num_hist)); #endif +/* Chunks that have keywords */ #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, - png_charp key, png_charpp new_key)); + png_const_charp key, png_charpp new_key)); #endif #ifdef PNG_WRITE_tEXt_SUPPORTED -PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key, - png_charp text, png_size_t text_len)); +PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key, + png_const_charp text, png_size_t text_len)); #endif #ifdef PNG_WRITE_zTXt_SUPPORTED -PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key, - png_charp text, png_size_t text_len, int compression)); +PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key, + png_const_charp text, png_size_t text_len, int compression)); #endif #ifdef PNG_WRITE_iTXt_SUPPORTED PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, - int compression, png_charp key, png_charp lang, png_charp lang_key, - png_charp text)); + int compression, png_const_charp key, png_const_charp lang, + png_const_charp lang_key, png_const_charp text)); #endif #ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, - png_infop info_ptr, png_textp text_ptr, int num_text)); + png_infop info_ptr, png_const_textp text_ptr, int num_text)); #endif #ifdef PNG_WRITE_oFFs_SUPPORTED PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, - png_int_32 x_offset, png_int_32 y_offset, int unit_type)); + png_int_32 x_offset, png_int_32 y_offset, int unit_type)); #endif #ifdef PNG_WRITE_pCAL_SUPPORTED PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, - png_int_32 X0, png_int_32 X1, int type, int nparams, - png_charp units, png_charpp params)); + png_int_32 X0, png_int_32 X1, int type, int nparams, + png_const_charp units, png_charpp params)); #endif #ifdef PNG_WRITE_pHYs_SUPPORTED PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, - png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, - int unit_type)); + png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, + int unit_type)); #endif #ifdef PNG_WRITE_tIME_SUPPORTED PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, - png_timep mod_time)); + png_const_timep mod_time)); #endif #ifdef PNG_WRITE_sCAL_SUPPORTED -#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) -PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr, - int unit, double width, double height)); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, - int unit, png_charp width, png_charp height)); -#endif -#endif + int unit, png_const_charp width, png_const_charp height)); #endif /* Called when finished processing a row of data */ @@ -472,22 +870,44 @@ PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); /* Internal use only. Called before first row of data */ PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); -#ifdef PNG_READ_GAMMA_SUPPORTED -PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, - png_byte bit_depth)); +/* Combine a row of data, dealing with alpha, etc. if requested. 'row' is an + * array of png_ptr->width pixels. If the image is not interlaced or this + * is the final pass this just does a png_memcpy, otherwise the "display" flag + * is used to determine whether to copy pixels that are not in the current pass. + * + * Because 'png_do_read_interlace' (below) replicates pixels this allows this + * function to achieve the documented 'blocky' appearance during interlaced read + * if display is 1 and the 'sparkle' appearance, where existing pixels in 'row' + * are not changed if they are not in the current pass, when display is 0. + * + * 'display' must be 0 or 1, otherwise the memcpy will be done regardless. + * + * The API always reads from the png_struct row buffer and always assumes that + * it is full width (png_do_read_interlace has already been called.) + * + * This function is only ever used to write to row buffers provided by the + * caller of the relevant libpng API and the row must have already been + * transformed by the read transformations. + * + * The PNG_USE_COMPILE_TIME_MASKS option causes generation of pre-computed + * bitmasks for use within the code, otherwise runtime generated masks are used. + * The default is compile time masks. + */ +#ifndef PNG_USE_COMPILE_TIME_MASKS +# define PNG_USE_COMPILE_TIME_MASKS 1 #endif - -/* Combine a row of data, dealing with alpha, etc. if requested */ PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, - int mask)); + int display)); #ifdef PNG_READ_INTERLACING_SUPPORTED -/* Expand an interlaced row */ -/* OLD pre-1.0.9 interface: -PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass, png_uint_32 transformations)); +/* Expand an interlaced row: the 'row_info' describes the pass data that has + * been read in and must correspond to the pixels in 'row', the pixels are + * expanded (moved apart) in 'row' to match the final layout, when doing this + * the pixels are *replicated* to the intervening space. This is essential for + * the correct operation of png_combine_row, above. */ -PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr)); +PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, + png_bytep row, int pass, png_uint_32 transformations)); #endif /* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ @@ -495,109 +915,125 @@ PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr)); #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Grab pixels out of a row for an interlaced pass */ PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass)); + png_bytep row, int pass)); #endif -/* Unfilter a row */ -PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr, - png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter)); +/* Unfilter a row: check the filter value before calling this, there is no point + * calling it for PNG_FILTER_VALUE_NONE. + */ +PNG_EXTERN void png_read_filter_row PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep prev_row, int filter)); /* Choose the best filter to use and filter the row data */ PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, - png_row_infop row_info)); + png_row_infop row_info)); -/* Write out the filtered row. */ -PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr, - png_bytep filtered_row)); /* Finish a row while reading, dealing with interlacing passes, etc. */ PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); /* Initialize the row buffers, etc. */ PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED /* Optional call to update the users info structure */ PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); + png_infop info_ptr)); +#endif /* These are the functions that do the transformations */ #ifdef PNG_READ_FILLER_SUPPORTED PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 filler, png_uint_32 flags)); + png_bytep row, png_uint_32 filler, png_uint_32 flags)); #endif #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); + png_bytep row)); #endif #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); + png_bytep row)); #endif #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); + png_bytep row)); #endif #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); + png_bytep row)); #endif #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 flags)); +PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info, + png_bytep row, int at_start)); #endif +#ifdef PNG_16BIT_SUPPORTED #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, png_bytep row)); +PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, + png_bytep row)); +#endif #endif #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ defined(PNG_WRITE_PACKSWAP_SUPPORTED) -PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, png_bytep row)); +PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, + png_bytep row)); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop - row_info, png_bytep row)); +PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, + png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, - png_bytep row)); + png_bytep row)); #endif #ifdef PNG_READ_PACK_SUPPORTED -PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row)); +PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, + png_bytep row)); #endif #ifdef PNG_READ_SHIFT_SUPPORTED -PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row, - png_color_8p sig_bits)); +PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, + png_bytep row, png_const_color_8p sig_bits)); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, png_bytep row)); +PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, + png_bytep row)); #endif -#ifdef PNG_READ_16_TO_8_SUPPORTED -PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row)); +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED +PNG_EXTERN void png_do_scale_16_to_8 PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED +PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, + png_bytep row)); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info, - png_bytep row, png_bytep palette_lookup, png_bytep quantize_lookup)); + png_bytep row, png_const_bytep palette_lookup, + png_const_bytep quantize_lookup)); # ifdef PNG_CORRECT_PALETTE_SUPPORTED PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette)); + png_colorp palette, int num_palette)); # endif #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, png_bytep row)); +PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, + png_bytep row)); #endif #ifdef PNG_WRITE_PACK_SUPPORTED @@ -606,35 +1042,37 @@ PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, #endif #ifdef PNG_WRITE_SHIFT_SUPPORTED -PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row, - png_color_8p bit_depth)); +PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, + png_bytep row, png_const_color_8p bit_depth)); #endif -#ifdef PNG_READ_BACKGROUND_SUPPORTED -#ifdef PNG_READ_GAMMA_SUPPORTED -PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, - png_color_16p trans_color, png_color_16p background, - png_color_16p background_1, - png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, - png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, - png_uint_16pp gamma_16_to_1, int gamma_shift)); -#else -PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, - png_color_16p trans_color, png_color_16p background)); -#endif +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) +PNG_EXTERN void png_do_compose PNGARG((png_row_infop row_info, + png_bytep row, png_structp png_ptr)); #endif #ifdef PNG_READ_GAMMA_SUPPORTED -PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row, - png_bytep gamma_table, png_uint_16pp gamma_16_table, - int gamma_shift)); +PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, + png_bytep row, png_structp png_ptr)); +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED +PNG_EXTERN void png_do_encode_alpha PNGARG((png_row_infop row_info, + png_bytep row, png_structp png_ptr)); #endif #ifdef PNG_READ_EXPAND_SUPPORTED PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, - png_bytep row, png_colorp palette, png_bytep trans, int num_trans)); + png_bytep row, png_const_colorp palette, png_const_bytep trans, + int num_trans)); PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, - png_bytep row, png_color_16p trans_value)); + png_bytep row, png_const_color_16p trans_color)); +#endif + +#ifdef PNG_READ_EXPAND_16_SUPPORTED +PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info, + png_bytep row)); #endif /* The following decodes the appropriate chunks, and does error correction, @@ -643,124 +1081,142 @@ PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, /* Decode the IHDR chunk */ PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #ifdef PNG_READ_bKGD_SUPPORTED PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_cHRM_SUPPORTED PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_gAMA_SUPPORTED PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_hIST_SUPPORTED PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_iCCP_SUPPORTED PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif /* PNG_READ_iCCP_SUPPORTED */ #ifdef PNG_READ_iTXt_SUPPORTED PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_oFFs_SUPPORTED PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_pCAL_SUPPORTED PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_pHYs_SUPPORTED PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_sBIT_SUPPORTED PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_sCAL_SUPPORTED PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_sPLT_SUPPORTED PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif /* PNG_READ_sPLT_SUPPORTED */ #ifdef PNG_READ_sRGB_SUPPORTED PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_tEXt_SUPPORTED PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_tIME_SUPPORTED PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_tRNS_SUPPORTED PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif #ifdef PNG_READ_zTXt_SUPPORTED PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); + png_uint_32 length)); #endif +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); + png_infop info_ptr, png_uint_32 length)); +#endif PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, - png_bytep chunk_name)); + png_uint_32 chunk_name)); + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +/* Exactly as png_handle_as_unknown() except that the argument is a 32-bit chunk + * name, not a string. + */ +PNG_EXTERN int png_chunk_unknown_handling PNGARG((png_structp png_ptr, + png_uint_32 chunk_name)); +#endif /* Handle the transformations for reading and writing */ -PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr)); +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr, + png_row_infop row_info)); +#endif +#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED +PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr, + png_row_infop row_info)); +#endif +#ifdef PNG_READ_TRANSFORMS_SUPPORTED PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); +#endif #ifdef PNG_PROGRESSIVE_READ_SUPPORTED PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, - png_infop info_ptr)); + png_infop info_ptr)); PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, - png_infop info_ptr)); + png_infop info_ptr)); PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, - png_uint_32 length)); + png_uint_32 length)); PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); + png_bytep buffer, png_size_t buffer_length)); PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); + png_bytep buffer, png_size_t buffer_length)); PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); @@ -770,185 +1226,359 @@ PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, png_infop info_ptr)); PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); + png_infop info_ptr)); PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, - png_infop info_ptr)); + png_infop info_ptr)); PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); -#ifdef PNG_READ_tEXt_SUPPORTED +# ifdef PNG_READ_tEXt_SUPPORTED PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); + png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif -#ifdef PNG_READ_zTXt_SUPPORTED + png_infop info_ptr)); +# endif +# ifdef PNG_READ_zTXt_SUPPORTED PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); + png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif -#ifdef PNG_READ_iTXt_SUPPORTED + png_infop info_ptr)); +# endif +# ifdef PNG_READ_iTXt_SUPPORTED PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); + png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif + png_infop info_ptr)); +# endif #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ #ifdef PNG_MNG_FEATURES_SUPPORTED PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); + png_bytep row)); PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); + png_bytep row)); #endif /* Added at libpng version 1.4.0 */ -#ifdef PNG_cHRM_SUPPORTED +#ifdef PNG_CHECK_cHRM_SUPPORTED PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); + png_fixed_point int_white_x, png_fixed_point int_white_y, + png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point + int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)); #endif -#ifdef PNG_cHRM_SUPPORTED #ifdef PNG_CHECK_cHRM_SUPPORTED /* Added at libpng version 1.2.34 and 1.4.0 */ +/* Currently only used by png_check_cHRM_fixed */ PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, - unsigned long *hi_product, unsigned long *lo_product)); + unsigned long *hi_product, unsigned long *lo_product)); #endif + +#ifdef PNG_cHRM_SUPPORTED +/* Added at libpng version 1.5.5 */ +typedef struct png_xy +{ + png_fixed_point redx, redy; + png_fixed_point greenx, greeny; + png_fixed_point bluex, bluey; + png_fixed_point whitex, whitey; +} png_xy; + +typedef struct png_XYZ +{ + png_fixed_point redX, redY, redZ; + png_fixed_point greenX, greenY, greenZ; + png_fixed_point blueX, blueY, blueZ; +} png_XYZ; + +/* The conversion APIs return 0 on success, non-zero on a parameter error. They + * allow conversion between the above representations of a color encoding. When + * converting from XYZ end points to chromaticities the absolute magnitude of + * the end points is lost, when converting back the sum of the Y values of the + * three end points will be 1.0 + */ +PNG_EXTERN int png_xy_from_XYZ PNGARG((png_xy *xy, png_XYZ XYZ)); +PNG_EXTERN int png_XYZ_from_xy PNGARG((png_XYZ *XYZ, png_xy xy)); +PNG_EXTERN int png_XYZ_from_xy_checked PNGARG((png_structp png_ptr, + png_XYZ *XYZ, png_xy xy)); #endif /* Added at libpng version 1.4.0 */ PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, - int filter_type)); + png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_type, int compression_type, + int filter_type)); /* Free all memory used by the read (old method - NOT DLL EXPORTED) */ -PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr, - png_infop end_info_ptr)); +PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr, + png_infop info_ptr, png_infop end_info_ptr)); /* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr)); #ifdef USE_FAR_KEYWORD /* memory model conversion function */ -PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr, - int check)); +PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr, + int check)); #endif /* USE_FAR_KEYWORD */ -/* Define PNG_DEBUG at compile time for debugging information. Higher - * numbers for PNG_DEBUG mean more debugging information. This has - * only been added since version 0.95 so it is not implemented throughout - * libpng yet, but more support will be added as needed. - */ -#ifdef PNG_DEBUG -#if (PNG_DEBUG > 0) -#if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER) -#include -#if (PNG_DEBUG > 1) -#ifndef _DEBUG -# define _DEBUG -#endif -#ifndef png_debug -#define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE) -#endif -#ifndef png_debug1 -#define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1) -#endif -#ifndef png_debug2 -#define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2) -#endif -#endif -#else /* PNG_DEBUG_FILE || !_MSC_VER */ -#ifndef PNG_DEBUG_FILE -#define PNG_DEBUG_FILE stderr -#endif /* PNG_DEBUG_FILE */ - -#if (PNG_DEBUG > 1) -/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on - * non-ISO compilers - */ -# ifdef __STDC__ -# ifndef png_debug -# define png_debug(l,m) \ - { \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ - } -# endif -# ifndef png_debug1 -# define png_debug1(l,m,p1) \ - { \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ - } -# endif -# ifndef png_debug2 -# define png_debug2(l,m,p1,p2) \ - { \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ - } -# endif -# else /* __STDC __ */ -# ifndef png_debug -# define png_debug(l,m) \ - { \ - int num_tabs=l; \ - char format[256]; \ - snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ - m,PNG_STRING_NEWLINE); \ - fprintf(PNG_DEBUG_FILE,format); \ - } -# endif -# ifndef png_debug1 -# define png_debug1(l,m,p1) \ - { \ - int num_tabs=l; \ - char format[256]; \ - snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ - m,PNG_STRING_NEWLINE); \ - fprintf(PNG_DEBUG_FILE,format,p1); \ - } -# endif -# ifndef png_debug2 -# define png_debug2(l,m,p1,p2) \ - { \ - int num_tabs=l; \ - char format[256]; \ - snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ - m,PNG_STRING_NEWLINE); \ - fprintf(PNG_DEBUG_FILE,format,p1,p2); \ - } -# endif -# endif /* __STDC __ */ -#endif /* (PNG_DEBUG > 1) */ +#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) +PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr, + png_const_charp name),PNG_NORETURN); +#endif + +/* Puts 'string' into 'buffer' at buffer[pos], taking care never to overwrite + * the end. Always leaves the buffer nul terminated. Never errors out (and + * there is no error code.) + */ +PNG_EXTERN size_t png_safecat(png_charp buffer, size_t bufsize, size_t pos, + png_const_charp string); + +/* Various internal functions to handle formatted warning messages, currently + * only implemented for warnings. + */ +#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED) +/* Utility to dump an unsigned value into a buffer, given a start pointer and + * and end pointer (which should point just *beyond* the end of the buffer!) + * Returns the pointer to the start of the formatted string. This utility only + * does unsigned values. + */ +PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end, + int format, png_alloc_size_t number); + +/* Convenience macro that takes an array: */ +#define PNG_FORMAT_NUMBER(buffer,format,number) \ + png_format_number(buffer, buffer + (sizeof buffer), format, number) + +/* Suggested size for a number buffer (enough for 64 bits and a sign!) */ +#define PNG_NUMBER_BUFFER_SIZE 24 + +/* These are the integer formats currently supported, the name is formed from + * the standard printf(3) format string. + */ +#define PNG_NUMBER_FORMAT_u 1 /* chose unsigned API! */ +#define PNG_NUMBER_FORMAT_02u 2 +#define PNG_NUMBER_FORMAT_d 1 /* chose signed API! */ +#define PNG_NUMBER_FORMAT_02d 2 +#define PNG_NUMBER_FORMAT_x 3 +#define PNG_NUMBER_FORMAT_02x 4 +#define PNG_NUMBER_FORMAT_fixed 5 /* choose the signed API */ +#endif + +#ifdef PNG_WARNINGS_SUPPORTED +/* New defines and members adding in libpng-1.5.4 */ +# define PNG_WARNING_PARAMETER_SIZE 32 +# define PNG_WARNING_PARAMETER_COUNT 8 + +/* An l-value of this type has to be passed to the APIs below to cache the + * values of the parameters to a formatted warning message. + */ +typedef char png_warning_parameters[PNG_WARNING_PARAMETER_COUNT][ + PNG_WARNING_PARAMETER_SIZE]; + +PNG_EXTERN void png_warning_parameter(png_warning_parameters p, int number, + png_const_charp string); + /* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters, + * including the trailing '\0'. + */ +PNG_EXTERN void png_warning_parameter_unsigned(png_warning_parameters p, + int number, int format, png_alloc_size_t value); + /* Use png_alloc_size_t because it is an unsigned type as big as any we + * need to output. Use the following for a signed value. + */ +PNG_EXTERN void png_warning_parameter_signed(png_warning_parameters p, + int number, int format, png_int_32 value); + +PNG_EXTERN void png_formatted_warning(png_structp png_ptr, + png_warning_parameters p, png_const_charp message); + /* 'message' follows the X/Open approach of using @1, @2 to insert + * parameters previously supplied using the above functions. Errors in + * specifying the paramters will simple result in garbage substitutions. + */ +#endif + +/* ASCII to FP interfaces, currently only implemented if sCAL + * support is required. + */ +#if defined(PNG_READ_sCAL_SUPPORTED) +/* MAX_DIGITS is actually the maximum number of characters in an sCAL + * width or height, derived from the precision (number of significant + * digits - a build time settable option) and assumpitions about the + * maximum ridiculous exponent. + */ +#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/) + +#ifdef PNG_FLOATING_POINT_SUPPORTED +PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii, + png_size_t size, double fp, unsigned int precision)); +#endif /* FLOATING_POINT */ + +#ifdef PNG_FIXED_POINT_SUPPORTED +PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr, + png_charp ascii, png_size_t size, png_fixed_point fp)); +#endif /* FIXED_POINT */ +#endif /* READ_sCAL */ + +#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) +/* An internal API to validate the format of a floating point number. + * The result is the index of the next character. If the number is + * not valid it will be the index of a character in the supposed number. + * + * The format of a number is defined in the PNG extensions specification + * and this API is strictly conformant to that spec, not anyone elses! + * + * The format as a regular expression is: + * + * [+-]?[0-9]+.?([Ee][+-]?[0-9]+)? + * + * or: + * + * [+-]?.[0-9]+(.[0-9]+)?([Ee][+-]?[0-9]+)? + * + * The complexity is that either integer or fraction must be present and the + * fraction is permitted to have no digits only if the integer is present. + * + * NOTE: The dangling E problem. + * There is a PNG valid floating point number in the following: + * + * PNG floating point numb1.ers are not greedy. + * + * Working this out requires *TWO* character lookahead (because of the + * sign), the parser does not do this - it will fail at the 'r' - this + * doesn't matter for PNG sCAL chunk values, but it requires more care + * if the value were ever to be embedded in something more complex. Use + * ANSI-C strtod if you need the lookahead. + */ +/* State table for the parser. */ +#define PNG_FP_INTEGER 0 /* before or in integer */ +#define PNG_FP_FRACTION 1 /* before or in fraction */ +#define PNG_FP_EXPONENT 2 /* before or in exponent */ +#define PNG_FP_STATE 3 /* mask for the above */ +#define PNG_FP_SAW_SIGN 4 /* Saw +/- in current state */ +#define PNG_FP_SAW_DIGIT 8 /* Saw a digit in current state */ +#define PNG_FP_SAW_DOT 16 /* Saw a dot in current state */ +#define PNG_FP_SAW_E 32 /* Saw an E (or e) in current state */ +#define PNG_FP_SAW_ANY 60 /* Saw any of the above 4 */ + +/* These three values don't affect the parser. They are set but not used. + */ +#define PNG_FP_WAS_VALID 64 /* Preceding substring is a valid fp number */ +#define PNG_FP_NEGATIVE 128 /* A negative number, including "-0" */ +#define PNG_FP_NONZERO 256 /* A non-zero value */ +#define PNG_FP_STICKY 448 /* The above three flags */ -#endif /* _MSC_VER */ -#endif /* (PNG_DEBUG > 0) */ -#endif /* PNG_DEBUG */ -#ifndef png_debug -#define png_debug(l, m) +/* This is available for the caller to store in 'state' if required. Do not + * call the parser after setting it (the parser sometimes clears it.) + */ +#define PNG_FP_INVALID 512 /* Available for callers as a distinct value */ + +/* Result codes for the parser (boolean - true meants ok, false means + * not ok yet.) + */ +#define PNG_FP_MAYBE 0 /* The number may be valid in the future */ +#define PNG_FP_OK 1 /* The number is valid */ + +/* Tests on the sticky non-zero and negative flags. To pass these checks + * the state must also indicate that the whole number is valid - this is + * achieved by testing PNG_FP_SAW_DIGIT (see the implementation for why this + * is equivalent to PNG_FP_OK above.) + */ +#define PNG_FP_NZ_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NEGATIVE | PNG_FP_NONZERO) + /* NZ_MASK: the string is valid and a non-zero negative value */ +#define PNG_FP_Z_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NONZERO) + /* Z MASK: the string is valid and a non-zero value. */ + /* PNG_FP_SAW_DIGIT: the string is valid. */ +#define PNG_FP_IS_ZERO(state) (((state) & PNG_FP_Z_MASK) == PNG_FP_SAW_DIGIT) +#define PNG_FP_IS_POSITIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_Z_MASK) +#define PNG_FP_IS_NEGATIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK) + +/* The actual parser. This can be called repeatedly, it updates + * the index into the string and the state variable (which must + * be initialzed to 0). It returns a result code, as above. There + * is no point calling the parser any more if it fails to advance to + * the end of the string - it is stuck on an invalid character (or + * terminated by '\0'). + * + * Note that the pointer will consume an E or even an E+ then leave + * a 'maybe' state even though a preceding integer.fraction is valid. + * The PNG_FP_WAS_VALID flag indicates that a preceding substring was + * a valid number. It's possible to recover from this by calling + * the parser again (from the start, with state 0) but with a string + * that omits the last character (i.e. set the size to the index of + * the problem character.) This has not been tested within libpng. + */ +PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string, + png_size_t size, int *statep, png_size_tp whereami)); + +/* This is the same but it checks a complete string and returns true + * only if it just contains a floating point number. As of 1.5.4 this + * function also returns the state at the end of parsing the number if + * it was valid (otherwise it returns 0.) This can be used for testing + * for negative or zero values using the sticky flag. + */ +PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string, + png_size_t size)); +#endif /* pCAL || sCAL */ + +#if defined(PNG_READ_GAMMA_SUPPORTED) ||\ + defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED) +/* Added at libpng version 1.5.0 */ +/* This is a utility to provide a*times/div (rounded) and indicate + * if there is an overflow. The result is a boolean - false (0) + * for overflow, true (1) if no overflow, in which case *res + * holds the result. + */ +PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a, + png_int_32 multiplied_by, png_int_32 divided_by)); #endif -#ifndef png_debug1 -#define png_debug1(l, m, p1) + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) +/* Same deal, but issue a warning on overflow and return 0. */ +PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr, + png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by)); #endif -#ifndef png_debug2 -#define png_debug2(l, m, p1, p2) + +#ifdef PNG_READ_GAMMA_SUPPORTED +/* Calculate a reciprocal - used for gamma values. This returns + * 0 if the argument is 0 in order to maintain an undefined value, + * there are no warnings. + */ +PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a)); + +/* The same but gives a reciprocal of the product of two fixed point + * values. Accuracy is suitable for gamma calculations but this is + * not exact - use png_muldiv for that. + */ +PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a, + png_fixed_point b)); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED +/* Internal fixed point gamma correction. These APIs are called as + * required to convert single values - they don't need to be fast, + * they are not used when processing image pixel values. + * + * While the input is an 'unsigned' value it must actually be the + * correct bit value - 0..255 or 0..65535 as required. + */ +PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr, + unsigned int value, png_fixed_point gamma_value)); +PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value)); +PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value, + png_fixed_point gamma_value)); +PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value, + png_fixed_point gamma_value)); +PNG_EXTERN void png_destroy_gamma_table(png_structp png_ptr); +PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, + int bit_depth)); #endif /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ + +#include "pngdebug.h" + #ifdef __cplusplus } #endif -#endif /* PNG_VERSION_INFO_ONLY */ #endif /* PNGPRIV_H */ diff --git a/src/png/pngread.c b/src/png/pngread.c index 92060d2bc6..7599206bfd 100644 --- a/src/png/pngread.c +++ b/src/png/pngread.c @@ -1,8 +1,8 @@ /* pngread.c - read a PNG file * - * Last changed in libpng 1.4.1 [February 25, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -14,30 +14,28 @@ * read a PNG file or stream. */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_READ_SUPPORTED #include "pngpriv.h" +#ifdef PNG_READ_SUPPORTED /* Create a PNG structure for reading, and allocate any memory needed. */ -png_structp PNGAPI -png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn) +PNG_FUNCTION(png_structp,PNGAPI +png_create_read_struct,(png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) { #ifdef PNG_USER_MEM_SUPPORTED return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); + warn_fn, NULL, NULL, NULL)); } /* Alternate create PNG structure for reading, and allocate any memory * needed. */ -png_structp PNGAPI -png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn) +PNG_FUNCTION(png_structp,PNGAPI +png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) { #endif /* PNG_USER_MEM_SUPPORTED */ @@ -49,17 +47,15 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, #ifdef PNG_SETJMP_SUPPORTED #ifdef USE_FAR_KEYWORD - jmp_buf jmpbuf; + jmp_buf tmp_jmpbuf; #endif #endif - int i; - png_debug(1, "in png_create_read_struct"); #ifdef PNG_USER_MEM_SUPPORTED png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - malloc_fn, mem_ptr); + malloc_fn, mem_ptr); #else png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); #endif @@ -70,10 +66,12 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, #ifdef PNG_USER_LIMITS_SUPPORTED png_ptr->user_width_max = PNG_USER_WIDTH_MAX; png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; + # ifdef PNG_USER_CHUNK_CACHE_MAX /* Added at libpng-1.2.43 and 1.4.0 */ png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; # endif + # ifdef PNG_SET_USER_CHUNK_MALLOC_MAX /* Added at libpng-1.2.43 and 1.4.1 */ png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; @@ -85,13 +83,13 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, encounter a png_error() will longjmp here. Since the jmpbuf is then meaningless we abort instead of returning. */ #ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) + if (setjmp(tmp_jmpbuf)) #else if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */ #endif PNG_ABORT(); #ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(png_ptr), jmpbuf, png_sizeof(jmp_buf)); + png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); #endif #endif /* PNG_SETJMP_SUPPORTED */ @@ -101,63 +99,20 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - if (user_png_ver) - { - i = 0; - do - { - if (user_png_ver[i] != png_libpng_ver[i]) - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; - } while (png_libpng_ver[i++]); - } - else - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; - - - if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) - { - /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so - * we must recompile any applications that use any older library version. - * For versions after libpng 1.0, we will be compatible, so we need - * only check the first digit. - */ - if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || - (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) || - (user_png_ver[0] == '0' && user_png_ver[2] < '9')) - { -#ifdef PNG_STDIO_SUPPORTED - char msg[80]; - if (user_png_ver) - { - png_snprintf(msg, 80, - "Application was compiled with png.h from libpng-%.20s", - user_png_ver); - png_warning(png_ptr, msg); - } - png_snprintf(msg, 80, - "Application is running with png.c from libpng-%.20s", - png_libpng_ver); - png_warning(png_ptr, msg); -#endif -#ifdef PNG_ERROR_NUMBERS_SUPPORTED - png_ptr->flags = 0; -#endif - png_warning(png_ptr, - "Incompatible libpng version in application and library"); - - png_cleanup_needed = 1; - } - } + /* Call the general version checker (shared with read and write code): */ + if (!png_user_version_check(png_ptr, user_png_ver)) + png_cleanup_needed = 1; if (!png_cleanup_needed) { /* Initialize zbuf - compression buffer */ png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, - png_ptr->zbuf_size); + png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size); + if (png_ptr->zbuf == NULL) - png_cleanup_needed = 1; + png_cleanup_needed = 1; } + png_ptr->zstream.zalloc = png_zalloc; png_ptr->zstream.zfree = png_zfree; png_ptr->zstream.opaque = (voidpf)png_ptr; @@ -166,12 +121,24 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, { switch (inflateInit(&png_ptr->zstream)) { - case Z_OK: /* Do nothing */ break; + case Z_OK: + break; /* Do nothing */ + case Z_MEM_ERROR: - case Z_STREAM_ERROR: png_warning(png_ptr, "zlib memory error"); - png_cleanup_needed = 1; break; - case Z_VERSION_ERROR: png_warning(png_ptr, "zlib version error"); - png_cleanup_needed = 1; break; + png_warning(png_ptr, "zlib memory error"); + png_cleanup_needed = 1; + break; + + case Z_STREAM_ERROR: + png_warning(png_ptr, "zlib stream error"); + png_cleanup_needed = 1; + break; + + case Z_VERSION_ERROR: + png_warning(png_ptr, "zlib version error"); + png_cleanup_needed = 1; + break; + default: png_warning(png_ptr, "Unknown zlib error"); png_cleanup_needed = 1; } @@ -184,7 +151,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, png_ptr->zbuf = NULL; #ifdef PNG_USER_MEM_SUPPORTED png_destroy_struct_2((png_voidp)png_ptr, - (png_free_ptr)free_fn, (png_voidp)mem_ptr); + (png_free_ptr)free_fn, (png_voidp)mem_ptr); #else png_destroy_struct((png_voidp)png_ptr); #endif @@ -214,207 +181,158 @@ void PNGAPI png_read_info(png_structp png_ptr, png_infop info_ptr) { png_debug(1, "in png_read_info"); - + if (png_ptr == NULL || info_ptr == NULL) return; - - /* If we haven't checked all of the PNG signature bytes, do so now. */ - if (png_ptr->sig_bytes < 8) - { - png_size_t num_checked = png_ptr->sig_bytes, - num_to_check = 8 - num_checked; - -#ifdef PNG_IO_STATE_SUPPORTED - png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE; -#endif - - png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check); - png_ptr->sig_bytes = 8; - if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) - { - if (num_checked < 4 && - png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) - png_error(png_ptr, "Not a PNG file"); - else - png_error(png_ptr, "PNG file corrupted by ASCII conversion"); - } - if (num_checked < 3) - png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE; - } + /* Read and check the PNG file signature. */ + png_read_sig(png_ptr, info_ptr); for (;;) { - PNG_IHDR; - PNG_IDAT; - PNG_IEND; - PNG_PLTE; -#ifdef PNG_READ_bKGD_SUPPORTED - PNG_bKGD; -#endif -#ifdef PNG_READ_cHRM_SUPPORTED - PNG_cHRM; -#endif -#ifdef PNG_READ_gAMA_SUPPORTED - PNG_gAMA; -#endif -#ifdef PNG_READ_hIST_SUPPORTED - PNG_hIST; -#endif -#ifdef PNG_READ_iCCP_SUPPORTED - PNG_iCCP; -#endif -#ifdef PNG_READ_iTXt_SUPPORTED - PNG_iTXt; -#endif -#ifdef PNG_READ_oFFs_SUPPORTED - PNG_oFFs; -#endif -#ifdef PNG_READ_pCAL_SUPPORTED - PNG_pCAL; -#endif -#ifdef PNG_READ_pHYs_SUPPORTED - PNG_pHYs; -#endif -#ifdef PNG_READ_sBIT_SUPPORTED - PNG_sBIT; -#endif -#ifdef PNG_READ_sCAL_SUPPORTED - PNG_sCAL; -#endif -#ifdef PNG_READ_sPLT_SUPPORTED - PNG_sPLT; -#endif -#ifdef PNG_READ_sRGB_SUPPORTED - PNG_sRGB; -#endif -#ifdef PNG_READ_tEXt_SUPPORTED - PNG_tEXt; -#endif -#ifdef PNG_READ_tIME_SUPPORTED - PNG_tIME; -#endif -#ifdef PNG_READ_tRNS_SUPPORTED - PNG_tRNS; -#endif -#ifdef PNG_READ_zTXt_SUPPORTED - PNG_zTXt; -#endif png_uint_32 length = png_read_chunk_header(png_ptr); - PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; + png_uint_32 chunk_name = png_ptr->chunk_name; /* This should be a binary subdivision search or a hash for * matching the chunk name rather than a linear search. */ - if (!png_memcmp(chunk_name, png_IDAT, 4)) - if (png_ptr->mode & PNG_AFTER_IDAT) - png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; + if (chunk_name == png_IDAT) + if (png_ptr->mode & PNG_AFTER_IDAT) + png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; - if (!png_memcmp(chunk_name, png_IHDR, 4)) + if (chunk_name == png_IHDR) png_handle_IHDR(png_ptr, info_ptr, length); - else if (!png_memcmp(chunk_name, png_IEND, 4)) + + else if (chunk_name == png_IEND) png_handle_IEND(png_ptr, info_ptr, length); + #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_handle_as_unknown(png_ptr, chunk_name)) + else if (png_chunk_unknown_handling(png_ptr, chunk_name) != + PNG_HANDLE_CHUNK_AS_DEFAULT) { - if (!png_memcmp(chunk_name, png_IDAT, 4)) + if (chunk_name == png_IDAT) png_ptr->mode |= PNG_HAVE_IDAT; + png_handle_unknown(png_ptr, info_ptr, length); - if (!png_memcmp(chunk_name, png_PLTE, 4)) + + if (chunk_name == png_PLTE) png_ptr->mode |= PNG_HAVE_PLTE; - else if (!png_memcmp(chunk_name, png_IDAT, 4)) + + else if (chunk_name == png_IDAT) { if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before IDAT"); + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) + !(png_ptr->mode & PNG_HAVE_PLTE)) png_error(png_ptr, "Missing PLTE before IDAT"); + break; } } #endif - else if (!png_memcmp(chunk_name, png_PLTE, 4)) + else if (chunk_name == png_PLTE) png_handle_PLTE(png_ptr, info_ptr, length); - else if (!png_memcmp(chunk_name, png_IDAT, 4)) + + else if (chunk_name == png_IDAT) { if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before IDAT"); + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) + !(png_ptr->mode & PNG_HAVE_PLTE)) png_error(png_ptr, "Missing PLTE before IDAT"); png_ptr->idat_size = length; png_ptr->mode |= PNG_HAVE_IDAT; break; } + #ifdef PNG_READ_bKGD_SUPPORTED - else if (!png_memcmp(chunk_name, png_bKGD, 4)) + else if (chunk_name == png_bKGD) png_handle_bKGD(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_cHRM_SUPPORTED - else if (!png_memcmp(chunk_name, png_cHRM, 4)) + else if (chunk_name == png_cHRM) png_handle_cHRM(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_gAMA_SUPPORTED - else if (!png_memcmp(chunk_name, png_gAMA, 4)) + else if (chunk_name == png_gAMA) png_handle_gAMA(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_hIST_SUPPORTED - else if (!png_memcmp(chunk_name, png_hIST, 4)) + else if (chunk_name == png_hIST) png_handle_hIST(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_oFFs_SUPPORTED - else if (!png_memcmp(chunk_name, png_oFFs, 4)) + else if (chunk_name == png_oFFs) png_handle_oFFs(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_pCAL_SUPPORTED - else if (!png_memcmp(chunk_name, png_pCAL, 4)) + else if (chunk_name == png_pCAL) png_handle_pCAL(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_sCAL_SUPPORTED - else if (!png_memcmp(chunk_name, png_sCAL, 4)) + else if (chunk_name == png_sCAL) png_handle_sCAL(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_pHYs_SUPPORTED - else if (!png_memcmp(chunk_name, png_pHYs, 4)) + else if (chunk_name == png_pHYs) png_handle_pHYs(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_sBIT_SUPPORTED - else if (!png_memcmp(chunk_name, png_sBIT, 4)) + else if (chunk_name == png_sBIT) png_handle_sBIT(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_sRGB_SUPPORTED - else if (!png_memcmp(chunk_name, png_sRGB, 4)) + else if (chunk_name == png_sRGB) png_handle_sRGB(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_iCCP_SUPPORTED - else if (!png_memcmp(chunk_name, png_iCCP, 4)) + else if (chunk_name == png_iCCP) png_handle_iCCP(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_sPLT_SUPPORTED - else if (!png_memcmp(chunk_name, png_sPLT, 4)) + else if (chunk_name == png_sPLT) png_handle_sPLT(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_tEXt_SUPPORTED - else if (!png_memcmp(chunk_name, png_tEXt, 4)) + else if (chunk_name == png_tEXt) png_handle_tEXt(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_tIME_SUPPORTED - else if (!png_memcmp(chunk_name, png_tIME, 4)) + else if (chunk_name == png_tIME) png_handle_tIME(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_tRNS_SUPPORTED - else if (!png_memcmp(chunk_name, png_tRNS, 4)) + else if (chunk_name == png_tRNS) png_handle_tRNS(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_zTXt_SUPPORTED - else if (!png_memcmp(chunk_name, png_zTXt, 4)) + else if (chunk_name == png_zTXt) png_handle_zTXt(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_iTXt_SUPPORTED - else if (!png_memcmp(chunk_name, png_iTXt, 4)) + else if (chunk_name == png_iTXt) png_handle_iTXt(png_ptr, info_ptr, length); #endif + else png_handle_unknown(png_ptr, info_ptr, length); } @@ -426,16 +344,17 @@ void PNGAPI png_read_update_info(png_structp png_ptr, png_infop info_ptr) { png_debug(1, "in png_read_update_info"); - + if (png_ptr == NULL) return; - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - png_read_start_row(png_ptr); - else - png_warning(png_ptr, - "Ignoring extra png_read_update_info() call; row buffer not reallocated"); + png_read_start_row(png_ptr); + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED png_read_transform_info(png_ptr, info_ptr); +#else + PNG_UNUSED(info_ptr) +#endif } #ifdef PNG_SEQUENTIAL_READ_SUPPORTED @@ -448,11 +367,9 @@ void PNGAPI png_start_read_image(png_structp png_ptr) { png_debug(1, "in png_start_read_image"); - - if (png_ptr == NULL) - return; - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - png_read_start_row(png_ptr); + + if (png_ptr != NULL) + png_read_start_row(png_ptr); } #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ @@ -460,20 +377,30 @@ png_start_read_image(png_structp png_ptr) void PNGAPI png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) { - PNG_IDAT; - PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, - 0xff}; - PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; int ret; - + + png_row_info row_info; + if (png_ptr == NULL) return; - + png_debug2(1, "in png_read_row (row %lu, pass %d)", - (unsigned long) png_ptr->row_number, png_ptr->pass); + (unsigned long)png_ptr->row_number, png_ptr->pass); + /* png_read_start_row sets the information (in particular iwidth) for this + * interlace pass. + */ if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) png_read_start_row(png_ptr); + + /* 1.5.6: row_info moved out of png_struct to a local here. */ + row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */ + row_info.color_type = png_ptr->color_type; + row_info.bit_depth = png_ptr->bit_depth; + row_info.channels = png_ptr->channels; + row_info.pixel_depth = png_ptr->pixel_depth; + row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width); + if (png_ptr->row_number == 0 && png_ptr->pass == 0) { /* Check for transforms that have been set but were defined out */ @@ -481,27 +408,33 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if (png_ptr->transformations & PNG_INVERT_MONO) png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined"); #endif + #if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED) if (png_ptr->transformations & PNG_FILLER) png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined"); #endif + #if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \ !defined(PNG_READ_PACKSWAP_SUPPORTED) if (png_ptr->transformations & PNG_PACKSWAP) png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined"); #endif + #if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED) if (png_ptr->transformations & PNG_PACK) png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined"); #endif + #if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) if (png_ptr->transformations & PNG_SHIFT) png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined"); #endif + #if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED) if (png_ptr->transformations & PNG_BGR) png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined"); #endif + #if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED) if (png_ptr->transformations & PNG_SWAP_BYTES) png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined"); @@ -509,7 +442,12 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) } #ifdef PNG_READ_INTERLACING_SUPPORTED - /* If interlaced and we do not need a new row, combine row and return */ + /* If interlaced and we do not need a new row, combine row and return. + * Notice that the pixels we have from previous rows have been transformed + * already; we can only combine like with like (transformed or + * untransformed) and, because of the libpng API for interlaced images, this + * means we must transform before de-interlacing. + */ if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) { switch (png_ptr->pass) @@ -518,48 +456,51 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if (png_ptr->row_number & 0x07) { if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); + png_combine_row(png_ptr, dsp_row, 1/*display*/); png_read_finish_row(png_ptr); return; } break; + case 1: if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) { if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); + png_combine_row(png_ptr, dsp_row, 1/*display*/); + png_read_finish_row(png_ptr); return; } break; + case 2: if ((png_ptr->row_number & 0x07) != 4) { if (dsp_row != NULL && (png_ptr->row_number & 4)) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); + png_combine_row(png_ptr, dsp_row, 1/*display*/); + png_read_finish_row(png_ptr); return; } break; + case 3: if ((png_ptr->row_number & 3) || png_ptr->width < 3) { if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); + png_combine_row(png_ptr, dsp_row, 1/*display*/); + png_read_finish_row(png_ptr); return; } break; + case 4: if ((png_ptr->row_number & 3) != 2) { if (dsp_row != NULL && (png_ptr->row_number & 2)) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); + png_combine_row(png_ptr, dsp_row, 1/*display*/); + png_read_finish_row(png_ptr); return; } @@ -568,12 +509,14 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if ((png_ptr->row_number & 1) || png_ptr->width < 2) { if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); + png_combine_row(png_ptr, dsp_row, 1/*display*/); + png_read_finish_row(png_ptr); return; } break; + + default: case 6: if (!(png_ptr->row_number & 1)) { @@ -592,6 +535,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) png_ptr->zstream.avail_out = (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1); + do { if (!(png_ptr->zstream.avail_in)) @@ -601,7 +545,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) png_crc_finish(png_ptr, 0); png_ptr->idat_size = png_read_chunk_header(png_ptr); - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + if (png_ptr->chunk_name != png_IDAT) png_error(png_ptr, "Not enough image data"); } png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; @@ -609,10 +553,12 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if (png_ptr->zbuf_size > png_ptr->idat_size) png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; png_crc_read(png_ptr, png_ptr->zbuf, - (png_size_t)png_ptr->zstream.avail_in); + (png_size_t)png_ptr->zstream.avail_in); png_ptr->idat_size -= png_ptr->zstream.avail_in; } + ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); + if (ret == Z_STREAM_END) { if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in || @@ -622,39 +568,54 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; break; } + if (ret != Z_OK) png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression error"); + "Decompression error"); } while (png_ptr->zstream.avail_out); - png_ptr->row_info.color_type = png_ptr->color_type; - png_ptr->row_info.width = png_ptr->iwidth; - png_ptr->row_info.channels = png_ptr->channels; - png_ptr->row_info.bit_depth = png_ptr->bit_depth; - png_ptr->row_info.pixel_depth = png_ptr->pixel_depth; - png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth, - png_ptr->row_info.width); - - if (png_ptr->row_buf[0]) - png_read_filter_row(png_ptr, &(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->prev_row + 1, - (int)(png_ptr->row_buf[0])); + if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE) + { + if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST) + png_read_filter_row(&row_info, png_ptr->row_buf + 1, + png_ptr->prev_row + 1, png_ptr->row_buf[0]); + else + png_error(png_ptr, "bad adaptive filter value"); + } - png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1); + /* libpng 1.5.6: the following line was copying png_ptr->rowbytes before + * 1.5.6, while the buffer really is this big in current versions of libpng + * it may not be in the future, so this was changed just to copy the + * interlaced count: + */ + png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); #ifdef PNG_MNG_FEATURES_SUPPORTED if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) + (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) { /* Intrapixel differencing */ - png_do_read_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_read_intrapixel(&row_info, png_ptr->row_buf + 1); } #endif - if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA)) - png_do_read_transformations(png_ptr); +#ifdef PNG_READ_TRANSFORMS_SUPPORTED + if (png_ptr->transformations) + png_do_read_transformations(png_ptr, &row_info); +#endif + + /* The transformed pixel depth should match the depth now in row_info. */ + if (png_ptr->transformed_pixel_depth == 0) + { + png_ptr->transformed_pixel_depth = row_info.pixel_depth; + if (row_info.pixel_depth > png_ptr->maximum_pixel_depth) + png_error(png_ptr, "sequential row overflow"); + } + + else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth) + png_error(png_ptr, "internal sequential row size calculation error"); #ifdef PNG_READ_INTERLACING_SUPPORTED /* Blow up interlaced rows to full size */ @@ -662,26 +623,24 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) (png_ptr->transformations & PNG_INTERLACE)) { if (png_ptr->pass < 6) - /* Old interface (pre-1.0.9): - * png_do_read_interlace(&(png_ptr->row_info), - * png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations); - */ - png_do_read_interlace(png_ptr); + png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass, + png_ptr->transformations); if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); + png_combine_row(png_ptr, dsp_row, 1/*display*/); + if (row != NULL) - png_combine_row(png_ptr, row, - png_pass_mask[png_ptr->pass]); + png_combine_row(png_ptr, row, 0/*row*/); } + else #endif { if (row != NULL) - png_combine_row(png_ptr, row, 0xff); + png_combine_row(png_ptr, row, -1/*ignored*/); + if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, 0xff); + png_combine_row(png_ptr, dsp_row, -1/*ignored*/); } png_read_finish_row(png_ptr); @@ -717,16 +676,17 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) void PNGAPI png_read_rows(png_structp png_ptr, png_bytepp row, - png_bytepp display_row, png_uint_32 num_rows) + png_bytepp display_row, png_uint_32 num_rows) { png_uint_32 i; png_bytepp rp; png_bytepp dp; png_debug(1, "in png_read_rows"); - + if (png_ptr == NULL) return; + rp = row; dp = display_row; if (rp != NULL && dp != NULL) @@ -737,6 +697,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row, png_read_row(png_ptr, rptr, dptr); } + else if (rp != NULL) for (i = 0; i < num_rows; i++) { @@ -744,6 +705,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row, png_read_row(png_ptr, rptr, NULL); rp++; } + else if (dp != NULL) for (i = 0; i < num_rows; i++) { @@ -775,22 +737,45 @@ png_read_image(png_structp png_ptr, png_bytepp image) png_bytepp rp; png_debug(1, "in png_read_image"); - + if (png_ptr == NULL) return; #ifdef PNG_READ_INTERLACING_SUPPORTED - pass = png_set_interlace_handling(png_ptr); + if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) + { + pass = png_set_interlace_handling(png_ptr); + /* And make sure transforms are initialized. */ + png_start_read_image(png_ptr); + } + else + { + if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE)) + { + /* Caller called png_start_read_image or png_read_update_info without + * first turning on the PNG_INTERLACE transform. We can fix this here, + * but the caller should do it! + */ + png_warning(png_ptr, "Interlace handling should be turned on when " + "using png_read_image"); + /* Make sure this is set correctly */ + png_ptr->num_rows = png_ptr->height; + } + + /* Obtain the pass number, which also turns on the PNG_INTERLACE flag in + * the above error case. + */ + pass = png_set_interlace_handling(png_ptr); + } #else if (png_ptr->interlaced) png_error(png_ptr, - "Cannot read interlaced image -- interlace handler disabled"); + "Cannot read interlaced image -- interlace handler disabled"); + pass = 1; #endif - image_height=png_ptr->height; - png_ptr->num_rows = image_height; /* Make sure this is set correctly */ for (j = 0; j < pass; j++) { @@ -813,167 +798,136 @@ void PNGAPI png_read_end(png_structp png_ptr, png_infop info_ptr) { png_debug(1, "in png_read_end"); - + if (png_ptr == NULL) return; + png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ do { - PNG_IHDR; - PNG_IDAT; - PNG_IEND; - PNG_PLTE; -#ifdef PNG_READ_bKGD_SUPPORTED - PNG_bKGD; -#endif -#ifdef PNG_READ_cHRM_SUPPORTED - PNG_cHRM; -#endif -#ifdef PNG_READ_gAMA_SUPPORTED - PNG_gAMA; -#endif -#ifdef PNG_READ_hIST_SUPPORTED - PNG_hIST; -#endif -#ifdef PNG_READ_iCCP_SUPPORTED - PNG_iCCP; -#endif -#ifdef PNG_READ_iTXt_SUPPORTED - PNG_iTXt; -#endif -#ifdef PNG_READ_oFFs_SUPPORTED - PNG_oFFs; -#endif -#ifdef PNG_READ_pCAL_SUPPORTED - PNG_pCAL; -#endif -#ifdef PNG_READ_pHYs_SUPPORTED - PNG_pHYs; -#endif -#ifdef PNG_READ_sBIT_SUPPORTED - PNG_sBIT; -#endif -#ifdef PNG_READ_sCAL_SUPPORTED - PNG_sCAL; -#endif -#ifdef PNG_READ_sPLT_SUPPORTED - PNG_sPLT; -#endif -#ifdef PNG_READ_sRGB_SUPPORTED - PNG_sRGB; -#endif -#ifdef PNG_READ_tEXt_SUPPORTED - PNG_tEXt; -#endif -#ifdef PNG_READ_tIME_SUPPORTED - PNG_tIME; -#endif -#ifdef PNG_READ_tRNS_SUPPORTED - PNG_tRNS; -#endif -#ifdef PNG_READ_zTXt_SUPPORTED - PNG_zTXt; -#endif png_uint_32 length = png_read_chunk_header(png_ptr); - PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; + png_uint_32 chunk_name = png_ptr->chunk_name; - if (!png_memcmp(chunk_name, png_IHDR, 4)) + if (chunk_name == png_IHDR) png_handle_IHDR(png_ptr, info_ptr, length); - else if (!png_memcmp(chunk_name, png_IEND, 4)) + + else if (chunk_name == png_IEND) png_handle_IEND(png_ptr, info_ptr, length); + #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_handle_as_unknown(png_ptr, chunk_name)) + else if (png_chunk_unknown_handling(png_ptr, chunk_name) != + PNG_HANDLE_CHUNK_AS_DEFAULT) { - if (!png_memcmp(chunk_name, png_IDAT, 4)) + if (chunk_name == png_IDAT) { if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) png_benign_error(png_ptr, "Too many IDATs found"); } png_handle_unknown(png_ptr, info_ptr, length); - if (!png_memcmp(chunk_name, png_PLTE, 4)) + if (chunk_name == png_PLTE) png_ptr->mode |= PNG_HAVE_PLTE; } #endif - else if (!png_memcmp(chunk_name, png_IDAT, 4)) + + else if (chunk_name == png_IDAT) { /* Zero length IDATs are legal after the last IDAT has been * read, but not after other chunks have been read. */ if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) png_benign_error(png_ptr, "Too many IDATs found"); + png_crc_finish(png_ptr, length); } - else if (!png_memcmp(chunk_name, png_PLTE, 4)) + else if (chunk_name == png_PLTE) png_handle_PLTE(png_ptr, info_ptr, length); + #ifdef PNG_READ_bKGD_SUPPORTED - else if (!png_memcmp(chunk_name, png_bKGD, 4)) + else if (chunk_name == png_bKGD) png_handle_bKGD(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_cHRM_SUPPORTED - else if (!png_memcmp(chunk_name, png_cHRM, 4)) + else if (chunk_name == png_cHRM) png_handle_cHRM(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_gAMA_SUPPORTED - else if (!png_memcmp(chunk_name, png_gAMA, 4)) + else if (chunk_name == png_gAMA) png_handle_gAMA(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_hIST_SUPPORTED - else if (!png_memcmp(chunk_name, png_hIST, 4)) + else if (chunk_name == png_hIST) png_handle_hIST(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_oFFs_SUPPORTED - else if (!png_memcmp(chunk_name, png_oFFs, 4)) + else if (chunk_name == png_oFFs) png_handle_oFFs(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_pCAL_SUPPORTED - else if (!png_memcmp(chunk_name, png_pCAL, 4)) + else if (chunk_name == png_pCAL) png_handle_pCAL(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_sCAL_SUPPORTED - else if (!png_memcmp(chunk_name, png_sCAL, 4)) + else if (chunk_name == png_sCAL) png_handle_sCAL(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_pHYs_SUPPORTED - else if (!png_memcmp(chunk_name, png_pHYs, 4)) + else if (chunk_name == png_pHYs) png_handle_pHYs(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_sBIT_SUPPORTED - else if (!png_memcmp(chunk_name, png_sBIT, 4)) + else if (chunk_name == png_sBIT) png_handle_sBIT(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_sRGB_SUPPORTED - else if (!png_memcmp(chunk_name, png_sRGB, 4)) + else if (chunk_name == png_sRGB) png_handle_sRGB(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_iCCP_SUPPORTED - else if (!png_memcmp(chunk_name, png_iCCP, 4)) + else if (chunk_name == png_iCCP) png_handle_iCCP(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_sPLT_SUPPORTED - else if (!png_memcmp(chunk_name, png_sPLT, 4)) + else if (chunk_name == png_sPLT) png_handle_sPLT(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_tEXt_SUPPORTED - else if (!png_memcmp(chunk_name, png_tEXt, 4)) + else if (chunk_name == png_tEXt) png_handle_tEXt(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_tIME_SUPPORTED - else if (!png_memcmp(chunk_name, png_tIME, 4)) + else if (chunk_name == png_tIME) png_handle_tIME(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_tRNS_SUPPORTED - else if (!png_memcmp(chunk_name, png_tRNS, 4)) + else if (chunk_name == png_tRNS) png_handle_tRNS(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_zTXt_SUPPORTED - else if (!png_memcmp(chunk_name, png_zTXt, 4)) + else if (chunk_name == png_zTXt) png_handle_zTXt(png_ptr, info_ptr, length); #endif + #ifdef PNG_READ_iTXt_SUPPORTED - else if (!png_memcmp(chunk_name, png_iTXt, 4)) + else if (chunk_name == png_iTXt) png_handle_iTXt(png_ptr, info_ptr, length); #endif + else png_handle_unknown(png_ptr, info_ptr, length); } while (!(png_ptr->mode & PNG_HAVE_IEND)); @@ -983,7 +937,7 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) /* Free all memory used by the read */ void PNGAPI png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, - png_infopp end_info_ptr_ptr) + png_infopp end_info_ptr_ptr) { png_structp png_ptr = NULL; png_infop info_ptr = NULL, end_info_ptr = NULL; @@ -993,7 +947,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, #endif png_debug(1, "in png_destroy_read_struct"); - + if (png_ptr_ptr != NULL) png_ptr = *png_ptr_ptr; if (png_ptr == NULL) @@ -1034,7 +988,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, #endif #ifdef PNG_USER_MEM_SUPPORTED png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); + (png_voidp)mem_ptr); #else png_destroy_struct((png_voidp)end_info_ptr); #endif @@ -1062,88 +1016,55 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, jmp_buf tmp_jmp; #endif png_error_ptr error_fn; +#ifdef PNG_WARNINGS_SUPPORTED png_error_ptr warning_fn; +#endif png_voidp error_ptr; #ifdef PNG_USER_MEM_SUPPORTED png_free_ptr free_fn; #endif png_debug(1, "in png_read_destroy"); - + if (info_ptr != NULL) png_info_destroy(png_ptr, info_ptr); if (end_info_ptr != NULL) png_info_destroy(png_ptr, end_info_ptr); +#ifdef PNG_READ_GAMMA_SUPPORTED + png_destroy_gamma_table(png_ptr); +#endif + png_free(png_ptr, png_ptr->zbuf); png_free(png_ptr, png_ptr->big_row_buf); - png_free(png_ptr, png_ptr->prev_row); + png_free(png_ptr, png_ptr->big_prev_row); png_free(png_ptr, png_ptr->chunkdata); + #ifdef PNG_READ_QUANTIZE_SUPPORTED png_free(png_ptr, png_ptr->palette_lookup); png_free(png_ptr, png_ptr->quantize_index); #endif -#ifdef PNG_READ_GAMMA_SUPPORTED - png_free(png_ptr, png_ptr->gamma_table); -#endif -#ifdef PNG_READ_BACKGROUND_SUPPORTED - png_free(png_ptr, png_ptr->gamma_from_1); - png_free(png_ptr, png_ptr->gamma_to_1); -#endif + if (png_ptr->free_me & PNG_FREE_PLTE) png_zfree(png_ptr, png_ptr->palette); png_ptr->free_me &= ~PNG_FREE_PLTE; + #if defined(PNG_tRNS_SUPPORTED) || \ defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) if (png_ptr->free_me & PNG_FREE_TRNS) png_free(png_ptr, png_ptr->trans_alpha); png_ptr->free_me &= ~PNG_FREE_TRNS; #endif + #ifdef PNG_READ_hIST_SUPPORTED if (png_ptr->free_me & PNG_FREE_HIST) png_free(png_ptr, png_ptr->hist); png_ptr->free_me &= ~PNG_FREE_HIST; #endif -#ifdef PNG_READ_GAMMA_SUPPORTED - if (png_ptr->gamma_16_table != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_table[i]); - } - png_free(png_ptr, png_ptr->gamma_16_table); - } -#ifdef PNG_READ_BACKGROUND_SUPPORTED - if (png_ptr->gamma_16_from_1 != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_from_1[i]); - } - png_free(png_ptr, png_ptr->gamma_16_from_1); - } - if (png_ptr->gamma_16_to_1 != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_to_1[i]); - } - png_free(png_ptr, png_ptr->gamma_16_to_1); - } -#endif -#endif -#ifdef PNG_TIME_RFC1123_SUPPORTED - png_free(png_ptr, png_ptr->time_buffer); -#endif inflateEnd(&png_ptr->zstream); + #ifdef PNG_PROGRESSIVE_READ_SUPPORTED png_free(png_ptr, png_ptr->save_buffer); #endif @@ -1158,11 +1079,13 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, * being used again. */ #ifdef PNG_SETJMP_SUPPORTED - png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf)); + png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); #endif error_fn = png_ptr->error_fn; +#ifdef PNG_WARNINGS_SUPPORTED warning_fn = png_ptr->warning_fn; +#endif error_ptr = png_ptr->error_ptr; #ifdef PNG_USER_MEM_SUPPORTED free_fn = png_ptr->free_fn; @@ -1171,14 +1094,16 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_memset(png_ptr, 0, png_sizeof(png_struct)); png_ptr->error_fn = error_fn; +#ifdef PNG_WARNINGS_SUPPORTED png_ptr->warning_fn = warning_fn; +#endif png_ptr->error_ptr = error_ptr; #ifdef PNG_USER_MEM_SUPPORTED png_ptr->free_fn = free_fn; #endif #ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf)); + png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); #endif } @@ -1188,6 +1113,7 @@ png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn) { if (png_ptr == NULL) return; + png_ptr->read_row_fn = read_row_fn; } @@ -1201,7 +1127,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, { int row; - if (png_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL) return; /* png_read_info() gives us all of the information from the @@ -1213,8 +1139,22 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, /* -------------- image transformations start here ------------------- */ -#ifdef PNG_READ_16_TO_8_SUPPORTED - /* Tell libpng to strip 16 bit/color files down to 8 bits per color. +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + /* Tell libpng to strip 16-bit/color files down to 8 bits per color. + */ + if (transforms & PNG_TRANSFORM_SCALE_16) + { + /* Added at libpng-1.5.4. "strip_16" produces the same result that it + * did in earlier versions, while "scale_16" is now more accurate. + */ + png_set_scale_16(png_ptr); + } +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + /* If both SCALE and STRIP are required pngrtran will effectively cancel the + * latter by doing SCALE first. This is ok and allows apps not to check for + * which is supported to get the right answer. */ if (transforms & PNG_TRANSFORM_STRIP_16) png_set_strip_16(png_ptr); @@ -1283,44 +1223,50 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, #endif #ifdef PNG_READ_BGR_SUPPORTED - /* Flip the RGB pixels to BGR (or RGBA to BGRA) - */ + /* Flip the RGB pixels to BGR (or RGBA to BGRA) */ if (transforms & PNG_TRANSFORM_BGR) png_set_bgr(png_ptr); #endif #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED - /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) - */ + /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */ if (transforms & PNG_TRANSFORM_SWAP_ALPHA) - png_set_swap_alpha(png_ptr); + png_set_swap_alpha(png_ptr); #endif #ifdef PNG_READ_SWAP_SUPPORTED - /* Swap bytes of 16 bit files to least significant byte first - */ + /* Swap bytes of 16-bit files to least significant byte first */ if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) png_set_swap(png_ptr); #endif /* Added at libpng-1.2.41 */ #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - /* Invert the alpha channel from opacity to transparency - */ + /* Invert the alpha channel from opacity to transparency */ if (transforms & PNG_TRANSFORM_INVERT_ALPHA) - png_set_invert_alpha(png_ptr); + png_set_invert_alpha(png_ptr); #endif /* Added at libpng-1.2.41 */ #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - /* Expand grayscale image to RGB - */ + /* Expand grayscale image to RGB */ if (transforms & PNG_TRANSFORM_GRAY_TO_RGB) - png_set_gray_to_rgb(png_ptr); + png_set_gray_to_rgb(png_ptr); +#endif + +/* Added at libpng-1.5.4 */ +#ifdef PNG_READ_EXPAND_16_SUPPORTED + if (transforms & PNG_TRANSFORM_EXPAND_16) + png_set_expand_16(png_ptr); #endif /* We don't handle adding filler bytes */ + /* We use png_read_image and rely on that for interlace handling, but we also + * call png_read_update_info therefore must turn on interlace handling now: + */ + (void)png_set_interlace_handling(png_ptr); + /* Optional call to gamma correct and add the background to the palette * and update info structure. REQUIRED if you are expecting libpng to * update the palette for you (i.e., you selected such a transform above). @@ -1332,10 +1278,10 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); if (info_ptr->row_pointers == NULL) { - png_uint_32 iptr; + png_uint_32 iptr; info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr, - info_ptr->height * png_sizeof(png_bytep)); + info_ptr->height * png_sizeof(png_bytep)); for (iptr=0; iptrheight; iptr++) info_ptr->row_pointers[iptr] = NULL; @@ -1352,8 +1298,8 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, /* Read rest of file, and get additional chunks in info_ptr - REQUIRED */ png_read_end(png_ptr, info_ptr); - transforms = transforms; /* Quiet compiler warnings */ - params = params; + PNG_UNUSED(transforms) /* Quiet compiler warnings */ + PNG_UNUSED(params) } #endif /* PNG_INFO_IMAGE_SUPPORTED */ diff --git a/src/png/pngrio.c b/src/png/pngrio.c index 59059caf69..e9c381c5ba 100644 --- a/src/png/pngrio.c +++ b/src/png/pngrio.c @@ -1,8 +1,8 @@ /* pngrio.c - functions for data input * - * Last changed in libpng 1.4.1 [February 25, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.0 [January 6, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -18,11 +18,10 @@ * libpng use it at run time with png_set_read_fn(...). */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_READ_SUPPORTED #include "pngpriv.h" +#ifdef PNG_READ_SUPPORTED + /* Read the data from whatever input you are using. The default routine * reads from a file pointer. Note that this routine sometimes gets called * with very small lengths, so you should implement some kind of simple @@ -33,9 +32,10 @@ void /* PRIVATE */ png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_debug1(4, "reading %d bytes", (int)length); - + if (png_ptr->read_data_fn != NULL) (*(png_ptr->read_data_fn))(png_ptr, data, length); + else png_error(png_ptr, "Call to NULL read function"); } @@ -46,14 +46,15 @@ png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) * read_data function and use it at run time with png_set_read_fn(), rather * than changing the library. */ -#ifndef USE_FAR_KEYWORD -void PNGAPI +# ifndef USE_FAR_KEYWORD +void PNGCBAPI png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; if (png_ptr == NULL) return; + /* fread() returns 0 on error, so it is OK to store this in a png_size_t * instead of an int, which is what fread() actually returns. */ @@ -62,7 +63,7 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) if (check != length) png_error(png_ptr, "Read Error"); } -#else +# else /* This is the model-independent version. Since the standard I/O library can't handle far buffers in the medium and small models, we have to copy the data. @@ -71,7 +72,7 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) #define NEAR_BUF_SIZE 1024 #define MIN(a,b) (a <= b ? a : b) -static void PNGAPI +static void PNGCBAPI png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; @@ -80,46 +81,57 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) if (png_ptr == NULL) return; + /* Check if data really is near. If so, use usual code. */ n_data = (png_byte *)CVT_PTR_NOCHECK(data); io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); + if ((png_bytep)n_data == data) { check = fread(n_data, 1, length, io_ptr); } + else { png_byte buf[NEAR_BUF_SIZE]; png_size_t read, remaining, err; check = 0; remaining = length; + do { read = MIN(NEAR_BUF_SIZE, remaining); err = fread(buf, 1, read, io_ptr); png_memcpy(data, buf, read); /* copy far buffer to near buffer */ + if (err != read) break; + else check += err; + data += read; remaining -= read; } while (remaining != 0); } + if ((png_uint_32)check != (png_uint_32)length) png_error(png_ptr, "read Error"); } -#endif +# endif #endif /* This function allows the application to supply a new input function * for libpng if standard C streams aren't being used. * * This function takes as its arguments: + * * png_ptr - pointer to a png input data structure + * * io_ptr - pointer to user supplied structure containing info about * the input functions. May be NULL. + * * read_data_fn - pointer to a new input function that takes as its * arguments a pointer to a png_struct, a pointer to * a location where input data can be stored, and a 32-bit @@ -135,11 +147,13 @@ png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, { if (png_ptr == NULL) return; + png_ptr->io_ptr = io_ptr; #ifdef PNG_STDIO_SUPPORTED if (read_data_fn != NULL) png_ptr->read_data_fn = read_data_fn; + else png_ptr->read_data_fn = png_default_read_data; #else @@ -151,9 +165,8 @@ png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, { png_ptr->write_data_fn = NULL; png_warning(png_ptr, - "It's an error to set both read_data_fn and write_data_fn in the "); - png_warning(png_ptr, - "same structure. Resetting write_data_fn to NULL"); + "Can't set both read_data_fn and write_data_fn in the" + " same structure"); } #ifdef PNG_WRITE_FLUSH_SUPPORTED diff --git a/src/png/pngrtran.c b/src/png/pngrtran.c index b5e8f1a26f..d10f5cff54 100644 --- a/src/png/pngrtran.c +++ b/src/png/pngrtran.c @@ -1,8 +1,8 @@ /* pngrtran.c - transforms the data in a row for PNG readers * - * Last changed in libpng 1.4.2 [May 6, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -16,17 +16,16 @@ * in pngtrans.c. */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_READ_SUPPORTED #include "pngpriv.h" +#ifdef PNG_READ_SUPPORTED + /* Set the action on getting a CRC error for an ancillary or critical chunk. */ void PNGAPI png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action) { png_debug(1, "in png_set_crc_action"); - + if (png_ptr == NULL) return; @@ -89,35 +88,69 @@ png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action) } } -#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \ - defined(PNG_FLOATING_POINT_SUPPORTED) +#ifdef PNG_READ_BACKGROUND_SUPPORTED /* Handle alpha and tRNS via a background color */ -void PNGAPI -png_set_background(png_structp png_ptr, - png_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma) +void PNGFAPI +png_set_background_fixed(png_structp png_ptr, + png_const_color_16p background_color, int background_gamma_code, + int need_expand, png_fixed_point background_gamma) { - png_debug(1, "in png_set_background"); - + png_debug(1, "in png_set_background_fixed"); + if (png_ptr == NULL) return; + if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN) { png_warning(png_ptr, "Application must supply a known background gamma"); return; } - png_ptr->transformations |= PNG_BACKGROUND; + png_ptr->transformations |= PNG_COMPOSE | PNG_STRIP_ALPHA; + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + png_memcpy(&(png_ptr->background), background_color, png_sizeof(png_color_16)); - png_ptr->background_gamma = (float)background_gamma; + png_ptr->background_gamma = background_gamma; png_ptr->background_gamma_type = (png_byte)(background_gamma_code); - png_ptr->transformations |= (need_expand ? PNG_BACKGROUND_EXPAND : 0); + if (need_expand) + png_ptr->transformations |= PNG_BACKGROUND_EXPAND; + else + png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_background(png_structp png_ptr, + png_const_color_16p background_color, int background_gamma_code, + int need_expand, double background_gamma) +{ + png_set_background_fixed(png_ptr, background_color, background_gamma_code, + need_expand, png_fixed(png_ptr, background_gamma, "png_set_background")); +} +# endif /* FLOATING_POINT */ +#endif /* READ_BACKGROUND */ + +/* Scale 16-bit depth files to 8-bit depth. If both of these are set then the + * one that pngrtran does first (scale) happens. This is necessary to allow the + * TRANSFORM and API behavior to be somewhat consistent, and it's simpler. + */ +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED +void PNGAPI +png_set_scale_16(png_structp png_ptr) +{ + png_debug(1, "in png_set_scale_16"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_SCALE_16_TO_8; } #endif -#ifdef PNG_READ_16_TO_8_SUPPORTED -/* Strip 16 bit depth files to 8 bit depth */ +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED +/* Chop 16-bit depth files to 8-bit depth */ void PNGAPI png_set_strip_16(png_structp png_ptr) { @@ -125,6 +158,7 @@ png_set_strip_16(png_structp png_ptr) if (png_ptr == NULL) return; + png_ptr->transformations |= PNG_16_TO_8; } #endif @@ -137,17 +171,200 @@ png_set_strip_alpha(png_structp png_ptr) if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_STRIP_ALPHA; + + png_ptr->transformations |= PNG_STRIP_ALPHA; } #endif +#if defined(PNG_READ_ALPHA_MODE_SUPPORTED) || defined(PNG_READ_GAMMA_SUPPORTED) +static png_fixed_point +translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma, + int is_screen) +{ + /* Check for flag values. The main reason for having the old Mac value as a + * flag is that it is pretty near impossible to work out what the correct + * value is from Apple documentation - a working Mac system is needed to + * discover the value! + */ + if (output_gamma == PNG_DEFAULT_sRGB || + output_gamma == PNG_FP_1 / PNG_DEFAULT_sRGB) + { + /* If there is no sRGB support this just sets the gamma to the standard + * sRGB value. (This is a side effect of using this function!) + */ +# ifdef PNG_READ_sRGB_SUPPORTED + png_ptr->flags |= PNG_FLAG_ASSUME_sRGB; +# endif + if (is_screen) + output_gamma = PNG_GAMMA_sRGB; + else + output_gamma = PNG_GAMMA_sRGB_INVERSE; + } + + else if (output_gamma == PNG_GAMMA_MAC_18 || + output_gamma == PNG_FP_1 / PNG_GAMMA_MAC_18) + { + if (is_screen) + output_gamma = PNG_GAMMA_MAC_OLD; + else + output_gamma = PNG_GAMMA_MAC_INVERSE; + } + + return output_gamma; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +static png_fixed_point +convert_gamma_value(png_structp png_ptr, double output_gamma) +{ + /* The following silently ignores cases where fixed point (times 100,000) + * gamma values are passed to the floating point API. This is safe and it + * means the fixed point constants work just fine with the floating point + * API. The alternative would just lead to undetected errors and spurious + * bug reports. Negative values fail inside the _fixed API unless they + * correspond to the flag values. + */ + if (output_gamma > 0 && output_gamma < 128) + output_gamma *= PNG_FP_1; + + /* This preserves -1 and -2 exactly: */ + output_gamma = floor(output_gamma + .5); + + if (output_gamma > PNG_FP_MAX || output_gamma < PNG_FP_MIN) + png_fixed_error(png_ptr, "gamma value"); + + return (png_fixed_point)output_gamma; +} +# endif +#endif /* READ_ALPHA_MODE || READ_GAMMA */ + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED +void PNGFAPI +png_set_alpha_mode_fixed(png_structp png_ptr, int mode, + png_fixed_point output_gamma) +{ + int compose = 0; + png_fixed_point file_gamma; + + png_debug(1, "in png_set_alpha_mode"); + + if (png_ptr == NULL) + return; + + output_gamma = translate_gamma_flags(png_ptr, output_gamma, 1/*screen*/); + + /* Validate the value to ensure it is in a reasonable range. The value + * is expected to be 1 or greater, but this range test allows for some + * viewing correction values. The intent is to weed out users of this API + * who use the inverse of the gamma value accidentally! Since some of these + * values are reasonable this may have to be changed. + */ + if (output_gamma < 70000 || output_gamma > 300000) + png_error(png_ptr, "output gamma out of expected range"); + + /* The default file gamma is the inverse of the output gamma; the output + * gamma may be changed below so get the file value first: + */ + file_gamma = png_reciprocal(output_gamma); + + /* There are really 8 possibilities here, composed of any combination + * of: + * + * premultiply the color channels + * do not encode non-opaque pixels + * encode the alpha as well as the color channels + * + * The differences disappear if the input/output ('screen') gamma is 1.0, + * because then the encoding is a no-op and there is only the choice of + * premultiplying the color channels or not. + * + * png_set_alpha_mode and png_set_background interact because both use + * png_compose to do the work. Calling both is only useful when + * png_set_alpha_mode is used to set the default mode - PNG_ALPHA_PNG - along + * with a default gamma value. Otherwise PNG_COMPOSE must not be set. + */ + switch (mode) + { + case PNG_ALPHA_PNG: /* default: png standard */ + /* No compose, but it may be set by png_set_background! */ + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + break; + + case PNG_ALPHA_ASSOCIATED: /* color channels premultiplied */ + compose = 1; + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + /* The output is linear: */ + output_gamma = PNG_FP_1; + break; + + case PNG_ALPHA_OPTIMIZED: /* associated, non-opaque pixels linear */ + compose = 1; + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags |= PNG_FLAG_OPTIMIZE_ALPHA; + /* output_gamma records the encoding of opaque pixels! */ + break; + + case PNG_ALPHA_BROKEN: /* associated, non-linear, alpha encoded */ + compose = 1; + png_ptr->transformations |= PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + break; + + default: + png_error(png_ptr, "invalid alpha mode"); + } + + /* Only set the default gamma if the file gamma has not been set (this has + * the side effect that the gamma in a second call to png_set_alpha_mode will + * be ignored.) + */ + if (png_ptr->gamma == 0) + png_ptr->gamma = file_gamma; + + /* But always set the output gamma: */ + png_ptr->screen_gamma = output_gamma; + + /* Finally, if pre-multiplying, set the background fields to achieve the + * desired result. + */ + if (compose) + { + /* And obtain alpha pre-multiplication by composing on black: */ + png_memset(&png_ptr->background, 0, sizeof png_ptr->background); + png_ptr->background_gamma = png_ptr->gamma; /* just in case */ + png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_FILE; + png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND; + + if (png_ptr->transformations & PNG_COMPOSE) + png_error(png_ptr, + "conflicting calls to set alpha mode and background"); + + png_ptr->transformations |= PNG_COMPOSE; + } + + /* New API, make sure apps call the correct initializers: */ + png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_alpha_mode(png_structp png_ptr, int mode, double output_gamma) +{ + png_set_alpha_mode_fixed(png_ptr, mode, convert_gamma_value(png_ptr, + output_gamma)); +} +# endif +#endif + #ifdef PNG_READ_QUANTIZE_SUPPORTED -/* Quantize file to 8 bit. Supply a palette, the current number +/* Dither file to 8-bit. Supply a palette, the current number * of elements in the palette, the maximum number of elements * allowed, and a histogram if possible. If the current number * of colors is greater then the maximum number, the palette will be * modified to fit in the maximum number. "full_quantize" indicates - * whether we need a quantizeing cube set up for RGB images, or if we + * whether we need a quantizing cube set up for RGB images, or if we * simply are reducing the number of colors in a paletted image. */ @@ -162,13 +379,14 @@ typedef png_dsort FAR * FAR * png_dsortpp; void PNGAPI png_set_quantize(png_structp png_ptr, png_colorp palette, - int num_palette, int maximum_colors, png_uint_16p histogram, - int full_quantize) + int num_palette, int maximum_colors, png_const_uint_16p histogram, + int full_quantize) { png_debug(1, "in png_set_quantize"); if (png_ptr == NULL) return; + png_ptr->transformations |= PNG_QUANTIZE; if (!full_quantize) @@ -176,7 +394,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, int i; png_ptr->quantize_index = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * png_sizeof(png_byte))); + (png_uint_32)(num_palette * png_sizeof(png_byte))); for (i = 0; i < num_palette; i++) png_ptr->quantize_index[i] = (png_byte)i; } @@ -193,7 +411,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, /* Initialize an array to sort colors */ png_ptr->quantize_sort = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * png_sizeof(png_byte))); + (png_uint_32)(num_palette * png_sizeof(png_byte))); /* Initialize the quantize_sort array */ for (i = 0; i < num_palette; i++) @@ -225,6 +443,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, done = 0; } } + if (done) break; } @@ -244,6 +463,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, do j--; while ((int)png_ptr->quantize_sort[j] >= maximum_colors); + palette[i] = palette[j]; } } @@ -325,9 +545,9 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, /* Initialize palette index arrays */ png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * png_sizeof(png_byte))); + (png_uint_32)(num_palette * png_sizeof(png_byte))); png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * png_sizeof(png_byte))); + (png_uint_32)(num_palette * png_sizeof(png_byte))); /* Initialize the sort array */ for (i = 0; i < num_palette; i++) @@ -337,7 +557,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, } hash = (png_dsortpp)png_calloc(png_ptr, (png_uint_32)(769 * - png_sizeof(png_dsortp))); + png_sizeof(png_dsortp))); num_new_palette = num_palette; @@ -368,8 +588,10 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, t = (png_dsortp)png_malloc_warn(png_ptr, (png_uint_32)(png_sizeof(png_dsort))); + if (t == NULL) break; + t->next = hash[d]; t->left = (png_byte)i; t->right = (png_byte)j; @@ -390,9 +612,9 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, for (p = hash[i]; p; p = p->next) { if ((int)png_ptr->index_to_palette[p->left] - < num_new_palette && - (int)png_ptr->index_to_palette[p->right] - < num_new_palette) + < num_new_palette && + (int)png_ptr->index_to_palette[p->right] + < num_new_palette) { int j, next_j; @@ -409,7 +631,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, num_new_palette--; palette[png_ptr->index_to_palette[j]] - = palette[num_new_palette]; + = palette[num_new_palette]; if (!full_quantize) { int k; @@ -417,23 +639,26 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, for (k = 0; k < num_palette; k++) { if (png_ptr->quantize_index[k] == - png_ptr->index_to_palette[j]) + png_ptr->index_to_palette[j]) png_ptr->quantize_index[k] = - png_ptr->index_to_palette[next_j]; + png_ptr->index_to_palette[next_j]; + if ((int)png_ptr->quantize_index[k] == - num_new_palette) + num_new_palette) png_ptr->quantize_index[k] = - png_ptr->index_to_palette[j]; + png_ptr->index_to_palette[j]; } } png_ptr->index_to_palette[png_ptr->palette_to_index - [num_new_palette]] = png_ptr->index_to_palette[j]; + [num_new_palette]] = png_ptr->index_to_palette[j]; + png_ptr->palette_to_index[png_ptr->index_to_palette[j]] - = png_ptr->palette_to_index[num_new_palette]; + = png_ptr->palette_to_index[num_new_palette]; png_ptr->index_to_palette[j] = (png_byte)num_new_palette; + png_ptr->palette_to_index[num_new_palette] = (png_byte)j; } @@ -480,17 +705,18 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, int i; png_bytep distance; int total_bits = PNG_QUANTIZE_RED_BITS + PNG_QUANTIZE_GREEN_BITS + - PNG_QUANTIZE_BLUE_BITS; + PNG_QUANTIZE_BLUE_BITS; int num_red = (1 << PNG_QUANTIZE_RED_BITS); int num_green = (1 << PNG_QUANTIZE_GREEN_BITS); int num_blue = (1 << PNG_QUANTIZE_BLUE_BITS); png_size_t num_entries = ((png_size_t)1 << total_bits); - png_ptr->palette_lookup = (png_bytep )png_calloc(png_ptr, - (png_uint_32)(num_entries * png_sizeof(png_byte))); + png_ptr->palette_lookup = (png_bytep)png_calloc(png_ptr, + (png_uint_32)(num_entries * png_sizeof(png_byte))); distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries * - png_sizeof(png_byte))); + png_sizeof(png_byte))); + png_memset(distance, 0xff, num_entries * png_sizeof(png_byte)); for (i = 0; i < num_palette; i++) @@ -538,33 +764,56 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, } #endif /* PNG_READ_QUANTIZE_SUPPORTED */ -#if defined(PNG_READ_GAMMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED) -/* Transform the image from the file_gamma to the screen_gamma. We - * only do transformations on images where the file_gamma and screen_gamma - * are not close reciprocals, otherwise it slows things down slightly, and - * also needlessly introduces small errors. - * - * We will turn off gamma transformation later if no semitransparent entries - * are present in the tRNS array for palette images. We can't do it here - * because we don't necessarily have the tRNS chunk yet. - */ -void PNGAPI -png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma) +#ifdef PNG_READ_GAMMA_SUPPORTED +void PNGFAPI +png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma, + png_fixed_point file_gamma) { - png_debug(1, "in png_set_gamma"); + png_debug(1, "in png_set_gamma_fixed"); if (png_ptr == NULL) return; - if ((fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) || - (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) || - (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)) - png_ptr->transformations |= PNG_GAMMA; - png_ptr->gamma = (float)file_gamma; - png_ptr->screen_gamma = (float)scrn_gamma; -} + /* New in libpng-1.5.4 - reserve particular negative values as flags. */ + scrn_gamma = translate_gamma_flags(png_ptr, scrn_gamma, 1/*screen*/); + file_gamma = translate_gamma_flags(png_ptr, file_gamma, 0/*file*/); + +#if PNG_LIBPNG_VER >= 10600 + /* Checking the gamma values for being >0 was added in 1.5.4 along with the + * premultiplied alpha support; this actually hides an undocumented feature + * of the previous implementation which allowed gamma processing to be + * disabled in background handling. There is no evidence (so far) that this + * was being used; however, png_set_background itself accepted and must still + * accept '0' for the gamma value it takes, because it isn't always used. + * + * Since this is an API change (albeit a very minor one that removes an + * undocumented API feature) it will not be made until libpng-1.6.0. + */ + if (file_gamma <= 0) + png_error(png_ptr, "invalid file gamma in png_set_gamma"); + + if (scrn_gamma <= 0) + png_error(png_ptr, "invalid screen gamma in png_set_gamma"); #endif + /* Set the gamma values unconditionally - this overrides the value in the PNG + * file if a gAMA chunk was present. png_set_alpha_mode provides a + * different, easier, way to default the file gamma. + */ + png_ptr->gamma = file_gamma; + png_ptr->screen_gamma = scrn_gamma; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma) +{ + png_set_gamma_fixed(png_ptr, convert_gamma_value(png_ptr, scrn_gamma), + convert_gamma_value(png_ptr, file_gamma)); +} +# endif /* FLOATING_POINT_SUPPORTED */ +#endif /* READ_GAMMA */ + #ifdef PNG_READ_EXPAND_SUPPORTED /* Expand paletted images to RGB, expand grayscale images of * less than 8-bit depth to 8-bit depth, and expand tRNS chunks @@ -639,38 +888,46 @@ png_set_tRNS_to_alpha(png_structp png_ptr) } #endif /* defined(PNG_READ_EXPAND_SUPPORTED) */ -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +#ifdef PNG_READ_EXPAND_16_SUPPORTED +/* Expand to 16-bit channels, expand the tRNS chunk too (because otherwise + * it may not work correctly.) + */ void PNGAPI -png_set_gray_to_rgb(png_structp png_ptr) +png_set_expand_16(png_structp png_ptr) { - png_debug(1, "in png_set_gray_to_rgb"); + png_debug(1, "in png_set_expand_16"); - png_ptr->transformations |= PNG_GRAY_TO_RGB; + if (png_ptr == NULL) + return; + + png_ptr->transformations |= (PNG_EXPAND_16 | PNG_EXPAND | PNG_EXPAND_tRNS); png_ptr->flags &= ~PNG_FLAG_ROW_INIT; + + /* New API, make sure apps call the correct initializers: */ + png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; } #endif -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -/* Convert a RGB image to a grayscale of the same width. This allows us, - * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image. - */ - +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED void PNGAPI -png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red, - double green) +png_set_gray_to_rgb(png_structp png_ptr) { - int red_fixed = (int)((float)red*100000.0 + 0.5); - int green_fixed = (int)((float)green*100000.0 + 0.5); - if (png_ptr == NULL) - return; - png_set_rgb_to_gray_fixed(png_ptr, error_action, red_fixed, green_fixed); + png_debug(1, "in png_set_gray_to_rgb"); + + if (png_ptr != NULL) + { + /* Because rgb must be 8 bits or more: */ + png_set_expand_gray_1_2_4_to_8(png_ptr); + png_ptr->transformations |= PNG_GRAY_TO_RGB; + png_ptr->flags &= ~PNG_FLAG_ROW_INIT; + } } #endif -void PNGAPI +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +void PNGFAPI png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, - png_fixed_point red, png_fixed_point green) + png_fixed_point red, png_fixed_point green) { png_debug(1, "in png_set_rgb_to_gray"); @@ -679,13 +936,21 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, switch(error_action) { - case 1: png_ptr->transformations |= PNG_RGB_TO_GRAY; - break; + case 1: + png_ptr->transformations |= PNG_RGB_TO_GRAY; + break; + + case 2: + png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN; + break; - case 2: png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN; - break; + case 3: + png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR; + break; - case 3: png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR; + default: + png_error(png_ptr, "invalid error action to rgb_to_gray"); + break; } if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) #ifdef PNG_READ_EXPAND_SUPPORTED @@ -694,40 +959,76 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, { png_warning(png_ptr, "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED"); + png_ptr->transformations &= ~PNG_RGB_TO_GRAY; } #endif { - png_uint_16 red_int, green_int; - if (red < 0 || green < 0) + if (red >= 0 && green >= 0 && red + green <= PNG_FP_1) { - red_int = 6968; /* .212671 * 32768 + .5 */ - green_int = 23434; /* .715160 * 32768 + .5 */ - } - else if (red + green < 100000L) - { - red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L); - green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L); + png_uint_16 red_int, green_int; + + /* NOTE: this calculation does not round, but this behavior is retained + * for consistency, the inaccuracy is very small. The code here always + * overwrites the coefficients, regardless of whether they have been + * defaulted or set already. + */ + red_int = (png_uint_16)(((png_uint_32)red*32768)/100000); + green_int = (png_uint_16)(((png_uint_32)green*32768)/100000); + + png_ptr->rgb_to_gray_red_coeff = red_int; + png_ptr->rgb_to_gray_green_coeff = green_int; + png_ptr->rgb_to_gray_coefficients_set = 1; } + else { - png_warning(png_ptr, "ignoring out of range rgb_to_gray coefficients"); - red_int = 6968; - green_int = 23434; + if (red >= 0 && green >= 0) + png_warning(png_ptr, + "ignoring out of range rgb_to_gray coefficients"); + + /* Use the defaults, from the cHRM chunk if set, else the historical + * values which are close to the sRGB/HDTV/ITU-Rec 709 values. See + * png_do_rgb_to_gray for more discussion of the values. In this case + * the coefficients are not marked as 'set' and are not overwritten if + * something has already provided a default. + */ + if (png_ptr->rgb_to_gray_red_coeff == 0 && + png_ptr->rgb_to_gray_green_coeff == 0) + { + png_ptr->rgb_to_gray_red_coeff = 6968; + png_ptr->rgb_to_gray_green_coeff = 23434; + /* png_ptr->rgb_to_gray_blue_coeff = 2366; */ + } } - png_ptr->rgb_to_gray_red_coeff = red_int; - png_ptr->rgb_to_gray_green_coeff = green_int; - png_ptr->rgb_to_gray_blue_coeff = - (png_uint_16)(32768 - red_int - green_int); } } + +#ifdef PNG_FLOATING_POINT_SUPPORTED +/* Convert a RGB image to a grayscale of the same width. This allows us, + * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image. + */ + +void PNGAPI +png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red, + double green) +{ + if (png_ptr == NULL) + return; + + png_set_rgb_to_gray_fixed(png_ptr, error_action, + png_fixed(png_ptr, red, "rgb to gray red coefficient"), + png_fixed(png_ptr, green, "rgb to gray green coefficient")); +} +#endif /* FLOATING POINT */ + #endif #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) void PNGAPI png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr - read_user_transform_fn) + read_user_transform_fn) { png_debug(1, "in png_set_read_user_transform_fn"); @@ -741,169 +1042,488 @@ png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr } #endif +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +#ifdef PNG_READ_GAMMA_SUPPORTED +/* In the case of gamma transformations only do transformations on images where + * the [file] gamma and screen_gamma are not close reciprocals, otherwise it + * slows things down slightly, and also needlessly introduces small errors. + */ +static int /* PRIVATE */ +png_gamma_threshold(png_fixed_point screen_gamma, png_fixed_point file_gamma) +{ + /* PNG_GAMMA_THRESHOLD is the threshold for performing gamma + * correction as a difference of the overall transform from 1.0 + * + * We want to compare the threshold with s*f - 1, if we get + * overflow here it is because of wacky gamma values so we + * turn on processing anyway. + */ + png_fixed_point gtest; + return !png_muldiv(>est, screen_gamma, file_gamma, PNG_FP_1) || + png_gamma_significant(gtest); +} +#endif + /* Initialize everything needed for the read. This includes modifying * the palette. */ -void /* PRIVATE */ -png_init_read_transformations(png_structp png_ptr) + +/*For the moment 'png_init_palette_transformations' and + * 'png_init_rgb_transformations' only do some flag canceling optimizations. + * The intent is that these two routines should have palette or rgb operations + * extracted from 'png_init_read_transformations'. + */ +static void /* PRIVATE */ +png_init_palette_transformations(png_structp png_ptr) { - png_debug(1, "in png_init_read_transformations"); + /* Called to handle the (input) palette case. In png_do_read_transformations + * the first step is to expand the palette if requested, so this code must + * take care to only make changes that are invariant with respect to the + * palette expansion, or only do them if there is no expansion. + * + * STRIP_ALPHA has already been handled in the caller (by setting num_trans + * to 0.) + */ + int input_has_alpha = 0; + int input_has_transparency = 0; - { -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ - defined(PNG_READ_SHIFT_SUPPORTED) || \ - defined(PNG_READ_GAMMA_SUPPORTED) - int color_type = png_ptr->color_type; -#endif + if (png_ptr->num_trans > 0) + { + int i; + + /* Ignore if all the entries are opaque (unlikely!) */ + for (i=0; inum_trans; ++i) + if (png_ptr->trans_alpha[i] == 255) + continue; + else if (png_ptr->trans_alpha[i] == 0) + input_has_transparency = 1; + else + input_has_alpha = 1; + } + + /* If no alpha we can optimize. */ + if (!input_has_alpha) + { + /* Any alpha means background and associative alpha processing is + * required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA + * and ENCODE_ALPHA are irrelevant. + */ + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + + if (!input_has_transparency) + png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND); + } #if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED) + /* png_set_background handling - deals with the complexity of whether the + * background color is in the file format or the screen format in the case + * where an 'expand' will happen. + */ -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - /* Detect gray background and attempt to enable optimization - * for gray --> RGB case - * - * Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or - * RGB_ALPHA (in which case need_expand is superfluous anyway), the - * background color might actually be gray yet not be flagged as such. - * This is not a problem for the current code, which uses - * PNG_BACKGROUND_IS_GRAY only to decide when to do the - * png_do_gray_to_rgb() transformation. + /* The following code cannot be entered in the alpha pre-multiplication case + * because PNG_BACKGROUND_EXPAND is cancelled below. */ if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) && - !(color_type & PNG_COLOR_MASK_COLOR)) + (png_ptr->transformations & PNG_EXPAND)) { - png_ptr->mode |= PNG_BACKGROUND_IS_GRAY; - } else if ((png_ptr->transformations & PNG_BACKGROUND) && - !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) && - (png_ptr->transformations & PNG_GRAY_TO_RGB) && - png_ptr->background.red == png_ptr->background.green && - png_ptr->background.red == png_ptr->background.blue) + { + png_ptr->background.red = + png_ptr->palette[png_ptr->background.index].red; + png_ptr->background.green = + png_ptr->palette[png_ptr->background.index].green; + png_ptr->background.blue = + png_ptr->palette[png_ptr->background.index].blue; + +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_INVERT_ALPHA) + { + if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) + { + /* Invert the alpha channel (in tRNS) unless the pixels are + * going to be expanded, in which case leave it for later + */ + int i, istop = png_ptr->num_trans; + + for (i=0; itrans_alpha[i] = (png_byte)(255 - + png_ptr->trans_alpha[i]); + } + } +#endif /* PNG_READ_INVERT_ALPHA_SUPPORTED */ + } + } /* background expand and (therefore) no alpha association. */ +#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ +} + +static void /* PRIVATE */ +png_init_rgb_transformations(png_structp png_ptr) +{ + /* Added to libpng-1.5.4: check the color type to determine whether there + * is any alpha or transparency in the image and simply cancel the + * background and alpha mode stuff if there isn't. + */ + int input_has_alpha = (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0; + int input_has_transparency = png_ptr->num_trans > 0; + + /* If no alpha we can optimize. */ + if (!input_has_alpha) { - png_ptr->mode |= PNG_BACKGROUND_IS_GRAY; - png_ptr->background.gray = png_ptr->background.red; + /* Any alpha means background and associative alpha processing is + * required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA + * and ENCODE_ALPHA are irrelevant. + */ +# ifdef PNG_READ_ALPHA_MODE_SUPPORTED + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; +# endif + + if (!input_has_transparency) + png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND); } -#endif +#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED) + /* png_set_background handling - deals with the complexity of whether the + * background color is in the file format or the screen format in the case + * where an 'expand' will happen. + */ + + /* The following code cannot be entered in the alpha pre-multiplication case + * because PNG_BACKGROUND_EXPAND is cancelled below. + */ if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) && - (png_ptr->transformations & PNG_EXPAND)) + (png_ptr->transformations & PNG_EXPAND) && + !(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) + /* i.e., GRAY or GRAY_ALPHA */ { - if (!(color_type & PNG_COLOR_MASK_COLOR)) /* i.e., GRAY or GRAY_ALPHA */ { /* Expand background and tRNS chunks */ + int gray = png_ptr->background.gray; + int trans_gray = png_ptr->trans_color.gray; + switch (png_ptr->bit_depth) { case 1: - png_ptr->background.gray *= (png_uint_16)0xff; - png_ptr->background.red = png_ptr->background.green - = png_ptr->background.blue = png_ptr->background.gray; - if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) - { - png_ptr->trans_color.gray *= (png_uint_16)0xff; - png_ptr->trans_color.red = png_ptr->trans_color.green - = png_ptr->trans_color.blue = png_ptr->trans_color.gray; - } + gray *= 0xff; + trans_gray *= 0xff; break; case 2: - png_ptr->background.gray *= (png_uint_16)0x55; - png_ptr->background.red = png_ptr->background.green - = png_ptr->background.blue = png_ptr->background.gray; - if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) - { - png_ptr->trans_color.gray *= (png_uint_16)0x55; - png_ptr->trans_color.red = png_ptr->trans_color.green - = png_ptr->trans_color.blue = png_ptr->trans_color.gray; - } + gray *= 0x55; + trans_gray *= 0x55; break; case 4: - png_ptr->background.gray *= (png_uint_16)0x11; - png_ptr->background.red = png_ptr->background.green - = png_ptr->background.blue = png_ptr->background.gray; - if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) - { - png_ptr->trans_color.gray *= (png_uint_16)0x11; - png_ptr->trans_color.red = png_ptr->trans_color.green - = png_ptr->trans_color.blue = png_ptr->trans_color.gray; - } + gray *= 0x11; + trans_gray *= 0x11; break; + default: + case 8: + /* Already 8 bits, fall through */ case 16: - png_ptr->background.red = png_ptr->background.green - = png_ptr->background.blue = png_ptr->background.gray; + /* Already a full 16 bits */ break; } + + png_ptr->background.red = png_ptr->background.green = + png_ptr->background.blue = (png_uint_16)gray; + + if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) + { + png_ptr->trans_color.red = png_ptr->trans_color.green = + png_ptr->trans_color.blue = (png_uint_16)trans_gray; + } } - else if (color_type == PNG_COLOR_TYPE_PALETTE) + } /* background expand and (therefore) no alpha association. */ +#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ +} + +void /* PRIVATE */ +png_init_read_transformations(png_structp png_ptr) +{ + png_debug(1, "in png_init_read_transformations"); + + /* This internal function is called from png_read_start_row in pngrutil.c + * and it is called before the 'rowbytes' calculation is done, so the code + * in here can change or update the transformations flags. + * + * First do updates that do not depend on the details of the PNG image data + * being processed. + */ + +#ifdef PNG_READ_GAMMA_SUPPORTED + /* Prior to 1.5.4 these tests were performed from png_set_gamma, 1.5.4 adds + * png_set_alpha_mode and this is another source for a default file gamma so + * the test needs to be performed later - here. In addition prior to 1.5.4 + * the tests were repeated for the PALETTE color type here - this is no + * longer necessary (and doesn't seem to have been necessary before.) + */ + { + /* The following temporary indicates if overall gamma correction is + * required. + */ + int gamma_correction = 0; + + if (png_ptr->gamma != 0) /* has been set */ { - png_ptr->background.red = - png_ptr->palette[png_ptr->background.index].red; - png_ptr->background.green = - png_ptr->palette[png_ptr->background.index].green; - png_ptr->background.blue = - png_ptr->palette[png_ptr->background.index].blue; + if (png_ptr->screen_gamma != 0) /* screen set too */ + gamma_correction = png_gamma_threshold(png_ptr->gamma, + png_ptr->screen_gamma); -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_ALPHA) - { -#ifdef PNG_READ_EXPAND_SUPPORTED - if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) + else + /* Assume the output matches the input; a long time default behavior + * of libpng, although the standard has nothing to say about this. + */ + png_ptr->screen_gamma = png_reciprocal(png_ptr->gamma); + } + + else if (png_ptr->screen_gamma != 0) + /* The converse - assume the file matches the screen, note that this + * perhaps undesireable default can (from 1.5.4) be changed by calling + * png_set_alpha_mode (even if the alpha handling mode isn't required + * or isn't changed from the default.) + */ + png_ptr->gamma = png_reciprocal(png_ptr->screen_gamma); + + else /* neither are set */ + /* Just in case the following prevents any processing - file and screen + * are both assumed to be linear and there is no way to introduce a + * third gamma value other than png_set_background with 'UNIQUE', and, + * prior to 1.5.4 + */ + png_ptr->screen_gamma = png_ptr->gamma = PNG_FP_1; + + /* Now turn the gamma transformation on or off as appropriate. Notice + * that PNG_GAMMA just refers to the file->screen correction. Alpha + * composition may independently cause gamma correction because it needs + * linear data (e.g. if the file has a gAMA chunk but the screen gamma + * hasn't been specified.) In any case this flag may get turned off in + * the code immediately below if the transform can be handled outside the + * row loop. + */ + if (gamma_correction) + png_ptr->transformations |= PNG_GAMMA; + + else + png_ptr->transformations &= ~PNG_GAMMA; + } #endif - { - /* Invert the alpha channel (in tRNS) unless the pixels are - * going to be expanded, in which case leave it for later - */ - int i, istop; - istop=(int)png_ptr->num_trans; - for (i=0; itrans_alpha[i] = (png_byte)(255 - png_ptr->trans_alpha[i]); - } - } + + /* Certain transformations have the effect of preventing other + * transformations that happen afterward in png_do_read_transformations, + * resolve the interdependencies here. From the code of + * png_do_read_transformations the order is: + * + * 1) PNG_EXPAND (including PNG_EXPAND_tRNS) + * 2) PNG_STRIP_ALPHA (if no compose) + * 3) PNG_RGB_TO_GRAY + * 4) PNG_GRAY_TO_RGB iff !PNG_BACKGROUND_IS_GRAY + * 5) PNG_COMPOSE + * 6) PNG_GAMMA + * 7) PNG_STRIP_ALPHA (if compose) + * 8) PNG_ENCODE_ALPHA + * 9) PNG_SCALE_16_TO_8 + * 10) PNG_16_TO_8 + * 11) PNG_QUANTIZE (converts to palette) + * 12) PNG_EXPAND_16 + * 13) PNG_GRAY_TO_RGB iff PNG_BACKGROUND_IS_GRAY + * 14) PNG_INVERT_MONO + * 15) PNG_SHIFT + * 16) PNG_PACK + * 17) PNG_BGR + * 18) PNG_PACKSWAP + * 19) PNG_FILLER (includes PNG_ADD_ALPHA) + * 20) PNG_INVERT_ALPHA + * 21) PNG_SWAP_ALPHA + * 22) PNG_SWAP_BYTES + * 23) PNG_USER_TRANSFORM [must be last] + */ +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) && + !(png_ptr->transformations & PNG_COMPOSE)) + { + /* Stripping the alpha channel happens immediately after the 'expand' + * transformations, before all other transformation, so it cancels out + * the alpha handling. It has the side effect negating the effect of + * PNG_EXPAND_tRNS too: + */ + png_ptr->transformations &= ~(PNG_BACKGROUND_EXPAND | PNG_ENCODE_ALPHA | + PNG_EXPAND_tRNS); + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + + /* Kill the tRNS chunk itself too. Prior to 1.5.4 this did not happen + * so transparency information would remain just so long as it wasn't + * expanded. This produces unexpected API changes if the set of things + * that do PNG_EXPAND_tRNS changes (perfectly possible given the + * documentation - which says ask for what you want, accept what you + * get.) This makes the behavior consistent from 1.5.4: + */ + png_ptr->num_trans = 0; + } +#endif /* STRIP_ALPHA supported, no COMPOSE */ + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + /* If the screen gamma is about 1.0 then the OPTIMIZE_ALPHA and ENCODE_ALPHA + * settings will have no effect. + */ + if (!png_gamma_significant(png_ptr->screen_gamma)) + { + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + } #endif +#if defined(PNG_READ_EXPAND_SUPPORTED) && \ + defined(PNG_READ_BACKGROUND_SUPPORTED) && \ + defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) + /* Detect gray background and attempt to enable optimization for + * gray --> RGB case. + * + * Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or + * RGB_ALPHA (in which case need_expand is superfluous anyway), the + * background color might actually be gray yet not be flagged as such. + * This is not a problem for the current code, which uses + * PNG_BACKGROUND_IS_GRAY only to decide when to do the + * png_do_gray_to_rgb() transformation. + * + * TODO: this code needs to be revised to avoid the complexity and + * interdependencies. The color type of the background should be recorded in + * png_set_background, along with the bit depth, then the code has a record + * of exactly what color space the background is currently in. + */ + if (png_ptr->transformations & PNG_BACKGROUND_EXPAND) + { + /* PNG_BACKGROUND_EXPAND: the background is in the file color space, so if + * the file was grayscale the background value is gray. + */ + if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) + png_ptr->mode |= PNG_BACKGROUND_IS_GRAY; + } + + else if (png_ptr->transformations & PNG_COMPOSE) + { + /* PNG_COMPOSE: png_set_background was called with need_expand false, + * so the color is in the color space of the output or png_set_alpha_mode + * was called and the color is black. Ignore RGB_TO_GRAY because that + * happens before GRAY_TO_RGB. + */ + if (png_ptr->transformations & PNG_GRAY_TO_RGB) + { + if (png_ptr->background.red == png_ptr->background.green && + png_ptr->background.red == png_ptr->background.blue) + { + png_ptr->mode |= PNG_BACKGROUND_IS_GRAY; + png_ptr->background.gray = png_ptr->background.red; + } } } -#endif +#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED (etc) */ -#if defined(PNG_READ_BACKGROUND_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) - png_ptr->background_1 = png_ptr->background; -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED) + /* For indexed PNG data (PNG_COLOR_TYPE_PALETTE) many of the transformations + * can be performed directly on the palette, and some (such as rgb to gray) + * can be optimized inside the palette. This is particularly true of the + * composite (background and alpha) stuff, which can be pretty much all done + * in the palette even if the result is expanded to RGB or gray afterward. + * + * NOTE: this is Not Yet Implemented, the code behaves as in 1.5.1 and + * earlier and the palette stuff is actually handled on the first row. This + * leads to the reported bug that the palette returned by png_get_PLTE is not + * updated. + */ + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + png_init_palette_transformations(png_ptr); + + else + png_init_rgb_transformations(png_ptr); - if ((color_type == PNG_COLOR_TYPE_PALETTE && png_ptr->num_trans != 0) - && (fabs(png_ptr->screen_gamma * png_ptr->gamma - 1.0) - < PNG_GAMMA_THRESHOLD)) +#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \ + defined(PNG_READ_EXPAND_16_SUPPORTED) + if ((png_ptr->transformations & PNG_EXPAND_16) && + (png_ptr->transformations & PNG_COMPOSE) && + !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) && + png_ptr->bit_depth != 16) { - int i, k; - k=0; - for (i=0; inum_trans; i++) - { - if (png_ptr->trans_alpha[i] != 0 && png_ptr->trans_alpha[i] != 0xff) - k=1; /* Partial transparency is present */ - } - if (k == 0) - png_ptr->transformations &= ~PNG_GAMMA; + /* TODO: fix this. Because the expand_16 operation is after the compose + * handling the background color must be 8, not 16, bits deep, but the + * application will supply a 16-bit value so reduce it here. + * + * The PNG_BACKGROUND_EXPAND code above does not expand to 16 bits at + * present, so that case is ok (until do_expand_16 is moved.) + * + * NOTE: this discards the low 16 bits of the user supplied background + * color, but until expand_16 works properly there is no choice! + */ +# define CHOP(x) (x)=((png_uint_16)(((png_uint_32)(x)*255+32895) >> 16)) + CHOP(png_ptr->background.red); + CHOP(png_ptr->background.green); + CHOP(png_ptr->background.blue); + CHOP(png_ptr->background.gray); +# undef CHOP } +#endif /* PNG_READ_BACKGROUND_SUPPORTED && PNG_READ_EXPAND_16_SUPPORTED */ + + /* NOTE: below 'PNG_READ_ALPHA_MODE_SUPPORTED' is presumed to also enable the + * background support (see the comments in scripts/pnglibconf.dfa), this + * allows pre-multiplication of the alpha channel to be implemented as + * compositing on black. This is probably sub-optimal and has been done in + * 1.5.4 betas simply to enable external critique and testing (i.e. to + * implement the new API quickly, without lots of internal changes.) + */ - if ((png_ptr->transformations & (PNG_GAMMA | PNG_RGB_TO_GRAY)) && - png_ptr->gamma != 0.0) +#ifdef PNG_READ_GAMMA_SUPPORTED +# ifdef PNG_READ_BACKGROUND_SUPPORTED + /* Includes ALPHA_MODE */ + png_ptr->background_1 = png_ptr->background; +# endif + + /* This needs to change - in the palette image case a whole set of tables are + * built when it would be quicker to just calculate the correct value for + * each palette entry directly. Also, the test is too tricky - why check + * PNG_RGB_TO_GRAY if PNG_GAMMA is not set? The answer seems to be that + * PNG_GAMMA is cancelled even if the gamma is known? The test excludes the + * PNG_COMPOSE case, so apparently if there is no *overall* gamma correction + * the gamma tables will not be built even if composition is required on a + * gamma encoded value. + * + * In 1.5.4 this is addressed below by an additional check on the individual + * file gamma - if it is not 1.0 both RGB_TO_GRAY and COMPOSE need the + * tables. + */ + if ((png_ptr->transformations & PNG_GAMMA) + || ((png_ptr->transformations & PNG_RGB_TO_GRAY) + && (png_gamma_significant(png_ptr->gamma) || + png_gamma_significant(png_ptr->screen_gamma))) + || ((png_ptr->transformations & PNG_COMPOSE) + && (png_gamma_significant(png_ptr->gamma) + || png_gamma_significant(png_ptr->screen_gamma) +# ifdef PNG_READ_BACKGROUND_SUPPORTED + || (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_UNIQUE + && png_gamma_significant(png_ptr->background_gamma)) +# endif + )) || ((png_ptr->transformations & PNG_ENCODE_ALPHA) + && png_gamma_significant(png_ptr->screen_gamma)) + ) { png_build_gamma_table(png_ptr, png_ptr->bit_depth); #ifdef PNG_READ_BACKGROUND_SUPPORTED - if (png_ptr->transformations & PNG_BACKGROUND) + if (png_ptr->transformations & PNG_COMPOSE) { - if (color_type == PNG_COLOR_TYPE_PALETTE) + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { - /* Could skip if no transparency */ + /* We don't get to here unless there is a tRNS chunk with non-opaque + * entries - see the checking code at the start of this function. + */ png_color back, back_1; png_colorp palette = png_ptr->palette; int num_palette = png_ptr->num_palette; int i; if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE) { + back.red = png_ptr->gamma_table[png_ptr->background.red]; back.green = png_ptr->gamma_table[png_ptr->background.green]; back.blue = png_ptr->gamma_table[png_ptr->background.blue]; @@ -914,57 +1534,71 @@ png_init_read_transformations(png_structp png_ptr) } else { - double g, gs; + png_fixed_point g, gs; switch (png_ptr->background_gamma_type) { case PNG_BACKGROUND_GAMMA_SCREEN: g = (png_ptr->screen_gamma); - gs = 1.0; + gs = PNG_FP_1; break; case PNG_BACKGROUND_GAMMA_FILE: - g = 1.0 / (png_ptr->gamma); - gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); + g = png_reciprocal(png_ptr->gamma); + gs = png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma); break; case PNG_BACKGROUND_GAMMA_UNIQUE: - g = 1.0 / (png_ptr->background_gamma); - gs = 1.0 / (png_ptr->background_gamma * - png_ptr->screen_gamma); + g = png_reciprocal(png_ptr->background_gamma); + gs = png_reciprocal2(png_ptr->background_gamma, + png_ptr->screen_gamma); break; default: - g = 1.0; /* back_1 */ - gs = 1.0; /* back */ + g = PNG_FP_1; /* back_1 */ + gs = PNG_FP_1; /* back */ + break; + } + + if (png_gamma_significant(gs)) + { + back.red = png_gamma_8bit_correct(png_ptr->background.red, + gs); + back.green = png_gamma_8bit_correct(png_ptr->background.green, + gs); + back.blue = png_gamma_8bit_correct(png_ptr->background.blue, + gs); } - if ( fabs(gs - 1.0) < PNG_GAMMA_THRESHOLD) + else { back.red = (png_byte)png_ptr->background.red; back.green = (png_byte)png_ptr->background.green; back.blue = (png_byte)png_ptr->background.blue; } - else + + if (png_gamma_significant(g)) { - back.red = (png_byte)(pow( - (double)png_ptr->background.red/255.0, gs) * 255.0 + .5); - back.green = (png_byte)(pow( - (double)png_ptr->background.green/255.0, gs) * 255.0 - + .5); - back.blue = (png_byte)(pow( - (double)png_ptr->background.blue/255.0, gs) * 255.0 + .5); + back_1.red = png_gamma_8bit_correct(png_ptr->background.red, + g); + back_1.green = png_gamma_8bit_correct( + png_ptr->background.green, g); + back_1.blue = png_gamma_8bit_correct(png_ptr->background.blue, + g); } - back_1.red = (png_byte)(pow( - (double)png_ptr->background.red/255.0, g) * 255.0 + .5); - back_1.green = (png_byte)(pow( - (double)png_ptr->background.green/255.0, g) * 255.0 + .5); - back_1.blue = (png_byte)(pow( - (double)png_ptr->background.blue/255.0, g) * 255.0 + .5); + else + { + back_1.red = (png_byte)png_ptr->background.red; + back_1.green = (png_byte)png_ptr->background.green; + back_1.blue = (png_byte)png_ptr->background.blue; + } } + for (i = 0; i < num_palette; i++) { - if (i < (int)png_ptr->num_trans && png_ptr->trans_alpha[i] != 0xff) + if (i < (int)png_ptr->num_trans && + png_ptr->trans_alpha[i] != 0xff) { if (png_ptr->trans_alpha[i] == 0) { @@ -994,84 +1628,113 @@ png_init_read_transformations(png_structp png_ptr) palette[i].blue = png_ptr->gamma_table[palette[i].blue]; } } - /* Prevent the transformations being done again, and make sure - * that the now spurious alpha channel is stripped - the code - * has just reduced background composition and gamma correction - * to a simple alpha channel strip. + + /* Prevent the transformations being done again. + * + * NOTE: this is highly dubious; it removes the transformations in + * place. This seems inconsistent with the general treatment of the + * transformations elsewhere. */ - png_ptr->transformations &= ~PNG_BACKGROUND; - png_ptr->transformations &= ~PNG_GAMMA; - png_ptr->transformations |= PNG_STRIP_ALPHA; - } + png_ptr->transformations &= ~(PNG_COMPOSE | PNG_GAMMA); + } /* color_type == PNG_COLOR_TYPE_PALETTE */ + /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */ - else - /* color_type != PNG_COLOR_TYPE_PALETTE */ + else /* color_type != PNG_COLOR_TYPE_PALETTE */ { - double m = (double)(((png_uint_32)1 << png_ptr->bit_depth) - 1); - double g = 1.0; - double gs = 1.0; + int gs_sig, g_sig; + png_fixed_point g = PNG_FP_1; /* Correction to linear */ + png_fixed_point gs = PNG_FP_1; /* Correction to screen */ switch (png_ptr->background_gamma_type) { case PNG_BACKGROUND_GAMMA_SCREEN: - g = (png_ptr->screen_gamma); - gs = 1.0; + g = png_ptr->screen_gamma; + /* gs = PNG_FP_1; */ break; case PNG_BACKGROUND_GAMMA_FILE: - g = 1.0 / (png_ptr->gamma); - gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); + g = png_reciprocal(png_ptr->gamma); + gs = png_reciprocal2(png_ptr->gamma, png_ptr->screen_gamma); break; case PNG_BACKGROUND_GAMMA_UNIQUE: - g = 1.0 / (png_ptr->background_gamma); - gs = 1.0 / (png_ptr->background_gamma * - png_ptr->screen_gamma); + g = png_reciprocal(png_ptr->background_gamma); + gs = png_reciprocal2(png_ptr->background_gamma, + png_ptr->screen_gamma); break; + + default: + png_error(png_ptr, "invalid background gamma type"); } - png_ptr->background_1.gray = (png_uint_16)(pow( - (double)png_ptr->background.gray / m, g) * m + .5); - png_ptr->background.gray = (png_uint_16)(pow( - (double)png_ptr->background.gray / m, gs) * m + .5); + g_sig = png_gamma_significant(g); + gs_sig = png_gamma_significant(gs); + + if (g_sig) + png_ptr->background_1.gray = png_gamma_correct(png_ptr, + png_ptr->background.gray, g); + + if (gs_sig) + png_ptr->background.gray = png_gamma_correct(png_ptr, + png_ptr->background.gray, gs); if ((png_ptr->background.red != png_ptr->background.green) || (png_ptr->background.red != png_ptr->background.blue) || (png_ptr->background.red != png_ptr->background.gray)) { /* RGB or RGBA with color background */ - png_ptr->background_1.red = (png_uint_16)(pow( - (double)png_ptr->background.red / m, g) * m + .5); - png_ptr->background_1.green = (png_uint_16)(pow( - (double)png_ptr->background.green / m, g) * m + .5); - png_ptr->background_1.blue = (png_uint_16)(pow( - (double)png_ptr->background.blue / m, g) * m + .5); - png_ptr->background.red = (png_uint_16)(pow( - (double)png_ptr->background.red / m, gs) * m + .5); - png_ptr->background.green = (png_uint_16)(pow( - (double)png_ptr->background.green / m, gs) * m + .5); - png_ptr->background.blue = (png_uint_16)(pow( - (double)png_ptr->background.blue / m, gs) * m + .5); + if (g_sig) + { + png_ptr->background_1.red = png_gamma_correct(png_ptr, + png_ptr->background.red, g); + + png_ptr->background_1.green = png_gamma_correct(png_ptr, + png_ptr->background.green, g); + + png_ptr->background_1.blue = png_gamma_correct(png_ptr, + png_ptr->background.blue, g); + } + + if (gs_sig) + { + png_ptr->background.red = png_gamma_correct(png_ptr, + png_ptr->background.red, gs); + + png_ptr->background.green = png_gamma_correct(png_ptr, + png_ptr->background.green, gs); + + png_ptr->background.blue = png_gamma_correct(png_ptr, + png_ptr->background.blue, gs); + } } + else { /* GRAY, GRAY ALPHA, RGB, or RGBA with gray background */ png_ptr->background_1.red = png_ptr->background_1.green - = png_ptr->background_1.blue = png_ptr->background_1.gray; + = png_ptr->background_1.blue = png_ptr->background_1.gray; + png_ptr->background.red = png_ptr->background.green - = png_ptr->background.blue = png_ptr->background.gray; + = png_ptr->background.blue = png_ptr->background.gray; } - } - } + + /* The background is now in screen gamma: */ + png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_SCREEN; + } /* color_type != PNG_COLOR_TYPE_PALETTE */ + }/* png_ptr->transformations & PNG_BACKGROUND */ + else /* Transformation does not include PNG_BACKGROUND */ #endif /* PNG_READ_BACKGROUND_SUPPORTED */ - if (color_type == PNG_COLOR_TYPE_PALETTE) + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { png_colorp palette = png_ptr->palette; int num_palette = png_ptr->num_palette; int i; + /*NOTE: there are other transformations that should probably be in here + * too. + */ for (i = 0; i < num_palette; i++) { palette[i].red = png_ptr->gamma_table[palette[i].red]; @@ -1081,16 +1744,17 @@ png_init_read_transformations(png_structp png_ptr) /* Done the gamma correction. */ png_ptr->transformations &= ~PNG_GAMMA; - } + } /* color_type == PALETTE && !PNG_BACKGROUND transformation */ } #ifdef PNG_READ_BACKGROUND_SUPPORTED else #endif -#endif /* PNG_READ_GAMMA_SUPPORTED && PNG_FLOATING_POINT_SUPPORTED */ +#endif /* PNG_READ_GAMMA_SUPPORTED */ + #ifdef PNG_READ_BACKGROUND_SUPPORTED - /* No GAMMA transformation */ - if ((png_ptr->transformations & PNG_BACKGROUND) && - (color_type == PNG_COLOR_TYPE_PALETTE)) + /* No GAMMA transformation (see the hanging else 4 lines above) */ + if ((png_ptr->transformations & PNG_COMPOSE) && + (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)) { int i; int istop = (int)png_ptr->num_trans; @@ -1107,54 +1771,64 @@ png_init_read_transformations(png_structp png_ptr) { palette[i] = back; } + else if (png_ptr->trans_alpha[i] != 0xff) { /* The png_composite() macro is defined in png.h */ png_composite(palette[i].red, palette[i].red, - png_ptr->trans_alpha[i], back.red); + png_ptr->trans_alpha[i], back.red); + png_composite(palette[i].green, palette[i].green, - png_ptr->trans_alpha[i], back.green); + png_ptr->trans_alpha[i], back.green); + png_composite(palette[i].blue, palette[i].blue, - png_ptr->trans_alpha[i], back.blue); + png_ptr->trans_alpha[i], back.blue); } } - /* Handled alpha, still need to strip the channel. */ - png_ptr->transformations &= ~PNG_BACKGROUND; - png_ptr->transformations |= PNG_STRIP_ALPHA; + png_ptr->transformations &= ~PNG_COMPOSE; } #endif /* PNG_READ_BACKGROUND_SUPPORTED */ #ifdef PNG_READ_SHIFT_SUPPORTED if ((png_ptr->transformations & PNG_SHIFT) && - (color_type == PNG_COLOR_TYPE_PALETTE)) + (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)) { - png_uint_16 i; - png_uint_16 istop = png_ptr->num_palette; - int sr = 8 - png_ptr->sig_bit.red; - int sg = 8 - png_ptr->sig_bit.green; - int sb = 8 - png_ptr->sig_bit.blue; - - if (sr < 0 || sr > 8) - sr = 0; - if (sg < 0 || sg > 8) - sg = 0; - if (sb < 0 || sb > 8) - sb = 0; - for (i = 0; i < istop; i++) + int i; + int istop = png_ptr->num_palette; + int shift = 8 - png_ptr->sig_bit.red; + + /* significant bits can be in the range 1 to 7 for a meaninful result, if + * the number of significant bits is 0 then no shift is done (this is an + * error condition which is silently ignored.) + */ + if (shift > 0 && shift < 8) for (i=0; ipalette[i].red; + + component >>= shift; + png_ptr->palette[i].red = (png_byte)component; + } + + shift = 8 - png_ptr->sig_bit.green; + if (shift > 0 && shift < 8) for (i=0; ipalette[i].green; + + component >>= shift; + png_ptr->palette[i].green = (png_byte)component; + } + + shift = 8 - png_ptr->sig_bit.blue; + if (shift > 0 && shift < 8) for (i=0; ipalette[i].red >>= sr; - png_ptr->palette[i].green >>= sg; - png_ptr->palette[i].blue >>= sb; + int component = png_ptr->palette[i].blue; + + component >>= shift; + png_ptr->palette[i].blue = (png_byte)component; } } #endif /* PNG_READ_SHIFT_SUPPORTED */ - } -#if !defined(PNG_READ_GAMMA_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) \ - && !defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr) - return; -#endif } /* Modify the info structure to reflect the transformations. The @@ -1171,11 +1845,16 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) { if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { - if (png_ptr->num_trans && - (png_ptr->transformations & PNG_EXPAND_tRNS)) + /* This check must match what actually happens in + * png_do_expand_palette; if it ever checks the tRNS chunk to see if + * it is all opaque we must do the same (at present it does not.) + */ + if (png_ptr->num_trans > 0) info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA; + else info_ptr->color_type = PNG_COLOR_TYPE_RGB; + info_ptr->bit_depth = 8; info_ptr->num_trans = 0; } @@ -1184,49 +1863,82 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) if (png_ptr->num_trans) { if (png_ptr->transformations & PNG_EXPAND_tRNS) - info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; + info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; } if (info_ptr->bit_depth < 8) info_ptr->bit_depth = 8; + info_ptr->num_trans = 0; } } #endif -#ifdef PNG_READ_BACKGROUND_SUPPORTED - if (png_ptr->transformations & PNG_BACKGROUND) - { - info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA; - info_ptr->num_trans = 0; +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) + /* The following is almost certainly wrong unless the background value is in + * the screen space! + */ + if (png_ptr->transformations & PNG_COMPOSE) info_ptr->background = png_ptr->background; - } #endif #ifdef PNG_READ_GAMMA_SUPPORTED - if (png_ptr->transformations & PNG_GAMMA) - { -#ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->gamma = png_ptr->gamma; -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = png_ptr->int_gamma; -#endif - } + /* The following used to be conditional on PNG_GAMMA (prior to 1.5.4), + * however it seems that the code in png_init_read_transformations, which has + * been called before this from png_read_update_info->png_read_start_row + * sometimes does the gamma transform and cancels the flag. + */ + info_ptr->gamma = png_ptr->gamma; #endif -#ifdef PNG_READ_16_TO_8_SUPPORTED - if ((png_ptr->transformations & PNG_16_TO_8) && (info_ptr->bit_depth == 16)) - info_ptr->bit_depth = 8; -#endif + if (info_ptr->bit_depth == 16) + { +# ifdef PNG_READ_16BIT_SUPPORTED +# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + if (png_ptr->transformations & PNG_SCALE_16_TO_8) + info_ptr->bit_depth = 8; +# endif + +# ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + if (png_ptr->transformations & PNG_16_TO_8) + info_ptr->bit_depth = 8; +# endif + +# else + /* No 16 bit support: force chopping 16-bit input down to 8, in this case + * the app program can chose if both APIs are available by setting the + * correct scaling to use. + */ +# ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + /* For compatibility with previous versions use the strip method by + * default. This code works because if PNG_SCALE_16_TO_8 is already + * set the code below will do that in preference to the chop. + */ + png_ptr->transformations |= PNG_16_TO_8; + info_ptr->bit_depth = 8; +# else + +# if PNG_READ_SCALE_16_TO_8_SUPPORTED + png_ptr->transformations |= PNG_SCALE_16_TO_8; + info_ptr->bit_depth = 8; +# else + + CONFIGURATION ERROR: you must enable at least one 16 to 8 method +# endif +# endif +#endif /* !READ_16BIT_SUPPORTED */ + } #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED if (png_ptr->transformations & PNG_GRAY_TO_RGB) - info_ptr->color_type |= PNG_COLOR_MASK_COLOR; + info_ptr->color_type = (png_byte)(info_ptr->color_type | + PNG_COLOR_MASK_COLOR); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED if (png_ptr->transformations & PNG_RGB_TO_GRAY) - info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR; + info_ptr->color_type = (png_byte)(info_ptr->color_type & + ~PNG_COLOR_MASK_COLOR); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED @@ -1241,6 +1953,14 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) } #endif +#ifdef PNG_READ_EXPAND_16_SUPPORTED + if (png_ptr->transformations & PNG_EXPAND_16 && info_ptr->bit_depth == 8 && + info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) + { + info_ptr->bit_depth = 16; + } +#endif + #ifdef PNG_READ_PACK_SUPPORTED if ((png_ptr->transformations & PNG_PACK) && (info_ptr->bit_depth < 8)) info_ptr->bit_depth = 8; @@ -1248,14 +1968,20 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) info_ptr->channels = 1; + else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) info_ptr->channels = 3; + else info_ptr->channels = 1; #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - if (png_ptr->flags & PNG_FLAG_STRIP_ALPHA) - info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA; + if (png_ptr->transformations & PNG_STRIP_ALPHA) + { + info_ptr->color_type = (png_byte)(info_ptr->color_type & + ~PNG_COLOR_MASK_ALPHA); + info_ptr->num_trans = 0; + } #endif if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) @@ -1270,26 +1996,35 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) info_ptr->channels++; /* If adding a true alpha channel not just filler */ if (png_ptr->transformations & PNG_ADD_ALPHA) - info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; + info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; } #endif #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \ defined(PNG_READ_USER_TRANSFORM_SUPPORTED) if (png_ptr->transformations & PNG_USER_TRANSFORM) - { - if (info_ptr->bit_depth < png_ptr->user_transform_depth) + { + if (info_ptr->bit_depth < png_ptr->user_transform_depth) info_ptr->bit_depth = png_ptr->user_transform_depth; - if (info_ptr->channels < png_ptr->user_transform_channels) + + if (info_ptr->channels < png_ptr->user_transform_channels) info_ptr->channels = png_ptr->user_transform_channels; - } + } #endif info_ptr->pixel_depth = (png_byte)(info_ptr->channels * - info_ptr->bit_depth); + info_ptr->bit_depth); info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, info_ptr->width); + /* Adding in 1.5.4: cache the above value in png_struct so that we can later + * check in png_rowbytes that the user buffer won't get overwritten. Note + * that the field is not always set - if png_read_update_info isn't called + * the application has to either not do any transforms or get the calculation + * right itself. + */ + png_ptr->info_rowbytes = info_ptr->rowbytes; + #ifndef PNG_READ_EXPAND_SUPPORTED if (png_ptr) return; @@ -1301,75 +2036,80 @@ defined(PNG_READ_USER_TRANSFORM_SUPPORTED) * decide how it fits in with the other transformations here. */ void /* PRIVATE */ -png_do_read_transformations(png_structp png_ptr) +png_do_read_transformations(png_structp png_ptr, png_row_infop row_info) { png_debug(1, "in png_do_read_transformations"); if (png_ptr->row_buf == NULL) { -#ifdef PNG_STDIO_SUPPORTED - char msg[50]; - - png_snprintf2(msg, 50, - "NULL row buffer for row %ld, pass %d", (long)png_ptr->row_number, - png_ptr->pass); - png_error(png_ptr, msg); -#else + /* Prior to 1.5.4 this output row/pass where the NULL pointer is, but this + * error is incredibly rare and incredibly easy to debug without this + * information. + */ png_error(png_ptr, "NULL row buffer"); -#endif } -#ifdef PNG_WARN_UNINITIALIZED_ROW - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - /* Application has failed to call either png_read_start_image() - * or png_read_update_info() after setting transforms that expand - * pixels. This check added to libpng-1.2.19 + + /* The following is debugging; prior to 1.5.4 the code was never compiled in; + * in 1.5.4 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro + * PNG_WARN_UNINITIALIZED_ROW removed. In 1.5 the new flag is set only for + * selected new APIs to ensure that there is no API change. + */ + if ((png_ptr->flags & PNG_FLAG_DETECT_UNINITIALIZED) != 0 && + !(png_ptr->flags & PNG_FLAG_ROW_INIT)) + { + /* Application has failed to call either png_read_start_image() or + * png_read_update_info() after setting transforms that expand pixels. + * This check added to libpng-1.2.19 (but not enabled until 1.5.4). */ -#if (PNG_WARN_UNINITIALIZED_ROW==1) png_error(png_ptr, "Uninitialized row"); -#else - png_warning(png_ptr, "Uninitialized row"); -#endif -#endif + } #ifdef PNG_READ_EXPAND_SUPPORTED if (png_ptr->transformations & PNG_EXPAND) { - if (png_ptr->row_info.color_type == PNG_COLOR_TYPE_PALETTE) + if (row_info->color_type == PNG_COLOR_TYPE_PALETTE) { - png_do_expand_palette(&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans); + png_do_expand_palette(row_info, png_ptr->row_buf + 1, + png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans); } + else { if (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND_tRNS)) - png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->trans_color)); + png_do_expand(row_info, png_ptr->row_buf + 1, + &(png_ptr->trans_color)); + else - png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1, - NULL); + png_do_expand(row_info, png_ptr->row_buf + 1, + NULL); } } #endif #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - if (png_ptr->flags & PNG_FLAG_STRIP_ALPHA) - png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, - PNG_FLAG_FILLER_AFTER | (png_ptr->flags & PNG_FLAG_STRIP_ALPHA)); + if ((png_ptr->transformations & PNG_STRIP_ALPHA) && + !(png_ptr->transformations & PNG_COMPOSE) && + (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + 0 /* at_start == false, because SWAP_ALPHA happens later */); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED if (png_ptr->transformations & PNG_RGB_TO_GRAY) { int rgb_error = - png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info), - png_ptr->row_buf + 1); + png_do_rgb_to_gray(png_ptr, row_info, + png_ptr->row_buf + 1); + if (rgb_error) { png_ptr->rgb_to_gray_status=1; if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == PNG_RGB_TO_GRAY_WARN) png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel"); + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == PNG_RGB_TO_GRAY_ERR) png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel"); @@ -1414,105 +2154,131 @@ png_do_read_transformations(png_structp png_ptr) */ if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); #endif -#ifdef PNG_READ_BACKGROUND_SUPPORTED - if ((png_ptr->transformations & PNG_BACKGROUND) && - ((png_ptr->num_trans != 0 ) || - (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) - png_do_background(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->trans_color), &(png_ptr->background) -#ifdef PNG_READ_GAMMA_SUPPORTED - , &(png_ptr->background_1), - png_ptr->gamma_table, png_ptr->gamma_from_1, - png_ptr->gamma_to_1, png_ptr->gamma_16_table, - png_ptr->gamma_16_from_1, png_ptr->gamma_16_to_1, - png_ptr->gamma_shift -#endif -); +#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ + (defined PNG_READ_ALPHA_MODE_SUPPORTED) + if (png_ptr->transformations & PNG_COMPOSE) + png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr); #endif #ifdef PNG_READ_GAMMA_SUPPORTED if ((png_ptr->transformations & PNG_GAMMA) && -#ifdef PNG_READ_BACKGROUND_SUPPORTED - !((png_ptr->transformations & PNG_BACKGROUND) && +#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ + (defined PNG_READ_ALPHA_MODE_SUPPORTED) + !((png_ptr->transformations & PNG_COMPOSE) && ((png_ptr->num_trans != 0) || (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) && #endif (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)) - png_do_gamma(&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->gamma_table, png_ptr->gamma_16_table, - png_ptr->gamma_shift); + png_do_gamma(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) && + (png_ptr->transformations & PNG_COMPOSE) && + (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + 0 /* at_start == false, because SWAP_ALPHA happens later */); +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + if ((png_ptr->transformations & PNG_ENCODE_ALPHA) && + (row_info->color_type & PNG_COLOR_MASK_ALPHA)) + png_do_encode_alpha(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + if (png_ptr->transformations & PNG_SCALE_16_TO_8) + png_do_scale_16_to_8(row_info, png_ptr->row_buf + 1); #endif -#ifdef PNG_READ_16_TO_8_SUPPORTED +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + /* There is no harm in doing both of these because only one has any effect, + * by putting the 'scale' option first if the app asks for scale (either by + * calling the API or in a TRANSFORM flag) this is what happens. + */ if (png_ptr->transformations & PNG_16_TO_8) - png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_chop(row_info, png_ptr->row_buf + 1); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED if (png_ptr->transformations & PNG_QUANTIZE) { - png_do_quantize((png_row_infop)&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->palette_lookup, png_ptr->quantize_index); - if (png_ptr->row_info.rowbytes == (png_uint_32)0) + png_do_quantize(row_info, png_ptr->row_buf + 1, + png_ptr->palette_lookup, png_ptr->quantize_index); + + if (row_info->rowbytes == 0) png_error(png_ptr, "png_do_quantize returned rowbytes=0"); } +#endif /* PNG_READ_QUANTIZE_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_16_SUPPORTED + /* Do the expansion now, after all the arithmetic has been done. Notice + * that previous transformations can handle the PNG_EXPAND_16 flag if this + * is efficient (particularly true in the case of gamma correction, where + * better accuracy results faster!) + */ + if (png_ptr->transformations & PNG_EXPAND_16) + png_do_expand_16(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /*NOTE: moved here in 1.5.4 (from much later in this list.) */ + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && + (png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) + png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); #endif #ifdef PNG_READ_INVERT_SUPPORTED if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_invert(row_info, png_ptr->row_buf + 1); #endif #ifdef PNG_READ_SHIFT_SUPPORTED if (png_ptr->transformations & PNG_SHIFT) - png_do_unshift(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->shift)); + png_do_unshift(row_info, png_ptr->row_buf + 1, + &(png_ptr->shift)); #endif #ifdef PNG_READ_PACK_SUPPORTED if (png_ptr->transformations & PNG_PACK) - png_do_unpack(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_unpack(row_info, png_ptr->row_buf + 1); #endif #ifdef PNG_READ_BGR_SUPPORTED if (png_ptr->transformations & PNG_BGR) - png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_bgr(row_info, png_ptr->row_buf + 1); #endif #ifdef PNG_READ_PACKSWAP_SUPPORTED if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - /* If gray -> RGB, do so now only if we did not do so above */ - if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && - (png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_packswap(row_info, png_ptr->row_buf + 1); #endif #ifdef PNG_READ_FILLER_SUPPORTED if (png_ptr->transformations & PNG_FILLER) - png_do_read_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, - (png_uint_32)png_ptr->filler, png_ptr->flags); + png_do_read_filler(row_info, png_ptr->row_buf + 1, + (png_uint_32)png_ptr->filler, png_ptr->flags); #endif #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_read_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_read_invert_alpha(row_info, png_ptr->row_buf + 1); #endif #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_read_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_read_swap_alpha(row_info, png_ptr->row_buf + 1); #endif +#ifdef PNG_READ_16BIT_SUPPORTED #ifdef PNG_READ_SWAP_SUPPORTED if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_swap(row_info, png_ptr->row_buf + 1); +#endif #endif #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED @@ -1520,28 +2286,28 @@ png_do_read_transformations(png_structp png_ptr) { if (png_ptr->read_user_transform_fn != NULL) (*(png_ptr->read_user_transform_fn)) /* User read transform function */ - (png_ptr, /* png_ptr */ - &(png_ptr->row_info), /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_uint_32 rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ + (png_ptr, /* png_ptr */ + row_info, /* row_info: */ + /* png_uint_32 width; width of row */ + /* png_size_t rowbytes; number of bytes in row */ + /* png_byte color_type; color type of pixels */ + /* png_byte bit_depth; bit depth of samples */ + /* png_byte channels; number of channels (1-4) */ + /* png_byte pixel_depth; bits per pixel (depth*channels) */ + png_ptr->row_buf + 1); /* start of pixel data for row */ #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED if (png_ptr->user_transform_depth) - png_ptr->row_info.bit_depth = png_ptr->user_transform_depth; + row_info->bit_depth = png_ptr->user_transform_depth; + if (png_ptr->user_transform_channels) - png_ptr->row_info.channels = png_ptr->user_transform_channels; + row_info->channels = png_ptr->user_transform_channels; #endif - png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth * - png_ptr->row_info.channels); - png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth, - png_ptr->row_info.width); + row_info->pixel_depth = (png_byte)(row_info->bit_depth * + row_info->channels); + + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_info->width); } #endif - } #ifdef PNG_READ_PACK_SUPPORTED @@ -1571,11 +2337,13 @@ png_do_unpack(png_row_infop row_info, png_bytep row) for (i = 0; i < row_width; i++) { *dp = (png_byte)((*sp >> shift) & 0x01); + if (shift == 7) { shift = 0; sp--; } + else shift++; @@ -1593,11 +2361,13 @@ png_do_unpack(png_row_infop row_info, png_bytep row) for (i = 0; i < row_width; i++) { *dp = (png_byte)((*sp >> shift) & 0x03); + if (shift == 6) { shift = 0; sp--; } + else shift += 2; @@ -1614,11 +2384,13 @@ png_do_unpack(png_row_infop row_info, png_bytep row) for (i = 0; i < row_width; i++) { *dp = (png_byte)((*sp >> shift) & 0x0f); + if (shift == 4) { shift = 0; sp--; } + else shift = 4; @@ -1626,6 +2398,9 @@ png_do_unpack(png_row_infop row_info, png_bytep row) } break; } + + default: + break; } row_info->bit_depth = 8; row_info->pixel_depth = (png_byte)(8 * row_info->channels); @@ -1641,158 +2416,222 @@ png_do_unpack(png_row_infop row_info, png_bytep row) * the values back to 0 through 31. */ void /* PRIVATE */ -png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits) +png_do_unshift(png_row_infop row_info, png_bytep row, + png_const_color_8p sig_bits) { + int color_type; + png_debug(1, "in png_do_unshift"); - if ( - row_info->color_type != PNG_COLOR_TYPE_PALETTE) + /* The palette case has already been handled in the _init routine. */ + color_type = row_info->color_type; + + if (color_type != PNG_COLOR_TYPE_PALETTE) { int shift[4]; int channels = 0; - int c; - png_uint_16 value = 0; - png_uint_32 row_width = row_info->width; + int bit_depth = row_info->bit_depth; - if (row_info->color_type & PNG_COLOR_MASK_COLOR) + if (color_type & PNG_COLOR_MASK_COLOR) { - shift[channels++] = row_info->bit_depth - sig_bits->red; - shift[channels++] = row_info->bit_depth - sig_bits->green; - shift[channels++] = row_info->bit_depth - sig_bits->blue; + shift[channels++] = bit_depth - sig_bits->red; + shift[channels++] = bit_depth - sig_bits->green; + shift[channels++] = bit_depth - sig_bits->blue; } + else { - shift[channels++] = row_info->bit_depth - sig_bits->gray; + shift[channels++] = bit_depth - sig_bits->gray; } - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) + + if (color_type & PNG_COLOR_MASK_ALPHA) { - shift[channels++] = row_info->bit_depth - sig_bits->alpha; + shift[channels++] = bit_depth - sig_bits->alpha; } - for (c = 0; c < channels; c++) { - if (shift[c] <= 0) - shift[c] = 0; - else - value = 1; - } + int c, have_shift; - if (!value) - return; + for (c = have_shift = 0; c < channels; ++c) + { + /* A shift of more than the bit depth is an error condition but it + * gets ignored here. + */ + if (shift[c] <= 0 || shift[c] >= bit_depth) + shift[c] = 0; - switch (row_info->bit_depth) + else + have_shift = 1; + } + + if (!have_shift) + return; + } + + switch (bit_depth) { + default: + /* Must be 1bpp gray: should not be here! */ + /* NOTREACHED */ + break; + case 2: + /* Must be 2bpp gray */ + /* assert(channels == 1 && shift[0] == 1) */ { - png_bytep bp; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; + png_bytep bp = row; + png_bytep bp_end = bp + row_info->rowbytes; - for (bp = row, i = 0; i < istop; i++) + while (bp < bp_end) { - *bp >>= 1; - *bp++ &= 0x55; + int b = (*bp >> 1) & 0x55; + *bp++ = (png_byte)b; } break; } case 4: + /* Must be 4bpp gray */ + /* assert(channels == 1) */ { png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_byte mask = (png_byte)((((int)0xf0 >> shift[0]) & (int)0xf0) | - (png_byte)((int)0xf >> shift[0])); + png_bytep bp_end = bp + row_info->rowbytes; + int gray_shift = shift[0]; + int mask = 0xf >> gray_shift; - for (i = 0; i < istop; i++) + mask |= mask << 4; + + while (bp < bp_end) { - *bp >>= shift[0]; - *bp++ &= mask; + int b = (*bp >> gray_shift) & mask; + *bp++ = (png_byte)b; } break; } case 8: + /* Single byte components, G, GA, RGB, RGBA */ { png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = row_width * channels; + png_bytep bp_end = bp + row_info->rowbytes; + int channel = 0; - for (i = 0; i < istop; i++) + while (bp < bp_end) { - *bp++ >>= shift[i%channels]; + int b = *bp >> shift[channel]; + if (++channel >= channels) + channel = 0; + *bp++ = (png_byte)b; } break; } +#ifdef PNG_READ_16BIT_SUPPORTED case 16: + /* Double byte components, G, GA, RGB, RGBA */ { png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = channels * row_width; + png_bytep bp_end = bp + row_info->rowbytes; + int channel = 0; - for (i = 0; i < istop; i++) + while (bp < bp_end) { - value = (png_uint_16)((*bp << 8) + *(bp + 1)); - value >>= shift[i%channels]; + int value = (bp[0] << 8) + bp[1]; + + value >>= shift[channel]; + if (++channel >= channels) + channel = 0; *bp++ = (png_byte)(value >> 8); *bp++ = (png_byte)(value & 0xff); } break; } +#endif } } } #endif -#ifdef PNG_READ_16_TO_8_SUPPORTED -/* Chop rows of bit depth 16 down to 8 */ +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED +/* Scale rows of bit depth 16 down to 8 accurately */ void /* PRIVATE */ -png_do_chop(png_row_infop row_info, png_bytep row) +png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) { - png_debug(1, "in png_do_chop"); + png_debug(1, "in png_do_scale_16_to_8"); if (row_info->bit_depth == 16) { - png_bytep sp = row; - png_bytep dp = row; - png_uint_32 i; - png_uint_32 istop = row_info->width * row_info->channels; + png_bytep sp = row; /* source */ + png_bytep dp = row; /* destinaton */ + png_bytep ep = sp + row_info->rowbytes; /* end+1 */ - for (i = 0; i> 8)) >> 8; - * - * Approximate calculation with shift/add instead of multiply/divide: - * *dp = ((((png_uint_32)(*sp) << 8) | - * (png_uint_32)((int)(*(sp + 1)) - *sp)) + 128) >> 8; - * - * What we actually do to avoid extra shifting and conversion: - */ + /* The input is an array of 16 bit components, these must be scaled to + * 8 bits each. For a 16 bit value V the required value (from the PNG + * specification) is: + * + * (V * 255) / 65535 + * + * This reduces to round(V / 257), or floor((V + 128.5)/257) + * + * Represent V as the two byte value vhi.vlo. Make a guess that the + * result is the top byte of V, vhi, then the correction to this value + * is: + * + * error = floor(((V-vhi.vhi) + 128.5) / 257) + * = floor(((vlo-vhi) + 128.5) / 257) + * + * This can be approximated using integer arithmetic (and a signed + * shift): + * + * error = (vlo-vhi+128) >> 8; + * + * The approximate differs from the exact answer only when (vlo-vhi) is + * 128; it then gives a correction of +1 when the exact correction is + * 0. This gives 128 errors. The exact answer (correct for all 16 bit + * input values) is: + * + * error = (vlo-vhi+128)*65535 >> 24; + * + * An alternative arithmetic calculation which also gives no errors is: + * + * (V * 255 + 32895) >> 16 + */ - *dp = *sp + ((((int)(*(sp + 1)) - *sp) > 128) ? 1 : 0); -#else - /* Simply discard the low order byte */ - *dp = *sp; + png_int_32 tmp = *sp++; /* must be signed! */ + tmp += (((int)*sp++ - tmp + 128) * 65535) >> 24; + *dp++ = (png_byte)tmp; + } + + row_info->bit_depth = 8; + row_info->pixel_depth = (png_byte)(8 * row_info->channels); + row_info->rowbytes = row_info->width * row_info->channels; + } +} #endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED +void /* PRIVATE */ +/* Simply discard the low byte. This was the default behavior prior + * to libpng-1.5.4. + */ +png_do_chop(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_chop"); + + if (row_info->bit_depth == 16) + { + png_bytep sp = row; /* source */ + png_bytep dp = row; /* destinaton */ + png_bytep ep = sp + row_info->rowbytes; /* end+1 */ + + while (sp < ep) + { + *dp++ = *sp; + sp += 2; /* skip low byte */ } + row_info->bit_depth = 8; row_info->pixel_depth = (png_byte)(8 * row_info->channels); row_info->rowbytes = row_info->width * row_info->channels; @@ -1827,6 +2666,8 @@ png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) *(--dp) = save; } } + +#ifdef PNG_READ_16BIT_SUPPORTED /* This converts from RRGGBBAA to AARRGGBB */ else { @@ -1849,7 +2690,9 @@ png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) *(--dp) = save[1]; } } +#endif } + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { /* This converts from GA to AG */ @@ -1867,6 +2710,8 @@ png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) *(--dp) = save; } } + +#ifdef PNG_READ_16BIT_SUPPORTED /* This converts from GGAA to AAGG */ else { @@ -1885,6 +2730,7 @@ png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) *(--dp) = save[1]; } } +#endif } } } @@ -1894,94 +2740,99 @@ png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) void /* PRIVATE */ png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) { + png_uint_32 row_width; png_debug(1, "in png_do_read_invert_alpha"); + row_width = row_info->width; + if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { - png_uint_32 row_width = row_info->width; - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + if (row_info->bit_depth == 8) { /* This inverts the alpha channel in RGBA */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = (png_byte)(255 - *(--sp)); + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_uint_32 i; -/* This does nothing: - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - We can replace it with: + for (i = 0; i < row_width; i++) + { + *(--dp) = (png_byte)(255 - *(--sp)); + +/* This does nothing: + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + We can replace it with: */ - sp-=3; - dp=sp; - } + sp-=3; + dp=sp; } - /* This inverts the alpha channel in RRGGBBAA */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; + } - for (i = 0; i < row_width; i++) - { - *(--dp) = (png_byte)(255 - *(--sp)); - *(--dp) = (png_byte)(255 - *(--sp)); +#ifdef PNG_READ_16BIT_SUPPORTED + /* This inverts the alpha channel in RRGGBBAA */ + else + { + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_uint_32 i; -/* This does nothing: - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - We can replace it with: + for (i = 0; i < row_width; i++) + { + *(--dp) = (png_byte)(255 - *(--sp)); + *(--dp) = (png_byte)(255 - *(--sp)); + +/* This does nothing: + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + We can replace it with: */ - sp-=6; - dp=sp; - } + sp-=6; + dp=sp; } } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) +#endif + } + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + { + if (row_info->bit_depth == 8) { /* This inverts the alpha channel in GA */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_uint_32 i; - for (i = 0; i < row_width; i++) - { - *(--dp) = (png_byte)(255 - *(--sp)); - *(--dp) = *(--sp); - } + for (i = 0; i < row_width; i++) + { + *(--dp) = (png_byte)(255 - *(--sp)); + *(--dp) = *(--sp); } + } + +#ifdef PNG_READ_16BIT_SUPPORTED + else + { /* This inverts the alpha channel in GGAA */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_uint_32 i; - for (i = 0; i < row_width; i++) - { - *(--dp) = (png_byte)(255 - *(--sp)); - *(--dp) = (png_byte)(255 - *(--sp)); + for (i = 0; i < row_width; i++) + { + *(--dp) = (png_byte)(255 - *(--sp)); + *(--dp) = (png_byte)(255 - *(--sp)); /* - *(--dp) = *(--sp); - *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); */ - sp-=2; - dp=sp; - } + sp-=2; + dp=sp; } } +#endif } } #endif @@ -1990,12 +2841,14 @@ png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) /* Add filler channel if we have RGB color */ void /* PRIVATE */ png_do_read_filler(png_row_infop row_info, png_bytep row, - png_uint_32 filler, png_uint_32 flags) + png_uint_32 filler, png_uint_32 flags) { png_uint_32 i; png_uint_32 row_width = row_info->width; +#ifdef PNG_READ_16BIT_SUPPORTED png_byte hi_filler = (png_byte)((filler>>8) & 0xff); +#endif png_byte lo_filler = (png_byte)(filler & 0xff); png_debug(1, "in png_do_read_filler"); @@ -2005,9 +2858,9 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, { if (row_info->bit_depth == 8) { - /* This changes the data from G to GX */ if (flags & PNG_FLAG_FILLER_AFTER) { + /* This changes the data from G to GX */ png_bytep sp = row + (png_size_t)row_width; png_bytep dp = sp + (png_size_t)row_width; for (i = 1; i < row_width; i++) @@ -2020,9 +2873,10 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, row_info->pixel_depth = 16; row_info->rowbytes = row_width * 2; } - /* This changes the data from G to XG */ + else { + /* This changes the data from G to XG */ png_bytep sp = row + (png_size_t)row_width; png_bytep dp = sp + (png_size_t)row_width; for (i = 0; i < row_width; i++) @@ -2035,11 +2889,13 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, row_info->rowbytes = row_width * 2; } } + +#ifdef PNG_READ_16BIT_SUPPORTED else if (row_info->bit_depth == 16) { - /* This changes the data from GG to GGXX */ if (flags & PNG_FLAG_FILLER_AFTER) { + /* This changes the data from GG to GGXX */ png_bytep sp = row + (png_size_t)row_width * 2; png_bytep dp = sp + (png_size_t)row_width * 2; for (i = 1; i < row_width; i++) @@ -2055,9 +2911,10 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, row_info->pixel_depth = 32; row_info->rowbytes = row_width * 4; } - /* This changes the data from GG to XXGG */ + else { + /* This changes the data from GG to XXGG */ png_bytep sp = row + (png_size_t)row_width * 2; png_bytep dp = sp + (png_size_t)row_width * 2; for (i = 0; i < row_width; i++) @@ -2072,14 +2929,15 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, row_info->rowbytes = row_width * 4; } } +#endif } /* COLOR_TYPE == GRAY */ else if (row_info->color_type == PNG_COLOR_TYPE_RGB) { if (row_info->bit_depth == 8) { - /* This changes the data from RGB to RGBX */ if (flags & PNG_FLAG_FILLER_AFTER) { + /* This changes the data from RGB to RGBX */ png_bytep sp = row + (png_size_t)row_width * 3; png_bytep dp = sp + (png_size_t)row_width; for (i = 1; i < row_width; i++) @@ -2094,9 +2952,10 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, row_info->pixel_depth = 32; row_info->rowbytes = row_width * 4; } - /* This changes the data from RGB to XRGB */ + else { + /* This changes the data from RGB to XRGB */ png_bytep sp = row + (png_size_t)row_width * 3; png_bytep dp = sp + (png_size_t)row_width; for (i = 0; i < row_width; i++) @@ -2111,11 +2970,13 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, row_info->rowbytes = row_width * 4; } } + +#ifdef PNG_READ_16BIT_SUPPORTED else if (row_info->bit_depth == 16) { - /* This changes the data from RRGGBB to RRGGBBXX */ if (flags & PNG_FLAG_FILLER_AFTER) { + /* This changes the data from RRGGBB to RRGGBBXX */ png_bytep sp = row + (png_size_t)row_width * 6; png_bytep dp = sp + (png_size_t)row_width * 2; for (i = 1; i < row_width; i++) @@ -2135,9 +2996,10 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, row_info->pixel_depth = 64; row_info->rowbytes = row_width * 8; } - /* This changes the data from RRGGBB to XXRRGGBB */ + else { + /* This changes the data from RRGGBB to XXRRGGBB */ png_bytep sp = row + (png_size_t)row_width * 6; png_bytep dp = sp + (png_size_t)row_width * 2; for (i = 0; i < row_width; i++) @@ -2151,11 +3013,13 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, *(--dp) = hi_filler; *(--dp) = lo_filler; } + row_info->channels = 4; row_info->pixel_depth = 64; row_info->rowbytes = row_width * 8; } } +#endif } /* COLOR_TYPE == RGB */ } #endif @@ -2171,12 +3035,13 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) png_debug(1, "in png_do_gray_to_rgb"); if (row_info->bit_depth >= 8 && - !(row_info->color_type & PNG_COLOR_MASK_COLOR)) + !(row_info->color_type & PNG_COLOR_MASK_COLOR)) { if (row_info->color_type == PNG_COLOR_TYPE_GRAY) { if (row_info->bit_depth == 8) { + /* This changes G to RGB */ png_bytep sp = row + (png_size_t)row_width - 1; png_bytep dp = sp + (png_size_t)row_width * 2; for (i = 0; i < row_width; i++) @@ -2186,8 +3051,10 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) *(dp--) = *(sp--); } } + else { + /* This changes GG to RRGGBB */ png_bytep sp = row + (png_size_t)row_width * 2 - 1; png_bytep dp = sp + (png_size_t)row_width * 4; for (i = 0; i < row_width; i++) @@ -2201,10 +3068,12 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) } } } + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { if (row_info->bit_depth == 8) { + /* This changes GA to RGBA */ png_bytep sp = row + (png_size_t)row_width * 2 - 1; png_bytep dp = sp + (png_size_t)row_width * 2; for (i = 0; i < row_width; i++) @@ -2215,8 +3084,10 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) *(dp--) = *(sp--); } } + else { + /* This changes GGAA to RRGGBBAA */ png_bytep sp = row + (png_size_t)row_width * 4 - 1; png_bytep dp = sp + (png_size_t)row_width * 4; for (i = 0; i < row_width; i++) @@ -2232,10 +3103,10 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) } } } - row_info->channels += (png_byte)2; + row_info->channels = (png_byte)(row_info->channels + 2); row_info->color_type |= PNG_COLOR_MASK_COLOR; row_info->pixel_depth = (png_byte)(row_info->channels * - row_info->bit_depth); + row_info->bit_depth); row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); } } @@ -2243,264 +3114,258 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED /* Reduce RGB files to grayscale, with or without alpha - * using the equation given in Poynton's ColorFAQ at - * (THIS LINK IS DEAD June 2008) - * New link: - * + * using the equation given in Poynton's ColorFAQ of 1998-01-04 at + * (THIS LINK IS DEAD June 2008 but + * versions dated 1998 through November 2002 have been archived at + * http://web.archive.org/web/20000816232553/http://www.inforamp.net/ + * ~poynton/notes/colour_and_gamma/ColorFAQ.txt ) * Charles Poynton poynton at poynton.com * * Y = 0.212671 * R + 0.715160 * G + 0.072169 * B * - * We approximate this with + * which can be expressed with integers as + * + * Y = (6969 * R + 23434 * G + 2365 * B)/32768 + * + * Poynton's current link (as of January 2003 through July 2011): + * + * has changed the numbers slightly: * - * Y = 0.21268 * R + 0.7151 * G + 0.07217 * B + * Y = 0.2126*R + 0.7152*G + 0.0722*B * * which can be expressed with integers as * - * Y = (6969 * R + 23434 * G + 2365 * B)/32768 + * Y = (6966 * R + 23436 * G + 2366 * B)/32768 + * + * Historically, however, libpng uses numbers derived from the ITU-R Rec 709 + * end point chromaticities and the D65 white point. Depending on the + * precision used for the D65 white point this produces a variety of different + * numbers, however if the four decimal place value used in ITU-R Rec 709 is + * used (0.3127,0.3290) the Y calculation would be: + * + * Y = (6968 * R + 23435 * G + 2366 * B)/32768 + * + * While this is correct the rounding results in an overflow for white, because + * the sum of the rounded coefficients is 32769, not 32768. Consequently + * libpng uses, instead, the closest non-overflowing approximation: * - * The calculation is to be done in a linear colorspace. + * Y = (6968 * R + 23434 * G + 2366 * B)/32768 * - * Other integer coefficents can be used via png_set_rgb_to_gray(). + * Starting with libpng-1.5.5, if the image being converted has a cHRM chunk + * (including an sRGB chunk) then the chromaticities are used to calculate the + * coefficients. See the chunk handling in pngrutil.c for more information. + * + * In all cases the calculation is to be done in a linear colorspace. If no + * gamma information is available to correct the encoding of the original RGB + * values this results in an implicit assumption that the original PNG RGB + * values were linear. + * + * Other integer coefficents can be used via png_set_rgb_to_gray(). Because + * the API takes just red and green coefficients the blue coefficient is + * calculated to make the sum 32768. This will result in different rounding + * to that used above. */ int /* PRIVATE */ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) { - png_uint_32 i; - - png_uint_32 row_width = row_info->width; int rgb_error = 0; png_debug(1, "in png_do_rgb_to_gray"); - if ( - (row_info->color_type & PNG_COLOR_MASK_COLOR)) + if (!(row_info->color_type & PNG_COLOR_MASK_PALETTE) && + (row_info->color_type & PNG_COLOR_MASK_COLOR)) { - png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff; - png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff; - png_uint_32 bc = png_ptr->rgb_to_gray_blue_coeff; + PNG_CONST png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff; + PNG_CONST png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff; + PNG_CONST png_uint_32 bc = 32768 - rc - gc; + PNG_CONST png_uint_32 row_width = row_info->width; + PNG_CONST int have_alpha = + (row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0; - if (row_info->color_type == PNG_COLOR_TYPE_RGB) + if (row_info->bit_depth == 8) { - if (row_info->bit_depth == 8) - { #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL) - { - png_bytep sp = row; - png_bytep dp = row; + /* Notice that gamma to/from 1 are not necessarily inverses (if + * there is an overall gamma correction). Prior to 1.5.5 this code + * checked the linearized values for equality; this doesn't match + * the documentation, the original values must be checked. + */ + if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL) + { + png_bytep sp = row; + png_bytep dp = row; + png_uint_32 i; - for (i = 0; i < row_width; i++) - { - png_byte red = png_ptr->gamma_to_1[*(sp++)]; - png_byte green = png_ptr->gamma_to_1[*(sp++)]; - png_byte blue = png_ptr->gamma_to_1[*(sp++)]; - if (red != green || red != blue) - { - rgb_error |= 1; - *(dp++) = png_ptr->gamma_from_1[ - (rc*red + gc*green + bc*blue)>>15]; - } - else - *(dp++) = *(sp - 1); - } - } - else -#endif + for (i = 0; i < row_width; i++) { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_byte red = *(sp++); - png_byte green = *(sp++); - png_byte blue = *(sp++); - if (red != green || red != blue) - { - rgb_error |= 1; - *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15); - } - else - *(dp++) = *(sp - 1); - } - } - } + png_byte red = *(sp++); + png_byte green = *(sp++); + png_byte blue = *(sp++); - else /* RGB bit_depth == 16 */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_16_to_1 != NULL && - png_ptr->gamma_16_from_1 != NULL) - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) + if (red != green || red != blue) { - png_uint_16 red, green, blue, w; + red = png_ptr->gamma_to_1[red]; + green = png_ptr->gamma_to_1[green]; + blue = png_ptr->gamma_to_1[blue]; - red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; + rgb_error |= 1; + *(dp++) = png_ptr->gamma_from_1[ + (rc*red + gc*green + bc*blue + 16384)>>15]; + } - if (red == green && red == blue) - w = red; - else - { - png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >> - png_ptr->gamma_shift][red>>8]; - png_uint_16 green_1 = - png_ptr->gamma_16_to_1[(green&0xff) >> - png_ptr->gamma_shift][green>>8]; - png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >> - png_ptr->gamma_shift][blue>>8]; - png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1 - + bc*blue_1)>>15); - w = png_ptr->gamma_16_from_1[(gray16&0xff) >> - png_ptr->gamma_shift][gray16 >> 8]; - rgb_error |= 1; - } + else + { + /* If there is no overall correction the table will not be + * set. + */ + if (png_ptr->gamma_table != NULL) + red = png_ptr->gamma_table[red]; - *(dp++) = (png_byte)((w>>8) & 0xff); - *(dp++) = (png_byte)(w & 0xff); + *(dp++) = red; } + + if (have_alpha) + *(dp++) = *(sp++); } - else + } + else #endif + { + png_bytep sp = row; + png_bytep dp = row; + png_uint_32 i; + + for (i = 0; i < row_width; i++) { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) + png_byte red = *(sp++); + png_byte green = *(sp++); + png_byte blue = *(sp++); + + if (red != green || red != blue) { - png_uint_16 red, green, blue, gray16; + rgb_error |= 1; + /*NOTE: this is the historical approach which simply + * truncates the results. + */ + *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15); + } - red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; + else + *(dp++) = red; - if (red != green || red != blue) - rgb_error |= 1; - gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15); - *(dp++) = (png_byte)((gray16>>8) & 0xff); - *(dp++) = (png_byte)(gray16 & 0xff); - } + if (have_alpha) + *(dp++) = *(sp++); } } } - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + + else /* RGB bit_depth == 16 */ { - if (row_info->bit_depth == 8) - { #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL) + if (png_ptr->gamma_16_to_1 != NULL && png_ptr->gamma_16_from_1 != NULL) + { + png_bytep sp = row; + png_bytep dp = row; + png_uint_32 i; + + for (i = 0; i < row_width; i++) { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) + png_uint_16 red, green, blue, w; + + red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + + if (red == green && red == blue) { - png_byte red = png_ptr->gamma_to_1[*(sp++)]; - png_byte green = png_ptr->gamma_to_1[*(sp++)]; - png_byte blue = png_ptr->gamma_to_1[*(sp++)]; - if (red != green || red != blue) - rgb_error |= 1; - *(dp++) = png_ptr->gamma_from_1 - [(rc*red + gc*green + bc*blue)>>15]; - *(dp++) = *(sp++); /* alpha */ + if (png_ptr->gamma_16_table != NULL) + w = png_ptr->gamma_16_table[(red&0xff) + >> png_ptr->gamma_shift][red>>8]; + + else + w = red; } - } - else -#endif - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) + + else { - png_byte red = *(sp++); - png_byte green = *(sp++); - png_byte blue = *(sp++); - if (red != green || red != blue) - rgb_error |= 1; - *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15); - *(dp++) = *(sp++); /* alpha */ + png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) + >> png_ptr->gamma_shift][red>>8]; + png_uint_16 green_1 = + png_ptr->gamma_16_to_1[(green&0xff) >> + png_ptr->gamma_shift][green>>8]; + png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) + >> png_ptr->gamma_shift][blue>>8]; + png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1 + + bc*blue_1 + 16384)>>15); + w = png_ptr->gamma_16_from_1[(gray16&0xff) >> + png_ptr->gamma_shift][gray16 >> 8]; + rgb_error |= 1; } - } - } - else /* RGBA bit_depth == 16 */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_16_to_1 != NULL && - png_ptr->gamma_16_from_1 != NULL) - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 red, green, blue, w; - red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - - if (red == green && red == blue) - w = red; - else - { - png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >> - png_ptr->gamma_shift][red>>8]; - png_uint_16 green_1 = - png_ptr->gamma_16_to_1[(green&0xff) >> - png_ptr->gamma_shift][green>>8]; - png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >> - png_ptr->gamma_shift][blue>>8]; - png_uint_16 gray16 = (png_uint_16)((rc * red_1 - + gc * green_1 + bc * blue_1)>>15); - w = png_ptr->gamma_16_from_1[(gray16&0xff) >> - png_ptr->gamma_shift][gray16 >> 8]; - rgb_error |= 1; - } + *(dp++) = (png_byte)((w>>8) & 0xff); + *(dp++) = (png_byte)(w & 0xff); - *(dp++) = (png_byte)((w>>8) & 0xff); - *(dp++) = (png_byte)(w & 0xff); - *(dp++) = *(sp++); /* alpha */ + if (have_alpha) + { + *(dp++) = *(sp++); *(dp++) = *(sp++); } } - else + } + else #endif + { + png_bytep sp = row; + png_bytep dp = row; + png_uint_32 i; + + for (i = 0; i < row_width; i++) { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) + png_uint_16 red, green, blue, gray16; + + red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + + if (red != green || red != blue) + rgb_error |= 1; + + /* From 1.5.5 in the 16 bit case do the accurate convertion even + * in the 'fast' case - this is because this is where the code + * ends up when handling linear 16 bit data. + */ + gray16 = (png_uint_16)((rc*red + gc*green + bc*blue + 16384) >> + 15); + *(dp++) = (png_byte)((gray16>>8) & 0xff); + *(dp++) = (png_byte)(gray16 & 0xff); + + if (have_alpha) { - png_uint_16 red, green, blue, gray16; - red = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2; - green = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2; - blue = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2; - if (red != green || red != blue) - rgb_error |= 1; - gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15); - *(dp++) = (png_byte)((gray16>>8) & 0xff); - *(dp++) = (png_byte)(gray16 & 0xff); - *(dp++) = *(sp++); /* alpha */ + *(dp++) = *(sp++); *(dp++) = *(sp++); } } } } - row_info->channels -= (png_byte)2; - row_info->color_type &= ~PNG_COLOR_MASK_COLOR; + + row_info->channels = (png_byte)(row_info->channels - 2); + row_info->color_type = (png_byte)(row_info->color_type & + ~PNG_COLOR_MASK_COLOR); row_info->pixel_depth = (png_byte)(row_info->channels * - row_info->bit_depth); + row_info->bit_depth); row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); } return rgb_error; } #endif +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ +#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED /* Build a grayscale palette. Palette is assumed to be 1 << bit_depth * large of png_color. This lets grayscale images be treated as * paletted. Most useful for gamma correction and simplification - * of code. + * of code. This API is not used internally. */ void PNGAPI png_build_grayscale_palette(int bit_depth, png_colorp palette) @@ -2550,34 +3415,37 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette) palette[i].blue = (png_byte)v; } } +#endif -#ifdef PNG_READ_BACKGROUND_SUPPORTED +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ + (defined PNG_READ_ALPHA_MODE_SUPPORTED) /* Replace any alpha or transparency with the supplied background color. * "background" is already in the screen gamma, while "background_1" is * at a gamma of 1.0. Paletted files have already been taken care of. */ void /* PRIVATE */ -png_do_background(png_row_infop row_info, png_bytep row, - png_color_16p trans_color, png_color_16p background +png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) +{ #ifdef PNG_READ_GAMMA_SUPPORTED - , png_color_16p background_1, - png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, - png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, - png_uint_16pp gamma_16_to_1, int gamma_shift + png_const_bytep gamma_table = png_ptr->gamma_table; + png_const_bytep gamma_from_1 = png_ptr->gamma_from_1; + png_const_bytep gamma_to_1 = png_ptr->gamma_to_1; + png_const_uint_16pp gamma_16 = png_ptr->gamma_16_table; + png_const_uint_16pp gamma_16_from_1 = png_ptr->gamma_16_from_1; + png_const_uint_16pp gamma_16_to_1 = png_ptr->gamma_16_to_1; + int gamma_shift = png_ptr->gamma_shift; #endif - ) -{ - png_bytep sp, dp; + + png_bytep sp; png_uint_32 i; - png_uint_32 row_width=row_info->width; + png_uint_32 row_width = row_info->width; + int optimize = (png_ptr->flags & PNG_FLAG_OPTIMIZE_ALPHA) != 0; int shift; - png_debug(1, "in png_do_background"); + png_debug(1, "in png_do_compose"); - if (background != NULL && - (!(row_info->color_type & PNG_COLOR_MASK_ALPHA) || - (row_info->color_type != PNG_COLOR_TYPE_PALETTE && trans_color))) { switch (row_info->color_type) { @@ -2592,16 +3460,18 @@ png_do_background(png_row_infop row_info, png_bytep row, for (i = 0; i < row_width; i++) { if ((png_uint_16)((*sp >> shift) & 0x01) - == trans_color->gray) + == png_ptr->trans_color.gray) { *sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); + *sp |= (png_byte)(png_ptr->background.gray << shift); } + if (!shift) { shift = 7; sp++; } + else shift--; } @@ -2618,11 +3488,12 @@ png_do_background(png_row_infop row_info, png_bytep row, for (i = 0; i < row_width; i++) { if ((png_uint_16)((*sp >> shift) & 0x03) - == trans_color->gray) + == png_ptr->trans_color.gray) { *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); + *sp |= (png_byte)(png_ptr->background.gray << shift); } + else { png_byte p = (png_byte)((*sp >> shift) & 0x03); @@ -2631,15 +3502,18 @@ png_do_background(png_row_infop row_info, png_bytep row, *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); *sp |= (png_byte)(g << shift); } + if (!shift) { shift = 6; sp++; } + else shift -= 2; } } + else #endif { @@ -2648,16 +3522,18 @@ png_do_background(png_row_infop row_info, png_bytep row, for (i = 0; i < row_width; i++) { if ((png_uint_16)((*sp >> shift) & 0x03) - == trans_color->gray) + == png_ptr->trans_color.gray) { *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); + *sp |= (png_byte)(png_ptr->background.gray << shift); } + if (!shift) { shift = 6; sp++; } + else shift -= 2; } @@ -2675,28 +3551,32 @@ png_do_background(png_row_infop row_info, png_bytep row, for (i = 0; i < row_width; i++) { if ((png_uint_16)((*sp >> shift) & 0x0f) - == trans_color->gray) + == png_ptr->trans_color.gray) { *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); + *sp |= (png_byte)(png_ptr->background.gray << shift); } + else { png_byte p = (png_byte)((*sp >> shift) & 0x0f); png_byte g = (png_byte)((gamma_table[p | - (p << 4)] >> 4) & 0x0f); + (p << 4)] >> 4) & 0x0f); *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); *sp |= (png_byte)(g << shift); } + if (!shift) { shift = 4; sp++; } + else shift -= 4; } } + else #endif { @@ -2705,16 +3585,18 @@ png_do_background(png_row_infop row_info, png_bytep row, for (i = 0; i < row_width; i++) { if ((png_uint_16)((*sp >> shift) & 0x0f) - == trans_color->gray) + == png_ptr->trans_color.gray) { *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); + *sp |= (png_byte)(png_ptr->background.gray << shift); } + if (!shift) { shift = 4; sp++; } + else shift -= 4; } @@ -2730,14 +3612,11 @@ png_do_background(png_row_infop row_info, png_bytep row, sp = row; for (i = 0; i < row_width; i++, sp++) { - if (*sp == trans_color->gray) - { - *sp = (png_byte)background->gray; - } + if (*sp == png_ptr->trans_color.gray) + *sp = (png_byte)png_ptr->background.gray; + else - { *sp = gamma_table[*sp]; - } } } else @@ -2746,10 +3625,8 @@ png_do_background(png_row_infop row_info, png_bytep row, sp = row; for (i = 0; i < row_width; i++, sp++) { - if (*sp == trans_color->gray) - { - *sp = (png_byte)background->gray; - } + if (*sp == png_ptr->trans_color.gray) + *sp = (png_byte)png_ptr->background.gray; } } break; @@ -2766,12 +3643,14 @@ png_do_background(png_row_infop row_info, png_bytep row, png_uint_16 v; v = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - if (v == trans_color->gray) + + if (v == png_ptr->trans_color.gray) { /* Background is already in screen gamma */ - *sp = (png_byte)((background->gray >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->gray & 0xff); + *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); } + else { v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; @@ -2789,15 +3668,19 @@ png_do_background(png_row_infop row_info, png_bytep row, png_uint_16 v; v = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - if (v == trans_color->gray) + + if (v == png_ptr->trans_color.gray) { - *sp = (png_byte)((background->gray >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->gray & 0xff); + *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); } } } break; } + + default: + break; } break; } @@ -2812,14 +3695,15 @@ png_do_background(png_row_infop row_info, png_bytep row, sp = row; for (i = 0; i < row_width; i++, sp += 3) { - if (*sp == trans_color->red && - *(sp + 1) == trans_color->green && - *(sp + 2) == trans_color->blue) + if (*sp == png_ptr->trans_color.red && + *(sp + 1) == png_ptr->trans_color.green && + *(sp + 2) == png_ptr->trans_color.blue) { - *sp = (png_byte)background->red; - *(sp + 1) = (png_byte)background->green; - *(sp + 2) = (png_byte)background->blue; + *sp = (png_byte)png_ptr->background.red; + *(sp + 1) = (png_byte)png_ptr->background.green; + *(sp + 2) = (png_byte)png_ptr->background.blue; } + else { *sp = gamma_table[*sp]; @@ -2834,13 +3718,13 @@ png_do_background(png_row_infop row_info, png_bytep row, sp = row; for (i = 0; i < row_width; i++, sp += 3) { - if (*sp == trans_color->red && - *(sp + 1) == trans_color->green && - *(sp + 2) == trans_color->blue) + if (*sp == png_ptr->trans_color.red && + *(sp + 1) == png_ptr->trans_color.green && + *(sp + 2) == png_ptr->trans_color.blue) { - *sp = (png_byte)background->red; - *(sp + 1) = (png_byte)background->green; - *(sp + 2) = (png_byte)background->blue; + *sp = (png_byte)png_ptr->background.red; + *(sp + 1) = (png_byte)png_ptr->background.green; + *(sp + 2) = (png_byte)png_ptr->background.blue; } } } @@ -2854,52 +3738,67 @@ png_do_background(png_row_infop row_info, png_bytep row, for (i = 0; i < row_width; i++, sp += 6) { png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - png_uint_16 g = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3)); - png_uint_16 b = (png_uint_16)(((*(sp+4)) << 8) + *(sp+5)); - if (r == trans_color->red && g == trans_color->green && - b == trans_color->blue) + + png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); + + png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8) + + *(sp + 5)); + + if (r == png_ptr->trans_color.red && + g == png_ptr->trans_color.green && + b == png_ptr->trans_color.blue) { /* Background is already in screen gamma */ - *sp = (png_byte)((background->red >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->red & 0xff); - *(sp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(sp + 3) = (png_byte)(background->green & 0xff); - *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(sp + 5) = (png_byte)(background->blue & 0xff); + *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); + *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); + *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); + *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); + *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); } + else { png_uint_16 v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; *sp = (png_byte)((v >> 8) & 0xff); *(sp + 1) = (png_byte)(v & 0xff); + v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)]; *(sp + 2) = (png_byte)((v >> 8) & 0xff); *(sp + 3) = (png_byte)(v & 0xff); + v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)]; *(sp + 4) = (png_byte)((v >> 8) & 0xff); *(sp + 5) = (png_byte)(v & 0xff); } } } + else #endif { sp = row; for (i = 0; i < row_width; i++, sp += 6) { - png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp+1)); - png_uint_16 g = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3)); - png_uint_16 b = (png_uint_16)(((*(sp+4)) << 8) + *(sp+5)); + png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1)); + + png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); - if (r == trans_color->red && g == trans_color->green && - b == trans_color->blue) + png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8) + + *(sp + 5)); + + if (r == png_ptr->trans_color.red && + g == png_ptr->trans_color.green && + b == png_ptr->trans_color.blue) { - *sp = (png_byte)((background->red >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->red & 0xff); - *(sp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(sp + 3) = (png_byte)(background->green & 0xff); - *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(sp + 5) = (png_byte)(background->blue & 0xff); + *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); + *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); + *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); + *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); + *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); } } } @@ -2916,27 +3815,28 @@ png_do_background(png_row_infop row_info, png_bytep row, gamma_table != NULL) { sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 2, dp++) + for (i = 0; i < row_width; i++, sp += 2) { png_uint_16 a = *(sp + 1); if (a == 0xff) - { - *dp = gamma_table[*sp]; - } + *sp = gamma_table[*sp]; + else if (a == 0) { /* Background is already in screen gamma */ - *dp = (png_byte)background->gray; + *sp = (png_byte)png_ptr->background.gray; } + else { png_byte v, w; v = gamma_to_1[*sp]; - png_composite(w, v, a, background_1->gray); - *dp = gamma_from_1[w]; + png_composite(w, v, a, png_ptr->background_1.gray); + if (!optimize) + w = gamma_from_1[w]; + *sp = w; } } } @@ -2944,27 +3844,15 @@ png_do_background(png_row_infop row_info, png_bytep row, #endif { sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 2, dp++) + for (i = 0; i < row_width; i++, sp += 2) { - png_byte a = *(sp + 1); - - if (a == 0xff) - { - *dp = *sp; - } -#ifdef PNG_READ_GAMMA_SUPPORTED - else if (a == 0) - { - *dp = (png_byte)background->gray; - } - else - { - png_composite(*dp, *sp, a, background_1->gray); - } -#else - *dp = (png_byte)background->gray; -#endif + png_byte a = *(sp + 1); + + if (a == 0) + *sp = (png_byte)png_ptr->background.gray; + + else if (a < 0xff) + png_composite(*sp, *sp, a, png_ptr->background_1.gray); } } } @@ -2975,75 +3863,66 @@ png_do_background(png_row_infop row_info, png_bytep row, gamma_16_to_1 != NULL) { sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 2) + for (i = 0; i < row_width; i++, sp += 4) { - png_uint_16 a = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3)); + png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); if (a == (png_uint_16)0xffff) { png_uint_16 v; v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); } -#ifdef PNG_READ_GAMMA_SUPPORTED + else if (a == 0) -#else - else -#endif { /* Background is already in screen gamma */ - *dp = (png_byte)((background->gray >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->gray & 0xff); + *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); } -#ifdef PNG_READ_GAMMA_SUPPORTED + else { png_uint_16 g, v, w; g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; - png_composite_16(v, g, a, background_1->gray); - w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8]; - *dp = (png_byte)((w >> 8) & 0xff); - *(dp + 1) = (png_byte)(w & 0xff); + png_composite_16(v, g, a, png_ptr->background_1.gray); + if (optimize) + w = v; + else + w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8]; + *sp = (png_byte)((w >> 8) & 0xff); + *(sp + 1) = (png_byte)(w & 0xff); } -#endif } } else #endif { sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 2) + for (i = 0; i < row_width; i++, sp += 4) { - png_uint_16 a = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3)); - if (a == (png_uint_16)0xffff) - { - png_memcpy(dp, sp, 2); - } -#ifdef PNG_READ_GAMMA_SUPPORTED - else if (a == 0) -#else - else -#endif + png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); + + if (a == 0) { - *dp = (png_byte)((background->gray >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->gray & 0xff); + *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); } -#ifdef PNG_READ_GAMMA_SUPPORTED - else + + else if (a < 0xffff) { png_uint_16 g, v; g = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - png_composite_16(v, g, a, background_1->gray); - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); + png_composite_16(v, g, a, png_ptr->background_1.gray); + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); } -#endif } } } @@ -3059,37 +3938,43 @@ png_do_background(png_row_infop row_info, png_bytep row, gamma_table != NULL) { sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 3) + for (i = 0; i < row_width; i++, sp += 4) { png_byte a = *(sp + 3); if (a == 0xff) { - *dp = gamma_table[*sp]; - *(dp + 1) = gamma_table[*(sp + 1)]; - *(dp + 2) = gamma_table[*(sp + 2)]; + *sp = gamma_table[*sp]; + *(sp + 1) = gamma_table[*(sp + 1)]; + *(sp + 2) = gamma_table[*(sp + 2)]; } + else if (a == 0) { /* Background is already in screen gamma */ - *dp = (png_byte)background->red; - *(dp + 1) = (png_byte)background->green; - *(dp + 2) = (png_byte)background->blue; + *sp = (png_byte)png_ptr->background.red; + *(sp + 1) = (png_byte)png_ptr->background.green; + *(sp + 2) = (png_byte)png_ptr->background.blue; } + else { png_byte v, w; v = gamma_to_1[*sp]; - png_composite(w, v, a, background_1->red); - *dp = gamma_from_1[w]; + png_composite(w, v, a, png_ptr->background_1.red); + if (!optimize) w = gamma_from_1[w]; + *sp = w; + v = gamma_to_1[*(sp + 1)]; - png_composite(w, v, a, background_1->green); - *(dp + 1) = gamma_from_1[w]; + png_composite(w, v, a, png_ptr->background_1.green); + if (!optimize) w = gamma_from_1[w]; + *(sp + 1) = w; + v = gamma_to_1[*(sp + 2)]; - png_composite(w, v, a, background_1->blue); - *(dp + 2) = gamma_from_1[w]; + png_composite(w, v, a, png_ptr->background_1.blue); + if (!optimize) w = gamma_from_1[w]; + *(sp + 2) = w; } } } @@ -3097,30 +3982,26 @@ png_do_background(png_row_infop row_info, png_bytep row, #endif { sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 3) + for (i = 0; i < row_width; i++, sp += 4) { png_byte a = *(sp + 3); - if (a == 0xff) - { - *dp = *sp; - *(dp + 1) = *(sp + 1); - *(dp + 2) = *(sp + 2); - } - else if (a == 0) + if (a == 0) { - *dp = (png_byte)background->red; - *(dp + 1) = (png_byte)background->green; - *(dp + 2) = (png_byte)background->blue; + *sp = (png_byte)png_ptr->background.red; + *(sp + 1) = (png_byte)png_ptr->background.green; + *(sp + 2) = (png_byte)png_ptr->background.blue; } - else + + else if (a < 0xff) { - png_composite(*dp, *sp, a, background->red); - png_composite(*(dp + 1), *(sp + 1), a, - background->green); - png_composite(*(dp + 2), *(sp + 2), a, - background->blue); + png_composite(*sp, *sp, a, png_ptr->background.red); + + png_composite(*(sp + 1), *(sp + 1), a, + png_ptr->background.green); + + png_composite(*(sp + 2), *(sp + 2), a, + png_ptr->background.blue); } } } @@ -3132,80 +4013,89 @@ png_do_background(png_row_infop row_info, png_bytep row, gamma_16_to_1 != NULL) { sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 8, dp += 6) + for (i = 0; i < row_width; i++, sp += 8) { png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6)) << 8) + (png_uint_16)(*(sp + 7))); + if (a == (png_uint_16)0xffff) { png_uint_16 v; v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)]; - *(dp + 2) = (png_byte)((v >> 8) & 0xff); - *(dp + 3) = (png_byte)(v & 0xff); + *(sp + 2) = (png_byte)((v >> 8) & 0xff); + *(sp + 3) = (png_byte)(v & 0xff); + v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)]; - *(dp + 4) = (png_byte)((v >> 8) & 0xff); - *(dp + 5) = (png_byte)(v & 0xff); + *(sp + 4) = (png_byte)((v >> 8) & 0xff); + *(sp + 5) = (png_byte)(v & 0xff); } + else if (a == 0) { /* Background is already in screen gamma */ - *dp = (png_byte)((background->red >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->red & 0xff); - *(dp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(dp + 3) = (png_byte)(background->green & 0xff); - *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(dp + 5) = (png_byte)(background->blue & 0xff); + *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); + *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); + *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); + *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); + *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); } + else { - png_uint_16 v, w, x; + png_uint_16 v, w; v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; - png_composite_16(w, v, a, background_1->red); - x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; - *dp = (png_byte)((x >> 8) & 0xff); - *(dp + 1) = (png_byte)(x & 0xff); + png_composite_16(w, v, a, png_ptr->background_1.red); + if (!optimize) + w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; + *sp = (png_byte)((w >> 8) & 0xff); + *(sp + 1) = (png_byte)(w & 0xff); + v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)]; - png_composite_16(w, v, a, background_1->green); - x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; - *(dp + 2) = (png_byte)((x >> 8) & 0xff); - *(dp + 3) = (png_byte)(x & 0xff); + png_composite_16(w, v, a, png_ptr->background_1.green); + if (!optimize) + w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; + + *(sp + 2) = (png_byte)((w >> 8) & 0xff); + *(sp + 3) = (png_byte)(w & 0xff); + v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)]; - png_composite_16(w, v, a, background_1->blue); - x = gamma_16_from_1[(w & 0xff) >> gamma_shift][w >> 8]; - *(dp + 4) = (png_byte)((x >> 8) & 0xff); - *(dp + 5) = (png_byte)(x & 0xff); + png_composite_16(w, v, a, png_ptr->background_1.blue); + if (!optimize) + w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; + + *(sp + 4) = (png_byte)((w >> 8) & 0xff); + *(sp + 5) = (png_byte)(w & 0xff); } } } + else #endif { sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 8, dp += 6) + for (i = 0; i < row_width; i++, sp += 8) { png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6)) - << 8) + (png_uint_16)(*(sp + 7))); - if (a == (png_uint_16)0xffff) - { - png_memcpy(dp, sp, 6); - } - else if (a == 0) + << 8) + (png_uint_16)(*(sp + 7))); + + if (a == 0) { - *dp = (png_byte)((background->red >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->red & 0xff); - *(dp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(dp + 3) = (png_byte)(background->green & 0xff); - *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(dp + 5) = (png_byte)(background->blue & 0xff); + *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); + *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); + *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); + *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); + *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); } - else + + else if (a < 0xffff) { png_uint_16 v; @@ -3215,34 +4105,30 @@ png_do_background(png_row_infop row_info, png_bytep row, png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8) + *(sp + 5)); - png_composite_16(v, r, a, background->red); - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - png_composite_16(v, g, a, background->green); - *(dp + 2) = (png_byte)((v >> 8) & 0xff); - *(dp + 3) = (png_byte)(v & 0xff); - png_composite_16(v, b, a, background->blue); - *(dp + 4) = (png_byte)((v >> 8) & 0xff); - *(dp + 5) = (png_byte)(v & 0xff); + png_composite_16(v, r, a, png_ptr->background.red); + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + + png_composite_16(v, g, a, png_ptr->background.green); + *(sp + 2) = (png_byte)((v >> 8) & 0xff); + *(sp + 3) = (png_byte)(v & 0xff); + + png_composite_16(v, b, a, png_ptr->background.blue); + *(sp + 4) = (png_byte)((v >> 8) & 0xff); + *(sp + 5) = (png_byte)(v & 0xff); } } } } break; } - } - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) - { - row_info->color_type &= ~PNG_COLOR_MASK_ALPHA; - row_info->channels--; - row_info->pixel_depth = (png_byte)(row_info->channels * - row_info->bit_depth); - row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); + default: + break; } } } -#endif +#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_READ_ALPHA_MODE_SUPPORTED */ #ifdef PNG_READ_GAMMA_SUPPORTED /* Gamma correct the image, avoiding the alpha channel. Make sure @@ -3252,19 +4138,20 @@ png_do_background(png_row_infop row_info, png_bytep row, * build_gamma_table(). */ void /* PRIVATE */ -png_do_gamma(png_row_infop row_info, png_bytep row, - png_bytep gamma_table, png_uint_16pp gamma_16_table, - int gamma_shift) +png_do_gamma(png_row_infop row_info, png_bytep row, png_structp png_ptr) { + png_const_bytep gamma_table = png_ptr->gamma_table; + png_const_uint_16pp gamma_16_table = png_ptr->gamma_16_table; + int gamma_shift = png_ptr->gamma_shift; + png_bytep sp; png_uint_32 i; png_uint_32 row_width=row_info->width; png_debug(1, "in png_do_gamma"); - if ( - ((row_info->bit_depth <= 8 && gamma_table != NULL) || - (row_info->bit_depth == 16 && gamma_16_table != NULL))) + if (((row_info->bit_depth <= 8 && gamma_table != NULL) || + (row_info->bit_depth == 16 && gamma_16_table != NULL))) { switch (row_info->color_type) { @@ -3283,6 +4170,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row, sp++; } } + else /* if (row_info->bit_depth == 16) */ { sp = row; @@ -3294,10 +4182,12 @@ png_do_gamma(png_row_infop row_info, png_bytep row, *sp = (png_byte)((v >> 8) & 0xff); *(sp + 1) = (png_byte)(v & 0xff); sp += 2; + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; *sp = (png_byte)((v >> 8) & 0xff); *(sp + 1) = (png_byte)(v & 0xff); sp += 2; + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; *sp = (png_byte)((v >> 8) & 0xff); *(sp + 1) = (png_byte)(v & 0xff); @@ -3316,13 +4206,17 @@ png_do_gamma(png_row_infop row_info, png_bytep row, { *sp = gamma_table[*sp]; sp++; + *sp = gamma_table[*sp]; sp++; + *sp = gamma_table[*sp]; sp++; + sp++; } } + else /* if (row_info->bit_depth == 16) */ { sp = row; @@ -3332,10 +4226,12 @@ png_do_gamma(png_row_infop row_info, png_bytep row, *sp = (png_byte)((v >> 8) & 0xff); *(sp + 1) = (png_byte)(v & 0xff); sp += 2; + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; *sp = (png_byte)((v >> 8) & 0xff); *(sp + 1) = (png_byte)(v & 0xff); sp += 2; + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; *sp = (png_byte)((v >> 8) & 0xff); *(sp + 1) = (png_byte)(v & 0xff); @@ -3356,6 +4252,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row, sp += 2; } } + else /* if (row_info->bit_depth == 16) */ { sp = row; @@ -3428,8 +4325,78 @@ png_do_gamma(png_row_infop row_info, png_bytep row, } break; } + + default: + break; + } + } +} +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED +/* Encode the alpha channel to the output gamma (the input channel is always + * linear.) Called only with color types that have an alpha channel. Needs the + * from_1 tables. + */ +void /* PRIVATE */ +png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structp png_ptr) +{ + png_uint_32 row_width = row_info->width; + + png_debug(1, "in png_do_encode_alpha"); + + if (row_info->color_type & PNG_COLOR_MASK_ALPHA) + { + if (row_info->bit_depth == 8) + { + PNG_CONST png_bytep table = png_ptr->gamma_from_1; + + if (table != NULL) + { + PNG_CONST int step = + (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 4 : 2; + + /* The alpha channel is the last component: */ + row += step - 1; + + for (; row_width > 0; --row_width, row += step) + *row = table[*row]; + + return; + } + } + + else if (row_info->bit_depth == 16) + { + PNG_CONST png_uint_16pp table = png_ptr->gamma_16_from_1; + PNG_CONST int gamma_shift = png_ptr->gamma_shift; + + if (table != NULL) + { + PNG_CONST int step = + (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 8 : 4; + + /* The alpha channel is the last component: */ + row += step - 2; + + for (; row_width > 0; --row_width, row += step) + { + png_uint_16 v; + + v = table[*(row + 1) >> gamma_shift][*row]; + *row = (png_byte)((v >> 8) & 0xff); + *(row + 1) = (png_byte)(v & 0xff); + } + + return; + } } } + + /* Only get to here if called with a weird row_info; no harm has been done, + * so just issue a warning. + */ + png_warning(png_ptr, "png_do_encode_alpha: unexpected call"); } #endif @@ -3439,7 +4406,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row, */ void /* PRIVATE */ png_do_expand_palette(png_row_infop row_info, png_bytep row, - png_colorp palette, png_bytep trans_alpha, int num_trans) + png_const_colorp palette, png_const_bytep trans_alpha, int num_trans) { int shift, value; png_bytep sp, dp; @@ -3448,8 +4415,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, png_debug(1, "in png_do_expand_palette"); - if ( - row_info->color_type == PNG_COLOR_TYPE_PALETTE) + if (row_info->color_type == PNG_COLOR_TYPE_PALETTE) { if (row_info->bit_depth < 8) { @@ -3464,13 +4430,16 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, { if ((*sp >> shift) & 0x01) *dp = 1; + else *dp = 0; + if (shift == 7) { shift = 0; sp--; } + else shift++; @@ -3493,6 +4462,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, shift = 0; sp--; } + else shift += 2; @@ -3515,6 +4485,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, shift = 0; sp--; } + else shift += 4; @@ -3522,16 +4493,19 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, } break; } + + default: + break; } row_info->bit_depth = 8; row_info->pixel_depth = 8; row_info->rowbytes = row_width; } - switch (row_info->bit_depth) + + if (row_info->bit_depth == 8) { - case 8: { - if (trans_alpha != NULL) + if (num_trans > 0) { sp = row + (png_size_t)row_width - 1; dp = row + (png_size_t)(row_width << 2) - 1; @@ -3540,8 +4514,10 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, { if ((int)(*sp) >= num_trans) *dp-- = 0xff; + else *dp-- = trans_alpha[*sp]; + *dp-- = palette[*sp].blue; *dp-- = palette[*sp].green; *dp-- = palette[*sp].red; @@ -3553,6 +4529,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, row_info->color_type = 6; row_info->channels = 4; } + else { sp = row + (png_size_t)row_width - 1; @@ -3572,7 +4549,6 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, row_info->color_type = 2; row_info->channels = 3; } - break; } } } @@ -3583,7 +4559,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, */ void /* PRIVATE */ png_do_expand(png_row_infop row_info, png_bytep row, - png_color_16p trans_value) + png_const_color_16p trans_color) { int shift, value; png_bytep sp, dp; @@ -3595,7 +4571,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, { if (row_info->color_type == PNG_COLOR_TYPE_GRAY) { - png_uint_16 gray = (png_uint_16)(trans_value ? trans_value->gray : 0); + png_uint_16 gray = (png_uint_16)(trans_color ? trans_color->gray : 0); if (row_info->bit_depth < 8) { @@ -3603,7 +4579,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, { case 1: { - gray = (png_uint_16)((gray&0x01)*0xff); + gray = (png_uint_16)((gray & 0x01) * 0xff); sp = row + (png_size_t)((row_width - 1) >> 3); dp = row + (png_size_t)row_width - 1; shift = 7 - (int)((row_width + 7) & 0x07); @@ -3611,13 +4587,16 @@ png_do_expand(png_row_infop row_info, png_bytep row, { if ((*sp >> shift) & 0x01) *dp = 0xff; + else *dp = 0; + if (shift == 7) { shift = 0; sp--; } + else shift++; @@ -3628,7 +4607,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, case 2: { - gray = (png_uint_16)((gray&0x03)*0x55); + gray = (png_uint_16)((gray & 0x03) * 0x55); sp = row + (png_size_t)((row_width - 1) >> 2); dp = row + (png_size_t)row_width - 1; shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); @@ -3642,6 +4621,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, shift = 0; sp--; } + else shift += 2; @@ -3652,7 +4632,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, case 4: { - gray = (png_uint_16)((gray&0x0f)*0x11); + gray = (png_uint_16)((gray & 0x0f) * 0x11); sp = row + (png_size_t)((row_width - 1) >> 1); dp = row + (png_size_t)row_width - 1; shift = (int)((1 - ((row_width + 1) & 0x01)) << 2); @@ -3665,6 +4645,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, shift = 0; sp--; } + else shift = 4; @@ -3672,6 +4653,9 @@ png_do_expand(png_row_infop row_info, png_bytep row, } break; } + + default: + break; } row_info->bit_depth = 8; @@ -3679,27 +4663,30 @@ png_do_expand(png_row_infop row_info, png_bytep row, row_info->rowbytes = row_width; } - if (trans_value != NULL) + if (trans_color != NULL) { if (row_info->bit_depth == 8) { gray = gray & 0xff; sp = row + (png_size_t)row_width - 1; dp = row + (png_size_t)(row_width << 1) - 1; + for (i = 0; i < row_width; i++) { if (*sp == gray) *dp-- = 0; + else *dp-- = 0xff; + *dp-- = *sp--; } } else if (row_info->bit_depth == 16) { - png_byte gray_high = (gray >> 8) & 0xff; - png_byte gray_low = gray & 0xff; + png_byte gray_high = (png_byte)((gray >> 8) & 0xff); + png_byte gray_low = (png_byte)(gray & 0xff); sp = row + row_info->rowbytes - 1; dp = row + (row_info->rowbytes << 1) - 1; for (i = 0; i < row_width; i++) @@ -3709,11 +4696,13 @@ png_do_expand(png_row_infop row_info, png_bytep row, *dp-- = 0; *dp-- = 0; } + else { *dp-- = 0xff; *dp-- = 0xff; } + *dp-- = *sp--; *dp-- = *sp--; } @@ -3726,21 +4715,23 @@ png_do_expand(png_row_infop row_info, png_bytep row, row_width); } } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB && trans_value) + else if (row_info->color_type == PNG_COLOR_TYPE_RGB && trans_color) { if (row_info->bit_depth == 8) { - png_byte red = trans_value->red & 0xff; - png_byte green = trans_value->green & 0xff; - png_byte blue = trans_value->blue & 0xff; + png_byte red = (png_byte)(trans_color->red & 0xff); + png_byte green = (png_byte)(trans_color->green & 0xff); + png_byte blue = (png_byte)(trans_color->blue & 0xff); sp = row + (png_size_t)row_info->rowbytes - 1; dp = row + (png_size_t)(row_width << 2) - 1; for (i = 0; i < row_width; i++) { if (*(sp - 2) == red && *(sp - 1) == green && *(sp) == blue) *dp-- = 0; + else *dp-- = 0xff; + *dp-- = *sp--; *dp-- = *sp--; *dp-- = *sp--; @@ -3748,31 +4739,33 @@ png_do_expand(png_row_infop row_info, png_bytep row, } else if (row_info->bit_depth == 16) { - png_byte red_high = (trans_value->red >> 8) & 0xff; - png_byte green_high = (trans_value->green >> 8) & 0xff; - png_byte blue_high = (trans_value->blue >> 8) & 0xff; - png_byte red_low = trans_value->red & 0xff; - png_byte green_low = trans_value->green & 0xff; - png_byte blue_low = trans_value->blue & 0xff; + png_byte red_high = (png_byte)((trans_color->red >> 8) & 0xff); + png_byte green_high = (png_byte)((trans_color->green >> 8) & 0xff); + png_byte blue_high = (png_byte)((trans_color->blue >> 8) & 0xff); + png_byte red_low = (png_byte)(trans_color->red & 0xff); + png_byte green_low = (png_byte)(trans_color->green & 0xff); + png_byte blue_low = (png_byte)(trans_color->blue & 0xff); sp = row + row_info->rowbytes - 1; dp = row + (png_size_t)(row_width << 3) - 1; for (i = 0; i < row_width; i++) { if (*(sp - 5) == red_high && - *(sp - 4) == red_low && - *(sp - 3) == green_high && - *(sp - 2) == green_low && - *(sp - 1) == blue_high && - *(sp ) == blue_low) + *(sp - 4) == red_low && + *(sp - 3) == green_high && + *(sp - 2) == green_low && + *(sp - 1) == blue_high && + *(sp ) == blue_low) { *dp-- = 0; *dp-- = 0; } + else { *dp-- = 0xff; *dp-- = 0xff; } + *dp-- = *sp--; *dp-- = *sp--; *dp-- = *sp--; @@ -3790,10 +4783,41 @@ png_do_expand(png_row_infop row_info, png_bytep row, } #endif +#ifdef PNG_READ_EXPAND_16_SUPPORTED +/* If the bit depth is 8 and the color type is not a palette type expand the + * whole row to 16 bits. Has no effect otherwise. + */ +void /* PRIVATE */ +png_do_expand_16(png_row_infop row_info, png_bytep row) +{ + if (row_info->bit_depth == 8 && + row_info->color_type != PNG_COLOR_TYPE_PALETTE) + { + /* The row have a sequence of bytes containing [0..255] and we need + * to turn it into another row containing [0..65535], to do this we + * calculate: + * + * (input / 255) * 65535 + * + * Which happens to be exactly input * 257 and this can be achieved + * simply by byte replication in place (copying backwards). + */ + png_byte *sp = row + row_info->rowbytes; /* source, last byte + 1 */ + png_byte *dp = sp + row_info->rowbytes; /* destination, end + 1 */ + while (dp > sp) + dp[-2] = dp[-1] = *--sp, dp -= 2; + + row_info->rowbytes *= 2; + row_info->bit_depth = 16; + row_info->pixel_depth = (png_byte)(row_info->channels * 16); + } +} +#endif + #ifdef PNG_READ_QUANTIZE_SUPPORTED void /* PRIVATE */ png_do_quantize(png_row_infop row_info, png_bytep row, - png_bytep palette_lookup, png_bytep quantize_lookup) + png_const_bytep palette_lookup, png_const_bytep quantize_lookup) { png_bytep sp, dp; png_uint_32 i; @@ -3801,9 +4825,9 @@ png_do_quantize(png_row_infop row_info, png_bytep row, png_debug(1, "in png_do_quantize"); + if (row_info->bit_depth == 8) { - if (row_info->color_type == PNG_COLOR_TYPE_RGB && - palette_lookup && row_info->bit_depth == 8) + if (row_info->color_type == PNG_COLOR_TYPE_RGB && palette_lookup) { int r, g, b, p; sp = row; @@ -3822,23 +4846,25 @@ png_do_quantize(png_row_infop row_info, png_bytep row, * ((b >> 3) & 0x1f); */ p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) & - ((1 << PNG_QUANTIZE_RED_BITS) - 1)) << - (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) | - (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) & - ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) << - (PNG_QUANTIZE_BLUE_BITS)) | - ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) & - ((1 << PNG_QUANTIZE_BLUE_BITS) - 1)); + ((1 << PNG_QUANTIZE_RED_BITS) - 1)) << + (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) | + (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) & + ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) << + (PNG_QUANTIZE_BLUE_BITS)) | + ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) & + ((1 << PNG_QUANTIZE_BLUE_BITS) - 1)); *dp++ = palette_lookup[p]; } + row_info->color_type = PNG_COLOR_TYPE_PALETTE; row_info->channels = 1; row_info->pixel_depth = row_info->bit_depth; row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); } + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA && - palette_lookup != NULL && row_info->bit_depth == 8) + palette_lookup != NULL) { int r, g, b, p; sp = row; @@ -3851,25 +4877,28 @@ png_do_quantize(png_row_infop row_info, png_bytep row, sp++; p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) & - ((1 << PNG_QUANTIZE_RED_BITS) - 1)) << - (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) | - (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) & - ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) << - (PNG_QUANTIZE_BLUE_BITS)) | - ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) & - ((1 << PNG_QUANTIZE_BLUE_BITS) - 1)); + ((1 << PNG_QUANTIZE_RED_BITS) - 1)) << + (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) | + (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) & + ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) << + (PNG_QUANTIZE_BLUE_BITS)) | + ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) & + ((1 << PNG_QUANTIZE_BLUE_BITS) - 1)); *dp++ = palette_lookup[p]; } + row_info->color_type = PNG_COLOR_TYPE_PALETTE; row_info->channels = 1; row_info->pixel_depth = row_info->bit_depth; row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); } + else if (row_info->color_type == PNG_COLOR_TYPE_PALETTE && - quantize_lookup && row_info->bit_depth == 8) + quantize_lookup) { sp = row; + for (i = 0; i < row_width; i++, sp++) { *sp = quantize_lookup[*sp]; @@ -3877,266 +4906,8 @@ png_do_quantize(png_row_infop row_info, png_bytep row, } } } -#endif - -#ifdef PNG_FLOATING_POINT_SUPPORTED -#ifdef PNG_READ_GAMMA_SUPPORTED -static PNG_CONST int png_gamma_shift[] = - {0x10, 0x21, 0x42, 0x84, 0x110, 0x248, 0x550, 0xff0, 0x00}; - -/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit - * tables, we don't make a full table if we are reducing to 8-bit in - * the future. Note also how the gamma_16 tables are segmented so that - * we don't need to allocate > 64K chunks for a full 16-bit table. - * - * See the PNG extensions document for an integer algorithm for creating - * the gamma tables. Maybe we will implement that here someday. - * - * We should only reach this point if - * - * the file_gamma is known (i.e., the gAMA or sRGB chunk is present, - * or the application has provided a file_gamma) - * - * AND - * { - * the screen_gamma is known - * - * OR - * - * RGB_to_gray transformation is being performed - * } - * - * AND - * { - * the screen_gamma is different from the reciprocal of the - * file_gamma by more than the specified threshold - * - * OR - * - * a background color has been specified and the file_gamma - * and screen_gamma are not 1.0, within the specified threshold. - * } - */ - -void /* PRIVATE */ -png_build_gamma_table(png_structp png_ptr, png_byte bit_depth) -{ - png_debug(1, "in png_build_gamma_table"); - - if (bit_depth <= 8) - { - int i; - double g; - - if (png_ptr->screen_gamma > .000001) - g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - - else - g = 1.0; - - png_ptr->gamma_table = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_table[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - } - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ - defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & ((PNG_BACKGROUND) | PNG_RGB_TO_GRAY)) - { - - g = 1.0 / (png_ptr->gamma); - - png_ptr->gamma_to_1 = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_to_1[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - } - - - png_ptr->gamma_from_1 = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - if (png_ptr->screen_gamma > 0.000001) - g = 1.0 / png_ptr->screen_gamma; - - else - g = png_ptr->gamma; /* Probably doing rgb_to_gray */ - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_from_1[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - - } - } -#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */ - } - else - { - double g; - int i, j, shift, num; - int sig_bit; - png_uint_32 ig; - - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - { - sig_bit = (int)png_ptr->sig_bit.red; - - if ((int)png_ptr->sig_bit.green > sig_bit) - sig_bit = png_ptr->sig_bit.green; - - if ((int)png_ptr->sig_bit.blue > sig_bit) - sig_bit = png_ptr->sig_bit.blue; - } - else - { - sig_bit = (int)png_ptr->sig_bit.gray; - } - - if (sig_bit > 0) - shift = 16 - sig_bit; - - else - shift = 0; - - if (png_ptr->transformations & PNG_16_TO_8) - { - if (shift < (16 - PNG_MAX_GAMMA_8)) - shift = (16 - PNG_MAX_GAMMA_8); - } - - if (shift > 8) - shift = 8; - - if (shift < 0) - shift = 0; - - png_ptr->gamma_shift = (png_byte)shift; - - num = (1 << (8 - shift)); - - if (png_ptr->screen_gamma > .000001) - g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - else - g = 1.0; - - png_ptr->gamma_16_table = (png_uint_16pp)png_calloc(png_ptr, - (png_uint_32)(num * png_sizeof(png_uint_16p))); - - if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND)) - { - double fin, fout; - png_uint_32 last, max; - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * png_sizeof(png_uint_16))); - } - - g = 1.0 / g; - last = 0; - for (i = 0; i < 256; i++) - { - fout = ((double)i + 0.5) / 256.0; - fin = pow(fout, g); - max = (png_uint_32)(fin * (double)((png_uint_32)num << 8)); - while (last <= max) - { - png_ptr->gamma_16_table[(int)(last & (0xff >> shift))] - [(int)(last >> (8 - shift))] = (png_uint_16)( - (png_uint_16)i | ((png_uint_16)i << 8)); - last++; - } - } - while (last < ((png_uint_32)num << 8)) - { - png_ptr->gamma_16_table[(int)(last & (0xff >> shift))] - [(int)(last >> (8 - shift))] = (png_uint_16)65535L; - last++; - } - } - else - { - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * png_sizeof(png_uint_16))); - - ig = (((png_uint_32)i * (png_uint_32)png_gamma_shift[shift]) >> 4); - - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_table[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - } - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ - defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & (PNG_BACKGROUND | PNG_RGB_TO_GRAY)) - { - - g = 1.0 / (png_ptr->gamma); - - png_ptr->gamma_16_to_1 = (png_uint_16pp)png_calloc(png_ptr, - (png_uint_32)(num * png_sizeof(png_uint_16p ))); - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_to_1[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * png_sizeof(png_uint_16))); - - ig = (((png_uint_32)i * - (png_uint_32)png_gamma_shift[shift]) >> 4); - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_to_1[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - - if (png_ptr->screen_gamma > 0.000001) - g = 1.0 / png_ptr->screen_gamma; - - else - g = png_ptr->gamma; /* Probably doing rgb_to_gray */ - - png_ptr->gamma_16_from_1 = (png_uint_16pp)png_calloc(png_ptr, - (png_uint_32)(num * png_sizeof(png_uint_16p))); - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_from_1[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * png_sizeof(png_uint_16))); - - ig = (((png_uint_32)i * - (png_uint_32)png_gamma_shift[shift]) >> 4); - - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_from_1[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - } -#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */ - } -} -#endif -/* To do: install integer version of png_build_gamma_table here */ -#endif +#endif /* PNG_READ_QUANTIZE_SUPPORTED */ +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ #ifdef PNG_MNG_FEATURES_SUPPORTED /* Undoes intrapixel differencing */ @@ -4150,6 +4921,7 @@ png_do_read_intrapixel(png_row_infop row_info, png_bytep row) { int bytes_per_pixel; png_uint_32 row_width = row_info->width; + if (row_info->bit_depth == 8) { png_bytep rp; @@ -4166,8 +4938,8 @@ png_do_read_intrapixel(png_row_infop row_info, png_bytep row) for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) { - *(rp) = (png_byte)((256 + *rp + *(rp+1))&0xff); - *(rp+2) = (png_byte)((256 + *(rp+2) + *(rp+1))&0xff); + *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff); + *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff); } } else if (row_info->bit_depth == 16) @@ -4189,12 +4961,12 @@ png_do_read_intrapixel(png_row_infop row_info, png_bytep row) png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); - png_uint_32 red = (png_uint_32)((s0 + s1 + 65536L) & 0xffffL); - png_uint_32 blue = (png_uint_32)((s2 + s1 + 65536L) & 0xffffL); - *(rp ) = (png_byte)((red >> 8) & 0xff); - *(rp+1) = (png_byte)(red & 0xff); - *(rp+4) = (png_byte)((blue >> 8) & 0xff); - *(rp+5) = (png_byte)(blue & 0xff); + png_uint_32 red = (s0 + s1 + 65536) & 0xffff; + png_uint_32 blue = (s2 + s1 + 65536) & 0xffff; + *(rp ) = (png_byte)((red >> 8) & 0xff); + *(rp + 1) = (png_byte)(red & 0xff); + *(rp + 4) = (png_byte)((blue >> 8) & 0xff); + *(rp + 5) = (png_byte)(blue & 0xff); } } } diff --git a/src/png/pngrutil.c b/src/png/pngrutil.c index 11e412b729..72b662338c 100644 --- a/src/png/pngrutil.c +++ b/src/png/pngrutil.c @@ -1,8 +1,8 @@ /* pngrutil.c - utilities to read a PNG file * - * Last changed in libpng 1.4.4 [August 26, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -14,32 +14,68 @@ * libpng itself during the course of reading an image. */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_READ_SUPPORTED #include "pngpriv.h" -# define png_strtod(p,a,b) strtod(a,b) +#ifdef PNG_READ_SUPPORTED + +#define png_strtod(p,a,b) strtod(a,b) + png_uint_32 PNGAPI -png_get_uint_31(png_structp png_ptr, png_bytep buf) +png_get_uint_31(png_structp png_ptr, png_const_bytep buf) +{ + png_uint_32 uval = png_get_uint_32(buf); + + if (uval > PNG_UINT_31_MAX) + png_error(png_ptr, "PNG unsigned integer out of range"); + + return (uval); +} + +#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_READ_cHRM_SUPPORTED) +/* The following is a variation on the above for use with the fixed + * point values used for gAMA and cHRM. Instead of png_error it + * issues a warning and returns (-1) - an invalid value because both + * gAMA and cHRM use *unsigned* integers for fixed point values. + */ +#define PNG_FIXED_ERROR (-1) + +static png_fixed_point /* PRIVATE */ +png_get_fixed_point(png_structp png_ptr, png_const_bytep buf) { - png_uint_32 i = png_get_uint_32(buf); - if (i > PNG_UINT_31_MAX) - png_error(png_ptr, "PNG unsigned integer out of range"); - return (i); + png_uint_32 uval = png_get_uint_32(buf); + + if (uval <= PNG_UINT_31_MAX) + return (png_fixed_point)uval; /* known to be in range */ + + /* The caller can turn off the warning by passing NULL. */ + if (png_ptr != NULL) + png_warning(png_ptr, "PNG fixed point integer out of range"); + + return PNG_FIXED_ERROR; } -#ifndef PNG_USE_READ_MACROS +#endif + +#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED +/* NOTE: the read macros will obscure these definitions, so that if + * PNG_USE_READ_MACROS is set the library will not use them internally, + * but the APIs will still be available externally. + * + * The parentheses around "PNGAPI function_name" in the following three + * functions are necessary because they allow the macros to co-exist with + * these (unused but exported) functions. + */ + /* Grab an unsigned 32-bit integer from a buffer in big-endian format. */ png_uint_32 (PNGAPI -png_get_uint_32)(png_bytep buf) +png_get_uint_32)(png_const_bytep buf) { - png_uint_32 i = + png_uint_32 uval = ((png_uint_32)(*(buf )) << 24) + ((png_uint_32)(*(buf + 1)) << 16) + ((png_uint_32)(*(buf + 2)) << 8) + ((png_uint_32)(*(buf + 3)) ) ; - return (i); + return uval; } /* Grab a signed 32-bit integer from a buffer in big-endian format. The @@ -48,27 +84,66 @@ png_get_uint_32)(png_bytep buf) * the following code does a two's complement to native conversion. */ png_int_32 (PNGAPI -png_get_int_32)(png_bytep buf) +png_get_int_32)(png_const_bytep buf) { - png_uint_32 u = png_get_uint_32(buf); - if ((u & 0x80000000) == 0) /* non-negative */ - return u; + png_uint_32 uval = png_get_uint_32(buf); + if ((uval & 0x80000000) == 0) /* non-negative */ + return uval; - u = (u ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */ - return -(png_int_32)u; + uval = (uval ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */ + return -(png_int_32)uval; } /* Grab an unsigned 16-bit integer from a buffer in big-endian format. */ png_uint_16 (PNGAPI -png_get_uint_16)(png_bytep buf) +png_get_uint_16)(png_const_bytep buf) +{ + /* ANSI-C requires an int value to accomodate at least 16 bits so this + * works and allows the compiler not to worry about possible narrowing + * on 32 bit systems. (Pre-ANSI systems did not make integers smaller + * than 16 bits either.) + */ + unsigned int val = + ((unsigned int)(*buf) << 8) + + ((unsigned int)(*(buf + 1))); + + return (png_uint_16)val; +} + +#endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */ + +/* Read and check the PNG file signature */ +void /* PRIVATE */ +png_read_sig(png_structp png_ptr, png_infop info_ptr) { - png_uint_16 i = - ((png_uint_32)(*buf) << 8) + - ((png_uint_32)(*(buf + 1))); + png_size_t num_checked, num_to_check; + + /* Exit if the user application does not expect a signature. */ + if (png_ptr->sig_bytes >= 8) + return; + + num_checked = png_ptr->sig_bytes; + num_to_check = 8 - num_checked; + +#ifdef PNG_IO_STATE_SUPPORTED + png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE; +#endif - return (i); + /* The signature must be serialized in a single I/O call. */ + png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check); + png_ptr->sig_bytes = 8; + + if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) + { + if (num_checked < 4 && + png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) + png_error(png_ptr, "Not a PNG file"); + else + png_error(png_ptr, "PNG file corrupted by ASCII conversion"); + } + if (num_checked < 3) + png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE; } -#endif /* PNG_USE_READ_MACROS */ /* Read the chunk header (length + type name). * Put the type name into png_ptr->chunk_name, and return the length. @@ -80,33 +155,29 @@ png_read_chunk_header(png_structp png_ptr) png_uint_32 length; #ifdef PNG_IO_STATE_SUPPORTED - /* Inform the I/O callback that the chunk header is being read. - * PNG_IO_CHUNK_HDR requires a single I/O call. - */ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_HDR; #endif - /* Read the length and the chunk name */ + /* Read the length and the chunk name. + * This must be performed in a single I/O call. + */ png_read_data(png_ptr, buf, 8); length = png_get_uint_31(png_ptr, buf); - /* Put the chunk name into png_ptr->chunk_name */ - png_memcpy(png_ptr->chunk_name, buf + 4, 4); + /* Put the chunk name into png_ptr->chunk_name. */ + png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(buf+4); - png_debug2(0, "Reading %s chunk, length = %lu", - png_ptr->chunk_name, length); + png_debug2(0, "Reading %lx chunk, length = %lu", + (unsigned long)png_ptr->chunk_name, (unsigned long)length); - /* Reset the crc and run it over the chunk name */ + /* Reset the crc and run it over the chunk name. */ png_reset_crc(png_ptr); - png_calculate_crc(png_ptr, png_ptr->chunk_name, 4); + png_calculate_crc(png_ptr, buf + 4, 4); - /* Check to see if chunk name is valid */ + /* Check to see if chunk name is valid. */ png_check_chunk_name(png_ptr, png_ptr->chunk_name); #ifdef PNG_IO_STATE_SUPPORTED - /* Inform the I/O callback that chunk data will (possibly) be read. - * PNG_IO_CHUNK_DATA does NOT require a specific number of I/O calls. - */ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_DATA; #endif @@ -119,6 +190,7 @@ png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length) { if (png_ptr == NULL) return; + png_read_data(png_ptr, buf, length); png_calculate_crc(png_ptr, buf, length); } @@ -138,6 +210,7 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip) { png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); } + if (i) { png_crc_read(png_ptr, png_ptr->zbuf, i); @@ -145,18 +218,19 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip) if (png_crc_error(png_ptr)) { - if (((png_ptr->chunk_name[0] & 0x20) && /* Ancillary */ - !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) || - (!(png_ptr->chunk_name[0] & 0x20) && /* Critical */ - (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE))) + if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name) ? + !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) : + (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)) { png_chunk_warning(png_ptr, "CRC error"); } + else { png_chunk_benign_error(png_ptr, "CRC error"); return (0); } + return (1); } @@ -173,24 +247,24 @@ png_crc_error(png_structp png_ptr) png_uint_32 crc; int need_crc = 1; - if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ + if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) { if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) need_crc = 0; } - else /* critical */ + + else /* critical */ { if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) need_crc = 0; } #ifdef PNG_IO_STATE_SUPPORTED - /* Inform the I/O callback that the chunk CRC is being read */ - /* PNG_IO_CHUNK_CRC requires the I/O to be done at once */ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_CRC; #endif + /* The chunk CRC must be serialized in a single I/O call. */ png_read_data(png_ptr, crc_bytes, 4); if (need_crc) @@ -198,25 +272,58 @@ png_crc_error(png_structp png_ptr) crc = png_get_uint_32(crc_bytes); return ((int)(crc != png_ptr->crc)); } + else return (0); } -#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \ - defined(PNG_READ_iCCP_SUPPORTED) +#ifdef PNG_READ_COMPRESSED_TEXT_SUPPORTED static png_size_t -png_inflate(png_structp png_ptr, const png_byte *data, png_size_t size, - png_bytep output, png_size_t output_size) +png_inflate(png_structp png_ptr, png_bytep data, png_size_t size, + png_bytep output, png_size_t output_size) { png_size_t count = 0; - png_ptr->zstream.next_in = (png_bytep)data; /* const_cast: VALID */ - png_ptr->zstream.avail_in = size; + /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't + * even necessarily handle 65536 bytes) because the type uInt is "16 bits or + * more". Consequently it is necessary to chunk the input to zlib. This + * code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the maximum value + * that can be stored in a uInt.) It is possible to set ZLIB_IO_MAX to a + * lower value in pngpriv.h and this may sometimes have a performance + * advantage, because it forces access of the input data to be separated from + * at least some of the use by some period of time. + */ + png_ptr->zstream.next_in = data; + /* avail_in is set below from 'size' */ + png_ptr->zstream.avail_in = 0; while (1) { int ret, avail; + /* The setting of 'avail_in' used to be outside the loop; by setting it + * inside it is possible to chunk the input to zlib and simply rely on + * zlib to advance the 'next_in' pointer. This allows arbitrary amounts o + * data to be passed through zlib at the unavoidable cost of requiring a + * window save (memcpy of up to 32768 output bytes) every ZLIB_IO_MAX + * input bytes. + */ + if (png_ptr->zstream.avail_in == 0 && size > 0) + { + if (size <= ZLIB_IO_MAX) + { + /* The value is less than ZLIB_IO_MAX so the cast is safe: */ + png_ptr->zstream.avail_in = (uInt)size; + size = 0; + } + + else + { + png_ptr->zstream.avail_in = ZLIB_IO_MAX; + size -= ZLIB_IO_MAX; + } + } + /* Reset the output buffer each time round - we empty it * after every inflate call. */ @@ -231,13 +338,18 @@ png_inflate(png_structp png_ptr, const png_byte *data, png_size_t size, */ if ((ret == Z_OK || ret == Z_STREAM_END) && avail > 0) { + png_size_t space = avail; /* > 0, see above */ + if (output != 0 && output_size > count) { - int copy = output_size - count; - if (avail < copy) copy = avail; + png_size_t copy = output_size - count; + + if (space < copy) + copy = space; + png_memcpy(output + count, png_ptr->zbuf, copy); } - count += avail; + count += space; } if (ret == Z_OK) @@ -256,39 +368,33 @@ png_inflate(png_structp png_ptr, const png_byte *data, png_size_t size, * and the error message is dumped into the uncompressed * buffer if available. */ +# ifdef PNG_WARNINGS_SUPPORTED { - PNG_CONST char *msg; + png_const_charp msg; + if (png_ptr->zstream.msg != 0) msg = png_ptr->zstream.msg; - else + + else switch (ret) { -#ifdef PNG_STDIO_SUPPORTED - char umsg[52]; + case Z_BUF_ERROR: + msg = "Buffer error in compressed datastream"; + break; - switch (ret) - { - case Z_BUF_ERROR: - msg = "Buffer error in compressed datastream in %s chunk"; - break; - case Z_DATA_ERROR: - msg = "Data error in compressed datastream in %s chunk"; - break; - default: - msg = "Incomplete compressed datastream in %s chunk"; - break; - } + case Z_DATA_ERROR: + msg = "Data error in compressed datastream"; + break; - png_snprintf(umsg, sizeof umsg, msg, png_ptr->chunk_name); - msg = umsg; -#else - msg = "Damaged compressed datastream in chunk other than IDAT"; -#endif + default: + msg = "Incomplete compressed datastream"; + break; } - png_warning(png_ptr, msg); + png_chunk_warning(png_ptr, msg); } +# endif - /* 0 means an error - notice that this code simple ignores + /* 0 means an error - notice that this code simply ignores * zero length compressed chunks as a result. */ return 0; @@ -318,9 +424,10 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, else if (comp_type == PNG_COMPRESSION_TYPE_BASE) { png_size_t expanded_size = png_inflate(png_ptr, - (png_bytep)(png_ptr->chunkdata + prefix_size), - chunklength - prefix_size, - 0/*output*/, 0/*output size*/); + (png_bytep)(png_ptr->chunkdata + prefix_size), + chunklength - prefix_size, + 0, /* output */ + 0); /* output size */ /* Now check the limits on this chunk - if the limit fails the * compressed data will be removed, the prefix will remain. @@ -343,14 +450,15 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, */ #if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \ defined(PNG_USER_CHUNK_MALLOC_MAX) - else -#endif + else if (expanded_size > 0) +#else if (expanded_size > 0) +#endif { /* Success (maybe) - really uncompress the chunk. */ png_size_t new_size = 0; - png_charp text = png_malloc_warn(png_ptr, - prefix_size + expanded_size + 1); + png_charp text = (png_charp)png_malloc_warn(png_ptr, + prefix_size + expanded_size + 1); if (text != NULL) { @@ -372,22 +480,17 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, png_warning(png_ptr, "png_inflate logic error"); png_free(png_ptr, text); } + else - png_warning(png_ptr, "Not enough memory to decompress chunk"); + png_warning(png_ptr, "Not enough memory to decompress chunk"); } } else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */ { -#ifdef PNG_STDIO_SUPPORTED - char umsg[50]; - - png_snprintf(umsg, sizeof umsg, "Unknown zTXt compression type %d", - comp_type); - png_warning(png_ptr, umsg); -#else - png_warning(png_ptr, "Unknown zTXt compression type"); -#endif + PNG_WARNING_PARAMETERS(p) + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, comp_type); + png_formatted_warning(png_ptr, p, "Unknown zTXt compression type @1"); /* The recovery is to simply drop the data. */ } @@ -397,11 +500,13 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, * amount of compressed data. */ { - png_charp text = png_malloc_warn(png_ptr, prefix_size + 1); + png_charp text = (png_charp)png_malloc_warn(png_ptr, prefix_size + 1); + if (text != NULL) { if (prefix_size > 0) png_memcpy(text, png_ptr->chunkdata, prefix_size); + png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = text; @@ -413,7 +518,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, *newlength = prefix_size; } -#endif +#endif /* PNG_READ_COMPRESSED_TEXT_SUPPORTED */ /* Read and check the IDHR chunk */ void /* PRIVATE */ @@ -460,6 +565,7 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) /* Find number of channels */ switch (png_ptr->color_type) { + default: /* invalid, png_set_IHDR calls png_error */ case PNG_COLOR_TYPE_GRAY: case PNG_COLOR_TYPE_PALETTE: png_ptr->channels = 1; @@ -484,9 +590,9 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width); png_debug1(3, "bit_depth = %d", png_ptr->bit_depth); png_debug1(3, "channels = %d", png_ptr->channels); - png_debug1(3, "rowbytes = %lu", png_ptr->rowbytes); + png_debug1(3, "rowbytes = %lu", (unsigned long)png_ptr->rowbytes); png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, - color_type, interlace_type, compression_type, filter_type); + color_type, interlace_type, compression_type, filter_type); } /* Read and check the palette */ @@ -519,10 +625,11 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR)) { png_warning(png_ptr, - "Ignoring PLTE chunk in grayscale PNG"); + "Ignoring PLTE chunk in grayscale PNG"); png_crc_finish(png_ptr, length); return; } + #ifndef PNG_READ_OPT_PLTE_SUPPORTED if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) { @@ -571,7 +678,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } #endif - /* If we actually NEED the PLTE chunk (ie for a paletted image), we do + /* If we actually need the PLTE chunk (ie for a paletted image), we do * whatever the normal CRC configuration tells us. However, if we * have an RGB image, the PLTE can be considered ancillary, so * we will act as though it is. @@ -582,25 +689,29 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { png_crc_finish(png_ptr, 0); } + #ifndef PNG_READ_OPT_PLTE_SUPPORTED else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */ { /* If we don't want to use the data from an ancillary chunk, - we have two options: an error abort, or a warning and we - ignore the data in this chunk (which should be OK, since - it's considered ancillary for a RGB or RGBA image). */ + * we have two options: an error abort, or a warning and we + * ignore the data in this chunk (which should be OK, since + * it's considered ancillary for a RGB or RGBA image). + */ if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE)) { if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) { png_chunk_benign_error(png_ptr, "CRC error"); } + else { png_chunk_warning(png_ptr, "CRC error"); return; } } + /* Otherwise, we (optionally) emit a warning and use the chunk. */ else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) { @@ -621,6 +732,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_warning(png_ptr, "Truncating incorrect tRNS chunk length"); png_ptr->num_trans = (png_uint_16)num; } + if (info_ptr->num_trans > (png_uint_16)num) { png_warning(png_ptr, "Truncating incorrect info tRNS chunk length"); @@ -648,9 +760,10 @@ png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { png_warning(png_ptr, "Incorrect IEND chunk length"); } + png_crc_finish(png_ptr, length); - info_ptr = info_ptr; /* Quiet compiler warnings about unused info_ptr */ + PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ } #ifdef PNG_READ_gAMA_SUPPORTED @@ -658,30 +771,29 @@ void /* PRIVATE */ png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { png_fixed_point igamma; -#ifdef PNG_FLOATING_POINT_SUPPORTED - float file_gamma; -#endif png_byte buf[4]; png_debug(1, "in png_handle_gAMA"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before gAMA"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid gAMA after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (png_ptr->mode & PNG_HAVE_PLTE) /* Should be an error, but we can cope with it */ png_warning(png_ptr, "Out of place gAMA chunk"); if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) #ifdef PNG_READ_sRGB_SUPPORTED - && !(info_ptr->valid & PNG_INFO_sRGB) + && !(info_ptr->valid & PNG_INFO_sRGB) #endif - ) + ) { png_warning(png_ptr, "Duplicate gAMA chunk"); png_crc_finish(png_ptr, length); @@ -696,41 +808,41 @@ png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_crc_read(png_ptr, buf, 4); + if (png_crc_finish(png_ptr, 0)) return; - igamma = (png_fixed_point)png_get_uint_32(buf); - /* Check for zero gamma */ - if (igamma == 0) - { - png_warning(png_ptr, - "Ignoring gAMA chunk with gamma=0"); - return; - } + igamma = png_get_fixed_point(NULL, buf); -#ifdef PNG_READ_sRGB_SUPPORTED + /* Check for zero gamma or an error. */ + if (igamma <= 0) + { + png_warning(png_ptr, + "Ignoring gAMA chunk with out of range gamma"); + + return; + } + +# ifdef PNG_READ_sRGB_SUPPORTED if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) - if (PNG_OUT_OF_RANGE(igamma, 45500L, 500)) + { + if (PNG_OUT_OF_RANGE(igamma, 45500, 500)) { - png_warning(png_ptr, - "Ignoring incorrect gAMA value when sRGB is also present"); -#ifdef PNG_CONSOLE_IO_SUPPORTED - fprintf(stderr, "gamma = (%d/100000)", (int)igamma); -#endif + PNG_WARNING_PARAMETERS(p) + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, igamma); + png_formatted_warning(png_ptr, p, + "Ignoring incorrect gAMA value @1 when sRGB is also present"); return; } -#endif /* PNG_READ_sRGB_SUPPORTED */ + } +# endif /* PNG_READ_sRGB_SUPPORTED */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - file_gamma = (float)igamma / (float)100000.0; # ifdef PNG_READ_GAMMA_SUPPORTED - png_ptr->gamma = file_gamma; + /* Gamma correction on read is supported. */ + png_ptr->gamma = igamma; # endif - png_set_gAMA(png_ptr, info_ptr, file_gamma); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED + /* And set the 'info' structure members. */ png_set_gAMA_fixed(png_ptr, info_ptr, igamma); -#endif } #endif @@ -747,17 +859,20 @@ png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before sBIT"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid sBIT after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (png_ptr->mode & PNG_HAVE_PLTE) { /* Should be an error, but we can cope with it */ png_warning(png_ptr, "Out of place sBIT chunk"); } + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)) { png_warning(png_ptr, "Duplicate sBIT chunk"); @@ -767,6 +882,7 @@ png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) truelen = 3; + else truelen = (png_size_t)png_ptr->channels; @@ -778,6 +894,7 @@ png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_crc_read(png_ptr, buf, truelen); + if (png_crc_finish(png_ptr, 0)) return; @@ -788,6 +905,7 @@ png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_ptr->sig_bit.blue = buf[2]; png_ptr->sig_bit.alpha = buf[3]; } + else { png_ptr->sig_bit.gray = buf[0]; @@ -796,6 +914,7 @@ png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_ptr->sig_bit.blue = buf[0]; png_ptr->sig_bit.alpha = buf[1]; } + png_set_sBIT(png_ptr, info_ptr, &(png_ptr->sig_bit)); } #endif @@ -805,32 +924,29 @@ void /* PRIVATE */ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { png_byte buf[32]; -#ifdef PNG_FLOATING_POINT_SUPPORTED - float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; -#endif - png_fixed_point int_x_white, int_y_white, int_x_red, int_y_red, int_x_green, - int_y_green, int_x_blue, int_y_blue; - - png_uint_32 uint_x, uint_y; + png_fixed_point x_white, y_white, x_red, y_red, x_green, y_green, x_blue, + y_blue; png_debug(1, "in png_handle_cHRM"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before cHRM"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid cHRM after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (png_ptr->mode & PNG_HAVE_PLTE) /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Missing PLTE before cHRM"); + png_warning(png_ptr, "Out of place cHRM chunk"); if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM) -#ifdef PNG_READ_sRGB_SUPPORTED - && !(info_ptr->valid & PNG_INFO_sRGB) -#endif +# ifdef PNG_READ_sRGB_SUPPORTED + && !(info_ptr->valid & PNG_INFO_sRGB) +# endif ) { png_warning(png_ptr, "Duplicate cHRM chunk"); @@ -846,83 +962,145 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_crc_read(png_ptr, buf, 32); + if (png_crc_finish(png_ptr, 0)) return; - uint_x = png_get_uint_32(buf); - uint_y = png_get_uint_32(buf + 4); - int_x_white = (png_fixed_point)uint_x; - int_y_white = (png_fixed_point)uint_y; - - uint_x = png_get_uint_32(buf + 8); - uint_y = png_get_uint_32(buf + 12); - int_x_red = (png_fixed_point)uint_x; - int_y_red = (png_fixed_point)uint_y; - - uint_x = png_get_uint_32(buf + 16); - uint_y = png_get_uint_32(buf + 20); - int_x_green = (png_fixed_point)uint_x; - int_y_green = (png_fixed_point)uint_y; - - uint_x = png_get_uint_32(buf + 24); - uint_y = png_get_uint_32(buf + 28); - int_x_blue = (png_fixed_point)uint_x; - int_y_blue = (png_fixed_point)uint_y; + x_white = png_get_fixed_point(NULL, buf); + y_white = png_get_fixed_point(NULL, buf + 4); + x_red = png_get_fixed_point(NULL, buf + 8); + y_red = png_get_fixed_point(NULL, buf + 12); + x_green = png_get_fixed_point(NULL, buf + 16); + y_green = png_get_fixed_point(NULL, buf + 20); + x_blue = png_get_fixed_point(NULL, buf + 24); + y_blue = png_get_fixed_point(NULL, buf + 28); -#ifdef PNG_FLOATING_POINT_SUPPORTED - white_x = (float)int_x_white / (float)100000.0; - white_y = (float)int_y_white / (float)100000.0; - red_x = (float)int_x_red / (float)100000.0; - red_y = (float)int_y_red / (float)100000.0; - green_x = (float)int_x_green / (float)100000.0; - green_y = (float)int_y_green / (float)100000.0; - blue_x = (float)int_x_blue / (float)100000.0; - blue_y = (float)int_y_blue / (float)100000.0; -#endif + if (x_white == PNG_FIXED_ERROR || + y_white == PNG_FIXED_ERROR || + x_red == PNG_FIXED_ERROR || + y_red == PNG_FIXED_ERROR || + x_green == PNG_FIXED_ERROR || + y_green == PNG_FIXED_ERROR || + x_blue == PNG_FIXED_ERROR || + y_blue == PNG_FIXED_ERROR) + { + png_warning(png_ptr, "Ignoring cHRM chunk with negative chromaticities"); + return; + } #ifdef PNG_READ_sRGB_SUPPORTED if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB)) + { + if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) || + PNG_OUT_OF_RANGE(y_white, 32900, 1000) || + PNG_OUT_OF_RANGE(x_red, 64000, 1000) || + PNG_OUT_OF_RANGE(y_red, 33000, 1000) || + PNG_OUT_OF_RANGE(x_green, 30000, 1000) || + PNG_OUT_OF_RANGE(y_green, 60000, 1000) || + PNG_OUT_OF_RANGE(x_blue, 15000, 1000) || + PNG_OUT_OF_RANGE(y_blue, 6000, 1000)) { - if (PNG_OUT_OF_RANGE(int_x_white, 31270, 1000) || - PNG_OUT_OF_RANGE(int_y_white, 32900, 1000) || - PNG_OUT_OF_RANGE(int_x_red, 64000L, 1000) || - PNG_OUT_OF_RANGE(int_y_red, 33000, 1000) || - PNG_OUT_OF_RANGE(int_x_green, 30000, 1000) || - PNG_OUT_OF_RANGE(int_y_green, 60000L, 1000) || - PNG_OUT_OF_RANGE(int_x_blue, 15000, 1000) || - PNG_OUT_OF_RANGE(int_y_blue, 6000, 1000)) - { - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); -#ifdef PNG_CONSOLE_IO_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED - fprintf(stderr, "wx=%f, wy=%f, rx=%f, ry=%f\n", - white_x, white_y, red_x, red_y); - fprintf(stderr, "gx=%f, gy=%f, bx=%f, by=%f\n", - green_x, green_y, blue_x, blue_y); -#else - fprintf(stderr, "wx=%ld, wy=%ld, rx=%ld, ry=%ld\n", - (long)int_x_white, (long)int_y_white, - (long)int_x_red, (long)int_y_red); - fprintf(stderr, "gx=%ld, gy=%ld, bx=%ld, by=%ld\n", - (long)int_x_green, (long)int_y_green, - (long)int_x_blue, (long)int_y_blue); -#endif -#endif /* PNG_CONSOLE_IO_SUPPORTED */ - } - return; + PNG_WARNING_PARAMETERS(p) + + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, x_white); + png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_fixed, y_white); + png_warning_parameter_signed(p, 3, PNG_NUMBER_FORMAT_fixed, x_red); + png_warning_parameter_signed(p, 4, PNG_NUMBER_FORMAT_fixed, y_red); + png_warning_parameter_signed(p, 5, PNG_NUMBER_FORMAT_fixed, x_green); + png_warning_parameter_signed(p, 6, PNG_NUMBER_FORMAT_fixed, y_green); + png_warning_parameter_signed(p, 7, PNG_NUMBER_FORMAT_fixed, x_blue); + png_warning_parameter_signed(p, 8, PNG_NUMBER_FORMAT_fixed, y_blue); + + png_formatted_warning(png_ptr, p, + "Ignoring incorrect cHRM white(@1,@2) r(@3,@4)g(@5,@6)b(@7,@8) " + "when sRGB is also present"); } + return; + } #endif /* PNG_READ_sRGB_SUPPORTED */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_cHRM(png_ptr, info_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_set_cHRM_fixed(png_ptr, info_ptr, - int_x_white, int_y_white, int_x_red, int_y_red, int_x_green, - int_y_green, int_x_blue, int_y_blue); +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Store the _white values as default coefficients for the rgb to gray + * operation if it is supported. Check if the transform is already set to + * avoid destroying the transform values. + */ + if (!png_ptr->rgb_to_gray_coefficients_set) + { + /* png_set_background has not been called and we haven't seen an sRGB + * chunk yet. Find the XYZ of the three end points. + */ + png_XYZ XYZ; + png_xy xy; + + xy.redx = x_red; + xy.redy = y_red; + xy.greenx = x_green; + xy.greeny = y_green; + xy.bluex = x_blue; + xy.bluey = y_blue; + xy.whitex = x_white; + xy.whitey = y_white; + + if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) + { + /* The success case, because XYZ_from_xy normalises to a reference + * white Y of 1.0 we just need to scale the numbers. This should + * always work just fine. It is an internal error if this overflows. + */ + { + png_fixed_point r, g, b; + if (png_muldiv(&r, XYZ.redY, 32768, PNG_FP_1) && + r >= 0 && r <= 32768 && + png_muldiv(&g, XYZ.greenY, 32768, PNG_FP_1) && + g >= 0 && g <= 32768 && + png_muldiv(&b, XYZ.blueY, 32768, PNG_FP_1) && + b >= 0 && b <= 32768 && + r+g+b <= 32769) + { + /* We allow 0 coefficients here. r+g+b may be 32769 if two or + * all of the coefficients were rounded up. Handle this by + * reducing the *largest* coefficient by 1; this matches the + * approach used for the default coefficients in pngrtran.c + */ + int add = 0; + + if (r+g+b > 32768) + add = -1; + else if (r+g+b < 32768) + add = 1; + + if (add != 0) + { + if (g >= r && g >= b) + g += add; + else if (r >= g && r >= b) + r += add; + else + b += add; + } + + /* Check for an internal error. */ + if (r+g+b != 32768) + png_error(png_ptr, + "internal error handling cHRM coefficients"); + + png_ptr->rgb_to_gray_red_coeff = (png_uint_16)r; + png_ptr->rgb_to_gray_green_coeff = (png_uint_16)g; + } + + /* This is a png_error at present even though it could be ignored - + * it should never happen, but it is important that if it does, the + * bug is fixed. + */ + else + png_error(png_ptr, "internal error handling cHRM->XYZ"); + } + } + } #endif + + png_set_cHRM_fixed(png_ptr, info_ptr, x_white, y_white, x_red, y_red, + x_green, y_green, x_blue, y_blue); } #endif @@ -937,12 +1115,14 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before sRGB"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid sRGB after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (png_ptr->mode & PNG_HAVE_PLTE) /* Should be an error, but we can cope with it */ png_warning(png_ptr, "Out of place sRGB chunk"); @@ -962,10 +1142,12 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_crc_read(png_ptr, buf, 1); + if (png_crc_finish(png_ptr, 0)) return; intent = buf[0]; + /* Check for bad intent */ if (intent >= PNG_sRGB_INTENT_LAST) { @@ -976,50 +1158,76 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)) { - png_fixed_point igamma; -#ifdef PNG_FIXED_POINT_SUPPORTED - igamma=info_ptr->int_gamma; -#else -# ifdef PNG_FLOATING_POINT_SUPPORTED - igamma=(png_fixed_point)(info_ptr->gamma * 100000.); -# endif -#endif - if (PNG_OUT_OF_RANGE(igamma, 45500L, 500)) + if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500, 500)) { - png_warning(png_ptr, - "Ignoring incorrect gAMA value when sRGB is also present"); -#ifdef PNG_CONSOLE_IO_SUPPORTED -# ifdef PNG_FIXED_POINT_SUPPORTED - fprintf(stderr, "incorrect gamma=(%d/100000)\n", - (int)png_ptr->int_gamma); -# else -# ifdef PNG_FLOATING_POINT_SUPPORTED - fprintf(stderr, "incorrect gamma=%f\n", png_ptr->gamma); -# endif -# endif -#endif + PNG_WARNING_PARAMETERS(p) + + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, + info_ptr->gamma); + + png_formatted_warning(png_ptr, p, + "Ignoring incorrect gAMA value @1 when sRGB is also present"); } } #endif /* PNG_READ_gAMA_SUPPORTED */ #ifdef PNG_READ_cHRM_SUPPORTED -#ifdef PNG_FIXED_POINT_SUPPORTED if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - if (PNG_OUT_OF_RANGE(info_ptr->int_x_white, 31270, 1000) || - PNG_OUT_OF_RANGE(info_ptr->int_y_white, 32900, 1000) || - PNG_OUT_OF_RANGE(info_ptr->int_x_red, 64000L, 1000) || - PNG_OUT_OF_RANGE(info_ptr->int_y_red, 33000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->int_x_green, 30000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->int_y_green, 60000L, 1000) || - PNG_OUT_OF_RANGE(info_ptr->int_x_blue, 15000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->int_y_blue, 6000, 1000)) - { - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); - } -#endif /* PNG_FIXED_POINT_SUPPORTED */ + if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) || + PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) || + PNG_OUT_OF_RANGE(info_ptr->x_red, 64000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->y_green, 60000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000)) + { + png_warning(png_ptr, + "Ignoring incorrect cHRM value when sRGB is also present"); + } #endif /* PNG_READ_cHRM_SUPPORTED */ + /* This is recorded for use when handling the cHRM chunk above. An sRGB + * chunk unconditionally overwrites the coefficients for grayscale conversion + * too. + */ + png_ptr->is_sRGB = 1; + +# ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Don't overwrite user supplied values: */ + if (!png_ptr->rgb_to_gray_coefficients_set) + { + /* These numbers come from the sRGB specification (or, since one has to + * pay much money to get a copy, the wikipedia sRGB page) the + * chromaticity values quoted have been inverted to get the reverse + * transformation from RGB to XYZ and the 'Y' coefficients scaled by + * 32768 (then rounded). + * + * sRGB and ITU Rec-709 both truncate the values for the D65 white + * point to four digits and, even though it actually stores five + * digits, the PNG spec gives the truncated value. + * + * This means that when the chromaticities are converted back to XYZ + * end points we end up with (6968,23435,2366), which, as described in + * pngrtran.c, would overflow. If the five digit precision and up is + * used we get, instead: + * + * 6968*R + 23435*G + 2365*B + * + * (Notice that this rounds the blue coefficient down, rather than the + * choice used in pngrtran.c which is to round the green one down.) + */ + png_ptr->rgb_to_gray_red_coeff = 6968; /* 0.212639005871510 */ + png_ptr->rgb_to_gray_green_coeff = 23434; /* 0.715168678767756 */ + /* png_ptr->rgb_to_gray_blue_coeff = 2366; 0.072192315360734 */ + + /* The following keeps the cHRM chunk from destroying the + * coefficients again in the event that it follows the sRGB chunk. + */ + png_ptr->rgb_to_gray_coefficients_set = 1; + } +# endif + png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent); } #endif /* PNG_READ_sRGB_SUPPORTED */ @@ -1033,19 +1241,22 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_bytep pC; png_charp profile; png_uint_32 skip = 0; - png_uint_32 profile_size, profile_length; + png_uint_32 profile_size; + png_alloc_size_t profile_length; png_size_t slength, prefix_length, data_length; png_debug(1, "in png_handle_iCCP"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before iCCP"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid iCCP after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (png_ptr->mode & PNG_HAVE_PLTE) /* Should be an error, but we can cope with it */ png_warning(png_ptr, "Out of place iCCP chunk"); @@ -1088,7 +1299,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) /* There should be at least one zero (the compression type byte) * following the separator, and we should be on it */ - if ( profile >= png_ptr->chunkdata + slength - 1) + if (profile >= png_ptr->chunkdata + slength - 1) { png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; @@ -1098,6 +1309,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) /* Compression_type should always be zero */ compression_type = *profile++; + if (compression_type) { png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk"); @@ -1107,11 +1319,11 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) prefix_length = profile - png_ptr->chunkdata; png_decompress_chunk(png_ptr, compression_type, - slength, prefix_length, &data_length); + slength, prefix_length, &data_length); profile_length = data_length - prefix_length; - if ( prefix_length > data_length || profile_length < 4) + if (prefix_length > data_length || profile_length < 4) { png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; @@ -1121,36 +1333,35 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) /* Check the profile_size recorded in the first 32 bits of the ICC profile */ pC = (png_bytep)(png_ptr->chunkdata + prefix_length); - profile_size = ((*(pC ))<<24) | - ((*(pC + 1))<<16) | - ((*(pC + 2))<< 8) | - ((*(pC + 3)) ); + profile_size = ((*(pC )) << 24) | + ((*(pC + 1)) << 16) | + ((*(pC + 2)) << 8) | + ((*(pC + 3)) ); + /* NOTE: the following guarantees that 'profile_length' fits into 32 bits, + * because profile_size is a 32 bit value. + */ if (profile_size < profile_length) profile_length = profile_size; + /* And the following guarantees that profile_size == profile_length. */ if (profile_size > profile_length) { -#ifdef PNG_STDIO_SUPPORTED - char umsg[50]; -#endif + PNG_WARNING_PARAMETERS(p) + png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; - png_warning(png_ptr, "Ignoring truncated iCCP profile"); -#ifdef PNG_STDIO_SUPPORTED - png_snprintf(umsg, 50, "declared profile size = %lu", - (unsigned long)profile_size); - png_warning(png_ptr, umsg); - png_snprintf(umsg, 50, "actual profile length = %lu", - (unsigned long)profile_length); - png_warning(png_ptr, umsg); -#endif + png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_u, profile_size); + png_warning_parameter_unsigned(p, 2, PNG_NUMBER_FORMAT_u, profile_length); + png_formatted_warning(png_ptr, p, + "Ignoring iCCP chunk with declared size = @1 and actual length = @2"); return; } png_set_iCCP(png_ptr, info_ptr, png_ptr->chunkdata, - compression_type, png_ptr->chunkdata + prefix_length, profile_length); + compression_type, (png_bytep)png_ptr->chunkdata + prefix_length, + profile_size); png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; } @@ -1163,12 +1374,13 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { png_bytep entry_start; png_sPLT_t new_palette; -#ifdef PNG_POINTER_INDEXING_SUPPORTED png_sPLT_entryp pp; -#endif - int data_length, entry_size, i; + png_uint_32 data_length; + int entry_size, i; png_uint_32 skip = 0; png_size_t slength; + png_uint_32 dl; + png_size_t max_dl; png_debug(1, "in png_handle_sPLT"); @@ -1181,6 +1393,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_crc_finish(png_ptr, length); return; } + if (--png_ptr->user_chunk_cache_max == 1) { png_warning(png_ptr, "No space in chunk cache for sPLT"); @@ -1192,6 +1405,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before sPLT"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid sPLT after IDAT"); @@ -1210,6 +1424,11 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); + + /* WARNING: this may break if size_t is less than 32 bits; it is assumed + * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a + * potential breakage point if the types in pngconf.h aren't exactly right. + */ slength = (png_size_t)length; png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); @@ -1225,6 +1444,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start; entry_start++) /* Empty loop to find end of name */ ; + ++entry_start; /* A sample depth should follow the separator, and we should be on it */ @@ -1238,7 +1458,12 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) new_palette.depth = *entry_start++; entry_size = (new_palette.depth == 8 ? 6 : 10); - data_length = (slength - (entry_start - (png_bytep)png_ptr->chunkdata)); + /* This must fit in a png_uint_32 because it is derived from the original + * chunk data length (and use 'length', not 'slength' here for clarity - + * they are guaranteed to be the same, see the tests above.) + */ + data_length = length - (png_uint_32)(entry_start - + (png_bytep)png_ptr->chunkdata); /* Integrity-check the data length */ if (data_length % entry_size) @@ -1249,15 +1474,20 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return; } - new_palette.nentries = (png_int_32) ( data_length / entry_size); - if ((png_uint_32) new_palette.nentries > - (png_uint_32) (PNG_SIZE_MAX / png_sizeof(png_sPLT_entry))) + dl = (png_int_32)(data_length / entry_size); + max_dl = PNG_SIZE_MAX / png_sizeof(png_sPLT_entry); + + if (dl > max_dl) { png_warning(png_ptr, "sPLT chunk too long"); return; } + + new_palette.nentries = (png_int_32)(data_length / entry_size); + new_palette.entries = (png_sPLT_entryp)png_malloc_warn( png_ptr, new_palette.nentries * png_sizeof(png_sPLT_entry)); + if (new_palette.entries == NULL) { png_warning(png_ptr, "sPLT chunk requires too much memory"); @@ -1271,40 +1501,45 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (new_palette.depth == 8) { - pp->red = *entry_start++; - pp->green = *entry_start++; - pp->blue = *entry_start++; - pp->alpha = *entry_start++; + pp->red = *entry_start++; + pp->green = *entry_start++; + pp->blue = *entry_start++; + pp->alpha = *entry_start++; } + else { - pp->red = png_get_uint_16(entry_start); entry_start += 2; - pp->green = png_get_uint_16(entry_start); entry_start += 2; - pp->blue = png_get_uint_16(entry_start); entry_start += 2; - pp->alpha = png_get_uint_16(entry_start); entry_start += 2; + pp->red = png_get_uint_16(entry_start); entry_start += 2; + pp->green = png_get_uint_16(entry_start); entry_start += 2; + pp->blue = png_get_uint_16(entry_start); entry_start += 2; + pp->alpha = png_get_uint_16(entry_start); entry_start += 2; } + pp->frequency = png_get_uint_16(entry_start); entry_start += 2; } #else pp = new_palette.entries; + for (i = 0; i < new_palette.nentries; i++) { if (new_palette.depth == 8) { - pp[i].red = *entry_start++; - pp[i].green = *entry_start++; - pp[i].blue = *entry_start++; - pp[i].alpha = *entry_start++; + pp[i].red = *entry_start++; + pp[i].green = *entry_start++; + pp[i].blue = *entry_start++; + pp[i].alpha = *entry_start++; } + else { - pp[i].red = png_get_uint_16(entry_start); entry_start += 2; - pp[i].green = png_get_uint_16(entry_start); entry_start += 2; - pp[i].blue = png_get_uint_16(entry_start); entry_start += 2; - pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2; + pp[i].red = png_get_uint_16(entry_start); entry_start += 2; + pp[i].green = png_get_uint_16(entry_start); entry_start += 2; + pp[i].blue = png_get_uint_16(entry_start); entry_start += 2; + pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2; } - pp->frequency = png_get_uint_16(entry_start); entry_start += 2; + + pp[i].frequency = png_get_uint_16(entry_start); entry_start += 2; } #endif @@ -1329,12 +1564,14 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before tRNS"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid tRNS after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) { png_warning(png_ptr, "Duplicate tRNS chunk"); @@ -1357,6 +1594,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_ptr->num_trans = 1; png_ptr->trans_color.gray = png_get_uint_16(buf); } + else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) { png_byte buf[6]; @@ -1367,12 +1605,14 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_crc_finish(png_ptr, length); return; } + png_crc_read(png_ptr, buf, (png_size_t)length); png_ptr->num_trans = 1; png_ptr->trans_color.red = png_get_uint_16(buf); png_ptr->trans_color.green = png_get_uint_16(buf + 2); png_ptr->trans_color.blue = png_get_uint_16(buf + 4); } + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { if (!(png_ptr->mode & PNG_HAVE_PLTE)) @@ -1380,6 +1620,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) /* Should be an error, but we can cope with it. */ png_warning(png_ptr, "Missing PLTE before tRNS"); } + if (length > (png_uint_32)png_ptr->num_palette || length > PNG_MAX_PALETTE_LENGTH) { @@ -1387,15 +1628,18 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_crc_finish(png_ptr, length); return; } + if (length == 0) { png_warning(png_ptr, "Zero length tRNS chunk"); png_crc_finish(png_ptr, length); return; } + png_crc_read(png_ptr, readbuf, (png_size_t)length); png_ptr->num_trans = (png_uint_16)length; } + else { png_warning(png_ptr, "tRNS chunk not allowed with alpha channel"); @@ -1410,7 +1654,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans, - &(png_ptr->trans_color)); + &(png_ptr->trans_color)); } #endif @@ -1420,24 +1664,28 @@ png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { png_size_t truelen; png_byte buf[6]; + png_color_16 background; png_debug(1, "in png_handle_bKGD"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before bKGD"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid bKGD after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) + !(png_ptr->mode & PNG_HAVE_PLTE)) { png_warning(png_ptr, "Missing PLTE before bKGD"); png_crc_finish(png_ptr, length); return; } + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)) { png_warning(png_ptr, "Duplicate bKGD chunk"); @@ -1447,8 +1695,10 @@ png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) truelen = 1; + else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) truelen = 6; + else truelen = 2; @@ -1460,46 +1710,57 @@ png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_crc_read(png_ptr, buf, truelen); + if (png_crc_finish(png_ptr, 0)) return; /* We convert the index value into RGB components so that we can allow * arbitrary RGB values for background when we have transparency, and * so it is easy to determine the RGB values of the background color - * from the info_ptr struct. */ + * from the info_ptr struct. + */ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { - png_ptr->background.index = buf[0]; + background.index = buf[0]; + if (info_ptr && info_ptr->num_palette) { - if (buf[0] >= info_ptr->num_palette) - { - png_warning(png_ptr, "Incorrect bKGD chunk index value"); - return; - } - png_ptr->background.red = - (png_uint_16)png_ptr->palette[buf[0]].red; - png_ptr->background.green = - (png_uint_16)png_ptr->palette[buf[0]].green; - png_ptr->background.blue = - (png_uint_16)png_ptr->palette[buf[0]].blue; + if (buf[0] >= info_ptr->num_palette) + { + png_warning(png_ptr, "Incorrect bKGD chunk index value"); + return; + } + + background.red = (png_uint_16)png_ptr->palette[buf[0]].red; + background.green = (png_uint_16)png_ptr->palette[buf[0]].green; + background.blue = (png_uint_16)png_ptr->palette[buf[0]].blue; } + + else + background.red = background.green = background.blue = 0; + + background.gray = 0; } + else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */ { - png_ptr->background.red = - png_ptr->background.green = - png_ptr->background.blue = - png_ptr->background.gray = png_get_uint_16(buf); + background.index = 0; + background.red = + background.green = + background.blue = + background.gray = png_get_uint_16(buf); } + else { - png_ptr->background.red = png_get_uint_16(buf); - png_ptr->background.green = png_get_uint_16(buf + 2); - png_ptr->background.blue = png_get_uint_16(buf + 4); + background.index = 0; + background.red = png_get_uint_16(buf); + background.green = png_get_uint_16(buf + 2); + background.blue = png_get_uint_16(buf + 4); + background.gray = 0; } - png_set_bKGD(png_ptr, info_ptr, &(png_ptr->background)); + png_set_bKGD(png_ptr, info_ptr, &background); } #endif @@ -1514,18 +1775,21 @@ png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before hIST"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid hIST after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (!(png_ptr->mode & PNG_HAVE_PLTE)) { png_warning(png_ptr, "Missing PLTE before hIST"); png_crc_finish(png_ptr, length); return; } + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)) { png_warning(png_ptr, "Duplicate hIST chunk"); @@ -1534,8 +1798,9 @@ png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } num = length / 2 ; - if (num != (unsigned int) png_ptr->num_palette || num > - (unsigned int) PNG_MAX_PALETTE_LENGTH) + + if (num != (unsigned int)png_ptr->num_palette || num > + (unsigned int)PNG_MAX_PALETTE_LENGTH) { png_warning(png_ptr, "Incorrect hIST chunk length"); png_crc_finish(png_ptr, length); @@ -1569,12 +1834,14 @@ png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before pHYs"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid pHYs after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) { png_warning(png_ptr, "Duplicate pHYs chunk"); @@ -1590,6 +1857,7 @@ png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_crc_read(png_ptr, buf, 9); + if (png_crc_finish(png_ptr, 0)) return; @@ -1612,12 +1880,14 @@ png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before oFFs"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid oFFs after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) { png_warning(png_ptr, "Duplicate oFFs chunk"); @@ -1633,6 +1903,7 @@ png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_crc_read(png_ptr, buf, 9); + if (png_crc_finish(png_ptr, 0)) return; @@ -1659,12 +1930,14 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before pCAL"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid pCAL after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)) { png_warning(png_ptr, "Duplicate pCAL chunk"); @@ -1672,15 +1945,17 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return; } - png_debug1(2, "Allocating and reading pCAL chunk data (%lu bytes)", - length + 1); + png_debug1(2, "Allocating and reading pCAL chunk data (%u bytes)", + length + 1); png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + if (png_ptr->chunkdata == NULL) - { - png_warning(png_ptr, "No memory for pCAL purpose"); - return; - } + { + png_warning(png_ptr, "No memory for pCAL purpose"); + return; + } + slength = (png_size_t)length; png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); @@ -1700,7 +1975,8 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) endptr = png_ptr->chunkdata + slength; /* We need to have at least 12 bytes after the purpose string - in order to get the parameter information. */ + * in order to get the parameter information. + */ if (endptr <= buf + 12) { png_warning(png_ptr, "Invalid pCAL data"); @@ -1718,7 +1994,8 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_debug(3, "Checking pCAL equation type and number of parameters"); /* Check that we have the right number of parameters for known - equation types. */ + * equation types. + */ if ((type == PNG_EQUATION_LINEAR && nparams != 2) || (type == PNG_EQUATION_BASE_E && nparams != 3) || (type == PNG_EQUATION_ARBITRARY && nparams != 3) || @@ -1729,6 +2006,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_ptr->chunkdata = NULL; return; } + else if (type >= PNG_EQUATION_LAST) { png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); @@ -1738,15 +2016,17 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) /* Empty loop to move past the units string. */ ; png_debug(3, "Allocating pCAL parameters array"); + params = (png_charpp)png_malloc_warn(png_ptr, - (png_size_t)(nparams * png_sizeof(png_charp))); + (png_size_t)(nparams * png_sizeof(png_charp))); + if (params == NULL) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "No memory for pCAL params"); - return; - } + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_warning(png_ptr, "No memory for pCAL params"); + return; + } /* Get pointers to the start of each parameter string. */ for (i = 0; i < (int)nparams; i++) @@ -1754,6 +2034,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) buf++; /* Skip the null string terminator from previous parameter. */ png_debug1(3, "Reading pCAL parameter %d", i); + for (params[i] = buf; buf <= endptr && *buf != 0x00; buf++) /* Empty loop to move past each parameter string */ ; @@ -1782,27 +2063,21 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) void /* PRIVATE */ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { - png_charp ep; -#ifdef PNG_FLOATING_POINT_SUPPORTED - double width, height; - png_charp vp; -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - png_charp swidth, sheight; -#endif -#endif - png_size_t slength; + png_size_t slength, i; + int state; png_debug(1, "in png_handle_sCAL"); if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Missing IHDR before sCAL"); + else if (png_ptr->mode & PNG_HAVE_IDAT) { png_warning(png_ptr, "Invalid sCAL after IDAT"); png_crc_finish(png_ptr, length); return; } + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) { png_warning(png_ptr, "Duplicate sCAL chunk"); @@ -1810,17 +2085,29 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return; } - png_debug1(2, "Allocating and reading sCAL chunk data (%lu bytes)", + /* Need unit type, width, \0, height: minimum 4 bytes */ + else if (length < 4) + { + png_warning(png_ptr, "sCAL chunk too short"); + png_crc_finish(png_ptr, length); + return; + } + + png_debug1(2, "Allocating and reading sCAL chunk data (%u bytes)", length + 1); + png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + if (png_ptr->chunkdata == NULL) { png_warning(png_ptr, "Out of memory while processing sCAL chunk"); png_crc_finish(png_ptr, length); return; } + slength = (png_size_t)length; png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ if (png_crc_finish(png_ptr, 0)) { @@ -1829,103 +2116,50 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) return; } - png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ - - ep = png_ptr->chunkdata + 1; /* Skip unit byte */ - -#ifdef PNG_FLOATING_POINT_SUPPORTED - width = png_strtod(png_ptr, ep, &vp); - if (*vp) + /* Validate the unit. */ + if (png_ptr->chunkdata[0] != 1 && png_ptr->chunkdata[0] != 2) { - png_warning(png_ptr, "malformed width string in sCAL chunk"); + png_warning(png_ptr, "Invalid sCAL ignored: invalid unit"); png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; return; } -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - swidth = (png_charp)png_malloc_warn(png_ptr, png_strlen(ep) + 1); - if (swidth == NULL) - { - png_warning(png_ptr, "Out of memory while processing sCAL chunk width"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - png_memcpy(swidth, ep, png_strlen(ep)); -#endif -#endif - for (ep = png_ptr->chunkdata; *ep; ep++) - /* Empty loop */ ; - ep++; + /* Validate the ASCII numbers, need two ASCII numbers separated by + * a '\0' and they need to fit exactly in the chunk data. + */ + i = 1; + state = 0; - if (png_ptr->chunkdata + slength < ep) - { - png_warning(png_ptr, "Truncated sCAL chunk"); -#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) - png_free(png_ptr, swidth); -#endif - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || + i >= slength || png_ptr->chunkdata[i++] != 0) + png_warning(png_ptr, "Invalid sCAL chunk ignored: bad width format"); -#ifdef PNG_FLOATING_POINT_SUPPORTED - height = png_strtod(png_ptr, ep, &vp); - if (*vp) - { - png_warning(png_ptr, "malformed height string in sCAL chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - sheight = (png_charp)png_malloc_warn(png_ptr, png_strlen(ep) + 1); - if (sheight == NULL) - { - png_warning(png_ptr, "Out of memory while processing sCAL chunk height"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_free(png_ptr, swidth); - return; - } - png_memcpy(sheight, ep, png_strlen(ep)); -#endif -#endif + else if (!PNG_FP_IS_POSITIVE(state)) + png_warning(png_ptr, "Invalid sCAL chunk ignored: non-positive width"); - if (png_ptr->chunkdata + slength < ep -#ifdef PNG_FLOATING_POINT_SUPPORTED - || width <= 0. || height <= 0. -#endif - ) + else { - png_warning(png_ptr, "Invalid sCAL data"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; -#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) - png_free(png_ptr, swidth); - png_free(png_ptr, sheight); -#endif - return; - } + png_size_t heighti = i; + state = 0; + if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || + i != slength) + png_warning(png_ptr, "Invalid sCAL chunk ignored: bad height format"); -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_sCAL(png_ptr, info_ptr, png_ptr->chunkdata[0], width, height); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0], swidth, sheight); -#endif -#endif + else if (!PNG_FP_IS_POSITIVE(state)) + png_warning(png_ptr, + "Invalid sCAL chunk ignored: non-positive height"); + else + /* This is the (only) success case. */ + png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0], + png_ptr->chunkdata+1, png_ptr->chunkdata+heighti); + } + + /* Clean up - just free the temporarily allocated buffer. */ png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; -#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) - png_free(png_ptr, swidth); - png_free(png_ptr, sheight); -#endif } #endif @@ -1940,6 +2174,7 @@ png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (!(png_ptr->mode & PNG_HAVE_IHDR)) png_error(png_ptr, "Out of place tIME chunk"); + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)) { png_warning(png_ptr, "Duplicate tIME chunk"); @@ -1958,6 +2193,7 @@ png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } png_crc_read(png_ptr, buf, 7); + if (png_crc_finish(png_ptr, 0)) return; @@ -1994,6 +2230,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_crc_finish(png_ptr, length); return; } + if (--png_ptr->user_chunk_cache_max == 1) { png_warning(png_ptr, "No space in chunk cache for tEXt"); @@ -2021,11 +2258,13 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + if (png_ptr->chunkdata == NULL) { png_warning(png_ptr, "No memory to process text chunk"); return; } + slength = (png_size_t)length; png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); @@ -2047,21 +2286,21 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) text++; text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); + png_sizeof(png_text)); + if (text_ptr == NULL) { - png_warning(png_ptr, "Not enough memory to process text chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; + png_warning(png_ptr, "Not enough memory to process text chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; } + text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; text_ptr->key = key; -#ifdef PNG_iTXt_SUPPORTED text_ptr->lang = NULL; text_ptr->lang_key = NULL; text_ptr->itxt_length = 0; -#endif text_ptr->text = text; text_ptr->text_length = png_strlen(text); @@ -2070,8 +2309,9 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; png_free(png_ptr, text_ptr); + if (ret) - png_warning(png_ptr, "Insufficient memory to process text chunk"); + png_warning(png_ptr, "Insufficient memory to process text chunk"); } #endif @@ -2096,6 +2336,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_crc_finish(png_ptr, length); return; } + if (--png_ptr->user_chunk_cache_max == 1) { png_warning(png_ptr, "No space in chunk cache for zTXt"); @@ -2113,24 +2354,28 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_MAX_MALLOC_64K /* We will no doubt have problems with chunks even half this size, but - there is no hard and fast rule to tell us where to stop. */ + * there is no hard and fast rule to tell us where to stop. + */ if (length > (png_uint_32)65535L) { - png_warning(png_ptr, "zTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; + png_warning(png_ptr, "zTXt chunk too large to fit in memory"); + png_crc_finish(png_ptr, length); + return; } #endif png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + if (png_ptr->chunkdata == NULL) { - png_warning(png_ptr, "Out of memory processing zTXt chunk"); - return; + png_warning(png_ptr, "Out of memory processing zTXt chunk"); + return; } + slength = (png_size_t)length; png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + if (png_crc_finish(png_ptr, 0)) { png_free(png_ptr, png_ptr->chunkdata); @@ -2151,37 +2396,41 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_ptr->chunkdata = NULL; return; } + else { comp_type = *(++text); + if (comp_type != PNG_TEXT_COMPRESSION_zTXt) { png_warning(png_ptr, "Unknown compression type in zTXt chunk"); comp_type = PNG_TEXT_COMPRESSION_zTXt; } + text++; /* Skip the compression_method byte */ } + prefix_len = text - png_ptr->chunkdata; png_decompress_chunk(png_ptr, comp_type, - (png_size_t)length, prefix_len, &data_len); + (png_size_t)length, prefix_len, &data_len); text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); + png_sizeof(png_text)); + if (text_ptr == NULL) { - png_warning(png_ptr, "Not enough memory to process zTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; + png_warning(png_ptr, "Not enough memory to process zTXt chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; } + text_ptr->compression = comp_type; text_ptr->key = png_ptr->chunkdata; -#ifdef PNG_iTXt_SUPPORTED text_ptr->lang = NULL; text_ptr->lang_key = NULL; text_ptr->itxt_length = 0; -#endif text_ptr->text = png_ptr->chunkdata + prefix_len; text_ptr->text_length = data_len; @@ -2190,8 +2439,9 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_free(png_ptr, text_ptr); png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; + if (ret) - png_error(png_ptr, "Insufficient memory to store zTXt chunk"); + png_error(png_ptr, "Insufficient memory to store zTXt chunk"); } #endif @@ -2217,6 +2467,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_crc_finish(png_ptr, length); return; } + if (--png_ptr->user_chunk_cache_max == 1) { png_warning(png_ptr, "No space in chunk cache for iTXt"); @@ -2234,24 +2485,28 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_MAX_MALLOC_64K /* We will no doubt have problems with chunks even half this size, but - there is no hard and fast rule to tell us where to stop. */ + * there is no hard and fast rule to tell us where to stop. + */ if (length > (png_uint_32)65535L) { - png_warning(png_ptr, "iTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; + png_warning(png_ptr, "iTXt chunk too large to fit in memory"); + png_crc_finish(png_ptr, length); + return; } #endif png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + if (png_ptr->chunkdata == NULL) { - png_warning(png_ptr, "No memory to process iTXt chunk"); - return; + png_warning(png_ptr, "No memory to process iTXt chunk"); + return; } + slength = (png_size_t)length; png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + if (png_crc_finish(png_ptr, 0)) { png_free(png_ptr, png_ptr->chunkdata); @@ -2263,6 +2518,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) for (lang = png_ptr->chunkdata; *lang; lang++) /* Empty loop */ ; + lang++; /* Skip NUL separator */ /* iTXt must have a language tag (possibly empty), two compression bytes, @@ -2277,14 +2533,16 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_ptr->chunkdata = NULL; return; } + else { - comp_flag = *lang++; - comp_type = *lang++; + comp_flag = *lang++; + comp_type = *lang++; } for (lang_key = lang; *lang_key; lang_key++) /* Empty loop */ ; + lang_key++; /* Skip NUL separator */ if (lang_key >= png_ptr->chunkdata + slength) @@ -2297,7 +2555,9 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) for (text = lang_key; *text; text++) /* Empty loop */ ; + text++; /* Skip NUL separator */ + if (text >= png_ptr->chunkdata + slength) { png_warning(png_ptr, "Malformed iTXt chunk"); @@ -2309,20 +2569,25 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) prefix_len = text - png_ptr->chunkdata; key=png_ptr->chunkdata; + if (comp_flag) - png_decompress_chunk(png_ptr, comp_type, - (size_t)length, prefix_len, &data_len); + png_decompress_chunk(png_ptr, comp_type, + (size_t)length, prefix_len, &data_len); + else - data_len = png_strlen(png_ptr->chunkdata + prefix_len); + data_len = png_strlen(png_ptr->chunkdata + prefix_len); + text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); + png_sizeof(png_text)); + if (text_ptr == NULL) { - png_warning(png_ptr, "Not enough memory to process iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; + png_warning(png_ptr, "Not enough memory to process iTXt chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; } + text_ptr->compression = (int)comp_flag + 1; text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key); text_ptr->lang = png_ptr->chunkdata + (lang - key); @@ -2336,16 +2601,18 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_free(png_ptr, text_ptr); png_free(png_ptr, png_ptr->chunkdata); png_ptr->chunkdata = NULL; + if (ret) - png_error(png_ptr, "Insufficient memory to store iTXt chunk"); + png_error(png_ptr, "Insufficient memory to store iTXt chunk"); } #endif /* This function is called when we haven't found a handler for a - chunk. If there isn't a problem with the chunk itself (ie bad - chunk name, CRC, or a critical chunk), the chunk is silently ignored - -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which - case it will be saved away to be written out later. */ + * chunk. If there isn't a problem with the chunk itself (ie bad + * chunk name, CRC, or a critical chunk), the chunk is silently ignored + * -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which + * case it will be saved away to be written out later. + */ void /* PRIVATE */ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { @@ -2361,6 +2628,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_crc_finish(png_ptr, length); return; } + if (--png_ptr->user_chunk_cache_max == 1) { png_warning(png_ptr, "No space in chunk cache for unknown chunk"); @@ -2372,22 +2640,21 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (png_ptr->mode & PNG_HAVE_IDAT) { - PNG_IDAT; - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* Not an IDAT */ + if (png_ptr->chunk_name != png_IDAT) png_ptr->mode |= PNG_AFTER_IDAT; } - if (!(png_ptr->chunk_name[0] & 0x20)) + if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) { #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != - PNG_HANDLE_CHUNK_ALWAYS + if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) != + PNG_HANDLE_CHUNK_ALWAYS #ifdef PNG_READ_USER_CHUNKS_SUPPORTED - && png_ptr->read_user_chunk_fn == NULL + && png_ptr->read_user_chunk_fn == NULL #endif - ) + ) #endif - png_chunk_error(png_ptr, "unknown critical chunk"); + png_chunk_error(png_ptr, "unknown critical chunk"); } #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED @@ -2395,56 +2662,70 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_USER_CHUNKS_SUPPORTED || (png_ptr->read_user_chunk_fn != NULL) #endif - ) + ) { #ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "unknown chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } + if (length > 65535) + { + png_warning(png_ptr, "unknown chunk too large to fit in memory"); + skip = length - 65535; + length = 65535; + } #endif - png_memcpy((png_charp)png_ptr->unknown_chunk.name, - (png_charp)png_ptr->chunk_name, - png_sizeof(png_ptr->unknown_chunk.name)); - png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1] - = '\0'; - png_ptr->unknown_chunk.size = (png_size_t)length; - if (length == 0) + + /* TODO: this code is very close to the unknown handling in pngpread.c, + * maybe it can be put into a common utility routine? + * png_struct::unknown_chunk is just used as a temporary variable, along + * with the data into which the chunk is read. These can be eliminated. + */ + PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name); + png_ptr->unknown_chunk.size = (png_size_t)length; + + if (length == 0) png_ptr->unknown_chunk.data = NULL; - else - { + + else + { png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length); - png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length); - } + png_crc_read(png_ptr, png_ptr->unknown_chunk.data, length); + } + #ifdef PNG_READ_USER_CHUNKS_SUPPORTED - if (png_ptr->read_user_chunk_fn != NULL) - { - /* Callback to user unknown chunk handler */ - int ret; - ret = (*(png_ptr->read_user_chunk_fn)) - (png_ptr, &png_ptr->unknown_chunk); - if (ret < 0) - png_chunk_error(png_ptr, "error in user chunk"); - if (ret == 0) - { - if (!(png_ptr->chunk_name[0] & 0x20)) + if (png_ptr->read_user_chunk_fn != NULL) + { + /* Callback to user unknown chunk handler */ + int ret; + + ret = (*(png_ptr->read_user_chunk_fn)) + (png_ptr, &png_ptr->unknown_chunk); + + if (ret < 0) + png_chunk_error(png_ptr, "error in user chunk"); + + if (ret == 0) + { + if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) + { #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != - PNG_HANDLE_CHUNK_ALWAYS) + if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) != + PNG_HANDLE_CHUNK_ALWAYS) #endif - png_chunk_error(png_ptr, "unknown critical chunk"); - png_set_unknown_chunks(png_ptr, info_ptr, - &png_ptr->unknown_chunk, 1); - } - } - else + png_chunk_error(png_ptr, "unknown critical chunk"); + } + + png_set_unknown_chunks(png_ptr, info_ptr, + &png_ptr->unknown_chunk, 1); + } + } + + else #endif - png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); - png_free(png_ptr, png_ptr->unknown_chunk.data); - png_ptr->unknown_chunk.data = NULL; + png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); + + png_free(png_ptr, png_ptr->unknown_chunk.data); + png_ptr->unknown_chunk.data = NULL; } + else #endif skip = length; @@ -2452,256 +2733,537 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_crc_finish(png_ptr, skip); #ifndef PNG_READ_USER_CHUNKS_SUPPORTED - info_ptr = info_ptr; /* Quiet compiler warnings about unused info_ptr */ + PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ #endif } /* This function is called to verify that a chunk name is valid. - This function can't have the "critical chunk check" incorporated - into it, since in the future we will need to be able to call user - functions to handle unknown critical chunks after we check that - the chunk name itself is valid. */ + * This function can't have the "critical chunk check" incorporated + * into it, since in the future we will need to be able to call user + * functions to handle unknown critical chunks after we check that + * the chunk name itself is valid. + */ -#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97)) +/* Bit hacking: the test for an invalid byte in the 4 byte chunk name is: + * + * ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97)) + */ void /* PRIVATE */ -png_check_chunk_name(png_structp png_ptr, png_bytep chunk_name) +png_check_chunk_name(png_structp png_ptr, png_uint_32 chunk_name) { + int i; + png_debug(1, "in png_check_chunk_name"); - if (isnonalpha(chunk_name[0]) || isnonalpha(chunk_name[1]) || - isnonalpha(chunk_name[2]) || isnonalpha(chunk_name[3])) + + for (i=1; i<=4; ++i) { - png_chunk_error(png_ptr, "invalid chunk type"); + int c = chunk_name & 0xff; + + if (c < 65 || c > 122 || (c > 90 && c < 97)) + png_chunk_error(png_ptr, "invalid chunk type"); + + chunk_name >>= 8; } } /* Combines the row recently read in with the existing pixels in the - row. This routine takes care of alpha and transparency if requested. - This routine also handles the two methods of progressive display - of interlaced images, depending on the mask value. - The mask value describes which pixels are to be combined with - the row. The pattern always repeats every 8 pixels, so just 8 - bits are needed. A one indicates the pixel is to be combined, - a zero indicates the pixel is to be skipped. This is in addition - to any alpha or transparency value associated with the pixel. If - you want all pixels to be combined, pass 0xff (255) in mask. */ + * row. This routine takes care of alpha and transparency if requested. + * This routine also handles the two methods of progressive display + * of interlaced images, depending on the mask value. + * The mask value describes which pixels are to be combined with + * the row. The pattern always repeats every 8 pixels, so just 8 + * bits are needed. A one indicates the pixel is to be combined, + * a zero indicates the pixel is to be skipped. This is in addition + * to any alpha or transparency value associated with the pixel. If + * you want all pixels to be combined, pass 0xff (255) in mask. + */ void /* PRIVATE */ -png_combine_row(png_structp png_ptr, png_bytep row, int mask) +png_combine_row(png_structp png_ptr, png_bytep dp, int display) { + unsigned int pixel_depth = png_ptr->transformed_pixel_depth; + png_const_bytep sp = png_ptr->row_buf + 1; + png_uint_32 row_width = png_ptr->width; + unsigned int pass = png_ptr->pass; + png_bytep end_ptr = 0; + png_byte end_byte = 0; + unsigned int end_mask; + png_debug(1, "in png_combine_row"); - if (mask == 0xff) - { - png_memcpy(row, png_ptr->row_buf + 1, - PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width)); - } - else + + /* Added in 1.5.6: it should not be possible to enter this routine until at + * least one row has been read from the PNG data and transformed. + */ + if (pixel_depth == 0) + png_error(png_ptr, "internal row logic error"); + + /* Added in 1.5.4: the pixel depth should match the information returned by + * any call to png_read_update_info at this point. Do not continue if we got + * this wrong. + */ + if (png_ptr->info_rowbytes != 0 && png_ptr->info_rowbytes != + PNG_ROWBYTES(pixel_depth, row_width)) + png_error(png_ptr, "internal row size calculation error"); + + /* Don't expect this to ever happen: */ + if (row_width == 0) + png_error(png_ptr, "internal row width error"); + + /* Preserve the last byte in cases where only part of it will be overwritten, + * the multiply below may overflow, we don't care because ANSI-C guarantees + * we get the low bits. + */ + end_mask = (pixel_depth * row_width) & 7; + if (end_mask != 0) + { + /* end_ptr == NULL is a flag to say do nothing */ + end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1; + end_byte = *end_ptr; +# ifdef PNG_READ_PACKSWAP_SUPPORTED + if (png_ptr->transformations & PNG_PACKSWAP) /* little-endian byte */ + end_mask = 0xff << end_mask; + + else /* big-endian byte */ +# endif + end_mask = 0xff >> end_mask; + /* end_mask is now the bits to *keep* from the destination row */ + } + + /* For non-interlaced images this reduces to a png_memcpy(). A png_memcpy() + * will also happen if interlacing isn't supported or if the application + * does not call png_set_interlace_handling(). In the latter cases the + * caller just gets a sequence of the unexpanded rows from each interlace + * pass. + */ +#ifdef PNG_READ_INTERLACING_SUPPORTED + if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE) && + pass < 6 && (display == 0 || + /* The following copies everything for 'display' on passes 0, 2 and 4. */ + (display == 1 && (pass & 1) != 0))) { - switch (png_ptr->row_info.pixel_depth) - { - case 1: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_inc, s_start, s_end; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; + /* Narrow images may have no bits in a pass; the caller should handle + * this, but this test is cheap: + */ + if (row_width <= PNG_PASS_START_COL(pass)) + return; -#ifdef PNG_READ_PACKSWAP_SUPPORTED + if (pixel_depth < 8) + { + /* For pixel depths up to 4-bpp the 8-pixel mask can be expanded to fit + * into 32 bits, then a single loop over the bytes using the four byte + * values in the 32-bit mask can be used. For the 'display' option the + * expanded mask may also not require any masking within a byte. To + * make this work the PACKSWAP option must be taken into account - it + * simply requires the pixels to be reversed in each byte. + * + * The 'regular' case requires a mask for each of the first 6 passes, + * the 'display' case does a copy for the even passes in the range + * 0..6. This has already been handled in the tst above. + * + * The masks are arranged as four bytes with the first byte to use in + * the lowest bits (little-endian) regardless of the order (PACKSWAP or + * not) of the pixels in each byte. + * + * NOTE: the whole of this logic depends on the caller of this function + * only calling it on rows appropriate to the pass. This function only + * understands the 'x' logic, the 'y' logic is handled by the caller. + * + * The following defines allow generation of compile time constant bit + * masks for each pixel depth and each possibility of swapped or not + * swapped bytes. Pass 'p' is in the range 0..6; 'x', a pixel index, + * is in the range 0..7; and the result is 1 if the pixel is to be + * copied in the pass, 0 if not. 'S' is for the sparkle method, 'B' + * for the block method. + * + * With some compilers a compile time expression of the general form: + * + * (shift >= 32) ? (a >> (shift-32)) : (b >> shift) + * + * Produces warnings with values of 'shift' in the range 33 to 63 + * because the right hand side of the ?: expression is evaluated by + * the compiler even though it isn't used. Microsoft Visual C (various + * versions) and the Intel C compiler are known to do this. To avoid + * this the following macros are used in 1.5.6. This is a temporary + * solution to avoid destablizing the code during the release process. + */ +# if PNG_USE_COMPILE_TIME_MASKS +# define PNG_LSR(x,s) ((x)>>((s) & 0x1f)) +# define PNG_LSL(x,s) ((x)<<((s) & 0x1f)) +# else +# define PNG_LSR(x,s) ((x)>>(s)) +# define PNG_LSL(x,s) ((x)<<(s)) +# endif +# define S_COPY(p,x) (((p)<4 ? PNG_LSR(0x80088822,(3-(p))*8+(7-(x))) :\ + PNG_LSR(0xaa55ff00,(7-(p))*8+(7-(x)))) & 1) +# define B_COPY(p,x) (((p)<4 ? PNG_LSR(0xff0fff33,(3-(p))*8+(7-(x))) :\ + PNG_LSR(0xff55ff00,(7-(p))*8+(7-(x)))) & 1) + + /* Return a mask for pass 'p' pixel 'x' at depth 'd'. The mask is + * little endian - the first pixel is at bit 0 - however the extra + * parameter 's' can be set to cause the mask position to be swapped + * within each byte, to match the PNG format. This is done by XOR of + * the shift with 7, 6 or 4 for bit depths 1, 2 and 4. + */ +# define PIXEL_MASK(p,x,d,s) \ + (PNG_LSL(((PNG_LSL(1U,(d)))-1),(((x)*(d))^((s)?8-(d):0)))) + + /* Hence generate the appropriate 'block' or 'sparkle' pixel copy mask. + */ +# define S_MASKx(p,x,d,s) (S_COPY(p,x)?PIXEL_MASK(p,x,d,s):0) +# define B_MASKx(p,x,d,s) (B_COPY(p,x)?PIXEL_MASK(p,x,d,s):0) + + /* Combine 8 of these to get the full mask. For the 1-bpp and 2-bpp + * cases the result needs replicating, for the 4-bpp case the above + * generates a full 32 bits. + */ +# define MASK_EXPAND(m,d) ((m)*((d)==1?0x01010101:((d)==2?0x00010001:1))) + +# define S_MASK(p,d,s) MASK_EXPAND(S_MASKx(p,0,d,s) + S_MASKx(p,1,d,s) +\ + S_MASKx(p,2,d,s) + S_MASKx(p,3,d,s) + S_MASKx(p,4,d,s) +\ + S_MASKx(p,5,d,s) + S_MASKx(p,6,d,s) + S_MASKx(p,7,d,s), d) + +# define B_MASK(p,d,s) MASK_EXPAND(B_MASKx(p,0,d,s) + B_MASKx(p,1,d,s) +\ + B_MASKx(p,2,d,s) + B_MASKx(p,3,d,s) + B_MASKx(p,4,d,s) +\ + B_MASKx(p,5,d,s) + B_MASKx(p,6,d,s) + B_MASKx(p,7,d,s), d) + +#if PNG_USE_COMPILE_TIME_MASKS + /* Utility macros to construct all the masks for a depth/swap + * combination. The 's' parameter says whether the format is PNG + * (big endian bytes) or not. Only the three odd numbered passes are + * required for the display/block algorithm. + */ +# define S_MASKS(d,s) { S_MASK(0,d,s), S_MASK(1,d,s), S_MASK(2,d,s),\ + S_MASK(3,d,s), S_MASK(4,d,s), S_MASK(5,d,s) } + +# define B_MASKS(d,s) { B_MASK(1,d,s), S_MASK(3,d,s), S_MASK(5,d,s) } + +# define DEPTH_INDEX(d) ((d)==1?0:((d)==2?1:2)) + + /* Hence the pre-compiled masks indexed by PACKSWAP (or not), depth and + * then pass: + */ + static PNG_CONST png_uint_32 row_mask[2/*PACKSWAP*/][3/*depth*/][6] = { + /* Little-endian byte masks for PACKSWAP */ + { S_MASKS(1,0), S_MASKS(2,0), S_MASKS(4,0) }, + /* Normal (big-endian byte) masks - PNG format */ + { S_MASKS(1,1), S_MASKS(2,1), S_MASKS(4,1) } + }; + + /* display_mask has only three entries for the odd passes, so index by + * pass>>1. + */ + static PNG_CONST png_uint_32 display_mask[2][3][3] = { + /* Little-endian byte masks for PACKSWAP */ + { B_MASKS(1,0), B_MASKS(2,0), B_MASKS(4,0) }, + /* Normal (big-endian byte) masks - PNG format */ + { B_MASKS(1,1), B_MASKS(2,1), B_MASKS(4,1) } + }; + +# define MASK(pass,depth,display,png)\ + ((display)?display_mask[png][DEPTH_INDEX(depth)][pass>>1]:\ + row_mask[png][DEPTH_INDEX(depth)][pass]) + +#else /* !PNG_USE_COMPILE_TIME_MASKS */ + /* This is the runtime alternative: it seems unlikely that this will + * ever be either smaller or faster than the compile time approach. + */ +# define MASK(pass,depth,display,png)\ + ((display)?B_MASK(pass,depth,png):S_MASK(pass,depth,png)) +#endif /* !PNG_USE_COMPILE_TIME_MASKS */ + + /* Use the appropriate mask to copy the required bits. In some cases + * the byte mask will be 0 or 0xff, optimize these cases. row_width is + * the number of pixels, but the code copies bytes, so it is necessary + * to special case the end. + */ + png_uint_32 pixels_per_byte = 8 / pixel_depth; + png_uint_32 mask; + +# ifdef PNG_READ_PACKSWAP_SUPPORTED if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 7; - s_inc = 1; - } + mask = MASK(pass, pixel_depth, display, 0); + else -#endif +# endif + mask = MASK(pass, pixel_depth, display, 1); + + for (;;) + { + png_uint_32 m; + + /* It doesn't matter in the following if png_uint_32 has more than + * 32 bits because the high bits always match those in m<<24; it is, + * however, essential to use OR here, not +, because of this. + */ + m = mask; + mask = (m >> 8) | (m << 24); /* rotate right to good compilers */ + m &= 0xff; + + if (m != 0) /* something to copy */ { - s_start = 7; - s_end = 0; - s_inc = -1; + if (m != 0xff) + *dp = (png_byte)((*dp & ~m) | (*sp & m)); + else + *dp = *sp; } - shift = s_start; + /* NOTE: this may overwrite the last byte with garbage if the image + * is not an exact number of bytes wide; libpng has always done + * this. + */ + if (row_width <= pixels_per_byte) + break; /* May need to restore part of the last byte */ - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - int value; + row_width -= pixels_per_byte; + ++dp; + ++sp; + } + } - value = (*sp >> shift) & 0x01; - *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } + else /* pixel_depth >= 8 */ + { + unsigned int bytes_to_copy, bytes_to_jump; - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; + /* Validate the depth - it must be a multiple of 8 */ + if (pixel_depth & 7) + png_error(png_ptr, "invalid user transform pixel depth"); - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - case 2: + pixel_depth >>= 3; /* now in bytes */ + row_width *= pixel_depth; + + /* Regardless of pass number the Adam 7 interlace always results in a + * fixed number of pixels to copy then to skip. There may be a + * different number of pixels to skip at the start though. + */ { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_start, s_end, s_inc; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - int value; + unsigned int offset = PNG_PASS_START_COL(pass) * pixel_depth; -#ifdef PNG_READ_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 6; - s_inc = 2; - } - else -#endif - { - s_start = 6; - s_end = 0; - s_inc = -2; - } + row_width -= offset; + dp += offset; + sp += offset; + } - shift = s_start; + /* Work out the bytes to copy. */ + if (display) + { + /* When doing the 'block' algorithm the pixel in the pass gets + * replicated to adjacent pixels. This is why the even (0,2,4,6) + * passes are skipped above - the entire expanded row is copied. + */ + bytes_to_copy = (1<<((6-pass)>>1)) * pixel_depth; - for (i = 0; i < row_width; i++) - { - if (m & mask) + /* But don't allow this number to exceed the actual row width. */ + if (bytes_to_copy > row_width) + bytes_to_copy = row_width; + } + + else /* normal row; Adam7 only ever gives us one pixel to copy. */ + bytes_to_copy = pixel_depth; + + /* In Adam7 there is a constant offset between where the pixels go. */ + bytes_to_jump = PNG_PASS_COL_OFFSET(pass) * pixel_depth; + + /* And simply copy these bytes. Some optimization is possible here, + * depending on the value of 'bytes_to_copy'. Special case the low + * byte counts, which we know to be frequent. + * + * Notice that these cases all 'return' rather than 'break' - this + * avoids an unnecessary test on whether to restore the last byte + * below. + */ + switch (bytes_to_copy) + { + case 1: + for (;;) { - value = (*sp >> shift) & 0x03; - *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); + *dp = *sp; + + if (row_width <= bytes_to_jump) + return; + + dp += bytes_to_jump; + sp += bytes_to_jump; + row_width -= bytes_to_jump; } - if (shift == s_end) + case 2: + /* There is a possibility of a partial copy at the end here; this + * slows the code down somewhat. + */ + do { - shift = s_start; - sp++; - dp++; + dp[0] = sp[0], dp[1] = sp[1]; + + if (row_width <= bytes_to_jump) + return; + + sp += bytes_to_jump; + dp += bytes_to_jump; + row_width -= bytes_to_jump; } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - case 4: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_start, s_end, s_inc; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - int value; + while (row_width > 1); -#ifdef PNG_READ_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 4; - s_inc = 4; - } - else -#endif - { - s_start = 4; - s_end = 0; - s_inc = -4; - } - shift = s_start; + /* And there can only be one byte left at this point: */ + *dp = *sp; + return; - for (i = 0; i < row_width; i++) - { - if (m & mask) + case 3: + /* This can only be the RGB case, so each copy is exactly one + * pixel and it is not necessary to check for a partial copy. + */ + for(;;) { - value = (*sp >> shift) & 0xf; - *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); + dp[0] = sp[0], dp[1] = sp[1], dp[2] = sp[2]; + + if (row_width <= bytes_to_jump) + return; + + sp += bytes_to_jump; + dp += bytes_to_jump; + row_width -= bytes_to_jump; } - if (shift == s_end) + default: +#if PNG_ALIGN_TYPE != PNG_ALIGN_NONE + /* Check for double byte alignment and, if possible, use a + * 16-bit copy. Don't attempt this for narrow images - ones that + * are less than an interlace panel wide. Don't attempt it for + * wide bytes-to-copy either - use the png_memcpy there. + */ + if (bytes_to_copy < 16 /*else use png_memcpy*/ && + png_isaligned(dp, png_uint_16) && + png_isaligned(sp, png_uint_16) && + bytes_to_copy % sizeof (png_uint_16) == 0 && + bytes_to_jump % sizeof (png_uint_16) == 0) { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - default: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - png_size_t pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - png_byte m = 0x80; + /* Everything is aligned for png_uint_16 copies, but try for + * png_uint_32 first. + */ + if (png_isaligned(dp, png_uint_32) && + png_isaligned(sp, png_uint_32) && + bytes_to_copy % sizeof (png_uint_32) == 0 && + bytes_to_jump % sizeof (png_uint_32) == 0) + { + png_uint_32p dp32 = (png_uint_32p)dp; + png_const_uint_32p sp32 = (png_const_uint_32p)sp; + unsigned int skip = (bytes_to_jump-bytes_to_copy) / + sizeof (png_uint_32); + + do + { + size_t c = bytes_to_copy; + do + { + *dp32++ = *sp32++; + c -= sizeof (png_uint_32); + } + while (c > 0); + + if (row_width <= bytes_to_jump) + return; + + dp32 += skip; + sp32 += skip; + row_width -= bytes_to_jump; + } + while (bytes_to_copy <= row_width); + + /* Get to here when the row_width truncates the final copy. + * There will be 1-3 bytes left to copy, so don't try the + * 16-bit loop below. + */ + dp = (png_bytep)dp32; + sp = (png_const_bytep)sp32; + do + *dp++ = *sp++; + while (--row_width > 0); + return; + } + /* Else do it in 16-bit quantities, but only if the size is + * not too large. + */ + else + { + png_uint_16p dp16 = (png_uint_16p)dp; + png_const_uint_16p sp16 = (png_const_uint_16p)sp; + unsigned int skip = (bytes_to_jump-bytes_to_copy) / + sizeof (png_uint_16); + + do + { + size_t c = bytes_to_copy; + do + { + *dp16++ = *sp16++; + c -= sizeof (png_uint_16); + } + while (c > 0); + + if (row_width <= bytes_to_jump) + return; + + dp16 += skip; + sp16 += skip; + row_width -= bytes_to_jump; + } + while (bytes_to_copy <= row_width); + + /* End of row - 1 byte left, bytes_to_copy > row_width: */ + dp = (png_bytep)dp16; + sp = (png_const_bytep)sp16; + do + *dp++ = *sp++; + while (--row_width > 0); + return; + } + } +#endif /* PNG_ALIGN_ code */ - for (i = 0; i < row_width; i++) - { - if (m & mask) + /* The true default - use a png_memcpy: */ + for (;;) { - png_memcpy(dp, sp, pixel_bytes); - } + png_memcpy(dp, sp, bytes_to_copy); - sp += pixel_bytes; - dp += pixel_bytes; + if (row_width <= bytes_to_jump) + return; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; + sp += bytes_to_jump; + dp += bytes_to_jump; + row_width -= bytes_to_jump; + if (bytes_to_copy > row_width) + bytes_to_copy = row_width; + } } - } + + /* NOT REACHED*/ + } /* pixel_depth >= 8 */ + + /* Here if pixel_depth < 8 to check 'end_ptr' below. */ } + else +#endif + + /* If here then the switch above wasn't used so just png_memcpy the whole row + * from the temporary row buffer (notice that this overwrites the end of the + * destination row if it is a partial byte.) + */ + png_memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width)); + + /* Restore the overwritten bits from the last byte if necessary. */ + if (end_ptr != NULL) + *end_ptr = (png_byte)((end_byte & end_mask) | (*end_ptr & ~end_mask)); } #ifdef PNG_READ_INTERLACING_SUPPORTED -/* OLD pre-1.0.9 interface: -void png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, - png_uint_32 transformations) - */ void /* PRIVATE */ -png_do_read_interlace(png_structp png_ptr) +png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, + png_uint_32 transformations /* Because these may affect the byte layout */) { - png_row_infop row_info = &(png_ptr->row_info); - png_bytep row = png_ptr->row_buf + 1; - int pass = png_ptr->pass; - png_uint_32 transformations = png_ptr->transformations; /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Offset to next interlace block */ - PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; png_debug(1, "in png_do_read_interlace"); if (row != NULL && row_info != NULL) @@ -2732,6 +3294,7 @@ png_do_read_interlace(png_structp png_ptr) s_end = 0; s_inc = -1; } + else #endif { @@ -2749,24 +3312,29 @@ png_do_read_interlace(png_structp png_ptr) { *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); *dp |= (png_byte)(v << dshift); + if (dshift == s_end) { dshift = s_start; dp--; } + else dshift += s_inc; } + if (sshift == s_end) { sshift = s_start; sp--; } + else sshift += s_inc; } break; } + case 2: { png_bytep sp = row + (png_uint_32)((row_info->width - 1) >> 2); @@ -2785,6 +3353,7 @@ png_do_read_interlace(png_structp png_ptr) s_end = 0; s_inc = -2; } + else #endif { @@ -2805,24 +3374,29 @@ png_do_read_interlace(png_structp png_ptr) { *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); *dp |= (png_byte)(v << dshift); + if (dshift == s_end) { dshift = s_start; dp--; } + else dshift += s_inc; } + if (sshift == s_end) { sshift = s_start; sp--; } + else sshift += s_inc; } break; } + case 4: { png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 1); @@ -2841,6 +3415,7 @@ png_do_read_interlace(png_structp png_ptr) s_end = 0; s_inc = -4; } + else #endif { @@ -2853,36 +3428,43 @@ png_do_read_interlace(png_structp png_ptr) for (i = 0; i < row_info->width; i++) { - png_byte v = (png_byte)((*sp >> sshift) & 0xf); + png_byte v = (png_byte)((*sp >> sshift) & 0x0f); int j; for (j = 0; j < jstop; j++) { *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); *dp |= (png_byte)(v << dshift); + if (dshift == s_end) { dshift = s_start; dp--; } + else dshift += s_inc; } + if (sshift == s_end) { sshift = s_start; sp--; } + else sshift += s_inc; } break; } + default: { png_size_t pixel_bytes = (row_info->pixel_depth >> 3); + png_bytep sp = row + (png_size_t)(row_info->width - 1) * pixel_bytes; + png_bytep dp = row + (png_size_t)(final_width - 1) * pixel_bytes; int jstop = png_pass_inc[pass]; @@ -2894,40 +3476,45 @@ png_do_read_interlace(png_structp png_ptr) int j; png_memcpy(v, sp, pixel_bytes); + for (j = 0; j < jstop; j++) { png_memcpy(dp, v, pixel_bytes); dp -= pixel_bytes; } + sp -= pixel_bytes; } break; } } + row_info->width = final_width; row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width); } #ifndef PNG_READ_PACKSWAP_SUPPORTED - transformations = transformations; /* Silence compiler warning */ + PNG_UNUSED(transformations) /* Silence compiler warning */ #endif } #endif /* PNG_READ_INTERLACING_SUPPORTED */ +/* 1.5.6: Changed to just take a png_row_info (not png_ptr) and to ignore bad + * adaptive filter bytes. + */ void /* PRIVATE */ -png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row, - png_bytep prev_row, int filter) +png_read_filter_row(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row, int filter) { - png_debug(1, "in png_read_filter_row"); - png_debug2(2, "row = %lu, filter = %d", png_ptr->row_number, filter); switch (filter) { case PNG_FILTER_VALUE_NONE: break; + case PNG_FILTER_VALUE_SUB: { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; + png_size_t i; + png_size_t istop = row_info->rowbytes; + unsigned int bpp = (row_info->pixel_depth + 7) >> 3; png_bytep rp = row + bpp; png_bytep lp = row; @@ -2940,10 +3527,10 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row, } case PNG_FILTER_VALUE_UP: { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; + png_size_t i; + png_size_t istop = row_info->rowbytes; png_bytep rp = row; - png_bytep pp = prev_row; + png_const_bytep pp = prev_row; for (i = 0; i < istop; i++) { @@ -2954,37 +3541,39 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row, } case PNG_FILTER_VALUE_AVG: { - png_uint_32 i; + png_size_t i; png_bytep rp = row; - png_bytep pp = prev_row; + png_const_bytep pp = prev_row; png_bytep lp = row; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_uint_32 istop = row_info->rowbytes - bpp; + unsigned int bpp = (row_info->pixel_depth + 7) >> 3; + png_size_t istop = row_info->rowbytes - bpp; for (i = 0; i < bpp; i++) { *rp = (png_byte)(((int)(*rp) + - ((int)(*pp++) / 2 )) & 0xff); + ((int)(*pp++) / 2 )) & 0xff); + rp++; } for (i = 0; i < istop; i++) { *rp = (png_byte)(((int)(*rp) + - (int)(*pp++ + *lp++) / 2 ) & 0xff); + (int)(*pp++ + *lp++) / 2 ) & 0xff); + rp++; } break; } case PNG_FILTER_VALUE_PAETH: { - png_uint_32 i; + png_size_t i; png_bytep rp = row; - png_bytep pp = prev_row; + png_const_bytep pp = prev_row; png_bytep lp = row; - png_bytep cp = prev_row; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_uint_32 istop=row_info->rowbytes - bpp; + png_const_bytep cp = prev_row; + unsigned int bpp = (row_info->pixel_depth + 7) >> 3; + png_size_t istop=row_info->rowbytes - bpp; for (i = 0; i < bpp; i++) { @@ -3016,8 +3605,10 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row, /* if (pa <= pb && pa <= pc) p = a; + else if (pb <= pc) p = b; + else p = c; */ @@ -3030,8 +3621,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row, break; } default: - png_warning(png_ptr, "Ignoring bad adaptive filter type"); - *row = 0; + /* NOT REACHED */ break; } } @@ -3044,16 +3634,16 @@ png_read_finish_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ - PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; + static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; /* Offset to next interlace block */ - PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; /* Start of interlace block in the y direction */ - PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; + static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; /* Offset to next interlace block in the y direction */ - PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; + static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; #endif /* PNG_READ_INTERLACING_SUPPORTED */ png_debug(1, "in png_read_finish_row"); @@ -3065,13 +3655,19 @@ png_read_finish_row(png_structp png_ptr) if (png_ptr->interlaced) { png_ptr->row_number = 0; - png_memset(png_ptr->prev_row, 0, - png_ptr->rowbytes + 1); + + /* TO DO: don't do this if prev_row isn't needed (requires + * read-ahead of the next row's filter byte. + */ + png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); + do { png_ptr->pass++; + if (png_ptr->pass >= 7) break; + png_ptr->iwidth = (png_ptr->width + png_pass_inc[png_ptr->pass] - 1 - png_pass_start[png_ptr->pass]) / @@ -3080,15 +3676,15 @@ png_read_finish_row(png_structp png_ptr) if (!(png_ptr->transformations & PNG_INTERLACE)) { png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; - if (!(png_ptr->num_rows)) - continue; + png_pass_yinc[png_ptr->pass] - 1 - + png_pass_ystart[png_ptr->pass]) / + png_pass_yinc[png_ptr->pass]; } + else /* if (png_ptr->transformations & PNG_INTERLACE) */ - break; - } while (png_ptr->iwidth == 0); + break; /* libpng deinterlacing sees every row */ + + } while (png_ptr->num_rows == 0 || png_ptr->iwidth == 0); if (png_ptr->pass < 7) return; @@ -3097,50 +3693,50 @@ png_read_finish_row(png_structp png_ptr) if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) { - PNG_IDAT; char extra; int ret; png_ptr->zstream.next_out = (Byte *)&extra; png_ptr->zstream.avail_out = (uInt)1; + for (;;) { if (!(png_ptr->zstream.avail_in)) { while (!png_ptr->idat_size) { - png_byte chunk_length[4]; - png_crc_finish(png_ptr, 0); - - png_read_data(png_ptr, chunk_length, 4); - png_ptr->idat_size = png_get_uint_31(png_ptr, chunk_length); - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + png_ptr->idat_size = png_read_chunk_header(png_ptr); + if (png_ptr->chunk_name != png_IDAT) png_error(png_ptr, "Not enough image data"); - } + png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; png_ptr->zstream.next_in = png_ptr->zbuf; + if (png_ptr->zbuf_size > png_ptr->idat_size) png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; + png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in); png_ptr->idat_size -= png_ptr->zstream.avail_in; } + ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); + if (ret == Z_STREAM_END) { if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in || - png_ptr->idat_size) + png_ptr->idat_size) png_warning(png_ptr, "Extra compressed data"); + png_ptr->mode |= PNG_AFTER_IDAT; png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; break; } + if (ret != Z_OK) png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression Error"); + "Decompression Error"); if (!(png_ptr->zstream.avail_out)) { @@ -3170,16 +3766,16 @@ png_read_start_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ - PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; + static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; /* Offset to next interlace block */ - PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; /* Start of interlace block in the y direction */ - PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; + static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; /* Offset to next interlace block in the y direction */ - PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; + static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; #endif int max_pixel_depth; @@ -3187,27 +3783,32 @@ png_read_start_row(png_structp png_ptr) png_debug(1, "in png_read_start_row"); png_ptr->zstream.avail_in = 0; +#ifdef PNG_READ_TRANSFORMS_SUPPORTED png_init_read_transformations(png_ptr); +#endif #ifdef PNG_READ_INTERLACING_SUPPORTED if (png_ptr->interlaced) { if (!(png_ptr->transformations & PNG_INTERLACE)) png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - - png_pass_ystart[0]) / png_pass_yinc[0]; + png_pass_ystart[0]) / png_pass_yinc[0]; + else png_ptr->num_rows = png_ptr->height; png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; + png_pass_inc[png_ptr->pass] - 1 - + png_pass_start[png_ptr->pass]) / + png_pass_inc[png_ptr->pass]; } + else #endif /* PNG_READ_INTERLACING_SUPPORTED */ { png_ptr->num_rows = png_ptr->height; png_ptr->iwidth = png_ptr->width; } + max_pixel_depth = png_ptr->pixel_depth; #ifdef PNG_READ_PACK_SUPPORTED @@ -3222,16 +3823,20 @@ png_read_start_row(png_structp png_ptr) { if (png_ptr->num_trans) max_pixel_depth = 32; + else max_pixel_depth = 24; } + else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) { if (max_pixel_depth < 8) max_pixel_depth = 8; + if (png_ptr->num_trans) max_pixel_depth *= 2; } + else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) { if (png_ptr->num_trans) @@ -3243,22 +3848,44 @@ png_read_start_row(png_structp png_ptr) } #endif +#ifdef PNG_READ_EXPAND_16_SUPPORTED + if (png_ptr->transformations & PNG_EXPAND_16) + { +# ifdef PNG_READ_EXPAND_SUPPORTED + /* In fact it is an error if it isn't supported, but checking is + * the safe way. + */ + if (png_ptr->transformations & PNG_EXPAND) + { + if (png_ptr->bit_depth < 16) + max_pixel_depth *= 2; + } + else +# endif + png_ptr->transformations &= ~PNG_EXPAND_16; + } +#endif + #ifdef PNG_READ_FILLER_SUPPORTED if (png_ptr->transformations & (PNG_FILLER)) { if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) max_pixel_depth = 32; + else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) { if (max_pixel_depth <= 8) max_pixel_depth = 16; + else max_pixel_depth = 32; } + else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) { if (max_pixel_depth <= 32) max_pixel_depth = 32; + else max_pixel_depth = 64; } @@ -3270,29 +3897,34 @@ png_read_start_row(png_structp png_ptr) { if ( #ifdef PNG_READ_EXPAND_SUPPORTED - (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) || + (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) || #endif #ifdef PNG_READ_FILLER_SUPPORTED - (png_ptr->transformations & (PNG_FILLER)) || + (png_ptr->transformations & (PNG_FILLER)) || #endif - png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { if (max_pixel_depth <= 16) max_pixel_depth = 32; + else max_pixel_depth = 64; } + else { if (max_pixel_depth <= 8) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + { + if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) max_pixel_depth = 32; - else + + else max_pixel_depth = 24; - } + } + else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) max_pixel_depth = 64; + else max_pixel_depth = 48; } @@ -3302,14 +3934,21 @@ png_read_start_row(png_structp png_ptr) #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) if (png_ptr->transformations & PNG_USER_TRANSFORM) - { - int user_pixel_depth = png_ptr->user_transform_depth* + { + int user_pixel_depth = png_ptr->user_transform_depth * png_ptr->user_transform_channels; - if (user_pixel_depth > max_pixel_depth) - max_pixel_depth=user_pixel_depth; - } + + if (user_pixel_depth > max_pixel_depth) + max_pixel_depth = user_pixel_depth; + } #endif + /* This value is stored in png_struct and double checked in the row read + * code. + */ + png_ptr->maximum_pixel_depth = (png_byte)max_pixel_depth; + png_ptr->transformed_pixel_depth = 0; /* calculated on demand */ + /* Align the width on the next larger 8 pixels. Mainly used * for interlacing */ @@ -3318,7 +3957,8 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) * for safety's sake */ row_bytes = PNG_ROWBYTES(max_pixel_depth, row_bytes) + - 1 + ((max_pixel_depth + 7) >> 3); + 1 + ((max_pixel_depth + 7) >> 3); + #ifdef PNG_MAX_MALLOC_64K if (row_bytes > (png_uint_32)65536L) png_error(png_ptr, "This image requires a row greater than 64KB"); @@ -3327,52 +3967,60 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) if (row_bytes + 48 > png_ptr->old_big_row_buf_size) { png_free(png_ptr, png_ptr->big_row_buf); + png_free(png_ptr, png_ptr->big_prev_row); + if (png_ptr->interlaced) png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr, row_bytes + 48); + else - png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, - row_bytes + 48); - png_ptr->old_big_row_buf_size = row_bytes + 48; + png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes + 48); + + png_ptr->big_prev_row = (png_bytep)png_malloc(png_ptr, row_bytes + 48); #ifdef PNG_ALIGNED_MEMORY_SUPPORTED /* Use 16-byte aligned memory for row_buf with at least 16 bytes - * of padding before and after row_buf. + * of padding before and after row_buf; treat prev_row similarly. + * NOTE: the alignment is to the start of the pixels, one beyond the start + * of the buffer, because of the filter byte. Prior to libpng 1.5.6 this + * was incorrect; the filter byte was aligned, which had the exact + * opposite effect of that intended. */ - png_ptr->row_buf = png_ptr->big_row_buf + 32 - - (((png_alloc_size_t)&(png_ptr->big_row_buf[0]) + 15) % 16); - png_ptr->old_big_row_buf_size = row_bytes + 48; + { + png_bytep temp = png_ptr->big_row_buf + 32; + int extra = (int)((temp - (png_bytep)0) & 0x0f); + png_ptr->row_buf = temp - extra - 1/*filter byte*/; + + temp = png_ptr->big_prev_row + 32; + extra = (int)((temp - (png_bytep)0) & 0x0f); + png_ptr->prev_row = temp - extra - 1/*filter byte*/; + } + #else - /* Use 32 bytes of padding before and 16 bytes after row_buf. */ - png_ptr->row_buf = png_ptr->big_row_buf + 32; + /* Use 31 bytes of padding before and 17 bytes after row_buf. */ + png_ptr->row_buf = png_ptr->big_row_buf + 31; + png_ptr->prev_row = png_ptr->big_prev_row + 31; #endif png_ptr->old_big_row_buf_size = row_bytes + 48; } #ifdef PNG_MAX_MALLOC_64K - if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L) + if (png_ptr->rowbytes > 65535) png_error(png_ptr, "This image requires a row greater than 64KB"); + #endif - if ((png_uint_32)png_ptr->rowbytes > (png_uint_32)(PNG_SIZE_MAX - 1)) + if (png_ptr->rowbytes > (PNG_SIZE_MAX - 1)) png_error(png_ptr, "Row has too many bytes to allocate in memory"); - if (png_ptr->rowbytes + 1 > png_ptr->old_prev_row_size) - { - png_free(png_ptr, png_ptr->prev_row); - png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)( - png_ptr->rowbytes + 1)); - png_ptr->old_prev_row_size = png_ptr->rowbytes + 1; - } - png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); - png_debug1(3, "width = %lu,", png_ptr->width); - png_debug1(3, "height = %lu,", png_ptr->height); - png_debug1(3, "iwidth = %lu,", png_ptr->iwidth); - png_debug1(3, "num_rows = %lu,", png_ptr->num_rows); - png_debug1(3, "rowbytes = %lu,", png_ptr->rowbytes); + png_debug1(3, "width = %u,", png_ptr->width); + png_debug1(3, "height = %u,", png_ptr->height); + png_debug1(3, "iwidth = %u,", png_ptr->iwidth); + png_debug1(3, "num_rows = %u,", png_ptr->num_rows); + png_debug1(3, "rowbytes = %lu,", (unsigned long)png_ptr->rowbytes); png_debug1(3, "irowbytes = %lu", - PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1); + (unsigned long)PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1); png_ptr->flags |= PNG_FLAG_ROW_INIT; } diff --git a/src/png/pngset.c b/src/png/pngset.c index 1f972c4edb..e3767f7efc 100644 --- a/src/png/pngset.c +++ b/src/png/pngset.c @@ -1,8 +1,8 @@ /* pngset.c - storage of image information into info struct * - * Last changed in libpng 1.4.1 [February 25, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -16,14 +16,14 @@ * info struct and allows us to change the structure in the future. */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #include "pngpriv.h" +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + #ifdef PNG_bKGD_SUPPORTED void PNGAPI -png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) +png_set_bKGD(png_structp png_ptr, png_infop info_ptr, + png_const_color_16p background) { png_debug1(1, "in %s storage function", "bKGD"); @@ -36,150 +36,145 @@ png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) #endif #ifdef PNG_cHRM_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_cHRM(png_structp png_ptr, png_infop info_ptr, - double white_x, double white_y, double red_x, double red_y, - double green_x, double green_y, double blue_x, double blue_y) -{ - png_debug1(1, "in %s storage function", "cHRM"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_white = (float)white_x; - info_ptr->y_white = (float)white_y; - info_ptr->x_red = (float)red_x; - info_ptr->y_red = (float)red_y; - info_ptr->x_green = (float)green_x; - info_ptr->y_green = (float)green_y; - info_ptr->x_blue = (float)blue_x; - info_ptr->y_blue = (float)blue_y; -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5); - info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5); - info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5); - info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5); - info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5); - info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5); - info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5); - info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5); -#endif - info_ptr->valid |= PNG_INFO_cHRM; -} -#endif /* PNG_FLOATING_POINT_SUPPORTED */ - -#ifdef PNG_FIXED_POINT_SUPPORTED -void PNGAPI +void PNGFAPI png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, - png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, - png_fixed_point blue_x, png_fixed_point blue_y) + png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, + png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, + png_fixed_point blue_x, png_fixed_point blue_y) { png_debug1(1, "in %s storage function", "cHRM fixed"); if (png_ptr == NULL || info_ptr == NULL) return; -#ifdef PNG_CHECK_cHRM_SUPPORTED +# ifdef PNG_CHECK_cHRM_SUPPORTED if (png_check_cHRM_fixed(png_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) -#endif + white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) +# endif { - info_ptr->int_x_white = white_x; - info_ptr->int_y_white = white_y; - info_ptr->int_x_red = red_x; - info_ptr->int_y_red = red_y; - info_ptr->int_x_green = green_x; - info_ptr->int_y_green = green_y; - info_ptr->int_x_blue = blue_x; - info_ptr->int_y_blue = blue_y; -#ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->x_white = (float)(white_x/100000.); - info_ptr->y_white = (float)(white_y/100000.); - info_ptr->x_red = (float)( red_x/100000.); - info_ptr->y_red = (float)( red_y/100000.); - info_ptr->x_green = (float)(green_x/100000.); - info_ptr->y_green = (float)(green_y/100000.); - info_ptr->x_blue = (float)( blue_x/100000.); - info_ptr->y_blue = (float)( blue_y/100000.); -#endif + info_ptr->x_white = white_x; + info_ptr->y_white = white_y; + info_ptr->x_red = red_x; + info_ptr->y_red = red_y; + info_ptr->x_green = green_x; + info_ptr->y_green = green_y; + info_ptr->x_blue = blue_x; + info_ptr->y_blue = blue_y; info_ptr->valid |= PNG_INFO_cHRM; } } -#endif /* PNG_FIXED_POINT_SUPPORTED */ -#endif /* PNG_cHRM_SUPPORTED */ -#ifdef PNG_gAMA_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) +void PNGFAPI +png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr, + png_fixed_point int_red_X, png_fixed_point int_red_Y, + png_fixed_point int_red_Z, png_fixed_point int_green_X, + png_fixed_point int_green_Y, png_fixed_point int_green_Z, + png_fixed_point int_blue_X, png_fixed_point int_blue_Y, + png_fixed_point int_blue_Z) { - double png_gamma; + png_XYZ XYZ; + png_xy xy; - png_debug1(1, "in %s storage function", "gAMA"); + png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); if (png_ptr == NULL || info_ptr == NULL) return; - /* Check for overflow */ - if (file_gamma > 21474.83) - { - png_warning(png_ptr, "Limiting gamma to 21474.83"); - png_gamma=21474.83; - } - else - png_gamma = file_gamma; - info_ptr->gamma = (float)png_gamma; -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = (int)(png_gamma*100000.+.5); -#endif - info_ptr->valid |= PNG_INFO_gAMA; - if (png_gamma == 0.0) - png_warning(png_ptr, "Setting gamma=0"); + XYZ.redX = int_red_X; + XYZ.redY = int_red_Y; + XYZ.redZ = int_red_Z; + XYZ.greenX = int_green_X; + XYZ.greenY = int_green_Y; + XYZ.greenZ = int_green_Z; + XYZ.blueX = int_blue_X; + XYZ.blueY = int_blue_Y; + XYZ.blueZ = int_blue_Z; + + if (png_xy_from_XYZ(&xy, XYZ)) + png_error(png_ptr, "XYZ values out of representable range"); + + png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy, + xy.greenx, xy.greeny, xy.bluex, xy.bluey); } -#endif + +# ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point - int_gamma) +png_set_cHRM(png_structp png_ptr, png_infop info_ptr, + double white_x, double white_y, double red_x, double red_y, + double green_x, double green_y, double blue_x, double blue_y) { - png_fixed_point png_gamma; + png_set_cHRM_fixed(png_ptr, info_ptr, + png_fixed(png_ptr, white_x, "cHRM White X"), + png_fixed(png_ptr, white_y, "cHRM White Y"), + png_fixed(png_ptr, red_x, "cHRM Red X"), + png_fixed(png_ptr, red_y, "cHRM Red Y"), + png_fixed(png_ptr, green_x, "cHRM Green X"), + png_fixed(png_ptr, green_y, "cHRM Green Y"), + png_fixed(png_ptr, blue_x, "cHRM Blue X"), + png_fixed(png_ptr, blue_y, "cHRM Blue Y")); +} + +void PNGAPI +png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X, + double red_Y, double red_Z, double green_X, double green_Y, double green_Z, + double blue_X, double blue_Y, double blue_Z) +{ + png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, + png_fixed(png_ptr, red_X, "cHRM Red X"), + png_fixed(png_ptr, red_Y, "cHRM Red Y"), + png_fixed(png_ptr, red_Z, "cHRM Red Z"), + png_fixed(png_ptr, green_X, "cHRM Red X"), + png_fixed(png_ptr, green_Y, "cHRM Red Y"), + png_fixed(png_ptr, green_Z, "cHRM Red Z"), + png_fixed(png_ptr, blue_X, "cHRM Red X"), + png_fixed(png_ptr, blue_Y, "cHRM Red Y"), + png_fixed(png_ptr, blue_Z, "cHRM Red Z")); +} +# endif /* PNG_FLOATING_POINT_SUPPORTED */ + +#endif /* PNG_cHRM_SUPPORTED */ +#ifdef PNG_gAMA_SUPPORTED +void PNGFAPI +png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point + file_gamma) +{ png_debug1(1, "in %s storage function", "gAMA"); if (png_ptr == NULL || info_ptr == NULL) return; - if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX) - { - png_warning(png_ptr, "Limiting gamma to 21474.83"); - png_gamma=PNG_UINT_31_MAX; - } + /* Changed in libpng-1.5.4 to limit the values to ensure overflow can't + * occur. Since the fixed point representation is assymetrical it is + * possible for 1/gamma to overflow the limit of 21474 and this means the + * gamma value must be at least 5/100000 and hence at most 20000.0. For + * safety the limits here are a little narrower. The values are 0.00016 to + * 6250.0, which are truly ridiculous gammma values (and will produce + * displays that are all black or all white.) + */ + if (file_gamma < 16 || file_gamma > 625000000) + png_warning(png_ptr, "Out of range gamma value ignored"); + else { - if (int_gamma < 0) - { - png_warning(png_ptr, "Setting negative gamma to zero"); - png_gamma = 0; - } - else - png_gamma = int_gamma; + info_ptr->gamma = file_gamma; + info_ptr->valid |= PNG_INFO_gAMA; } -#ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->gamma = (float)(png_gamma/100000.); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = png_gamma; -#endif - info_ptr->valid |= PNG_INFO_gAMA; - if (png_gamma == 0) - png_warning(png_ptr, "Setting gamma=0"); } + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) +{ + png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, + "png_set_gAMA")); +} +# endif #endif #ifdef PNG_hIST_SUPPORTED void PNGAPI -png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) +png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist) { int i; @@ -192,16 +187,19 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) > PNG_MAX_PALETTE_LENGTH) { png_warning(png_ptr, - "Invalid palette size, hIST allocation skipped"); + "Invalid palette size, hIST allocation skipped"); + return; } png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); + /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in * version 1.2.1 */ png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)); + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)); + if (png_ptr->hist == NULL) { png_warning(png_ptr, "Insufficient memory for hIST chunk data"); @@ -210,18 +208,18 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) for (i = 0; i < info_ptr->num_palette; i++) png_ptr->hist[i] = hist[i]; + info_ptr->hist = png_ptr->hist; info_ptr->valid |= PNG_INFO_hIST; - info_ptr->free_me |= PNG_FREE_HIST; } #endif void PNGAPI png_set_IHDR(png_structp png_ptr, png_infop info_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, - int filter_type) + png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_type, int compression_type, + int filter_type) { png_debug1(1, "in %s storage function", "IHDR"); @@ -242,21 +240,25 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr, if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) info_ptr->channels = 1; + else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) info_ptr->channels = 3; + else info_ptr->channels = 1; + if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) info_ptr->channels++; + info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); /* Check for potential overflow */ - if (width > (PNG_UINT_32_MAX - >> 3) /* 8-byte RGBA pixels */ - - 64 /* bigrowbuf hack */ - - 1 /* filter byte */ - - 7*8 /* rounding of width to multiple of 8 pixels */ - - 8) /* extra max_pixel_depth pad */ + if (width > + (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */ + - 48 /* bigrowbuf hack */ + - 1 /* filter byte */ + - 7*8 /* rounding of width to multiple of 8 pixels */ + - 8) /* extra max_pixel_depth pad */ info_ptr->rowbytes = 0; else info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); @@ -265,7 +267,7 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_oFFs_SUPPORTED void PNGAPI png_set_oFFs(png_structp png_ptr, png_infop info_ptr, - png_int_32 offset_x, png_int_32 offset_y, int unit_type) + png_int_32 offset_x, png_int_32 offset_y, int unit_type) { png_debug1(1, "in %s storage function", "oFFs"); @@ -282,8 +284,8 @@ png_set_oFFs(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_pCAL_SUPPORTED void PNGAPI png_set_pCAL(png_structp png_ptr, png_infop info_ptr, - png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, - png_charp units, png_charpp params) + png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, + int nparams, png_const_charp units, png_charpp params) { png_size_t length; int i; @@ -295,13 +297,27 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, length = png_strlen(purpose) + 1; png_debug1(3, "allocating purpose for info (%lu bytes)", - (unsigned long)length); + (unsigned long)length); + + /* TODO: validate format of calibration name and unit name */ + + /* Check that the type matches the specification. */ + if (type < 0 || type > 3) + png_error(png_ptr, "Invalid pCAL equation type"); + + /* Validate params[nparams] */ + for (i=0; ipcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_purpose == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL purpose"); return; } + png_memcpy(info_ptr->pcal_purpose, purpose, length); png_debug(3, "storing X0, X1, type, and nparams in info"); @@ -313,16 +329,20 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, length = png_strlen(units) + 1; png_debug1(3, "allocating units for info (%lu bytes)", (unsigned long)length); + info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_units == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL units"); return; } + png_memcpy(info_ptr->pcal_units, units, length); info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, - (png_size_t)((nparams + 1) * png_sizeof(png_charp))); + (png_size_t)((nparams + 1) * png_sizeof(png_charp))); + if (info_ptr->pcal_params == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL params"); @@ -335,13 +355,16 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, { length = png_strlen(params[i]) + 1; png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, - (unsigned long)length); + (unsigned long)length); + info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_params[i] == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL parameter"); return; } + png_memcpy(info_ptr->pcal_params[i], params[i], length); } @@ -350,74 +373,132 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, } #endif -#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED +#ifdef PNG_sCAL_SUPPORTED void PNGAPI -png_set_sCAL(png_structp png_ptr, png_infop info_ptr, - int unit, double width, double height) +png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, + int unit, png_const_charp swidth, png_const_charp sheight) { + png_size_t lengthw = 0, lengthh = 0; + png_debug1(1, "in %s storage function", "sCAL"); if (png_ptr == NULL || info_ptr == NULL) return; - info_ptr->scal_unit = (png_byte)unit; - info_ptr->scal_pixel_width = width; - info_ptr->scal_pixel_height = height; - - info_ptr->valid |= PNG_INFO_sCAL; -} -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -void PNGAPI -png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, - int unit, png_charp swidth, png_charp sheight) -{ - png_size_t length; + /* Double check the unit (should never get here with an invalid + * unit unless this is an API call.) + */ + if (unit != 1 && unit != 2) + png_error(png_ptr, "Invalid sCAL unit"); - png_debug1(1, "in %s storage function", "sCAL"); + if (swidth == NULL || (lengthw = png_strlen(swidth)) == 0 || + swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) + png_error(png_ptr, "Invalid sCAL width"); - if (png_ptr == NULL || info_ptr == NULL) - return; + if (sheight == NULL || (lengthh = png_strlen(sheight)) == 0 || + sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) + png_error(png_ptr, "Invalid sCAL height"); info_ptr->scal_unit = (png_byte)unit; - length = png_strlen(swidth) + 1; - png_debug1(3, "allocating unit for info (%u bytes)", - (unsigned int)length); - info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length); + ++lengthw; + + png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); + + info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw); + if (info_ptr->scal_s_width == NULL) { - png_warning(png_ptr, - "Memory allocation failed while processing sCAL"); + png_warning(png_ptr, "Memory allocation failed while processing sCAL"); return; } - png_memcpy(info_ptr->scal_s_width, swidth, length); - length = png_strlen(sheight) + 1; - png_debug1(3, "allocating unit for info (%u bytes)", - (unsigned int)length); - info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length); + png_memcpy(info_ptr->scal_s_width, swidth, lengthw); + + ++lengthh; + + png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); + + info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh); + if (info_ptr->scal_s_height == NULL) { png_free (png_ptr, info_ptr->scal_s_width); info_ptr->scal_s_width = NULL; - png_warning(png_ptr, - "Memory allocation failed while processing sCAL"); + + png_warning(png_ptr, "Memory allocation failed while processing sCAL"); return; } - png_memcpy(info_ptr->scal_s_height, sheight, length); + + png_memcpy(info_ptr->scal_s_height, sheight, lengthh); + info_ptr->valid |= PNG_INFO_sCAL; info_ptr->free_me |= PNG_FREE_SCAL; } -#endif -#endif + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, + double height) +{ + png_debug1(1, "in %s storage function", "sCAL"); + + /* Check the arguments. */ + if (width <= 0) + png_warning(png_ptr, "Invalid sCAL width ignored"); + + else if (height <= 0) + png_warning(png_ptr, "Invalid sCAL height ignored"); + + else + { + /* Convert 'width' and 'height' to ASCII. */ + char swidth[PNG_sCAL_MAX_DIGITS+1]; + char sheight[PNG_sCAL_MAX_DIGITS+1]; + + png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width, + PNG_sCAL_PRECISION); + png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height, + PNG_sCAL_PRECISION); + + png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); + } +} +# endif + +# ifdef PNG_FIXED_POINT_SUPPORTED +void PNGAPI +png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, + png_fixed_point width, png_fixed_point height) +{ + png_debug1(1, "in %s storage function", "sCAL"); + + /* Check the arguments. */ + if (width <= 0) + png_warning(png_ptr, "Invalid sCAL width ignored"); + + else if (height <= 0) + png_warning(png_ptr, "Invalid sCAL height ignored"); + + else + { + /* Convert 'width' and 'height' to ASCII. */ + char swidth[PNG_sCAL_MAX_DIGITS+1]; + char sheight[PNG_sCAL_MAX_DIGITS+1]; + + png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width); + png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height); + + png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); + } +} +# endif #endif #ifdef PNG_pHYs_SUPPORTED void PNGAPI png_set_pHYs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type) + png_uint_32 res_x, png_uint_32 res_y, int unit_type) { png_debug1(1, "in %s storage function", "pHYs"); @@ -433,7 +514,7 @@ png_set_pHYs(png_structp png_ptr, png_infop info_ptr, void PNGAPI png_set_PLTE(png_structp png_ptr, png_infop info_ptr, - png_colorp palette, int num_palette) + png_const_colorp palette, int num_palette) { png_debug1(1, "in %s storage function", "PLTE"); @@ -445,6 +526,7 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, { if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) png_error(png_ptr, "Invalid palette length"); + else { png_warning(png_ptr, "Invalid palette length"); @@ -463,7 +545,8 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, * too-large sample values. */ png_ptr->palette = (png_colorp)png_calloc(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); + png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); info_ptr->palette = png_ptr->palette; info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; @@ -476,7 +559,7 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_sBIT_SUPPORTED void PNGAPI png_set_sBIT(png_structp png_ptr, png_infop info_ptr, - png_color_8p sig_bit) + png_const_color_8p sig_bit) { png_debug1(1, "in %s storage function", "sBIT"); @@ -490,85 +573,41 @@ png_set_sBIT(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_sRGB_SUPPORTED void PNGAPI -png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) +png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent) { png_debug1(1, "in %s storage function", "sRGB"); if (png_ptr == NULL || info_ptr == NULL) return; - info_ptr->srgb_intent = (png_byte)intent; + info_ptr->srgb_intent = (png_byte)srgb_intent; info_ptr->valid |= PNG_INFO_sRGB; } void PNGAPI png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, - int intent) + int srgb_intent) { -#ifdef PNG_gAMA_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED - float file_gamma; -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_fixed_point int_file_gamma; -#endif -#endif -#ifdef PNG_cHRM_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED - float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; -#endif - png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, - int_green_y, int_blue_x, int_blue_y; -#endif png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); if (png_ptr == NULL || info_ptr == NULL) return; - png_set_sRGB(png_ptr, info_ptr, intent); + png_set_sRGB(png_ptr, info_ptr, srgb_intent); -#ifdef PNG_gAMA_SUPPORTED -#ifdef PNG_FLOATING_POINT_SUPPORTED - file_gamma = (float).45455; - png_set_gAMA(png_ptr, info_ptr, file_gamma); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - int_file_gamma = 45455L; - png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); -#endif -#endif +# ifdef PNG_gAMA_SUPPORTED + png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); +# endif -#ifdef PNG_cHRM_SUPPORTED - int_white_x = 31270L; - int_white_y = 32900L; - int_red_x = 64000L; - int_red_y = 33000L; - int_green_x = 30000L; - int_green_y = 60000L; - int_blue_x = 15000L; - int_blue_y = 6000L; - -#ifdef PNG_FLOATING_POINT_SUPPORTED - white_x = (float).3127; - white_y = (float).3290; - red_x = (float).64; - red_y = (float).33; - green_x = (float).30; - green_y = (float).60; - blue_x = (float).15; - blue_y = (float).06; -#endif - -#ifdef PNG_FIXED_POINT_SUPPORTED +# ifdef PNG_cHRM_SUPPORTED png_set_cHRM_fixed(png_ptr, info_ptr, - int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, - int_green_y, int_blue_x, int_blue_y); -#endif -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_cHRM(png_ptr, info_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); -#endif -#endif /* cHRM */ + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 + ); +# endif /* cHRM */ } #endif /* sRGB */ @@ -576,12 +615,12 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_iCCP_SUPPORTED void PNGAPI png_set_iCCP(png_structp png_ptr, png_infop info_ptr, - png_charp name, int compression_type, - png_charp profile, png_uint_32 proflen) + png_const_charp name, int compression_type, + png_const_bytep profile, png_uint_32 proflen) { png_charp new_iccp_name; - png_charp new_iccp_profile; - png_uint_32 length; + png_bytep new_iccp_profile; + png_size_t length; png_debug1(1, "in %s storage function", "iCCP"); @@ -590,13 +629,16 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, length = png_strlen(name)+1; new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); + if (new_iccp_name == NULL) { png_warning(png_ptr, "Insufficient memory to process iCCP chunk"); return; } + png_memcpy(new_iccp_name, name, length); - new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen); + new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen); + if (new_iccp_profile == NULL) { png_free (png_ptr, new_iccp_name); @@ -604,6 +646,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, "Insufficient memory to process iCCP profile"); return; } + png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); @@ -622,24 +665,24 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_TEXT_SUPPORTED void PNGAPI -png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, - int num_text) +png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, + int num_text) { int ret; ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); + if (ret) png_error(png_ptr, "Insufficient memory to store text"); } int /* PRIVATE */ -png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, - int num_text) +png_set_text_2(png_structp png_ptr, png_infop info_ptr, + png_const_textp text_ptr, int num_text) { int i; - png_debug1(1, "in %s storage function", ((png_ptr == NULL || - png_ptr->chunk_name[0] == '\0') ? - "text" : (png_const_charp)png_ptr->chunk_name)); + png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" : + (unsigned long)png_ptr->chunk_name); if (png_ptr == NULL || info_ptr == NULL || num_text == 0) return(0); @@ -659,27 +702,31 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, old_text = info_ptr->text; info_ptr->text = (png_textp)png_malloc_warn(png_ptr, (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); + if (info_ptr->text == NULL) { png_free(png_ptr, old_text); return(1); } + png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * - png_sizeof(png_text))); + png_sizeof(png_text))); png_free(png_ptr, old_text); } + else { info_ptr->max_text = num_text + 8; info_ptr->num_text = 0; info_ptr->text = (png_textp)png_malloc_warn(png_ptr, - (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); + (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); if (info_ptr->text == NULL) return(1); info_ptr->free_me |= PNG_FREE_TEXT; } + png_debug1(3, "allocated %d entries for info_ptr->text", - info_ptr->max_text); + info_ptr->max_text); } for (i = 0; i < num_text; i++) { @@ -690,6 +737,13 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, if (text_ptr[i].key == NULL) continue; + if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || + text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) + { + png_warning(png_ptr, "text compression mode is out of range"); + continue; + } + key_len = png_strlen(text_ptr[i].key); if (text_ptr[i].compression <= 0) @@ -699,34 +753,38 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, } else -#ifdef PNG_iTXt_SUPPORTED +# ifdef PNG_iTXt_SUPPORTED { /* Set iTXt data */ if (text_ptr[i].lang != NULL) lang_len = png_strlen(text_ptr[i].lang); + else lang_len = 0; + if (text_ptr[i].lang_key != NULL) lang_key_len = png_strlen(text_ptr[i].lang_key); + else lang_key_len = 0; } -#else /* PNG_iTXt_SUPPORTED */ +# else /* PNG_iTXt_SUPPORTED */ { png_warning(png_ptr, "iTXt chunk not supported"); continue; } -#endif +# endif if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') { text_length = 0; -#ifdef PNG_iTXt_SUPPORTED +# ifdef PNG_iTXt_SUPPORTED if (text_ptr[i].compression > 0) textp->compression = PNG_ITXT_COMPRESSION_NONE; + else -#endif +# endif textp->compression = PNG_TEXT_COMPRESSION_NONE; } @@ -737,18 +795,20 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, } textp->key = (png_charp)png_malloc_warn(png_ptr, - (png_size_t) - (key_len + text_length + lang_len + lang_key_len + 4)); + (png_size_t) + (key_len + text_length + lang_len + lang_key_len + 4)); + if (textp->key == NULL) return(1); - png_debug2(2, "Allocated %lu bytes at %x in png_set_text", - (unsigned long)(png_uint_32) - (key_len + lang_len + lang_key_len + text_length + 4), - (int)textp->key); + + png_debug2(2, "Allocated %lu bytes at %p in png_set_text", + (unsigned long)(png_uint_32) + (key_len + lang_len + lang_key_len + text_length + 4), + textp->key); png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len)); *(textp->key + key_len) = '\0'; -#ifdef PNG_iTXt_SUPPORTED + if (text_ptr[i].compression > 0) { textp->lang = textp->key + key_len + 1; @@ -759,35 +819,34 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, *(textp->lang_key + lang_key_len) = '\0'; textp->text = textp->lang_key + lang_key_len + 1; } + else -#endif { -#ifdef PNG_iTXt_SUPPORTED textp->lang=NULL; textp->lang_key=NULL; -#endif textp->text = textp->key + key_len + 1; } + if (text_length) png_memcpy(textp->text, text_ptr[i].text, - (png_size_t)(text_length)); + (png_size_t)(text_length)); + *(textp->text + text_length) = '\0'; -#ifdef PNG_iTXt_SUPPORTED +# ifdef PNG_iTXt_SUPPORTED if (textp->compression > 0) { textp->text_length = 0; textp->itxt_length = text_length; } - else -#endif + else +# endif { textp->text_length = text_length; -#ifdef PNG_iTXt_SUPPORTED textp->itxt_length = 0; -#endif } + info_ptr->num_text++; png_debug1(3, "transferred text chunk %d", info_ptr->num_text); } @@ -797,7 +856,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, #ifdef PNG_tIME_SUPPORTED void PNGAPI -png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) +png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) { png_debug1(1, "in %s storage function", "tIME"); @@ -813,7 +872,7 @@ png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) #ifdef PNG_tRNS_SUPPORTED void PNGAPI png_set_tRNS(png_structp png_ptr, png_infop info_ptr, - png_bytep trans_alpha, int num_trans, png_color_16p trans_color) + png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) { png_debug1(1, "in %s storage function", "tRNS"); @@ -830,8 +889,9 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr, png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ - png_ptr->trans_alpha = info_ptr->trans_alpha = (png_bytep)png_malloc(png_ptr, - (png_size_t)PNG_MAX_PALETTE_LENGTH); + png_ptr->trans_alpha = info_ptr->trans_alpha = + (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH); + if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); } @@ -839,6 +899,7 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr, if (trans_color != NULL) { int sample_max = (1 << info_ptr->bit_depth); + if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && (int)trans_color->gray > sample_max) || (info_ptr->color_type == PNG_COLOR_TYPE_RGB && @@ -847,13 +908,16 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr, (int)trans_color->blue > sample_max))) png_warning(png_ptr, "tRNS chunk has out-of-range samples for bit_depth"); + png_memcpy(&(info_ptr->trans_color), trans_color, png_sizeof(png_color_16)); + if (num_trans == 0) num_trans = 1; } info_ptr->num_trans = (png_uint_16)num_trans; + if (num_trans != 0) { info_ptr->valid |= PNG_INFO_tRNS; @@ -865,11 +929,12 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_sPLT_SUPPORTED void PNGAPI png_set_sPLT(png_structp png_ptr, - png_infop info_ptr, png_sPLT_tp entries, int nentries) + png_infop info_ptr, png_const_sPLT_tp entries, int nentries) /* * entries - array of png_sPLT_t structures * to be added to the list of palettes * in the info structure. + * * nentries - number of palette structures to be * added. */ @@ -882,7 +947,8 @@ png_set_sPLT(png_structp png_ptr, np = (png_sPLT_tp)png_malloc_warn(png_ptr, (info_ptr->splt_palettes_num + nentries) * - (png_size_t)png_sizeof(png_sPLT_t)); + (png_size_t)png_sizeof(png_sPLT_t)); + if (np == NULL) { png_warning(png_ptr, "No memory for sPLT palettes"); @@ -891,36 +957,42 @@ png_set_sPLT(png_structp png_ptr, png_memcpy(np, info_ptr->splt_palettes, info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); + png_free(png_ptr, info_ptr->splt_palettes); info_ptr->splt_palettes=NULL; for (i = 0; i < nentries; i++) { png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; - png_sPLT_tp from = entries + i; - png_uint_32 length; + png_const_sPLT_tp from = entries + i; + png_size_t length; length = png_strlen(from->name) + 1; - to->name = (png_charp)png_malloc_warn(png_ptr, (png_size_t)length); + to->name = (png_charp)png_malloc_warn(png_ptr, length); + if (to->name == NULL) { png_warning(png_ptr, - "Out of memory while processing sPLT chunk"); + "Out of memory while processing sPLT chunk"); continue; } + png_memcpy(to->name, from->name, length); to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, - (png_size_t)(from->nentries * png_sizeof(png_sPLT_entry))); + from->nentries * png_sizeof(png_sPLT_entry)); + if (to->entries == NULL) { png_warning(png_ptr, - "Out of memory while processing sPLT chunk"); + "Out of memory while processing sPLT chunk"); png_free(png_ptr, to->name); to->name = NULL; continue; } + png_memcpy(to->entries, from->entries, from->nentries * png_sizeof(png_sPLT_entry)); + to->nentries = from->nentries; to->depth = from->depth; } @@ -935,7 +1007,7 @@ png_set_sPLT(png_structp png_ptr, #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED void PNGAPI png_set_unknown_chunks(png_structp png_ptr, - png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) + png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) { png_unknown_chunkp np; int i; @@ -944,8 +1016,9 @@ png_set_unknown_chunks(png_structp png_ptr, return; np = (png_unknown_chunkp)png_malloc_warn(png_ptr, - (png_size_t)((info_ptr->unknown_chunks_num + num_unknowns) * - png_sizeof(png_unknown_chunk))); + (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) * + png_sizeof(png_unknown_chunk)); + if (np == NULL) { png_warning(png_ptr, @@ -954,34 +1027,39 @@ png_set_unknown_chunks(png_structp png_ptr, } png_memcpy(np, info_ptr->unknown_chunks, - info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk)); + (png_size_t)info_ptr->unknown_chunks_num * + png_sizeof(png_unknown_chunk)); + png_free(png_ptr, info_ptr->unknown_chunks); info_ptr->unknown_chunks = NULL; for (i = 0; i < num_unknowns; i++) { png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; - png_unknown_chunkp from = unknowns + i; + png_const_unknown_chunkp from = unknowns + i; - png_memcpy((png_charp)to->name, (png_charp)from->name, - png_sizeof(from->name)); + png_memcpy(to->name, from->name, png_sizeof(from->name)); to->name[png_sizeof(to->name)-1] = '\0'; to->size = from->size; + /* Note our location in the read or write sequence */ to->location = (png_byte)(png_ptr->mode & 0xff); if (from->size == 0) to->data=NULL; + else { to->data = (png_bytep)png_malloc_warn(png_ptr, - (png_size_t)from->size); + (png_size_t)from->size); + if (to->data == NULL) { png_warning(png_ptr, - "Out of memory while processing unknown chunk"); + "Out of memory while processing unknown chunk"); to->size = 0; } + else png_memcpy(to->data, from->data, from->size); } @@ -991,12 +1069,13 @@ png_set_unknown_chunks(png_structp png_ptr, info_ptr->unknown_chunks_num += num_unknowns; info_ptr->free_me |= PNG_FREE_UNKN; } + void PNGAPI png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, - int chunk, int location) + int chunk, int location) { if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < - (int)info_ptr->unknown_chunks_num) + info_ptr->unknown_chunks_num) info_ptr->unknown_chunks[chunk].location = (png_byte)location; } #endif @@ -1010,40 +1089,48 @@ png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) if (png_ptr == NULL) return (png_uint_32)0; + png_ptr->mng_features_permitted = - (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); + (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); + return (png_uint_32)png_ptr->mng_features_permitted; } #endif #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED void PNGAPI -png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep - chunk_list, int num_chunks) +png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep + chunk_list, int num_chunks) { png_bytep new_list, p; int i, old_num_chunks; if (png_ptr == NULL) return; + if (num_chunks == 0) { if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + else png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; if (keep == PNG_HANDLE_CHUNK_ALWAYS) png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; + else png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; + return; } + if (chunk_list == NULL) return; + old_num_chunks = png_ptr->num_chunk_list; new_list=(png_bytep)png_malloc(png_ptr, - (png_size_t) - (5*(num_chunks + old_num_chunks))); + (png_size_t)(5*(num_chunks + old_num_chunks))); + if (png_ptr->chunk_list != NULL) { png_memcpy(new_list, png_ptr->chunk_list, @@ -1051,10 +1138,13 @@ png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep png_free(png_ptr, png_ptr->chunk_list); png_ptr->chunk_list=NULL; } + png_memcpy(new_list + 5*old_num_chunks, chunk_list, (png_size_t)(5*num_chunks)); + for (p = new_list + 5*old_num_chunks + 4, i = 0; inum_chunk_list = old_num_chunks + num_chunks; png_ptr->chunk_list = new_list; png_ptr->free_me |= PNG_FREE_LIST; @@ -1064,7 +1154,7 @@ png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep #ifdef PNG_READ_USER_CHUNKS_SUPPORTED void PNGAPI png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, - png_user_chunk_ptr read_user_chunk_fn) + png_user_chunk_ptr read_user_chunk_fn) { png_debug(1, "in png_set_read_user_chunk_fn"); @@ -1087,23 +1177,40 @@ png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); + info_ptr->row_pointers = row_pointers; + if (row_pointers) info_ptr->valid |= PNG_INFO_IDAT; } #endif void PNGAPI -png_set_compression_buffer_size(png_structp png_ptr, - png_size_t size) +png_set_compression_buffer_size(png_structp png_ptr, png_size_t size) { if (png_ptr == NULL) return; + png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf_size = size; + + if (size > ZLIB_IO_MAX) + { + png_warning(png_ptr, "Attempt to set buffer size beyond max ignored"); + png_ptr->zbuf_size = ZLIB_IO_MAX; + size = ZLIB_IO_MAX; /* must fit */ + } + + else + png_ptr->zbuf_size = (uInt)size; + png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); + + /* The following ensures a relatively safe failure if this gets called while + * the buffer is actually in use. + */ png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; + png_ptr->zstream.avail_out = 0; + png_ptr->zstream.avail_in = 0; } void PNGAPI @@ -1127,6 +1234,7 @@ png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, */ if (png_ptr == NULL) return; + png_ptr->user_width_max = user_width_max; png_ptr->user_height_max = user_height_max; } @@ -1143,11 +1251,10 @@ png_set_chunk_cache_max (png_structp png_ptr, /* This function was added to libpng 1.4.1 */ void PNGAPI png_set_chunk_malloc_max (png_structp png_ptr, - png_alloc_size_t user_chunk_malloc_max) + png_alloc_size_t user_chunk_malloc_max) { - if (png_ptr) - png_ptr->user_chunk_malloc_max = - (png_size_t)user_chunk_malloc_max; + if (png_ptr) + png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; } #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ @@ -1160,6 +1267,7 @@ png_set_benign_errors(png_structp png_ptr, int allowed) if (allowed) png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; + else png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN; } diff --git a/src/png/pngstruct.h b/src/png/pngstruct.h new file mode 100644 index 0000000000..33f23844a4 --- /dev/null +++ b/src/png/pngstruct.h @@ -0,0 +1,357 @@ + +/* pngstruct.h - header file for PNG reference library + * + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * Last changed in libpng 1.5.5 [September 22, 2011] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +/* The structure that holds the information to read and write PNG files. + * The only people who need to care about what is inside of this are the + * people who will be modifying the library for their own special needs. + * It should NOT be accessed directly by an application. + */ + +#ifndef PNGSTRUCT_H +#define PNGSTRUCT_H +/* zlib.h defines the structure z_stream, an instance of which is included + * in this structure and is required for decompressing the LZ compressed + * data in PNG files. + */ +#include "zlib.h" + +struct png_struct_def +{ +#ifdef PNG_SETJMP_SUPPORTED + jmp_buf longjmp_buffer; /* used in png_error */ + png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */ +#endif + png_error_ptr error_fn; /* function for printing errors and aborting */ +#ifdef PNG_WARNINGS_SUPPORTED + png_error_ptr warning_fn; /* function for printing warnings */ +#endif + png_voidp error_ptr; /* user supplied struct for error functions */ + png_rw_ptr write_data_fn; /* function for writing output data */ + png_rw_ptr read_data_fn; /* function for reading input data */ + png_voidp io_ptr; /* ptr to application struct for I/O functions */ + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + png_user_transform_ptr read_user_transform_fn; /* user read transform */ +#endif + +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED + png_user_transform_ptr write_user_transform_fn; /* user write transform */ +#endif + +/* These were added in libpng-1.0.2 */ +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) + png_voidp user_transform_ptr; /* user supplied struct for user transform */ + png_byte user_transform_depth; /* bit depth of user transformed pixels */ + png_byte user_transform_channels; /* channels in user transformed pixels */ +#endif +#endif + + png_uint_32 mode; /* tells us where we are in the PNG file */ + png_uint_32 flags; /* flags indicating various things to libpng */ + png_uint_32 transformations; /* which transformations to perform */ + + z_stream zstream; /* pointer to decompression structure (below) */ + png_bytep zbuf; /* buffer for zlib */ + uInt zbuf_size; /* size of zbuf (typically 65536) */ +#ifdef PNG_WRITE_SUPPORTED + +/* Added in 1.5.4: state to keep track of whether the zstream has been + * initialized and if so whether it is for IDAT or some other chunk. + */ +#define PNG_ZLIB_UNINITIALIZED 0 +#define PNG_ZLIB_FOR_IDAT 1 +#define PNG_ZLIB_FOR_TEXT 2 /* anything other than IDAT */ +#define PNG_ZLIB_USE_MASK 3 /* bottom two bits */ +#define PNG_ZLIB_IN_USE 4 /* a flag value */ + + png_uint_32 zlib_state; /* State of zlib initialization */ +/* End of material added at libpng 1.5.4 */ + + int zlib_level; /* holds zlib compression level */ + int zlib_method; /* holds zlib compression method */ + int zlib_window_bits; /* holds zlib compression window bits */ + int zlib_mem_level; /* holds zlib compression memory level */ + int zlib_strategy; /* holds zlib compression strategy */ +#endif +/* Added at libpng 1.5.4 */ +#if defined(PNG_WRITE_COMPRESSED_TEXT_SUPPORTED) || \ + defined(PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED) + int zlib_text_level; /* holds zlib compression level */ + int zlib_text_method; /* holds zlib compression method */ + int zlib_text_window_bits; /* holds zlib compression window bits */ + int zlib_text_mem_level; /* holds zlib compression memory level */ + int zlib_text_strategy; /* holds zlib compression strategy */ +#endif +/* End of material added at libpng 1.5.4 */ + + png_uint_32 width; /* width of image in pixels */ + png_uint_32 height; /* height of image in pixels */ + png_uint_32 num_rows; /* number of rows in current pass */ + png_uint_32 usr_width; /* width of row at start of write */ + png_size_t rowbytes; /* size of row in bytes */ + png_uint_32 iwidth; /* width of current interlaced row in pixels */ + png_uint_32 row_number; /* current row in interlace pass */ + png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */ + png_bytep prev_row; /* buffer to save previous (unfiltered) row. + * This is a pointer into big_prev_row + */ + png_bytep row_buf; /* buffer to save current (unfiltered) row. + * This is a pointer into big_row_buf + */ + png_bytep sub_row; /* buffer to save "sub" row when filtering */ + png_bytep up_row; /* buffer to save "up" row when filtering */ + png_bytep avg_row; /* buffer to save "avg" row when filtering */ + png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */ + png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */ + + png_uint_32 idat_size; /* current IDAT size for read */ + png_uint_32 crc; /* current chunk CRC value */ + png_colorp palette; /* palette from the input file */ + png_uint_16 num_palette; /* number of color entries in palette */ + png_uint_16 num_trans; /* number of transparency values */ + png_byte compression; /* file compression type (always 0) */ + png_byte filter; /* file filter type (always 0) */ + png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ + png_byte pass; /* current interlace pass (0 - 6) */ + png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */ + png_byte color_type; /* color type of file */ + png_byte bit_depth; /* bit depth of file */ + png_byte usr_bit_depth; /* bit depth of users row: write only */ + png_byte pixel_depth; /* number of bits per pixel */ + png_byte channels; /* number of channels in file */ + png_byte usr_channels; /* channels at start of write: write only */ + png_byte sig_bytes; /* magic bytes read/written from start of file */ + png_byte maximum_pixel_depth; + /* pixel depth used for the row buffers */ + png_byte transformed_pixel_depth; + /* pixel depth after read/write transforms */ + png_byte io_chunk_string[5]; + /* string name of chunk */ + +#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) + png_uint_16 filler; /* filler bytes for pixel expansion */ +#endif + +#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) + png_byte background_gamma_type; + png_fixed_point background_gamma; + png_color_16 background; /* background color in screen gamma space */ +#ifdef PNG_READ_GAMMA_SUPPORTED + png_color_16 background_1; /* background normalized to gamma 1.0 */ +#endif +#endif /* PNG_bKGD_SUPPORTED */ + +#ifdef PNG_WRITE_FLUSH_SUPPORTED + png_flush_ptr output_flush_fn; /* Function for flushing output */ + png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */ + png_uint_32 flush_rows; /* number of rows written since last flush */ +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED + int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */ + png_fixed_point gamma; /* file gamma value */ + png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */ + + png_bytep gamma_table; /* gamma table for 8-bit depth files */ + png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */ +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) + png_bytep gamma_from_1; /* converts from 1.0 to screen */ + png_bytep gamma_to_1; /* converts from file to 1.0 */ + png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */ + png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */ +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED) + png_color_8 sig_bit; /* significant bits in each available channel */ +#endif + +#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) + png_color_8 shift; /* shift for significant bit tranformation */ +#endif + +#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ + || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + png_bytep trans_alpha; /* alpha values for paletted files */ + png_color_16 trans_color; /* transparent color for non-paletted files */ +#endif + + png_read_status_ptr read_row_fn; /* called after each row is decoded */ + png_write_status_ptr write_row_fn; /* called after each row is encoded */ +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED + png_progressive_info_ptr info_fn; /* called after header data fully read */ + png_progressive_row_ptr row_fn; /* called after a prog. row is decoded */ + png_progressive_end_ptr end_fn; /* called after image is complete */ + png_bytep save_buffer_ptr; /* current location in save_buffer */ + png_bytep save_buffer; /* buffer for previously read data */ + png_bytep current_buffer_ptr; /* current location in current_buffer */ + png_bytep current_buffer; /* buffer for recently used data */ + png_uint_32 push_length; /* size of current input chunk */ + png_uint_32 skip_length; /* bytes to skip in input data */ + png_size_t save_buffer_size; /* amount of data now in save_buffer */ + png_size_t save_buffer_max; /* total size of save_buffer */ + png_size_t buffer_size; /* total amount of available input data */ + png_size_t current_buffer_size; /* amount of data now in current_buffer */ + int process_mode; /* what push library is currently doing */ + int cur_palette; /* current push library palette index */ + +# ifdef PNG_TEXT_SUPPORTED + png_size_t current_text_size; /* current size of text input data */ + png_size_t current_text_left; /* how much text left to read in input */ + png_charp current_text; /* current text chunk buffer */ + png_charp current_text_ptr; /* current location in current_text */ +# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */ + +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ + +#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) +/* For the Borland special 64K segment handler */ + png_bytepp offset_table_ptr; + png_bytep offset_table; + png_uint_16 offset_table_number; + png_uint_16 offset_table_count; + png_uint_16 offset_table_count_free; +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED + png_bytep palette_lookup; /* lookup table for quantizing */ + png_bytep quantize_index; /* index translation for palette files */ +#endif + +#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED) + png_uint_16p hist; /* histogram */ +#endif + +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED + png_byte heuristic_method; /* heuristic for row filter selection */ + png_byte num_prev_filters; /* number of weights for previous rows */ + png_bytep prev_filters; /* filter type(s) of previous row(s) */ + png_uint_16p filter_weights; /* weight(s) for previous line(s) */ + png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */ + png_uint_16p filter_costs; /* relative filter calculation cost */ + png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */ +#endif + +#ifdef PNG_TIME_RFC1123_SUPPORTED + char time_buffer[29]; /* String to hold RFC 1123 time text */ +#endif + +/* New members added in libpng-1.0.6 */ + + png_uint_32 free_me; /* flags items libpng is responsible for freeing */ + +#ifdef PNG_USER_CHUNKS_SUPPORTED + png_voidp user_chunk_ptr; + png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */ +#endif + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + int num_chunk_list; + png_bytep chunk_list; +#endif + +#ifdef PNG_READ_sRGB_SUPPORTED + /* Added in 1.5.5 to record an sRGB chunk in the png. */ + png_byte is_sRGB; +#endif + +/* New members added in libpng-1.0.3 */ +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + png_byte rgb_to_gray_status; + /* Added in libpng 1.5.5 to record setting of coefficients: */ + png_byte rgb_to_gray_coefficients_set; + /* These were changed from png_byte in libpng-1.0.6 */ + png_uint_16 rgb_to_gray_red_coeff; + png_uint_16 rgb_to_gray_green_coeff; + /* deleted in 1.5.5: rgb_to_gray_blue_coeff; */ +#endif + +/* New member added in libpng-1.0.4 (renamed in 1.0.9) */ +#if defined(PNG_MNG_FEATURES_SUPPORTED) || \ + defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ + defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) +/* Changed from png_byte to png_uint_32 at version 1.2.0 */ + png_uint_32 mng_features_permitted; +#endif + +/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */ +#ifdef PNG_MNG_FEATURES_SUPPORTED + png_byte filter_type; +#endif + +/* New members added in libpng-1.2.0 */ + +/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */ +#ifdef PNG_USER_MEM_SUPPORTED + png_voidp mem_ptr; /* user supplied struct for mem functions */ + png_malloc_ptr malloc_fn; /* function for allocating memory */ + png_free_ptr free_fn; /* function for freeing memory */ +#endif + +/* New member added in libpng-1.0.13 and 1.2.0 */ + png_bytep big_row_buf; /* buffer to save current (unfiltered) row */ + +#ifdef PNG_READ_QUANTIZE_SUPPORTED +/* The following three members were added at version 1.0.14 and 1.2.4 */ + png_bytep quantize_sort; /* working sort array */ + png_bytep index_to_palette; /* where the original index currently is + in the palette */ + png_bytep palette_to_index; /* which original index points to this + palette color */ +#endif + +/* New members added in libpng-1.0.16 and 1.2.6 */ + png_byte compression_type; + +#ifdef PNG_USER_LIMITS_SUPPORTED + png_uint_32 user_width_max; + png_uint_32 user_height_max; + + /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown + * chunks that can be stored (0 means unlimited). + */ + png_uint_32 user_chunk_cache_max; + + /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk + * can occupy when decompressed. 0 means unlimited. + */ + png_alloc_size_t user_chunk_malloc_max; +#endif + +/* New member added in libpng-1.0.25 and 1.2.17 */ +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED + /* Storage for unknown chunk that the library doesn't recognize. */ + png_unknown_chunk unknown_chunk; +#endif + +/* New member added in libpng-1.2.26 */ + png_size_t old_big_row_buf_size; + +/* New member added in libpng-1.2.30 */ + png_charp chunkdata; /* buffer for reading chunk data */ + +#ifdef PNG_IO_STATE_SUPPORTED +/* New member added in libpng-1.4.0 */ + png_uint_32 io_state; +#endif + +/* New member added in libpng-1.5.6 */ + png_bytep big_prev_row; +}; +#endif /* PNGSTRUCT_H */ diff --git a/src/png/pngtest.c b/src/png/pngtest.c index 6317751cae..d38c6972f6 100644 --- a/src/png/pngtest.c +++ b/src/png/pngtest.c @@ -1,8 +1,8 @@ /* pngtest.c - a simple test program to test libpng * - * Last changed in libpng 1.4.1 [February 25, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -31,26 +31,53 @@ * of files at once by typing "pngtest -m file1.png file2.png ..." */ -#include "png.h" -#include "pngpriv.h" +#define _POSIX_SOURCE 1 +#include "zlib.h" +#include "png.h" +/* Copied from pngpriv.h but only used in error messages below. */ +#ifndef PNG_ZBUF_SIZE +# define PNG_ZBUF_SIZE 8192 +#endif # include # include +# include # define FCLOSE(file) fclose(file) #ifndef PNG_STDIO_SUPPORTED - typedef FILE * png_FILE_p; +typedef FILE * png_FILE_p; #endif -/* Makes pngtest verbose so we can find problems (needs to be before png.h) */ +/* Makes pngtest verbose so we can find problems. */ #ifndef PNG_DEBUG # define PNG_DEBUG 0 #endif +#if PNG_DEBUG > 1 +# define pngtest_debug(m) ((void)fprintf(stderr, m "\n")) +# define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1)) +# define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2)) +#else +# define pngtest_debug(m) ((void)0) +# define pngtest_debug1(m,p1) ((void)0) +# define pngtest_debug2(m,p1,p2) ((void)0) +#endif + #if !PNG_DEBUG # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */ #endif +/* The code uses memcmp and memcpy on large objects (typically row pointers) so + * it is necessary to do soemthing special on certain architectures, note that + * the actual support for this was effectively removed in 1.4, so only the + * memory remains in this program: + */ +#define CVT_PTR(ptr) (ptr) +#define CVT_PTR_NOCHECK(ptr) (ptr) +#define png_memcmp memcmp +#define png_memcpy memcpy +#define png_memset memset + /* Turn on CPU timing #define PNGTEST_TIMING */ @@ -71,6 +98,7 @@ static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present"; #endif static int verbose = 0; +static int strict = 0; int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname)); @@ -82,11 +110,6 @@ int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname)); /* #define STDERR stderr */ #define STDERR stdout /* For DOS */ -/* In case a system header (e.g., on AIX) defined jmpbuf */ -#ifdef jmpbuf -# undef jmpbuf -#endif - /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ #ifndef png_jmpbuf # define png_jmpbuf(png_ptr) png_ptr->jmpbuf @@ -97,35 +120,40 @@ static int status_pass = 1; static int status_dots_requested = 0; static int status_dots = 1; -void +void PNGCBAPI read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass); -void +void PNGCBAPI read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) { if (png_ptr == NULL || row_number > PNG_UINT_31_MAX) return; + if (status_pass != pass) { fprintf(stdout, "\n Pass %d: ", pass); status_pass = pass; status_dots = 31; } + status_dots--; + if (status_dots == 0) { fprintf(stdout, "\n "); status_dots=30; } + fprintf(stdout, "r"); } -void +void PNGCBAPI write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass); -void +void PNGCBAPI write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) { if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7) return; + fprintf(stdout, "w"); } @@ -136,9 +164,9 @@ write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) * 5 in case illegal filter values are present.) */ static png_uint_32 filters_used[256]; -void +void PNGCBAPI count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data); -void +void PNGCBAPI count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data) { if (png_ptr != NULL && row_info != NULL) @@ -153,13 +181,14 @@ count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data) static png_uint_32 zero_samples; -void +void PNGCBAPI count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data); -void +void PNGCBAPI count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data) { png_bytep dp = data; - if (png_ptr == NULL)return; + if (png_ptr == NULL) + return; /* Contents of row_info: * png_uint_32 width width of row @@ -176,41 +205,49 @@ count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data) { int pos = 0; png_uint_32 n, nstop; + for (n = 0, nstop=row_info->width; nbit_depth == 1) { if (((*dp << pos++ ) & 0x80) == 0) zero_samples++; + if (pos == 8) { pos = 0; dp++; } } + if (row_info->bit_depth == 2) { if (((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++; + if (pos == 8) { pos = 0; dp++; } } + if (row_info->bit_depth == 4) { if (((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++; + if (pos == 8) { pos = 0; dp++; } } + if (row_info->bit_depth == 8) if (*dp++ == 0) zero_samples++; + if (row_info->bit_depth == 16) { if ((*dp | *(dp+1)) == 0) @@ -233,10 +270,12 @@ count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data) if (row_info->bit_depth == 8) if (*dp++ == 0) zero_samples++; + if (row_info->bit_depth == 16) { if ((*dp | *(dp+1)) == 0) zero_samples++; + dp+=2; } } @@ -263,8 +302,50 @@ static int wrote_question = 0; * than changing the library. */ +#ifdef PNG_IO_STATE_SUPPORTED +void +pngtest_check_io_state(png_structp png_ptr, png_size_t data_length, + png_uint_32 io_op); +void +pngtest_check_io_state(png_structp png_ptr, png_size_t data_length, + png_uint_32 io_op) +{ + png_uint_32 io_state = png_get_io_state(png_ptr); + int err = 0; + + /* Check if the current operation (reading / writing) is as expected. */ + if ((io_state & PNG_IO_MASK_OP) != io_op) + png_error(png_ptr, "Incorrect operation in I/O state"); + + /* Check if the buffer size specific to the current location + * (file signature / header / data / crc) is as expected. + */ + switch (io_state & PNG_IO_MASK_LOC) + { + case PNG_IO_SIGNATURE: + if (data_length > 8) + err = 1; + break; + case PNG_IO_CHUNK_HDR: + if (data_length != 8) + err = 1; + break; + case PNG_IO_CHUNK_DATA: + break; /* no restrictions here */ + case PNG_IO_CHUNK_CRC: + if (data_length != 4) + err = 1; + break; + default: + err = 1; /* uninitialized */ + } + if (err) + png_error(png_ptr, "Bad I/O state or buffer size"); +} +#endif + #ifndef USE_FAR_KEYWORD -static void +static void PNGCBAPI pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check = 0; @@ -281,8 +362,12 @@ pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) if (check != length) { - png_error(png_ptr, "Read Error!"); + png_error(png_ptr, "Read Error"); } + +#ifdef PNG_IO_STATE_SUPPORTED + pngtest_check_io_state(png_ptr, length, PNG_IO_READING); +#endif } #else /* This is the model-independent version. Since the standard I/O library @@ -293,7 +378,7 @@ pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) #define NEAR_BUF_SIZE 1024 #define MIN(a,b) (a <= b ? a : b) -static void +static void PNGCBAPI pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; @@ -313,6 +398,7 @@ pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) png_size_t read, remaining, err; check = 0; remaining = length; + do { read = MIN(NEAR_BUF_SIZE, remaining); @@ -327,17 +413,22 @@ pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) } while (remaining != 0); } + if (check != length) - png_error(png_ptr, "read Error"); + png_error(png_ptr, "Read Error"); + +#ifdef PNG_IO_STATE_SUPPORTED + pngtest_check_io_state(png_ptr, length, PNG_IO_READING); +#endif } #endif /* USE_FAR_KEYWORD */ #ifdef PNG_WRITE_FLUSH_SUPPORTED -static void +static void PNGCBAPI pngtest_flush(png_structp png_ptr) { /* Do nothing; fflush() is said to be just a waste of energy. */ - png_ptr = png_ptr; /* Stifle compiler warning */ + PNG_UNUSED(png_ptr) /* Stifle compiler warning */ } #endif @@ -347,18 +438,21 @@ pngtest_flush(png_structp png_ptr) * than changing the library. */ #ifndef USE_FAR_KEYWORD -static void +static void PNGCBAPI pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; - png_FILE_p io_ptr; - io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr)); - check = fwrite(data, 1, length, io_ptr); + check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr)); + if (check != length) { png_error(png_ptr, "Write Error"); } + +#ifdef PNG_IO_STATE_SUPPORTED + pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING); +#endif } #else /* This is the model-independent version. Since the standard I/O library @@ -369,7 +463,7 @@ pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) #define NEAR_BUF_SIZE 1024 #define MIN(a,b) (a <= b ? a : b) -static void +static void PNGCBAPI pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; @@ -378,17 +472,20 @@ pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) /* Check if data really is near. If so, use usual code. */ near_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); + io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr)); + if ((png_bytep)near_data == data) { check = fwrite(near_data, 1, length, io_ptr); } + else { png_byte buf[NEAR_BUF_SIZE]; png_size_t written, remaining, err; check = 0; remaining = length; + do { written = MIN(NEAR_BUF_SIZE, remaining); @@ -403,10 +500,15 @@ pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) } while (remaining != 0); } + if (check != length) { png_error(png_ptr, "Write Error"); } + +#ifdef PNG_IO_STATE_SUPPORTED + pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING); +#endif } #endif /* USE_FAR_KEYWORD */ @@ -415,14 +517,16 @@ pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) * here if you don't want to. In the default configuration, png_ptr is * not used, but it is passed in case it may be useful. */ -static void +static void PNGCBAPI pngtest_warning(png_structp png_ptr, png_const_charp message) { PNG_CONST char *name = "UNKNOWN (ERROR!)"; char *test; test = png_get_error_ptr(png_ptr); + if (test == NULL) fprintf(STDERR, "%s: libpng warning: %s\n", name, message); + else fprintf(STDERR, "%s: libpng warning: %s\n", test, message); } @@ -432,7 +536,7 @@ pngtest_warning(png_structp png_ptr, png_const_charp message) * function is used by default, or if the program supplies NULL for the * error function pointer in png_set_error_fn(). */ -static void +static void PNGCBAPI pngtest_error(png_structp png_ptr, png_const_charp message) { pngtest_warning(png_ptr, message); @@ -469,12 +573,12 @@ static int maximum_allocation = 0; static int total_allocation = 0; static int num_allocations = 0; -png_voidp png_debug_malloc - PNGARG((png_structp png_ptr, png_alloc_size_t size)); -void png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr)); +png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr, + png_alloc_size_t size)); +void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr)); png_voidp -png_debug_malloc(png_structp png_ptr, png_alloc_size_t size) +PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size) { /* png_malloc has already tested for NULL; png_create_struct calls @@ -496,12 +600,16 @@ png_debug_malloc(png_structp png_ptr, png_alloc_size_t size) current_allocation += size; total_allocation += size; num_allocations ++; + if (current_allocation > maximum_allocation) maximum_allocation = current_allocation; + pinfo->pointer = png_malloc(png_ptr, size); /* Restore malloc_fn and free_fn */ + png_set_mem_fn(png_ptr, NULL, png_debug_malloc, png_debug_free); + if (size != 0 && pinfo->pointer == NULL) { current_allocation -= size; @@ -509,23 +617,27 @@ png_debug_malloc(png_structp png_ptr, png_alloc_size_t size) png_error(png_ptr, "out of memory in pngtest->png_debug_malloc"); } + pinfo->next = pinformation; pinformation = pinfo; /* Make sure the caller isn't assuming zeroed memory. */ png_memset(pinfo->pointer, 0xdd, pinfo->size); + if (verbose) - printf("png_malloc %lu bytes at %x\n", (unsigned long)size, + printf("png_malloc %lu bytes at %p\n", (unsigned long)size, pinfo->pointer); + return (png_voidp)(pinfo->pointer); } } /* Free a pointer. It is removed from the list at the same time. */ -void +void PNGCBAPI png_debug_free(png_structp png_ptr, png_voidp ptr) { if (png_ptr == NULL) fprintf(STDERR, "NULL pointer to png_debug_free.\n"); + if (ptr == 0) { #if 0 /* This happens all the time. */ @@ -537,9 +649,11 @@ png_debug_free(png_structp png_ptr, png_voidp ptr) /* Unlink the element from the list. */ { memory_infop FAR *ppinfo = &pinformation; + for (;;) { memory_infop pinfo = *ppinfo; + if (pinfo->pointer == ptr) { *ppinfo = pinfo->next; @@ -553,18 +667,21 @@ png_debug_free(png_structp png_ptr, png_voidp ptr) pinfo = NULL; break; } + if (pinfo->next == NULL) { fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr); break; } + ppinfo = &pinfo->next; } } /* Finally free the data. */ if (verbose) - printf("Freeing %x\n", ptr); + printf("Freeing %p\n", ptr); + png_free_default(png_ptr, ptr); ptr = NULL; } @@ -586,7 +703,7 @@ static png_uint_32 user_chunk_data[4]; * 3: vpAg units */ -static int read_user_chunk_callback(png_struct *png_ptr, +static int PNGCBAPI read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk) { png_uint_32 @@ -611,8 +728,10 @@ static int read_user_chunk_callback(png_struct *png_ptr, /* Found sTER chunk */ if (chunk->size != 1) return (-1); /* Error return */ + if (chunk->data[0] != 0 && chunk->data[0] != 1) return (-1); /* Invalid mode */ + my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr); my_user_chunk_data[0]=chunk->data[0]+1; return (1); @@ -663,7 +782,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) int bit_depth, color_type; #ifdef PNG_SETJMP_SUPPORTED #ifdef USE_FAR_KEYWORD - jmp_buf jmpbuf; + jmp_buf tmp_jmpbuf; #endif #endif @@ -684,12 +803,11 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) return (1); } - png_debug(0, "Allocating read and write structures"); + pngtest_debug("Allocating read and write structures"); #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL, - NULL, NULL, NULL, - (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free); + NULL, NULL, NULL, png_debug_malloc, png_debug_free); #else read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); @@ -722,7 +840,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) pngtest_warning); #endif #endif - png_debug(0, "Allocating read_info, write_info and end_info structures"); + pngtest_debug("Allocating read_info, write_info and end_info structures"); read_info_ptr = png_create_info_struct(read_ptr); end_info_ptr = png_create_info_struct(read_ptr); #ifdef PNG_WRITE_SUPPORTED @@ -731,9 +849,9 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #endif #ifdef PNG_SETJMP_SUPPORTED - png_debug(0, "Setting jmpbuf for read struct"); + pngtest_debug("Setting jmpbuf for read struct"); #ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) + if (setjmp(tmp_jmpbuf)) #else if (setjmp(png_jmpbuf(read_ptr))) #endif @@ -751,13 +869,14 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) return (1); } #ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(read_ptr), jmpbuf, png_sizeof(jmp_buf)); + png_memcpy(png_jmpbuf(read_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); #endif #ifdef PNG_WRITE_SUPPORTED - png_debug(0, "Setting jmpbuf for write struct"); + pngtest_debug("Setting jmpbuf for write struct"); #ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) + + if (setjmp(tmp_jmpbuf)) #else if (setjmp(png_jmpbuf(write_ptr))) #endif @@ -772,13 +891,14 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) FCLOSE(fpout); return (1); } + #ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(write_ptr), jmpbuf, png_sizeof(jmp_buf)); + png_memcpy(png_jmpbuf(write_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); #endif #endif #endif - png_debug(0, "Initializing input and output streams"); + pngtest_debug("Initializing input and output streams"); #ifdef PNG_STDIO_SUPPORTED png_init_io(read_ptr, fpin); # ifdef PNG_WRITE_SUPPORTED @@ -795,6 +915,15 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) # endif # endif #endif + +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED + /* Normally one would use Z_DEFAULT_STRATEGY for text compression. + * This is here just to make pngtest replicate the results from libpng + * versions prior to 1.5.4, and to test this new API. + */ + png_set_text_compression_strategy(write_ptr, Z_FILTERED); +#endif + if (status_dots_requested == 1) { #ifdef PNG_WRITE_SUPPORTED @@ -802,6 +931,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #endif png_set_read_status_fn(read_ptr, read_row_callback); } + else { #ifdef PNG_WRITE_SUPPORTED @@ -813,8 +943,10 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED { int i; + for (i = 0; i<256; i++) filters_used[i] = 0; + png_set_read_user_transform_fn(read_ptr, count_filters); } #endif @@ -838,10 +970,10 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) NULL, 0); #endif - png_debug(0, "Reading info struct"); + pngtest_debug("Reading info struct"); png_read_info(read_ptr, read_info_ptr); - png_debug(0, "Transferring info struct"); + pngtest_debug("Transferring info struct"); { int interlace_type, compression_type, filter_type; @@ -861,6 +993,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) { png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; + if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y, &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y)) { @@ -883,6 +1016,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) { double white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; + if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y)) { @@ -904,7 +1038,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #ifdef PNG_iCCP_SUPPORTED { png_charp name; - png_charp profile; + png_bytep profile; png_uint_32 proflen; int compression_type; @@ -1028,7 +1162,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0) { - png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks", num_text); + pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text); png_set_text(write_ptr, write_info_ptr, text_ptr, num_text); } } @@ -1048,6 +1182,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) png_memcpy(tIME_string, png_convert_to_rfc1123(read_ptr, mod_time), png_sizeof(tIME_string)); + tIME_string[png_sizeof(tIME_string) - 1] = '\0'; tIME_chunk_present++; #endif /* PNG_TIME_RFC1123_SUPPORTED */ @@ -1079,18 +1214,19 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED { png_unknown_chunkp unknowns; - int num_unknowns = (int)png_get_unknown_chunks(read_ptr, read_info_ptr, + int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr, &unknowns); + if (num_unknowns) { - png_size_t i; + int i; png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns, num_unknowns); /* Copy the locations from the read_info_ptr. The automatically * generated locations in write_info_ptr are wrong because we * haven't written anything yet. */ - for (i = 0; i < (png_size_t)num_unknowns; i++) + for (i = 0; i < num_unknowns; i++) png_set_unknown_chunk_location(write_ptr, write_info_ptr, i, unknowns[i].location); } @@ -1098,7 +1234,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #endif #ifdef PNG_WRITE_SUPPORTED - png_debug(0, "Writing info struct"); + pngtest_debug("Writing info struct"); /* If we wanted, we could write info in two steps: * png_write_info_before_PLTE(write_ptr, write_info_ptr); @@ -1116,9 +1252,11 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) if (verbose) fprintf(STDERR, "\n stereo mode = %lu\n", (unsigned long)(user_chunk_data[0] - 1)); + ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1); png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1); } + if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0) { png_byte png_vpAg[5] = {118, 112, 65, 103, '\0'}; @@ -1131,6 +1269,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) (unsigned long)user_chunk_data[1], (unsigned long)user_chunk_data[2], (unsigned long)user_chunk_data[3]); + png_save_uint_32(vpag_chunk_data, user_chunk_data[1]); png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]); vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff); @@ -1141,12 +1280,13 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #endif #ifdef SINGLE_ROWBUF_ALLOC - png_debug(0, "Allocating row buffer..."); + pngtest_debug("Allocating row buffer..."); row_buf = (png_bytep)png_malloc(read_ptr, png_get_rowbytes(read_ptr, read_info_ptr)); - png_debug1(0, "0x%08lx", (unsigned long)row_buf); + + pngtest_debug1("\t0x%08lx", (unsigned long)row_buf); #endif /* SINGLE_ROWBUF_ALLOC */ - png_debug(0, "Writing row data"); + pngtest_debug("Writing row data"); #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ defined(PNG_WRITE_INTERLACING_SUPPORTED) @@ -1165,15 +1305,17 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #endif for (pass = 0; pass < num_pass; pass++) { - png_debug1(0, "Writing row data for pass %d", pass); + pngtest_debug1("Writing row data for pass %d", pass); for (y = 0; y < height; y++) { #ifndef SINGLE_ROWBUF_ALLOC - png_debug2(0, "Allocating row buffer (pass %d, y = %ld)...", pass, y); + pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y); row_buf = (png_bytep)png_malloc(read_ptr, png_get_rowbytes(read_ptr, read_info_ptr)); - png_debug2(0, "0x%08lx (%ld bytes)", (unsigned long)row_buf, + + pngtest_debug2("\t0x%08lx (%u bytes)", (unsigned long)row_buf, png_get_rowbytes(read_ptr, read_info_ptr)); + #endif /* !SINGLE_ROWBUF_ALLOC */ png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1); @@ -1192,7 +1334,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #endif /* PNG_WRITE_SUPPORTED */ #ifndef SINGLE_ROWBUF_ALLOC - png_debug2(0, "Freeing row buffer (pass %d, y = %ld)", pass, y); + pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y); png_free(read_ptr, row_buf); row_buf = NULL; #endif /* !SINGLE_ROWBUF_ALLOC */ @@ -1206,7 +1348,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1); #endif - png_debug(0, "Reading and writing end_info data"); + pngtest_debug("Reading and writing end_info data"); png_read_end(read_ptr, end_info_ptr); #ifdef PNG_TEXT_SUPPORTED @@ -1216,7 +1358,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0) { - png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks", num_text); + pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text); png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text); } } @@ -1235,6 +1377,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) png_memcpy(tIME_string, png_convert_to_rfc1123(read_ptr, mod_time), png_sizeof(tIME_string)); + tIME_string[png_sizeof(tIME_string) - 1] = '\0'; tIME_chunk_present++; #endif /* PNG_TIME_RFC1123_SUPPORTED */ @@ -1244,19 +1387,19 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED { png_unknown_chunkp unknowns; - int num_unknowns; - num_unknowns = (int)png_get_unknown_chunks(read_ptr, end_info_ptr, + int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr, &unknowns); + if (num_unknowns) { - png_size_t i; + int i; png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns, num_unknowns); /* Copy the locations from the read_info_ptr. The automatically * generated locations in write_end_info_ptr are wrong because we * haven't written the end_info yet. */ - for (i = 0; i < (png_size_t)num_unknowns; i++) + for (i = 0; i < num_unknowns; i++) png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i, unknowns[i].location); } @@ -1277,26 +1420,26 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) } #endif - png_debug(0, "Destroying data structs"); + pngtest_debug("Destroying data structs"); #ifdef SINGLE_ROWBUF_ALLOC - png_debug(1, "destroying row_buf for read_ptr"); + pngtest_debug("destroying row_buf for read_ptr"); png_free(read_ptr, row_buf); row_buf = NULL; #endif /* SINGLE_ROWBUF_ALLOC */ - png_debug(1, "destroying read_ptr, read_info_ptr, end_info_ptr"); + pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr"); png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); #ifdef PNG_WRITE_SUPPORTED - png_debug(1, "destroying write_end_info_ptr"); + pngtest_debug("destroying write_end_info_ptr"); png_destroy_info_struct(write_ptr, &write_end_info_ptr); - png_debug(1, "destroying write_ptr, write_info_ptr"); + pngtest_debug("destroying write_ptr, write_info_ptr"); png_destroy_write_struct(&write_ptr, &write_info_ptr); #endif - png_debug(0, "Destruction complete."); + pngtest_debug("Destruction complete."); FCLOSE(fpin); FCLOSE(fpout); - png_debug(0, "Opening files for comparison"); + pngtest_debug("Opening files for comparison"); if ((fpin = fopen(inname, "rb")) == NULL) { fprintf(STDERR, "Could not find file %s\n", inname); @@ -1321,6 +1464,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) { fprintf(STDERR, "\nFiles %s and %s are of a different size\n", inname, outname); + if (wrote_question == 0) { fprintf(STDERR, @@ -1333,9 +1477,15 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) ZLIB_VERSION); wrote_question = 1; } + FCLOSE(fpin); FCLOSE(fpout); - return (0); + + if (strict != 0) + return (1); + + else + return (0); } if (!num_in) @@ -1344,6 +1494,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) if (png_memcmp(inbuf, outbuf, num_in)) { fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname); + if (wrote_question == 0) { fprintf(STDERR, @@ -1356,9 +1507,15 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) ZLIB_VERSION); wrote_question = 1; } + FCLOSE(fpin); FCLOSE(fpout); - return (0); + + if (strict != 0) + return (1); + + else + return (0); } } @@ -1390,11 +1547,10 @@ main(int argc, char *argv[]) fprintf(STDERR, " library (%lu):%s", (unsigned long)png_access_version_number(), png_get_header_version(NULL)); + /* Show the version of libpng used in building the application */ fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER, PNG_HEADER_VERSION_STRING); - fprintf(STDERR, " sizeof(png_struct)=%ld, sizeof(png_info)=%ld\n", - (long)png_sizeof(png_struct), (long)png_sizeof(png_info)); /* Do some consistency checking on the memory allocation settings, I'm * not sure this matters, but it is nice to know, the first of these @@ -1425,6 +1581,7 @@ main(int argc, char *argv[]) multiple = 1; status_dots_requested = 0; } + else if (strcmp(argv[1], "-mv") == 0 || strcmp(argv[1], "-vm") == 0 ) { @@ -1432,12 +1589,22 @@ main(int argc, char *argv[]) verbose = 1; status_dots_requested = 1; } + else if (strcmp(argv[1], "-v") == 0) { verbose = 1; status_dots_requested = 1; inname = argv[2]; } + + else if (strcmp(argv[1], "--strict") == 0) + { + status_dots_requested = 0; + verbose = 1; + inname = argv[2]; + strict++; + } + else { inname = argv[1]; @@ -1491,9 +1658,11 @@ main(int argc, char *argv[]) #ifdef PNG_TIME_RFC1123_SUPPORTED if (tIME_chunk_present != 0) fprintf(STDERR, " tIME = %s\n", tIME_string); + tIME_chunk_present = 0; #endif /* PNG_TIME_RFC1123_SUPPORTED */ } + else { fprintf(STDERR, " FAIL\n"); @@ -1503,17 +1672,19 @@ main(int argc, char *argv[]) if (allocation_now != current_allocation) fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", current_allocation - allocation_now); + if (current_allocation != 0) { memory_infop pinfo = pinformation; fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", current_allocation); + while (pinfo != NULL) { fprintf(STDERR, " %lu bytes at %x\n", (unsigned long)pinfo->size, - (unsigned int) pinfo->pointer); + (unsigned int)pinfo->pointer); pinfo = pinfo->next; } } @@ -1530,6 +1701,7 @@ main(int argc, char *argv[]) num_allocations); #endif } + else { int i; @@ -1539,11 +1711,17 @@ main(int argc, char *argv[]) #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG int allocation_now = current_allocation; #endif - if (i == 1) status_dots_requested = 1; - else if (verbose == 0)status_dots_requested = 0; + if (i == 1) + status_dots_requested = 1; + + else if (verbose == 0) + status_dots_requested = 0; + if (i == 0 || verbose == 1 || ierror != 0) fprintf(STDERR, "\n Testing %s:", inname); + kerror = test_one_file(inname, outname); + if (kerror == 0) { if (verbose == 1 || i == 2) @@ -1569,10 +1747,12 @@ main(int argc, char *argv[]) #endif /* PNG_TIME_RFC1123_SUPPORTED */ } } + else { if (verbose == 0 && i != 2) fprintf(STDERR, "\n Testing %s:", inname); + fprintf(STDERR, " FAIL\n"); ierror += kerror; } @@ -1580,12 +1760,14 @@ main(int argc, char *argv[]) if (allocation_now != current_allocation) fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", current_allocation - allocation_now); + if (current_allocation != 0) { memory_infop pinfo = pinformation; fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", current_allocation); + while (pinfo != NULL) { fprintf(STDERR, " %lu bytes at %x\n", @@ -1623,10 +1805,12 @@ main(int argc, char *argv[]) if (ierror == 0) fprintf(STDERR, " libpng passes test\n"); + else fprintf(STDERR, " libpng FAILS test\n"); + return (int)(ierror != 0); } /* Generate a compiler error if there is an old png.h in the search path. */ -typedef version_1_4_4 your_png_h_is_not_version_1_4_4; +typedef png_libpng_version_1_5_6 Your_png_h_is_not_version_1_5_6; diff --git a/src/png/pngtest.png b/src/png/pngtest.png index cfdd36f28b2ac260392b6ebddc30a1f13cc40982..81f5f8438a9f0fa8b87cd0266334f72792febf8f 100644 GIT binary patch delta 138 zcmZ4B{M~ti2^V8=kh>G(&67Iy6Agtm6_P!Id>I(3)EF2VS{N99F#zco3=E|P3=FRl z7#OT(FffQ0%-I!aGtp6s_y7O@-+&548247ao-#4RT3V>s+0lp5$k@cp+*Q}oh{4#< p#L&#u>`6WE_Kge76__|?PQIzIU7$tQ?io-YgQu&X%Q~loCIGgQD^~yj delta 68 zcmezFyuf*a2`@{rlV=Dk5cn?D{Wh^mikATj7}x5yMNC|1z44cc0#n7D$p(ts1-=&_ P1transformations |= PNG_BGR; } #endif @@ -38,6 +38,7 @@ png_set_swap(png_structp png_ptr) if (png_ptr == NULL) return; + if (png_ptr->bit_depth == 16) png_ptr->transformations |= PNG_SWAP_BYTES; } @@ -52,6 +53,7 @@ png_set_packing(png_structp png_ptr) if (png_ptr == NULL) return; + if (png_ptr->bit_depth < 8) { png_ptr->transformations |= PNG_PACK; @@ -69,6 +71,7 @@ png_set_packswap(png_structp png_ptr) if (png_ptr == NULL) return; + if (png_ptr->bit_depth < 8) png_ptr->transformations |= PNG_PACKSWAP; } @@ -76,12 +79,13 @@ png_set_packswap(png_structp png_ptr) #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) void PNGAPI -png_set_shift(png_structp png_ptr, png_color_8p true_bits) +png_set_shift(png_structp png_ptr, png_const_color_8p true_bits) { png_debug(1, "in png_set_shift"); if (png_ptr == NULL) return; + png_ptr->transformations |= PNG_SHIFT; png_ptr->shift = *true_bits; } @@ -117,10 +121,13 @@ png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc) if (png_ptr == NULL) return; + png_ptr->transformations |= PNG_FILLER; png_ptr->filler = (png_uint_16)filler; + if (filler_loc == PNG_FILLER_AFTER) png_ptr->flags |= PNG_FLAG_FILLER_AFTER; + else png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER; @@ -135,7 +142,7 @@ png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc) } /* Also I added this in libpng-1.0.2a (what happens when we expand - * a less-than-8-bit grayscale to GA? */ + * a less-than-8-bit grayscale to GA?) */ if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8) { @@ -151,6 +158,7 @@ png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc) if (png_ptr == NULL) return; + png_set_filler(png_ptr, filler, filler_loc); png_ptr->transformations |= PNG_ADD_ALPHA; } @@ -166,6 +174,7 @@ png_set_swap_alpha(png_structp png_ptr) if (png_ptr == NULL) return; + png_ptr->transformations |= PNG_SWAP_ALPHA; } #endif @@ -179,6 +188,7 @@ png_set_invert_alpha(png_structp png_ptr) if (png_ptr == NULL) return; + png_ptr->transformations |= PNG_INVERT_ALPHA; } #endif @@ -191,6 +201,7 @@ png_set_invert_mono(png_structp png_ptr) if (png_ptr == NULL) return; + png_ptr->transformations |= PNG_INVERT_MONO; } @@ -206,8 +217,8 @@ png_do_invert(png_row_infop row_info, png_bytep row) if (row_info->color_type == PNG_COLOR_TYPE_GRAY) { png_bytep rp = row; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; + png_size_t i; + png_size_t istop = row_info->rowbytes; for (i = 0; i < istop; i++) { @@ -215,36 +226,41 @@ png_do_invert(png_row_infop row_info, png_bytep row) rp++; } } + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA && row_info->bit_depth == 8) { png_bytep rp = row; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; + png_size_t i; + png_size_t istop = row_info->rowbytes; - for (i = 0; i < istop; i+=2) + for (i = 0; i < istop; i += 2) { *rp = (png_byte)(~(*rp)); - rp+=2; + rp += 2; } } + +#ifdef PNG_16BIT_SUPPORTED else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA && row_info->bit_depth == 16) { png_bytep rp = row; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; + png_size_t i; + png_size_t istop = row_info->rowbytes; - for (i = 0; i < istop; i+=4) + for (i = 0; i < istop; i += 4) { *rp = (png_byte)(~(*rp)); - *(rp+1) = (png_byte)(~(*(rp+1))); - rp+=4; + *(rp + 1) = (png_byte)(~(*(rp + 1))); + rp += 4; } } +#endif } #endif +#ifdef PNG_16BIT_SUPPORTED #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) /* Swaps byte order on 16 bit depth images */ void /* PRIVATE */ @@ -252,8 +268,7 @@ png_do_swap(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_swap"); - if ( - row_info->bit_depth == 16) + if (row_info->bit_depth == 16) { png_bytep rp = row; png_uint_32 i; @@ -268,6 +283,7 @@ png_do_swap(png_row_infop row_info, png_bytep row) } } #endif +#endif #if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED) static PNG_CONST png_byte onebppswaptable[256] = { @@ -381,19 +397,22 @@ png_do_packswap(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_packswap"); - if ( - row_info->bit_depth < 8) + if (row_info->bit_depth < 8) { - png_bytep rp, end, table; + png_bytep rp; + png_const_bytep end, table; end = row + row_info->rowbytes; if (row_info->bit_depth == 1) - table = (png_bytep)onebppswaptable; + table = onebppswaptable; + else if (row_info->bit_depth == 2) - table = (png_bytep)twobppswaptable; + table = twobppswaptable; + else if (row_info->bit_depth == 4) - table = (png_bytep)fourbppswaptable; + table = fourbppswaptable; + else return; @@ -405,158 +424,119 @@ png_do_packswap(png_row_infop row_info, png_bytep row) #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -/* Remove filler or alpha byte(s) */ +/* Remove a channel - this used to be 'png_do_strip_filler' but it used a + * somewhat weird combination of flags to determine what to do. All the calls + * to png_do_strip_filler are changed in 1.5.2 to call this instead with the + * correct arguments. + * + * The routine isn't general - the channel must be the channel at the start or + * end (not in the middle) of each pixel. + */ void /* PRIVATE */ -png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags) +png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start) { - png_debug(1, "in png_do_strip_filler"); - + png_bytep sp = row; /* source pointer */ + png_bytep dp = row; /* destination pointer */ + png_bytep ep = row + row_info->rowbytes; /* One beyond end of row */ + + /* At the start sp will point to the first byte to copy and dp to where + * it is copied to. ep always points just beyond the end of the row, so + * the loop simply copies (channels-1) channels until sp reaches ep. + * + * at_start: 0 -- convert AG, XG, ARGB, XRGB, AAGG, XXGG, etc. + * nonzero -- convert GA, GX, RGBA, RGBX, GGAA, RRGGBBXX, etc. + */ + + /* GA, GX, XG cases */ + if (row_info->channels == 2) { - png_bytep sp=row; - png_bytep dp=row; - png_uint_32 row_width=row_info->width; - png_uint_32 i; + if (row_info->bit_depth == 8) + { + if (at_start) /* Skip initial filler */ + ++sp; + else /* Skip initial channel and, for sp, the filler */ + sp += 2, ++dp; + + /* For a 1 pixel wide image there is nothing to do */ + while (sp < ep) + *dp++ = *sp, sp += 2; - if ((row_info->color_type == PNG_COLOR_TYPE_RGB || - (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA && - (flags & PNG_FLAG_STRIP_ALPHA))) && - row_info->channels == 4) + row_info->pixel_depth = 8; + } + + else if (row_info->bit_depth == 16) { - if (row_info->bit_depth == 8) - { - /* This converts from RGBX or RGBA to RGB */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - dp+=3; sp+=4; - for (i = 1; i < row_width; i++) - { - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - sp++; - } - } - /* This converts from XRGB or ARGB to RGB */ - else - { - for (i = 0; i < row_width; i++) - { - sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 24; - row_info->rowbytes = row_width * 3; - } - else /* if (row_info->bit_depth == 16) */ - { - if (flags & PNG_FLAG_FILLER_AFTER) - { - /* This converts from RRGGBBXX or RRGGBBAA to RRGGBB */ - sp += 8; dp += 6; - for (i = 1; i < row_width; i++) - { - /* This could be (although png_memcpy is probably slower): - png_memcpy(dp, sp, 6); - sp += 8; - dp += 6; - */ - - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - sp += 2; - } - } - else - { - /* This converts from XXRRGGBB or AARRGGBB to RRGGBB */ - for (i = 0; i < row_width; i++) - { - /* This could be (although png_memcpy is probably slower): - png_memcpy(dp, sp, 6); - sp += 8; - dp += 6; - */ - - sp+=2; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 48; - row_info->rowbytes = row_width * 6; - } - row_info->channels = 3; + if (at_start) /* Skip initial filler */ + sp += 2; + else /* Skip initial channel and, for sp, the filler */ + sp += 4, dp += 2; + + while (sp < ep) + *dp++ = *sp++, *dp++ = *sp, sp += 3; + + row_info->pixel_depth = 16; + } + + else + return; /* bad bit depth */ + + row_info->channels = 1; + + /* Finally fix the color type if it records an alpha channel */ + if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + row_info->color_type = PNG_COLOR_TYPE_GRAY; + } + + /* RGBA, RGBX, XRGB cases */ + else if (row_info->channels == 4) + { + if (row_info->bit_depth == 8) + { + if (at_start) /* Skip initial filler */ + ++sp; + else /* Skip initial channels and, for sp, the filler */ + sp += 4, dp += 3; + + /* Note that the loop adds 3 to dp and 4 to sp each time. */ + while (sp < ep) + *dp++ = *sp++, *dp++ = *sp++, *dp++ = *sp, sp += 2; + + row_info->pixel_depth = 24; } - else if ((row_info->color_type == PNG_COLOR_TYPE_GRAY || - (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA && - (flags & PNG_FLAG_STRIP_ALPHA))) && - row_info->channels == 2) + + else if (row_info->bit_depth == 16) { - if (row_info->bit_depth == 8) - { - /* This converts from GX or GA to G */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - for (i = 0; i < row_width; i++) - { - *dp++ = *sp++; - sp++; - } - } - /* This converts from XG or AG to G */ - else - { - for (i = 0; i < row_width; i++) - { - sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 8; - row_info->rowbytes = row_width; - } - else /* if (row_info->bit_depth == 16) */ + if (at_start) /* Skip initial filler */ + sp += 2; + else /* Skip initial channels and, for sp, the filler */ + sp += 8, dp += 6; + + while (sp < ep) { - if (flags & PNG_FLAG_FILLER_AFTER) - { - /* This converts from GGXX or GGAA to GG */ - sp += 4; dp += 2; - for (i = 1; i < row_width; i++) - { - *dp++ = *sp++; - *dp++ = *sp++; - sp += 2; - } - } - else - { - /* This converts from XXGG or AAGG to GG */ - for (i = 0; i < row_width; i++) - { - sp += 2; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 16; - row_info->rowbytes = row_width * 2; + /* Copy 6 bytes, skip 2 */ + *dp++ = *sp++, *dp++ = *sp++; + *dp++ = *sp++, *dp++ = *sp++; + *dp++ = *sp++, *dp++ = *sp, sp += 3; } - row_info->channels = 1; + + row_info->pixel_depth = 48; } - if (flags & PNG_FLAG_STRIP_ALPHA) - row_info->color_type &= ~PNG_COLOR_MASK_ALPHA; + + else + return; /* bad bit depth */ + + row_info->channels = 3; + + /* Finally fix the color type if it records an alpha channel */ + if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + row_info->color_type = PNG_COLOR_TYPE_RGB; } + + else + return; /* The filler channel has gone already */ + + /* Fix the rowbytes value. */ + row_info->rowbytes = dp-row; } #endif @@ -567,8 +547,7 @@ png_do_bgr(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_bgr"); - if ( - (row_info->color_type & PNG_COLOR_MASK_COLOR)) + if ((row_info->color_type & PNG_COLOR_MASK_COLOR)) { png_uint_32 row_width = row_info->width; if (row_info->bit_depth == 8) @@ -585,6 +564,7 @@ png_do_bgr(png_row_infop row_info, png_bytep row) *(rp + 2) = save; } } + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { png_bytep rp; @@ -598,6 +578,8 @@ png_do_bgr(png_row_infop row_info, png_bytep row) } } } + +#ifdef PNG_16BIT_SUPPORTED else if (row_info->bit_depth == 16) { if (row_info->color_type == PNG_COLOR_TYPE_RGB) @@ -615,6 +597,7 @@ png_do_bgr(png_row_infop row_info, png_bytep row) *(rp + 5) = save; } } + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { png_bytep rp; @@ -631,12 +614,14 @@ png_do_bgr(png_row_infop row_info, png_bytep row) } } } +#endif } } #endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */ #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED void PNGAPI png_set_user_transform_info(png_structp png_ptr, png_voidp user_transform_ptr, int user_transform_depth, int user_transform_channels) @@ -645,33 +630,49 @@ png_set_user_transform_info(png_structp png_ptr, png_voidp if (png_ptr == NULL) return; -#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED png_ptr->user_transform_ptr = user_transform_ptr; png_ptr->user_transform_depth = (png_byte)user_transform_depth; png_ptr->user_transform_channels = (png_byte)user_transform_channels; -#else - if (user_transform_ptr || user_transform_depth || user_transform_channels) - png_warning(png_ptr, - "This version of libpng does not support user transform info"); -#endif } +#endif /* This function returns a pointer to the user_transform_ptr associated with * the user transform functions. The application should free any memory * associated with this pointer before png_write_destroy and png_read_destroy * are called. */ +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED png_voidp PNGAPI -png_get_user_transform_ptr(png_structp png_ptr) +png_get_user_transform_ptr(png_const_structp png_ptr) { if (png_ptr == NULL) return (NULL); -#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED + return ((png_voidp)png_ptr->user_transform_ptr); -#else - return (NULL); +} #endif + +#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED +png_uint_32 PNGAPI +png_get_current_row_number(png_const_structp png_ptr) +{ + /* See the comments in png.h - this is the sub-image row when reading and + * interlaced image. + */ + if (png_ptr != NULL) + return png_ptr->row_number; + + return PNG_UINT_32_MAX; /* help the app not to fail silently */ +} + +png_byte PNGAPI +png_get_current_pass_number(png_const_structp png_ptr) +{ + if (png_ptr != NULL) + return png_ptr->pass; + return 8; /* invalid */ } +#endif /* PNG_USER_TRANSFORM_INFO_SUPPORTED */ #endif /* PNG_READ_USER_TRANSFORM_SUPPORTED || PNG_WRITE_USER_TRANSFORM_SUPPORTED */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/src/png/pngvalid.c b/src/png/pngvalid.c new file mode 100644 index 0000000000..bc48c04693 --- /dev/null +++ b/src/png/pngvalid.c @@ -0,0 +1,9697 @@ + +/* pngvalid.c - validate libpng by constructing then reading png files. + * + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 2011 Glenn Randers-Pehrson + * Written by John Cunningham Bowler + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * NOTES: + * This is a C program that is intended to be linked against libpng. It + * generates bitmaps internally, stores them as PNG files (using the + * sequential write code) then reads them back (using the sequential + * read code) and validates that the result has the correct data. + * + * The program can be modified and extended to test the correctness of + * transformations performed by libpng. + */ + +#define _POSIX_SOURCE 1 + +#include "png.h" +#if PNG_LIBPNG_VER < 10500 +/* This delibarately lacks the PNG_CONST. */ +typedef png_byte *png_const_bytep; + +/* This is copied from 1.5.1 png.h: */ +#define PNG_INTERLACE_ADAM7_PASSES 7 +#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7) +#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7) +#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) +#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) +#define PNG_PASS_ROWS(height, pass) (((height)+(((1<>PNG_PASS_ROW_SHIFT(pass)) +#define PNG_PASS_COLS(width, pass) (((width)+(((1<>PNG_PASS_COL_SHIFT(pass)) +#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ + (((yIn)<>(((7-(off))-(pass))<<2)) & 0xFU) | \ + ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U)) +#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ + ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) +#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ + ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) + +/* These are needed too for the default build: */ +#define PNG_WRITE_16BIT_SUPPORTED +#define PNG_READ_16BIT_SUPPORTED + +/* This comes from pnglibconf.h afer 1.5: */ +#define PNG_FP_1 100000 +#define PNG_GAMMA_THRESHOLD_FIXED\ + ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1)) +#endif + +#include "zlib.h" /* For crc32 */ + +#include /* For floating point constants */ +#include /* For malloc */ +#include /* For memcpy, memset */ +#include /* For floor */ + +/* Unused formal parameter errors are removed using the following macro which is + * expected to have no bad effects on performance. + */ +#ifndef UNUSED +# if defined(__GNUC__) || defined(_MSC_VER) +# define UNUSED(param) (void)param; +# else +# define UNUSED(param) +# endif +#endif + +/***************************** EXCEPTION HANDLING *****************************/ +#include "contrib/visupng/cexcept.h" + +#ifdef __cplusplus +# define this not_the_cpp_this +# define new not_the_cpp_new +# define voidcast(type, value) static_cast(value) +#else +# define voidcast(type, value) (value) +#endif /* __cplusplus */ + +struct png_store; +define_exception_type(struct png_store*); + +/* The following are macros to reduce typing everywhere where the well known + * name 'the_exception_context' must be defined. + */ +#define anon_context(ps) struct exception_context *the_exception_context = \ + &(ps)->exception_context +#define context(ps,fault) anon_context(ps); png_store *fault + +/******************************* UTILITIES ************************************/ +/* Error handling is particularly problematic in production code - error + * handlers often themselves have bugs which lead to programs that detect + * minor errors crashing. The following functions deal with one very + * common class of errors in error handlers - attempting to format error or + * warning messages into buffers that are too small. + */ +static size_t safecat(char *buffer, size_t bufsize, size_t pos, + PNG_CONST char *cat) +{ + while (pos < bufsize && cat != NULL && *cat != 0) + buffer[pos++] = *cat++; + + if (pos >= bufsize) + pos = bufsize-1; + + buffer[pos] = 0; + return pos; +} + +static size_t safecatn(char *buffer, size_t bufsize, size_t pos, int n) +{ + char number[64]; + sprintf(number, "%d", n); + return safecat(buffer, bufsize, pos, number); +} + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +static size_t safecatd(char *buffer, size_t bufsize, size_t pos, double d, + int precision) +{ + char number[64]; + sprintf(number, "%.*f", precision, d); + return safecat(buffer, bufsize, pos, number); +} +#endif + +static PNG_CONST char invalid[] = "invalid"; +static PNG_CONST char sep[] = ": "; + +static PNG_CONST char *colour_types[8] = +{ + "grayscale", invalid, "truecolour", "indexed-colour", + "grayscale with alpha", invalid, "truecolour with alpha", invalid +}; + +/* Convert a double precision value to fixed point. */ +static png_fixed_point +fix(double d) +{ + d = floor(d * PNG_FP_1 + .5); + return (png_fixed_point)d; +} + +/* Generate random bytes. This uses a boring repeatable algorithm and it + * is implemented here so that it gives the same set of numbers on every + * architecture. It's a linear congruential generator (Knuth or Sedgewick + * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and + * Hill, "The Art of Electronics". + */ +static void +make_random_bytes(png_uint_32* seed, void* pv, size_t size) +{ + png_uint_32 u0 = seed[0], u1 = seed[1]; + png_bytep bytes = voidcast(png_bytep, pv); + + /* There are thirty three bits, the next bit in the sequence is bit-33 XOR + * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. + */ + size_t i; + for (i=0; i> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; + u1 <<= 8; + u1 |= u0 >> 24; + u0 <<= 8; + u0 |= u; + *bytes++ = (png_byte)u; + } + + seed[0] = u0; + seed[1] = u1; +} + +static void +make_four_random_bytes(png_uint_32* seed, png_bytep bytes) +{ + make_random_bytes(seed, bytes, 4); +} + +static void +randomize(void *pv, size_t size) +{ + static png_uint_32 random_seed[2] = {0x56789abc, 0xd}; + make_random_bytes(random_seed, pv, size); +} + +#define RANDOMIZE(this) randomize(&(this), sizeof (this)) + +static unsigned int +random_mod(unsigned int max) +{ + unsigned int x; + + RANDOMIZE(x); + + return x % max; /* 0 .. max-1 */ +} + +static int +random_choice(void) +{ + unsigned char x; + + RANDOMIZE(x); + + return x & 1; +} + +/* A numeric ID based on PNG file characteristics. The 'do_interlace' field + * simply records whether pngvalid did the interlace itself or whether it + * was done by libpng. Width and height must be less than 256. 'palette' is an + * index of the palette to use for formats with a palette (0 otherwise.) + */ +#define FILEID(col, depth, palette, interlace, width, height, do_interlace) \ + ((png_uint_32)((col) + ((depth)<<3) + ((palette)<<8) + ((interlace)<<13) + \ + (((do_interlace)!=0)<<15) + ((width)<<16) + ((height)<<24))) + +#define COL_FROM_ID(id) ((png_byte)((id)& 0x7U)) +#define DEPTH_FROM_ID(id) ((png_byte)(((id) >> 3) & 0x1fU)) +#define PALETTE_FROM_ID(id) ((int)(((id) >> 8) & 0x1f)) +#define INTERLACE_FROM_ID(id) ((int)(((id) >> 13) & 0x3)) +#define DO_INTERLACE_FROM_ID(id) ((int)(((id)>>15) & 1)) +#define WIDTH_FROM_ID(id) (((id)>>16) & 0xff) +#define HEIGHT_FROM_ID(id) (((id)>>24) & 0xff) + +/* Utility to construct a standard name for a standard image. */ +static size_t +standard_name(char *buffer, size_t bufsize, size_t pos, png_byte colour_type, + int bit_depth, int npalette, int interlace_type, + png_uint_32 w, png_uint_32 h, int do_interlace) +{ + pos = safecat(buffer, bufsize, pos, colour_types[colour_type]); + if (npalette > 0) + { + pos = safecat(buffer, bufsize, pos, "["); + pos = safecatn(buffer, bufsize, pos, npalette); + pos = safecat(buffer, bufsize, pos, "]"); + } + pos = safecat(buffer, bufsize, pos, " "); + pos = safecatn(buffer, bufsize, pos, bit_depth); + pos = safecat(buffer, bufsize, pos, " bit"); + + if (interlace_type != PNG_INTERLACE_NONE) + { + pos = safecat(buffer, bufsize, pos, " interlaced"); + if (do_interlace) + pos = safecat(buffer, bufsize, pos, "(pngvalid)"); + else + pos = safecat(buffer, bufsize, pos, "(libpng)"); + } + + if (w > 0 || h > 0) + { + pos = safecat(buffer, bufsize, pos, " "); + pos = safecatn(buffer, bufsize, pos, w); + pos = safecat(buffer, bufsize, pos, "x"); + pos = safecatn(buffer, bufsize, pos, h); + } + + return pos; +} + +static size_t +standard_name_from_id(char *buffer, size_t bufsize, size_t pos, png_uint_32 id) +{ + return standard_name(buffer, bufsize, pos, COL_FROM_ID(id), + DEPTH_FROM_ID(id), PALETTE_FROM_ID(id), INTERLACE_FROM_ID(id), + WIDTH_FROM_ID(id), HEIGHT_FROM_ID(id), DO_INTERLACE_FROM_ID(id)); +} + +/* Convenience API and defines to list valid formats. Note that 16 bit read and + * write support is required to do 16 bit read tests (we must be able to make a + * 16 bit image to test!) + */ +#ifdef PNG_WRITE_16BIT_SUPPORTED +# define WRITE_BDHI 4 +# ifdef PNG_READ_16BIT_SUPPORTED +# define READ_BDHI 4 +# define DO_16BIT +# endif +#else +# define WRITE_BDHI 3 +#endif +#ifndef DO_16BIT +# define READ_BDHI 3 +#endif + +/* The following defines the number of different palettes to generate for + * each log bit depth of a colour type 3 standard image. + */ +#define PALETTE_COUNT(bit_depth) ((bit_depth) > 4 ? 1 : 16) + +static int +next_format(png_bytep colour_type, png_bytep bit_depth, int* palette_number) +{ + if (*bit_depth == 0) + { + *colour_type = 0, *bit_depth = 1, *palette_number = 0; + return 1; + } + + if (*colour_type == 3) + { + /* Add multiple palettes for colour type 3. */ + if (++*palette_number < PALETTE_COUNT(*bit_depth)) + return 1; + + *palette_number = 0; + } + + *bit_depth = (png_byte)(*bit_depth << 1); + + /* Palette images are restricted to 8 bit depth */ + if (*bit_depth <= 8 +# ifdef DO_16BIT + || (*colour_type != 3 && *bit_depth <= 16) +# endif + ) + return 1; + + /* Move to the next color type, or return 0 at the end. */ + switch (*colour_type) + { + case 0: + *colour_type = 2; + *bit_depth = 8; + return 1; + + case 2: + *colour_type = 3; + *bit_depth = 1; + return 1; + + case 3: + *colour_type = 4; + *bit_depth = 8; + return 1; + + case 4: + *colour_type = 6; + *bit_depth = 8; + return 1; + + default: + return 0; + } +} + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +static unsigned int +sample(png_const_bytep row, png_byte colour_type, png_byte bit_depth, + png_uint_32 x, unsigned int sample_index) +{ + png_uint_32 bit_index, result; + + /* Find a sample index for the desired sample: */ + x *= bit_depth; + bit_index = x; + + if ((colour_type & 1) == 0) /* !palette */ + { + if (colour_type & 2) + bit_index *= 3; + + if (colour_type & 4) + bit_index += x; /* Alpha channel */ + + /* Multiple channels; select one: */ + if (colour_type & (2+4)) + bit_index += sample_index * bit_depth; + } + + /* Return the sample from the row as an integer. */ + row += bit_index >> 3; + result = *row; + + if (bit_depth == 8) + return result; + + else if (bit_depth > 8) + return (result << 8) + *++row; + + /* Less than 8 bits per sample. */ + bit_index &= 7; + return (result >> (8-bit_index-bit_depth)) & ((1U<> 3] & ~destMask; + unsigned int sourceByte = fromBuffer[fromIndex >> 3]; + + /* Don't rely on << or >> supporting '0' here, just in case: */ + fromIndex &= 7; + if (fromIndex > 0) sourceByte <<= fromIndex; + if ((toIndex & 7) > 0) sourceByte >>= toIndex & 7; + + toBuffer[toIndex >> 3] = (png_byte)(destByte | (sourceByte & destMask)); + } + else /* One or more bytes */ + memmove(toBuffer+(toIndex>>3), fromBuffer+(fromIndex>>3), pixelSize>>3); +} + +/* Copy a complete row of pixels, taking into account potential partial + * bytes at the end. + */ +static void +row_copy(png_bytep toBuffer, png_const_bytep fromBuffer, unsigned int bitWidth) +{ + memcpy(toBuffer, fromBuffer, bitWidth >> 3); + + if ((bitWidth & 7) != 0) + { + unsigned int mask; + + toBuffer += bitWidth >> 3; + fromBuffer += bitWidth >> 3; + /* The remaining bits are in the top of the byte, the mask is the bits to + * retain. + */ + mask = 0xff >> (bitWidth & 7); + *toBuffer = (png_byte)((*toBuffer & mask) | (*fromBuffer & ~mask)); + } +} + +/* Compare pixels - they are assumed to start at the first byte in the + * given buffers. + */ +static int +pixel_cmp(png_const_bytep pa, png_const_bytep pb, png_uint_32 bit_width) +{ +#if PNG_LIBPNG_VER < 10506 + if (memcmp(pa, pb, bit_width>>3) == 0) + { + png_uint_32 p; + + if ((bit_width & 7) == 0) return 0; + + /* Ok, any differences? */ + p = pa[bit_width >> 3]; + p ^= pb[bit_width >> 3]; + + if (p == 0) return 0; + + /* There are, but they may not be significant, remove the bits + * after the end (the low order bits in PNG.) + */ + bit_width &= 7; + p >>= 8-bit_width; + + if (p == 0) return 0; + } +#else + /* From libpng-1.5.6 the overwrite should be fixed, so compare the trailing + * bits too: + */ + if (memcmp(pa, pb, (bit_width+7)>>3) == 0) + return 0; +#endif + + /* Return the index of the changed byte. */ + { + png_uint_32 where = 0; + + while (pa[where] == pb[where]) ++where; + return 1+where; + } +} + +/*************************** BASIC PNG FILE WRITING ***************************/ +/* A png_store takes data from the sequential writer or provides data + * to the sequential reader. It can also store the result of a PNG + * write for later retrieval. + */ +#define STORE_BUFFER_SIZE 500 /* arbitrary */ +typedef struct png_store_buffer +{ + struct png_store_buffer* prev; /* NOTE: stored in reverse order */ + png_byte buffer[STORE_BUFFER_SIZE]; +} png_store_buffer; + +#define FILE_NAME_SIZE 64 + +typedef struct store_palette_entry /* record of a single palette entry */ +{ + png_byte red; + png_byte green; + png_byte blue; + png_byte alpha; +} store_palette_entry, store_palette[256]; + +typedef struct png_store_file +{ + struct png_store_file* next; /* as many as you like... */ + char name[FILE_NAME_SIZE]; + png_uint_32 id; /* must be correct (see FILEID) */ + png_size_t datacount; /* In this (the last) buffer */ + png_store_buffer data; /* Last buffer in file */ + int npalette; /* Number of entries in palette */ + store_palette_entry* palette; /* May be NULL */ +} png_store_file; + +/* The following is a pool of memory allocated by a single libpng read or write + * operation. + */ +typedef struct store_pool +{ + struct png_store *store; /* Back pointer */ + struct store_memory *list; /* List of allocated memory */ + png_byte mark[4]; /* Before and after data */ + + /* Statistics for this run. */ + png_alloc_size_t max; /* Maximum single allocation */ + png_alloc_size_t current; /* Current allocation */ + png_alloc_size_t limit; /* Highest current allocation */ + png_alloc_size_t total; /* Total allocation */ + + /* Overall statistics (retained across successive runs). */ + png_alloc_size_t max_max; + png_alloc_size_t max_limit; + png_alloc_size_t max_total; +} store_pool; + +typedef struct png_store +{ + /* For cexcept.h exception handling - simply store one of these; + * the context is a self pointer but it may point to a different + * png_store (in fact it never does in this program.) + */ + struct exception_context + exception_context; + + unsigned int verbose :1; + unsigned int treat_warnings_as_errors :1; + unsigned int expect_error :1; + unsigned int expect_warning :1; + unsigned int saw_warning :1; + unsigned int speed :1; + unsigned int progressive :1; /* use progressive read */ + unsigned int validated :1; /* used as a temporary flag */ + int nerrors; + int nwarnings; + char test[128]; /* Name of test */ + char error[256]; + + /* Read fields */ + png_structp pread; /* Used to read a saved file */ + png_infop piread; + png_store_file* current; /* Set when reading */ + png_store_buffer* next; /* Set when reading */ + png_size_t readpos; /* Position in *next */ + png_byte* image; /* Buffer for reading interlaced images */ + png_size_t cb_image; /* Size of this buffer */ + png_size_t cb_row; /* Row size of the image(s) */ + png_uint_32 image_h; /* Number of rows in a single image */ + store_pool read_memory_pool; + + /* Write fields */ + png_store_file* saved; + png_structp pwrite; /* Used when writing a new file */ + png_infop piwrite; + png_size_t writepos; /* Position in .new */ + char wname[FILE_NAME_SIZE]; + png_store_buffer new; /* The end of the new PNG file being written. */ + store_pool write_memory_pool; + store_palette_entry* palette; + int npalette; +} png_store; + +/* Initialization and cleanup */ +static void +store_pool_mark(png_bytep mark) +{ + static png_uint_32 store_seed[2] = { 0x12345678, 1}; + + make_four_random_bytes(store_seed, mark); +} + +/* Use this for random 32 bit values; this function makes sure the result is + * non-zero. + */ +static png_uint_32 +random_32(void) +{ + + for(;;) + { + png_byte mark[4]; + png_uint_32 result; + + store_pool_mark(mark); + result = png_get_uint_32(mark); + + if (result != 0) + return result; + } +} + +static void +store_pool_init(png_store *ps, store_pool *pool) +{ + memset(pool, 0, sizeof *pool); + + pool->store = ps; + pool->list = NULL; + pool->max = pool->current = pool->limit = pool->total = 0; + pool->max_max = pool->max_limit = pool->max_total = 0; + store_pool_mark(pool->mark); +} + +static void +store_init(png_store* ps) +{ + memset(ps, 0, sizeof *ps); + init_exception_context(&ps->exception_context); + store_pool_init(ps, &ps->read_memory_pool); + store_pool_init(ps, &ps->write_memory_pool); + ps->verbose = 0; + ps->treat_warnings_as_errors = 0; + ps->expect_error = 0; + ps->expect_warning = 0; + ps->saw_warning = 0; + ps->speed = 0; + ps->progressive = 0; + ps->validated = 0; + ps->nerrors = ps->nwarnings = 0; + ps->pread = NULL; + ps->piread = NULL; + ps->saved = ps->current = NULL; + ps->next = NULL; + ps->readpos = 0; + ps->image = NULL; + ps->cb_image = 0; + ps->cb_row = 0; + ps->image_h = 0; + ps->pwrite = NULL; + ps->piwrite = NULL; + ps->writepos = 0; + ps->new.prev = NULL; + ps->palette = NULL; + ps->npalette = 0; +} + +static void +store_freebuffer(png_store_buffer* psb) +{ + if (psb->prev) + { + store_freebuffer(psb->prev); + free(psb->prev); + psb->prev = NULL; + } +} + +static void +store_freenew(png_store *ps) +{ + store_freebuffer(&ps->new); + ps->writepos = 0; + if (ps->palette != NULL) + { + free(ps->palette); + ps->palette = NULL; + ps->npalette = 0; + } +} + +static void +store_storenew(png_store *ps) +{ + png_store_buffer *pb; + + if (ps->writepos != STORE_BUFFER_SIZE) + png_error(ps->pwrite, "invalid store call"); + + pb = voidcast(png_store_buffer*, malloc(sizeof *pb)); + + if (pb == NULL) + png_error(ps->pwrite, "store new: OOM"); + + *pb = ps->new; + ps->new.prev = pb; + ps->writepos = 0; +} + +static void +store_freefile(png_store_file **ppf) +{ + if (*ppf != NULL) + { + store_freefile(&(*ppf)->next); + + store_freebuffer(&(*ppf)->data); + (*ppf)->datacount = 0; + if ((*ppf)->palette != NULL) + { + free((*ppf)->palette); + (*ppf)->palette = NULL; + (*ppf)->npalette = 0; + } + free(*ppf); + *ppf = NULL; + } +} + +/* Main interface to file storeage, after writing a new PNG file (see the API + * below) call store_storefile to store the result with the given name and id. + */ +static void +store_storefile(png_store *ps, png_uint_32 id) +{ + png_store_file *pf = voidcast(png_store_file*, malloc(sizeof *pf)); + if (pf == NULL) + png_error(ps->pwrite, "storefile: OOM"); + safecat(pf->name, sizeof pf->name, 0, ps->wname); + pf->id = id; + pf->data = ps->new; + pf->datacount = ps->writepos; + ps->new.prev = NULL; + ps->writepos = 0; + pf->palette = ps->palette; + pf->npalette = ps->npalette; + ps->palette = 0; + ps->npalette = 0; + + /* And save it. */ + pf->next = ps->saved; + ps->saved = pf; +} + +/* Generate an error message (in the given buffer) */ +static size_t +store_message(png_store *ps, png_structp pp, char *buffer, size_t bufsize, + size_t pos, PNG_CONST char *msg) +{ + if (pp != NULL && pp == ps->pread) + { + /* Reading a file */ + pos = safecat(buffer, bufsize, pos, "read: "); + + if (ps->current != NULL) + { + pos = safecat(buffer, bufsize, pos, ps->current->name); + pos = safecat(buffer, bufsize, pos, sep); + } + } + + else if (pp != NULL && pp == ps->pwrite) + { + /* Writing a file */ + pos = safecat(buffer, bufsize, pos, "write: "); + pos = safecat(buffer, bufsize, pos, ps->wname); + pos = safecat(buffer, bufsize, pos, sep); + } + + else + { + /* Neither reading nor writing (or a memory error in struct delete) */ + pos = safecat(buffer, bufsize, pos, "pngvalid: "); + } + + if (ps->test[0] != 0) + { + pos = safecat(buffer, bufsize, pos, ps->test); + pos = safecat(buffer, bufsize, pos, sep); + } + pos = safecat(buffer, bufsize, pos, msg); + return pos; +} + +/* Verbose output to the error stream: */ +static void +store_verbose(png_store *ps, png_structp pp, png_const_charp prefix, + png_const_charp message) +{ + char buffer[512]; + + if (prefix) + fputs(prefix, stderr); + + (void)store_message(ps, pp, buffer, sizeof buffer, 0, message); + fputs(buffer, stderr); + fputc('\n', stderr); +} + +/* Log an error or warning - the relevant count is always incremented. */ +static void +store_log(png_store* ps, png_structp pp, png_const_charp message, int is_error) +{ + /* The warning is copied to the error buffer if there are no errors and it is + * the first warning. The error is copied to the error buffer if it is the + * first error (overwriting any prior warnings). + */ + if (is_error ? (ps->nerrors)++ == 0 : + (ps->nwarnings)++ == 0 && ps->nerrors == 0) + store_message(ps, pp, ps->error, sizeof ps->error, 0, message); + + if (ps->verbose) + store_verbose(ps, pp, is_error ? "error: " : "warning: ", message); +} + +/* Functions to use as PNG callbacks. */ +static void +store_error(png_structp pp, png_const_charp message) /* PNG_NORETURN */ +{ + png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); + + if (!ps->expect_error) + store_log(ps, pp, message, 1 /* error */); + + /* And finally throw an exception. */ + { + struct exception_context *the_exception_context = &ps->exception_context; + Throw ps; + } +} + +static void +store_warning(png_structp pp, png_const_charp message) +{ + png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); + + if (!ps->expect_warning) + store_log(ps, pp, message, 0 /* warning */); + else + ps->saw_warning = 1; +} + +/* These somewhat odd functions are used when reading an image to ensure that + * the buffer is big enough, the png_structp is for errors. + */ +/* Return a single row from the correct image. */ +static png_bytep +store_image_row(PNG_CONST png_store* ps, png_structp pp, int nImage, + png_uint_32 y) +{ + png_size_t coffset = (nImage * ps->image_h + y) * (ps->cb_row + 5) + 2; + + if (ps->image == NULL) + png_error(pp, "no allocated image"); + + if (coffset + ps->cb_row + 3 > ps->cb_image) + png_error(pp, "image too small"); + + return ps->image + coffset; +} + +static void +store_image_free(png_store *ps, png_structp pp) +{ + if (ps->image != NULL) + { + png_bytep image = ps->image; + + if (image[-1] != 0xed || image[ps->cb_image] != 0xfe) + { + if (pp != NULL) + png_error(pp, "png_store image overwrite (1)"); + else + store_log(ps, NULL, "png_store image overwrite (2)", 1); + } + + ps->image = NULL; + ps->cb_image = 0; + --image; + free(image); + } +} + +static void +store_ensure_image(png_store *ps, png_structp pp, int nImages, png_size_t cbRow, + png_uint_32 cRows) +{ + png_size_t cb = nImages * cRows * (cbRow + 5); + + if (ps->cb_image < cb) + { + png_bytep image; + + store_image_free(ps, pp); + + /* The buffer is deliberately mis-aligned. */ + image = voidcast(png_bytep, malloc(cb+2)); + if (image == NULL) + { + /* Called from the startup - ignore the error for the moment. */ + if (pp == NULL) + return; + + png_error(pp, "OOM allocating image buffer"); + } + + /* These magic tags are used to detect overwrites above. */ + ++image; + image[-1] = 0xed; + image[cb] = 0xfe; + + ps->image = image; + ps->cb_image = cb; + } + + /* We have an adequate sized image; lay out the rows. There are 2 bytes at + * the start and three at the end of each (this ensures that the row + * alignment starts out odd - 2+1 and changes for larger images on each row.) + */ + ps->cb_row = cbRow; + ps->image_h = cRows; + + /* For error checking, the whole buffer is set to 10110010 (0xb2 - 178). + * This deliberately doesn't match the bits in the size test image which are + * outside the image; these are set to 0xff (all 1). To make the row + * comparison work in the 'size' test case the size rows are pre-initialized + * to the same value prior to calling 'standard_row'. + */ + memset(ps->image, 178, cb); + + /* Then put in the marks. */ + while (--nImages >= 0) + { + png_uint_32 y; + + for (y=0; yimage; + + if (image[-1] != 0xed || image[ps->cb_image] != 0xfe) + png_error(pp, "image overwrite"); + else + { + png_size_t cbRow = ps->cb_row; + png_uint_32 rows = ps->image_h; + + image += iImage * (cbRow+5) * ps->image_h; + + image += 2; /* skip image first row markers */ + + while (rows-- > 0) + { + if (image[-2] != 190 || image[-1] != 239) + png_error(pp, "row start overwritten"); + + if (image[cbRow] != 222 || image[cbRow+1] != 173 || + image[cbRow+2] != 17) + png_error(pp, "row end overwritten"); + + image += cbRow+5; + } + } +} + +static void +store_write(png_structp pp, png_bytep pb, png_size_t st) +{ + png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); + + if (ps->pwrite != pp) + png_error(pp, "store state damaged"); + + while (st > 0) + { + size_t cb; + + if (ps->writepos >= STORE_BUFFER_SIZE) + store_storenew(ps); + + cb = st; + + if (cb > STORE_BUFFER_SIZE - ps->writepos) + cb = STORE_BUFFER_SIZE - ps->writepos; + + memcpy(ps->new.buffer + ps->writepos, pb, cb); + pb += cb; + st -= cb; + ps->writepos += cb; + } +} + +static void +store_flush(png_structp pp) +{ + UNUSED(pp) /*DOES NOTHING*/ +} + +static size_t +store_read_buffer_size(png_store *ps) +{ + /* Return the bytes available for read in the current buffer. */ + if (ps->next != &ps->current->data) + return STORE_BUFFER_SIZE; + + return ps->current->datacount; +} + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +/* Return total bytes available for read. */ +static size_t +store_read_buffer_avail(png_store *ps) +{ + if (ps->current != NULL && ps->next != NULL) + { + png_store_buffer *next = &ps->current->data; + size_t cbAvail = ps->current->datacount; + + while (next != ps->next && next != NULL) + { + next = next->prev; + cbAvail += STORE_BUFFER_SIZE; + } + + if (next != ps->next) + png_error(ps->pread, "buffer read error"); + + if (cbAvail > ps->readpos) + return cbAvail - ps->readpos; + } + + return 0; +} +#endif + +static int +store_read_buffer_next(png_store *ps) +{ + png_store_buffer *pbOld = ps->next; + png_store_buffer *pbNew = &ps->current->data; + if (pbOld != pbNew) + { + while (pbNew != NULL && pbNew->prev != pbOld) + pbNew = pbNew->prev; + + if (pbNew != NULL) + { + ps->next = pbNew; + ps->readpos = 0; + return 1; + } + + png_error(ps->pread, "buffer lost"); + } + + return 0; /* EOF or error */ +} + +/* Need separate implementation and callback to allow use of the same code + * during progressive read, where the io_ptr is set internally by libpng. + */ +static void +store_read_imp(png_store *ps, png_bytep pb, png_size_t st) +{ + if (ps->current == NULL || ps->next == NULL) + png_error(ps->pread, "store state damaged"); + + while (st > 0) + { + size_t cbAvail = store_read_buffer_size(ps) - ps->readpos; + + if (cbAvail > 0) + { + if (cbAvail > st) cbAvail = st; + memcpy(pb, ps->next->buffer + ps->readpos, cbAvail); + st -= cbAvail; + pb += cbAvail; + ps->readpos += cbAvail; + } + + else if (!store_read_buffer_next(ps)) + png_error(ps->pread, "read beyond end of file"); + } +} + +static void +store_read(png_structp pp, png_bytep pb, png_size_t st) +{ + png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); + + if (ps == NULL || ps->pread != pp) + png_error(pp, "bad store read call"); + + store_read_imp(ps, pb, st); +} + +static void +store_progressive_read(png_store *ps, png_structp pp, png_infop pi) +{ + /* Notice that a call to store_read will cause this function to fail because + * readpos will be set. + */ + if (ps->pread != pp || ps->current == NULL || ps->next == NULL) + png_error(pp, "store state damaged (progressive)"); + + do + { + if (ps->readpos != 0) + png_error(pp, "store_read called during progressive read"); + + png_process_data(pp, pi, ps->next->buffer, store_read_buffer_size(ps)); + } + while (store_read_buffer_next(ps)); +} + +/* The caller must fill this in: */ +static store_palette_entry * +store_write_palette(png_store *ps, int npalette) +{ + if (ps->pwrite == NULL) + store_log(ps, NULL, "attempt to write palette without write stream", 1); + + if (ps->palette != NULL) + png_error(ps->pwrite, "multiple store_write_palette calls"); + + /* This function can only return NULL if called with '0'! */ + if (npalette > 0) + { + ps->palette = voidcast(store_palette_entry*, malloc(npalette * + sizeof *ps->palette)); + + if (ps->palette == NULL) + png_error(ps->pwrite, "store new palette: OOM"); + + ps->npalette = npalette; + } + + return ps->palette; +} + +static store_palette_entry * +store_current_palette(png_store *ps, int *npalette) +{ + /* This is an internal error (the call has been made outside a read + * operation.) + */ + if (ps->current == NULL) + store_log(ps, ps->pread, "no current stream for palette", 1); + + /* The result may be null if there is no palette. */ + *npalette = ps->current->npalette; + return ps->current->palette; +} + +/***************************** MEMORY MANAGEMENT*** ***************************/ +/* A store_memory is simply the header for an allocated block of memory. The + * pointer returned to libpng is just after the end of the header block, the + * allocated memory is followed by a second copy of the 'mark'. + */ +typedef struct store_memory +{ + store_pool *pool; /* Originating pool */ + struct store_memory *next; /* Singly linked list */ + png_alloc_size_t size; /* Size of memory allocated */ + png_byte mark[4]; /* ID marker */ +} store_memory; + +/* Handle a fatal error in memory allocation. This calls png_error if the + * libpng struct is non-NULL, else it outputs a message and returns. This means + * that a memory problem while libpng is running will abort (png_error) the + * handling of particular file while one in cleanup (after the destroy of the + * struct has returned) will simply keep going and free (or attempt to free) + * all the memory. + */ +static void +store_pool_error(png_store *ps, png_structp pp, PNG_CONST char *msg) +{ + if (pp != NULL) + png_error(pp, msg); + + /* Else we have to do it ourselves. png_error eventually calls store_log, + * above. store_log accepts a NULL png_structp - it just changes what gets + * output by store_message. + */ + store_log(ps, pp, msg, 1 /* error */); +} + +static void +store_memory_free(png_structp pp, store_pool *pool, store_memory *memory) +{ + /* Note that pp may be NULL (see store_pool_delete below), the caller has + * found 'memory' in pool->list *and* unlinked this entry, so this is a valid + * pointer (for sure), but the contents may have been trashed. + */ + if (memory->pool != pool) + store_pool_error(pool->store, pp, "memory corrupted (pool)"); + + else if (memcmp(memory->mark, pool->mark, sizeof memory->mark) != 0) + store_pool_error(pool->store, pp, "memory corrupted (start)"); + + /* It should be safe to read the size field now. */ + else + { + png_alloc_size_t cb = memory->size; + + if (cb > pool->max) + store_pool_error(pool->store, pp, "memory corrupted (size)"); + + else if (memcmp((png_bytep)(memory+1)+cb, pool->mark, sizeof pool->mark) + != 0) + store_pool_error(pool->store, pp, "memory corrupted (end)"); + + /* Finally give the library a chance to find problems too: */ + else + { + pool->current -= cb; + free(memory); + } + } +} + +static void +store_pool_delete(png_store *ps, store_pool *pool) +{ + if (pool->list != NULL) + { + fprintf(stderr, "%s: %s %s: memory lost (list follows):\n", ps->test, + pool == &ps->read_memory_pool ? "read" : "write", + pool == &ps->read_memory_pool ? (ps->current != NULL ? + ps->current->name : "unknown file") : ps->wname); + ++ps->nerrors; + + do + { + store_memory *next = pool->list; + pool->list = next->next; + next->next = NULL; + + fprintf(stderr, "\t%lu bytes @ %p\n", + (unsigned long)next->size, (PNG_CONST void*)(next+1)); + /* The NULL means this will always return, even if the memory is + * corrupted. + */ + store_memory_free(NULL, pool, next); + } + while (pool->list != NULL); + } + + /* And reset the other fields too for the next time. */ + if (pool->max > pool->max_max) pool->max_max = pool->max; + pool->max = 0; + if (pool->current != 0) /* unexpected internal error */ + fprintf(stderr, "%s: %s %s: memory counter mismatch (internal error)\n", + ps->test, pool == &ps->read_memory_pool ? "read" : "write", + pool == &ps->read_memory_pool ? (ps->current != NULL ? + ps->current->name : "unknown file") : ps->wname); + pool->current = 0; + + if (pool->limit > pool->max_limit) + pool->max_limit = pool->limit; + + pool->limit = 0; + + if (pool->total > pool->max_total) + pool->max_total = pool->total; + + pool->total = 0; + + /* Get a new mark too. */ + store_pool_mark(pool->mark); +} + +/* The memory callbacks: */ +static png_voidp +store_malloc(png_structp pp, png_alloc_size_t cb) +{ + store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); + store_memory *new = voidcast(store_memory*, malloc(cb + (sizeof *new) + + (sizeof pool->mark))); + + if (new != NULL) + { + if (cb > pool->max) + pool->max = cb; + + pool->current += cb; + + if (pool->current > pool->limit) + pool->limit = pool->current; + + pool->total += cb; + + new->size = cb; + memcpy(new->mark, pool->mark, sizeof new->mark); + memcpy((png_byte*)(new+1) + cb, pool->mark, sizeof pool->mark); + new->pool = pool; + new->next = pool->list; + pool->list = new; + ++new; + } + + else + store_pool_error(pool->store, pp, "out of memory"); + + return new; +} + +static void +store_free(png_structp pp, png_voidp memory) +{ + store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); + store_memory *this = voidcast(store_memory*, memory), **test; + + /* First check that this 'memory' really is valid memory - it must be in the + * pool list. If it is, use the shared memory_free function to free it. + */ + --this; + for (test = &pool->list; *test != this; test = &(*test)->next) + { + if (*test == NULL) + { + store_pool_error(pool->store, pp, "bad pointer to free"); + return; + } + } + + /* Unlink this entry, *test == this. */ + *test = this->next; + this->next = NULL; + store_memory_free(pp, pool, this); +} + +/* Setup functions. */ +/* Cleanup when aborting a write or after storing the new file. */ +static void +store_write_reset(png_store *ps) +{ + if (ps->pwrite != NULL) + { + anon_context(ps); + + Try + png_destroy_write_struct(&ps->pwrite, &ps->piwrite); + + Catch_anonymous + { + /* memory corruption: continue. */ + } + + ps->pwrite = NULL; + ps->piwrite = NULL; + } + + /* And make sure that all the memory has been freed - this will output + * spurious errors in the case of memory corruption above, but this is safe. + */ + store_pool_delete(ps, &ps->write_memory_pool); + + store_freenew(ps); +} + +/* The following is the main write function, it returns a png_struct and, + * optionally, a png_info suitable for writiing a new PNG file. Use + * store_storefile above to record this file after it has been written. The + * returned libpng structures as destroyed by store_write_reset above. + */ +static png_structp +set_store_for_write(png_store *ps, png_infopp ppi, + PNG_CONST char * volatile name) +{ + anon_context(ps); + + Try + { + if (ps->pwrite != NULL) + png_error(ps->pwrite, "write store already in use"); + + store_write_reset(ps); + safecat(ps->wname, sizeof ps->wname, 0, name); + + /* Don't do the slow memory checks if doing a speed test. */ + if (ps->speed) + ps->pwrite = png_create_write_struct(PNG_LIBPNG_VER_STRING, + ps, store_error, store_warning); + + else + ps->pwrite = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, + ps, store_error, store_warning, &ps->write_memory_pool, + store_malloc, store_free); + + png_set_write_fn(ps->pwrite, ps, store_write, store_flush); + + if (ppi != NULL) + *ppi = ps->piwrite = png_create_info_struct(ps->pwrite); + } + + Catch_anonymous + return NULL; + + return ps->pwrite; +} + +/* Cleanup when finished reading (either due to error or in the success case). + */ +static void +store_read_reset(png_store *ps) +{ + if (ps->pread != NULL) + { + anon_context(ps); + + Try + png_destroy_read_struct(&ps->pread, &ps->piread, NULL); + + Catch_anonymous + { + /* error already output: continue */ + } + + ps->pread = NULL; + ps->piread = NULL; + } + + /* Always do this to be safe. */ + store_pool_delete(ps, &ps->read_memory_pool); + + ps->current = NULL; + ps->next = NULL; + ps->readpos = 0; + ps->validated = 0; +} + +static void +store_read_set(png_store *ps, png_uint_32 id) +{ + png_store_file *pf = ps->saved; + + while (pf != NULL) + { + if (pf->id == id) + { + ps->current = pf; + ps->next = NULL; + store_read_buffer_next(ps); + return; + } + + pf = pf->next; + } + + { + size_t pos; + char msg[FILE_NAME_SIZE+64]; + + pos = standard_name_from_id(msg, sizeof msg, 0, id); + pos = safecat(msg, sizeof msg, pos, ": file not found"); + png_error(ps->pread, msg); + } +} + +/* The main interface for reading a saved file - pass the id number of the file + * to retrieve. Ids must be unique or the earlier file will be hidden. The API + * returns a png_struct and, optionally, a png_info. Both of these will be + * destroyed by store_read_reset above. + */ +static png_structp +set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id, + PNG_CONST char *name) +{ + /* Set the name for png_error */ + safecat(ps->test, sizeof ps->test, 0, name); + + if (ps->pread != NULL) + png_error(ps->pread, "read store already in use"); + + store_read_reset(ps); + + /* Both the create APIs can return NULL if used in their default mode + * (because there is no other way of handling an error because the jmp_buf + * by default is stored in png_struct and that has not been allocated!) + * However, given that store_error works correctly in these circumstances + * we don't ever expect NULL in this program. + */ + if (ps->speed) + ps->pread = png_create_read_struct(PNG_LIBPNG_VER_STRING, ps, + store_error, store_warning); + + else + ps->pread = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, ps, + store_error, store_warning, &ps->read_memory_pool, store_malloc, + store_free); + + if (ps->pread == NULL) + { + struct exception_context *the_exception_context = &ps->exception_context; + + store_log(ps, NULL, "png_create_read_struct returned NULL (unexpected)", + 1 /*error*/); + + Throw ps; + } + + store_read_set(ps, id); + + if (ppi != NULL) + *ppi = ps->piread = png_create_info_struct(ps->pread); + + return ps->pread; +} + +/* The overall cleanup of a store simply calls the above then removes all the + * saved files. This does not delete the store itself. + */ +static void +store_delete(png_store *ps) +{ + store_write_reset(ps); + store_read_reset(ps); + store_freefile(&ps->saved); + store_image_free(ps, NULL); +} + +/*********************** PNG FILE MODIFICATION ON READ ************************/ +/* Files may be modified on read. The following structure contains a complete + * png_store together with extra members to handle modification and a special + * read callback for libpng. To use this the 'modifications' field must be set + * to a list of png_modification structures that actually perform the + * modification, otherwise a png_modifier is functionally equivalent to a + * png_store. There is a special read function, set_modifier_for_read, which + * replaces set_store_for_read. + */ +typedef enum modifier_state +{ + modifier_start, /* Initial value */ + modifier_signature, /* Have a signature */ + modifier_IHDR /* Have an IHDR */ +} modifier_state; + +typedef struct CIE_color +{ + /* A single CIE tristimulus value, representing the unique response of a + * standard observer to a variety of light spectra. The observer recognizes + * all spectra that produce this response as the same color, therefore this + * is effectively a description of a color. + */ + double X, Y, Z; +} CIE_color; + +static double +chromaticity_x(CIE_color c) +{ + return c.X / (c.X + c.Y + c.Z); +} + +static double +chromaticity_y(CIE_color c) +{ + return c.Y / (c.X + c.Y + c.Z); +} + +typedef struct color_encoding +{ + /* A description of an (R,G,B) encoding of color (as defined above); this + * includes the actual colors of the (R,G,B) triples (1,0,0), (0,1,0) and + * (0,0,1) plus an encoding value that is used to encode the linear + * components R, G and B to give the actual values R^gamma, G^gamma and + * B^gamma that are stored. + */ + double gamma; /* Encoding (file) gamma of space */ + CIE_color red, green, blue; /* End points */ +} color_encoding; + +static CIE_color +white_point(PNG_CONST color_encoding *encoding) +{ + CIE_color white; + + white.X = encoding->red.X + encoding->green.X + encoding->blue.X; + white.Y = encoding->red.Y + encoding->green.Y + encoding->blue.Y; + white.Z = encoding->red.Z + encoding->green.Z + encoding->blue.Z; + + return white; +} + +static void +normalize_color_encoding(color_encoding *encoding) +{ + PNG_CONST double whiteY = encoding->red.Y + encoding->green.Y + + encoding->blue.Y; + + if (whiteY != 1) + { + encoding->red.X /= whiteY; + encoding->red.Y /= whiteY; + encoding->red.Z /= whiteY; + encoding->green.X /= whiteY; + encoding->green.Y /= whiteY; + encoding->green.Z /= whiteY; + encoding->blue.X /= whiteY; + encoding->blue.Y /= whiteY; + encoding->blue.Z /= whiteY; + } +} + +static size_t +safecat_color_encoding(char *buffer, size_t bufsize, size_t pos, + PNG_CONST color_encoding *e, double encoding_gamma) +{ + if (e != 0) + { + if (encoding_gamma != 0) + pos = safecat(buffer, bufsize, pos, "("); + pos = safecat(buffer, bufsize, pos, "R("); + pos = safecatd(buffer, bufsize, pos, e->red.X, 4); + pos = safecat(buffer, bufsize, pos, ","); + pos = safecatd(buffer, bufsize, pos, e->red.Y, 4); + pos = safecat(buffer, bufsize, pos, ","); + pos = safecatd(buffer, bufsize, pos, e->red.Z, 4); + pos = safecat(buffer, bufsize, pos, "),G("); + pos = safecatd(buffer, bufsize, pos, e->green.X, 4); + pos = safecat(buffer, bufsize, pos, ","); + pos = safecatd(buffer, bufsize, pos, e->green.Y, 4); + pos = safecat(buffer, bufsize, pos, ","); + pos = safecatd(buffer, bufsize, pos, e->green.Z, 4); + pos = safecat(buffer, bufsize, pos, "),B("); + pos = safecatd(buffer, bufsize, pos, e->blue.X, 4); + pos = safecat(buffer, bufsize, pos, ","); + pos = safecatd(buffer, bufsize, pos, e->blue.Y, 4); + pos = safecat(buffer, bufsize, pos, ","); + pos = safecatd(buffer, bufsize, pos, e->blue.Z, 4); + pos = safecat(buffer, bufsize, pos, ")"); + if (encoding_gamma != 0) + pos = safecat(buffer, bufsize, pos, ")"); + } + + if (encoding_gamma != 0) + { + pos = safecat(buffer, bufsize, pos, "^"); + pos = safecatd(buffer, bufsize, pos, encoding_gamma, 5); + } + + return pos; +} + +typedef struct png_modifier +{ + png_store this; /* I am a png_store */ + struct png_modification *modifications; /* Changes to make */ + + modifier_state state; /* My state */ + + /* Information from IHDR: */ + png_byte bit_depth; /* From IHDR */ + png_byte colour_type; /* From IHDR */ + + /* While handling PLTE, IDAT and IEND these chunks may be pended to allow + * other chunks to be inserted. + */ + png_uint_32 pending_len; + png_uint_32 pending_chunk; + + /* Test values */ + double *gammas; + unsigned int ngammas; + unsigned int ngamma_tests; /* Number of gamma tests to run*/ + double current_gamma; /* 0 if not set */ + PNG_CONST color_encoding *encodings; + unsigned int nencodings; + PNG_CONST color_encoding *current_encoding; /* If an encoding has been set */ + unsigned int encoding_counter; /* For iteration */ + int encoding_ignored; /* Something overwrote it */ + + /* Control variables used to iterate through possible encodings, the + * following must be set to 0 and tested by the function that uses the + * png_modifier because the modifier only sets it to 1 (true.) + */ + unsigned int repeat :1; /* Repeat this transform test. */ + unsigned int test_uses_encoding :1; + + /* Lowest sbit to test (libpng fails for sbit < 8) */ + png_byte sbitlow; + + /* Error control - these are the limits on errors accepted by the gamma tests + * below. + */ + double maxout8; /* Maximum output value error */ + double maxabs8; /* Absolute sample error 0..1 */ + double maxcalc8; /* Absolute sample error 0..1 */ + double maxpc8; /* Percentage sample error 0..100% */ + double maxout16; /* Maximum output value error */ + double maxabs16; /* Absolute sample error 0..1 */ + double maxcalc16;/* Absolute sample error 0..1 */ + double maxpc16; /* Percentage sample error 0..100% */ + + /* This is set by transforms that need to allow a higher limit, it is an + * internal check on pngvalid to ensure that the calculated error limits are + * not ridiculous; without this it is too easy to make a mistake in pngvalid + * that allows any value through. + */ + double limit; /* limit on error values, normally 4E-3 */ + + /* Log limits - values above this are logged, but not necessarily + * warned. + */ + double log8; /* Absolute error in 8 bits to log */ + double log16; /* Absolute error in 16 bits to log */ + + /* Logged 8 and 16 bit errors ('output' values): */ + double error_gray_2; + double error_gray_4; + double error_gray_8; + double error_gray_16; + double error_color_8; + double error_color_16; + double error_indexed; + + /* Flags: */ + /* Whether to call png_read_update_info, not png_read_start_image, and how + * many times to call it. + */ + int use_update_info; + + /* Whether or not to interlace. */ + int interlace_type :9; /* int, but must store '1' */ + + /* Run the standard tests? */ + unsigned int test_standard :1; + + /* Run the odd-sized image and interlace read/write tests? */ + unsigned int test_size :1; + + /* Run tests on reading with a combiniation of transforms, */ + unsigned int test_transform :1; + + /* When to use the use_input_precision option: */ + unsigned int use_input_precision :1; + unsigned int use_input_precision_sbit :1; + unsigned int use_input_precision_16to8 :1; + + /* If set assume that the calculation bit depth is set by the input + * precision, not the output precision. + */ + unsigned int calculations_use_input_precision :1; + + /* If set assume that the calculations are done in 16 bits even if both input + * and output are 8 bit or less. + */ + unsigned int assume_16_bit_calculations :1; + + /* Which gamma tests to run: */ + unsigned int test_gamma_threshold :1; + unsigned int test_gamma_transform :1; /* main tests */ + unsigned int test_gamma_sbit :1; + unsigned int test_gamma_scale16 :1; + unsigned int test_gamma_background :1; + unsigned int test_gamma_alpha_mode :1; + unsigned int test_gamma_expand16 :1; + unsigned int test_exhaustive :1; + + unsigned int log :1; /* Log max error */ + + /* Buffer information, the buffer size limits the size of the chunks that can + * be modified - they must fit (including header and CRC) into the buffer! + */ + size_t flush; /* Count of bytes to flush */ + size_t buffer_count; /* Bytes in buffer */ + size_t buffer_position; /* Position in buffer */ + png_byte buffer[1024]; +} png_modifier; + +/* This returns true if the test should be stopped now because it has already + * failed and it is running silently. + */ +static int fail(png_modifier *pm) +{ + return !pm->log && !pm->this.verbose && (pm->this.nerrors > 0 || + (pm->this.treat_warnings_as_errors && pm->this.nwarnings > 0)); +} + +static void +modifier_init(png_modifier *pm) +{ + memset(pm, 0, sizeof *pm); + store_init(&pm->this); + pm->modifications = NULL; + pm->state = modifier_start; + pm->sbitlow = 1U; + pm->ngammas = 0; + pm->ngamma_tests = 0; + pm->gammas = 0; + pm->current_gamma = 0; + pm->encodings = 0; + pm->nencodings = 0; + pm->current_encoding = 0; + pm->encoding_counter = 0; + pm->encoding_ignored = 0; + pm->repeat = 0; + pm->test_uses_encoding = 0; + pm->maxout8 = pm->maxpc8 = pm->maxabs8 = pm->maxcalc8 = 0; + pm->maxout16 = pm->maxpc16 = pm->maxabs16 = pm->maxcalc16 = 0; + pm->limit = 4E-3; + pm->log8 = pm->log16 = 0; /* Means 'off' */ + pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = 0; + pm->error_gray_16 = pm->error_color_8 = pm->error_color_16 = 0; + pm->error_indexed = 0; + pm->use_update_info = 0; + pm->interlace_type = PNG_INTERLACE_NONE; + pm->test_standard = 0; + pm->test_size = 0; + pm->test_transform = 0; + pm->use_input_precision = 0; + pm->use_input_precision_sbit = 0; + pm->use_input_precision_16to8 = 0; + pm->calculations_use_input_precision = 0; + pm->test_gamma_threshold = 0; + pm->test_gamma_transform = 0; + pm->test_gamma_sbit = 0; + pm->test_gamma_scale16 = 0; + pm->test_gamma_background = 0; + pm->test_gamma_alpha_mode = 0; + pm->test_gamma_expand16 = 0; + pm->test_exhaustive = 0; + pm->log = 0; + + /* Rely on the memset for all the other fields - there are no pointers */ +} + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +/* If pm->calculations_use_input_precision is set then operations will happen + * with only 8 bit precision unless both the input and output bit depth are 16. + * + * If pm->assume_16_bit_calculations is set then even 8 bit calculations use 16 + * bit precision. This only affects those of the following limits that pertain + * to a calculation - not a digitization operation - unless the following API is + * called directly. + */ +static double digitize(PNG_CONST png_modifier *pm, double value, + int sample_depth, int do_round) +{ + /* 'value' is in the range 0 to 1, the result is the same value rounded to a + * multiple of the digitization factor - 8 or 16 bits depending on both the + * sample depth and the 'assume' setting. Digitization is normally by + * rounding and 'do_round' should be 1, if it is 0 the digitized value will + * be truncated. + */ + PNG_CONST unsigned int digitization_factor = + (pm->assume_16_bit_calculations || sample_depth == 16) ? 65535 : 255; + + /* Limiting the range is done as a convenience to the caller - it's easier to + * do it once here than every time at the call site. + */ + if (value <= 0) + value = 0; + else if (value >= 1) + value = 1; + + value *= digitization_factor; + if (do_round) value += .5; + return floor(value)/digitization_factor; +} + +static double abserr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +{ + /* Absolute error permitted in linear values - affected by the bit depth of + * the calculations. + */ + if (pm->assume_16_bit_calculations || (out_depth == 16 && (in_depth == 16 || + !pm->calculations_use_input_precision))) + return pm->maxabs16; + else + return pm->maxabs8; +} + +static double calcerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +{ + /* Error in the linear composition arithmetic - only relevant when + * composition actually happens (0 < alpha < 1). + */ + if (pm->assume_16_bit_calculations || (out_depth == 16 && (in_depth == 16 || + !pm->calculations_use_input_precision))) + return pm->maxcalc16; + else + return pm->maxcalc8; +} + +static double pcerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +{ + /* Percentage error permitted in the linear values. Note that the specified + * value is a percentage but this routine returns a simple number. + */ + if (pm->assume_16_bit_calculations || (out_depth == 16 && (in_depth == 16 || + !pm->calculations_use_input_precision))) + return pm->maxpc16 * .01; + else + return pm->maxpc8 * .01; +} + +/* Output error - the error in the encoded value. This is determined by the + * digitization of the output so can be +/-0.5 in the actual output value. In + * the expand_16 case with the current code in libpng the expand happens after + * all the calculations are done in 8 bit arithmetic, so even though the output + * depth is 16 the output error is determined by the 8 bit calculation. + * + * This limit is not determined by the bit depth of internal calculations. + * + * The specified parameter does *not* include the base .5 digitization error but + * it is added here. + */ +static double outerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +{ + /* There is a serious error in the 2 and 4 bit grayscale transform because + * the gamma table value (8 bits) is simply shifted, not rounded, so the + * error in 4 bit grayscale gamma is up to the value below. This is a hack + * to allow pngvalid to succeed: + * + * TODO: fix this in libpng + */ + if (out_depth == 2) + return .73182-.5; + + if (out_depth == 4) + return .90644-.5; + + if (out_depth == 16 && (in_depth == 16 || + !pm->calculations_use_input_precision)) + return pm->maxout16; + + /* This is the case where the value was calculated at 8-bit precision then + * scaled to 16 bits. + */ + else if (out_depth == 16) + return pm->maxout8 * 257; + + else + return pm->maxout8; +} + +/* This does the same thing as the above however it returns the value to log, + * rather than raising a warning. This is useful for debugging to track down + * exactly what set of parameters cause high error values. + */ +static double outlog(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +{ + /* The command line parameters are either 8 bit (0..255) or 16 bit (0..65535) + * and so must be adjusted for low bit depth grayscale: + */ + if (out_depth <= 8) + { + if (pm->log8 == 0) /* switched off */ + return 256; + + if (out_depth < 8) + return pm->log8 / 255 * ((1<log8; + } + + if (out_depth == 16 && (in_depth == 16 || + !pm->calculations_use_input_precision)) + { + if (pm->log16 == 0) + return 65536; + + return pm->log16; + } + + /* This is the case where the value was calculated at 8-bit precision then + * scaled to 16 bits. + */ + if (pm->log8 == 0) + return 65536; + + return pm->log8 * 257; +} + +/* This complements the above by providing the appropriate quantization for the + * final value. Normally this would just be quantization to an integral value, + * but in the 8 bit calculation case it's actually quantization to a multiple of + * 257! + */ +static int output_quantization_factor(PNG_CONST png_modifier *pm, int in_depth, + int out_depth) +{ + if (out_depth == 16 && in_depth != 16 + && pm->calculations_use_input_precision) + return 257; + else + return 1; +} + +/* One modification structure must be provided for each chunk to be modified (in + * fact more than one can be provided if multiple separate changes are desired + * for a single chunk.) Modifications include adding a new chunk when a + * suitable chunk does not exist. + * + * The caller of modify_fn will reset the CRC of the chunk and record 'modified' + * or 'added' as appropriate if the modify_fn returns 1 (true). If the + * modify_fn is NULL the chunk is simply removed. + */ +typedef struct png_modification +{ + struct png_modification *next; + png_uint_32 chunk; + + /* If the following is NULL all matching chunks will be removed: */ + int (*modify_fn)(struct png_modifier *pm, + struct png_modification *me, int add); + + /* If the following is set to PLTE, IDAT or IEND and the chunk has not been + * found and modified (and there is a modify_fn) the modify_fn will be called + * to add the chunk before the relevant chunk. + */ + png_uint_32 add; + unsigned int modified :1; /* Chunk was modified */ + unsigned int added :1; /* Chunk was added */ + unsigned int removed :1; /* Chunk was removed */ +} png_modification; + +static void +modification_reset(png_modification *pmm) +{ + if (pmm != NULL) + { + pmm->modified = 0; + pmm->added = 0; + pmm->removed = 0; + modification_reset(pmm->next); + } +} + +static void +modification_init(png_modification *pmm) +{ + memset(pmm, 0, sizeof *pmm); + pmm->next = NULL; + pmm->chunk = 0; + pmm->modify_fn = NULL; + pmm->add = 0; + modification_reset(pmm); +} + +static void +modifier_current_encoding(PNG_CONST png_modifier *pm, color_encoding *ce) +{ + if (pm->current_encoding != 0) + *ce = *pm->current_encoding; + + else + memset(ce, 0, sizeof *ce); + + ce->gamma = pm->current_gamma; +} + +static size_t +safecat_current_encoding(char *buffer, size_t bufsize, size_t pos, + PNG_CONST png_modifier *pm) +{ + pos = safecat_color_encoding(buffer, bufsize, pos, pm->current_encoding, + pm->current_gamma); + + if (pm->encoding_ignored) + pos = safecat(buffer, bufsize, pos, "[overridden]"); + + return pos; +} + +/* Iterate through the usefully testable color encodings. An encoding is one + * of: + * + * 1) Nothing (no color space, no gamma). + * 2) Just a gamma value from the gamma array (including 1.0) + * 3) A color space from the encodings array with the corresponding gamma. + * 4) The same, but with gamma 1.0 (only really useful with 16 bit calculations) + * + * The iterator selects these in turn, the randomizer selects one at random, + * which is used depends on the setting of the 'test_exhaustive' flag. Notice + * that this function changes the colour space encoding so it must only be + * called on completion of the previous test. This is what 'modifier_reset' + * does, below. + * + * After the function has been called the 'repeat' flag will still be set; the + * caller of modifier_reset must reset it at the start of each run of the test! + */ +static unsigned int +modifier_total_encodings(PNG_CONST png_modifier *pm) +{ + return 1 + /* (1) nothing */ + pm->ngammas + /* (2) gamma values to test */ + pm->nencodings + /* (3) total number of encodings */ + /* The following test only works after the first time through the + * png_modifier code because 'bit_depth' is set when the IHDR is read. + * modifier_reset, below, preserves the setting until after it has called + * the iterate function (also below.) + * + * For this reason do not rely on this function outside a call to + * modifier_reset. + */ + ((pm->bit_depth == 16 || pm->assume_16_bit_calculations) ? + pm->nencodings : 0); /* (4) encodings with gamma == 1.0 */ +} + +static void +modifier_encoding_iterate(png_modifier *pm) +{ + if (!pm->repeat && /* Else something needs the current encoding again. */ + pm->test_uses_encoding) /* Some transform is encoding dependent */ + { + if (pm->test_exhaustive) + { + if (++pm->encoding_counter >= modifier_total_encodings(pm)) + pm->encoding_counter = 0; /* This will stop the repeat */ + } + + else + { + /* Not exhaustive - choose an encoding at random; generate a number in + * the range 1..(max-1), so the result is always non-zero: + */ + if (pm->encoding_counter == 0) + pm->encoding_counter = random_mod(modifier_total_encodings(pm)-1)+1; + else + pm->encoding_counter = 0; + } + + if (pm->encoding_counter > 0) + pm->repeat = 1; + } + + else if (!pm->repeat) + pm->encoding_counter = 0; +} + +static void +modifier_reset(png_modifier *pm) +{ + store_read_reset(&pm->this); + pm->limit = 4E-3; + pm->pending_len = pm->pending_chunk = 0; + pm->flush = pm->buffer_count = pm->buffer_position = 0; + pm->modifications = NULL; + pm->state = modifier_start; + modifier_encoding_iterate(pm); + /* The following must be set in the next run. In particular + * test_uses_encodings must be set in the _ini function of each transform + * that looks at the encodings. (Not the 'add' function!) + */ + pm->test_uses_encoding = 0; + pm->current_gamma = 0; + pm->current_encoding = 0; + pm->encoding_ignored = 0; + /* These only become value after IHDR is read: */ + pm->bit_depth = pm->colour_type = 0; +} + +/* The following must be called before anything else to get the encoding set up + * on the modifier. In particular it must be called before the transform init + * functions are called. + */ +static void +modifier_set_encoding(png_modifier *pm) +{ + /* Set the encoding to the one specified by the current encoding counter, + * first clear out all the settings - this corresponds to an encoding_counter + * of 0. + */ + pm->current_gamma = 0; + pm->current_encoding = 0; + pm->encoding_ignored = 0; /* not ignored yet - happens in _ini functions. */ + + /* Now, if required, set the gamma and encoding fields. */ + if (pm->encoding_counter > 0) + { + /* The gammas[] array is an array of screen gammas, not encoding gammas, + * so we need the inverse: + */ + if (pm->encoding_counter <= pm->ngammas) + pm->current_gamma = 1/pm->gammas[pm->encoding_counter-1]; + + else + { + unsigned int i = pm->encoding_counter - pm->ngammas; + + if (i >= pm->nencodings) + { + i %= pm->nencodings; + pm->current_gamma = 1; /* Linear, only in the 16 bit case */ + } + + else + pm->current_gamma = pm->encodings[i].gamma; + + pm->current_encoding = pm->encodings + i; + } + } +} + +/* Enquiry functions to find out what is set. Notice that there is an implicit + * assumption below that the first encoding in the list is the one for sRGB. + */ +static int +modifier_color_encoding_is_sRGB(PNG_CONST png_modifier *pm) +{ + return pm->current_encoding != 0 && pm->current_encoding == pm->encodings && + pm->current_encoding->gamma == pm->current_gamma; +} + +static int +modifier_color_encoding_is_set(PNG_CONST png_modifier *pm) +{ + return pm->current_gamma != 0; +} + +/* Convenience macros. */ +#define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) +#define CHUNK_IHDR CHUNK(73,72,68,82) +#define CHUNK_PLTE CHUNK(80,76,84,69) +#define CHUNK_IDAT CHUNK(73,68,65,84) +#define CHUNK_IEND CHUNK(73,69,78,68) +#define CHUNK_cHRM CHUNK(99,72,82,77) +#define CHUNK_gAMA CHUNK(103,65,77,65) +#define CHUNK_sBIT CHUNK(115,66,73,84) +#define CHUNK_sRGB CHUNK(115,82,71,66) + +/* The guts of modification are performed during a read. */ +static void +modifier_crc(png_bytep buffer) +{ + /* Recalculate the chunk CRC - a complete chunk must be in + * the buffer, at the start. + */ + uInt datalen = png_get_uint_32(buffer); + uLong crc = crc32(0, buffer+4, datalen+4); + /* The cast to png_uint_32 is safe because a crc32 is always a 32 bit value. + */ + png_save_uint_32(buffer+datalen+8, (png_uint_32)crc); +} + +static void +modifier_setbuffer(png_modifier *pm) +{ + modifier_crc(pm->buffer); + pm->buffer_count = png_get_uint_32(pm->buffer)+12; + pm->buffer_position = 0; +} + +/* Separate the callback into the actual implementation (which is passed the + * png_modifier explicitly) and the callback, which gets the modifier from the + * png_struct. + */ +static void +modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) +{ + while (st > 0) + { + size_t cb; + png_uint_32 len, chunk; + png_modification *mod; + + if (pm->buffer_position >= pm->buffer_count) switch (pm->state) + { + static png_byte sign[8] = { 137, 80, 78, 71, 13, 10, 26, 10 }; + case modifier_start: + store_read_imp(&pm->this, pm->buffer, 8); /* size of signature. */ + pm->buffer_count = 8; + pm->buffer_position = 0; + + if (memcmp(pm->buffer, sign, 8) != 0) + png_error(pm->this.pread, "invalid PNG file signature"); + pm->state = modifier_signature; + break; + + case modifier_signature: + store_read_imp(&pm->this, pm->buffer, 13+12); /* size of IHDR */ + pm->buffer_count = 13+12; + pm->buffer_position = 0; + + if (png_get_uint_32(pm->buffer) != 13 || + png_get_uint_32(pm->buffer+4) != CHUNK_IHDR) + png_error(pm->this.pread, "invalid IHDR"); + + /* Check the list of modifiers for modifications to the IHDR. */ + mod = pm->modifications; + while (mod != NULL) + { + if (mod->chunk == CHUNK_IHDR && mod->modify_fn && + (*mod->modify_fn)(pm, mod, 0)) + { + mod->modified = 1; + modifier_setbuffer(pm); + } + + /* Ignore removal or add if IHDR! */ + mod = mod->next; + } + + /* Cache information from the IHDR (the modified one.) */ + pm->bit_depth = pm->buffer[8+8]; + pm->colour_type = pm->buffer[8+8+1]; + + pm->state = modifier_IHDR; + pm->flush = 0; + break; + + case modifier_IHDR: + default: + /* Read a new chunk and process it until we see PLTE, IDAT or + * IEND. 'flush' indicates that there is still some data to + * output from the preceding chunk. + */ + if ((cb = pm->flush) > 0) + { + if (cb > st) cb = st; + pm->flush -= cb; + store_read_imp(&pm->this, pb, cb); + pb += cb; + st -= cb; + if (st == 0) return; + } + + /* No more bytes to flush, read a header, or handle a pending + * chunk. + */ + if (pm->pending_chunk != 0) + { + png_save_uint_32(pm->buffer, pm->pending_len); + png_save_uint_32(pm->buffer+4, pm->pending_chunk); + pm->pending_len = 0; + pm->pending_chunk = 0; + } + else + store_read_imp(&pm->this, pm->buffer, 8); + + pm->buffer_count = 8; + pm->buffer_position = 0; + + /* Check for something to modify or a terminator chunk. */ + len = png_get_uint_32(pm->buffer); + chunk = png_get_uint_32(pm->buffer+4); + + /* Terminators first, they may have to be delayed for added + * chunks + */ + if (chunk == CHUNK_PLTE || chunk == CHUNK_IDAT || + chunk == CHUNK_IEND) + { + mod = pm->modifications; + + while (mod != NULL) + { + if ((mod->add == chunk || + (mod->add == CHUNK_PLTE && chunk == CHUNK_IDAT)) && + mod->modify_fn != NULL && !mod->modified && !mod->added) + { + /* Regardless of what the modify function does do not run + * this again. + */ + mod->added = 1; + + if ((*mod->modify_fn)(pm, mod, 1 /*add*/)) + { + /* Reset the CRC on a new chunk */ + if (pm->buffer_count > 0) + modifier_setbuffer(pm); + + else + { + pm->buffer_position = 0; + mod->removed = 1; + } + + /* The buffer has been filled with something (we assume) + * so output this. Pend the current chunk. + */ + pm->pending_len = len; + pm->pending_chunk = chunk; + break; /* out of while */ + } + } + + mod = mod->next; + } + + /* Don't do any further processing if the buffer was modified - + * otherwise the code will end up modifying a chunk that was + * just added. + */ + if (mod != NULL) + break; /* out of switch */ + } + + /* If we get to here then this chunk may need to be modified. To + * do this it must be less than 1024 bytes in total size, otherwise + * it just gets flushed. + */ + if (len+12 <= sizeof pm->buffer) + { + store_read_imp(&pm->this, pm->buffer+pm->buffer_count, + len+12-pm->buffer_count); + pm->buffer_count = len+12; + + /* Check for a modification, else leave it be. */ + mod = pm->modifications; + while (mod != NULL) + { + if (mod->chunk == chunk) + { + if (mod->modify_fn == NULL) + { + /* Remove this chunk */ + pm->buffer_count = pm->buffer_position = 0; + mod->removed = 1; + break; /* Terminate the while loop */ + } + + else if ((*mod->modify_fn)(pm, mod, 0)) + { + mod->modified = 1; + /* The chunk may have been removed: */ + if (pm->buffer_count == 0) + { + pm->buffer_position = 0; + break; + } + modifier_setbuffer(pm); + } + } + + mod = mod->next; + } + } + + else + pm->flush = len+12 - pm->buffer_count; /* data + crc */ + + /* Take the data from the buffer (if there is any). */ + break; + } + + /* Here to read from the modifier buffer (not directly from + * the store, as in the flush case above.) + */ + cb = pm->buffer_count - pm->buffer_position; + + if (cb > st) + cb = st; + + memcpy(pb, pm->buffer + pm->buffer_position, cb); + st -= cb; + pb += cb; + pm->buffer_position += cb; + } +} + +/* The callback: */ +static void +modifier_read(png_structp pp, png_bytep pb, png_size_t st) +{ + png_modifier *pm = voidcast(png_modifier*, png_get_io_ptr(pp)); + + if (pm == NULL || pm->this.pread != pp) + png_error(pp, "bad modifier_read call"); + + modifier_read_imp(pm, pb, st); +} + +/* Like store_progressive_read but the data is getting changed as we go so we + * need a local buffer. + */ +static void +modifier_progressive_read(png_modifier *pm, png_structp pp, png_infop pi) +{ + if (pm->this.pread != pp || pm->this.current == NULL || + pm->this.next == NULL) + png_error(pp, "store state damaged (progressive)"); + + /* This is another Horowitz and Hill random noise generator. In this case + * the aim is to stress the progressive reader with truly horrible variable + * buffer sizes in the range 1..500, so a sequence of 9 bit random numbers + * is generated. We could probably just count from 1 to 32767 and get as + * good a result. + */ + for (;;) + { + static png_uint_32 noise = 1; + png_size_t cb, cbAvail; + png_byte buffer[512]; + + /* Generate 15 more bits of stuff: */ + noise = (noise << 9) | ((noise ^ (noise >> (9-5))) & 0x1ff); + cb = noise & 0x1ff; + + /* Check that this number of bytes are available (in the current buffer.) + * (This doesn't quite work - the modifier might delete a chunk; unlikely + * but possible, it doesn't happen at present because the modifier only + * adds chunks to standard images.) + */ + cbAvail = store_read_buffer_avail(&pm->this); + if (pm->buffer_count > pm->buffer_position) + cbAvail += pm->buffer_count - pm->buffer_position; + + if (cb > cbAvail) + { + /* Check for EOF: */ + if (cbAvail == 0) + break; + + cb = cbAvail; + } + + modifier_read_imp(pm, buffer, cb); + png_process_data(pp, pi, buffer, cb); + } + + /* Check the invariants at the end (if this fails it's a problem in this + * file!) + */ + if (pm->buffer_count > pm->buffer_position || + pm->this.next != &pm->this.current->data || + pm->this.readpos < pm->this.current->datacount) + png_error(pp, "progressive read implementation error"); +} + +/* Set up a modifier. */ +static png_structp +set_modifier_for_read(png_modifier *pm, png_infopp ppi, png_uint_32 id, + PNG_CONST char *name) +{ + /* Do this first so that the modifier fields are cleared even if an error + * happens allocating the png_struct. No allocation is done here so no + * cleanup is required. + */ + pm->state = modifier_start; + pm->bit_depth = 0; + pm->colour_type = 255; + + pm->pending_len = 0; + pm->pending_chunk = 0; + pm->flush = 0; + pm->buffer_count = 0; + pm->buffer_position = 0; + + return set_store_for_read(&pm->this, ppi, id, name); +} + + +/******************************** MODIFICATIONS *******************************/ +/* Standard modifications to add chunks. These do not require the _SUPPORTED + * macros because the chunks can be there regardless of whether this specific + * libpng supports them. + */ +typedef struct gama_modification +{ + png_modification this; + png_fixed_point gamma; +} gama_modification; + +static int +gama_modify(png_modifier *pm, png_modification *me, int add) +{ + UNUSED(add) + /* This simply dumps the given gamma value into the buffer. */ + png_save_uint_32(pm->buffer, 4); + png_save_uint_32(pm->buffer+4, CHUNK_gAMA); + png_save_uint_32(pm->buffer+8, ((gama_modification*)me)->gamma); + return 1; +} + +static void +gama_modification_init(gama_modification *me, png_modifier *pm, double gammad) +{ + double g; + + modification_init(&me->this); + me->this.chunk = CHUNK_gAMA; + me->this.modify_fn = gama_modify; + me->this.add = CHUNK_PLTE; + g = fix(gammad); + me->gamma = (png_fixed_point)g; + me->this.next = pm->modifications; + pm->modifications = &me->this; +} + +typedef struct chrm_modification +{ + png_modification this; + PNG_CONST color_encoding *encoding; + png_fixed_point wx, wy, rx, ry, gx, gy, bx, by; +} chrm_modification; + +static int +chrm_modify(png_modifier *pm, png_modification *me, int add) +{ + UNUSED(add) + /* As with gAMA this just adds the required cHRM chunk to the buffer. */ + png_save_uint_32(pm->buffer , 32); + png_save_uint_32(pm->buffer+ 4, CHUNK_cHRM); + png_save_uint_32(pm->buffer+ 8, ((chrm_modification*)me)->wx); + png_save_uint_32(pm->buffer+12, ((chrm_modification*)me)->wy); + png_save_uint_32(pm->buffer+16, ((chrm_modification*)me)->rx); + png_save_uint_32(pm->buffer+20, ((chrm_modification*)me)->ry); + png_save_uint_32(pm->buffer+24, ((chrm_modification*)me)->gx); + png_save_uint_32(pm->buffer+28, ((chrm_modification*)me)->gy); + png_save_uint_32(pm->buffer+32, ((chrm_modification*)me)->bx); + png_save_uint_32(pm->buffer+36, ((chrm_modification*)me)->by); + return 1; +} + +static void +chrm_modification_init(chrm_modification *me, png_modifier *pm, + PNG_CONST color_encoding *encoding) +{ + CIE_color white = white_point(encoding); + + /* Original end points: */ + me->encoding = encoding; + + /* Chromaticities (in fixed point): */ + me->wx = fix(chromaticity_x(white)); + me->wy = fix(chromaticity_y(white)); + + me->rx = fix(chromaticity_x(encoding->red)); + me->ry = fix(chromaticity_y(encoding->red)); + me->gx = fix(chromaticity_x(encoding->green)); + me->gy = fix(chromaticity_y(encoding->green)); + me->bx = fix(chromaticity_x(encoding->blue)); + me->by = fix(chromaticity_y(encoding->blue)); + + modification_init(&me->this); + me->this.chunk = CHUNK_cHRM; + me->this.modify_fn = chrm_modify; + me->this.add = CHUNK_PLTE; + me->this.next = pm->modifications; + pm->modifications = &me->this; +} + +typedef struct srgb_modification +{ + png_modification this; + png_byte intent; +} srgb_modification; + +static int +srgb_modify(png_modifier *pm, png_modification *me, int add) +{ + UNUSED(add) + /* As above, ignore add and just make a new chunk */ + png_save_uint_32(pm->buffer, 1); + png_save_uint_32(pm->buffer+4, CHUNK_sRGB); + pm->buffer[8] = ((srgb_modification*)me)->intent; + return 1; +} + +static void +srgb_modification_init(srgb_modification *me, png_modifier *pm, png_byte intent) +{ + modification_init(&me->this); + me->this.chunk = CHUNK_sBIT; + + if (intent <= 3) /* if valid, else *delete* sRGB chunks */ + { + me->this.modify_fn = srgb_modify; + me->this.add = CHUNK_PLTE; + me->intent = intent; + } + + else + { + me->this.modify_fn = 0; + me->this.add = 0; + me->intent = 0; + } + + me->this.next = pm->modifications; + pm->modifications = &me->this; +} + +typedef struct sbit_modification +{ + png_modification this; + png_byte sbit; +} sbit_modification; + +static int +sbit_modify(png_modifier *pm, png_modification *me, int add) +{ + png_byte sbit = ((sbit_modification*)me)->sbit; + if (pm->bit_depth > sbit) + { + int cb = 0; + switch (pm->colour_type) + { + case 0: + cb = 1; + break; + + case 2: + case 3: + cb = 3; + break; + + case 4: + cb = 2; + break; + + case 6: + cb = 4; + break; + + default: + png_error(pm->this.pread, + "unexpected colour type in sBIT modification"); + } + + png_save_uint_32(pm->buffer, cb); + png_save_uint_32(pm->buffer+4, CHUNK_sBIT); + + while (cb > 0) + (pm->buffer+8)[--cb] = sbit; + + return 1; + } + else if (!add) + { + /* Remove the sBIT chunk */ + pm->buffer_count = pm->buffer_position = 0; + return 1; + } + else + return 0; /* do nothing */ +} + +static void +sbit_modification_init(sbit_modification *me, png_modifier *pm, png_byte sbit) +{ + modification_init(&me->this); + me->this.chunk = CHUNK_sBIT; + me->this.modify_fn = sbit_modify; + me->this.add = CHUNK_PLTE; + me->sbit = sbit; + me->this.next = pm->modifications; + pm->modifications = &me->this; +} +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ + +/***************************** STANDARD PNG FILES *****************************/ +/* Standard files - write and save standard files. */ +/* There are two basic forms of standard images. Those which attempt to have + * all the possible pixel values (not possible for 16bpp images, but a range of + * values are produced) and those which have a range of image sizes. The former + * are used for testing transforms, in particular gamma correction and bit + * reduction and increase. The latter are reserved for testing the behavior of + * libpng with respect to 'odd' image sizes - particularly small images where + * rows become 1 byte and interlace passes disappear. + * + * The first, most useful, set are the 'transform' images, the second set of + * small images are the 'size' images. + * + * The transform files are constructed with rows which fit into a 1024 byte row + * buffer. This makes allocation easier below. Further regardless of the file + * format every row has 128 pixels (giving 1024 bytes for 64bpp formats). + * + * Files are stored with no gAMA or sBIT chunks, with a PLTE only when needed + * and with an ID derived from the colour type, bit depth and interlace type + * as above (FILEID). The width (128) and height (variable) are not stored in + * the FILEID - instead the fields are set to 0, indicating a transform file. + * + * The size files ar constructed with rows a maximum of 128 bytes wide, allowing + * a maximum width of 16 pixels (for the 64bpp case.) They also have a maximum + * height of 16 rows. The width and height are stored in the FILEID and, being + * non-zero, indicate a size file. + * + * For palette image (colour type 3) multiple transform images are stored with + * the same bit depth to allow testing of more colour combinations - + * particularly important for testing the gamma code because libpng uses a + * different code path for palette images. For size images a single palette is + * used. + */ + +/* Make a 'standard' palette. Because there are only 256 entries in a palette + * (maximum) this actually makes a random palette in the hope that enough tests + * will catch enough errors. (Note that the same palette isn't produced every + * time for the same test - it depends on what previous tests have been run - + * but a given set of arguments to pngvalid will always produce the same palette + * at the same test! This is why pseudo-random number generators are useful for + * testing.) + * + * The store must be open for write when this is called, otherwise an internal + * error will occur. This routine contains its own magic number seed, so the + * palettes generated don't change if there are intervening errors (changing the + * calls to the store_mark seed.) + */ +static store_palette_entry * +make_standard_palette(png_store* ps, int npalette, int do_tRNS) +{ + static png_uint_32 palette_seed[2] = { 0x87654321, 9 }; + + int i = 0; + png_byte values[256][4]; + + /* Always put in black and white plus the six primary and secondary colors. + */ + for (; i<8; ++i) + { + values[i][1] = (i&1) ? 255 : 0; + values[i][2] = (i&2) ? 255 : 0; + values[i][3] = (i&4) ? 255 : 0; + } + + /* Then add 62 grays (one quarter of the remaining 256 slots). */ + { + int j = 0; + png_byte random_bytes[4]; + png_byte need[256]; + + need[0] = 0; /*got black*/ + memset(need+1, 1, (sizeof need)-2); /*need these*/ + need[255] = 0; /*but not white*/ + + while (i<70) + { + png_byte b; + + if (j==0) + { + make_four_random_bytes(palette_seed, random_bytes); + j = 4; + } + + b = random_bytes[--j]; + if (need[b]) + { + values[i][1] = b; + values[i][2] = b; + values[i++][3] = b; + } + } + } + + /* Finally add 192 colors at random - don't worry about matches to things we + * already have, chance is less than 1/65536. Don't worry about grays, + * chance is the same, so we get a duplicate or extra gray less than 1 time + * in 170. + */ + for (; i<256; ++i) + make_four_random_bytes(palette_seed, values[i]); + + /* Fill in the alpha values in the first byte. Just use all possible values + * (0..255) in an apparently random order: + */ + { + store_palette_entry *palette; + png_byte selector[4]; + + make_four_random_bytes(palette_seed, selector); + + if (do_tRNS) + for (i=0; i<256; ++i) + values[i][0] = (png_byte)(i ^ selector[0]); + + else + for (i=0; i<256; ++i) + values[i][0] = 255; /* no transparency/tRNS chunk */ + + /* 'values' contains 256 ARGB values, but we only need 'npalette'. + * 'npalette' will always be a power of 2: 2, 4, 16 or 256. In the low + * bit depth cases select colors at random, else it is difficult to have + * a set of low bit depth palette test with any chance of a reasonable + * range of colors. Do this by randomly permuting values into the low + * 'npalette' entries using an XOR mask generated here. This also + * permutes the npalette == 256 case in a potentially useful way (there is + * no relationship between palette index and the color value therein!) + */ + palette = store_write_palette(ps, npalette); + + for (i=0; i 0) + png_set_tRNS(pp, pi, tRNS, j, 0/*color*/); + } +} + +/* The number of passes is related to the interlace type. There was no libpng + * API to determine this prior to 1.5, so we need an inquiry function: + */ +static int +npasses_from_interlace_type(png_structp pp, int interlace_type) +{ + switch (interlace_type) + { + default: + png_error(pp, "invalid interlace type"); + + case PNG_INTERLACE_NONE: + return 1; + + case PNG_INTERLACE_ADAM7: + return PNG_INTERLACE_ADAM7_PASSES; + } +} + +static unsigned int +bit_size(png_structp pp, png_byte colour_type, png_byte bit_depth) +{ + switch (colour_type) + { + default: png_error(pp, "invalid color type"); + + case 0: return bit_depth; + + case 2: return 3*bit_depth; + + case 3: return bit_depth; + + case 4: return 2*bit_depth; + + case 6: return 4*bit_depth; + } +} + +#define TRANSFORM_WIDTH 128U +#define TRANSFORM_ROWMAX (TRANSFORM_WIDTH*8U) +#define SIZE_ROWMAX (16*8U) /* 16 pixels, max 8 bytes each - 128 bytes */ +#define STANDARD_ROWMAX TRANSFORM_ROWMAX /* The larger of the two */ +#define SIZE_HEIGHTMAX 16 /* Maximum range of size images */ + +static size_t +transform_rowsize(png_structp pp, png_byte colour_type, png_byte bit_depth) +{ + return (TRANSFORM_WIDTH * bit_size(pp, colour_type, bit_depth)) / 8; +} + +/* transform_width(pp, colour_type, bit_depth) current returns the same number + * every time, so just use a macro: + */ +#define transform_width(pp, colour_type, bit_depth) TRANSFORM_WIDTH + +static png_uint_32 +transform_height(png_structp pp, png_byte colour_type, png_byte bit_depth) +{ + switch (bit_size(pp, colour_type, bit_depth)) + { + case 1: + case 2: + case 4: + return 1; /* Total of 128 pixels */ + + case 8: + return 2; /* Total of 256 pixels/bytes */ + + case 16: + return 512; /* Total of 65536 pixels */ + + case 24: + case 32: + return 512; /* 65536 pixels */ + + case 48: + case 64: + return 2048;/* 4 x 65536 pixels. */ +# define TRANSFORM_HEIGHTMAX 2048 + + default: + return 0; /* Error, will be caught later */ + } +} + +/* The following can only be defined here, now we have the definitions + * of the transform image sizes. + */ +static png_uint_32 +standard_width(png_structp pp, png_uint_32 id) +{ + png_uint_32 width = WIDTH_FROM_ID(id); + UNUSED(pp) + + if (width == 0) + width = transform_width(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); + + return width; +} + +static png_uint_32 +standard_height(png_structp pp, png_uint_32 id) +{ + png_uint_32 height = HEIGHT_FROM_ID(id); + + if (height == 0) + height = transform_height(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); + + return height; +} + +static png_uint_32 +standard_rowsize(png_structp pp, png_uint_32 id) +{ + png_uint_32 width = standard_width(pp, id); + + /* This won't overflow: */ + width *= bit_size(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); + return (width + 7) / 8; +} + +static void +transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], + png_byte colour_type, png_byte bit_depth, png_uint_32 y) +{ + png_uint_32 v = y << 7; + png_uint_32 i = 0; + + switch (bit_size(pp, colour_type, bit_depth)) + { + case 1: + while (i<128/8) buffer[i] = v & 0xff, v += 17, ++i; + return; + + case 2: + while (i<128/4) buffer[i] = v & 0xff, v += 33, ++i; + return; + + case 4: + while (i<128/2) buffer[i] = v & 0xff, v += 65, ++i; + return; + + case 8: + /* 256 bytes total, 128 bytes in each row set as follows: */ + while (i<128) buffer[i] = v & 0xff, ++v, ++i; + return; + + case 16: + /* Generate all 65536 pixel values in order, which includes the 8 bit + * GA case as well as the 16 bit G case. + */ + while (i<128) + buffer[2*i] = (v>>8) & 0xff, buffer[2*i+1] = v & 0xff, ++v, ++i; + + return; + + case 24: + /* 65535 pixels, but rotate the values. */ + while (i<128) + { + /* Three bytes per pixel, r, g, b, make b by r^g */ + buffer[3*i+0] = (v >> 8) & 0xff; + buffer[3*i+1] = v & 0xff; + buffer[3*i+2] = ((v >> 8) ^ v) & 0xff; + ++v; + ++i; + } + + return; + + case 32: + /* 65535 pixels, r, g, b, a; just replicate */ + while (i<128) + { + buffer[4*i+0] = (v >> 8) & 0xff; + buffer[4*i+1] = v & 0xff; + buffer[4*i+2] = (v >> 8) & 0xff; + buffer[4*i+3] = v & 0xff; + ++v; + ++i; + } + + return; + + case 48: + /* y is maximum 2047, giving 4x65536 pixels, make 'r' increase by 1 at + * each pixel, g increase by 257 (0x101) and 'b' by 0x1111: + */ + while (i<128) + { + png_uint_32 t = v++; + buffer[6*i+0] = (t >> 8) & 0xff; + buffer[6*i+1] = t & 0xff; + t *= 257; + buffer[6*i+2] = (t >> 8) & 0xff; + buffer[6*i+3] = t & 0xff; + t *= 17; + buffer[6*i+4] = (t >> 8) & 0xff; + buffer[6*i+5] = t & 0xff; + ++i; + } + + return; + + case 64: + /* As above in the 32 bit case. */ + while (i<128) + { + png_uint_32 t = v++; + buffer[8*i+0] = (t >> 8) & 0xff; + buffer[8*i+1] = t & 0xff; + buffer[8*i+4] = (t >> 8) & 0xff; + buffer[8*i+5] = t & 0xff; + t *= 257; + buffer[8*i+2] = (t >> 8) & 0xff; + buffer[8*i+3] = t & 0xff; + buffer[8*i+6] = (t >> 8) & 0xff; + buffer[8*i+7] = t & 0xff; + ++i; + } + return; + + default: + break; + } + + png_error(pp, "internal error"); +} + +/* This is just to do the right cast - could be changed to a function to check + * 'bd' but there isn't much point. + */ +#define DEPTH(bd) ((png_byte)(1U << (bd))) + +/* Make a standardized image given a an image colour type, bit depth and + * interlace type. The standard images have a very restricted range of + * rows and heights and are used for testing transforms rather than image + * layout details. See make_size_images below for a way to make images + * that test odd sizes along with the libpng interlace handling. + */ +static void +make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, + png_byte PNG_CONST bit_depth, int palette_number, int interlace_type, + png_const_charp name) +{ + context(ps, fault); + + Try + { + png_infop pi; + png_structp pp = set_store_for_write(ps, &pi, name); + png_uint_32 h; + + /* In the event of a problem return control to the Catch statement below + * to do the clean up - it is not possible to 'return' directly from a Try + * block. + */ + if (pp == NULL) + Throw ps; + + h = transform_height(pp, colour_type, bit_depth); + + png_set_IHDR(pp, pi, transform_width(pp, colour_type, bit_depth), h, + bit_depth, colour_type, interlace_type, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + +#ifdef PNG_TEXT_SUPPORTED + { + static char key[] = "image name"; /* must be writeable */ + size_t pos; + png_text text; + char copy[FILE_NAME_SIZE]; + + /* Use a compressed text string to test the correct interaction of text + * compression and IDAT compression. + */ + text.compression = PNG_TEXT_COMPRESSION_zTXt; + text.key = key; + /* Yuck: the text must be writable! */ + pos = safecat(copy, sizeof copy, 0, ps->wname); + text.text = copy; + text.text_length = pos; + text.itxt_length = 0; + text.lang = 0; + text.lang_key = 0; + + png_set_text(pp, pi, &text, 1); + } +#endif + + if (colour_type == 3) /* palette */ + init_standard_palette(ps, pp, pi, 1U << bit_depth, 1/*do tRNS*/); + + png_write_info(pp, pi); + + if (png_get_rowbytes(pp, pi) != + transform_rowsize(pp, colour_type, bit_depth)) + png_error(pp, "row size incorrect"); + + else + { + /* Somewhat confusingly this must be called *after* png_write_info + * because if it is called before, the information in *pp has not been + * updated to reflect the interlaced image. + */ + int npasses = png_set_interlace_handling(pp); + int pass; + + if (npasses != npasses_from_interlace_type(pp, interlace_type)) + png_error(pp, "write: png_set_interlace_handling failed"); + + for (pass=0; passtest, sizeof ps->test, 0, "make standard images"); + + /* Use next_format to enumerate all the combinations we test, including + * generating multiple low bit depth palette images. + */ + while (next_format(&colour_type, &bit_depth, &palette_number)) + { + int interlace_type; + + for (interlace_type = PNG_INTERLACE_NONE; + interlace_type < PNG_INTERLACE_LAST; ++interlace_type) + { + char name[FILE_NAME_SIZE]; + + standard_name(name, sizeof name, 0, colour_type, bit_depth, + palette_number, interlace_type, 0, 0, 0); + make_transform_image(ps, colour_type, bit_depth, palette_number, + interlace_type, name); + } + } +} + +/* The following two routines use the PNG interlace support macros from + * png.h to interlace or deinterlace rows. + */ +static void +interlace_row(png_bytep buffer, png_const_bytep imageRow, + unsigned int pixel_size, png_uint_32 w, int pass) +{ + png_uint_32 xin, xout, xstep; + + /* Note that this can, trivially, be optimized to a memcpy on pass 7, the + * code is presented this way to make it easier to understand. In practice + * consult the code in the libpng source to see other ways of doing this. + */ + xin = PNG_PASS_START_COL(pass); + xstep = 1U<= 8) + *buffer++ = (png_byte)y++, bit_width -= 8; + + /* There may be up to 7 remaining bits, these go in the most significant + * bits of the byte. + */ + if (bit_width > 0) + { + png_uint_32 mask = (1U<<(8-bit_width))-1; + *buffer = (png_byte)((*buffer & mask) | (y & ~mask)); + } +} + +static void +make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, + png_byte PNG_CONST bit_depth, int PNG_CONST interlace_type, + png_uint_32 PNG_CONST w, png_uint_32 PNG_CONST h, + int PNG_CONST do_interlace) +{ + context(ps, fault); + + Try + { + png_infop pi; + png_structp pp; + unsigned int pixel_size; + + /* Make a name and get an appropriate id for the store: */ + char name[FILE_NAME_SIZE]; + PNG_CONST png_uint_32 id = FILEID(colour_type, bit_depth, 0/*palette*/, + interlace_type, w, h, do_interlace); + + standard_name_from_id(name, sizeof name, 0, id); + pp = set_store_for_write(ps, &pi, name); + + /* In the event of a problem return control to the Catch statement below + * to do the clean up - it is not possible to 'return' directly from a Try + * block. + */ + if (pp == NULL) + Throw ps; + + png_set_IHDR(pp, pi, w, h, bit_depth, colour_type, interlace_type, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + if (colour_type == 3) /* palette */ + init_standard_palette(ps, pp, pi, 1U << bit_depth, 0/*do tRNS*/); + + png_write_info(pp, pi); + + /* Calculate the bit size, divide by 8 to get the byte size - this won't + * overflow because we know the w values are all small enough even for + * a system where 'unsigned int' is only 16 bits. + */ + pixel_size = bit_size(pp, colour_type, bit_depth); + if (png_get_rowbytes(pp, pi) != ((w * pixel_size) + 7) / 8) + png_error(pp, "row size incorrect"); + + else + { + int npasses = npasses_from_interlace_type(pp, interlace_type); + png_uint_32 y; + int pass; + png_byte image[16][SIZE_ROWMAX]; + + /* To help consistent error detection make the parts of this buffer + * that aren't set below all '1': + */ + memset(image, 0xff, sizeof image); + + if (!do_interlace && npasses != png_set_interlace_handling(pp)) + png_error(pp, "write: png_set_interlace_handling failed"); + + /* Prepare the whole image first to avoid making it 7 times: */ + for (y=0; y 0) + { + /* Set to all 1's for error detection (libpng tends to + * set unset things to 0). + */ + memset(tempRow, 0xff, sizeof tempRow); + interlace_row(tempRow, row, pixel_size, w, pass); + row = tempRow; + } + else + continue; + } + + /* Only get to here if the row has some pixels in it. */ + png_write_row(pp, row); + } + } + } + + png_write_end(pp, pi); + + /* And store this under the appropriate id, then clean up. */ + store_storefile(ps, id); + + store_write_reset(ps); + } + + Catch(fault) + { + /* Use the png_store returned by the exception. This may help the compiler + * because 'ps' is not used in this branch of the setjmp. Note that fault + * and ps will always be the same value. + */ + store_write_reset(fault); + } +} + +static void +make_size(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, int bdlo, + int PNG_CONST bdhi) +{ + for (; bdlo <= bdhi; ++bdlo) + { + png_uint_32 width; + + for (width = 1; width <= 16; ++width) + { + png_uint_32 height; + + for (height = 1; height <= 16; ++height) + { + /* The four combinations of DIY interlace and interlace or not - + * no interlace + DIY should be identical to no interlace with + * libpng doing it. + */ + make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE, + width, height, 0); + make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE, + width, height, 1); + make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7, + width, height, 0); + make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7, + width, height, 1); + } + } + } +} + +static void +make_size_images(png_store *ps) +{ + /* This is in case of errors. */ + safecat(ps->test, sizeof ps->test, 0, "make size images"); + + /* Arguments are colour_type, low bit depth, high bit depth + */ + make_size(ps, 0, 0, WRITE_BDHI); + make_size(ps, 2, 3, WRITE_BDHI); + make_size(ps, 3, 0, 3 /*palette: max 8 bits*/); + make_size(ps, 4, 3, WRITE_BDHI); + make_size(ps, 6, 3, WRITE_BDHI); +} + +/* Return a row based on image id and 'y' for checking: */ +static void +standard_row(png_structp pp, png_byte std[STANDARD_ROWMAX], png_uint_32 id, + png_uint_32 y) +{ + if (WIDTH_FROM_ID(id) == 0) + transform_row(pp, std, COL_FROM_ID(id), DEPTH_FROM_ID(id), y); + else + size_row(std, WIDTH_FROM_ID(id) * bit_size(pp, COL_FROM_ID(id), + DEPTH_FROM_ID(id)), y); +} + +/* Tests - individual test cases */ +/* Like 'make_standard' but errors are deliberately introduced into the calls + * to ensure that they get detected - it should not be possible to write an + * invalid image with libpng! + */ +#ifdef PNG_WARNINGS_SUPPORTED +static void +sBIT0_error_fn(png_structp pp, png_infop pi) +{ + /* 0 is invalid... */ + png_color_8 bad; + bad.red = bad.green = bad.blue = bad.gray = bad.alpha = 0; + png_set_sBIT(pp, pi, &bad); +} + +static void +sBIT_error_fn(png_structp pp, png_infop pi) +{ + png_byte bit_depth; + png_color_8 bad; + + if (png_get_color_type(pp, pi) == PNG_COLOR_TYPE_PALETTE) + bit_depth = 8; + + else + bit_depth = png_get_bit_depth(pp, pi); + + /* Now we know the bit depth we can easily generate an invalid sBIT entry */ + bad.red = bad.green = bad.blue = bad.gray = bad.alpha = + (png_byte)(bit_depth+1); + png_set_sBIT(pp, pi, &bad); +} + +static PNG_CONST struct +{ + void (*fn)(png_structp, png_infop); + PNG_CONST char *msg; + unsigned int warning :1; /* the error is a warning... */ +} error_test[] = + { + /* no warnings makes these errors undetectable. */ + { sBIT0_error_fn, "sBIT(0): failed to detect error", 1 }, + { sBIT_error_fn, "sBIT(too big): failed to detect error", 1 }, + }; + +static void +make_error(png_store* volatile ps, png_byte PNG_CONST colour_type, + png_byte bit_depth, int interlace_type, int test, png_const_charp name) +{ + context(ps, fault); + + Try + { + png_structp pp; + png_infop pi; + + pp = set_store_for_write(ps, &pi, name); + + if (pp == NULL) + Throw ps; + + png_set_IHDR(pp, pi, transform_width(pp, colour_type, bit_depth), + transform_height(pp, colour_type, bit_depth), bit_depth, colour_type, + interlace_type, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + if (colour_type == 3) /* palette */ + init_standard_palette(ps, pp, pi, 1U << bit_depth, 0/*do tRNS*/); + + /* Time for a few errors; these are in various optional chunks, the + * standard tests test the standard chunks pretty well. + */ +# define exception__prev exception_prev_1 +# define exception__env exception_env_1 + Try + { + /* Expect this to throw: */ + ps->expect_error = !error_test[test].warning; + ps->expect_warning = error_test[test].warning; + ps->saw_warning = 0; + error_test[test].fn(pp, pi); + + /* Normally the error is only detected here: */ + png_write_info(pp, pi); + + /* And handle the case where it was only a warning: */ + if (ps->expect_warning && ps->saw_warning) + Throw ps; + + /* If we get here there is a problem, we have success - no error or + * no warning - when we shouldn't have success. Log an error. + */ + store_log(ps, pp, error_test[test].msg, 1 /*error*/); + } + + Catch (fault) + ps = fault; /* expected exit, make sure ps is not clobbered */ +#undef exception__prev +#undef exception__env + + /* And clear these flags */ + ps->expect_error = 0; + ps->expect_warning = 0; + + /* Now write the whole image, just to make sure that the detected, or + * undetected, errro has not created problems inside libpng. + */ + if (png_get_rowbytes(pp, pi) != + transform_rowsize(pp, colour_type, bit_depth)) + png_error(pp, "row size incorrect"); + + else + { + png_uint_32 h = transform_height(pp, colour_type, bit_depth); + int npasses = png_set_interlace_handling(pp); + int pass; + + if (npasses != npasses_from_interlace_type(pp, interlace_type)) + png_error(pp, "write: png_set_interlace_handling failed"); + + for (pass=0; passthis, colour_type, DEPTH(bdlo), interlace_type, + test, name); + + if (fail(pm)) + return 0; + } + } + } + + return 1; /* keep going */ +} +#endif + +static void +perform_error_test(png_modifier *pm) +{ +#ifdef PNG_WARNINGS_SUPPORTED /* else there are no cases that work! */ + /* Need to do this here because we just write in this test. */ + safecat(pm->this.test, sizeof pm->this.test, 0, "error test"); + + if (!make_errors(pm, 0, 0, WRITE_BDHI)) + return; + + if (!make_errors(pm, 2, 3, WRITE_BDHI)) + return; + + if (!make_errors(pm, 3, 0, 3)) + return; + + if (!make_errors(pm, 4, 3, WRITE_BDHI)) + return; + + if (!make_errors(pm, 6, 3, WRITE_BDHI)) + return; +#else + UNUSED(pm) +#endif +} + +/* This is just to validate the internal PNG formatting code - if this fails + * then the warning messages the library outputs will probably be garbage. + */ +static void +perform_formatting_test(png_store *volatile ps) +{ +#ifdef PNG_TIME_RFC1123_SUPPORTED + /* The handle into the formatting code is the RFC1123 support; this test does + * nothing if that is compiled out. + */ + context(ps, fault); + + Try + { + png_const_charp correct = "29 Aug 2079 13:53:60 +0000"; + png_const_charp result; + png_structp pp; + png_time pt; + + pp = set_store_for_write(ps, NULL, "libpng formatting test"); + + if (pp == NULL) + Throw ps; + + + /* Arbitrary settings: */ + pt.year = 2079; + pt.month = 8; + pt.day = 29; + pt.hour = 13; + pt.minute = 53; + pt.second = 60; /* a leap second */ + + result = png_convert_to_rfc1123(pp, &pt); + + if (result == NULL) + png_error(pp, "png_convert_to_rfc1123 failed"); + + if (strcmp(result, correct) != 0) + { + size_t pos = 0; + char msg[128]; + + pos = safecat(msg, sizeof msg, pos, "png_convert_to_rfc1123("); + pos = safecat(msg, sizeof msg, pos, correct); + pos = safecat(msg, sizeof msg, pos, ") returned: '"); + pos = safecat(msg, sizeof msg, pos, result); + pos = safecat(msg, sizeof msg, pos, "'"); + + png_error(pp, msg); + } + + store_write_reset(ps); + } + + Catch(fault) + { + store_write_reset(fault); + } +#else + UNUSED(ps) +#endif +} + +/* Because we want to use the same code in both the progressive reader and the + * sequential reader it is necessary to deal with the fact that the progressive + * reader callbacks only have one parameter (png_get_progressive_ptr()), so this + * must contain all the test parameters and all the local variables directly + * accessible to the sequential reader implementation. + * + * The technique adopted is to reinvent part of what Dijkstra termed a + * 'display'; an array of pointers to the stack frames of enclosing functions so + * that a nested function definition can access the local (C auto) variables of + * the functions that contain its definition. In fact C provides the first + * pointer (the local variables - the stack frame pointer) and the last (the + * global variables - the BCPL global vector typically implemented as global + * addresses), this code requires one more pointer to make the display - the + * local variables (and function call parameters) of the function that actually + * invokes either the progressive or sequential reader. + * + * Perhaps confusingly this technique is confounded with classes - the + * 'standard_display' defined here is sub-classed as the 'gamma_display' below. + * A gamma_display is a standard_display, taking advantage of the ANSI-C + * requirement that the pointer to the first member of a structure must be the + * same as the pointer to the structure. This allows us to reuse standard_ + * functions in the gamma test code; something that could not be done with + * nested functions! + */ +typedef struct standard_display +{ + png_store* ps; /* Test parameters (passed to the function) */ + png_byte colour_type; + png_byte bit_depth; + png_byte red_sBIT; /* Input data sBIT values. */ + png_byte green_sBIT; + png_byte blue_sBIT; + png_byte alpha_sBIT; + int interlace_type; + png_uint_32 id; /* Calculated file ID */ + png_uint_32 w; /* Width of image */ + png_uint_32 h; /* Height of image */ + int npasses; /* Number of interlaced passes */ + png_uint_32 pixel_size; /* Width of one pixel in bits */ + png_uint_32 bit_width; /* Width of output row in bits */ + size_t cbRow; /* Bytes in a row of the output image */ + int do_interlace; /* Do interlacing internally */ + int is_transparent; /* Transparency information was present. */ + int speed; /* Doing a speed test */ + int use_update_info;/* Call update_info, not start_image */ + struct + { + png_uint_16 red; + png_uint_16 green; + png_uint_16 blue; + } transparent; /* The transparent color, if set. */ + int npalette; /* Number of entries in the palette. */ + store_palette + palette; +} standard_display; + +static void +standard_display_init(standard_display *dp, png_store* ps, png_uint_32 id, + int do_interlace, int use_update_info) +{ + memset(dp, 0, sizeof *dp); + + dp->ps = ps; + dp->colour_type = COL_FROM_ID(id); + dp->bit_depth = DEPTH_FROM_ID(id); + if (dp->colour_type == 3) + dp->red_sBIT = dp->blue_sBIT = dp->green_sBIT = dp->alpha_sBIT = 8; + else + dp->red_sBIT = dp->blue_sBIT = dp->green_sBIT = dp->alpha_sBIT = + dp->bit_depth; + dp->interlace_type = INTERLACE_FROM_ID(id); + dp->id = id; + /* All the rest are filled in after the read_info: */ + dp->w = 0; + dp->h = 0; + dp->npasses = 0; + dp->pixel_size = 0; + dp->bit_width = 0; + dp->cbRow = 0; + dp->do_interlace = do_interlace; + dp->is_transparent = 0; + dp->speed = ps->speed; + dp->use_update_info = use_update_info; + dp->npalette = 0; + /* Preset the transparent color to black: */ + memset(&dp->transparent, 0, sizeof dp->transparent); + /* Preset the palette to full intensity/opaque througout: */ + memset(dp->palette, 0xff, sizeof dp->palette); +} + +/* Initialize the palette fields - this must be done later because the palette + * comes from the particular png_store_file that is selected. + */ +static void +standard_palette_init(standard_display *dp) +{ + store_palette_entry *palette = store_current_palette(dp->ps, &dp->npalette); + + /* The remaining entries remain white/opaque. */ + if (dp->npalette > 0) + { + int i = dp->npalette; + memcpy(dp->palette, palette, i * sizeof *palette); + + /* Check for a non-opaque palette entry: */ + while (--i >= 0) + if (palette[i].alpha < 255) + break; + +# ifdef __GNUC__ + /* GCC can't handle the more obviously optimizable version. */ + if (i >= 0) + dp->is_transparent = 1; + else + dp->is_transparent = 0; +# else + dp->is_transparent = (i >= 0); +# endif + } +} + +/* Utility to read the palette from the PNG file and convert it into + * store_palette format. This returns 1 if there is any transparency in the + * palette (it does not check for a transparent colour in the non-palette case.) + */ +static int +read_palette(store_palette palette, int *npalette, png_structp pp, png_infop pi) +{ + png_colorp pal; + png_bytep trans_alpha; + int num; + + pal = 0; + *npalette = -1; + + if (png_get_PLTE(pp, pi, &pal, npalette) & PNG_INFO_PLTE) + { + int i = *npalette; + + if (i <= 0 || i > 256) + png_error(pp, "validate: invalid PLTE count"); + + while (--i >= 0) + { + palette[i].red = pal[i].red; + palette[i].green = pal[i].green; + palette[i].blue = pal[i].blue; + } + + /* Mark the remainder of the entries with a flag value (other than + * white/opaque which is the flag value stored above.) + */ + memset(palette + *npalette, 126, (256-*npalette) * sizeof *palette); + } + + else /* !png_get_PLTE */ + { + if (*npalette != (-1)) + png_error(pp, "validate: invalid PLTE result"); + /* But there is no palette, so record this: */ + *npalette = 0; + memset(palette, 113, sizeof palette); + } + + trans_alpha = 0; + num = 2; /* force error below */ + if ((png_get_tRNS(pp, pi, &trans_alpha, &num, 0) & PNG_INFO_tRNS) != 0 && + (trans_alpha != NULL || num != 1/*returns 1 for a transparent color*/) && + /* Oops, if a palette tRNS gets expanded png_read_update_info (at least so + * far as 1.5.4) does not remove the trans_alpha pointer, only num_trans, + * so in the above call we get a success, we get a pointer (who knows what + * to) and we get num_trans == 0: + */ + !(trans_alpha != NULL && num == 0)) /* TODO: fix this in libpng. */ + { + int i; + + /* Any of these are crash-worthy - given the implementation of + * png_get_tRNS up to 1.5 an app won't crash if it just checks the + * result above and fails to check that the variables it passed have + * actually been filled in! Note that if the app were to pass the + * last, png_color_16p, variable too it couldn't rely on this. + */ + if (trans_alpha == NULL || num <= 0 || num > 256 || num > *npalette) + png_error(pp, "validate: unexpected png_get_tRNS (palette) result"); + + for (i=0; iis_transparent) + png_error(pp, "validate: palette transparency changed"); + + if (npalette != dp->npalette) + { + size_t pos = 0; + char msg[64]; + + pos = safecat(msg, sizeof msg, pos, "validate: palette size changed: "); + pos = safecatn(msg, sizeof msg, pos, dp->npalette); + pos = safecat(msg, sizeof msg, pos, " -> "); + pos = safecatn(msg, sizeof msg, pos, npalette); + png_error(pp, msg); + } + + { + int i = npalette; /* npalette is aliased */ + + while (--i >= 0) + if (palette[i].red != dp->palette[i].red || + palette[i].green != dp->palette[i].green || + palette[i].blue != dp->palette[i].blue || + palette[i].alpha != dp->palette[i].alpha) + png_error(pp, "validate: PLTE or tRNS chunk changed"); + } +} + +/* By passing a 'standard_display' the progressive callbacks can be used + * directly by the sequential code, the functions suffixed "_imp" are the + * implementations, the functions without the suffix are the callbacks. + * + * The code for the info callback is split into two because this callback calls + * png_read_update_info or png_start_read_image and what gets called depends on + * whether the info needs updating (we want to test both calls in pngvalid.) + */ +static void +standard_info_part1(standard_display *dp, png_structp pp, png_infop pi) +{ + if (png_get_bit_depth(pp, pi) != dp->bit_depth) + png_error(pp, "validate: bit depth changed"); + + if (png_get_color_type(pp, pi) != dp->colour_type) + png_error(pp, "validate: color type changed"); + + if (png_get_filter_type(pp, pi) != PNG_FILTER_TYPE_BASE) + png_error(pp, "validate: filter type changed"); + + if (png_get_interlace_type(pp, pi) != dp->interlace_type) + png_error(pp, "validate: interlacing changed"); + + if (png_get_compression_type(pp, pi) != PNG_COMPRESSION_TYPE_BASE) + png_error(pp, "validate: compression type changed"); + + dp->w = png_get_image_width(pp, pi); + + if (dp->w != standard_width(pp, dp->id)) + png_error(pp, "validate: image width changed"); + + dp->h = png_get_image_height(pp, pi); + + if (dp->h != standard_height(pp, dp->id)) + png_error(pp, "validate: image height changed"); + + /* Record (but don't check at present) the input sBIT according to the colour + * type information. + */ + { + png_color_8p sBIT = 0; + + if (png_get_sBIT(pp, pi, &sBIT) & PNG_INFO_sBIT) + { + int sBIT_invalid = 0; + + if (sBIT == 0) + png_error(pp, "validate: unexpected png_get_sBIT result"); + + if (dp->colour_type & PNG_COLOR_MASK_COLOR) + { + if (sBIT->red == 0 || sBIT->red > dp->bit_depth) + sBIT_invalid = 1; + else + dp->red_sBIT = sBIT->red; + + if (sBIT->green == 0 || sBIT->green > dp->bit_depth) + sBIT_invalid = 1; + else + dp->green_sBIT = sBIT->green; + + if (sBIT->blue == 0 || sBIT->blue > dp->bit_depth) + sBIT_invalid = 1; + else + dp->blue_sBIT = sBIT->blue; + } + + else /* !COLOR */ + { + if (sBIT->gray == 0 || sBIT->gray > dp->bit_depth) + sBIT_invalid = 1; + else + dp->blue_sBIT = dp->green_sBIT = dp->red_sBIT = sBIT->gray; + } + + /* All 8 bits in tRNS for a palette image are significant - see the + * spec. + */ + if (dp->colour_type & PNG_COLOR_MASK_ALPHA) + { + if (sBIT->alpha == 0 || sBIT->alpha > dp->bit_depth) + sBIT_invalid = 1; + else + dp->alpha_sBIT = sBIT->alpha; + } + + if (sBIT_invalid) + png_error(pp, "validate: sBIT value out of range"); + } + } + + /* Important: this is validating the value *before* any transforms have been + * put in place. It doesn't matter for the standard tests, where there are + * no transforms, but it does for other tests where rowbytes may change after + * png_read_update_info. + */ + if (png_get_rowbytes(pp, pi) != standard_rowsize(pp, dp->id)) + png_error(pp, "validate: row size changed"); + + /* Validate the colour type 3 palette (this can be present on other color + * types.) + */ + standard_palette_validate(dp, pp, pi); + + /* In any case always check for a tranparent color (notice that the + * colour type 3 case must not give a successful return on the get_tRNS call + * with these arguments!) + */ + { + png_color_16p trans_color = 0; + + if (png_get_tRNS(pp, pi, 0, 0, &trans_color) & PNG_INFO_tRNS) + { + if (trans_color == 0) + png_error(pp, "validate: unexpected png_get_tRNS (color) result"); + + switch (dp->colour_type) + { + case 0: + dp->transparent.red = dp->transparent.green = dp->transparent.blue = + trans_color->gray; + dp->is_transparent = 1; + break; + + case 2: + dp->transparent.red = trans_color->red; + dp->transparent.green = trans_color->green; + dp->transparent.blue = trans_color->blue; + dp->is_transparent = 1; + break; + + case 3: + /* Not expected because it should result in the array case + * above. + */ + png_error(pp, "validate: unexpected png_get_tRNS result"); + break; + + default: + png_error(pp, "validate: invalid tRNS chunk with alpha image"); + } + } + } + + /* Read the number of passes - expected to match the value used when + * creating the image (interlaced or not). This has the side effect of + * turning on interlace handling (if do_interlace is not set.) + */ + dp->npasses = npasses_from_interlace_type(pp, dp->interlace_type); + if (!dp->do_interlace && dp->npasses != png_set_interlace_handling(pp)) + png_error(pp, "validate: file changed interlace type"); + + /* Caller calls png_read_update_info or png_start_read_image now, then calls + * part2. + */ +} + +/* This must be called *after* the png_read_update_info call to get the correct + * 'rowbytes' value, otherwise png_get_rowbytes will refer to the untransformed + * image. + */ +static void +standard_info_part2(standard_display *dp, png_structp pp, png_infop pi, + int nImages) +{ + /* Record cbRow now that it can be found. */ + dp->pixel_size = bit_size(pp, png_get_color_type(pp, pi), + png_get_bit_depth(pp, pi)); + dp->bit_width = png_get_image_width(pp, pi) * dp->pixel_size; + dp->cbRow = png_get_rowbytes(pp, pi); + + /* Validate the rowbytes here again. */ + if (dp->cbRow != (dp->bit_width+7)/8) + png_error(pp, "bad png_get_rowbytes calculation"); + + /* Then ensure there is enough space for the output image(s). */ + store_ensure_image(dp->ps, pp, nImages, dp->cbRow, dp->h); +} + +static void +standard_info_imp(standard_display *dp, png_structp pp, png_infop pi, + int nImages) +{ + /* Note that the validation routine has the side effect of turning on + * interlace handling in the subsequent code. + */ + standard_info_part1(dp, pp, pi); + + /* And the info callback has to call this (or png_read_update_info - see + * below in the png_modifier code for that variant. + */ + if (dp->use_update_info) + { + /* For debugging the effect of multiple calls: */ + int i = dp->use_update_info; + while (i-- > 0) + png_read_update_info(pp, pi); + } + + else + png_start_read_image(pp); + + /* Validate the height, width and rowbytes plus ensure that sufficient buffer + * exists for decoding the image. + */ + standard_info_part2(dp, pp, pi, nImages); +} + +static void +standard_info(png_structp pp, png_infop pi) +{ + standard_display *dp = voidcast(standard_display*, + png_get_progressive_ptr(pp)); + + /* Call with nImages==1 because the progressive reader can only produce one + * image. + */ + standard_info_imp(dp, pp, pi, 1 /*only one image*/); +} + +static void +progressive_row(png_structp pp, png_bytep new_row, png_uint_32 y, int pass) +{ + PNG_CONST standard_display *dp = voidcast(standard_display*, + png_get_progressive_ptr(pp)); + + /* When handling interlacing some rows will be absent in each pass, the + * callback still gets called, but with a NULL pointer. This is checked + * in the 'else' clause below. We need our own 'cbRow', but we can't call + * png_get_rowbytes because we got no info structure. + */ + if (new_row != NULL) + { + png_bytep row; + + /* In the case where the reader doesn't do the interlace it gives + * us the y in the sub-image: + */ + if (dp->do_interlace && dp->interlace_type == PNG_INTERLACE_ADAM7) + { +#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED + /* Use this opportunity to validate the png 'current' APIs: */ + if (y != png_get_current_row_number(pp)) + png_error(pp, "png_get_current_row_number is broken"); + + if (pass != png_get_current_pass_number(pp)) + png_error(pp, "png_get_current_pass_number is broken"); +#endif + + y = PNG_ROW_FROM_PASS_ROW(y, pass); + } + + /* Validate this just in case. */ + if (y >= dp->h) + png_error(pp, "invalid y to progressive row callback"); + + row = store_image_row(dp->ps, pp, 0, y); + +#ifdef PNG_READ_INTERLACING_SUPPORTED + /* Combine the new row into the old: */ + if (dp->do_interlace) + { + if (dp->interlace_type == PNG_INTERLACE_ADAM7) + deinterlace_row(row, new_row, dp->pixel_size, dp->w, pass); + else + row_copy(row, new_row, dp->pixel_size * dp->w); + } + else + png_progressive_combine_row(pp, row, new_row); + } else if (dp->interlace_type == PNG_INTERLACE_ADAM7 && + PNG_ROW_IN_INTERLACE_PASS(y, pass) && + PNG_PASS_COLS(dp->w, pass) > 0) + png_error(pp, "missing row in progressive de-interlacing"); +#endif /* PNG_READ_INTERLACING_SUPPORTED */ +} + +static void +sequential_row(standard_display *dp, png_structp pp, png_infop pi, + PNG_CONST int iImage, PNG_CONST int iDisplay) +{ + PNG_CONST int npasses = dp->npasses; + PNG_CONST int do_interlace = dp->do_interlace && + dp->interlace_type == PNG_INTERLACE_ADAM7; + PNG_CONST png_uint_32 height = standard_height(pp, dp->id); + PNG_CONST png_uint_32 width = standard_width(pp, dp->id); + PNG_CONST png_store* ps = dp->ps; + int pass; + + for (pass=0; pass 0 && PNG_ROW_IN_INTERLACE_PASS(y, pass)) + { + /* Read the row into a pair of temporary buffers, then do the + * merge here into the output rows. + */ + png_byte row[STANDARD_ROWMAX], display[STANDARD_ROWMAX]; + + /* The following aids (to some extent) error detection - we can + * see where png_read_row wrote. Use opposite values in row and + * display to make this easier. Don't use 0xff (which is used in + * the image write code to fill unused bits) or 0 (which is a + * likely value to overwrite unused bits with). + */ + memset(row, 0xc5, sizeof row); + memset(display, 0x5c, sizeof display); + + png_read_row(pp, row, display); + + if (iImage >= 0) + deinterlace_row(store_image_row(ps, pp, iImage, y), row, + dp->pixel_size, dp->w, pass); + + if (iDisplay >= 0) + deinterlace_row(store_image_row(ps, pp, iDisplay, y), display, + dp->pixel_size, dp->w, pass); + } + } + else + png_read_row(pp, + iImage >= 0 ? store_image_row(ps, pp, iImage, y) : NULL, + iDisplay >= 0 ? store_image_row(ps, pp, iDisplay, y) : NULL); + } + } + + /* And finish the read operation (only really necessary if the caller wants + * to find additional data in png_info from chunks after the last IDAT.) + */ + png_read_end(pp, pi); +} + +static void +standard_row_validate(standard_display *dp, png_structp pp, + int iImage, int iDisplay, png_uint_32 y) +{ + int where; + png_byte std[STANDARD_ROWMAX]; + + /* The row must be pre-initialized to the magic number here for the size + * tests to pass: + */ + memset(std, 178, sizeof std); + standard_row(pp, std, dp->id, y); + + /* At the end both the 'row' and 'display' arrays should end up identical. + * In earlier passes 'row' will be partially filled in, with only the pixels + * that have been read so far, but 'display' will have those pixels + * replicated to fill the unread pixels while reading an interlaced image. +#if PNG_LIBPNG_VER < 10506 + * The side effect inside the libpng sequential reader is that the 'row' + * array retains the correct values for unwritten pixels within the row + * bytes, while the 'display' array gets bits off the end of the image (in + * the last byte) trashed. Unfortunately in the progressive reader the + * row bytes are always trashed, so we always do a pixel_cmp here even though + * a memcmp of all cbRow bytes will succeed for the sequential reader. +#endif + */ + if (iImage >= 0 && + (where = pixel_cmp(std, store_image_row(dp->ps, pp, iImage, y), + dp->bit_width)) != 0) + { + char msg[64]; + sprintf(msg, "PNG image row[%d][%d] changed from %.2x to %.2x", y, + where-1, std[where-1], + store_image_row(dp->ps, pp, iImage, y)[where-1]); + png_error(pp, msg); + } + +#if PNG_LIBPNG_VER < 10506 + /* In this case use pixel_cmp because we need to compare a partial + * byte at the end of the row if the row is not an exact multiple + * of 8 bits wide. (This is fixed in libpng-1.5.6 and pixel_cmp is + * changed to match!) + */ +#endif + if (iDisplay >= 0 && + (where = pixel_cmp(std, store_image_row(dp->ps, pp, iDisplay, y), + dp->bit_width)) != 0) + { + char msg[64]; + sprintf(msg, "display row[%d][%d] changed from %.2x to %.2x", y, + where-1, std[where-1], + store_image_row(dp->ps, pp, iDisplay, y)[where-1]); + png_error(pp, msg); + } +} + +static void +standard_image_validate(standard_display *dp, png_structp pp, int iImage, + int iDisplay) +{ + png_uint_32 y; + + if (iImage >= 0) + store_image_check(dp->ps, pp, iImage); + + if (iDisplay >= 0) + store_image_check(dp->ps, pp, iDisplay); + + for (y=0; yh; ++y) + standard_row_validate(dp, pp, iImage, iDisplay, y); + + /* This avoids false positives if the validation code is never called! */ + dp->ps->validated = 1; +} + +static void +standard_end(png_structp pp, png_infop pi) +{ + standard_display *dp = voidcast(standard_display*, + png_get_progressive_ptr(pp)); + + UNUSED(pi) + + /* Validate the image - progressive reading only produces one variant for + * interlaced images. + */ + standard_image_validate(dp, pp, 0, -1); +} + +/* A single test run checking the standard image to ensure it is not damaged. */ +static void +standard_test(png_store* PNG_CONST psIn, png_uint_32 PNG_CONST id, + int do_interlace, int use_update_info) +{ + standard_display d; + context(psIn, fault); + + /* Set up the display (stack frame) variables from the arguments to the + * function and initialize the locals that are filled in later. + */ + standard_display_init(&d, psIn, id, do_interlace, use_update_info); + + /* Everything is protected by a Try/Catch. The functions called also + * typically have local Try/Catch blocks. + */ + Try + { + png_structp pp; + png_infop pi; + + /* Get a png_struct for reading the image. This will throw an error if it + * fails, so we don't need to check the result. + */ + pp = set_store_for_read(d.ps, &pi, d.id, + d.do_interlace ? (d.ps->progressive ? + "pngvalid progressive deinterlacer" : + "pngvalid sequential deinterlacer") : (d.ps->progressive ? + "progressive reader" : "sequential reader")); + + /* Initialize the palette correctly from the png_store_file. */ + standard_palette_init(&d); + + /* Introduce the correct read function. */ + if (d.ps->progressive) + { + png_set_progressive_read_fn(pp, &d, standard_info, progressive_row, + standard_end); + + /* Now feed data into the reader until we reach the end: */ + store_progressive_read(d.ps, pp, pi); + } + else + { + /* Note that this takes the store, not the display. */ + png_set_read_fn(pp, d.ps, store_read); + + /* Check the header values: */ + png_read_info(pp, pi); + + /* The code tests both versions of the images that the sequential + * reader can produce. + */ + standard_info_imp(&d, pp, pi, 2 /*images*/); + + /* Need the total bytes in the image below; we can't get to this point + * unless the PNG file values have been checked against the expected + * values. + */ + { + sequential_row(&d, pp, pi, 0, 1); + + /* After the last pass loop over the rows again to check that the + * image is correct. + */ + if (!d.speed) + standard_image_validate(&d, pp, 0, 1); + else + d.ps->validated = 1; + } + } + + /* Check for validation. */ + if (!d.ps->validated) + png_error(pp, "image read failed silently"); + + /* Successful completion. */ + } + + Catch(fault) + d.ps = fault; /* make sure this hasn't been clobbered. */ + + /* In either case clean up the store. */ + store_read_reset(d.ps); +} + +static int +test_standard(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, + int bdlo, int PNG_CONST bdhi) +{ + for (; bdlo <= bdhi; ++bdlo) + { + int interlace_type; + + for (interlace_type = PNG_INTERLACE_NONE; + interlace_type < PNG_INTERLACE_LAST; ++interlace_type) + { + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + interlace_type, 0, 0, 0), 0/*do_interlace*/, pm->use_update_info); + + if (fail(pm)) + return 0; + } + } + + return 1; /* keep going */ +} + +static void +perform_standard_test(png_modifier *pm) +{ + /* Test each colour type over the valid range of bit depths (expressed as + * log2(bit_depth) in turn, stop as soon as any error is detected. + */ + if (!test_standard(pm, 0, 0, READ_BDHI)) + return; + + if (!test_standard(pm, 2, 3, READ_BDHI)) + return; + + if (!test_standard(pm, 3, 0, 3)) + return; + + if (!test_standard(pm, 4, 3, READ_BDHI)) + return; + + if (!test_standard(pm, 6, 3, READ_BDHI)) + return; +} + + +/********************************** SIZE TESTS ********************************/ +static int +test_size(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, + int bdlo, int PNG_CONST bdhi) +{ + /* Run the tests on each combination. + * + * NOTE: on my 32 bit x86 each of the following blocks takes + * a total of 3.5 seconds if done across every combo of bit depth + * width and height. This is a waste of time in practice, hence the + * hinc and winc stuff: + */ + static PNG_CONST png_byte hinc[] = {1, 3, 11, 1, 5}; + static PNG_CONST png_byte winc[] = {1, 9, 5, 7, 1}; + for (; bdlo <= bdhi; ++bdlo) + { + png_uint_32 h, w; + + for (h=1; h<=16; h+=hinc[bdlo]) for (w=1; w<=16; w+=winc[bdlo]) + { + /* First test all the 'size' images against the sequential + * reader using libpng to deinterlace (where required.) This + * validates the write side of libpng. There are four possibilities + * to validate. + */ + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_NONE, w, h, 0), 0/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; + + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_NONE, w, h, 1), 0/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; + + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_ADAM7, w, h, 0), 0/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; + + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_ADAM7, w, h, 1), 0/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; + + /* Now validate the interlaced read side - do_interlace true, + * in the progressive case this does actually make a difference + * to the code used in the non-interlaced case too. + */ + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_NONE, w, h, 0), 1/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; + + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_ADAM7, w, h, 0), 1/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; + } + } + + return 1; /* keep going */ +} + +static void +perform_size_test(png_modifier *pm) +{ + /* Test each colour type over the valid range of bit depths (expressed as + * log2(bit_depth) in turn, stop as soon as any error is detected. + */ + if (!test_size(pm, 0, 0, READ_BDHI)) + return; + + if (!test_size(pm, 2, 3, READ_BDHI)) + return; + + /* For the moment don't do the palette test - it's a waste of time when + * compared to the grayscale test. + */ +#if 0 + if (!test_size(pm, 3, 0, 3)) + return; +#endif + + if (!test_size(pm, 4, 3, READ_BDHI)) + return; + + if (!test_size(pm, 6, 3, READ_BDHI)) + return; +} + + +/******************************* TRANSFORM TESTS ******************************/ +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +/* A set of tests to validate libpng image transforms. The possibilities here + * are legion because the transforms can be combined in a combinatorial + * fashion. To deal with this some measure of restraint is required, otherwise + * the tests would take forever. + */ +typedef struct image_pixel +{ + /* A local (pngvalid) representation of a PNG pixel, in all its + * various forms. + */ + unsigned int red, green, blue, alpha; /* For non-palette images. */ + unsigned int palette_index; /* For a palette image. */ + png_byte colour_type; /* As in the spec. */ + png_byte bit_depth; /* Defines bit size in row */ + png_byte sample_depth; /* Scale of samples */ + int have_tRNS; /* tRNS chunk may need processing */ + + /* For checking the code calculates double precision floating point values + * along with an error value, accumulated from the transforms. Because an + * sBIT setting allows larger error bounds (indeed, by the spec, apparently + * up to just less than +/-1 in the scaled value) the *lowest* sBIT for each + * channel is stored. This sBIT value is folded in to the stored error value + * at the end of the application of the transforms to the pixel. + */ + double redf, greenf, bluef, alphaf; + double rede, greene, bluee, alphae; + png_byte red_sBIT, green_sBIT, blue_sBIT, alpha_sBIT; +} image_pixel; + +/* Shared utility function, see below. */ +static void +image_pixel_setf(image_pixel *this, unsigned int max) +{ + this->redf = this->red / (double)max; + this->greenf = this->green / (double)max; + this->bluef = this->blue / (double)max; + this->alphaf = this->alpha / (double)max; + + if (this->red < max) + this->rede = this->redf * DBL_EPSILON; + else + this->rede = 0; + if (this->green < max) + this->greene = this->greenf * DBL_EPSILON; + else + this->greene = 0; + if (this->blue < max) + this->bluee = this->bluef * DBL_EPSILON; + else + this->bluee = 0; + if (this->alpha < max) + this->alphae = this->alphaf * DBL_EPSILON; + else + this->alphae = 0; +} + +/* Initialize the structure for the next pixel - call this before doing any + * transforms and call it for each pixel since all the fields may need to be + * reset. + */ +static void +image_pixel_init(image_pixel *this, png_const_bytep row, png_byte colour_type, + png_byte bit_depth, png_uint_32 x, store_palette palette) +{ + PNG_CONST png_byte sample_depth = (png_byte)(colour_type == + PNG_COLOR_TYPE_PALETTE ? 8 : bit_depth); + PNG_CONST unsigned int max = (1U<palette_index = this->red = this->green = this->blue = + sample(row, colour_type, bit_depth, x, 0); + this->alpha = max; + this->red_sBIT = this->green_sBIT = this->blue_sBIT = this->alpha_sBIT = + sample_depth; + + /* Then override as appropriate: */ + if (colour_type == 3) /* palette */ + { + /* This permits the caller to default to the sample value. */ + if (palette != 0) + { + PNG_CONST unsigned int i = this->palette_index; + + this->red = palette[i].red; + this->green = palette[i].green; + this->blue = palette[i].blue; + this->alpha = palette[i].alpha; + } + } + + else /* not palette */ + { + unsigned int i = 0; + + if (colour_type & 2) + { + this->green = sample(row, colour_type, bit_depth, x, 1); + this->blue = sample(row, colour_type, bit_depth, x, 2); + i = 2; + } + if (colour_type & 4) + this->alpha = sample(row, colour_type, bit_depth, x, ++i); + } + + /* Calculate the scaled values, these are simply the values divided by + * 'max' and the error is initialized to the double precision epsilon value + * from the header file. + */ + image_pixel_setf(this, max); + + /* Store the input information for use in the transforms - these will + * modify the information. + */ + this->colour_type = colour_type; + this->bit_depth = bit_depth; + this->sample_depth = sample_depth; + this->have_tRNS = 0; +} + +/* Convert a palette image to an rgb image. This necessarily converts the tRNS + * chunk at the same time, because the tRNS will be in palette form. The way + * palette validation works means that the original palette is never updated, + * instead the image_pixel value from the row contains the RGB of the + * corresponding palette entry and *this* is updated. Consequently this routine + * only needs to change the colour type information. + */ +static void +image_pixel_convert_PLTE(image_pixel *this) +{ + if (this->colour_type == PNG_COLOR_TYPE_PALETTE) + { + if (this->have_tRNS) + { + this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; + this->have_tRNS = 0; + } + else + this->colour_type = PNG_COLOR_TYPE_RGB; + + /* The bit depth of the row changes at this point too (notice that this is + * the row format, not the sample depth, which is separate.) + */ + this->bit_depth = 8; + } +} + +/* Add an alpha channel; this will import the tRNS information because tRNS is + * not valid in an alpha image. The bit depth will invariably be set to at + * least 8. Palette images will be converted to alpha (using the above API). + */ +static void +image_pixel_add_alpha(image_pixel *this, PNG_CONST standard_display *display) +{ + if (this->colour_type == PNG_COLOR_TYPE_PALETTE) + image_pixel_convert_PLTE(this); + + if ((this->colour_type & PNG_COLOR_MASK_ALPHA) == 0) + { + if (this->colour_type == PNG_COLOR_TYPE_GRAY) + { + if (this->bit_depth < 8) + this->bit_depth = 8; + + if (this->have_tRNS) + { + this->have_tRNS = 0; + + /* Check the input, original, channel value here against the + * original tRNS gray chunk valie. + */ + if (this->red == display->transparent.red) + this->alphaf = 0; + else + this->alphaf = 1; + } + else + this->alphaf = 1; + + this->colour_type = PNG_COLOR_TYPE_GRAY_ALPHA; + } + + else if (this->colour_type == PNG_COLOR_TYPE_RGB) + { + if (this->have_tRNS) + { + this->have_tRNS = 0; + + /* Again, check the exact input values, not the current transformed + * value! + */ + if (this->red == display->transparent.red && + this->green == display->transparent.green && + this->blue == display->transparent.blue) + this->alphaf = 0; + else + this->alphaf = 1; + + this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; + } + } + + /* The error in the alpha is zero and the sBIT value comes from the + * original sBIT data (actually it will always be the original bit depth). + */ + this->alphae = 0; + this->alpha_sBIT = display->alpha_sBIT; + } +} + +struct transform_display; +typedef struct image_transform +{ + /* The name of this transform: a string. */ + PNG_CONST char *name; + + /* Each transform can be disabled from the command line: */ + int enable; + + /* The global list of transforms; read only. */ + struct image_transform *PNG_CONST list; + + /* The global count of the number of times this transform has been set on an + * image. + */ + unsigned int global_use; + + /* The local count of the number of times this transform has been set. */ + unsigned int local_use; + + /* The next transform in the list, each transform must call its own next + * transform after it has processed the pixel successfully. + */ + PNG_CONST struct image_transform *next; + + /* A single transform for the image, expressed as a series of function + * callbacks and some space for values. + * + * First a callback to add any required modifications to the png_modifier; + * this gets called just before the modifier is set up for read. + */ + void (*ini)(PNG_CONST struct image_transform *this, + struct transform_display *that); + + /* And a callback to set the transform on the current png_read_struct: + */ + void (*set)(PNG_CONST struct image_transform *this, + struct transform_display *that, png_structp pp, png_infop pi); + + /* Then a transform that takes an input pixel in one PNG format or another + * and modifies it by a pngvalid implementation of the transform (thus + * duplicating the libpng intent without, we hope, duplicating the bugs + * in the libpng implementation!) The png_structp is solely to allow error + * reporting via png_error and png_warning. + */ + void (*mod)(PNG_CONST struct image_transform *this, image_pixel *that, + png_structp pp, PNG_CONST struct transform_display *display); + + /* Add this transform to the list and return true if the transform is + * meaningful for this colour type and bit depth - if false then the + * transform should have no effect on the image so there's not a lot of + * point running it. + */ + int (*add)(struct image_transform *this, + PNG_CONST struct image_transform **that, png_byte colour_type, + png_byte bit_depth); +} image_transform; + +typedef struct transform_display +{ + standard_display this; + + /* Parameters */ + png_modifier* pm; + PNG_CONST image_transform* transform_list; + + /* Local variables */ + png_byte output_colour_type; + png_byte output_bit_depth; + + /* Modifications (not necessarily used.) */ + gama_modification gama_mod; + chrm_modification chrm_mod; + srgb_modification srgb_mod; +} transform_display; + +/* Set sRGB, cHRM and gAMA transforms as required by the current encoding. */ +static void +transform_set_encoding(transform_display *this) +{ + /* Set up the png_modifier '_current' fields then use these to determine how + * to add appropriate chunks. + */ + png_modifier *pm = this->pm; + + modifier_set_encoding(pm); + + if (modifier_color_encoding_is_set(pm)) + { + if (modifier_color_encoding_is_sRGB(pm)) + srgb_modification_init(&this->srgb_mod, pm, PNG_sRGB_INTENT_ABSOLUTE); + + else + { + /* Set gAMA and cHRM separately. */ + gama_modification_init(&this->gama_mod, pm, pm->current_gamma); + + if (pm->current_encoding != 0) + chrm_modification_init(&this->chrm_mod, pm, pm->current_encoding); + } + } +} + +/* Three functions to end the list: */ +static void +image_transform_ini_end(PNG_CONST image_transform *this, + transform_display *that) +{ + UNUSED(this) + UNUSED(that) +} + +static void +image_transform_set_end(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + UNUSED(this) + UNUSED(that) + UNUSED(pp) + UNUSED(pi) +} + +/* At the end of the list recalculate the output image pixel value from the + * double precision values set up by the preceding 'mod' calls: + */ +static unsigned int +sample_scale(double sample_value, unsigned int scale) +{ + sample_value = floor(sample_value * scale + .5); + + /* Return NaN as 0: */ + if (!(sample_value > 0)) + sample_value = 0; + else if (sample_value > scale) + sample_value = scale; + + return (unsigned int)sample_value; +} + +static void +image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that, + png_structp pp, PNG_CONST transform_display *display) +{ + PNG_CONST unsigned int scale = (1U<sample_depth)-1; + + UNUSED(this) + UNUSED(pp) + UNUSED(display) + + /* At the end recalculate the digitized red green and blue values according + * to the current sample_depth of the pixel. + * + * The sample value is simply scaled to the maximum, checking for over + * and underflow (which can both happen for some image transforms, + * including simple size scaling, though libpng doesn't do that at present. + */ + that->red = sample_scale(that->redf, scale); + + /* The error value is increased, at the end, according to the lowest sBIT + * value seen. Common sense tells us that the intermediate integer + * representations are no more accurate than +/- 0.5 in the integral values, + * the sBIT allows the implementation to be worse than this. In addition the + * PNG specification actually permits any error within the range (-1..+1), + * but that is ignored here. Instead the final digitized value is compared, + * below to the digitized value of the error limits - this has the net effect + * of allowing (almost) +/-1 in the output value. It's difficult to see how + * any algorithm that digitizes intermediate results can be more accurate. + */ + that->rede += 1./(2*((1U<red_sBIT)-1)); + + if (that->colour_type & PNG_COLOR_MASK_COLOR) + { + that->green = sample_scale(that->greenf, scale); + that->blue = sample_scale(that->bluef, scale); + that->greene += 1./(2*((1U<green_sBIT)-1)); + that->bluee += 1./(2*((1U<blue_sBIT)-1)); + } + else + { + that->blue = that->green = that->red; + that->bluef = that->greenf = that->redf; + that->bluee = that->greene = that->rede; + } + + if ((that->colour_type & PNG_COLOR_MASK_ALPHA) || + that->colour_type == PNG_COLOR_TYPE_PALETTE) + { + that->alpha = sample_scale(that->alphaf, scale); + that->alphae += 1./(2*((1U<alpha_sBIT)-1)); + } + else + { + that->alpha = scale; /* opaque */ + that->alpha = 1; /* Override this. */ + that->alphae = 0; /* It's exact ;-) */ + } +} + +/* Static 'end' structure: */ +static image_transform image_transform_end = +{ + "(end)", /* name */ + 1, /* enable */ + 0, /* list */ + 0, /* global_use */ + 0, /* local_use */ + 0, /* next */ + image_transform_ini_end, + image_transform_set_end, + image_transform_mod_end, + 0 /* never called, I want it to crash if it is! */ +}; + +/* Reader callbacks and implementations, where they differ from the standard + * ones. + */ +static void +transform_display_init(transform_display *dp, png_modifier *pm, png_uint_32 id, + PNG_CONST image_transform *transform_list) +{ + memset(dp, 0, sizeof dp); + + /* Standard fields */ + standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/, + pm->use_update_info); + + /* Parameter fields */ + dp->pm = pm; + dp->transform_list = transform_list; + + /* Local variable fields */ + dp->output_colour_type = 255; /* invalid */ + dp->output_bit_depth = 255; /* invalid */ +} + +static void +transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) +{ + /* Reuse the standard stuff as appropriate. */ + standard_info_part1(&dp->this, pp, pi); + + /* Now set the list of transforms. */ + dp->transform_list->set(dp->transform_list, dp, pp, pi); + + /* Update the info structure for these transforms: */ + { + int i = dp->this.use_update_info; + /* Always do one call, even if use_update_info is 0. */ + do + png_read_update_info(pp, pi); + while (--i > 0); + } + + /* And get the output information into the standard_display */ + standard_info_part2(&dp->this, pp, pi, 1/*images*/); + + /* Plus the extra stuff we need for the transform tests: */ + dp->output_colour_type = png_get_color_type(pp, pi); + dp->output_bit_depth = png_get_bit_depth(pp, pi); + + /* Validate the combination of colour type and bit depth that we are getting + * out of libpng; the semantics of something not in the PNG spec are, at + * best, unclear. + */ + switch (dp->output_colour_type) + { + case PNG_COLOR_TYPE_PALETTE: + if (dp->output_bit_depth > 8) goto error; + /*FALL THROUGH*/ + case PNG_COLOR_TYPE_GRAY: + if (dp->output_bit_depth == 1 || dp->output_bit_depth == 2 || + dp->output_bit_depth == 4) + break; + /*FALL THROUGH*/ + default: + if (dp->output_bit_depth == 8 || dp->output_bit_depth == 16) + break; + /*FALL THROUGH*/ + error: + { + char message[128]; + size_t pos; + + pos = safecat(message, sizeof message, 0, + "invalid final bit depth: colour type("); + pos = safecatn(message, sizeof message, pos, dp->output_colour_type); + pos = safecat(message, sizeof message, pos, ") with bit depth: "); + pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); + + png_error(pp, message); + } + } + + /* Use a test pixel to check that the output agrees with what we expect - + * this avoids running the whole test if the output is unexpected. + */ + { + image_pixel test_pixel; + + memset(&test_pixel, 0, sizeof test_pixel); + test_pixel.colour_type = dp->this.colour_type; /* input */ + test_pixel.bit_depth = dp->this.bit_depth; + if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE) + test_pixel.sample_depth = 8; + else + test_pixel.sample_depth = test_pixel.bit_depth; + /* Don't need sBIT here */ + test_pixel.have_tRNS = dp->this.is_transparent; + + dp->transform_list->mod(dp->transform_list, &test_pixel, pp, dp); + + if (test_pixel.colour_type != dp->output_colour_type) + { + char message[128]; + size_t pos = safecat(message, sizeof message, 0, "colour type "); + + pos = safecatn(message, sizeof message, pos, dp->output_colour_type); + pos = safecat(message, sizeof message, pos, " expected "); + pos = safecatn(message, sizeof message, pos, test_pixel.colour_type); + + png_error(pp, message); + } + + if (test_pixel.bit_depth != dp->output_bit_depth) + { + char message[128]; + size_t pos = safecat(message, sizeof message, 0, "bit depth "); + + pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); + pos = safecat(message, sizeof message, pos, " expected "); + pos = safecatn(message, sizeof message, pos, test_pixel.bit_depth); + + png_error(pp, message); + } + + /* If both bit depth and colour type are correct check the sample depth. + * I believe these are both internal errors. + */ + if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE) + { + if (test_pixel.sample_depth != 8) /* oops - internal error! */ + png_error(pp, "pngvalid: internal: palette sample depth not 8"); + } + else if (test_pixel.sample_depth != dp->output_bit_depth) + { + char message[128]; + size_t pos = safecat(message, sizeof message, 0, + "internal: sample depth "); + + pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); + pos = safecat(message, sizeof message, pos, " expected "); + pos = safecatn(message, sizeof message, pos, test_pixel.sample_depth); + + png_error(pp, message); + } + } +} + +static void +transform_info(png_structp pp, png_infop pi) +{ + transform_info_imp(voidcast(transform_display*, png_get_progressive_ptr(pp)), + pp, pi); +} + +static void +transform_range_check(png_structp pp, unsigned int r, unsigned int g, + unsigned int b, unsigned int a, unsigned int in_digitized, double in, + unsigned int out, png_byte sample_depth, double err, double limit, + PNG_CONST char *name, double digitization_error) +{ + /* Compare the scaled, digitzed, values of our local calculation (in+-err) + * with the digitized values libpng produced; 'sample_depth' is the actual + * digitization depth of the libpng output colors (the bit depth except for + * palette images where it is always 8.) The check on 'err' is to detect + * internal errors in pngvalid itself. + */ + unsigned int max = (1U< limit || !(out >= in_min && out <= in_max)) + { + char message[256]; + size_t pos; + + pos = safecat(message, sizeof message, 0, name); + pos = safecat(message, sizeof message, pos, " output value error: rgba("); + pos = safecatn(message, sizeof message, pos, r); + pos = safecat(message, sizeof message, pos, ","); + pos = safecatn(message, sizeof message, pos, g); + pos = safecat(message, sizeof message, pos, ","); + pos = safecatn(message, sizeof message, pos, b); + pos = safecat(message, sizeof message, pos, ","); + pos = safecatn(message, sizeof message, pos, a); + pos = safecat(message, sizeof message, pos, "): "); + pos = safecatn(message, sizeof message, pos, out); + pos = safecat(message, sizeof message, pos, " expected: "); + pos = safecatn(message, sizeof message, pos, in_digitized); + pos = safecat(message, sizeof message, pos, " ("); + pos = safecatd(message, sizeof message, pos, (in-err)*max, 3); + pos = safecat(message, sizeof message, pos, ".."); + pos = safecatd(message, sizeof message, pos, (in+err)*max, 3); + pos = safecat(message, sizeof message, pos, ")"); + + png_error(pp, message); + } +} + +static void +transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) +{ + /* Constants for the loop below: */ + PNG_CONST png_store* PNG_CONST ps = dp->this.ps; + PNG_CONST png_byte in_ct = dp->this.colour_type; + PNG_CONST png_byte in_bd = dp->this.bit_depth; + PNG_CONST png_uint_32 w = dp->this.w; + PNG_CONST png_uint_32 h = dp->this.h; + PNG_CONST png_byte out_ct = dp->output_colour_type; + PNG_CONST png_byte out_bd = dp->output_bit_depth; + PNG_CONST png_byte sample_depth = (png_byte)(out_ct == + PNG_COLOR_TYPE_PALETTE ? 8 : out_bd); + PNG_CONST png_byte red_sBIT = dp->this.red_sBIT; + PNG_CONST png_byte green_sBIT = dp->this.green_sBIT; + PNG_CONST png_byte blue_sBIT = dp->this.blue_sBIT; + PNG_CONST png_byte alpha_sBIT = dp->this.alpha_sBIT; + PNG_CONST int have_tRNS = dp->this.is_transparent; + double digitization_error; + + store_palette out_palette; + png_uint_32 y; + + UNUSED(pi) + + /* Check for row overwrite errors */ + store_image_check(dp->this.ps, pp, 0); + + /* Read the palette corresponding to the output if the output colour type + * indicates a palette, othewise set out_palette to garbage. + */ + if (out_ct == PNG_COLOR_TYPE_PALETTE) + { + /* Validate that the palette count itself has not changed - this is not + * expected. + */ + int npalette = (-1); + + (void)read_palette(out_palette, &npalette, pp, pi); + if (npalette != dp->this.npalette) + png_error(pp, "unexpected change in palette size"); + + digitization_error = .5; + } + else + { + png_byte in_sample_depth; + + memset(out_palette, 0x5e, sizeof out_palette); + + /* assume-8-bit-calculations means assume that if the input has 8 bit + * (or less) samples and the output has 16 bit samples the calculations + * will be done with 8 bit precision, not 16. + * + * TODO: fix this in libpng; png_set_expand_16 should cause 16 bit + * calculations to be used throughout. + */ + if (in_ct == PNG_COLOR_TYPE_PALETTE || in_bd < 16) + in_sample_depth = 8; + else + in_sample_depth = in_bd; + + if (sample_depth != 16 || in_sample_depth > 8 || + !dp->pm->calculations_use_input_precision) + digitization_error = .5; + + /* Else errors are at 8 bit precision, scale .5 in 8 bits to the 16 bits: + */ + else + digitization_error = .5 * 257; + } + + for (y=0; ythis.palette); + + in_pixel.red_sBIT = red_sBIT; + in_pixel.green_sBIT = green_sBIT; + in_pixel.blue_sBIT = blue_sBIT; + in_pixel.alpha_sBIT = alpha_sBIT; + in_pixel.have_tRNS = have_tRNS; + + /* For error detection, below. */ + r = in_pixel.red; + g = in_pixel.green; + b = in_pixel.blue; + a = in_pixel.alpha; + + dp->transform_list->mod(dp->transform_list, &in_pixel, pp, dp); + + /* Read the output pixel and compare it to what we got, we don't + * use the error field here, so no need to update sBIT. + */ + image_pixel_init(&out_pixel, pRow, out_ct, out_bd, x, out_palette); + + /* We don't expect changes to the index here even if the bit depth is + * changed. + */ + if (in_ct == PNG_COLOR_TYPE_PALETTE && + out_ct == PNG_COLOR_TYPE_PALETTE) + { + if (in_pixel.palette_index != out_pixel.palette_index) + png_error(pp, "unexpected transformed palette index"); + } + + /* Check the colours for palette images too - in fact the palette could + * be separately verified itself in most cases. + */ + if (in_pixel.red != out_pixel.red) + transform_range_check(pp, r, g, b, a, in_pixel.red, in_pixel.redf, + out_pixel.red, sample_depth, in_pixel.rede, + dp->pm->limit + 1./(2*((1U<pm->limit + 1./(2*((1U<pm->limit + 1./(2*((1U<pm->limit + 1./(2*((1U<this.ps->validated = 1; +} + +static void +transform_end(png_structp pp, png_infop pi) +{ + transform_display *dp = voidcast(transform_display*, + png_get_progressive_ptr(pp)); + + if (!dp->this.speed) + transform_image_validate(dp, pp, pi); + else + dp->this.ps->validated = 1; +} + +/* A single test run. */ +static void +transform_test(png_modifier *pmIn, PNG_CONST png_uint_32 idIn, + PNG_CONST image_transform* transform_listIn, PNG_CONST char * volatile name) +{ + transform_display d; + context(&pmIn->this, fault); + + transform_display_init(&d, pmIn, idIn, transform_listIn); + + Try + { + size_t pos = 0; + png_structp pp; + png_infop pi; + char full_name[256]; + + /* Make sure the encoding fields are correct and enter the required + * modifications. + */ + transform_set_encoding(&d); + + /* Add any modifications required by the transform list. */ + d.transform_list->ini(d.transform_list, &d); + + /* Add the color space information, if any, to the name. */ + pos = safecat(full_name, sizeof full_name, pos, name); + pos = safecat_current_encoding(full_name, sizeof full_name, pos, d.pm); + + /* Get a png_struct for reading the image. */ + pp = set_modifier_for_read(d.pm, &pi, d.this.id, full_name); + standard_palette_init(&d.this); + +# if 0 + /* Logging (debugging only) */ + { + char buffer[256]; + + (void)store_message(&d.pm->this, pp, buffer, sizeof buffer, 0, + "running test"); + + fprintf(stderr, "%s\n", buffer); + } +# endif + + /* Introduce the correct read function. */ + if (d.pm->this.progressive) + { + /* Share the row function with the standard implementation. */ + png_set_progressive_read_fn(pp, &d, transform_info, progressive_row, + transform_end); + + /* Now feed data into the reader until we reach the end: */ + modifier_progressive_read(d.pm, pp, pi); + } + else + { + /* modifier_read expects a png_modifier* */ + png_set_read_fn(pp, d.pm, modifier_read); + + /* Check the header values: */ + png_read_info(pp, pi); + + /* Process the 'info' requirements. Only one image is generated */ + transform_info_imp(&d, pp, pi); + + sequential_row(&d.this, pp, pi, -1, 0); + + if (!d.this.speed) + transform_image_validate(&d, pp, pi); + else + d.this.ps->validated = 1; + } + + modifier_reset(d.pm); + } + + Catch(fault) + { + modifier_reset((png_modifier*)fault); + } +} + +/* The transforms: */ +#define ITSTRUCT(name) image_transform_##name +#define ITDATA(name) image_transform_data_##name +#define image_transform_ini image_transform_default_ini +#define IT(name)\ +static image_transform ITSTRUCT(name) =\ +{\ + #name,\ + 1, /*enable*/\ + &PT, /*list*/\ + 0, /*global_use*/\ + 0, /*local_use*/\ + 0, /*next*/\ + image_transform_ini,\ + image_transform_png_set_##name##_set,\ + image_transform_png_set_##name##_mod,\ + image_transform_png_set_##name##_add\ +} +#define PT ITSTRUCT(end) /* stores the previous transform */ + +/* To save code: */ +static void +image_transform_default_ini(PNG_CONST image_transform *this, + transform_display *that) +{ + this->next->ini(this->next, that); +} + +static int +image_transform_default_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(colour_type) + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + return 1; +} + +#ifdef PNG_READ_EXPAND_SUPPORTED +/* png_set_palette_to_rgb */ +static void +image_transform_png_set_palette_to_rgb_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_palette_to_rgb(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_palette_to_rgb_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + if (that->colour_type == PNG_COLOR_TYPE_PALETTE) + image_pixel_convert_PLTE(that); + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_palette_to_rgb_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + return colour_type == PNG_COLOR_TYPE_PALETTE; +} + +IT(palette_to_rgb); +#undef PT +#define PT ITSTRUCT(palette_to_rgb) +#endif /* PNG_READ_EXPAND_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_SUPPORTED +/* png_set_tRNS_to_alpha */ +static void +image_transform_png_set_tRNS_to_alpha_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_tRNS_to_alpha(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_tRNS_to_alpha_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + /* LIBPNG BUG: this always forces palette images to RGB. */ + if (that->colour_type == PNG_COLOR_TYPE_PALETTE) + image_pixel_convert_PLTE(that); + + /* This effectively does an 'expand' only if there is some transparency to + * convert to an alpha channel. + */ + if (that->have_tRNS) + image_pixel_add_alpha(that, &display->this); + + /* LIBPNG BUG: otherwise libpng still expands to 8 bits! */ + else + { + if (that->bit_depth < 8) + that->bit_depth =8; + if (that->sample_depth < 8) + that->sample_depth = 8; + } + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_tRNS_to_alpha_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + /* We don't know yet whether there will be a tRNS chunk, but we know that + * this transformation should do nothing if there already is an alpha + * channel. + */ + return (colour_type & PNG_COLOR_MASK_ALPHA) == 0; +} + +IT(tRNS_to_alpha); +#undef PT +#define PT ITSTRUCT(tRNS_to_alpha) +#endif /* PNG_READ_EXPAND_SUPPORTED */ + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +/* png_set_gray_to_rgb */ +static void +image_transform_png_set_gray_to_rgb_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_gray_to_rgb(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_gray_to_rgb_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + /* NOTE: we can actually pend the tRNS processing at this point because we + * can correctly recognize the original pixel value even though we have + * mapped the one gray channel to the three RGB ones, but in fact libpng + * doesn't do this, so we don't either. + */ + if ((that->colour_type & PNG_COLOR_MASK_COLOR) == 0 && that->have_tRNS) + image_pixel_add_alpha(that, &display->this); + + /* Simply expand the bit depth and alter the colour type as required. */ + if (that->colour_type == PNG_COLOR_TYPE_GRAY) + { + /* RGB images have a bit depth at least equal to '8' */ + if (that->bit_depth < 8) + that->sample_depth = that->bit_depth = 8; + + /* And just changing the colour type works here because the green and blue + * channels are being maintained in lock-step with the red/gray: + */ + that->colour_type = PNG_COLOR_TYPE_RGB; + } + + else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) + that->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_gray_to_rgb_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + return (colour_type & PNG_COLOR_MASK_COLOR) == 0; +} + +IT(gray_to_rgb); +#undef PT +#define PT ITSTRUCT(gray_to_rgb) +#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_SUPPORTED +/* png_set_expand */ +static void +image_transform_png_set_expand_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_expand(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_expand_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + /* The general expand case depends on what the colour type is: */ + if (that->colour_type == PNG_COLOR_TYPE_PALETTE) + image_pixel_convert_PLTE(that); + else if (that->bit_depth < 8) /* grayscale */ + that->sample_depth = that->bit_depth = 8; + + if (that->have_tRNS) + image_pixel_add_alpha(that, &display->this); + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_expand_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + /* 'expand' should do nothing for RGBA or GA input - no tRNS and the bit + * depth is at least 8 already. + */ + return (colour_type & PNG_COLOR_MASK_ALPHA) == 0; +} + +IT(expand); +#undef PT +#define PT ITSTRUCT(expand) +#endif /* PNG_READ_EXPAND_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_SUPPORTED +/* png_set_expand_gray_1_2_4_to_8 + * LIBPNG BUG: this just does an 'expand' + */ +static void +image_transform_png_set_expand_gray_1_2_4_to_8_set( + PNG_CONST image_transform *this, transform_display *that, png_structp pp, + png_infop pi) +{ + png_set_expand_gray_1_2_4_to_8(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_expand_gray_1_2_4_to_8_mod( + PNG_CONST image_transform *this, image_pixel *that, png_structp pp, + PNG_CONST transform_display *display) +{ + image_transform_png_set_expand_mod(this, that, pp, display); +} + +static int +image_transform_png_set_expand_gray_1_2_4_to_8_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + return image_transform_png_set_expand_add(this, that, colour_type, + bit_depth); +} + +IT(expand_gray_1_2_4_to_8); +#undef PT +#define PT ITSTRUCT(expand_gray_1_2_4_to_8) +#endif /* PNG_READ_EXPAND_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_16_SUPPORTED +/* png_set_expand_16 */ +static void +image_transform_png_set_expand_16_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_expand_16(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_expand_16_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + /* Expect expand_16 to expand everything to 16 bits as a result of also + * causing 'expand' to happen. + */ + if (that->colour_type == PNG_COLOR_TYPE_PALETTE) + image_pixel_convert_PLTE(that); + + if (that->have_tRNS) + image_pixel_add_alpha(that, &display->this); + + if (that->bit_depth < 16) + that->sample_depth = that->bit_depth = 16; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_expand_16_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(colour_type) + + this->next = *that; + *that = this; + + /* expand_16 does something unless the bit depth is already 16. */ + return bit_depth < 16; +} + +IT(expand_16); +#undef PT +#define PT ITSTRUCT(expand_16) +#endif /* PNG_READ_EXPAND_16_SUPPORTED */ + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* API added in 1.5.4 */ +/* png_set_scale_16 */ +static void +image_transform_png_set_scale_16_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_scale_16(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_scale_16_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + if (that->bit_depth == 16) + { + that->sample_depth = that->bit_depth = 8; + if (that->red_sBIT > 8) that->red_sBIT = 8; + if (that->green_sBIT > 8) that->green_sBIT = 8; + if (that->blue_sBIT > 8) that->blue_sBIT = 8; + if (that->alpha_sBIT > 8) that->alpha_sBIT = 8; + } + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_scale_16_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(colour_type) + + this->next = *that; + *that = this; + + return bit_depth > 8; +} + +IT(scale_16); +#undef PT +#define PT ITSTRUCT(scale_16) +#endif /* PNG_READ_SCALE_16_TO_8_SUPPORTED (1.5.4 on) */ + +#ifdef PNG_READ_16_TO_8_SUPPORTED /* the default before 1.5.4 */ +/* png_set_strip_16 */ +static void +image_transform_png_set_strip_16_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_strip_16(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_strip_16_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + if (that->bit_depth == 16) + { + that->sample_depth = that->bit_depth = 8; + if (that->red_sBIT > 8) that->red_sBIT = 8; + if (that->green_sBIT > 8) that->green_sBIT = 8; + if (that->blue_sBIT > 8) that->blue_sBIT = 8; + if (that->alpha_sBIT > 8) that->alpha_sBIT = 8; + + /* Prior to 1.5.4 png_set_strip_16 would use an 'accurate' method if this + * configuration option is set. From 1.5.4 the flag is never set and the + * 'scale' API (above) must be used. + */ +# ifdef PNG_READ_ACCURATE_SCALE_SUPPORTED +# if PNG_LIBPNG_VER >= 10504 +# error PNG_READ_ACCURATE_SCALE should not be set +# endif + + /* The strip 16 algorithm drops the low 8 bits rather than calculating + * 1/257, so we need to adjust the permitted errors appropriately: + * Notice that this is only relevant prior to the addition of the + * png_set_scale_16 API in 1.5.4 (but 1.5.4+ always defines the above!) + */ + { + PNG_CONST double d = (255-128.5)/65535; + that->rede += d; + that->greene += d; + that->bluee += d; + that->alphae += d; + } +# endif + } + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_strip_16_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(colour_type) + + this->next = *that; + *that = this; + + return bit_depth > 8; +} + +IT(strip_16); +#undef PT +#define PT ITSTRUCT(strip_16) +#endif /* PNG_READ_16_TO_8_SUPPORTED */ + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED +/* png_set_strip_alpha */ +static void +image_transform_png_set_strip_alpha_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_strip_alpha(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_strip_alpha_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) + that->colour_type = PNG_COLOR_TYPE_GRAY; + else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) + that->colour_type = PNG_COLOR_TYPE_RGB; + + that->have_tRNS = 0; + that->alphaf = 1; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_strip_alpha_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + return (colour_type & PNG_COLOR_MASK_ALPHA) != 0; +} + +IT(strip_alpha); +#undef PT +#define PT ITSTRUCT(strip_alpha) +#endif /* PNG_READ_STRIP_ALPHA_SUPPORTED */ + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +/* png_set_rgb_to_gray(png_structp, int err_action, double red, double green) + * png_set_rgb_to_gray_fixed(png_structp, int err_action, png_fixed_point red, + * png_fixed_point green) + * png_get_rgb_to_gray_status + * + * The 'default' test here uses values known to be used inside libpng: + * + * red: 6968 + * green: 23434 + * blue: 2366 + * + * These values are being retained for compatibility, along with the somewhat + * broken truncation calculation in the fast-and-inaccurate code path. Older + * versions of libpng will fail the accuracy tests below because they use the + * truncation algorithm everywhere. + */ +#define data ITDATA(rgb_to_gray) +static struct +{ + double gamma; /* File gamma to use in processing */ + + /* The following are the parameters for png_set_rgb_to_gray: */ +# ifdef PNG_FLOATING_POINT_SUPPORTED + double red_to_set; + double green_to_set; +# else + png_fixed_point red_to_set; + png_fixed_point green_to_set; +# endif + + /* The actual coefficients: */ + double red_coefficient; + double green_coefficient; + double blue_coefficient; + + /* Set if the coeefficients have been overridden. */ + int coefficients_overridden; +} data; + +#undef image_transform_ini +#define image_transform_ini image_transform_png_set_rgb_to_gray_ini +static void +image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, + transform_display *that) +{ + png_modifier *pm = that->pm; + PNG_CONST color_encoding *e = pm->current_encoding; + + UNUSED(this) + + /* Since we check the encoding this flag must be set: */ + pm->test_uses_encoding = 1; + + /* If 'e' is not NULL chromaticity information is present and either a cHRM + * or an sRGB chunk will be inserted. + */ + if (e != 0) + { + /* Coefficients come from the encoding, but may need to be normalized to a + * white point Y of 1.0 + */ + PNG_CONST double whiteY = e->red.Y + e->green.Y + e->blue.Y; + + data.red_coefficient = e->red.Y; + data.green_coefficient = e->green.Y; + data.blue_coefficient = e->blue.Y; + + if (whiteY != 1) + { + data.red_coefficient /= whiteY; + data.green_coefficient /= whiteY; + data.blue_coefficient /= whiteY; + } + } + + else + { + /* The default (built in) coeffcients, as above: */ + data.red_coefficient = 6968 / 32768.; + data.green_coefficient = 23434 / 32768.; + data.blue_coefficient = 2366 / 32768.; + } + + data.gamma = pm->current_gamma; + + /* If not set then the calculations assume linear encoding (implicitly): */ + if (data.gamma == 0) + data.gamma = 1; + + /* The arguments to png_set_rgb_to_gray can override the coefficients implied + * by the color space encoding. If doing exhaustive checks do the override + * in each case, otherwise do it randomly. + */ + if (pm->test_exhaustive) + { + /* First time in coefficients_overridden is 0, the following sets it to 1, + * so repeat if it is set. If a test fails this may mean we subsequently + * skip a non-override test, ignore that. + */ + data.coefficients_overridden = !data.coefficients_overridden; + pm->repeat = data.coefficients_overridden != 0; + } + + else + data.coefficients_overridden = random_choice(); + + if (data.coefficients_overridden) + { + /* These values override the color encoding defaults, simply use random + * numbers. + */ + png_uint_32 ru; + double total; + + RANDOMIZE(ru); + data.green_coefficient = total = (ru & 0xffff) / 65535.; + ru >>= 16; + data.red_coefficient = (1 - total) * (ru & 0xffff) / 65535.; + total += data.red_coefficient; + data.blue_coefficient = 1 - total; + +# ifdef PNG_FLOATING_POINT_SUPPORTED + data.red_to_set = data.red_coefficient; + data.green_to_set = data.green_coefficient; +# else + data.red_to_set = fix(data.red_coefficient); + data.green_to_set = fix(data.green_coefficient); +# endif + + /* The following just changes the error messages: */ + pm->encoding_ignored = 1; + } + + else + { + data.red_to_set = -1; + data.green_to_set = -1; + } + + /* Adjust the error limit in the png_modifier because of the larger errors + * produced in the digitization during the gamma handling. + */ + if (data.gamma != 1) /* Use gamma tables */ + { + if (that->this.bit_depth == 16 || pm->assume_16_bit_calculations) + { + /* The 16 bit case ends up producing a maximum error of about + * +/-5 in 65535, allow for +/-8 with the given gamma. + */ + that->pm->limit += pow(8./65535, data.gamma); + } + + else + { + /* Rounding to 8 bits in the linear space causes massive errors which + * will trigger the error check in transform_range_check. Fix that + * here by taking the gamma encoding into account. + */ + that->pm->limit += pow(1./255, data.gamma); + } + } + + else + { + /* With no gamma correction a large error comes from the truncation of the + * calculation in the 8 bit case, allow for that here. + */ + if (that->this.bit_depth != 16) + that->pm->limit += 4E-3; + } +} + +static void +image_transform_png_set_rgb_to_gray_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + PNG_CONST int error_action = 1; /* no error, no defines in png.h */ + +# ifdef PNG_FLOATING_POINT_SUPPORTED + png_set_rgb_to_gray(pp, error_action, data.red_to_set, data.green_to_set); +# else + png_set_rgb_to_gray_fixed(pp, error_action, data.red_to_set, + data.green_to_set); +# endif + +# ifdef PNG_READ_cHRM_SUPPORTED + if (that->pm->current_encoding != 0) + { + /* We have an encoding so a cHRM chunk may have been set; if so then + * check that the libpng APIs give the correct (X,Y,Z) values within + * some margin of error for the round trip through the chromaticity + * form. + */ +# ifdef PNG_FLOATING_POINT_SUPPORTED +# define API_function png_get_cHRM_XYZ +# define API_form "FP" +# define API_type double +# define API_cvt(x) (x) +# else +# define API_function png_get_cHRM_XYZ_fixed +# define API_form "fixed" +# define API_type png_fixed_point +# define API_cvt(x) ((double)(x)/PNG_FP_1) +# endif + + API_type rX, gX, bX; + API_type rY, gY, bY; + API_type rZ, gZ, bZ; + + if ((API_function(pp, pi, &rX, &rY, &rZ, &gX, &gY, &gZ, &bX, &bY, &bZ) + & PNG_INFO_cHRM) != 0) + { + double maxe; + PNG_CONST char *el; + color_encoding e, o; + + /* Expect libpng to return a normalized result, but the original + * color space encoding may not be normalized. + */ + modifier_current_encoding(that->pm, &o); + normalize_color_encoding(&o); + + /* Sanity check the pngvalid code - the coefficients should match + * the normalized Y values of the encoding unless they were + * overridden. + */ + if (data.red_to_set == -1 && data.green_to_set == -1 && + (fabs(o.red.Y - data.red_coefficient) > DBL_EPSILON || + fabs(o.green.Y - data.green_coefficient) > DBL_EPSILON || + fabs(o.blue.Y - data.blue_coefficient) > DBL_EPSILON)) + png_error(pp, "internal pngvalid cHRM coefficient error"); + + /* Generate a colour space encoding. */ + e.gamma = o.gamma; /* not used */ + e.red.X = API_cvt(rX); + e.red.Y = API_cvt(rY); + e.red.Z = API_cvt(rZ); + e.green.X = API_cvt(gX); + e.green.Y = API_cvt(gY); + e.green.Z = API_cvt(gZ); + e.blue.X = API_cvt(bX); + e.blue.Y = API_cvt(bY); + e.blue.Z = API_cvt(bZ); + + /* This should match the original one from the png_modifier, within + * the range permitted by the libpng fixed point representation. + */ + maxe = 0; + el = "-"; /* Set to element name with error */ + +# define CHECK(col,x)\ + {\ + double err = fabs(o.col.x - e.col.x);\ + if (err > maxe)\ + {\ + maxe = err;\ + el = #col "(" #x ")";\ + }\ + } + + CHECK(red,X) + CHECK(red,Y) + CHECK(red,Z) + CHECK(green,X) + CHECK(green,Y) + CHECK(green,Z) + CHECK(blue,X) + CHECK(blue,Y) + CHECK(blue,Z) + + /* Here in both fixed and floating cases to check the values read + * from the cHRm chunk. PNG uses fixed point in the cHRM chunk, so + * we can't expect better than +/-.5E-5 on the result, allow 1E-5. + */ + if (maxe >= 1E-5) + { + size_t pos = 0; + char buffer[256]; + + pos = safecat(buffer, sizeof buffer, pos, API_form); + pos = safecat(buffer, sizeof buffer, pos, " cHRM "); + pos = safecat(buffer, sizeof buffer, pos, el); + pos = safecat(buffer, sizeof buffer, pos, " error: "); + pos = safecatd(buffer, sizeof buffer, pos, maxe, 7); + pos = safecat(buffer, sizeof buffer, pos, " "); + /* Print the color space without the gamma value: */ + pos = safecat_color_encoding(buffer, sizeof buffer, pos, &o, 0); + pos = safecat(buffer, sizeof buffer, pos, " -> "); + pos = safecat_color_encoding(buffer, sizeof buffer, pos, &e, 0); + + png_error(pp, buffer); + } + } + } +# endif /* READ_cHRM */ + + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + if ((that->colour_type & PNG_COLOR_MASK_COLOR) != 0) + { + double gray, err; + + if (that->colour_type == PNG_COLOR_TYPE_PALETTE) + image_pixel_convert_PLTE(that); + + /* Image now has RGB channels... */ + { + PNG_CONST png_modifier *pm = display->pm; + PNG_CONST unsigned int sample_depth = that->sample_depth; + int isgray; + double r, g, b; + double rlo, rhi, glo, ghi, blo, bhi, graylo, grayhi; + + /* Do this using interval arithmetic, otherwise it is too difficult to + * handle the errors correctly. + * + * To handle the gamma correction work out the upper and lower bounds + * of the digitized value. Assume rounding here - normally the values + * will be identical after this operation if there is only one + * transform, feel free to delete the png_error checks on this below in + * the future (this is just me trying to ensure it works!) + */ + r = rlo = rhi = that->redf; + rlo -= that->rede; + rlo = digitize(pm, rlo, sample_depth, 1/*round*/); + rhi += that->rede; + rhi = digitize(pm, rhi, sample_depth, 1/*round*/); + + g = glo = ghi = that->greenf; + glo -= that->greene; + glo = digitize(pm, glo, sample_depth, 1/*round*/); + ghi += that->greene; + ghi = digitize(pm, ghi, sample_depth, 1/*round*/); + + b = blo = bhi = that->bluef; + blo -= that->bluee; + blo = digitize(pm, blo, sample_depth, 1/*round*/); + bhi += that->greene; + bhi = digitize(pm, bhi, sample_depth, 1/*round*/); + + isgray = r==g && g==b; + + if (data.gamma != 1) + { + PNG_CONST double power = 1/data.gamma; + PNG_CONST double abse = abserr(pm, sample_depth, sample_depth); + + /* 'abse' is the absolute error permitted in linear calculations. It + * is used here to capture the error permitted in the handling + * (undoing) of the gamma encoding. Once again digitization occurs + * to handle the upper and lower bounds of the values. This is + * where the real errors are introduced. + */ + r = pow(r, power); + rlo = digitize(pm, pow(rlo, power)-abse, sample_depth, 1); + rhi = digitize(pm, pow(rhi, power)+abse, sample_depth, 1); + + g = pow(g, power); + glo = digitize(pm, pow(glo, power)-abse, sample_depth, 1); + ghi = digitize(pm, pow(ghi, power)+abse, sample_depth, 1); + + b = pow(b, power); + blo = digitize(pm, pow(blo, power)-abse, sample_depth, 1); + bhi = digitize(pm, pow(bhi, power)+abse, sample_depth, 1); + } + + /* Now calculate the actual gray values. Although the error in the + * coefficients depends on whether they were specified on the command + * line (in which case truncation to 15 bits happened) or not (rounding + * was used) the maxium error in an individual coefficient is always + * 1/32768, because even in the rounding case the requirement that + * coefficients add up to 32768 can cause a larger rounding error. + * + * The only time when rounding doesn't occur in 1.5.5 and later is when + * the non-gamma code path is used for less than 16 bit data. + */ + gray = r * data.red_coefficient + g * data.green_coefficient + + b * data.blue_coefficient; + + { + PNG_CONST int do_round = data.gamma != 1 || sample_depth == 16; + PNG_CONST double ce = 1. / 32768; + + graylo = digitize(pm, rlo * (data.red_coefficient-ce) + + glo * (data.green_coefficient-ce) + + blo * (data.blue_coefficient-ce), sample_depth, do_round); + if (graylo <= 0) + graylo = 0; + + grayhi = digitize(pm, rhi * (data.red_coefficient+ce) + + ghi * (data.green_coefficient+ce) + + bhi * (data.blue_coefficient+ce), sample_depth, do_round); + if (grayhi >= 1) + grayhi = 1; + } + + /* And invert the gamma. */ + if (data.gamma != 1) + { + PNG_CONST double power = data.gamma; + + gray = pow(gray, power); + graylo = digitize(pm, pow(graylo, power), sample_depth, 1); + grayhi = digitize(pm, pow(grayhi, power), sample_depth, 1); + } + + /* Now the error can be calculated. + * + * If r==g==b because there is no overall gamma correction libpng + * currently preserves the original value. + */ + if (isgray) + err = (that->rede + that->greene + that->bluee)/3; + + else + { + err = fabs(grayhi-gray); + if (fabs(gray - graylo) > err) + err = fabs(graylo-gray); + + /* Check that this worked: */ + if (err > display->pm->limit) + { + size_t pos = 0; + char buffer[128]; + + pos = safecat(buffer, sizeof buffer, pos, "rgb_to_gray error "); + pos = safecatd(buffer, sizeof buffer, pos, err, 6); + pos = safecat(buffer, sizeof buffer, pos, " exceeds limit "); + pos = safecatd(buffer, sizeof buffer, pos, + display->pm->limit, 6); + png_error(pp, buffer); + } + } + } + + that->bluef = that->greenf = that->redf = gray; + that->bluee = that->greene = that->rede = err; + + /* The sBIT is the minium of the three colour channel sBITs. */ + if (that->red_sBIT > that->green_sBIT) + that->red_sBIT = that->green_sBIT; + if (that->red_sBIT > that->blue_sBIT) + that->red_sBIT = that->blue_sBIT; + that->blue_sBIT = that->green_sBIT = that->red_sBIT; + + /* And remove the colour bit in the type: */ + if (that->colour_type == PNG_COLOR_TYPE_RGB) + that->colour_type = PNG_COLOR_TYPE_GRAY; + else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) + that->colour_type = PNG_COLOR_TYPE_GRAY_ALPHA; + } + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_rgb_to_gray_add(image_transform *this, + PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + return (colour_type & PNG_COLOR_MASK_COLOR) != 0; +} + +#undef data +IT(rgb_to_gray); +#undef PT +#define PT ITSTRUCT(rgb_to_gray) +#undef image_transform_ini +#define image_transform_ini image_transform_default_ini +#endif /* PNG_READ_RGB_TO_GRAY_SUPPORTED */ + +#ifdef PNG_READ_BACKGROUND_SUPPORTED +/* png_set_background(png_structp, png_const_color_16p background_color, + * int background_gamma_code, int need_expand, double background_gamma) + * png_set_background_fixed(png_structp, png_const_color_16p background_color, + * int background_gamma_code, int need_expand, + * png_fixed_point background_gamma) + * + * As with rgb_to_gray this ignores the gamma (at present.) +*/ +#define data ITDATA(background) +static image_pixel data; + +static void +image_transform_png_set_background_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_byte colour_type, bit_depth; + png_byte random_bytes[8]; /* 8 bytes - 64 bits - the biggest pixel */ + png_color_16 back; + + /* We need a background colour, because we don't know exactly what transforms + * have been set we have to supply the colour in the original file format and + * so we need to know what that is! The background colour is stored in the + * transform_display. + */ + RANDOMIZE(random_bytes); + + /* Read the random value, for colour type 3 the background colour is actually + * expressed as a 24bit rgb, not an index. + */ + colour_type = that->this.colour_type; + if (colour_type == 3) + { + colour_type = PNG_COLOR_TYPE_RGB; + bit_depth = 8; + } + + else + bit_depth = that->this.bit_depth; + + image_pixel_init(&data, random_bytes, colour_type, + bit_depth, 0/*x*/, 0/*unused: palette*/); + + /* Extract the background colour from this image_pixel, but make sure the + * unused fields of 'back' are garbage. + */ + RANDOMIZE(back); + + if (colour_type & PNG_COLOR_MASK_COLOR) + { + back.red = (png_uint_16)data.red; + back.green = (png_uint_16)data.green; + back.blue = (png_uint_16)data.blue; + } + + else + back.gray = (png_uint_16)data.red; + +# ifdef PNG_FLOATING_POINT_SUPPORTED + png_set_background(pp, &back, PNG_BACKGROUND_GAMMA_FILE, 1/*need expand*/, + 0); +# else + png_set_background_fixed(pp, &back, PNG_BACKGROUND_GAMMA_FILE, + 1/*need expand*/, 0); +# endif + + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_background_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + /* Check for tRNS first: */ + if (that->have_tRNS && that->colour_type != PNG_COLOR_TYPE_PALETTE) + image_pixel_add_alpha(that, &display->this); + + /* This is only necessary if the alpha value is less than 1. */ + if (that->alphaf < 1) + { + /* Now we do the background calculation without any gamma correction. */ + if (that->alphaf <= 0) + { + that->redf = data.redf; + that->greenf = data.greenf; + that->bluef = data.bluef; + + that->rede = data.rede; + that->greene = data.greene; + that->bluee = data.bluee; + + that->red_sBIT= data.red_sBIT; + that->green_sBIT= data.green_sBIT; + that->blue_sBIT= data.blue_sBIT; + } + + else /* 0 < alpha < 1 */ + { + double alf = 1 - that->alphaf; + + that->redf = that->redf * that->alphaf + data.redf * alf; + that->rede = that->rede * that->alphaf + data.rede * alf + + DBL_EPSILON; + that->greenf = that->greenf * that->alphaf + data.greenf * alf; + that->greene = that->greene * that->alphaf + data.greene * alf + + DBL_EPSILON; + that->bluef = that->bluef * that->alphaf + data.bluef * alf; + that->bluee = that->bluee * that->alphaf + data.bluee * alf + + DBL_EPSILON; + } + + /* Remove the alpha type and set the alpha (not in that order.) */ + that->alphaf = 1; + that->alphae = 0; + + if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) + that->colour_type = PNG_COLOR_TYPE_RGB; + else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) + that->colour_type = PNG_COLOR_TYPE_GRAY; + /* PNG_COLOR_TYPE_PALETTE is not changed */ + } + + this->next->mod(this->next, that, pp, display); +} + +#define image_transform_png_set_background_add image_transform_default_add + +#undef data +IT(background); +#undef PT +#define PT ITSTRUCT(background) +#endif /* PNG_READ_BACKGROUND_SUPPORTED */ + +/* This may just be 'end' if all the transforms are disabled! */ +static image_transform *PNG_CONST image_transform_first = &PT; + +static void +transform_enable(PNG_CONST char *name) +{ + /* Everything starts out enabled, so if we see an 'enable' disabled + * everything else the first time round. + */ + static int all_disabled = 0; + int found_it = 0; + image_transform *list = image_transform_first; + + while (list != &image_transform_end) + { + if (strcmp(list->name, name) == 0) + { + list->enable = 1; + found_it = 1; + } + else if (!all_disabled) + list->enable = 0; + + list = list->list; + } + + all_disabled = 1; + + if (!found_it) + { + fprintf(stderr, "pngvalid: --transform-enable=%s: unknown transform\n", + name); + exit(1); + } +} + +static void +transform_disable(PNG_CONST char *name) +{ + image_transform *list = image_transform_first; + + while (list != &image_transform_end) + { + if (strcmp(list->name, name) == 0) + { + list->enable = 0; + return; + } + + list = list->list; + } + + fprintf(stderr, "pngvalid: --transform-disable=%s: unknown transform\n", + name); + exit(1); +} + +static void +image_transform_reset_count(void) +{ + image_transform *next = image_transform_first; + int count = 0; + + while (next != &image_transform_end) + { + next->local_use = 0; + next->next = 0; + next = next->list; + ++count; + } + + /* This can only happen if we every have more than 32 transforms (excluding + * the end) in the list. + */ + if (count > 32) abort(); +} + +static int +image_transform_test_counter(png_uint_32 counter, unsigned int max) +{ + /* Test the list to see if there is any point contining, given a current + * counter and a 'max' value. + */ + image_transform *next = image_transform_first; + + while (next != &image_transform_end) + { + /* For max 0 or 1 continue until the counter overflows: */ + counter >>= 1; + + /* Continue if any entry hasn't reacked the max. */ + if (max > 1 && next->local_use < max) + return 1; + next = next->list; + } + + return max <= 1 && counter == 0; +} + +static png_uint_32 +image_transform_add(PNG_CONST image_transform **this, unsigned int max, + png_uint_32 counter, char *name, size_t sizeof_name, size_t *pos, + png_byte colour_type, png_byte bit_depth) +{ + for (;;) /* until we manage to add something */ + { + png_uint_32 mask; + image_transform *list; + + /* Find the next counter value, if the counter is zero this is the start + * of the list. This routine always returns the current counter (not the + * next) so it returns 0 at the end and expects 0 at the beginning. + */ + if (counter == 0) /* first time */ + { + image_transform_reset_count(); + if (max <= 1) + counter = 1; + else + counter = random_32(); + } + else /* advance the counter */ + { + switch (max) + { + case 0: ++counter; break; + case 1: counter <<= 1; break; + default: counter = random_32(); break; + } + } + + /* Now add all these items, if possible */ + *this = &image_transform_end; + list = image_transform_first; + mask = 1; + + /* Go through the whole list adding anything that the counter selects: */ + while (list != &image_transform_end) + { + if ((counter & mask) != 0 && list->enable && + (max == 0 || list->local_use < max)) + { + /* Candidate to add: */ + if (list->add(list, this, colour_type, bit_depth) || max == 0) + { + /* Added, so add to the name too. */ + *pos = safecat(name, sizeof_name, *pos, " +"); + *pos = safecat(name, sizeof_name, *pos, list->name); + } + + else + { + /* Not useful and max>0, so remove it from *this: */ + *this = list->next; + list->next = 0; + + /* And, since we know it isn't useful, stop it being added again + * in this run: + */ + list->local_use = max; + } + } + + mask <<= 1; + list = list->list; + } + + /* Now if anything was added we have something to do. */ + if (*this != &image_transform_end) + return counter; + + /* Nothing added, but was there anything in there to add? */ + if (!image_transform_test_counter(counter, max)) + return 0; + } +} + +#ifdef THIS_IS_THE_PROFORMA +static void +image_transform_png_set_@_set(PNG_CONST image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_@(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_@_mod(PNG_CONST image_transform *this, + image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +{ + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_@_add(image_transform *this, + PNG_CONST image_transform **that, char *name, size_t sizeof_name, + size_t *pos, png_byte colour_type, png_byte bit_depth) +{ + this->next = *that; + *that = this; + + *pos = safecat(name, sizeof_name, *pos, " +@"); + + return 1; +} + +IT(@); +#endif + +/* png_set_quantize(png_structp, png_colorp palette, int num_palette, + * int maximum_colors, png_const_uint_16p histogram, int full_quantize) + * + * Very difficult to validate this! + */ +/*NOTE: TBD NYI */ + +/* The data layout transforms are handled by swapping our own channel data, + * necessarily these need to happen at the end of the transform list because the + * semantic of the channels changes after these are executed. Some of these, + * like set_shift and set_packing, can't be done at present because they change + * the layout of the data at the sub-sample level so sample() won't get the + * right answer. + */ +/* png_set_invert_alpha */ +/*NOTE: TBD NYI */ + +/* png_set_bgr */ +/*NOTE: TBD NYI */ + +/* png_set_swap_alpha */ +/*NOTE: TBD NYI */ + +/* png_set_swap */ +/*NOTE: TBD NYI */ + +/* png_set_filler, (png_structp png_ptr, png_uint_32 filler, int flags)); */ +/*NOTE: TBD NYI */ + +/* png_set_add_alpha, (png_structp png_ptr, png_uint_32 filler, int flags)); */ +/*NOTE: TBD NYI */ + +/* png_set_packing */ +/*NOTE: TBD NYI */ + +/* png_set_packswap */ +/*NOTE: TBD NYI */ + +/* png_set_invert_mono */ +/*NOTE: TBD NYI */ + +/* png_set_shift(png_structp, png_const_color_8p true_bits) */ +/*NOTE: TBD NYI */ + +static void +perform_transform_test(png_modifier *pm) +{ + png_byte colour_type = 0; + png_byte bit_depth = 0; + int palette_number = 0; + + while (next_format(&colour_type, &bit_depth, &palette_number)) + { + png_uint_32 counter = 0; + size_t base_pos; + char name[64]; + + base_pos = safecat(name, sizeof name, 0, "transform:"); + + for (;;) + { + size_t pos = base_pos; + PNG_CONST image_transform *list = 0; + + /* 'max' is currently hardwired to '1'; this should be settable on the + * command line. + */ + counter = image_transform_add(&list, 1/*max*/, counter, + name, sizeof name, &pos, colour_type, bit_depth); + + if (counter == 0) + break; + + /* The command line can change this to checking interlaced images. */ + do + { + pm->repeat = 0; + transform_test(pm, FILEID(colour_type, bit_depth, palette_number, + pm->interlace_type, 0, 0, 0), list, name); + + if (fail(pm)) + return; + } + while (pm->repeat); + } + } +} +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ + +/********************************* GAMMA TESTS ********************************/ +#ifdef PNG_READ_GAMMA_SUPPORTED +/* Reader callbacks and implementations, where they differ from the standard + * ones. + */ +typedef struct gamma_display +{ + standard_display this; + + /* Parameters */ + png_modifier* pm; + double file_gamma; + double screen_gamma; + double background_gamma; + png_byte sbit; + int threshold_test; + int use_input_precision; + int scale16; + int expand16; + int do_background; + png_color_16 background_color; + + /* Local variables */ + double maxerrout; + double maxerrpc; + double maxerrabs; +} gamma_display; + +#define ALPHA_MODE_OFFSET 4 + +static void +gamma_display_init(gamma_display *dp, png_modifier *pm, png_uint_32 id, + double file_gamma, double screen_gamma, png_byte sbit, int threshold_test, + int use_input_precision, int scale16, int expand16, + int do_background, PNG_CONST png_color_16 *pointer_to_the_background_color, + double background_gamma) +{ + /* Standard fields */ + standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/, + pm->use_update_info); + + /* Parameter fields */ + dp->pm = pm; + dp->file_gamma = file_gamma; + dp->screen_gamma = screen_gamma; + dp->background_gamma = background_gamma; + dp->sbit = sbit; + dp->threshold_test = threshold_test; + dp->use_input_precision = use_input_precision; + dp->scale16 = scale16; + dp->expand16 = expand16; + dp->do_background = do_background; + if (do_background && pointer_to_the_background_color != 0) + dp->background_color = *pointer_to_the_background_color; + else + memset(&dp->background_color, 0, sizeof dp->background_color); + + /* Local variable fields */ + dp->maxerrout = dp->maxerrpc = dp->maxerrabs = 0; +} + +static void +gamma_info_imp(gamma_display *dp, png_structp pp, png_infop pi) +{ + /* Reuse the standard stuff as appropriate. */ + standard_info_part1(&dp->this, pp, pi); + + /* If requested strip 16 to 8 bits - this is handled automagically below + * because the output bit depth is read from the library. Note that there + * are interactions with sBIT but, internally, libpng makes sbit at most + * PNG_MAX_GAMMA_8 when doing the following. + */ + if (dp->scale16) +# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + png_set_scale_16(pp); +# else + /* The following works both in 1.5.4 and earlier versions: */ +# ifdef PNG_READ_16_TO_8_SUPPORTED + png_set_strip_16(pp); +# else + png_error(pp, "scale16 (16 to 8 bit conversion) not supported"); +# endif +# endif + + if (dp->expand16) +# ifdef PNG_READ_EXPAND_16_SUPPORTED + png_set_expand_16(pp); +# else + png_error(pp, "expand16 (8 to 16 bit conversion) not supported"); +# endif + + if (dp->do_background >= ALPHA_MODE_OFFSET) + { +# ifdef PNG_READ_ALPHA_MODE_SUPPORTED + { + /* This tests the alpha mode handling, if supported. */ + int mode = dp->do_background - ALPHA_MODE_OFFSET; + + /* The gamma value is the output gamma, and is in the standard, + * non-inverted, represenation. It provides a default for the PNG file + * gamma, but since the file has a gAMA chunk this does not matter. + */ + PNG_CONST double sg = dp->screen_gamma; +# ifndef PNG_FLOATING_POINT_SUPPORTED + PNG_CONST png_fixed_point g = fix(sg); +# endif + +# ifdef PNG_FLOATING_POINT_SUPPORTED + png_set_alpha_mode(pp, mode, sg); +# else + png_set_alpha_mode_fixed(pp, mode, g); +# endif + + /* However, for the standard Porter-Duff algorithm the output defaults + * to be linear, so if the test requires non-linear output it must be + * corrected here. + */ + if (mode == PNG_ALPHA_STANDARD && sg != 1) + { +# ifdef PNG_FLOATING_POINT_SUPPORTED + png_set_gamma(pp, sg, dp->file_gamma); +# else + png_fixed_point f = fix(dp->file_gamma); + png_set_gamma_fixed(pp, g, f); +# endif + } + } +# else + png_error(pp, "alpha mode handling not supported"); +# endif + } + + else + { + /* Set up gamma processing. */ +# ifdef PNG_FLOATING_POINT_SUPPORTED + png_set_gamma(pp, dp->screen_gamma, dp->file_gamma); +# else + { + png_fixed_point s = fix(dp->screen_gamma); + png_fixed_point f = fix(dp->file_gamma); + png_set_gamma_fixed(pp, s, f); + } +# endif + + if (dp->do_background) + { +# ifdef PNG_READ_BACKGROUND_SUPPORTED + /* NOTE: this assumes the caller provided the correct background gamma! + */ + PNG_CONST double bg = dp->background_gamma; +# ifndef PNG_FLOATING_POINT_SUPPORTED + PNG_CONST png_fixed_point g = fix(bg); +# endif + +# ifdef PNG_FLOATING_POINT_SUPPORTED + png_set_background(pp, &dp->background_color, dp->do_background, + 0/*need_expand*/, bg); +# else + png_set_background_fixed(pp, &dp->background_color, + dp->do_background, 0/*need_expand*/, g); +# endif +# else + png_error(pp, "png_set_background not supported"); +# endif + } + } + + { + int i = dp->this.use_update_info; + /* Always do one call, even if use_update_info is 0. */ + do + png_read_update_info(pp, pi); + while (--i > 0); + } + + /* Now we may get a different cbRow: */ + standard_info_part2(&dp->this, pp, pi, 1 /*images*/); +} + +static void +gamma_info(png_structp pp, png_infop pi) +{ + gamma_info_imp(voidcast(gamma_display*, png_get_progressive_ptr(pp)), pp, + pi); +} + +/* Validate a single component value - the routine gets the input and output + * sample values as unscaled PNG component values along with a cache of all the + * information required to validate the values. + */ +typedef struct validate_info +{ + png_structp pp; + gamma_display *dp; + png_byte sbit; + int use_input_precision; + int do_background; + int scale16; + unsigned int sbit_max; + unsigned int isbit_shift; + unsigned int outmax; + + double gamma_correction; /* Overall correction required. */ + double file_inverse; /* Inverse of file gamma. */ + double screen_gamma; + double screen_inverse; /* Inverse of screen gamma. */ + + double background_red; /* Linear background value, red or gray. */ + double background_green; + double background_blue; + + double maxabs; + double maxpc; + double maxcalc; + double maxout; + double maxout_total; /* Total including quantization error */ + double outlog; + int outquant; +} +validate_info; + +static void +init_validate_info(validate_info *vi, gamma_display *dp, png_struct *pp, + int in_depth, int out_depth) +{ + PNG_CONST unsigned int outmax = (1U<pp = pp; + vi->dp = dp; + + if (dp->sbit > 0 && dp->sbit < in_depth) + { + vi->sbit = dp->sbit; + vi->isbit_shift = in_depth - dp->sbit; + } + + else + { + vi->sbit = (png_byte)in_depth; + vi->isbit_shift = 0; + } + + vi->sbit_max = (1U << vi->sbit)-1; + + /* This mimics the libpng threshold test, '0' is used to prevent gamma + * correction in the validation test. + */ + vi->screen_gamma = dp->screen_gamma; + if (fabs(vi->screen_gamma-1) < PNG_GAMMA_THRESHOLD) + vi->screen_gamma = vi->screen_inverse = 0; + else + vi->screen_inverse = 1/vi->screen_gamma; + + vi->use_input_precision = dp->use_input_precision; + vi->outmax = outmax; + vi->maxabs = abserr(dp->pm, in_depth, out_depth); + vi->maxpc = pcerr(dp->pm, in_depth, out_depth); + vi->maxcalc = calcerr(dp->pm, in_depth, out_depth); + vi->maxout = outerr(dp->pm, in_depth, out_depth); + vi->outquant = output_quantization_factor(dp->pm, in_depth, out_depth); + vi->maxout_total = vi->maxout + vi->outquant * .5; + vi->outlog = outlog(dp->pm, in_depth, out_depth); + + if ((dp->this.colour_type & PNG_COLOR_MASK_ALPHA) != 0 || + (dp->this.colour_type == 3 && dp->this.is_transparent)) + { + vi->do_background = dp->do_background; + + if (vi->do_background != 0) + { + PNG_CONST double bg_inverse = 1/dp->background_gamma; + double r, g, b; + + /* Caller must at least put the gray value into the red channel */ + r = dp->background_color.red; r /= outmax; + g = dp->background_color.green; g /= outmax; + b = dp->background_color.blue; b /= outmax; + +# if 0 + /* libpng doesn't do this optimization, if we do pngvalid will fail. + */ + if (fabs(bg_inverse-1) >= PNG_GAMMA_THRESHOLD) +# endif + { + r = pow(r, bg_inverse); + g = pow(g, bg_inverse); + b = pow(b, bg_inverse); + } + + vi->background_red = r; + vi->background_green = g; + vi->background_blue = b; + } + } + else + vi->do_background = 0; + + if (vi->do_background == 0) + vi->background_red = vi->background_green = vi->background_blue = 0; + + vi->gamma_correction = 1/(dp->file_gamma*dp->screen_gamma); + if (fabs(vi->gamma_correction-1) < PNG_GAMMA_THRESHOLD) + vi->gamma_correction = 0; + + vi->file_inverse = 1/dp->file_gamma; + if (fabs(vi->file_inverse-1) < PNG_GAMMA_THRESHOLD) + vi->file_inverse = 0; + + vi->scale16 = dp->scale16; +} + +/* This function handles composition of a single non-alpha component. The + * argument is the input sample value, in the range 0..1, and the alpha value. + * The result is the composed, linear, input sample. If alpha is less than zero + * this is the alpha component and the function should not be called! + */ +static double +gamma_component_compose(int do_background, double input_sample, double alpha, + double background, int *compose) +{ + switch (do_background) + { + case PNG_BACKGROUND_GAMMA_SCREEN: + case PNG_BACKGROUND_GAMMA_FILE: + case PNG_BACKGROUND_GAMMA_UNIQUE: + /* Standard PNG background processing. */ + if (alpha < 1) + { + if (alpha > 0) + { + input_sample = input_sample * alpha + background * (1-alpha); + if (compose != NULL) + *compose = 1; + } + + else + input_sample = background; + } + break; + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: + case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: + /* The components are premultiplied in either case and the output is + * gamma encoded (to get standard Porter-Duff we expect the output + * gamma to be set to 1.0!) + */ + case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: + /* The optimization is that the partial-alpha entries are linear + * while the opaque pixels are gamma encoded, but this only affects the + * output encoding. + */ + if (alpha < 1) + { + if (alpha > 0) + { + input_sample *= alpha; + if (compose != NULL) + *compose = 1; + } + + else + input_sample = 0; + } + break; +#endif + + default: + /* Standard cases where no compositing is done (so the component + * value is already correct.) + */ + break; + } + + return input_sample; +} + +/* This API returns the encoded *input* component, in the range 0..1 */ +static double +gamma_component_validate(PNG_CONST char *name, PNG_CONST validate_info *vi, + PNG_CONST unsigned int id, PNG_CONST unsigned int od, + PNG_CONST double alpha /* <0 for the alpha channel itself */, + PNG_CONST double background /* component background value */) +{ + PNG_CONST unsigned int isbit = id >> vi->isbit_shift; + PNG_CONST unsigned int sbit_max = vi->sbit_max; + PNG_CONST unsigned int outmax = vi->outmax; + PNG_CONST int do_background = vi->do_background; + + double i; + + /* First check on the 'perfect' result obtained from the digitized input + * value, id, and compare this against the actual digitized result, 'od'. + * 'i' is the input result in the range 0..1: + */ + i = isbit; i /= sbit_max; + + /* Check for the fast route: if we don't do any background composition or if + * this is the alpha channel ('alpha' < 0) or if the pixel is opaque then + * just use the gamma_correction field to correct to the final output gamma. + */ + if (alpha == 1 /* opaque pixel component */ || !do_background +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + || do_background == ALPHA_MODE_OFFSET + PNG_ALPHA_PNG +#endif + || (alpha < 0 /* alpha channel */ +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + && do_background != ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN +#endif + )) + { + /* Then get the gamma corrected version of 'i' and compare to 'od', any + * error less than .5 is insignificant - just quantization of the output + * value to the nearest digital value (nevertheless the error is still + * recorded - it's interesting ;-) + */ + double encoded_sample = i; + double encoded_error; + + /* alpha less than 0 indicates the alpha channel, which is always linear + */ + if (alpha >= 0 && vi->gamma_correction > 0) + encoded_sample = pow(encoded_sample, vi->gamma_correction); + encoded_sample *= outmax; + + encoded_error = fabs(od-encoded_sample); + + if (encoded_error > vi->dp->maxerrout) + vi->dp->maxerrout = encoded_error; + + if (encoded_error < vi->maxout_total && encoded_error < vi->outlog) + return i; + } + + /* The slow route - attempt to do linear calculations. */ + /* There may be an error, or background processing is required, so calculate + * the actual sample values - unencoded light intensity values. Note that in + * practice these are not completely unencoded because they include a + * 'viewing correction' to decrease or (normally) increase the perceptual + * contrast of the image. There's nothing we can do about this - we don't + * know what it is - so assume the unencoded value is perceptually linear. + */ + { + double input_sample = i; /* In range 0..1 */ + double output, error, encoded_sample, encoded_error; + double es_lo, es_hi; + int compose = 0; /* Set to one if composition done */ + int output_is_encoded; /* Set if encoded to screen gamma */ + int log_max_error = 1; /* Check maximum error values */ + png_const_charp pass = 0; /* Reason test passes (or 0 for fail) */ + + /* Convert to linear light (with the above caveat.) The alpha channel is + * already linear. + */ + if (alpha >= 0) + { + int tcompose; + + if (vi->file_inverse > 0) + input_sample = pow(input_sample, vi->file_inverse); + + /* Handle the compose processing: */ + tcompose = 0; + input_sample = gamma_component_compose(do_background, input_sample, + alpha, background, &tcompose); + + if (tcompose) + compose = 1; + } + + /* And similarly for the output value, but we need to check the background + * handling to linearize it correctly. + */ + output = od; + output /= outmax; + + output_is_encoded = vi->screen_gamma > 0; + + if (alpha < 0) /* The alpha channel */ + { +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + if (do_background != ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN) +#endif + { + /* In all other cases the output alpha channel is linear already, + * don't log errors here, they are much larger in linear data. + */ + output_is_encoded = 0; + log_max_error = 0; + } + } + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + else /* A component */ + { + if (do_background == ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED && + alpha < 1) /* the optimized case - linear output */ + { + if (alpha > 0) log_max_error = 0; + output_is_encoded = 0; + } + } +#endif + + if (output_is_encoded) + output = pow(output, vi->screen_gamma); + + /* Calculate (or recalculate) the encoded_sample value and repeat the + * check above (unnecessary if we took the fast route, but harmless.) + */ + encoded_sample = input_sample; + if (output_is_encoded) + encoded_sample = pow(encoded_sample, vi->screen_inverse); + encoded_sample *= outmax; + + encoded_error = fabs(od-encoded_sample); + + /* Don't log errors in the alpha channel, or the 'optimized' case, + * neither are significant to the overall perception. + */ + if (log_max_error && encoded_error > vi->dp->maxerrout) + vi->dp->maxerrout = encoded_error; + + if (encoded_error < vi->maxout_total) + { + if (encoded_error < vi->outlog) + return i; + + /* Test passed but error is bigger than the log limit, record why the + * test passed: + */ + pass = "less than maxout:\n"; + } + + /* i: the original input value in the range 0..1 + * + * pngvalid calculations: + * input_sample: linear result; i linearized and composed, range 0..1 + * encoded_sample: encoded result; input_sample scaled to ouput bit depth + * + * libpng calculations: + * output: linear result; od scaled to 0..1 and linearized + * od: encoded result from libpng + */ + + /* Now we have the numbers for real errors, both absolute values as as a + * percentage of the correct value (output): + */ + error = fabs(input_sample-output); + + if (log_max_error && error > vi->dp->maxerrabs) + vi->dp->maxerrabs = error; + + /* The following is an attempt to ignore the tendency of quantization to + * dominate the percentage errors for lower result values: + */ + if (log_max_error && input_sample > .5) + { + double percentage_error = error/input_sample; + if (percentage_error > vi->dp->maxerrpc) + vi->dp->maxerrpc = percentage_error; + } + + /* Now calculate the digitization limits for 'encoded_sample' using the + * 'max' values. Note that maxout is in the encoded space but maxpc and + * maxabs are in linear light space. + * + * First find the maximum error in linear light space, range 0..1: + */ + { + double tmp = input_sample * vi->maxpc; + if (tmp < vi->maxabs) tmp = vi->maxabs; + /* If 'compose' is true the composition was done in linear space using + * integer arithmetic. This introduces an extra error of +/- 0.5 (at + * least) in the integer space used. 'maxcalc' records this, taking + * into account the possibility that even for 16 bit output 8 bit space + * may have been used. + */ + if (compose && tmp < vi->maxcalc) tmp = vi->maxcalc; + + /* The 'maxout' value refers to the encoded result, to compare with + * this encode input_sample adjusted by the maximum error (tmp) above. + */ + es_lo = encoded_sample - vi->maxout; + + if (es_lo > 0 && input_sample-tmp > 0) + { + double low_value = input_sample-tmp; + if (output_is_encoded) + low_value = pow(low_value, vi->screen_inverse); + low_value *= outmax; + if (low_value < es_lo) es_lo = low_value; + + /* Quantize this appropriately: */ + es_lo = ceil(es_lo / vi->outquant - .5) * vi->outquant; + } + + else + es_lo = 0; + + es_hi = encoded_sample + vi->maxout; + + if (es_hi < outmax && input_sample+tmp < 1) + { + double high_value = input_sample+tmp; + if (output_is_encoded) + high_value = pow(high_value, vi->screen_inverse); + high_value *= outmax; + if (high_value > es_hi) es_hi = high_value; + + es_hi = floor(es_hi / vi->outquant + .5) * vi->outquant; + } + + else + es_hi = outmax; + } + + /* The primary test is that the final encoded value returned by the + * library should be between the two limits (inclusive) that were + * calculated above. + */ + if (od >= es_lo && od <= es_hi) + { + /* The value passes, but we may need to log the information anyway. */ + if (encoded_error < vi->outlog) + return i; + + if (pass == 0) + pass = "within digitization limits:\n"; + } + + { + /* There has been an error in processing, or we need to log this + * value. + */ + double is_lo, is_hi; + + /* pass is set at this point if either of the tests above would have + * passed. Don't do these additional tests here - just log the + * original [es_lo..es_hi] values. + */ + if (pass == 0 && vi->use_input_precision) + { + /* Ok, something is wrong - this actually happens in current libpng + * 16-to-8 processing. Assume that the input value (id, adjusted + * for sbit) can be anywhere between value-.5 and value+.5 - quite a + * large range if sbit is low. + */ + double tmp = (isbit - .5)/sbit_max; + + if (tmp <= 0) + tmp = 0; + + else if (alpha >= 0 && vi->file_inverse > 0 && tmp < 1) + tmp = pow(tmp, vi->file_inverse); + + tmp = gamma_component_compose(do_background, tmp, alpha, background, + NULL); + + if (output_is_encoded && tmp > 0 && tmp < 1) + tmp = pow(tmp, vi->screen_inverse); + + is_lo = ceil(outmax * tmp - vi->maxout_total); + + if (is_lo < 0) + is_lo = 0; + + tmp = (isbit + .5)/sbit_max; + + if (tmp <= 0) + tmp = 0; + + else if (alpha >= 0 && vi->file_inverse > 0 && tmp < 1) + tmp = pow(tmp, vi->file_inverse); + + tmp = gamma_component_compose(do_background, tmp, alpha, background, + NULL); + + if (output_is_encoded && tmp > 0 && tmp < 1) + tmp = pow(tmp, vi->screen_inverse); + + is_hi = floor(outmax * tmp + vi->maxout_total); + + if (is_hi > outmax) + is_hi = outmax; + + if (!(od < is_lo || od > is_hi)) + { + if (encoded_error < vi->outlog) + return i; + + pass = "within input precision limits:\n"; + } + + /* One last chance. If this is an alpha channel and the 16to8 + * option has been used and 'inaccurate' scaling is used then the + * bit reduction is obtained by simply using the top 8 bits of the + * value. + * + * This is only done for older libpng versions when the 'inaccurate' + * (chop) method of scaling was used. + */ +# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED +# if PNG_LIBPNG_VER < 10504 + /* This may be required for other components in the future, + * but at present the presence of gamma correction effectively + * prevents the errors in the component scaling (I don't quite + * understand why, but since it's better this way I care not + * to ask, JB 20110419.) + */ + if (pass == 0 && alpha < 0 && vi->scale16 && vi->sbit > 8 && + vi->sbit + vi->isbit_shift == 16) + { + tmp = ((id >> 8) - .5)/255; + + if (tmp > 0) + { + is_lo = ceil(outmax * tmp - vi->maxout_total); + if (is_lo < 0) is_lo = 0; + } + + else + is_lo = 0; + + tmp = ((id >> 8) + .5)/255; + + if (tmp < 1) + { + is_hi = floor(outmax * tmp + vi->maxout_total); + if (is_hi > outmax) is_hi = outmax; + } + + else + is_hi = outmax; + + if (!(od < is_lo || od > is_hi)) + { + if (encoded_error < vi->outlog) + return i; + + pass = "within 8 bit limits:\n"; + } + } +# endif +# endif + } + else /* !use_input_precision */ + is_lo = es_lo, is_hi = es_hi; + + /* Attempt to output a meaningful error/warning message: the message + * output depends on the background/composite operation being performed + * because this changes what parameters were actually used above. + */ + { + size_t pos = 0; + /* Need either 1/255 or 1/65535 precision here; 3 or 6 decimal + * places. Just use outmax to work out which. + */ + int precision = (outmax >= 1000 ? 6 : 3); + int use_input=1, use_background=0, do_compose=0; + char msg[256]; + + if (pass != 0) + pos = safecat(msg, sizeof msg, pos, "\n\t"); + + /* Set up the various flags, the output_is_encoded flag above + * is also used below. do_compose is just a double check. + */ + switch (do_background) + { + case PNG_BACKGROUND_GAMMA_SCREEN: + case PNG_BACKGROUND_GAMMA_FILE: + case PNG_BACKGROUND_GAMMA_UNIQUE: + use_background = (alpha >= 0 && alpha < 1); + /*FALL THROUGH*/ +# ifdef PNG_READ_ALPHA_MODE_SUPPORTED + case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: + case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: + case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: +# endif /* ALPHA_MODE_SUPPORTED */ + do_compose = (alpha > 0 && alpha < 1); + use_input = (alpha != 0); + break; + + default: + break; + } + + /* Check the 'compose' flag */ + if (compose != do_compose) + png_error(vi->pp, "internal error (compose)"); + + /* 'name' is the component name */ + pos = safecat(msg, sizeof msg, pos, name); + pos = safecat(msg, sizeof msg, pos, "("); + pos = safecatn(msg, sizeof msg, pos, id); + if (use_input || pass != 0/*logging*/) + { + if (isbit != id) + { + /* sBIT has reduced the precision of the input: */ + pos = safecat(msg, sizeof msg, pos, ", sbit("); + pos = safecatn(msg, sizeof msg, pos, vi->sbit); + pos = safecat(msg, sizeof msg, pos, "): "); + pos = safecatn(msg, sizeof msg, pos, isbit); + } + pos = safecat(msg, sizeof msg, pos, "/"); + /* The output is either "id/max" or "id sbit(sbit): isbit/max" */ + pos = safecatn(msg, sizeof msg, pos, vi->sbit_max); + } + pos = safecat(msg, sizeof msg, pos, ")"); + + /* A component may have been multiplied (in linear space) by the + * alpha value, 'compose' says whether this is relevant. + */ + if (compose || pass != 0) + { + /* If any form of composition is being done report our + * calculated linear value here (the code above doesn't record + * the input value before composition is performed, so what + * gets reported is the value after composition.) + */ + if (use_input || pass != 0) + { + if (vi->file_inverse > 0) + { + pos = safecat(msg, sizeof msg, pos, "^"); + pos = safecatd(msg, sizeof msg, pos, vi->file_inverse, 2); + } + + else + pos = safecat(msg, sizeof msg, pos, "[linear]"); + + pos = safecat(msg, sizeof msg, pos, "*(alpha)"); + pos = safecatd(msg, sizeof msg, pos, alpha, precision); + } + + /* Now record the *linear* background value if it was used + * (this function is not passed the original, non-linear, + * value but it is contained in the test name.) + */ + if (use_background) + { + pos = safecat(msg, sizeof msg, pos, use_input ? "+" : " "); + pos = safecat(msg, sizeof msg, pos, "(background)"); + pos = safecatd(msg, sizeof msg, pos, background, precision); + pos = safecat(msg, sizeof msg, pos, "*"); + pos = safecatd(msg, sizeof msg, pos, 1-alpha, precision); + } + } + + /* Report the calculated value (input_sample) and the linearized + * libpng value (output) unless this is just a component gamma + * correction. + */ + if (compose || alpha < 0 || pass != 0) + { + pos = safecat(msg, sizeof msg, pos, + pass != 0 ? " =\n\t" : " = "); + pos = safecatd(msg, sizeof msg, pos, input_sample, precision); + pos = safecat(msg, sizeof msg, pos, " (libpng: "); + pos = safecatd(msg, sizeof msg, pos, output, precision); + pos = safecat(msg, sizeof msg, pos, ")"); + + /* Finally report the output gamma encoding, if any. */ + if (output_is_encoded) + { + pos = safecat(msg, sizeof msg, pos, " ^"); + pos = safecatd(msg, sizeof msg, pos, vi->screen_inverse, 2); + pos = safecat(msg, sizeof msg, pos, "(to screen) ="); + } + + else + pos = safecat(msg, sizeof msg, pos, " [screen is linear] ="); + } + + if ((!compose && alpha >= 0) || pass != 0) + { + if (pass != 0) /* logging */ + pos = safecat(msg, sizeof msg, pos, "\n\t[overall:"); + + /* This is the non-composition case, the internal linear + * values are irrelevant (though the log below will reveal + * them.) Output a much shorter warning/error message and report + * the overall gamma correction. + */ + if (vi->gamma_correction > 0) + { + pos = safecat(msg, sizeof msg, pos, " ^"); + pos = safecatd(msg, sizeof msg, pos, vi->gamma_correction, 2); + pos = safecat(msg, sizeof msg, pos, "(gamma correction) ="); + } + + else + pos = safecat(msg, sizeof msg, pos, + " [no gamma correction] ="); + + if (pass != 0) + pos = safecat(msg, sizeof msg, pos, "]"); + } + + /* This is our calculated encoded_sample which should (but does + * not) match od: + */ + pos = safecat(msg, sizeof msg, pos, pass != 0 ? "\n\t" : " "); + pos = safecatd(msg, sizeof msg, pos, is_lo, 1); + pos = safecat(msg, sizeof msg, pos, " < "); + pos = safecatd(msg, sizeof msg, pos, encoded_sample, 1); + pos = safecat(msg, sizeof msg, pos, " (libpng: "); + pos = safecatn(msg, sizeof msg, pos, od); + pos = safecat(msg, sizeof msg, pos, ")"); + pos = safecat(msg, sizeof msg, pos, "/"); + pos = safecatn(msg, sizeof msg, pos, outmax); + pos = safecat(msg, sizeof msg, pos, " < "); + pos = safecatd(msg, sizeof msg, pos, is_hi, 1); + + if (pass == 0) /* The error condition */ + { +# ifdef PNG_WARNINGS_SUPPORTED + png_warning(vi->pp, msg); +# else + store_warning(vi->pp, msg); +# endif + } + + else /* logging this value */ + store_verbose(&vi->dp->pm->this, vi->pp, pass, msg); + } + } + } + + return i; +} + +static void +gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) +{ + /* Get some constants derived from the input and output file formats: */ + PNG_CONST png_store* PNG_CONST ps = dp->this.ps; + PNG_CONST png_byte in_ct = dp->this.colour_type; + PNG_CONST png_byte in_bd = dp->this.bit_depth; + PNG_CONST png_uint_32 w = dp->this.w; + PNG_CONST png_uint_32 h = dp->this.h; + PNG_CONST size_t cbRow = dp->this.cbRow; + PNG_CONST png_byte out_ct = png_get_color_type(pp, pi); + PNG_CONST png_byte out_bd = png_get_bit_depth(pp, pi); + + /* There are three sources of error, firstly the quantization in the + * file encoding, determined by sbit and/or the file depth, secondly + * the output (screen) gamma and thirdly the output file encoding. + * + * Since this API receives the screen and file gamma in double + * precision it is possible to calculate an exact answer given an input + * pixel value. Therefore we assume that the *input* value is exact - + * sample/maxsample - calculate the corresponding gamma corrected + * output to the limits of double precision arithmetic and compare with + * what libpng returns. + * + * Since the library must quantize the output to 8 or 16 bits there is + * a fundamental limit on the accuracy of the output of +/-.5 - this + * quantization limit is included in addition to the other limits + * specified by the paramaters to the API. (Effectively, add .5 + * everywhere.) + * + * The behavior of the 'sbit' paramter is defined by section 12.5 + * (sample depth scaling) of the PNG spec. That section forces the + * decoder to assume that the PNG values have been scaled if sBIT is + * present: + * + * png-sample = floor( input-sample * (max-out/max-in) + .5); + * + * This means that only a subset of the possible PNG values should + * appear in the input. However, the spec allows the encoder to use a + * variety of approximations to the above and doesn't require any + * restriction of the values produced. + * + * Nevertheless the spec requires that the upper 'sBIT' bits of the + * value stored in a PNG file be the original sample bits. + * Consequently the code below simply scales the top sbit bits by + * (1<this.palette; + PNG_CONST int in_is_transparent = dp->this.is_transparent; + int out_npalette = -1; + int out_is_transparent = 0; /* Just refers to the palette case */ + store_palette out_palette; + validate_info vi; + + /* Check for row overwrite errors */ + store_image_check(dp->this.ps, pp, 0); + + /* Supply the input and output sample depths here - 8 for an indexed image, + * otherwise the bit depth. + */ + init_validate_info(&vi, dp, pp, in_ct==3?8:in_bd, out_ct==3?8:out_bd); + + processing = (vi.gamma_correction > 0 && !dp->threshold_test) + || in_bd != out_bd || in_ct != out_ct || vi.do_background; + + /* TODO: FIX THIS: MAJOR BUG! If the transformations all happen inside + * the palette there is no way of finding out, because libpng fails to + * update the palette on png_read_update_info. Indeed, libpng doesn't + * even do the required work until much later, when it doesn't have any + * info pointer. Oops. For the moment 'processing' is turned off if + * out_ct is palette. + */ + if (in_ct == 3 && out_ct == 3) + processing = 0; + + if (processing && out_ct == 3) + out_is_transparent = read_palette(out_palette, &out_npalette, pp, pi); + + for (y=0; ythis.palette[in_index].alpha : + sample(std, in_ct, in_bd, x, samples_per_pixel); + + unsigned int output_alpha = 65536 /* as a flag value */; + + if (out_ct == 3) + { + if (out_is_transparent) + output_alpha = out_palette[out_index].alpha; + } + + else if ((out_ct & PNG_COLOR_MASK_ALPHA) != 0) + output_alpha = sample(pRow, out_ct, out_bd, x, + samples_per_pixel); + + if (output_alpha != 65536) + alpha = gamma_component_validate("alpha", &vi, input_alpha, + output_alpha, -1/*alpha*/, 0/*background*/); + + else /* no alpha in output */ + { + /* This is a copy of the calculation of 'i' above in order to + * have the alpha value to use in the background calculation. + */ + alpha = input_alpha >> vi.isbit_shift; + alpha /= vi.sbit_max; + } + } + + /* Handle grayscale or RGB components. */ + if ((in_ct & PNG_COLOR_MASK_COLOR) == 0) /* grayscale */ + (void)gamma_component_validate("gray", &vi, + sample(std, in_ct, in_bd, x, 0), + sample(pRow, out_ct, out_bd, x, 0), alpha/*component*/, + vi.background_red); + else /* RGB or palette */ + { + (void)gamma_component_validate("red", &vi, + in_ct == 3 ? in_palette[in_index].red : + sample(std, in_ct, in_bd, x, 0), + out_ct == 3 ? out_palette[out_index].red : + sample(pRow, out_ct, out_bd, x, 0), + alpha/*component*/, vi.background_red); + + (void)gamma_component_validate("green", &vi, + in_ct == 3 ? in_palette[in_index].green : + sample(std, in_ct, in_bd, x, 1), + out_ct == 3 ? out_palette[out_index].green : + sample(pRow, out_ct, out_bd, x, 1), + alpha/*component*/, vi.background_green); + + (void)gamma_component_validate("blue", &vi, + in_ct == 3 ? in_palette[in_index].blue : + sample(std, in_ct, in_bd, x, 2), + out_ct == 3 ? out_palette[out_index].blue : + sample(pRow, out_ct, out_bd, x, 2), + alpha/*component*/, vi.background_blue); + } + } + } + + else if (memcmp(std, pRow, cbRow) != 0) + { + char msg[64]; + + /* No transform is expected on the threshold tests. */ + sprintf(msg, "gamma: below threshold row %d changed", y); + + png_error(pp, msg); + } + } /* row (y) loop */ + + dp->this.ps->validated = 1; +} + +static void +gamma_end(png_structp pp, png_infop pi) +{ + gamma_display *dp = voidcast(gamma_display*, png_get_progressive_ptr(pp)); + + if (!dp->this.speed) + gamma_image_validate(dp, pp, pi); + else + dp->this.ps->validated = 1; +} + +/* A single test run checking a gamma transformation. + * + * maxabs: maximum absolute error as a fraction + * maxout: maximum output error in the output units + * maxpc: maximum percentage error (as a percentage) + */ +static void +gamma_test(png_modifier *pmIn, PNG_CONST png_byte colour_typeIn, + PNG_CONST png_byte bit_depthIn, PNG_CONST int palette_numberIn, + PNG_CONST int interlace_typeIn, + PNG_CONST double file_gammaIn, PNG_CONST double screen_gammaIn, + PNG_CONST png_byte sbitIn, PNG_CONST int threshold_testIn, + PNG_CONST char *name, + PNG_CONST int use_input_precisionIn, PNG_CONST int scale16In, + PNG_CONST int expand16In, PNG_CONST int do_backgroundIn, + PNG_CONST png_color_16 *bkgd_colorIn, double bkgd_gammaIn) +{ + gamma_display d; + context(&pmIn->this, fault); + + gamma_display_init(&d, pmIn, FILEID(colour_typeIn, bit_depthIn, + palette_numberIn, interlace_typeIn, 0, 0, 0), + file_gammaIn, screen_gammaIn, sbitIn, + threshold_testIn, use_input_precisionIn, scale16In, + expand16In, do_backgroundIn, bkgd_colorIn, bkgd_gammaIn); + + Try + { + png_structp pp; + png_infop pi; + gama_modification gama_mod; + srgb_modification srgb_mod; + sbit_modification sbit_mod; + + /* For the moment don't use the png_modifier support here. */ + d.pm->encoding_counter = 0; + modifier_set_encoding(d.pm); /* Just resets everything */ + d.pm->current_gamma = d.file_gamma; + + /* Make an appropriate modifier to set the PNG file gamma to the + * given gamma value and the sBIT chunk to the given precision. + */ + d.pm->modifications = NULL; + gama_modification_init(&gama_mod, d.pm, d.file_gamma); + srgb_modification_init(&srgb_mod, d.pm, 127 /*delete*/); + if (d.sbit > 0) + sbit_modification_init(&sbit_mod, d.pm, d.sbit); + + modification_reset(d.pm->modifications); + + /* Get a png_struct for writing the image. */ + pp = set_modifier_for_read(d.pm, &pi, d.this.id, name); + standard_palette_init(&d.this); + + /* Introduce the correct read function. */ + if (d.pm->this.progressive) + { + /* Share the row function with the standard implementation. */ + png_set_progressive_read_fn(pp, &d, gamma_info, progressive_row, + gamma_end); + + /* Now feed data into the reader until we reach the end: */ + modifier_progressive_read(d.pm, pp, pi); + } + else + { + /* modifier_read expects a png_modifier* */ + png_set_read_fn(pp, d.pm, modifier_read); + + /* Check the header values: */ + png_read_info(pp, pi); + + /* Process the 'info' requirements. Only one image is generated */ + gamma_info_imp(&d, pp, pi); + + sequential_row(&d.this, pp, pi, -1, 0); + + if (!d.this.speed) + gamma_image_validate(&d, pp, pi); + else + d.this.ps->validated = 1; + } + + modifier_reset(d.pm); + + if (d.pm->log && !d.threshold_test && !d.this.speed) + fprintf(stderr, "%d bit %s %s: max error %f (%.2g, %2g%%)\n", + d.this.bit_depth, colour_types[d.this.colour_type], name, + d.maxerrout, d.maxerrabs, 100*d.maxerrpc); + + /* Log the summary values too. */ + if (d.this.colour_type == 0 || d.this.colour_type == 4) + { + switch (d.this.bit_depth) + { + case 1: + break; + + case 2: + if (d.maxerrout > d.pm->error_gray_2) + d.pm->error_gray_2 = d.maxerrout; + + break; + + case 4: + if (d.maxerrout > d.pm->error_gray_4) + d.pm->error_gray_4 = d.maxerrout; + + break; + + case 8: + if (d.maxerrout > d.pm->error_gray_8) + d.pm->error_gray_8 = d.maxerrout; + + break; + + case 16: + if (d.maxerrout > d.pm->error_gray_16) + d.pm->error_gray_16 = d.maxerrout; + + break; + + default: + png_error(pp, "bad bit depth (internal: 1)"); + } + } + + else if (d.this.colour_type == 2 || d.this.colour_type == 6) + { + switch (d.this.bit_depth) + { + case 8: + + if (d.maxerrout > d.pm->error_color_8) + d.pm->error_color_8 = d.maxerrout; + + break; + + case 16: + + if (d.maxerrout > d.pm->error_color_16) + d.pm->error_color_16 = d.maxerrout; + + break; + + default: + png_error(pp, "bad bit depth (internal: 2)"); + } + } + + else if (d.this.colour_type == 3) + { + if (d.maxerrout > d.pm->error_indexed) + d.pm->error_indexed = d.maxerrout; + } + } + + Catch(fault) + modifier_reset((png_modifier*)fault); +} + +static void gamma_threshold_test(png_modifier *pm, png_byte colour_type, + png_byte bit_depth, int interlace_type, double file_gamma, + double screen_gamma) +{ + size_t pos = 0; + char name[64]; + pos = safecat(name, sizeof name, pos, "threshold "); + pos = safecatd(name, sizeof name, pos, file_gamma, 3); + pos = safecat(name, sizeof name, pos, "/"); + pos = safecatd(name, sizeof name, pos, screen_gamma, 3); + + (void)gamma_test(pm, colour_type, bit_depth, 0/*palette*/, interlace_type, + file_gamma, screen_gamma, 0/*sBIT*/, 1/*threshold test*/, name, + 0 /*no input precision*/, + 0 /*no scale16*/, 0 /*no expand16*/, 0 /*no background*/, 0 /*hence*/, + 0 /*no background gamma*/); +} + +static void +perform_gamma_threshold_tests(png_modifier *pm) +{ + png_byte colour_type = 0; + png_byte bit_depth = 0; + int palette_number = 0; + + /* Don't test more than one instance of each palette - it's pointless, in + * fact this test is somewhat excessive since libpng doesn't make this + * decision based on colour type or bit depth! + */ + while (next_format(&colour_type, &bit_depth, &palette_number)) + if (palette_number == 0) + { + double test_gamma = 1.0; + while (test_gamma >= .4) + { + /* There's little point testing the interlacing vs non-interlacing, + * but this can be set from the command line. + */ + gamma_threshold_test(pm, colour_type, bit_depth, pm->interlace_type, + test_gamma, 1/test_gamma); + test_gamma *= .95; + } + + /* And a special test for sRGB */ + gamma_threshold_test(pm, colour_type, bit_depth, pm->interlace_type, + .45455, 2.2); + + if (fail(pm)) + return; + } +} + +static void gamma_transform_test(png_modifier *pm, + PNG_CONST png_byte colour_type, PNG_CONST png_byte bit_depth, + PNG_CONST int palette_number, + PNG_CONST int interlace_type, PNG_CONST double file_gamma, + PNG_CONST double screen_gamma, PNG_CONST png_byte sbit, + PNG_CONST int use_input_precision, PNG_CONST int scale16) +{ + size_t pos = 0; + char name[64]; + + if (sbit != bit_depth && sbit != 0) + { + pos = safecat(name, sizeof name, pos, "sbit("); + pos = safecatn(name, sizeof name, pos, sbit); + pos = safecat(name, sizeof name, pos, ") "); + } + + else + pos = safecat(name, sizeof name, pos, "gamma "); + + if (scale16) + pos = safecat(name, sizeof name, pos, "16to8 "); + + pos = safecatd(name, sizeof name, pos, file_gamma, 3); + pos = safecat(name, sizeof name, pos, "->"); + pos = safecatd(name, sizeof name, pos, screen_gamma, 3); + + gamma_test(pm, colour_type, bit_depth, palette_number, interlace_type, + file_gamma, screen_gamma, sbit, 0, name, use_input_precision, + scale16, pm->test_gamma_expand16, 0 , 0, 0); +} + +static void perform_gamma_transform_tests(png_modifier *pm) +{ + png_byte colour_type = 0; + png_byte bit_depth = 0; + int palette_number = 0; + + while (next_format(&colour_type, &bit_depth, &palette_number)) + { + unsigned int i, j; + + for (i=0; ingamma_tests; ++i) for (j=0; jngamma_tests; ++j) + if (i != j) + { + gamma_transform_test(pm, colour_type, bit_depth, palette_number, + pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], 0/*sBIT*/, + pm->use_input_precision, 0 /*do not scale16*/); + + if (fail(pm)) + return; + } + } +} + +static void perform_gamma_sbit_tests(png_modifier *pm) +{ + png_byte sbit; + + /* The only interesting cases are colour and grayscale, alpha is ignored here + * for overall speed. Only bit depths where sbit is less than the bit depth + * are tested. + */ + for (sbit=pm->sbitlow; sbit<(1<ngamma_tests; ++i) + { + unsigned int j; + + for (j=0; jngamma_tests; ++j) if (i != j) + { + gamma_transform_test(pm, colour_type, bit_depth, npalette, + pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], + sbit, pm->use_input_precision_sbit, 0 /*scale16*/); + + if (fail(pm)) + return; + } + } + } + } +} + +/* Note that this requires a 16 bit source image but produces 8 bit output, so + * we only need the 16bit write support, but the 16 bit images are only + * generated if DO_16BIT is defined. + */ +#ifdef DO_16BIT +static void perform_gamma_scale16_tests(png_modifier *pm) +{ +# ifndef PNG_MAX_GAMMA_8 +# define PNG_MAX_GAMMA_8 11 +# endif + /* Include the alpha cases here. Note that sbit matches the internal value + * used by the library - otherwise we will get spurious errors from the + * internal sbit style approximation. + * + * The threshold test is here because otherwise the 16 to 8 conversion will + * proceed *without* gamma correction, and the tests above will fail (but not + * by much) - this could be fixed, it only appears with the -g option. + */ + unsigned int i, j; + for (i=0; ingamma_tests; ++i) + { + for (j=0; jngamma_tests; ++j) + { + if (i != j && + fabs(pm->gammas[j]/pm->gammas[i]-1) >= PNG_GAMMA_THRESHOLD) + { + gamma_transform_test(pm, 0, 16, 0, pm->interlace_type, + 1/pm->gammas[i], pm->gammas[j], PNG_MAX_GAMMA_8, + pm->use_input_precision_16to8, 1 /*scale16*/); + + if (fail(pm)) + return; + + gamma_transform_test(pm, 2, 16, 0, pm->interlace_type, + 1/pm->gammas[i], pm->gammas[j], PNG_MAX_GAMMA_8, + pm->use_input_precision_16to8, 1 /*scale16*/); + + if (fail(pm)) + return; + + gamma_transform_test(pm, 4, 16, 0, pm->interlace_type, + 1/pm->gammas[i], pm->gammas[j], PNG_MAX_GAMMA_8, + pm->use_input_precision_16to8, 1 /*scale16*/); + + if (fail(pm)) + return; + + gamma_transform_test(pm, 6, 16, 0, pm->interlace_type, + 1/pm->gammas[i], pm->gammas[j], PNG_MAX_GAMMA_8, + pm->use_input_precision_16to8, 1 /*scale16*/); + + if (fail(pm)) + return; + } + } + } +} +#endif /* 16 to 8 bit conversion */ + +#if defined PNG_READ_BACKGROUND_SUPPORTED ||\ + defined PNG_READ_ALPHA_MODE_SUPPORTED +static void gamma_composition_test(png_modifier *pm, + PNG_CONST png_byte colour_type, PNG_CONST png_byte bit_depth, + PNG_CONST int palette_number, + PNG_CONST int interlace_type, PNG_CONST double file_gamma, + PNG_CONST double screen_gamma, + PNG_CONST int use_input_precision, PNG_CONST int do_background, + PNG_CONST int expand_16) +{ + size_t pos = 0; + png_const_charp base; + double bg; + char name[128]; + png_color_16 background; + + /* Make up a name and get an appropriate background gamma value. */ + switch (do_background) + { + default: + base = ""; + bg = 4; /* should not be used */ + break; + case PNG_BACKGROUND_GAMMA_SCREEN: + base = " bckg(Screen):"; + bg = 1/screen_gamma; + break; + case PNG_BACKGROUND_GAMMA_FILE: + base = " bckg(File):"; + bg = file_gamma; + break; + case PNG_BACKGROUND_GAMMA_UNIQUE: + base = " bckg(Unique):"; + /* This tests the handling of a unique value, the math is such that the + * value tends to be <1, but is neither screen nor file (even if they + * match!) + */ + bg = (file_gamma + screen_gamma) / 3; + break; +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + case ALPHA_MODE_OFFSET + PNG_ALPHA_PNG: + base = " alpha(PNG)"; + bg = 4; /* should not be used */ + break; + case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: + base = " alpha(Porter-Duff)"; + bg = 4; /* should not be used */ + break; + case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: + base = " alpha(Optimized)"; + bg = 4; /* should not be used */ + break; + case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: + base = " alpha(Broken)"; + bg = 4; /* should not be used */ + break; +#endif + } + + /* Use random background values - the background is always presented in the + * output space (8 or 16 bit components). + */ + if (expand_16 || bit_depth == 16) + { + png_uint_32 r = random_32(); + + background.red = (png_uint_16)r; + background.green = (png_uint_16)(r >> 16); + r = random_32(); + background.blue = (png_uint_16)r; + background.gray = (png_uint_16)(r >> 16); + } + + else /* 8 bit colors */ + { + png_uint_32 r = random_32(); + + background.red = (png_byte)r; + background.green = (png_byte)(r >> 8); + background.blue = (png_byte)(r >> 16); + background.gray = (png_byte)(r >> 24); + } + + background.index = 193; /* rgb(193,193,193) to detect errors */ + if (!(colour_type & PNG_COLOR_MASK_COLOR)) + { + /* Grayscale input, we do not convert to RGB (TBD), so we must set the + * background to gray - else libpng seems to fail. + */ + background.red = background.green = background.blue = background.gray; + } + + pos = safecat(name, sizeof name, pos, "gamma "); + pos = safecatd(name, sizeof name, pos, file_gamma, 3); + pos = safecat(name, sizeof name, pos, "->"); + pos = safecatd(name, sizeof name, pos, screen_gamma, 3); + + pos = safecat(name, sizeof name, pos, base); + if (do_background < ALPHA_MODE_OFFSET) + { + /* Include the background color and gamma in the name: */ + pos = safecat(name, sizeof name, pos, "("); + /* This assumes no expand gray->rgb - the current code won't handle that! + */ + if (colour_type & PNG_COLOR_MASK_COLOR) + { + pos = safecatn(name, sizeof name, pos, background.red); + pos = safecat(name, sizeof name, pos, ","); + pos = safecatn(name, sizeof name, pos, background.green); + pos = safecat(name, sizeof name, pos, ","); + pos = safecatn(name, sizeof name, pos, background.blue); + } + else + pos = safecatn(name, sizeof name, pos, background.gray); + pos = safecat(name, sizeof name, pos, ")^"); + pos = safecatd(name, sizeof name, pos, bg, 3); + } + + gamma_test(pm, colour_type, bit_depth, palette_number, interlace_type, + file_gamma, screen_gamma, 0/*sBIT*/, 0, name, use_input_precision, + 0/*strip 16*/, expand_16, do_background, &background, bg); +} + + +static void +perform_gamma_composition_tests(png_modifier *pm, int do_background, + int expand_16) +{ + png_byte colour_type = 0; + png_byte bit_depth = 0; + int palette_number = 0; + + /* Skip the non-alpha cases - there is no setting of a transparency colour at + * present. + */ + while (next_format(&colour_type, &bit_depth, &palette_number)) + if ((colour_type & PNG_COLOR_MASK_ALPHA) != 0) + { + unsigned int i, j; + + /* Don't skip the i==j case here - it's relevant. */ + for (i=0; ingamma_tests; ++i) for (j=0; jngamma_tests; ++j) + { + gamma_composition_test(pm, colour_type, bit_depth, palette_number, + pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], + pm->use_input_precision, do_background, expand_16); + + if (fail(pm)) + return; + } + } +} +#endif /* READ_BACKGROUND || READ_ALPHA_MODE */ + +static void +init_gamma_errors(png_modifier *pm) +{ + pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = 0; + pm->error_color_8 = 0; + pm->error_indexed = 0; + pm->error_gray_16 = pm->error_color_16 = 0; +} + +static void +summarize_gamma_errors(png_modifier *pm, png_const_charp who, int low_bit_depth) +{ + if (who) + printf("Gamma correction with %s:\n", who); + + if (low_bit_depth) + { + printf(" 2 bit gray: %.5f\n", pm->error_gray_2); + printf(" 4 bit gray: %.5f\n", pm->error_gray_4); + printf(" 8 bit gray: %.5f\n", pm->error_gray_8); + printf(" 8 bit color: %.5f\n", pm->error_color_8); + printf(" indexed: %.5f\n", pm->error_indexed); + } + +#ifdef DO_16BIT + printf(" 16 bit gray: %.5f\n", pm->error_gray_16); + printf(" 16 bit color: %.5f\n", pm->error_color_16); +#endif +} + +static void +perform_gamma_test(png_modifier *pm, int summary) +{ + /*TODO: remove this*/ + /* Save certain values for the temporary overrides below. */ + unsigned int calculations_use_input_precision = + pm->calculations_use_input_precision; + double maxout8 = pm->maxout8; + + /* First some arbitrary no-transform tests: */ + if (!pm->this.speed && pm->test_gamma_threshold) + { + perform_gamma_threshold_tests(pm); + + if (fail(pm)) + return; + } + + /* Now some real transforms. */ + if (pm->test_gamma_transform) + { + init_gamma_errors(pm); + /*TODO: remove this. Necessary because the current libpng + * implementation works in 8 bits: + */ + if (pm->test_gamma_expand16) + pm->calculations_use_input_precision = 1; + perform_gamma_transform_tests(pm); + if (!calculations_use_input_precision) + pm->calculations_use_input_precision = 0; + + if (summary) + { + printf("Gamma correction error summary\n\n"); + printf("The printed value is the maximum error in the pixel values\n"); + printf("calculated by the libpng gamma correction code. The error\n"); + printf("is calculated as the difference between the output pixel\n"); + printf("value (always an integer) and the ideal value from the\n"); + printf("libpng specification (typically not an integer).\n\n"); + + printf("Expect this value to be less than .5 for 8 bit formats,\n"); + printf("less than 1 for formats with fewer than 8 bits and a small\n"); + printf("number (typically less than 5) for the 16 bit formats.\n"); + printf("For performance reasons the value for 16 bit formats\n"); + printf("increases when the image file includes an sBIT chunk.\n\n"); + + summarize_gamma_errors(pm, 0/*who*/, 1); + } + } + + /* The sbit tests produce much larger errors: */ + if (pm->test_gamma_sbit) + { + init_gamma_errors(pm); + perform_gamma_sbit_tests(pm); + + if (summary) + summarize_gamma_errors(pm, "sBIT", pm->sbitlow < 8U); + } + +#ifdef DO_16BIT /* Should be READ_16BIT_SUPPORTED */ + if (pm->test_gamma_scale16) + { + /* The 16 to 8 bit strip operations: */ + init_gamma_errors(pm); + perform_gamma_scale16_tests(pm); + + if (summary) + { + printf("Gamma correction with 16 to 8 bit reduction:\n"); + printf(" 16 bit gray: %.5f\n", pm->error_gray_16); + printf(" 16 bit color: %.5f\n", pm->error_color_16); + } + } +#endif + +#ifdef PNG_READ_BACKGROUND_SUPPORTED + if (pm->test_gamma_background) + { + init_gamma_errors(pm); + + /*TODO: remove this. Necessary because the current libpng + * implementation works in 8 bits: + */ + if (pm->test_gamma_expand16) + { + pm->calculations_use_input_precision = 1; + pm->maxout8 = .499; /* because the 16 bit background is smashed */ + } + perform_gamma_composition_tests(pm, PNG_BACKGROUND_GAMMA_UNIQUE, + pm->test_gamma_expand16); + if (!calculations_use_input_precision) + pm->calculations_use_input_precision = 0; + pm->maxout8 = maxout8; + + if (summary) + summarize_gamma_errors(pm, "background", 1); + } +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + if (pm->test_gamma_alpha_mode) + { + int do_background; + + init_gamma_errors(pm); + + /*TODO: remove this. Necessary because the current libpng + * implementation works in 8 bits: + */ + if (pm->test_gamma_expand16) + pm->calculations_use_input_precision = 1; + for (do_background = ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD; + do_background <= ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN && !fail(pm); + ++do_background) + perform_gamma_composition_tests(pm, do_background, + pm->test_gamma_expand16); + if (!calculations_use_input_precision) + pm->calculations_use_input_precision = 0; + + if (summary) + summarize_gamma_errors(pm, "alpha mode", 1); + } +#endif +} +#endif /* PNG_READ_GAMMA_SUPPORTED */ + +/* INTERLACE MACRO VALIDATION */ +/* This is copied verbatim from the specification, it is simply the pass + * number in which each pixel in each 8x8 tile appears. The array must + * be indexed adam7[y][x] and notice that the pass numbers are based at + * 1, not 0 - the base libpng uses. + */ +static PNG_CONST +png_byte adam7[8][8] = +{ + { 1,6,4,6,2,6,4,6 }, + { 7,7,7,7,7,7,7,7 }, + { 5,6,5,6,5,6,5,6 }, + { 7,7,7,7,7,7,7,7 }, + { 3,6,4,6,3,6,4,6 }, + { 7,7,7,7,7,7,7,7 }, + { 5,6,5,6,5,6,5,6 }, + { 7,7,7,7,7,7,7,7 } +}; + +/* This routine validates all the interlace support macros in png.h for + * a variety of valid PNG widths and heights. It uses a number of similarly + * named internal routines that feed off the above array. + */ +static png_uint_32 +png_pass_start_row(int pass) +{ + int x, y; + ++pass; + for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) + return y; + return 0xf; +} + +static png_uint_32 +png_pass_start_col(int pass) +{ + int x, y; + ++pass; + for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) + return x; + return 0xf; +} + +static int +png_pass_row_shift(int pass) +{ + int x, y, base=(-1), inc=8; + ++pass; + for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) + { + if (base == (-1)) + base = y; + else if (base == y) + {} + else if (inc == y-base) + base=y; + else if (inc == 8) + inc = y-base, base=y; + else if (inc != y-base) + return 0xff; /* error - more than one 'inc' value! */ + } + + if (base == (-1)) return 0xfe; /* error - no row in pass! */ + + /* The shift is always 1, 2 or 3 - no pass has all the rows! */ + switch (inc) + { +case 2: return 1; +case 4: return 2; +case 8: return 3; +default: break; + } + + /* error - unrecognized 'inc' */ + return (inc << 8) + 0xfd; +} + +static int +png_pass_col_shift(int pass) +{ + int x, y, base=(-1), inc=8; + ++pass; + for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) + { + if (base == (-1)) + base = x; + else if (base == x) + {} + else if (inc == x-base) + base=x; + else if (inc == 8) + inc = x-base, base=x; + else if (inc != x-base) + return 0xff; /* error - more than one 'inc' value! */ + } + + if (base == (-1)) return 0xfe; /* error - no row in pass! */ + + /* The shift is always 1, 2 or 3 - no pass has all the rows! */ + switch (inc) + { +case 1: return 0; /* pass 7 has all the columns */ +case 2: return 1; +case 4: return 2; +case 8: return 3; +default: break; + } + + /* error - unrecognized 'inc' */ + return (inc << 8) + 0xfd; +} + +static png_uint_32 +png_row_from_pass_row(png_uint_32 yIn, int pass) +{ + /* By examination of the array: */ + switch (pass) + { +case 0: return yIn * 8; +case 1: return yIn * 8; +case 2: return yIn * 8 + 4; +case 3: return yIn * 4; +case 4: return yIn * 4 + 2; +case 5: return yIn * 2; +case 6: return yIn * 2 + 1; +default: break; + } + + return 0xff; /* bad pass number */ +} + +static png_uint_32 +png_col_from_pass_col(png_uint_32 xIn, int pass) +{ + /* By examination of the array: */ + switch (pass) + { +case 0: return xIn * 8; +case 1: return xIn * 8 + 4; +case 2: return xIn * 4; +case 3: return xIn * 4 + 2; +case 4: return xIn * 2; +case 5: return xIn * 2 + 1; +case 6: return xIn; +default: break; + } + + return 0xff; /* bad pass number */ +} + +static int +png_row_in_interlace_pass(png_uint_32 y, int pass) +{ + /* Is row 'y' in pass 'pass'? */ + int x; + y &= 7; + ++pass; + for (x=0; x<8; ++x) if (adam7[y][x] == pass) + return 1; + + return 0; +} + +static int +png_col_in_interlace_pass(png_uint_32 x, int pass) +{ + /* Is column 'x' in pass 'pass'? */ + int y; + x &= 7; + ++pass; + for (y=0; y<8; ++y) if (adam7[y][x] == pass) + return 1; + + return 0; +} + +static png_uint_32 +png_pass_rows(png_uint_32 height, int pass) +{ + png_uint_32 tiles = height>>3; + png_uint_32 rows = 0; + unsigned int x, y; + + height &= 7; + ++pass; + for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) + { + rows += tiles; + if (y < height) ++rows; + break; /* i.e. break the 'x', column, loop. */ + } + + return rows; +} + +static png_uint_32 +png_pass_cols(png_uint_32 width, int pass) +{ + png_uint_32 tiles = width>>3; + png_uint_32 cols = 0; + unsigned int x, y; + + width &= 7; + ++pass; + for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) + { + cols += tiles; + if (x < width) ++cols; + break; /* i.e. break the 'y', row, loop. */ + } + + return cols; +} + +static void +perform_interlace_macro_validation(void) +{ + /* The macros to validate, first those that depend only on pass: + * + * PNG_PASS_START_ROW(pass) + * PNG_PASS_START_COL(pass) + * PNG_PASS_ROW_SHIFT(pass) + * PNG_PASS_COL_SHIFT(pass) + */ + int pass; + + for (pass=0; pass<7; ++pass) + { + png_uint_32 m, f, v; + + m = PNG_PASS_START_ROW(pass); + f = png_pass_start_row(pass); + if (m != f) + { + fprintf(stderr, "PNG_PASS_START_ROW(%d) = %u != %x\n", pass, m, f); + exit(1); + } + + m = PNG_PASS_START_COL(pass); + f = png_pass_start_col(pass); + if (m != f) + { + fprintf(stderr, "PNG_PASS_START_COL(%d) = %u != %x\n", pass, m, f); + exit(1); + } + + m = PNG_PASS_ROW_SHIFT(pass); + f = png_pass_row_shift(pass); + if (m != f) + { + fprintf(stderr, "PNG_PASS_ROW_SHIFT(%d) = %u != %x\n", pass, m, f); + exit(1); + } + + m = PNG_PASS_COL_SHIFT(pass); + f = png_pass_col_shift(pass); + if (m != f) + { + fprintf(stderr, "PNG_PASS_COL_SHIFT(%d) = %u != %x\n", pass, m, f); + exit(1); + } + + /* Macros that depend on the image or sub-image height too: + * + * PNG_PASS_ROWS(height, pass) + * PNG_PASS_COLS(width, pass) + * PNG_ROW_FROM_PASS_ROW(yIn, pass) + * PNG_COL_FROM_PASS_COL(xIn, pass) + * PNG_ROW_IN_INTERLACE_PASS(y, pass) + * PNG_COL_IN_INTERLACE_PASS(x, pass) + */ + for (v=0;;) + { + /* First the base 0 stuff: */ + m = PNG_ROW_FROM_PASS_ROW(v, pass); + f = png_row_from_pass_row(v, pass); + if (m != f) + { + fprintf(stderr, "PNG_ROW_FROM_PASS_ROW(%u, %d) = %u != %x\n", + v, pass, m, f); + exit(1); + } + + m = PNG_COL_FROM_PASS_COL(v, pass); + f = png_col_from_pass_col(v, pass); + if (m != f) + { + fprintf(stderr, "PNG_COL_FROM_PASS_COL(%u, %d) = %u != %x\n", + v, pass, m, f); + exit(1); + } + + m = PNG_ROW_IN_INTERLACE_PASS(v, pass); + f = png_row_in_interlace_pass(v, pass); + if (m != f) + { + fprintf(stderr, "PNG_ROW_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", + v, pass, m, f); + exit(1); + } + + m = PNG_COL_IN_INTERLACE_PASS(v, pass); + f = png_col_in_interlace_pass(v, pass); + if (m != f) + { + fprintf(stderr, "PNG_COL_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", + v, pass, m, f); + exit(1); + } + + /* Then the base 1 stuff: */ + ++v; + m = PNG_PASS_ROWS(v, pass); + f = png_pass_rows(v, pass); + if (m != f) + { + fprintf(stderr, "PNG_PASS_ROWS(%u, %d) = %u != %x\n", + v, pass, m, f); + exit(1); + } + + m = PNG_PASS_COLS(v, pass); + f = png_pass_cols(v, pass); + if (m != f) + { + fprintf(stderr, "PNG_PASS_COLS(%u, %d) = %u != %x\n", + v, pass, m, f); + exit(1); + } + + /* Move to the next v - the stepping algorithm starts skipping + * values above 1024. + */ + if (v > 1024) + { + if (v == PNG_UINT_31_MAX) + break; + + v = (v << 1) ^ v; + if (v >= PNG_UINT_31_MAX) + v = PNG_UINT_31_MAX-1; + } + } + } +} + +/* Test color encodings. These values are back-calculated from the published + * chromaticities. The values are accurate to about 14 decimal places; 15 are + * given. These values are much more accurate than the ones given in the spec, + * which typically don't exceed 4 decimal places. This allows testing of the + * libpng code to its theoretical accuracy of 4 decimal places. (If pngvalid + * used the published errors the 'slack' permitted would have to be +/-.5E-4 or + * more.) + * + * The png_modifier code assumes that encodings[0] is sRGB and treats it + * specially: do not change the first entry in this list! + */ +static PNG_CONST color_encoding test_encodings[] = +{ +/* sRGB: must be first in this list! */ +/*gamma:*/ { 1/2.2, +/*red: */ { 0.412390799265959, 0.212639005871510, 0.019330818715592 }, +/*green:*/ { 0.357584339383878, 0.715168678767756, 0.119194779794626 }, +/*blue: */ { 0.180480788401834, 0.072192315360734, 0.950532152249660} }, +/* Kodak ProPhoto (wide gamut) */ +/*gamma:*/ { 1/1.6 /*approximate: uses 1.8 power law compared to sRGB 2.4*/, +/*red: */ { 0.797760489672303, 0.288071128229293, 0.000000000000000 }, +/*green:*/ { 0.135185837175740, 0.711843217810102, 0.000000000000000 }, +/*blue: */ { 0.031349349581525, 0.000085653960605, 0.825104602510460} }, +/* Adobe RGB (1998) */ +/*gamma:*/ { 1/(2+51./256), +/*red: */ { 0.576669042910131, 0.297344975250536, 0.027031361386412 }, +/*green:*/ { 0.185558237906546, 0.627363566255466, 0.070688852535827 }, +/*blue: */ { 0.188228646234995, 0.075291458493998, 0.991337536837639} }, +/* Adobe Wide Gamut RGB */ +/*gamma:*/ { 1/(2+51./256), +/*red: */ { 0.716500716779386, 0.258728243040113, 0.000000000000000 }, +/*green:*/ { 0.101020574397477, 0.724682314948566, 0.051211818965388 }, +/*blue: */ { 0.146774385252705, 0.016589442011321, 0.773892783545073} }, +}; + +/* main program */ +int main(int argc, PNG_CONST char **argv) +{ + volatile int summary = 1; /* Print the error summary at the end */ + volatile int memstats = 0; /* Print memory statistics at the end */ + + /* Create the given output file on success: */ + PNG_CONST char *volatile touch = NULL; + + /* This is an array of standard gamma values (believe it or not I've seen + * every one of these mentioned somewhere.) + * + * In the following list the most useful values are first! + */ + static double + gammas[]={2.2, 1.0, 2.2/1.45, 1.8, 1.5, 2.4, 2.5, 2.62, 2.9}; + + /* This records the command and arguments: */ + size_t cp = 0; + char command[1024]; + + png_modifier pm; + context(&pm.this, fault); + + modifier_init(&pm); + + /* Preallocate the image buffer, because we know how big it needs to be, + * note that, for testing purposes, it is deliberately mis-aligned by tag + * bytes either side. All rows have an additional five bytes of padding for + * overwrite checking. + */ + store_ensure_image(&pm.this, NULL, 2, TRANSFORM_ROWMAX, TRANSFORM_HEIGHTMAX); + + /* Don't give argv[0], it's normally some horrible libtool string: */ + cp = safecat(command, sizeof command, cp, "pngvalid"); + + /* Default to error on warning: */ + pm.this.treat_warnings_as_errors = 1; + + /* Store the test gammas */ + pm.gammas = gammas; + pm.ngammas = (sizeof gammas) / (sizeof gammas[0]); + pm.ngamma_tests = 0; /* default to off */ + + /* And the test encodings */ + pm.encodings = test_encodings; + pm.nencodings = (sizeof test_encodings) / (sizeof test_encodings[0]); + + pm.sbitlow = 8U; /* because libpng doesn't do sBIT below 8! */ + /* The following allows results to pass if they correspond to anything in the + * transformed range [input-.5,input+.5]; this is is required because of the + * way libpng treates the 16_TO_8 flag when building the gamma tables. + * + * TODO: review this + */ + pm.use_input_precision_16to8 = 1U; + + /* Some default values (set the behavior for 'make check' here). + * These values simply control the maximum error permitted in the gamma + * transformations. The practial limits for human perception are described + * below (the setting for maxpc16), however for 8 bit encodings it isn't + * possible to meet the accepted capabilities of human vision - i.e. 8 bit + * images can never be good enough, regardless of encoding. + */ + pm.maxout8 = .1; /* Arithmetic error in *encoded* value */ + pm.maxabs8 = .00005; /* 1/20000 */ + pm.maxcalc8 = .004; /* +/-1 in 8 bits for compose errors */ + pm.maxpc8 = .499; /* I.e., .499% fractional error */ + pm.maxout16 = .499; /* Error in *encoded* value */ + pm.maxabs16 = .00005;/* 1/20000 */ + pm.maxcalc16 =.000015;/* +/-1 in 16 bits for compose errors */ + + /* NOTE: this is a reasonable perceptual limit. We assume that humans can + * perceive light level differences of 1% over a 100:1 range, so we need to + * maintain 1 in 10000 accuracy (in linear light space), which is what the + * following guarantees. It also allows significantly higher errors at + * higher 16 bit values, which is important for performance. The actual + * maximum 16 bit error is about +/-1.9 in the fixed point implementation but + * this is only allowed for values >38149 by the following: + */ + pm.maxpc16 = .005; /* I.e., 1/200% - 1/20000 */ + + /* Now parse the command line options. */ + while (--argc >= 1) + { + int catmore = 0; /* Set if the argument has an argument. */ + + /* Record each argument for posterity: */ + cp = safecat(command, sizeof command, cp, " "); + cp = safecat(command, sizeof command, cp, *++argv); + + if (strcmp(*argv, "-v") == 0) + pm.this.verbose = 1; + + else if (strcmp(*argv, "-l") == 0) + pm.log = 1; + + else if (strcmp(*argv, "-q") == 0) + summary = pm.this.verbose = pm.log = 0; + + else if (strcmp(*argv, "-w") == 0) + pm.this.treat_warnings_as_errors = 0; + + else if (strcmp(*argv, "--speed") == 0) + pm.this.speed = 1, pm.ngamma_tests = pm.ngammas, pm.test_standard = 0, + summary = 0; + + else if (strcmp(*argv, "--memory") == 0) + memstats = 1; + + else if (strcmp(*argv, "--size") == 0) + pm.test_size = 1; + + else if (strcmp(*argv, "--nosize") == 0) + pm.test_size = 0; + + else if (strcmp(*argv, "--standard") == 0) + pm.test_standard = 1; + + else if (strcmp(*argv, "--nostandard") == 0) + pm.test_standard = 0; + + else if (strcmp(*argv, "--transform") == 0) + pm.test_transform = 1; + + else if (strcmp(*argv, "--notransform") == 0) + pm.test_transform = 0; + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED + else if (strncmp(*argv, "--transform-disable=", + sizeof "--transform-disable") == 0) + { + pm.test_transform = 1; + transform_disable(*argv + sizeof "--transform-disable"); + } + + else if (strncmp(*argv, "--transform-enable=", + sizeof "--transform-enable") == 0) + { + pm.test_transform = 1; + transform_enable(*argv + sizeof "--transform-enable"); + } +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ + + else if (strcmp(*argv, "--gamma") == 0) + { + /* Just do two gamma tests here (2.2 and linear) for speed: */ + pm.ngamma_tests = 2U; + pm.test_gamma_threshold = 1; + pm.test_gamma_transform = 1; + pm.test_gamma_sbit = 1; + pm.test_gamma_scale16 = 1; + pm.test_gamma_background = 1; + pm.test_gamma_alpha_mode = 1; + } + + else if (strcmp(*argv, "--nogamma") == 0) + pm.ngamma_tests = 0; + + else if (strcmp(*argv, "--gamma-threshold") == 0) + pm.ngamma_tests = 2U, pm.test_gamma_threshold = 1; + + else if (strcmp(*argv, "--nogamma-threshold") == 0) + pm.test_gamma_threshold = 0; + + else if (strcmp(*argv, "--gamma-transform") == 0) + pm.ngamma_tests = 2U, pm.test_gamma_transform = 1; + + else if (strcmp(*argv, "--nogamma-transform") == 0) + pm.test_gamma_transform = 0; + + else if (strcmp(*argv, "--gamma-sbit") == 0) + pm.ngamma_tests = 2U, pm.test_gamma_sbit = 1; + + else if (strcmp(*argv, "--nogamma-sbit") == 0) + pm.test_gamma_sbit = 0; + + else if (strcmp(*argv, "--gamma-16-to-8") == 0) + pm.ngamma_tests = 2U, pm.test_gamma_scale16 = 1; + + else if (strcmp(*argv, "--nogamma-16-to-8") == 0) + pm.test_gamma_scale16 = 0; + + else if (strcmp(*argv, "--gamma-background") == 0) + pm.ngamma_tests = 2U, pm.test_gamma_background = 1; + + else if (strcmp(*argv, "--nogamma-background") == 0) + pm.test_gamma_background = 0; + + else if (strcmp(*argv, "--gamma-alpha-mode") == 0) + pm.ngamma_tests = 2U, pm.test_gamma_alpha_mode = 1; + + else if (strcmp(*argv, "--nogamma-alpha-mode") == 0) + pm.test_gamma_alpha_mode = 0; + + else if (strcmp(*argv, "--expand16") == 0) + pm.test_gamma_expand16 = 1; + + else if (strcmp(*argv, "--noexpand16") == 0) + pm.test_gamma_expand16 = 0; + + else if (strcmp(*argv, "--more-gammas") == 0) + pm.ngamma_tests = 3U; + + else if (strcmp(*argv, "--all-gammas") == 0) + pm.ngamma_tests = pm.ngammas; + + else if (strcmp(*argv, "--progressive-read") == 0) + pm.this.progressive = 1; + + else if (strcmp(*argv, "--use-update-info") == 0) + ++pm.use_update_info; /* Can call multiple times */ + + else if (strcmp(*argv, "--interlace") == 0) + pm.interlace_type = PNG_INTERLACE_ADAM7; + + else if (strcmp(*argv, "--use-input-precision") == 0) + pm.use_input_precision = 1; + + else if (strcmp(*argv, "--calculations-use-input-precision") == 0) + pm.calculations_use_input_precision = 1; + + else if (strcmp(*argv, "--assume-16-bit-calculations") == 0) + pm.assume_16_bit_calculations = 1; + + else if (strcmp(*argv, "--calculations-follow-bit-depth") == 0) + pm.calculations_use_input_precision = + pm.assume_16_bit_calculations = 0; + + else if (strcmp(*argv, "--exhaustive") == 0) + pm.test_exhaustive = 1; + + else if (argc > 1 && strcmp(*argv, "--sbitlow") == 0) + --argc, pm.sbitlow = (png_byte)atoi(*++argv), catmore = 1; + + else if (argc > 1 && strcmp(*argv, "--touch") == 0) + --argc, touch = *++argv, catmore = 1; + + else if (argc > 1 && strncmp(*argv, "--max", 5) == 0) + { + --argc; + + if (strcmp(5+*argv, "abs8") == 0) + pm.maxabs8 = atof(*++argv); + + else if (strcmp(5+*argv, "abs16") == 0) + pm.maxabs16 = atof(*++argv); + + else if (strcmp(5+*argv, "calc8") == 0) + pm.maxcalc8 = atof(*++argv); + + else if (strcmp(5+*argv, "calc16") == 0) + pm.maxcalc16 = atof(*++argv); + + else if (strcmp(5+*argv, "out8") == 0) + pm.maxout8 = atof(*++argv); + + else if (strcmp(5+*argv, "out16") == 0) + pm.maxout16 = atof(*++argv); + + else if (strcmp(5+*argv, "pc8") == 0) + pm.maxpc8 = atof(*++argv); + + else if (strcmp(5+*argv, "pc16") == 0) + pm.maxpc16 = atof(*++argv); + + else + { + fprintf(stderr, "pngvalid: %s: unknown 'max' option\n", *argv); + exit(1); + } + + catmore = 1; + } + + else if (strcmp(*argv, "--log8") == 0) + --argc, pm.log8 = atof(*++argv), catmore = 1; + + else if (strcmp(*argv, "--log16") == 0) + --argc, pm.log16 = atof(*++argv), catmore = 1; + + else + { + fprintf(stderr, "pngvalid: %s: unknown argument\n", *argv); + exit(1); + } + + if (catmore) /* consumed an extra *argv */ + { + cp = safecat(command, sizeof command, cp, " "); + cp = safecat(command, sizeof command, cp, *argv); + } + } + + /* If pngvalid is run with no arguments default to a reasonable set of the + * tests. + */ + if (pm.test_standard == 0 && pm.test_size == 0 && pm.test_transform == 0 && + pm.ngamma_tests == 0) + { + /* Make this do all the tests done in the test shell scripts with the same + * parameters, where possible. The limitation is that all the progressive + * read and interlace stuff has to be done in separate runs, so only the + * basic 'standard' and 'size' tests are done. + */ + pm.test_standard = 1; + pm.test_size = 1; + pm.test_transform = 1; + pm.ngamma_tests = 2U; + } + + if (pm.ngamma_tests > 0 && + pm.test_gamma_threshold == 0 && pm.test_gamma_transform == 0 && + pm.test_gamma_sbit == 0 && pm.test_gamma_scale16 == 0 && + pm.test_gamma_background == 0 && pm.test_gamma_alpha_mode == 0) + { + pm.test_gamma_threshold = 1; + pm.test_gamma_transform = 1; + pm.test_gamma_sbit = 1; + pm.test_gamma_scale16 = 1; + pm.test_gamma_background = 1; + pm.test_gamma_alpha_mode = 1; + } + + else if (pm.ngamma_tests == 0) + { + /* Nothing to test so turn everything off: */ + pm.test_gamma_threshold = 0; + pm.test_gamma_transform = 0; + pm.test_gamma_sbit = 0; + pm.test_gamma_scale16 = 0; + pm.test_gamma_background = 0; + pm.test_gamma_alpha_mode = 0; + } + + Try + { + /* Make useful base images */ + make_transform_images(&pm.this); + + /* Perform the standard and gamma tests. */ + if (pm.test_standard) + { + perform_interlace_macro_validation(); + perform_formatting_test(&pm.this); + perform_standard_test(&pm); + perform_error_test(&pm); + } + + /* Various oddly sized images: */ + if (pm.test_size) + { + make_size_images(&pm.this); + perform_size_test(&pm); + } + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED + /* Combinatorial transforms: */ + if (pm.test_transform) + perform_transform_test(&pm); +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ + +#ifdef PNG_READ_GAMMA_SUPPORTED + if (pm.ngamma_tests > 0) + perform_gamma_test(&pm, summary); +#endif + } + + Catch(fault) + { + fprintf(stderr, "pngvalid: test aborted (probably failed in cleanup)\n"); + if (!pm.this.verbose) + { + if (pm.this.error[0] != 0) + fprintf(stderr, "pngvalid: first error: %s\n", pm.this.error); + + fprintf(stderr, "pngvalid: run with -v to see what happened\n"); + } + exit(1); + } + + if (summary) + { + printf("%s: %s (%s point arithmetic)\n", + (pm.this.nerrors || (pm.this.treat_warnings_as_errors && + pm.this.nwarnings)) ? "FAIL" : "PASS", + command, +#if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || PNG_LIBPNG_VER < 10500 + "floating" +#else + "fixed" +#endif + ); + } + + if (memstats) + { + printf("Allocated memory statistics (in bytes):\n" + "\tread %lu maximum single, %lu peak, %lu total\n" + "\twrite %lu maximum single, %lu peak, %lu total\n", + (unsigned long)pm.this.read_memory_pool.max_max, + (unsigned long)pm.this.read_memory_pool.max_limit, + (unsigned long)pm.this.read_memory_pool.max_total, + (unsigned long)pm.this.write_memory_pool.max_max, + (unsigned long)pm.this.write_memory_pool.max_limit, + (unsigned long)pm.this.write_memory_pool.max_total); + } + + /* Do this here to provoke memory corruption errors in memory not directly + * allocated by libpng - not a complete test, but better than nothing. + */ + store_delete(&pm.this); + + /* Error exit if there are any errors, and maybe if there are any + * warnings. + */ + if (pm.this.nerrors || (pm.this.treat_warnings_as_errors && + pm.this.nwarnings)) + { + if (!pm.this.verbose) + fprintf(stderr, "pngvalid: %s\n", pm.this.error); + + fprintf(stderr, "pngvalid: %d errors, %d warnings\n", pm.this.nerrors, + pm.this.nwarnings); + + exit(1); + } + + /* Success case. */ + if (touch != NULL) + { + FILE *fsuccess = fopen(touch, "wt"); + + if (fsuccess != NULL) + { + int error = 0; + fprintf(fsuccess, "PNG validation succeeded\n"); + fflush(fsuccess); + error = ferror(fsuccess); + + if (fclose(fsuccess) || error) + { + fprintf(stderr, "%s: write failed\n", touch); + exit(1); + } + } + } + + return 0; +} diff --git a/src/png/pngwio.c b/src/png/pngwio.c index 513a71a062..95ffb3429f 100644 --- a/src/png/pngwio.c +++ b/src/png/pngwio.c @@ -1,8 +1,8 @@ /* pngwio.c - functions for data output * - * Last changed in libpng 1.4.0 [January 3, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.0 [January 6, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -18,11 +18,10 @@ * them at run time with png_set_write_fn(...). */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_WRITE_SUPPORTED #include "pngpriv.h" +#ifdef PNG_WRITE_SUPPORTED + /* Write the data to whatever output you are using. The default routine * writes to a file pointer. Note that this routine sometimes gets called * with very small lengths, so you should implement some kind of simple @@ -31,10 +30,12 @@ */ void /* PRIVATE */ -png_write_data(png_structp png_ptr, png_bytep data, png_size_t length) +png_write_data(png_structp png_ptr, png_const_bytep data, png_size_t length) { + /* NOTE: write_data_fn must not change the buffer! */ if (png_ptr->write_data_fn != NULL ) - (*(png_ptr->write_data_fn))(png_ptr, data, length); + (*(png_ptr->write_data_fn))(png_ptr, (png_bytep)data, length); + else png_error(png_ptr, "Call to NULL write function"); } @@ -46,14 +47,16 @@ png_write_data(png_structp png_ptr, png_bytep data, png_size_t length) * than changing the library. */ #ifndef USE_FAR_KEYWORD -void PNGAPI +void PNGCBAPI png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { - png_uint_32 check; + png_size_t check; if (png_ptr == NULL) return; + check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr)); + if (check != length) png_error(png_ptr, "Write Error"); } @@ -66,7 +69,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) #define NEAR_BUF_SIZE 1024 #define MIN(a,b) (a <= b ? a : b) -void PNGAPI +void PNGCBAPI png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_uint_32 check; @@ -75,24 +78,29 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) if (png_ptr == NULL) return; + /* Check if data really is near. If so, use usual code. */ near_data = (png_byte *)CVT_PTR_NOCHECK(data); io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); + if ((png_bytep)near_data == data) { check = fwrite(near_data, 1, length, io_ptr); } + else { png_byte buf[NEAR_BUF_SIZE]; png_size_t written, remaining, err; check = 0; remaining = length; + do { written = MIN(NEAR_BUF_SIZE, remaining); png_memcpy(buf, data, written); /* Copy far buffer to near buffer */ err = fwrite(buf, 1, written, io_ptr); + if (err != written) break; @@ -104,6 +112,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) } while (remaining != 0); } + if (check != length) png_error(png_ptr, "Write Error"); } @@ -123,17 +132,19 @@ png_flush(png_structp png_ptr) (*(png_ptr->output_flush_fn))(png_ptr); } -#ifdef PNG_STDIO_SUPPORTED -void PNGAPI +# ifdef PNG_STDIO_SUPPORTED +void PNGCBAPI png_default_flush(png_structp png_ptr) { png_FILE_p io_ptr; + if (png_ptr == NULL) return; + io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr)); fflush(io_ptr); } -#endif +# endif #endif /* This function allows the application to supply new output functions for @@ -167,7 +178,7 @@ png_default_flush(png_structp png_ptr) */ void PNGAPI png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, - png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn) + png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn) { if (png_ptr == NULL) return; @@ -185,30 +196,32 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, #endif #ifdef PNG_WRITE_FLUSH_SUPPORTED -#ifdef PNG_STDIO_SUPPORTED +# ifdef PNG_STDIO_SUPPORTED + if (output_flush_fn != NULL) png_ptr->output_flush_fn = output_flush_fn; else png_ptr->output_flush_fn = png_default_flush; -#else + +# else png_ptr->output_flush_fn = output_flush_fn; -#endif +# endif #endif /* PNG_WRITE_FLUSH_SUPPORTED */ /* It is an error to read while writing a png file */ if (png_ptr->read_data_fn != NULL) { png_ptr->read_data_fn = NULL; + png_warning(png_ptr, - "Attempted to set both read_data_fn and write_data_fn in"); - png_warning(png_ptr, - "the same structure. Resetting read_data_fn to NULL"); + "Can't set both read_data_fn and write_data_fn in the" + " same structure"); } } #ifdef USE_FAR_KEYWORD -#ifdef _MSC_VER +# ifdef _MSC_VER void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check) { void *near_ptr; @@ -236,6 +249,6 @@ void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check) return(near_ptr); } -# endif -# endif +# endif +#endif #endif /* PNG_WRITE_SUPPORTED */ diff --git a/src/png/pngwrite.c b/src/png/pngwrite.c index 0252051989..107aa34438 100644 --- a/src/png/pngwrite.c +++ b/src/png/pngwrite.c @@ -1,8 +1,8 @@ /* pngwrite.c - general routines to write a PNG file * - * Last changed in libpng 1.4.0 [January 3, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -11,12 +11,10 @@ * and license in png.h */ -/* Get internal access to png.h */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_WRITE_SUPPORTED #include "pngpriv.h" +#ifdef PNG_WRITE_SUPPORTED + /* Writes all the PNG information. This is the suggested way to use the * library. If you have a new chunk to add, make a function to write it, * and put it in the correct location here. If you want the chunk written @@ -33,50 +31,46 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) if (png_ptr == NULL || info_ptr == NULL) return; + if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) { /* Write PNG signature */ png_write_sig(png_ptr); + #ifdef PNG_MNG_FEATURES_SUPPORTED if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \ - (png_ptr->mng_features_permitted)) + (png_ptr->mng_features_permitted)) { png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); png_ptr->mng_features_permitted = 0; } #endif + /* Write IHDR information. */ png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height, - info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type, - info_ptr->filter_type, + info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type, + info_ptr->filter_type, #ifdef PNG_WRITE_INTERLACING_SUPPORTED - info_ptr->interlace_type); + info_ptr->interlace_type); #else - 0); + 0); #endif /* The rest of these check to see if the valid field has the appropriate * flag set, and if it does, writes the chunk. */ #ifdef PNG_WRITE_gAMA_SUPPORTED if (info_ptr->valid & PNG_INFO_gAMA) - { -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_write_gAMA(png_ptr, info_ptr->gamma); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - png_write_gAMA_fixed(png_ptr, info_ptr->int_gamma); -# endif -#endif - } + png_write_gAMA_fixed(png_ptr, info_ptr->gamma); #endif #ifdef PNG_WRITE_sRGB_SUPPORTED if (info_ptr->valid & PNG_INFO_sRGB) png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent); #endif + #ifdef PNG_WRITE_iCCP_SUPPORTED if (info_ptr->valid & PNG_INFO_iCCP) png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE, - info_ptr->iccp_profile, (int)info_ptr->iccp_proflen); + (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen); #endif #ifdef PNG_WRITE_sBIT_SUPPORTED if (info_ptr->valid & PNG_INFO_sBIT) @@ -84,24 +78,13 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_WRITE_cHRM_SUPPORTED if (info_ptr->valid & PNG_INFO_cHRM) - { -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_write_cHRM(png_ptr, - info_ptr->x_white, info_ptr->y_white, - info_ptr->x_red, info_ptr->y_red, - info_ptr->x_green, info_ptr->y_green, - info_ptr->x_blue, info_ptr->y_blue); -#else -# ifdef PNG_FIXED_POINT_SUPPORTED png_write_cHRM_fixed(png_ptr, - info_ptr->int_x_white, info_ptr->int_y_white, - info_ptr->int_x_red, info_ptr->int_y_red, - info_ptr->int_x_green, info_ptr->int_y_green, - info_ptr->int_x_blue, info_ptr->int_y_blue); -# endif -#endif - } + info_ptr->x_white, info_ptr->y_white, + info_ptr->x_red, info_ptr->y_red, + info_ptr->x_green, info_ptr->y_green, + info_ptr->x_blue, info_ptr->y_blue); #endif + #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED if (info_ptr->unknown_chunks_num) { @@ -114,14 +97,18 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) up++) { int keep = png_handle_as_unknown(png_ptr, up->name); + if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && !(up->location & PNG_HAVE_PLTE) && - !(up->location & PNG_HAVE_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) + up->location && + !(up->location & PNG_HAVE_PLTE) && + !(up->location & PNG_HAVE_IDAT) && + !(up->location & PNG_AFTER_IDAT) && + ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || + (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) { if (up->size == 0) png_warning(png_ptr, "Writing zero-length unknown chunk"); + png_write_chunk(png_ptr, up->name, up->data, up->size); } } @@ -147,7 +134,8 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) if (info_ptr->valid & PNG_INFO_PLTE) png_write_PLTE(png_ptr, info_ptr->palette, - (png_uint_32)info_ptr->num_palette); + (png_uint_32)info_ptr->num_palette); + else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) png_error(png_ptr, "Valid palette required for paletted images"); @@ -157,59 +145,51 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED /* Invert the alpha channel (in tRNS) */ if ((png_ptr->transformations & PNG_INVERT_ALPHA) && - info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { int j; for (j = 0; j<(int)info_ptr->num_trans; j++) - info_ptr->trans_alpha[j] = (png_byte)(255 - info_ptr->trans_alpha[j]); + info_ptr->trans_alpha[j] = + (png_byte)(255 - info_ptr->trans_alpha[j]); } #endif png_write_tRNS(png_ptr, info_ptr->trans_alpha, &(info_ptr->trans_color), - info_ptr->num_trans, info_ptr->color_type); + info_ptr->num_trans, info_ptr->color_type); } #endif #ifdef PNG_WRITE_bKGD_SUPPORTED if (info_ptr->valid & PNG_INFO_bKGD) png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type); #endif + #ifdef PNG_WRITE_hIST_SUPPORTED if (info_ptr->valid & PNG_INFO_hIST) png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette); #endif + #ifdef PNG_WRITE_oFFs_SUPPORTED if (info_ptr->valid & PNG_INFO_oFFs) png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset, - info_ptr->offset_unit_type); + info_ptr->offset_unit_type); #endif + #ifdef PNG_WRITE_pCAL_SUPPORTED if (info_ptr->valid & PNG_INFO_pCAL) png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0, - info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams, - info_ptr->pcal_units, info_ptr->pcal_params); + info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams, + info_ptr->pcal_units, info_ptr->pcal_params); #endif -#ifdef PNG_sCAL_SUPPORTED - if (info_ptr->valid & PNG_INFO_sCAL) #ifdef PNG_WRITE_sCAL_SUPPORTED -#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) - png_write_sCAL(png_ptr, (int)info_ptr->scal_unit, - info_ptr->scal_pixel_width, info_ptr->scal_pixel_height); -#else /* !FLOATING_POINT */ -#ifdef PNG_FIXED_POINT_SUPPORTED + if (info_ptr->valid & PNG_INFO_sCAL) png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit, info_ptr->scal_s_width, info_ptr->scal_s_height); -#endif /* FIXED_POINT */ -#endif /* FLOATING_POINT */ -#else /* !WRITE_sCAL */ - png_warning(png_ptr, - "png_write_sCAL not supported; sCAL chunk not written"); -#endif /* WRITE_sCAL */ #endif /* sCAL */ #ifdef PNG_WRITE_pHYs_SUPPORTED if (info_ptr->valid & PNG_INFO_pHYs) png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit, - info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type); + info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type); #endif /* pHYs */ #ifdef PNG_WRITE_tIME_SUPPORTED @@ -222,8 +202,8 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_WRITE_sPLT_SUPPORTED if (info_ptr->valid & PNG_INFO_sPLT) - for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) - png_write_sPLT(png_ptr, info_ptr->splt_palettes + i); + for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) + png_write_sPLT(png_ptr, info_ptr->splt_palettes + i); #endif /* sPLT */ #ifdef PNG_WRITE_TEXT_SUPPORTED @@ -231,45 +211,47 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) for (i = 0; i < info_ptr->num_text; i++) { png_debug2(2, "Writing header text chunk %d, type %d", i, - info_ptr->text[i].compression); + info_ptr->text[i].compression); /* An internationalized chunk? */ if (info_ptr->text[i].compression > 0) { #ifdef PNG_WRITE_iTXt_SUPPORTED - /* Write international chunk */ - png_write_iTXt(png_ptr, - info_ptr->text[i].compression, - info_ptr->text[i].key, - info_ptr->text[i].lang, - info_ptr->text[i].lang_key, - info_ptr->text[i].text); + /* Write international chunk */ + png_write_iTXt(png_ptr, + info_ptr->text[i].compression, + info_ptr->text[i].key, + info_ptr->text[i].lang, + info_ptr->text[i].lang_key, + info_ptr->text[i].text); #else png_warning(png_ptr, "Unable to write international text"); #endif /* Mark this chunk as written */ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; } + /* If we want a compressed text chunk */ else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt) { #ifdef PNG_WRITE_zTXt_SUPPORTED /* Write compressed chunk */ png_write_zTXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0, - info_ptr->text[i].compression); + info_ptr->text[i].text, 0, + info_ptr->text[i].compression); #else png_warning(png_ptr, "Unable to write compressed text"); #endif /* Mark this chunk as written */ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; } + else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) { #ifdef PNG_WRITE_tEXt_SUPPORTED /* Write uncompressed chunk */ png_write_tEXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, - 0); + info_ptr->text[i].text, + 0); /* Mark this chunk as written */ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; #else @@ -293,10 +275,12 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) { int keep = png_handle_as_unknown(png_ptr, up->name); if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && (up->location & PNG_HAVE_PLTE) && - !(up->location & PNG_HAVE_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) + up->location && + (up->location & PNG_HAVE_PLTE) && + !(up->location & PNG_HAVE_IDAT) && + !(up->location & PNG_AFTER_IDAT) && + ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || + (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) { png_write_chunk(png_ptr, up->name, up->data, up->size); } @@ -317,6 +301,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) if (png_ptr == NULL) return; + if (!(png_ptr->mode & PNG_HAVE_IDAT)) png_error(png_ptr, "No IDATs written into file"); @@ -329,8 +314,9 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_WRITE_tIME_SUPPORTED /* Check to see if user has supplied a time chunk */ if ((info_ptr->valid & PNG_INFO_tIME) && - !(png_ptr->mode & PNG_WROTE_tIME)) + !(png_ptr->mode & PNG_WROTE_tIME)) png_write_tIME(png_ptr, &(info_ptr->mod_time)); + #endif #ifdef PNG_WRITE_TEXT_SUPPORTED /* Loop through comment chunks */ @@ -344,36 +330,38 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_WRITE_iTXt_SUPPORTED /* Write international chunk */ png_write_iTXt(png_ptr, - info_ptr->text[i].compression, - info_ptr->text[i].key, - info_ptr->text[i].lang, - info_ptr->text[i].lang_key, - info_ptr->text[i].text); + info_ptr->text[i].compression, + info_ptr->text[i].key, + info_ptr->text[i].lang, + info_ptr->text[i].lang_key, + info_ptr->text[i].text); #else png_warning(png_ptr, "Unable to write international text"); #endif /* Mark this chunk as written */ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; } + else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt) { #ifdef PNG_WRITE_zTXt_SUPPORTED /* Write compressed chunk */ png_write_zTXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0, - info_ptr->text[i].compression); + info_ptr->text[i].text, 0, + info_ptr->text[i].compression); #else png_warning(png_ptr, "Unable to write compressed text"); #endif /* Mark this chunk as written */ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; } + else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) { #ifdef PNG_WRITE_tEXt_SUPPORTED /* Write uncompressed chunk */ png_write_tEXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0); + info_ptr->text[i].text, 0); #else png_warning(png_ptr, "Unable to write uncompressed text"); #endif @@ -396,9 +384,10 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) { int keep = png_handle_as_unknown(png_ptr, up->name); if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && (up->location & PNG_AFTER_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) + up->location && + (up->location & PNG_AFTER_IDAT) && + ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || + (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) { png_write_chunk(png_ptr, up->name, up->data, up->size); } @@ -428,7 +417,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_CONVERT_tIME_SUPPORTED /* "tm" structure is not supported on WindowsCE */ void PNGAPI -png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime) +png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime) { png_debug(1, "in png_convert_from_struct_tm"); @@ -453,20 +442,22 @@ png_convert_from_time_t(png_timep ptime, time_t ttime) #endif /* Initialize png_ptr structure, and allocate any memory needed */ -png_structp PNGAPI -png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn) +PNG_FUNCTION(png_structp,PNGAPI +png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) { #ifdef PNG_USER_MEM_SUPPORTED return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); + warn_fn, NULL, NULL, NULL)); } /* Alternate initialize png_ptr structure, and allocate any memory needed */ -png_structp PNGAPI -png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn) +static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */ + +PNG_FUNCTION(png_structp,PNGAPI +png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) { #endif /* PNG_USER_MEM_SUPPORTED */ volatile int png_cleanup_needed = 0; @@ -476,16 +467,15 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, png_structp png_ptr; #ifdef PNG_SETJMP_SUPPORTED #ifdef USE_FAR_KEYWORD - jmp_buf jmpbuf; + jmp_buf tmp_jmpbuf; #endif #endif - int i; png_debug(1, "in png_create_write_struct"); #ifdef PNG_USER_MEM_SUPPORTED png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr); + (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr); #else png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); #endif /* PNG_USER_MEM_SUPPORTED */ @@ -503,12 +493,12 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, encounter a png_error() will longjmp here. Since the jmpbuf is then meaningless we abort instead of returning. */ #ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) + if (setjmp(tmp_jmpbuf)) #else if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */ #endif #ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(png_ptr), jmpbuf, png_sizeof(jmp_buf)); + png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); #endif PNG_ABORT(); #endif @@ -518,59 +508,20 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, #endif /* PNG_USER_MEM_SUPPORTED */ png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - if (user_png_ver) - { - i = 0; - do - { - if (user_png_ver[i] != png_libpng_ver[i]) - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; - } while (png_libpng_ver[i++]); - } - - if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) - { - /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so - * we must recompile any applications that use any older library version. - * For versions after libpng 1.0, we will be compatible, so we need - * only check the first digit. - */ - if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || - (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) || - (user_png_ver[0] == '0' && user_png_ver[2] < '9')) - { -#ifdef PNG_STDIO_SUPPORTED - char msg[80]; - if (user_png_ver) - { - png_snprintf(msg, 80, - "Application was compiled with png.h from libpng-%.20s", - user_png_ver); - png_warning(png_ptr, msg); - } - png_snprintf(msg, 80, - "Application is running with png.c from libpng-%.20s", - png_libpng_ver); - png_warning(png_ptr, msg); -#endif -#ifdef PNG_ERROR_NUMBERS_SUPPORTED - png_ptr->flags = 0; -#endif - png_warning(png_ptr, - "Incompatible libpng version in application and library"); - png_cleanup_needed = 1; - } - } + if (!png_user_version_check(png_ptr, user_png_ver)) + png_cleanup_needed = 1; /* Initialize zbuf - compression buffer */ png_ptr->zbuf_size = PNG_ZBUF_SIZE; + if (!png_cleanup_needed) { png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, - png_ptr->zbuf_size); + png_ptr->zbuf_size); if (png_ptr->zbuf == NULL) png_cleanup_needed = 1; } + if (png_cleanup_needed) { /* Clean up PNG structure and deallocate any memory. */ @@ -578,7 +529,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, png_ptr->zbuf = NULL; #ifdef PNG_USER_MEM_SUPPORTED png_destroy_struct_2((png_voidp)png_ptr, - (png_free_ptr)free_fn, (png_voidp)mem_ptr); + (png_free_ptr)free_fn, (png_voidp)mem_ptr); #else png_destroy_struct((png_voidp)png_ptr); #endif @@ -588,8 +539,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, png_set_write_fn(png_ptr, NULL, NULL, NULL); #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT, - 1, NULL, NULL); + png_reset_filter_heuristics(png_ptr); #endif return (png_ptr); @@ -603,7 +553,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, */ void PNGAPI png_write_rows(png_structp png_ptr, png_bytepp row, - png_uint_32 num_rows) + png_uint_32 num_rows) { png_uint_32 i; /* row counter */ png_bytepp rp; /* row pointer */ @@ -656,12 +606,15 @@ png_write_image(png_structp png_ptr, png_bytepp image) /* Called by user to write a row of image data */ void PNGAPI -png_write_row(png_structp png_ptr, png_bytep row) +png_write_row(png_structp png_ptr, png_const_bytep row) { + /* 1.5.6: moved from png_struct to be a local structure: */ + png_row_info row_info; + if (png_ptr == NULL) return; - png_debug2(1, "in png_write_row (row %ld, pass %d)", + png_debug2(1, "in png_write_row (row %u, pass %d)", png_ptr->row_number, png_ptr->pass); /* Initialize transformations and other stuff if first time */ @@ -670,13 +623,14 @@ png_write_row(png_structp png_ptr, png_bytep row) /* Make sure we wrote the header info */ if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) png_error(png_ptr, - "png_write_info was never called before png_write_row"); + "png_write_info was never called before png_write_row"); /* Check for transforms that have been set but were defined out */ #if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED) if (png_ptr->transformations & PNG_INVERT_MONO) png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined"); #endif + #if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED) if (png_ptr->transformations & PNG_FILLER) png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined"); @@ -687,18 +641,22 @@ png_write_row(png_structp png_ptr, png_bytep row) png_warning(png_ptr, "PNG_WRITE_PACKSWAP_SUPPORTED is not defined"); #endif + #if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED) if (png_ptr->transformations & PNG_PACK) png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined"); #endif + #if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED) if (png_ptr->transformations & PNG_SHIFT) png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined"); #endif + #if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED) if (png_ptr->transformations & PNG_BGR) png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined"); #endif + #if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED) if (png_ptr->transformations & PNG_SWAP_BYTES) png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined"); @@ -720,6 +678,7 @@ png_write_row(png_structp png_ptr, png_bytep row) return; } break; + case 1: if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) { @@ -727,6 +686,7 @@ png_write_row(png_structp png_ptr, png_bytep row) return; } break; + case 2: if ((png_ptr->row_number & 0x07) != 4) { @@ -734,6 +694,7 @@ png_write_row(png_structp png_ptr, png_bytep row) return; } break; + case 3: if ((png_ptr->row_number & 0x03) || png_ptr->width < 3) { @@ -741,6 +702,7 @@ png_write_row(png_structp png_ptr, png_bytep row) return; } break; + case 4: if ((png_ptr->row_number & 0x03) != 2) { @@ -748,6 +710,7 @@ png_write_row(png_structp png_ptr, png_bytep row) return; } break; + case 5: if ((png_ptr->row_number & 0x01) || png_ptr->width < 2) { @@ -755,6 +718,7 @@ png_write_row(png_structp png_ptr, png_bytep row) return; } break; + case 6: if (!(png_ptr->row_number & 0x01)) { @@ -762,40 +726,39 @@ png_write_row(png_structp png_ptr, png_bytep row) return; } break; + + default: /* error: ignore it */ + break; } } #endif /* Set up row info for transformations */ - png_ptr->row_info.color_type = png_ptr->color_type; - png_ptr->row_info.width = png_ptr->usr_width; - png_ptr->row_info.channels = png_ptr->usr_channels; - png_ptr->row_info.bit_depth = png_ptr->usr_bit_depth; - png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth * - png_ptr->row_info.channels); - - png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth, - png_ptr->row_info.width); - - png_debug1(3, "row_info->color_type = %d", png_ptr->row_info.color_type); - png_debug1(3, "row_info->width = %lu", png_ptr->row_info.width); - png_debug1(3, "row_info->channels = %d", png_ptr->row_info.channels); - png_debug1(3, "row_info->bit_depth = %d", png_ptr->row_info.bit_depth); - png_debug1(3, "row_info->pixel_depth = %d", png_ptr->row_info.pixel_depth); - png_debug1(3, "row_info->rowbytes = %lu", png_ptr->row_info.rowbytes); + row_info.color_type = png_ptr->color_type; + row_info.width = png_ptr->usr_width; + row_info.channels = png_ptr->usr_channels; + row_info.bit_depth = png_ptr->usr_bit_depth; + row_info.pixel_depth = (png_byte)(row_info.bit_depth * row_info.channels); + row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width); + + png_debug1(3, "row_info->color_type = %d", row_info.color_type); + png_debug1(3, "row_info->width = %u", row_info.width); + png_debug1(3, "row_info->channels = %d", row_info.channels); + png_debug1(3, "row_info->bit_depth = %d", row_info.bit_depth); + png_debug1(3, "row_info->pixel_depth = %d", row_info.pixel_depth); + png_debug1(3, "row_info->rowbytes = %lu", (unsigned long)row_info.rowbytes); /* Copy user's row into buffer, leaving room for filter byte. */ - png_memcpy(png_ptr->row_buf + 1, row, png_ptr->row_info.rowbytes); + png_memcpy(png_ptr->row_buf + 1, row, row_info.rowbytes); #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Handle interlacing */ if (png_ptr->interlaced && png_ptr->pass < 6 && - (png_ptr->transformations & PNG_INTERLACE)) + (png_ptr->transformations & PNG_INTERLACE)) { - png_do_write_interlace(&(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->pass); + png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass); /* This should always get caught above, but still ... */ - if (!(png_ptr->row_info.width)) + if (!(row_info.width)) { png_write_finish_row(png_ptr); return; @@ -803,9 +766,18 @@ png_write_row(png_structp png_ptr, png_bytep row) } #endif +#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED /* Handle other transformations */ if (png_ptr->transformations) - png_do_write_transformations(png_ptr); + png_do_write_transformations(png_ptr, &row_info); +#endif + + /* At this point the row_info pixel depth must match the 'transformed' depth, + * which is also the output depth. + */ + if (row_info.pixel_depth != png_ptr->pixel_depth || + row_info.pixel_depth != png_ptr->transformed_pixel_depth) + png_error(png_ptr, "internal write transform logic error"); #ifdef PNG_MNG_FEATURES_SUPPORTED /* Write filter_method 64 (intrapixel differencing) only if @@ -818,15 +790,15 @@ png_write_row(png_structp png_ptr, png_bytep row) * 5. The color_type is RGB or RGBA */ if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) + (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) { /* Intrapixel differencing */ - png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_write_intrapixel(&row_info, png_ptr->row_buf + 1); } #endif /* Find a filter if necessary, filter the row and write it out. */ - png_write_find_filter(png_ptr, &(png_ptr->row_info)); + png_write_find_filter(png_ptr, &row_info); if (png_ptr->write_row_fn != NULL) (*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); @@ -841,6 +813,7 @@ png_set_flush(png_structp png_ptr, int nrows) if (png_ptr == NULL) return; + png_ptr->flush_dist = (nrows < 0 ? 0 : nrows); } @@ -854,6 +827,7 @@ png_write_flush(png_structp png_ptr) if (png_ptr == NULL) return; + /* We have already written out all of the data */ if (png_ptr->row_number >= png_ptr->num_rows) return; @@ -871,6 +845,7 @@ png_write_flush(png_structp png_ptr) { if (png_ptr->zstream.msg != NULL) png_error(png_ptr, png_ptr->zstream.msg); + else png_error(png_ptr, "zlib error"); } @@ -878,22 +853,17 @@ png_write_flush(png_structp png_ptr) if (!(png_ptr->zstream.avail_out)) { /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, - png_ptr->zbuf_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; + png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); wrote_IDAT = 1; } - } while(wrote_IDAT == 1); + } while (wrote_IDAT == 1); /* If there is any data left to be output, write it into a new IDAT */ if (png_ptr->zbuf_size != png_ptr->zstream.avail_out) { /* Write the IDAT and reset the zlib output buffer */ png_write_IDAT(png_ptr, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; + png_ptr->zbuf_size - png_ptr->zstream.avail_out); } png_ptr->flush_rows = 0; png_flush(png_ptr); @@ -914,13 +884,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) png_debug(1, "in png_destroy_write_struct"); if (png_ptr_ptr != NULL) - { png_ptr = *png_ptr_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; - mem_ptr = png_ptr->mem_ptr; -#endif - } #ifdef PNG_USER_MEM_SUPPORTED if (png_ptr != NULL) @@ -937,20 +901,20 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) { if (png_ptr != NULL) { - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); + png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->num_chunk_list = 0; - } + if (png_ptr->num_chunk_list) + { + png_free(png_ptr, png_ptr->chunk_list); + png_ptr->num_chunk_list = 0; + } #endif } #ifdef PNG_USER_MEM_SUPPORTED png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); + (png_voidp)mem_ptr); #else png_destroy_struct((png_voidp)info_ptr); #endif @@ -962,7 +926,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) png_write_destroy(png_ptr); #ifdef PNG_USER_MEM_SUPPORTED png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); + (png_voidp)mem_ptr); #else png_destroy_struct((png_voidp)png_ptr); #endif @@ -979,7 +943,9 @@ png_write_destroy(png_structp png_ptr) jmp_buf tmp_jmp; /* Save jump buffer */ #endif png_error_ptr error_fn; +#ifdef PNG_WARNINGS_SUPPORTED png_error_ptr warning_fn; +#endif png_voidp error_ptr; #ifdef PNG_USER_MEM_SUPPORTED png_free_ptr free_fn; @@ -988,7 +954,8 @@ png_write_destroy(png_structp png_ptr) png_debug(1, "in png_write_destroy"); /* Free any memory zlib uses */ - deflateEnd(&png_ptr->zstream); + if (png_ptr->zlib_state != PNG_ZLIB_UNINITIALIZED) + deflateEnd(&png_ptr->zstream); /* Free our memory. png_free checks NULL for us. */ png_free(png_ptr, png_ptr->zbuf); @@ -1001,25 +968,22 @@ png_write_destroy(png_structp png_ptr) png_free(png_ptr, png_ptr->paeth_row); #endif -#ifdef PNG_TIME_RFC1123_SUPPORTED - png_free(png_ptr, png_ptr->time_buffer); -#endif - #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - png_free(png_ptr, png_ptr->prev_filters); - png_free(png_ptr, png_ptr->filter_weights); - png_free(png_ptr, png_ptr->inv_filter_weights); + /* Use this to save a little code space, it doesn't free the filter_costs */ + png_reset_filter_heuristics(png_ptr); png_free(png_ptr, png_ptr->filter_costs); png_free(png_ptr, png_ptr->inv_filter_costs); #endif #ifdef PNG_SETJMP_SUPPORTED /* Reset structure */ - png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf)); + png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); #endif error_fn = png_ptr->error_fn; +#ifdef PNG_WARNINGS_SUPPORTED warning_fn = png_ptr->warning_fn; +#endif error_ptr = png_ptr->error_ptr; #ifdef PNG_USER_MEM_SUPPORTED free_fn = png_ptr->free_fn; @@ -1028,14 +992,16 @@ png_write_destroy(png_structp png_ptr) png_memset(png_ptr, 0, png_sizeof(png_struct)); png_ptr->error_fn = error_fn; +#ifdef PNG_WARNINGS_SUPPORTED png_ptr->warning_fn = warning_fn; +#endif png_ptr->error_ptr = error_ptr; #ifdef PNG_USER_MEM_SUPPORTED png_ptr->free_fn = free_fn; #endif #ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf)); + png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); #endif } @@ -1047,10 +1013,12 @@ png_set_filter(png_structp png_ptr, int method, int filters) if (png_ptr == NULL) return; + #ifdef PNG_MNG_FEATURES_SUPPORTED if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (method == PNG_INTRAPIXEL_DIFFERENCING)) - method = PNG_FILTER_TYPE_BASE; + (method == PNG_INTRAPIXEL_DIFFERENCING)) + method = PNG_FILTER_TYPE_BASE; + #endif if (method == PNG_FILTER_TYPE_BASE) { @@ -1062,19 +1030,26 @@ png_set_filter(png_structp png_ptr, int method, int filters) case 7: png_warning(png_ptr, "Unknown row filter for method 0"); #endif /* PNG_WRITE_FILTER_SUPPORTED */ case PNG_FILTER_VALUE_NONE: - png_ptr->do_filter = PNG_FILTER_NONE; break; + png_ptr->do_filter = PNG_FILTER_NONE; break; + #ifdef PNG_WRITE_FILTER_SUPPORTED case PNG_FILTER_VALUE_SUB: - png_ptr->do_filter = PNG_FILTER_SUB; break; + png_ptr->do_filter = PNG_FILTER_SUB; break; + case PNG_FILTER_VALUE_UP: - png_ptr->do_filter = PNG_FILTER_UP; break; + png_ptr->do_filter = PNG_FILTER_UP; break; + case PNG_FILTER_VALUE_AVG: - png_ptr->do_filter = PNG_FILTER_AVG; break; + png_ptr->do_filter = PNG_FILTER_AVG; break; + case PNG_FILTER_VALUE_PAETH: - png_ptr->do_filter = PNG_FILTER_PAETH; break; - default: png_ptr->do_filter = (png_byte)filters; break; + png_ptr->do_filter = PNG_FILTER_PAETH; break; + + default: + png_ptr->do_filter = (png_byte)filters; break; #else - default: png_warning(png_ptr, "Unknown row filter for method 0"); + default: + png_warning(png_ptr, "Unknown row filter for method 0"); #endif /* PNG_WRITE_FILTER_SUPPORTED */ } @@ -1093,7 +1068,7 @@ png_set_filter(png_structp png_ptr, int method, int filters) if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL) { png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); + (png_ptr->rowbytes + 1)); png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; } @@ -1102,12 +1077,14 @@ png_set_filter(png_structp png_ptr, int method, int filters) if (png_ptr->prev_row == NULL) { png_warning(png_ptr, "Can't add Up filter after starting"); - png_ptr->do_filter &= ~PNG_FILTER_UP; + png_ptr->do_filter = (png_byte)(png_ptr->do_filter & + ~PNG_FILTER_UP); } + else { png_ptr->up_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); + (png_ptr->rowbytes + 1)); png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; } } @@ -1117,12 +1094,14 @@ png_set_filter(png_structp png_ptr, int method, int filters) if (png_ptr->prev_row == NULL) { png_warning(png_ptr, "Can't add Average filter after starting"); - png_ptr->do_filter &= ~PNG_FILTER_AVG; + png_ptr->do_filter = (png_byte)(png_ptr->do_filter & + ~PNG_FILTER_AVG); } + else { png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); + (png_ptr->rowbytes + 1)); png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; } } @@ -1135,10 +1114,11 @@ png_set_filter(png_structp png_ptr, int method, int filters) png_warning(png_ptr, "Can't add Paeth filter after starting"); png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH); } + else { png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); + (png_ptr->rowbytes + 1)); png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; } } @@ -1160,123 +1140,242 @@ png_set_filter(png_structp png_ptr, int method, int filters) * better compression. */ #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */ -void PNGAPI -png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, - int num_weights, png_doublep filter_weights, - png_doublep filter_costs) +/* Convenience reset API. */ +static void +png_reset_filter_heuristics(png_structp png_ptr) { - int i; - - png_debug(1, "in png_set_filter_heuristics"); - - if (png_ptr == NULL) - return; - if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST) + /* Clear out any old values in the 'weights' - this must be done because if + * the app calls set_filter_heuristics multiple times with different + * 'num_weights' values we would otherwise potentially have wrong sized + * arrays. + */ + png_ptr->num_prev_filters = 0; + png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED; + if (png_ptr->prev_filters != NULL) { - png_warning(png_ptr, "Unknown filter heuristic method"); - return; + png_bytep old = png_ptr->prev_filters; + png_ptr->prev_filters = NULL; + png_free(png_ptr, old); } - - if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT) + if (png_ptr->filter_weights != NULL) { - heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED; + png_uint_16p old = png_ptr->filter_weights; + png_ptr->filter_weights = NULL; + png_free(png_ptr, old); } - if (num_weights < 0 || filter_weights == NULL || - heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED) + if (png_ptr->inv_filter_weights != NULL) { - num_weights = 0; + png_uint_16p old = png_ptr->inv_filter_weights; + png_ptr->inv_filter_weights = NULL; + png_free(png_ptr, old); } - png_ptr->num_prev_filters = (png_byte)num_weights; - png_ptr->heuristic_method = (png_byte)heuristic_method; + /* Leave the filter_costs - this array is fixed size. */ +} + +static int +png_init_filter_heuristics(png_structp png_ptr, int heuristic_method, + int num_weights) +{ + if (png_ptr == NULL) + return 0; - if (num_weights > 0) + /* Clear out the arrays */ + png_reset_filter_heuristics(png_ptr); + + /* Check arguments; the 'reset' function makes the correct settings for the + * unweighted case, but we must handle the weight case by initializing the + * arrays for the caller. + */ + if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { - if (png_ptr->prev_filters == NULL) + int i; + + if (num_weights > 0) { png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_byte) * num_weights)); + (png_uint_32)(png_sizeof(png_byte) * num_weights)); /* To make sure that the weighting starts out fairly */ for (i = 0; i < num_weights; i++) { png_ptr->prev_filters[i] = 255; } - } - if (png_ptr->filter_weights == NULL) - { png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_uint_16) * num_weights)); + (png_uint_32)(png_sizeof(png_uint_16) * num_weights)); png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_uint_16) * num_weights)); + (png_uint_32)(png_sizeof(png_uint_16) * num_weights)); + for (i = 0; i < num_weights; i++) { png_ptr->inv_filter_weights[i] = png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; } + + /* Safe to set this now */ + png_ptr->num_prev_filters = (png_byte)num_weights; + } + + /* If, in the future, there are other filter methods, this would + * need to be based on png_ptr->filter. + */ + if (png_ptr->filter_costs == NULL) + { + png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr, + (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); + + png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr, + (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); + } + + for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) + { + png_ptr->inv_filter_costs[i] = + png_ptr->filter_costs[i] = PNG_COST_FACTOR; } + /* All the arrays are inited, safe to set this: */ + png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_WEIGHTED; + + /* Return the 'ok' code. */ + return 1; + } + else if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT || + heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED) + { + return 1; + } + else + { + png_warning(png_ptr, "Unknown filter heuristic method"); + return 0; + } +} + +/* Provide floating and fixed point APIs */ +#ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, + int num_weights, png_const_doublep filter_weights, + png_const_doublep filter_costs) +{ + png_debug(1, "in png_set_filter_heuristics"); + + /* The internal API allocates all the arrays and ensures that the elements of + * those arrays are set to the default value. + */ + if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights)) + return; + + /* If using the weighted method copy in the weights. */ + if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) + { + int i; for (i = 0; i < num_weights; i++) { - if (filter_weights[i] < 0.0) + if (filter_weights[i] <= 0.0) { png_ptr->inv_filter_weights[i] = png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; } + else { png_ptr->inv_filter_weights[i] = - (png_uint_16)((double)PNG_WEIGHT_FACTOR*filter_weights[i]+0.5); + (png_uint_16)(PNG_WEIGHT_FACTOR*filter_weights[i]+.5); + png_ptr->filter_weights[i] = - (png_uint_16)((double)PNG_WEIGHT_FACTOR/filter_weights[i]+0.5); + (png_uint_16)(PNG_WEIGHT_FACTOR/filter_weights[i]+.5); } } - } - - /* If, in the future, there are other filter methods, this would - * need to be based on png_ptr->filter. - */ - if (png_ptr->filter_costs == NULL) - { - png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); - png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); - - for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) + /* Here is where we set the relative costs of the different filters. We + * should take the desired compression level into account when setting + * the costs, so that Paeth, for instance, has a high relative cost at low + * compression levels, while it has a lower relative cost at higher + * compression settings. The filter types are in order of increasing + * relative cost, so it would be possible to do this with an algorithm. + */ + for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) if (filter_costs[i] >= 1.0) { png_ptr->inv_filter_costs[i] = - png_ptr->filter_costs[i] = PNG_COST_FACTOR; + (png_uint_16)(PNG_COST_FACTOR / filter_costs[i] + .5); + + png_ptr->filter_costs[i] = + (png_uint_16)(PNG_COST_FACTOR * filter_costs[i] + .5); } } +} +#endif /* FLOATING_POINT */ - /* Here is where we set the relative costs of the different filters. We - * should take the desired compression level into account when setting - * the costs, so that Paeth, for instance, has a high relative cost at low - * compression levels, while it has a lower relative cost at higher - * compression settings. The filter types are in order of increasing - * relative cost, so it would be possible to do this with an algorithm. +#ifdef PNG_FIXED_POINT_SUPPORTED +void PNGAPI +png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method, + int num_weights, png_const_fixed_point_p filter_weights, + png_const_fixed_point_p filter_costs) +{ + png_debug(1, "in png_set_filter_heuristics_fixed"); + + /* The internal API allocates all the arrays and ensures that the elements of + * those arrays are set to the default value. */ - for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) + if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights)) + return; + + /* If using the weighted method copy in the weights. */ + if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { - if (filter_costs == NULL || filter_costs[i] < 0.0) + int i; + for (i = 0; i < num_weights; i++) { - png_ptr->inv_filter_costs[i] = - png_ptr->filter_costs[i] = PNG_COST_FACTOR; + if (filter_weights[i] <= 0) + { + png_ptr->inv_filter_weights[i] = + png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; + } + + else + { + png_ptr->inv_filter_weights[i] = (png_uint_16) + ((PNG_WEIGHT_FACTOR*filter_weights[i]+PNG_FP_HALF)/PNG_FP_1); + + png_ptr->filter_weights[i] = (png_uint_16)((PNG_WEIGHT_FACTOR* + PNG_FP_1+(filter_weights[i]/2))/filter_weights[i]); + } } - else if (filter_costs[i] >= 1.0) + + /* Here is where we set the relative costs of the different filters. We + * should take the desired compression level into account when setting + * the costs, so that Paeth, for instance, has a high relative cost at low + * compression levels, while it has a lower relative cost at higher + * compression settings. The filter types are in order of increasing + * relative cost, so it would be possible to do this with an algorithm. + */ + for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) + if (filter_costs[i] >= PNG_FP_1) { - png_ptr->inv_filter_costs[i] = - (png_uint_16)((double)PNG_COST_FACTOR / filter_costs[i] + 0.5); - png_ptr->filter_costs[i] = - (png_uint_16)((double)PNG_COST_FACTOR * filter_costs[i] + 0.5); + png_uint_32 tmp; + + /* Use a 32 bit unsigned temporary here because otherwise the + * intermediate value will be a 32 bit *signed* integer (ANSI rules) + * and this will get the wrong answer on division. + */ + tmp = PNG_COST_FACTOR*PNG_FP_1 + (filter_costs[i]/2); + tmp /= filter_costs[i]; + + png_ptr->inv_filter_costs[i] = (png_uint_16)tmp; + + tmp = PNG_COST_FACTOR * filter_costs[i] + PNG_FP_HALF; + tmp /= PNG_FP_1; + + png_ptr->filter_costs[i] = (png_uint_16)tmp; } } } +#endif /* FIXED_POINT */ #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ void PNGAPI @@ -1286,6 +1385,7 @@ png_set_compression_level(png_structp png_ptr, int level) if (png_ptr == NULL) return; + png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL; png_ptr->zlib_level = level; } @@ -1297,6 +1397,7 @@ png_set_compression_mem_level(png_structp png_ptr, int mem_level) if (png_ptr == NULL) return; + png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL; png_ptr->zlib_mem_level = mem_level; } @@ -1308,26 +1409,34 @@ png_set_compression_strategy(png_structp png_ptr, int strategy) if (png_ptr == NULL) return; + png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY; png_ptr->zlib_strategy = strategy; } +/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a + * smaller value of window_bits if it can do so safely. + */ void PNGAPI png_set_compression_window_bits(png_structp png_ptr, int window_bits) { if (png_ptr == NULL) return; + if (window_bits > 15) png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); + else if (window_bits < 8) png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); + #ifndef WBITS_8_OK /* Avoid libpng bug with 256-byte windows */ if (window_bits == 8) - { - png_warning(png_ptr, "Compression window is being reset to 512"); - window_bits = 9; - } + { + png_warning(png_ptr, "Compression window is being reset to 512"); + window_bits = 9; + } + #endif png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS; png_ptr->zlib_window_bits = window_bits; @@ -1340,29 +1449,116 @@ png_set_compression_method(png_structp png_ptr, int method) if (png_ptr == NULL) return; + if (method != 8) png_warning(png_ptr, "Only compression method 8 is supported by PNG"); + png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD; png_ptr->zlib_method = method; } +/* The following were added to libpng-1.5.4 */ +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED +void PNGAPI +png_set_text_compression_level(png_structp png_ptr, int level) +{ + png_debug(1, "in png_set_text_compression_level"); + + if (png_ptr == NULL) + return; + + png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_LEVEL; + png_ptr->zlib_text_level = level; +} + +void PNGAPI +png_set_text_compression_mem_level(png_structp png_ptr, int mem_level) +{ + png_debug(1, "in png_set_text_compression_mem_level"); + + if (png_ptr == NULL) + return; + + png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL; + png_ptr->zlib_text_mem_level = mem_level; +} + +void PNGAPI +png_set_text_compression_strategy(png_structp png_ptr, int strategy) +{ + png_debug(1, "in png_set_text_compression_strategy"); + + if (png_ptr == NULL) + return; + + png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_STRATEGY; + png_ptr->zlib_text_strategy = strategy; +} + +/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a + * smaller value of window_bits if it can do so safely. + */ +void PNGAPI +png_set_text_compression_window_bits(png_structp png_ptr, int window_bits) +{ + if (png_ptr == NULL) + return; + + if (window_bits > 15) + png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); + + else if (window_bits < 8) + png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); + +#ifndef WBITS_8_OK + /* Avoid libpng bug with 256-byte windows */ + if (window_bits == 8) + { + png_warning(png_ptr, "Text compression window is being reset to 512"); + window_bits = 9; + } + +#endif + png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS; + png_ptr->zlib_text_window_bits = window_bits; +} + +void PNGAPI +png_set_text_compression_method(png_structp png_ptr, int method) +{ + png_debug(1, "in png_set_text_compression_method"); + + if (png_ptr == NULL) + return; + + if (method != 8) + png_warning(png_ptr, "Only compression method 8 is supported by PNG"); + + png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_METHOD; + png_ptr->zlib_text_method = method; +} +#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ +/* end of API added to libpng-1.5.4 */ + void PNGAPI png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn) { if (png_ptr == NULL) return; + png_ptr->write_row_fn = write_row_fn; } #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED void PNGAPI png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr - write_user_transform_fn) + write_user_transform_fn) { png_debug(1, "in png_set_write_user_transform_fn"); if (png_ptr == NULL) return; + png_ptr->transformations |= PNG_USER_TRANSFORM; png_ptr->write_user_transform_fn = write_user_transform_fn; } @@ -1372,7 +1568,7 @@ png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr #ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI png_write_png(png_structp png_ptr, png_infop info_ptr, - int transforms, voidp params) + int transforms, voidp params) { if (png_ptr == NULL || info_ptr == NULL) return; @@ -1393,7 +1589,7 @@ png_write_png(png_structp png_ptr, png_infop info_ptr, * as appropriate to correctly scale the image. */ if ((transforms & PNG_TRANSFORM_SHIFT) - && (info_ptr->valid & PNG_INFO_sBIT)) + && (info_ptr->valid & PNG_INFO_sBIT)) png_set_shift(png_ptr, &info_ptr->sig_bit); #endif @@ -1410,9 +1606,10 @@ png_write_png(png_structp png_ptr, png_infop info_ptr, #endif #ifdef PNG_WRITE_FILLER_SUPPORTED - /* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */ + /* Pack XRGB/RGBX/ARGB/RGBA into RGB (4 channels -> 3 channels) */ if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER) png_set_filler(png_ptr, 0, PNG_FILLER_AFTER); + else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE) png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); #endif @@ -1450,8 +1647,8 @@ png_write_png(png_structp png_ptr, png_infop info_ptr, /* It is REQUIRED to call this to finish writing the rest of the file */ png_write_end(png_ptr, info_ptr); - transforms = transforms; /* Quiet compiler warnings */ - params = params; + PNG_UNUSED(transforms) /* Quiet compiler warnings */ + PNG_UNUSED(params) } #endif #endif /* PNG_WRITE_SUPPORTED */ diff --git a/src/png/pngwtran.c b/src/png/pngwtran.c index 070caa544d..96608efcb4 100644 --- a/src/png/pngwtran.c +++ b/src/png/pngwtran.c @@ -1,8 +1,8 @@ /* pngwtran.c - transforms the data in a row for PNG writers * - * Last changed in libpng 1.4.1 [February 25, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -11,16 +11,16 @@ * and license in png.h */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_WRITE_SUPPORTED #include "pngpriv.h" +#ifdef PNG_WRITE_SUPPORTED + +#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED /* Transform the data according to the user's wishes. The order of * transformations is significant. */ void /* PRIVATE */ -png_do_write_transformations(png_structp png_ptr) +png_do_write_transformations(png_structp png_ptr, png_row_infop row_info) { png_debug(1, "in png_do_write_transformations"); @@ -30,56 +30,65 @@ png_do_write_transformations(png_structp png_ptr) #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED if (png_ptr->transformations & PNG_USER_TRANSFORM) if (png_ptr->write_user_transform_fn != NULL) - (*(png_ptr->write_user_transform_fn)) /* User write transform + (*(png_ptr->write_user_transform_fn)) /* User write transform function */ - (png_ptr, /* png_ptr */ - &(png_ptr->row_info), /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_uint_32 rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ + (png_ptr, /* png_ptr */ + row_info, /* row_info: */ + /* png_uint_32 width; width of row */ + /* png_size_t rowbytes; number of bytes in row */ + /* png_byte color_type; color type of pixels */ + /* png_byte bit_depth; bit depth of samples */ + /* png_byte channels; number of channels (1-4) */ + /* png_byte pixel_depth; bits per pixel (depth*channels) */ + png_ptr->row_buf + 1); /* start of pixel data for row */ #endif + #ifdef PNG_WRITE_FILLER_SUPPORTED if (png_ptr->transformations & PNG_FILLER) - png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->flags); + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + !(png_ptr->flags & PNG_FLAG_FILLER_AFTER)); #endif + #ifdef PNG_WRITE_PACKSWAP_SUPPORTED if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_packswap(row_info, png_ptr->row_buf + 1); #endif + #ifdef PNG_WRITE_PACK_SUPPORTED if (png_ptr->transformations & PNG_PACK) - png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1, - (png_uint_32)png_ptr->bit_depth); + png_do_pack(row_info, png_ptr->row_buf + 1, + (png_uint_32)png_ptr->bit_depth); #endif + #ifdef PNG_WRITE_SWAP_SUPPORTED if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_swap(row_info, png_ptr->row_buf + 1); #endif + #ifdef PNG_WRITE_SHIFT_SUPPORTED if (png_ptr->transformations & PNG_SHIFT) - png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->shift)); + png_do_shift(row_info, png_ptr->row_buf + 1, + &(png_ptr->shift)); #endif + #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_write_swap_alpha(row_info, png_ptr->row_buf + 1); #endif + #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_write_invert_alpha(row_info, png_ptr->row_buf + 1); #endif + #ifdef PNG_WRITE_BGR_SUPPORTED if (png_ptr->transformations & PNG_BGR) - png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_bgr(row_info, png_ptr->row_buf + 1); #endif + #ifdef PNG_WRITE_INVERT_SUPPORTED if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1); + png_do_invert(row_info, png_ptr->row_buf + 1); #endif } @@ -114,9 +123,12 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) { if (*sp != 0) v |= mask; + sp++; + if (mask > 1) mask >>= 1; + else { mask = 0x80; @@ -125,10 +137,13 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) v = 0; } } + if (mask != 0x80) *dp = (png_byte)v; + break; } + case 2: { png_bytep sp, dp; @@ -140,12 +155,14 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) dp = row; shift = 6; v = 0; + for (i = 0; i < row_width; i++) { png_byte value; value = (png_byte)(*sp & 0x03); v |= (value << shift); + if (shift == 0) { shift = 6; @@ -153,14 +170,19 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) dp++; v = 0; } + else shift -= 2; + sp++; } + if (shift != 6) *dp = (png_byte)v; + break; } + case 4: { png_bytep sp, dp; @@ -172,6 +194,7 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) dp = row; shift = 4; v = 0; + for (i = 0; i < row_width; i++) { png_byte value; @@ -186,20 +209,27 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) dp++; v = 0; } + else shift -= 4; sp++; } + if (shift != 4) *dp = (png_byte)v; + break; } + + default: + break; } + row_info->bit_depth = (png_byte)bit_depth; row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels); row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, - row_info->width); + row_info->width); } } #endif @@ -213,12 +243,12 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) * data to 0 to 15. */ void /* PRIVATE */ -png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) +png_do_shift(png_row_infop row_info, png_bytep row, + png_const_color_8p bit_depth) { png_debug(1, "in png_do_shift"); - if ( - row_info->color_type != PNG_COLOR_TYPE_PALETTE) + if (row_info->color_type != PNG_COLOR_TYPE_PALETTE) { int shift_start[4], shift_dec[4]; int channels = 0; @@ -228,19 +258,23 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) shift_start[channels] = row_info->bit_depth - bit_depth->red; shift_dec[channels] = bit_depth->red; channels++; + shift_start[channels] = row_info->bit_depth - bit_depth->green; shift_dec[channels] = bit_depth->green; channels++; + shift_start[channels] = row_info->bit_depth - bit_depth->blue; shift_dec[channels] = bit_depth->blue; channels++; } + else { shift_start[channels] = row_info->bit_depth - bit_depth->gray; shift_dec[channels] = bit_depth->gray; channels++; } + if (row_info->color_type & PNG_COLOR_MASK_ALPHA) { shift_start[channels] = row_info->bit_depth - bit_depth->alpha; @@ -252,14 +286,16 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) if (row_info->bit_depth < 8) { png_bytep bp = row; - png_uint_32 i; + png_size_t i; png_byte mask; - png_uint_32 row_bytes = row_info->rowbytes; + png_size_t row_bytes = row_info->rowbytes; if (bit_depth->gray == 1 && row_info->bit_depth == 2) mask = 0x55; + else if (row_info->bit_depth == 4 && bit_depth->gray == 3) mask = 0x11; + else mask = 0xff; @@ -270,15 +306,18 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) v = *bp; *bp = 0; + for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0]) { if (j > 0) *bp |= (png_byte)((v << j) & 0xff); + else *bp |= (png_byte)((v >> (-j)) & mask); } } } + else if (row_info->bit_depth == 8) { png_bytep bp = row; @@ -294,15 +333,18 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) v = *bp; *bp = 0; + for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c]) { if (j > 0) *bp |= (png_byte)((v << j) & 0xff); + else *bp |= (png_byte)((v >> (-j)) & 0xff); } } } + else { png_bytep bp; @@ -317,10 +359,12 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1)); value = 0; + for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c]) { if (j > 0) value |= (png_uint_16)((v << j) & (png_uint_16)0xffff); + else value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff); } @@ -341,12 +385,13 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) { if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { - /* This converts from ARGB to RGBA */ if (row_info->bit_depth == 8) { + /* This converts from ARGB to RGBA */ png_bytep sp, dp; png_uint_32 i; png_uint_32 row_width = row_info->width; + for (i = 0, sp = dp = row; i < row_width; i++) { png_byte save = *(sp++); @@ -356,9 +401,11 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) *(dp++) = save; } } - /* This converts from AARRGGBB to RRGGBBAA */ + +#ifdef PNG_WRITE_16BIT_SUPPORTED else { + /* This converts from AARRGGBB to RRGGBBAA */ png_bytep sp, dp; png_uint_32 i; png_uint_32 row_width = row_info->width; @@ -378,12 +425,14 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) *(dp++) = save[1]; } } +#endif /* PNG_WRITE_16BIT_SUPPORTED */ } + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { - /* This converts from AG to GA */ if (row_info->bit_depth == 8) { + /* This converts from AG to GA */ png_bytep sp, dp; png_uint_32 i; png_uint_32 row_width = row_info->width; @@ -395,9 +444,11 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) *(dp++) = save; } } - /* This converts from AAGG to GGAA */ + +#ifdef PNG_WRITE_16BIT_SUPPORTED else { + /* This converts from AAGG to GGAA */ png_bytep sp, dp; png_uint_32 i; png_uint_32 row_width = row_info->width; @@ -413,6 +464,7 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) *(dp++) = save[1]; } } +#endif /* PNG_WRITE_16BIT_SUPPORTED */ } } } @@ -427,12 +479,13 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) { if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { - /* This inverts the alpha channel in RGBA */ if (row_info->bit_depth == 8) { + /* This inverts the alpha channel in RGBA */ png_bytep sp, dp; png_uint_32 i; png_uint_32 row_width = row_info->width; + for (i = 0, sp = dp = row; i < row_width; i++) { /* Does nothing @@ -444,9 +497,11 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) *(dp++) = (png_byte)(255 - *(sp++)); } } - /* This inverts the alpha channel in RRGGBBAA */ + +#ifdef PNG_WRITE_16BIT_SUPPORTED else { + /* This inverts the alpha channel in RRGGBBAA */ png_bytep sp, dp; png_uint_32 i; png_uint_32 row_width = row_info->width; @@ -466,12 +521,14 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) *(dp++) = (png_byte)(255 - *(sp++)); } } +#endif /* PNG_WRITE_16BIT_SUPPORTED */ } + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { - /* This inverts the alpha channel in GA */ if (row_info->bit_depth == 8) { + /* This inverts the alpha channel in GA */ png_bytep sp, dp; png_uint_32 i; png_uint_32 row_width = row_info->width; @@ -482,9 +539,11 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) *(dp++) = (png_byte)(255 - *(sp++)); } } - /* This inverts the alpha channel in GGAA */ + +#ifdef PNG_WRITE_16BIT_SUPPORTED else { + /* This inverts the alpha channel in GGAA */ png_bytep sp, dp; png_uint_32 i; png_uint_32 row_width = row_info->width; @@ -500,10 +559,12 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) *(dp++) = (png_byte)(255 - *(sp++)); } } +#endif /* PNG_WRITE_16BIT_SUPPORTED */ } } } #endif +#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */ #ifdef PNG_MNG_FEATURES_SUPPORTED /* Undoes intrapixel differencing */ @@ -512,8 +573,7 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_write_intrapixel"); - if ( - (row_info->color_type & PNG_COLOR_MASK_COLOR)) + if ((row_info->color_type & PNG_COLOR_MASK_COLOR)) { int bytes_per_pixel; png_uint_32 row_width = row_info->width; @@ -524,17 +584,21 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row) if (row_info->color_type == PNG_COLOR_TYPE_RGB) bytes_per_pixel = 3; + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) bytes_per_pixel = 4; + else return; for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) { - *(rp) = (png_byte)((*rp - *(rp+1))&0xff); - *(rp+2) = (png_byte)((*(rp+2) - *(rp+1))&0xff); + *(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff); + *(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff); } } + +#ifdef PNG_WRITE_16BIT_SUPPORTED else if (row_info->bit_depth == 16) { png_bytep rp; @@ -542,24 +606,27 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row) if (row_info->color_type == PNG_COLOR_TYPE_RGB) bytes_per_pixel = 6; + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) bytes_per_pixel = 8; + else return; for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) { - png_uint_32 s0 = (*(rp ) << 8) | *(rp+1); - png_uint_32 s1 = (*(rp+2) << 8) | *(rp+3); - png_uint_32 s2 = (*(rp+4) << 8) | *(rp+5); + png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); + png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); + png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL); png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL); - *(rp ) = (png_byte)((red >> 8) & 0xff); - *(rp+1) = (png_byte)(red & 0xff); - *(rp+4) = (png_byte)((blue >> 8) & 0xff); - *(rp+5) = (png_byte)(blue & 0xff); + *(rp ) = (png_byte)((red >> 8) & 0xff); + *(rp + 1) = (png_byte)(red & 0xff); + *(rp + 4) = (png_byte)((blue >> 8) & 0xff); + *(rp + 5) = (png_byte)(blue & 0xff); } } +#endif /* PNG_WRITE_16BIT_SUPPORTED */ } } #endif /* PNG_MNG_FEATURES_SUPPORTED */ diff --git a/src/png/pngwutil.c b/src/png/pngwutil.c index 19feb1d98c..da18e9502e 100644 --- a/src/png/pngwutil.c +++ b/src/png/pngwutil.c @@ -1,8 +1,8 @@ /* pngwutil.c - utilities to write a PNG file * - * Last changed in libpng 1.4.1 [February 25, 2010] - * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * Last changed in libpng 1.5.6 [November 3, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -11,11 +11,11 @@ * and license in png.h */ -#define PNG_NO_PEDANTIC_WARNINGS -#include "png.h" -#ifdef PNG_WRITE_SUPPORTED #include "pngpriv.h" +#ifdef PNG_WRITE_SUPPORTED + +#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED /* Place a 32-bit number into a buffer in PNG byte order. We work * with unsigned numbers for convenience, although one supported * ancillary chunk uses signed (two's complement) numbers. @@ -32,7 +32,9 @@ png_save_uint_32(png_bytep buf, png_uint_32 i) #ifdef PNG_SAVE_INT_32_SUPPORTED /* The png_save_int_32 function assumes integers are stored in two's * complement format. If this isn't the case, then this routine needs to - * be modified to write data in two's complement format. + * be modified to write data in two's complement format. Note that, + * the following works correctly even if png_int_32 has more than 32 bits + * (compare the more complex code required on read for sign extention.) */ void PNGAPI png_save_int_32(png_bytep buf, png_int_32 i) @@ -54,6 +56,7 @@ png_save_uint_16(png_bytep buf, unsigned int i) buf[0] = (png_byte)((i >> 8) & 0xff); buf[1] = (png_byte)(i & 0xff); } +#endif /* Simple function to write the signature. If we have already written * the magic bytes of the signature, or more likely, the PNG stream is @@ -74,42 +77,25 @@ png_write_sig(png_structp png_ptr) /* Write the rest of the 8 byte signature */ png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes], (png_size_t)(8 - png_ptr->sig_bytes)); + if (png_ptr->sig_bytes < 3) png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE; } -/* Write a PNG chunk all at once. The type is an array of ASCII characters - * representing the chunk name. The array must be at least 4 bytes in - * length, and does not need to be null terminated. To be safe, pass the - * pre-defined chunk names here, and if you need a new one, define it - * where the others are defined. The length is the length of the data. - * All the data must be present. If that is not possible, use the - * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end() - * functions instead. - */ -void PNGAPI -png_write_chunk(png_structp png_ptr, png_bytep chunk_name, - png_bytep data, png_size_t length) -{ - if (png_ptr == NULL) - return; - png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length); - png_write_chunk_data(png_ptr, data, (png_size_t)length); - png_write_chunk_end(png_ptr); -} - /* Write the start of a PNG chunk. The type is the chunk type. * The total_length is the sum of the lengths of all the data you will be * passing in png_write_chunk_data(). */ -void PNGAPI -png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name, - png_uint_32 length) +static void +png_write_chunk_header(png_structp png_ptr, png_uint_32 chunk_name, + png_uint_32 length) { png_byte buf[8]; - png_debug2(0, "Writing %s chunk, length = %lu", chunk_name, - (unsigned long)length); +#if defined(PNG_DEBUG) && (PNG_DEBUG > 0) + PNG_CSTRING_FROM_CHUNK(buf, chunk_name); + png_debug2(0, "Writing %s chunk, length = %lu", buf, (unsigned long)length); +#endif if (png_ptr == NULL) return; @@ -123,13 +109,16 @@ png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name, /* Write the length and the chunk name */ png_save_uint_32(buf, length); - png_memcpy(buf + 4, chunk_name, 4); - png_write_data(png_ptr, buf, (png_size_t)8); + png_save_uint_32(buf + 4, chunk_name); + png_write_data(png_ptr, buf, 8); + /* Put the chunk name into png_ptr->chunk_name */ - png_memcpy(png_ptr->chunk_name, chunk_name, 4); + png_ptr->chunk_name = chunk_name; + /* Reset the crc and run it over the chunk name */ png_reset_crc(png_ptr); - png_calculate_crc(png_ptr, chunk_name, 4); + + png_calculate_crc(png_ptr, buf + 4, 4); #ifdef PNG_IO_STATE_SUPPORTED /* Inform the I/O callback that chunk data will (possibly) be written. @@ -139,20 +128,30 @@ png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name, #endif } -/* Write the data of a PNG chunk started with png_write_chunk_start(). +void PNGAPI +png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_string, + png_uint_32 length) +{ + png_write_chunk_header(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), length); +} + +/* Write the data of a PNG chunk started with png_write_chunk_header(). * Note that multiple calls to this function are allowed, and that the * sum of the lengths from these calls *must* add up to the total_length - * given to png_write_chunk_start(). + * given to png_write_chunk_header(). */ void PNGAPI -png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length) +png_write_chunk_data(png_structp png_ptr, png_const_bytep data, + png_size_t length) { /* Write the data, and run the CRC over it */ if (png_ptr == NULL) return; + if (data != NULL && length > 0) { png_write_data(png_ptr, data, length); + /* Update the CRC after writing the data, * in case that the user I/O routine alters it. */ @@ -160,7 +159,7 @@ png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length) } } -/* Finish a chunk started with png_write_chunk_start(). */ +/* Finish a chunk started with png_write_chunk_header(). */ void PNGAPI png_write_chunk_end(png_structp png_ptr) { @@ -181,7 +180,183 @@ png_write_chunk_end(png_structp png_ptr) png_write_data(png_ptr, buf, (png_size_t)4); } -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_iCCP_SUPPORTED) +/* Write a PNG chunk all at once. The type is an array of ASCII characters + * representing the chunk name. The array must be at least 4 bytes in + * length, and does not need to be null terminated. To be safe, pass the + * pre-defined chunk names here, and if you need a new one, define it + * where the others are defined. The length is the length of the data. + * All the data must be present. If that is not possible, use the + * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end() + * functions instead. + */ +static void +png_write_complete_chunk(png_structp png_ptr, png_uint_32 chunk_name, + png_const_bytep data, png_size_t length) +{ + if (png_ptr == NULL) + return; + + /* On 64 bit architectures 'length' may not fit in a png_uint_32. */ + if (length > PNG_UINT_32_MAX) + png_error(png_ptr, "length exceeds PNG maxima"); + + png_write_chunk_header(png_ptr, chunk_name, (png_uint_32)length); + png_write_chunk_data(png_ptr, data, length); + png_write_chunk_end(png_ptr); +} + +/* This is the API that calls the internal function above. */ +void PNGAPI +png_write_chunk(png_structp png_ptr, png_const_bytep chunk_string, + png_const_bytep data, png_size_t length) +{ + png_write_complete_chunk(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), data, + length); +} + +/* Initialize the compressor for the appropriate type of compression. */ +static void +png_zlib_claim(png_structp png_ptr, png_uint_32 state) +{ + if (!(png_ptr->zlib_state & PNG_ZLIB_IN_USE)) + { + /* If already initialized for 'state' do not re-init. */ + if (png_ptr->zlib_state != state) + { + int ret = Z_OK; + png_const_charp who = "-"; + + /* If actually initialized for another state do a deflateEnd. */ + if (png_ptr->zlib_state != PNG_ZLIB_UNINITIALIZED) + { + ret = deflateEnd(&png_ptr->zstream); + who = "end"; + png_ptr->zlib_state = PNG_ZLIB_UNINITIALIZED; + } + + /* zlib itself detects an incomplete state on deflateEnd */ + if (ret == Z_OK) switch (state) + { +# ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED + case PNG_ZLIB_FOR_TEXT: + ret = deflateInit2(&png_ptr->zstream, + png_ptr->zlib_text_level, png_ptr->zlib_text_method, + png_ptr->zlib_text_window_bits, + png_ptr->zlib_text_mem_level, png_ptr->zlib_text_strategy); + who = "text"; + break; +# endif + + case PNG_ZLIB_FOR_IDAT: + ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level, + png_ptr->zlib_method, png_ptr->zlib_window_bits, + png_ptr->zlib_mem_level, png_ptr->zlib_strategy); + who = "IDAT"; + break; + + default: + png_error(png_ptr, "invalid zlib state"); + } + + if (ret == Z_OK) + png_ptr->zlib_state = state; + + else /* an error in deflateEnd or deflateInit2 */ + { + size_t pos = 0; + char msg[64]; + + pos = png_safecat(msg, sizeof msg, pos, + "zlib failed to initialize compressor ("); + pos = png_safecat(msg, sizeof msg, pos, who); + + switch (ret) + { + case Z_VERSION_ERROR: + pos = png_safecat(msg, sizeof msg, pos, ") version error"); + break; + + case Z_STREAM_ERROR: + pos = png_safecat(msg, sizeof msg, pos, ") stream error"); + break; + + case Z_MEM_ERROR: + pos = png_safecat(msg, sizeof msg, pos, ") memory error"); + break; + + default: + pos = png_safecat(msg, sizeof msg, pos, ") unknown error"); + break; + } + + png_error(png_ptr, msg); + } + } + + /* Here on success, claim the zstream: */ + png_ptr->zlib_state |= PNG_ZLIB_IN_USE; + } + + else + png_error(png_ptr, "zstream already in use (internal error)"); +} + +/* The opposite: release the stream. It is also reset, this API will warn on + * error but will not fail. + */ +static void +png_zlib_release(png_structp png_ptr) +{ + if (png_ptr->zlib_state & PNG_ZLIB_IN_USE) + { + int ret = deflateReset(&png_ptr->zstream); + + png_ptr->zlib_state &= ~PNG_ZLIB_IN_USE; + + if (ret != Z_OK) + { + png_const_charp err; + PNG_WARNING_PARAMETERS(p) + + switch (ret) + { + case Z_VERSION_ERROR: + err = "version"; + break; + + case Z_STREAM_ERROR: + err = "stream"; + break; + + case Z_MEM_ERROR: + err = "memory"; + break; + + default: + err = "unknown"; + break; + } + + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, ret); + png_warning_parameter(p, 2, err); + + if (png_ptr->zstream.msg) + err = png_ptr->zstream.msg; + else + err = "[no zlib message]"; + + png_warning_parameter(p, 3, err); + + png_formatted_warning(png_ptr, p, + "zlib failed to reset compressor: @1(@2): @3"); + } + } + + else + png_warning(png_ptr, "zstream not in use (internal error)"); +} + +#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED /* This pair of functions encapsulates the operation of (a) compressing a * text string, and (b) issuing it later as a series of chunk data writes. * The compression_state structure is shared context for these functions @@ -190,18 +365,18 @@ png_write_chunk_end(png_structp png_ptr) typedef struct { - char *input; /* The uncompressed input data */ - int input_len; /* Its length */ - int num_output_ptr; /* Number of output pointers used */ - int max_output_ptr; /* Size of output_ptr */ - png_charpp output_ptr; /* Array of pointers to output */ + png_const_bytep input; /* The uncompressed input data */ + png_size_t input_len; /* Its length */ + int num_output_ptr; /* Number of output pointers used */ + int max_output_ptr; /* Size of output_ptr */ + png_bytep *output_ptr; /* Array of pointers to output */ } compression_state; /* Compress given text into storage in the png_ptr structure */ static int /* PRIVATE */ png_text_compress(png_structp png_ptr, - png_charp text, png_size_t text_len, int compression, - compression_state *comp) + png_const_charp text, png_size_t text_len, int compression, + compression_state *comp) { int ret; @@ -209,25 +384,22 @@ png_text_compress(png_structp png_ptr, comp->max_output_ptr = 0; comp->output_ptr = NULL; comp->input = NULL; - comp->input_len = 0; + comp->input_len = text_len; /* We may just want to pass the text right through */ if (compression == PNG_TEXT_COMPRESSION_NONE) { - comp->input = text; - comp->input_len = text_len; - return((int)text_len); + comp->input = (png_const_bytep)text; + return((int)text_len); } if (compression >= PNG_TEXT_COMPRESSION_LAST) { -#ifdef PNG_STDIO_SUPPORTED - char msg[50]; - png_snprintf(msg, 50, "Unknown compression type %d", compression); - png_warning(png_ptr, msg); -#else - png_warning(png_ptr, "Unknown compression type"); -#endif + PNG_WARNING_PARAMETERS(p) + + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, + compression); + png_formatted_warning(png_ptr, p, "Unknown compression type @1"); } /* We can't write the chunk until we find out how much data we have, @@ -244,26 +416,33 @@ png_text_compress(png_structp png_ptr, * data, or if the input string is incredibly large (although this * wouldn't cause a failure, just a slowdown due to swapping). */ + png_zlib_claim(png_ptr, PNG_ZLIB_FOR_TEXT); /* Set up the compression buffers */ + /* TODO: the following cast hides a potential overflow problem. */ png_ptr->zstream.avail_in = (uInt)text_len; + + /* NOTE: assume zlib doesn't overwrite the input */ png_ptr->zstream.next_in = (Bytef *)text; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf; + png_ptr->zstream.avail_out = png_ptr->zbuf_size; + png_ptr->zstream.next_out = png_ptr->zbuf; /* This is the same compression loop as in png_write_row() */ do { /* Compress the data */ ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); + if (ret != Z_OK) { /* Error */ if (png_ptr->zstream.msg != NULL) png_error(png_ptr, png_ptr->zstream.msg); + else png_error(png_ptr, "zlib error"); } + /* Check to see if we need more room */ if (!(png_ptr->zstream.avail_out)) { @@ -276,28 +455,33 @@ png_text_compress(png_structp png_ptr, comp->max_output_ptr = comp->num_output_ptr + 4; if (comp->output_ptr != NULL) { - png_charpp old_ptr; + png_bytepp old_ptr; old_ptr = comp->output_ptr; - comp->output_ptr = (png_charpp)png_malloc(png_ptr, - (png_alloc_size_t) - (comp->max_output_ptr * png_sizeof(png_charpp))); + + comp->output_ptr = (png_bytepp)png_malloc(png_ptr, + (png_alloc_size_t) + (comp->max_output_ptr * png_sizeof(png_charpp))); + png_memcpy(comp->output_ptr, old_ptr, old_max - * png_sizeof(png_charp)); + * png_sizeof(png_charp)); + png_free(png_ptr, old_ptr); } else - comp->output_ptr = (png_charpp)png_malloc(png_ptr, - (png_alloc_size_t) - (comp->max_output_ptr * png_sizeof(png_charp))); + comp->output_ptr = (png_bytepp)png_malloc(png_ptr, + (png_alloc_size_t) + (comp->max_output_ptr * png_sizeof(png_charp))); } /* Save the data */ comp->output_ptr[comp->num_output_ptr] = - (png_charp)png_malloc(png_ptr, - (png_alloc_size_t)png_ptr->zbuf_size); + (png_bytep)png_malloc(png_ptr, + (png_alloc_size_t)png_ptr->zbuf_size); + png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); + png_ptr->zbuf_size); + comp->num_output_ptr++; /* and reset the buffer */ @@ -327,29 +511,35 @@ png_text_compress(png_structp png_ptr, comp->max_output_ptr = comp->num_output_ptr + 4; if (comp->output_ptr != NULL) { - png_charpp old_ptr; + png_bytepp old_ptr; old_ptr = comp->output_ptr; + /* This could be optimized to realloc() */ - comp->output_ptr = (png_charpp)png_malloc(png_ptr, - (png_alloc_size_t)(comp->max_output_ptr * - png_sizeof(png_charp))); + comp->output_ptr = (png_bytepp)png_malloc(png_ptr, + (png_alloc_size_t)(comp->max_output_ptr * + png_sizeof(png_charp))); + png_memcpy(comp->output_ptr, old_ptr, - old_max * png_sizeof(png_charp)); + old_max * png_sizeof(png_charp)); + png_free(png_ptr, old_ptr); } + else - comp->output_ptr = (png_charpp)png_malloc(png_ptr, - (png_alloc_size_t)(comp->max_output_ptr * - png_sizeof(png_charp))); + comp->output_ptr = (png_bytepp)png_malloc(png_ptr, + (png_alloc_size_t)(comp->max_output_ptr * + png_sizeof(png_charp))); } /* Save the data */ comp->output_ptr[comp->num_output_ptr] = - (png_charp)png_malloc(png_ptr, - (png_alloc_size_t)png_ptr->zbuf_size); + (png_bytep)png_malloc(png_ptr, + (png_alloc_size_t)png_ptr->zbuf_size); + png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); + png_ptr->zbuf_size); + comp->num_output_ptr++; /* and reset the buffer pointers */ @@ -362,6 +552,7 @@ png_text_compress(png_structp png_ptr, /* We got an error */ if (png_ptr->zstream.msg != NULL) png_error(png_ptr, png_ptr->zstream.msg); + else png_error(png_ptr, "zlib error"); } @@ -369,6 +560,7 @@ png_text_compress(png_structp png_ptr, /* Text length is number of buffers plus last buffer */ text_len = png_ptr->zbuf_size * comp->num_output_ptr; + if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out; @@ -384,30 +576,97 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp) /* Handle the no-compression case */ if (comp->input) { - png_write_chunk_data(png_ptr, (png_bytep)comp->input, - (png_size_t)comp->input_len); + png_write_chunk_data(png_ptr, comp->input, comp->input_len); + return; } +#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED + /* The zbuf_size test is because the code below doesn't work if zbuf_size is + * '1'; simply skip it to avoid memory overwrite. + */ + if (comp->input_len >= 2 && comp->input_len < 16384 && png_ptr->zbuf_size > 1) + { + unsigned int z_cmf; /* zlib compression method and flags */ + + /* Optimize the CMF field in the zlib stream. This hack of the zlib + * stream is compliant to the stream specification. + */ + + if (comp->num_output_ptr) + z_cmf = comp->output_ptr[0][0]; + else + z_cmf = png_ptr->zbuf[0]; + + if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) + { + unsigned int z_cinfo; + unsigned int half_z_window_size; + png_size_t uncompressed_text_size = comp->input_len; + + z_cinfo = z_cmf >> 4; + half_z_window_size = 1 << (z_cinfo + 7); + + while (uncompressed_text_size <= half_z_window_size && + half_z_window_size >= 256) + { + z_cinfo--; + half_z_window_size >>= 1; + } + + z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); + + if (comp->num_output_ptr) + { + + if (comp->output_ptr[0][0] != z_cmf) + { + int tmp; + + comp->output_ptr[0][0] = (png_byte)z_cmf; + tmp = comp->output_ptr[0][1] & 0xe0; + tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; + comp->output_ptr[0][1] = (png_byte)tmp; + } + } + else + { + int tmp; + + png_ptr->zbuf[0] = (png_byte)z_cmf; + tmp = png_ptr->zbuf[1] & 0xe0; + tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; + png_ptr->zbuf[1] = (png_byte)tmp; + } + } + + else + png_error(png_ptr, + "Invalid zlib compression method or flags in non-IDAT chunk"); + } +#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ + /* Write saved output buffers, if any */ for (i = 0; i < comp->num_output_ptr; i++) { - png_write_chunk_data(png_ptr, (png_bytep)comp->output_ptr[i], - (png_size_t)png_ptr->zbuf_size); + png_write_chunk_data(png_ptr, comp->output_ptr[i], + (png_size_t)png_ptr->zbuf_size); + png_free(png_ptr, comp->output_ptr[i]); } + if (comp->max_output_ptr != 0) png_free(png_ptr, comp->output_ptr); + /* Write anything left in zbuf */ if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size) png_write_chunk_data(png_ptr, png_ptr->zbuf, - (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out)); + (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out)); /* Reset zlib for another zTXt/iTXt or image data */ - deflateReset(&png_ptr->zstream); - png_ptr->zstream.data_type = Z_BINARY; + png_zlib_release(png_ptr); } -#endif +#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ /* Write the IHDR chunk, and update the png_struct with the necessary * information. Note that the rest of this code depends upon this @@ -415,12 +674,9 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp) */ void /* PRIVATE */ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, - int bit_depth, int color_type, int compression_type, int filter_type, - int interlace_type) + int bit_depth, int color_type, int compression_type, int filter_type, + int interlace_type) { - PNG_IHDR; - int ret; - png_byte buf[13]; /* Buffer to store the IHDR info */ png_debug(1, "in png_write_IHDR"); @@ -435,36 +691,61 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, case 2: case 4: case 8: - case 16: png_ptr->channels = 1; break; - default: png_error(png_ptr, - "Invalid bit depth for grayscale image"); +#ifdef PNG_WRITE_16BIT_SUPPORTED + case 16: +#endif + png_ptr->channels = 1; break; + + default: + png_error(png_ptr, + "Invalid bit depth for grayscale image"); } break; + case PNG_COLOR_TYPE_RGB: +#ifdef PNG_WRITE_16BIT_SUPPORTED if (bit_depth != 8 && bit_depth != 16) +#else + if (bit_depth != 8) +#endif png_error(png_ptr, "Invalid bit depth for RGB image"); + png_ptr->channels = 3; break; + case PNG_COLOR_TYPE_PALETTE: switch (bit_depth) { case 1: case 2: case 4: - case 8: png_ptr->channels = 1; break; - default: png_error(png_ptr, "Invalid bit depth for paletted image"); + case 8: + png_ptr->channels = 1; + break; + + default: + png_error(png_ptr, "Invalid bit depth for paletted image"); } break; + case PNG_COLOR_TYPE_GRAY_ALPHA: if (bit_depth != 8 && bit_depth != 16) png_error(png_ptr, "Invalid bit depth for grayscale+alpha image"); + png_ptr->channels = 2; break; + case PNG_COLOR_TYPE_RGB_ALPHA: +#ifdef PNG_WRITE_16BIT_SUPPORTED if (bit_depth != 8 && bit_depth != 16) +#else + if (bit_depth != 8) +#endif png_error(png_ptr, "Invalid bit depth for RGBA image"); + png_ptr->channels = 4; break; + default: png_error(png_ptr, "Invalid image color type specified"); } @@ -486,13 +767,13 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, */ if ( #ifdef PNG_MNG_FEATURES_SUPPORTED - !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && - (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) && - (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) && + !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && + ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && + (color_type == PNG_COLOR_TYPE_RGB || + color_type == PNG_COLOR_TYPE_RGB_ALPHA) && + (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) && #endif - filter_type != PNG_FILTER_TYPE_BASE) + filter_type != PNG_FILTER_TYPE_BASE) { png_warning(png_ptr, "Invalid filter type specified"); filter_type = PNG_FILTER_TYPE_BASE; @@ -500,7 +781,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, #ifdef PNG_WRITE_INTERLACING_SUPPORTED if (interlace_type != PNG_INTERLACE_NONE && - interlace_type != PNG_INTERLACE_ADAM7) + interlace_type != PNG_INTERLACE_ADAM7) { png_warning(png_ptr, "Invalid interlace type specified"); interlace_type = PNG_INTERLACE_ADAM7; @@ -537,55 +818,73 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, buf[12] = (png_byte)interlace_type; /* Write the chunk */ - png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13); + png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13); /* Initialize zlib with PNG info */ png_ptr->zstream.zalloc = png_zalloc; png_ptr->zstream.zfree = png_zfree; png_ptr->zstream.opaque = (voidpf)png_ptr; + if (!(png_ptr->do_filter)) { if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE || - png_ptr->bit_depth < 8) + png_ptr->bit_depth < 8) png_ptr->do_filter = PNG_FILTER_NONE; + else png_ptr->do_filter = PNG_ALL_FILTERS; } + if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY)) { if (png_ptr->do_filter != PNG_FILTER_NONE) png_ptr->zlib_strategy = Z_FILTERED; + else png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY; } + if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL)) png_ptr->zlib_level = Z_DEFAULT_COMPRESSION; + if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL)) png_ptr->zlib_mem_level = 8; + if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS)) png_ptr->zlib_window_bits = 15; + if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD)) png_ptr->zlib_method = 8; - ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level, - png_ptr->zlib_method, png_ptr->zlib_window_bits, - png_ptr->zlib_mem_level, png_ptr->zlib_strategy); - if (ret != Z_OK) - { - if (ret == Z_VERSION_ERROR) png_error(png_ptr, - "zlib failed to initialize compressor -- version error"); - if (ret == Z_STREAM_ERROR) png_error(png_ptr, - "zlib failed to initialize compressor -- stream error"); - if (ret == Z_MEM_ERROR) png_error(png_ptr, - "zlib failed to initialize compressor -- mem error"); - png_error(png_ptr, "zlib failed to initialize compressor"); - } - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - /* libpng is not interested in zstream.data_type */ - /* Set it to a predefined value, to avoid its evaluation inside zlib */ - png_ptr->zstream.data_type = Z_BINARY; - png_ptr->mode = PNG_HAVE_IHDR; +#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED + if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_STRATEGY)) + png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; + + if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_LEVEL)) + png_ptr->zlib_text_level = png_ptr->zlib_level; + + if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL)) + png_ptr->zlib_text_mem_level = png_ptr->zlib_mem_level; + + if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS)) + png_ptr->zlib_text_window_bits = png_ptr->zlib_window_bits; + + if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_METHOD)) + png_ptr->zlib_text_method = png_ptr->zlib_method; +#else + png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; + png_ptr->zlib_text_level = png_ptr->zlib_level; + png_ptr->zlib_text_mem_level = png_ptr->zlib_mem_level; + png_ptr->zlib_text_window_bits = png_ptr->zlib_window_bits; + png_ptr->zlib_text_method = png_ptr->zlib_method; +#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ +#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ + + /* Record that the compressor has not yet been initialized. */ + png_ptr->zlib_state = PNG_ZLIB_UNINITIALIZED; + + png_ptr->mode = PNG_HAVE_IHDR; /* not READY_FOR_ZTXT */ } /* Write the palette. We are careful not to trust png_color to be in the @@ -593,45 +892,47 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, * structure. */ void /* PRIVATE */ -png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal) +png_write_PLTE(png_structp png_ptr, png_const_colorp palette, + png_uint_32 num_pal) { - PNG_PLTE; png_uint_32 i; - png_colorp pal_ptr; + png_const_colorp pal_ptr; png_byte buf[3]; png_debug(1, "in png_write_PLTE"); if (( #ifdef PNG_MNG_FEATURES_SUPPORTED - !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) && + !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) && #endif - num_pal == 0) || num_pal > 256) + num_pal == 0) || num_pal > 256) { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_error(png_ptr, "Invalid number of colors in palette"); - } - else - { - png_warning(png_ptr, "Invalid number of colors in palette"); - return; - } + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + png_error(png_ptr, "Invalid number of colors in palette"); + } + + else + { + png_warning(png_ptr, "Invalid number of colors in palette"); + return; + } } if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR)) { png_warning(png_ptr, - "Ignoring request to write a PLTE chunk in grayscale PNG"); + "Ignoring request to write a PLTE chunk in grayscale PNG"); + return; } png_ptr->num_palette = (png_uint_16)num_pal; png_debug1(3, "num_palette = %d", png_ptr->num_palette); - png_write_chunk_start(png_ptr, (png_bytep)png_PLTE, - (png_uint_32)(num_pal * 3)); + png_write_chunk_header(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3)); #ifdef PNG_POINTER_INDEXING_SUPPORTED + for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++) { buf[0] = pal_ptr->red; @@ -639,11 +940,13 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal) buf[2] = pal_ptr->blue; png_write_chunk_data(png_ptr, buf, (png_size_t)3); } + #else /* This is a little slower but some buggy compilers need to do this * instead */ pal_ptr=palette; + for (i = 0; i < num_pal; i++) { buf[0] = pal_ptr[i].red; @@ -651,6 +954,7 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal) buf[2] = pal_ptr[i].blue; png_write_chunk_data(png_ptr, buf, (png_size_t)3); } + #endif png_write_chunk_end(png_ptr); png_ptr->mode |= PNG_HAVE_PLTE; @@ -660,16 +964,17 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal) void /* PRIVATE */ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length) { - PNG_IDAT; - png_debug(1, "in png_write_IDAT"); - /* Optimize the CMF field in the zlib stream. */ - /* This hack of the zlib stream is compliant to the stream specification. */ +#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED if (!(png_ptr->mode & PNG_HAVE_IDAT) && png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE) { + /* Optimize the CMF field in the zlib stream. This hack of the zlib + * stream is compliant to the stream specification. + */ unsigned int z_cmf = data[0]; /* zlib compression method and flags */ + if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) { /* Avoid memory underflows and multiplication overflows. @@ -680,107 +985,115 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length) if (length >= 2 && png_ptr->height < 16384 && png_ptr->width < 16384) { + /* Compute the maximum possible length of the datastream */ + + /* Number of pixels, plus for each row a filter byte + * and possibly a padding byte, so increase the maximum + * size to account for these. + */ + unsigned int z_cinfo; + unsigned int half_z_window_size; png_uint_32 uncompressed_idat_size = png_ptr->height * - ((png_ptr->width * - png_ptr->channels * png_ptr->bit_depth + 15) >> 3); - unsigned int z_cinfo = z_cmf >> 4; - unsigned int half_z_window_size = 1 << (z_cinfo + 7); + ((png_ptr->width * + png_ptr->channels * png_ptr->bit_depth + 15) >> 3); + + /* If it's interlaced, each block of 8 rows is sent as up to + * 14 rows, i.e., 6 additional rows, each with a filter byte + * and possibly a padding byte + */ + if (png_ptr->interlaced) + uncompressed_idat_size += ((png_ptr->height + 7)/8) * + (png_ptr->bit_depth < 8 ? 12 : 6); + + z_cinfo = z_cmf >> 4; + half_z_window_size = 1 << (z_cinfo + 7); + while (uncompressed_idat_size <= half_z_window_size && - half_z_window_size >= 256) + half_z_window_size >= 256) { z_cinfo--; half_z_window_size >>= 1; } + z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); - if (data[0] != (png_byte)z_cmf) + + if (data[0] != z_cmf) { + int tmp; data[0] = (png_byte)z_cmf; - data[1] &= 0xe0; - data[1] += (png_byte)(0x1f - ((z_cmf << 8) + data[1]) % 0x1f); + tmp = data[1] & 0xe0; + tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; + data[1] = (png_byte)tmp; } } } + else png_error(png_ptr, - "Invalid zlib compression method or flags in IDAT"); + "Invalid zlib compression method or flags in IDAT"); } +#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ - png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length); + png_write_complete_chunk(png_ptr, png_IDAT, data, length); png_ptr->mode |= PNG_HAVE_IDAT; + + /* Prior to 1.5.4 this code was replicated in every caller (except at the + * end, where it isn't technically necessary). Since this function has + * flushed the data we can safely reset the zlib output buffer here. + */ + png_ptr->zstream.next_out = png_ptr->zbuf; + png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; } /* Write an IEND chunk */ void /* PRIVATE */ png_write_IEND(png_structp png_ptr) { - PNG_IEND; - png_debug(1, "in png_write_IEND"); - png_write_chunk(png_ptr, (png_bytep)png_IEND, NULL, - (png_size_t)0); + png_write_complete_chunk(png_ptr, png_IEND, NULL, (png_size_t)0); png_ptr->mode |= PNG_HAVE_IEND; } #ifdef PNG_WRITE_gAMA_SUPPORTED /* Write a gAMA chunk */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -void /* PRIVATE */ -png_write_gAMA(png_structp png_ptr, double file_gamma) -{ - PNG_gAMA; - png_uint_32 igamma; - png_byte buf[4]; - - png_debug(1, "in png_write_gAMA"); - - /* file_gamma is saved in 1/100,000ths */ - igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5); - png_save_uint_32(buf, igamma); - png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4); -} -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED void /* PRIVATE */ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma) { - PNG_gAMA; png_byte buf[4]; png_debug(1, "in png_write_gAMA"); /* file_gamma is saved in 1/100,000ths */ png_save_uint_32(buf, (png_uint_32)file_gamma); - png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4); + png_write_complete_chunk(png_ptr, png_gAMA, buf, (png_size_t)4); } #endif -#endif #ifdef PNG_WRITE_sRGB_SUPPORTED /* Write a sRGB chunk */ void /* PRIVATE */ png_write_sRGB(png_structp png_ptr, int srgb_intent) { - PNG_sRGB; png_byte buf[1]; png_debug(1, "in png_write_sRGB"); if (srgb_intent >= PNG_sRGB_INTENT_LAST) - png_warning(png_ptr, - "Invalid sRGB rendering intent specified"); + png_warning(png_ptr, + "Invalid sRGB rendering intent specified"); + buf[0]=(png_byte)srgb_intent; - png_write_chunk(png_ptr, (png_bytep)png_sRGB, buf, (png_size_t)1); + png_write_complete_chunk(png_ptr, png_sRGB, buf, (png_size_t)1); } #endif #ifdef PNG_WRITE_iCCP_SUPPORTED /* Write an iCCP chunk */ void /* PRIVATE */ -png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, - png_charp profile, int profile_len) +png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type, + png_const_charp profile, int profile_len) { - PNG_iCCP; png_size_t name_len; png_charp new_name; compression_state comp; @@ -794,8 +1107,7 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, comp.input = NULL; comp.input_len = 0; - if ((name_len = png_check_keyword(png_ptr, name, - &new_name)) == 0) + if ((name_len = png_check_keyword(png_ptr, name, &new_name)) == 0) return; if (compression_type != PNG_COMPRESSION_TYPE_BASE) @@ -806,15 +1118,16 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, if (profile_len > 3) embedded_profile_len = - ((*( (png_bytep)profile ))<<24) | - ((*( (png_bytep)profile + 1))<<16) | - ((*( (png_bytep)profile + 2))<< 8) | - ((*( (png_bytep)profile + 3)) ); + ((*( (png_const_bytep)profile ))<<24) | + ((*( (png_const_bytep)profile + 1))<<16) | + ((*( (png_const_bytep)profile + 2))<< 8) | + ((*( (png_const_bytep)profile + 3)) ); if (embedded_profile_len < 0) { png_warning(png_ptr, - "Embedded profile length in iCCP chunk is negative"); + "Embedded profile length in iCCP chunk is negative"); + png_free(png_ptr, new_name); return; } @@ -822,7 +1135,8 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, if (profile_len < embedded_profile_len) { png_warning(png_ptr, - "Embedded profile length too large in iCCP chunk"); + "Embedded profile length too large in iCCP chunk"); + png_free(png_ptr, new_name); return; } @@ -830,23 +1144,29 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, if (profile_len > embedded_profile_len) { png_warning(png_ptr, - "Truncating profile to actual length in iCCP chunk"); + "Truncating profile to actual length in iCCP chunk"); + profile_len = embedded_profile_len; } if (profile_len) profile_len = png_text_compress(png_ptr, profile, - (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp); + (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp); /* Make sure we include the NULL after the name and the compression type */ - png_write_chunk_start(png_ptr, (png_bytep)png_iCCP, - (png_uint_32)(name_len + profile_len + 2)); + png_write_chunk_header(png_ptr, png_iCCP, + (png_uint_32)(name_len + profile_len + 2)); + new_name[name_len + 1] = 0x00; + png_write_chunk_data(png_ptr, (png_bytep)new_name, - (png_size_t)(name_len + 2)); + (png_size_t)(name_len + 2)); if (profile_len) + { + comp.input_len = profile_len; png_write_compressed_data_out(png_ptr, &comp); + } png_write_chunk_end(png_ptr); png_free(png_ptr, new_name); @@ -856,9 +1176,8 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, #ifdef PNG_WRITE_sPLT_SUPPORTED /* Write a sPLT chunk */ void /* PRIVATE */ -png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) +png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) { - PNG_sPLT; png_size_t name_len; png_charp new_name; png_byte entrybuf[10]; @@ -875,11 +1194,13 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) return; /* Make sure we include the NULL after the name */ - png_write_chunk_start(png_ptr, (png_bytep)png_sPLT, - (png_uint_32)(name_len + 2 + palette_size)); + png_write_chunk_header(png_ptr, png_sPLT, + (png_uint_32)(name_len + 2 + palette_size)); + png_write_chunk_data(png_ptr, (png_bytep)new_name, - (png_size_t)(name_len + 1)); - png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, (png_size_t)1); + (png_size_t)(name_len + 1)); + + png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1); /* Loop through each palette entry, writing appropriately */ #ifdef PNG_POINTER_INDEXING_SUPPORTED @@ -887,42 +1208,46 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) { if (spalette->depth == 8) { - entrybuf[0] = (png_byte)ep->red; - entrybuf[1] = (png_byte)ep->green; - entrybuf[2] = (png_byte)ep->blue; - entrybuf[3] = (png_byte)ep->alpha; - png_save_uint_16(entrybuf + 4, ep->frequency); + entrybuf[0] = (png_byte)ep->red; + entrybuf[1] = (png_byte)ep->green; + entrybuf[2] = (png_byte)ep->blue; + entrybuf[3] = (png_byte)ep->alpha; + png_save_uint_16(entrybuf + 4, ep->frequency); } + else { - png_save_uint_16(entrybuf + 0, ep->red); - png_save_uint_16(entrybuf + 2, ep->green); - png_save_uint_16(entrybuf + 4, ep->blue); - png_save_uint_16(entrybuf + 6, ep->alpha); - png_save_uint_16(entrybuf + 8, ep->frequency); + png_save_uint_16(entrybuf + 0, ep->red); + png_save_uint_16(entrybuf + 2, ep->green); + png_save_uint_16(entrybuf + 4, ep->blue); + png_save_uint_16(entrybuf + 6, ep->alpha); + png_save_uint_16(entrybuf + 8, ep->frequency); } + png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size); } #else ep=spalette->entries; - for (i=0; i>spalette->nentries; i++) + for (i = 0; i>spalette->nentries; i++) { if (spalette->depth == 8) { - entrybuf[0] = (png_byte)ep[i].red; - entrybuf[1] = (png_byte)ep[i].green; - entrybuf[2] = (png_byte)ep[i].blue; - entrybuf[3] = (png_byte)ep[i].alpha; - png_save_uint_16(entrybuf + 4, ep[i].frequency); + entrybuf[0] = (png_byte)ep[i].red; + entrybuf[1] = (png_byte)ep[i].green; + entrybuf[2] = (png_byte)ep[i].blue; + entrybuf[3] = (png_byte)ep[i].alpha; + png_save_uint_16(entrybuf + 4, ep[i].frequency); } + else { - png_save_uint_16(entrybuf + 0, ep[i].red); - png_save_uint_16(entrybuf + 2, ep[i].green); - png_save_uint_16(entrybuf + 4, ep[i].blue); - png_save_uint_16(entrybuf + 6, ep[i].alpha); - png_save_uint_16(entrybuf + 8, ep[i].frequency); + png_save_uint_16(entrybuf + 0, ep[i].red); + png_save_uint_16(entrybuf + 2, ep[i].green); + png_save_uint_16(entrybuf + 4, ep[i].blue); + png_save_uint_16(entrybuf + 6, ep[i].alpha); + png_save_uint_16(entrybuf + 8, ep[i].frequency); } + png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size); } #endif @@ -935,9 +1260,8 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) #ifdef PNG_WRITE_sBIT_SUPPORTED /* Write the sBIT chunk */ void /* PRIVATE */ -png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type) +png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type) { - PNG_sBIT; png_byte buf[4]; png_size_t size; @@ -949,7 +1273,8 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type) png_byte maxbits; maxbits = (png_byte)(color_type==PNG_COLOR_TYPE_PALETTE ? 8 : - png_ptr->usr_bit_depth); + png_ptr->usr_bit_depth); + if (sbit->red == 0 || sbit->red > maxbits || sbit->green == 0 || sbit->green > maxbits || sbit->blue == 0 || sbit->blue > maxbits) @@ -957,11 +1282,13 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type) png_warning(png_ptr, "Invalid sBIT depth specified"); return; } + buf[0] = sbit->red; buf[1] = sbit->green; buf[2] = sbit->blue; size = 3; } + else { if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth) @@ -969,6 +1296,7 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type) png_warning(png_ptr, "Invalid sBIT depth specified"); return; } + buf[0] = sbit->gray; size = 1; } @@ -980,69 +1308,22 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type) png_warning(png_ptr, "Invalid sBIT depth specified"); return; } + buf[size++] = sbit->alpha; } - png_write_chunk(png_ptr, (png_bytep)png_sBIT, buf, size); + png_write_complete_chunk(png_ptr, png_sBIT, buf, size); } #endif #ifdef PNG_WRITE_cHRM_SUPPORTED /* Write the cHRM chunk */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -void /* PRIVATE */ -png_write_cHRM(png_structp png_ptr, double white_x, double white_y, - double red_x, double red_y, double green_x, double green_y, - double blue_x, double blue_y) -{ - PNG_cHRM; - png_byte buf[32]; - - png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, - int_green_x, int_green_y, int_blue_x, int_blue_y; - - png_debug(1, "in png_write_cHRM"); - - int_white_x = (png_uint_32)(white_x * 100000.0 + 0.5); - int_white_y = (png_uint_32)(white_y * 100000.0 + 0.5); - int_red_x = (png_uint_32)(red_x * 100000.0 + 0.5); - int_red_y = (png_uint_32)(red_y * 100000.0 + 0.5); - int_green_x = (png_uint_32)(green_x * 100000.0 + 0.5); - int_green_y = (png_uint_32)(green_y * 100000.0 + 0.5); - int_blue_x = (png_uint_32)(blue_x * 100000.0 + 0.5); - int_blue_y = (png_uint_32)(blue_y * 100000.0 + 0.5); - -#ifdef PNG_CHECK_cHRM_SUPPORTED - if (png_check_cHRM_fixed(png_ptr, int_white_x, int_white_y, - int_red_x, int_red_y, int_green_x, int_green_y, int_blue_x, int_blue_y)) -#endif - { - /* Each value is saved in 1/100,000ths */ - - png_save_uint_32(buf, int_white_x); - png_save_uint_32(buf + 4, int_white_y); - - png_save_uint_32(buf + 8, int_red_x); - png_save_uint_32(buf + 12, int_red_y); - - png_save_uint_32(buf + 16, int_green_x); - png_save_uint_32(buf + 20, int_green_y); - - png_save_uint_32(buf + 24, int_blue_x); - png_save_uint_32(buf + 28, int_blue_y); - - png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32); - } -} -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED void /* PRIVATE */ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, - png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, - png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, - png_fixed_point blue_y) + png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, + png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, + png_fixed_point blue_y) { - PNG_cHRM; png_byte buf[32]; png_debug(1, "in png_write_cHRM"); @@ -1050,7 +1331,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, /* Each value is saved in 1/100,000ths */ #ifdef PNG_CHECK_cHRM_SUPPORTED if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y, - green_x, green_y, blue_x, blue_y)) + green_x, green_y, blue_x, blue_y)) #endif { png_save_uint_32(buf, (png_uint_32)white_x); @@ -1065,19 +1346,17 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, png_save_uint_32(buf + 24, (png_uint_32)blue_x); png_save_uint_32(buf + 28, (png_uint_32)blue_y); - png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32); + png_write_complete_chunk(png_ptr, png_cHRM, buf, (png_size_t)32); } } #endif -#endif #ifdef PNG_WRITE_tRNS_SUPPORTED /* Write the tRNS chunk */ void /* PRIVATE */ -png_write_tRNS(png_structp png_ptr, png_bytep trans_alpha, png_color_16p tran, - int num_trans, int color_type) +png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, + png_const_color_16p tran, int num_trans, int color_type) { - PNG_tRNS; png_byte buf[6]; png_debug(1, "in png_write_tRNS"); @@ -1089,36 +1368,46 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans_alpha, png_color_16p tran, png_warning(png_ptr, "Invalid number of transparent colors specified"); return; } + /* Write the chunk out as it is */ - png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans_alpha, - (png_size_t)num_trans); + png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans); } + else if (color_type == PNG_COLOR_TYPE_GRAY) { /* One 16 bit value */ if (tran->gray >= (1 << png_ptr->bit_depth)) { png_warning(png_ptr, - "Ignoring attempt to write tRNS chunk out-of-range for bit_depth"); + "Ignoring attempt to write tRNS chunk out-of-range for bit_depth"); + return; } + png_save_uint_16(buf, tran->gray); - png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2); + png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)2); } + else if (color_type == PNG_COLOR_TYPE_RGB) { /* Three 16 bit values */ png_save_uint_16(buf, tran->red); png_save_uint_16(buf + 2, tran->green); png_save_uint_16(buf + 4, tran->blue); +#ifdef PNG_WRITE_16BIT_SUPPORTED if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4])) +#else + if (buf[0] | buf[2] | buf[4]) +#endif { png_warning(png_ptr, "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8"); return; } - png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6); + + png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)6); } + else { png_warning(png_ptr, "Can't write tRNS with an alpha channel"); @@ -1129,9 +1418,8 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans_alpha, png_color_16p tran, #ifdef PNG_WRITE_bKGD_SUPPORTED /* Write the background chunk */ void /* PRIVATE */ -png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type) +png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) { - PNG_bKGD; png_byte buf[6]; png_debug(1, "in png_write_bKGD"); @@ -1148,32 +1436,43 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type) png_warning(png_ptr, "Invalid background palette index"); return; } + buf[0] = back->index; - png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)1); + png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)1); } + else if (color_type & PNG_COLOR_MASK_COLOR) { png_save_uint_16(buf, back->red); png_save_uint_16(buf + 2, back->green); png_save_uint_16(buf + 4, back->blue); +#ifdef PNG_WRITE_16BIT_SUPPORTED if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4])) +#else + if (buf[0] | buf[2] | buf[4]) +#endif { png_warning(png_ptr, - "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8"); + "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8"); + return; } - png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6); + + png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)6); } + else { if (back->gray >= (1 << png_ptr->bit_depth)) { png_warning(png_ptr, - "Ignoring attempt to write bKGD chunk out-of-range for bit_depth"); + "Ignoring attempt to write bKGD chunk out-of-range for bit_depth"); + return; } + png_save_uint_16(buf, back->gray); - png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2); + png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)2); } } #endif @@ -1181,9 +1480,8 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type) #ifdef PNG_WRITE_hIST_SUPPORTED /* Write the histogram */ void /* PRIVATE */ -png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist) +png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist) { - PNG_hIST; int i; png_byte buf[3]; @@ -1192,18 +1490,20 @@ png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist) if (num_hist > (int)png_ptr->num_palette) { png_debug2(3, "num_hist = %d, num_palette = %d", num_hist, - png_ptr->num_palette); + png_ptr->num_palette); + png_warning(png_ptr, "Invalid number of histogram entries specified"); return; } - png_write_chunk_start(png_ptr, (png_bytep)png_hIST, - (png_uint_32)(num_hist * 2)); + png_write_chunk_header(png_ptr, png_hIST, (png_uint_32)(num_hist * 2)); + for (i = 0; i < num_hist; i++) { png_save_uint_16(buf, hist[i]); png_write_chunk_data(png_ptr, buf, (png_size_t)2); } + png_write_chunk_end(png_ptr); } #endif @@ -1221,9 +1521,10 @@ png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist) * static keywords without having to have duplicate copies of the strings. */ png_size_t /* PRIVATE */ -png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key) +png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key) { png_size_t key_len; + png_const_charp ikp; png_charp kp, dp; int kflag; int kwarn=0; @@ -1241,6 +1542,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key) png_debug1(2, "Keyword to be checked is '%s'", key); *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2)); + if (*new_key == NULL) { png_warning(png_ptr, "Out of memory while procesing keyword"); @@ -1248,25 +1550,22 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key) } /* Replace non-printing characters with a blank and print a warning */ - for (kp = key, dp = *new_key; *kp != '\0'; kp++, dp++) + for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++) { - if ((png_byte)*kp < 0x20 || - ((png_byte)*kp > 0x7E && (png_byte)*kp < 0xA1)) + if ((png_byte)*ikp < 0x20 || + ((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1)) { -#ifdef PNG_STDIO_SUPPORTED - char msg[40]; + PNG_WARNING_PARAMETERS(p) - png_snprintf(msg, 40, - "invalid keyword character 0x%02X", (png_byte)*kp); - png_warning(png_ptr, msg); -#else - png_warning(png_ptr, "invalid character in keyword"); -#endif + png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_02x, + (png_byte)*ikp); + png_formatted_warning(png_ptr, p, "invalid keyword character 0x@1"); *dp = ' '; } + else { - *dp = *kp; + *dp = *ikp; } } *dp = '\0'; @@ -1307,11 +1606,13 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key) *(dp++) = *kp; kflag = 1; } + else if (*kp == ' ') { key_len--; - kwarn=1; + kwarn = 1; } + else { *(dp++) = *kp; @@ -1342,10 +1643,9 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key) #ifdef PNG_WRITE_tEXt_SUPPORTED /* Write a tEXt chunk */ void /* PRIVATE */ -png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text, - png_size_t text_len) +png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text, + png_size_t text_len) { - PNG_tEXt; png_size_t key_len; png_charp new_key; @@ -1356,12 +1656,13 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text, if (text == NULL || *text == '\0') text_len = 0; + else text_len = png_strlen(text); /* Make sure we include the 0 after the key */ - png_write_chunk_start(png_ptr, (png_bytep)png_tEXt, - (png_uint_32)(key_len + text_len + 1)); + png_write_chunk_header(png_ptr, png_tEXt, + (png_uint_32)(key_len + text_len + 1)); /* * We leave it to the application to meet PNG-1.0 requirements on the * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of @@ -1369,9 +1670,11 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text, * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. */ png_write_chunk_data(png_ptr, (png_bytep)new_key, - (png_size_t)(key_len + 1)); + (png_size_t)(key_len + 1)); + if (text_len) - png_write_chunk_data(png_ptr, (png_bytep)text, (png_size_t)text_len); + png_write_chunk_data(png_ptr, (png_const_bytep)text, + (png_size_t)text_len); png_write_chunk_end(png_ptr); png_free(png_ptr, new_key); @@ -1381,12 +1684,11 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text, #ifdef PNG_WRITE_zTXt_SUPPORTED /* Write a compressed text chunk */ void /* PRIVATE */ -png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text, - png_size_t text_len, int compression) +png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text, + png_size_t text_len, int compression) { - PNG_zTXt; png_size_t key_len; - char buf[1]; + png_byte buf; png_charp new_key; compression_state comp; @@ -1398,7 +1700,7 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text, comp.input = NULL; comp.input_len = 0; - if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0) + if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0) { png_free(png_ptr, new_key); return; @@ -1418,17 +1720,22 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text, &comp); /* Write start of chunk */ - png_write_chunk_start(png_ptr, (png_bytep)png_zTXt, - (png_uint_32)(key_len+text_len + 2)); + png_write_chunk_header(png_ptr, png_zTXt, + (png_uint_32)(key_len+text_len + 2)); + /* Write key */ png_write_chunk_data(png_ptr, (png_bytep)new_key, - (png_size_t)(key_len + 1)); + (png_size_t)(key_len + 1)); + png_free(png_ptr, new_key); - buf[0] = (png_byte)compression; + buf = (png_byte)compression; + /* Write compression */ - png_write_chunk_data(png_ptr, (png_bytep)buf, (png_size_t)1); + png_write_chunk_data(png_ptr, &buf, (png_size_t)1); + /* Write the compressed data */ + comp.input_len = text_len; png_write_compressed_data_out(png_ptr, &comp); /* Close the chunk */ @@ -1439,10 +1746,9 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text, #ifdef PNG_WRITE_iTXt_SUPPORTED /* Write an iTXt chunk */ void /* PRIVATE */ -png_write_iTXt(png_structp png_ptr, int compression, png_charp key, - png_charp lang, png_charp lang_key, png_charp text) +png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key, + png_const_charp lang, png_const_charp lang_key, png_const_charp text) { - PNG_iTXt; png_size_t lang_len, key_len, lang_key_len, text_len; png_charp new_lang; png_charp new_key = NULL; @@ -1456,10 +1762,10 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key, comp.output_ptr = NULL; comp.input = NULL; - if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0) + if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0) return; - if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang))==0) + if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang)) == 0) { png_warning(png_ptr, "Empty language field in iTXt chunk"); new_lang = NULL; @@ -1468,24 +1774,26 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key, if (lang_key == NULL) lang_key_len = 0; + else lang_key_len = png_strlen(lang_key); if (text == NULL) text_len = 0; + else text_len = png_strlen(text); /* Compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression-2, - &comp); + text_len = png_text_compress(png_ptr, text, text_len, compression - 2, + &comp); /* Make sure we include the compression flag, the compression byte, - * and the NULs after the key, lang, and lang_key parts */ + * and the NULs after the key, lang, and lang_key parts + */ - png_write_chunk_start(png_ptr, (png_bytep)png_iTXt, - (png_uint_32)( + png_write_chunk_header(png_ptr, png_iTXt, (png_uint_32)( 5 /* comp byte, comp flag, terminators for key, lang and lang_key */ + key_len + lang_len @@ -1497,27 +1805,32 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key, * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, - (png_size_t)(key_len + 1)); + png_write_chunk_data(png_ptr, (png_bytep)new_key, (png_size_t)(key_len + 1)); /* Set the compression flag */ - if (compression == PNG_ITXT_COMPRESSION_NONE || \ + if (compression == PNG_ITXT_COMPRESSION_NONE || compression == PNG_TEXT_COMPRESSION_NONE) - cbuf[0] = 0; + cbuf[0] = 0; + else /* compression == PNG_ITXT_COMPRESSION_zTXt */ - cbuf[0] = 1; + cbuf[0] = 1; + /* Set the compression method */ cbuf[1] = 0; + png_write_chunk_data(png_ptr, cbuf, (png_size_t)2); cbuf[0] = 0; - png_write_chunk_data(png_ptr, (new_lang ? (png_bytep)new_lang : cbuf), - (png_size_t)(lang_len + 1)); - png_write_chunk_data(png_ptr, (lang_key ? (png_bytep)lang_key : cbuf), - (png_size_t)(lang_key_len + 1)); + png_write_chunk_data(png_ptr, (new_lang ? (png_const_bytep)new_lang : cbuf), + (png_size_t)(lang_len + 1)); + + png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf), + (png_size_t)(lang_key_len + 1)); + png_write_compressed_data_out(png_ptr, &comp); png_write_chunk_end(png_ptr); + png_free(png_ptr, new_key); png_free(png_ptr, new_lang); } @@ -1527,9 +1840,8 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key, /* Write the oFFs chunk */ void /* PRIVATE */ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, - int unit_type) + int unit_type) { - PNG_oFFs; png_byte buf[9]; png_debug(1, "in png_write_oFFs"); @@ -1541,18 +1853,18 @@ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, png_save_int_32(buf + 4, y_offset); buf[8] = (png_byte)unit_type; - png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9); + png_write_complete_chunk(png_ptr, png_oFFs, buf, (png_size_t)9); } #endif #ifdef PNG_WRITE_pCAL_SUPPORTED /* Write the pCAL chunk (described in the PNG extensions document) */ void /* PRIVATE */ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, - png_int_32 X1, int type, int nparams, png_charp units, png_charpp params) + png_int_32 X1, int type, int nparams, png_const_charp units, + png_charpp params) { - PNG_pCAL; png_size_t purpose_len, units_len, total_len; - png_uint_32p params_len; + png_size_tp params_len; png_byte buf[10]; png_charp new_purpose; int i; @@ -1568,36 +1880,35 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, png_debug1(3, "pCAL units length = %d", (int)units_len); total_len = purpose_len + units_len + 10; - params_len = (png_uint_32p)png_malloc(png_ptr, - (png_alloc_size_t)(nparams * png_sizeof(png_uint_32))); + params_len = (png_size_tp)png_malloc(png_ptr, + (png_alloc_size_t)(nparams * png_sizeof(png_size_t))); /* Find the length of each parameter, making sure we don't count the - null terminator for the last parameter. */ + * null terminator for the last parameter. + */ for (i = 0; i < nparams; i++) { params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1); png_debug2(3, "pCAL parameter %d length = %lu", i, - (unsigned long) params_len[i]); - total_len += (png_size_t)params_len[i]; + (unsigned long)params_len[i]); + total_len += params_len[i]; } png_debug1(3, "pCAL total length = %d", (int)total_len); - png_write_chunk_start(png_ptr, (png_bytep)png_pCAL, (png_uint_32)total_len); - png_write_chunk_data(png_ptr, (png_bytep)new_purpose, - (png_size_t)purpose_len); + png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len); + png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose, purpose_len); png_save_int_32(buf, X0); png_save_int_32(buf + 4, X1); buf[8] = (png_byte)type; buf[9] = (png_byte)nparams; png_write_chunk_data(png_ptr, buf, (png_size_t)10); - png_write_chunk_data(png_ptr, (png_bytep)units, (png_size_t)units_len); + png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len); png_free(png_ptr, new_purpose); for (i = 0; i < nparams; i++) { - png_write_chunk_data(png_ptr, (png_bytep)params[i], - (png_size_t)params_len[i]); + png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]); } png_free(png_ptr, params_len); @@ -1607,32 +1918,10 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, #ifdef PNG_WRITE_sCAL_SUPPORTED /* Write the sCAL chunk */ -#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) -void /* PRIVATE */ -png_write_sCAL(png_structp png_ptr, int unit, double width, double height) -{ - PNG_sCAL; - char buf[64]; - png_size_t total_len; - - png_debug(1, "in png_write_sCAL"); - - buf[0] = (char)unit; - png_snprintf(buf + 1, 63, "%12.12e", width); - total_len = 1 + png_strlen(buf + 1) + 1; - png_snprintf(buf + total_len, 64-total_len, "%12.12e", height); - total_len += png_strlen(buf + total_len); - - png_debug1(3, "sCAL total length = %u", (unsigned int)total_len); - png_write_chunk(png_ptr, (png_bytep)png_sCAL, (png_bytep)buf, total_len); -} -#else -#ifdef PNG_FIXED_POINT_SUPPORTED void /* PRIVATE */ -png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width, - png_charp height) +png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width, + png_const_charp height) { - PNG_sCAL; png_byte buf[64]; png_size_t wlen, hlen, total_len; @@ -1641,6 +1930,7 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width, wlen = png_strlen(width); hlen = png_strlen(height); total_len = wlen + hlen + 2; + if (total_len > 64) { png_warning(png_ptr, "Can't write sCAL (buffer too small)"); @@ -1652,20 +1942,17 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width, png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */ png_debug1(3, "sCAL total length = %u", (unsigned int)total_len); - png_write_chunk(png_ptr, (png_bytep)png_sCAL, buf, total_len); + png_write_complete_chunk(png_ptr, png_sCAL, buf, total_len); } #endif -#endif -#endif #ifdef PNG_WRITE_pHYs_SUPPORTED /* Write the pHYs chunk */ void /* PRIVATE */ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, - png_uint_32 y_pixels_per_unit, - int unit_type) + png_uint_32 y_pixels_per_unit, + int unit_type) { - PNG_pHYs; png_byte buf[9]; png_debug(1, "in png_write_pHYs"); @@ -1677,7 +1964,7 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, png_save_uint_32(buf + 4, y_pixels_per_unit); buf[8] = (png_byte)unit_type; - png_write_chunk(png_ptr, (png_bytep)png_pHYs, buf, (png_size_t)9); + png_write_complete_chunk(png_ptr, png_pHYs, buf, (png_size_t)9); } #endif @@ -1686,9 +1973,8 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, * or png_convert_from_time_t(), or fill in the structure yourself. */ void /* PRIVATE */ -png_write_tIME(png_structp png_ptr, png_timep mod_time) +png_write_tIME(png_structp png_ptr, png_const_timep mod_time) { - PNG_tIME; png_byte buf[7]; png_debug(1, "in png_write_tIME"); @@ -1708,7 +1994,7 @@ png_write_tIME(png_structp png_ptr, png_timep mod_time) buf[5] = mod_time->minute; buf[6] = mod_time->second; - png_write_chunk(png_ptr, (png_bytep)png_tIME, buf, (png_size_t)7); + png_write_complete_chunk(png_ptr, png_tIME, buf, (png_size_t)7); } #endif @@ -1720,36 +2006,41 @@ png_write_start_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ - int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; + static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; /* Offset to next interlace block */ - int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; /* Start of interlace block in the y direction */ - int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; + static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; /* Offset to next interlace block in the y direction */ - int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; + static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; #endif - png_size_t buf_size; + png_alloc_size_t buf_size; + int usr_pixel_depth; png_debug(1, "in png_write_start_row"); - buf_size = (png_size_t)(PNG_ROWBYTES( - png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1); + usr_pixel_depth = png_ptr->usr_channels * png_ptr->usr_bit_depth; + buf_size = PNG_ROWBYTES(usr_pixel_depth, png_ptr->width) + 1; + + /* 1.5.6: added to allow checking in the row write code. */ + png_ptr->transformed_pixel_depth = png_ptr->pixel_depth; + png_ptr->maximum_pixel_depth = (png_byte)usr_pixel_depth; /* Set up row buffer */ - png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, - (png_alloc_size_t)buf_size); + png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, buf_size); + png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE; #ifdef PNG_WRITE_FILTER_SUPPORTED /* Set up filtering buffer, if using this filter */ if (png_ptr->do_filter & PNG_FILTER_SUB) { - png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, - (png_alloc_size_t)(png_ptr->rowbytes + 1)); + png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1); + png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; } @@ -1757,27 +2048,29 @@ png_write_start_row(png_structp png_ptr) if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH)) { /* Set up previous row buffer */ - png_ptr->prev_row = (png_bytep)png_calloc(png_ptr, - (png_alloc_size_t)buf_size); + png_ptr->prev_row = (png_bytep)png_calloc(png_ptr, buf_size); if (png_ptr->do_filter & PNG_FILTER_UP) { png_ptr->up_row = (png_bytep)png_malloc(png_ptr, - (png_size_t)(png_ptr->rowbytes + 1)); + png_ptr->rowbytes + 1); + png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; } if (png_ptr->do_filter & PNG_FILTER_AVG) { png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - (png_alloc_size_t)(png_ptr->rowbytes + 1)); + png_ptr->rowbytes + 1); + png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; } if (png_ptr->do_filter & PNG_FILTER_PAETH) { png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, - (png_size_t)(png_ptr->rowbytes + 1)); + png_ptr->rowbytes + 1); + png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; } } @@ -1790,22 +2083,27 @@ png_write_start_row(png_structp png_ptr) if (!(png_ptr->transformations & PNG_INTERLACE)) { png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - - png_pass_ystart[0]) / png_pass_yinc[0]; + png_pass_ystart[0]) / png_pass_yinc[0]; + png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 - - png_pass_start[0]) / png_pass_inc[0]; + png_pass_start[0]) / png_pass_inc[0]; } + else { png_ptr->num_rows = png_ptr->height; png_ptr->usr_width = png_ptr->width; } } + else #endif { png_ptr->num_rows = png_ptr->height; png_ptr->usr_width = png_ptr->width; } + + png_zlib_claim(png_ptr, PNG_ZLIB_FOR_IDAT); png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; png_ptr->zstream.next_out = png_ptr->zbuf; } @@ -1818,16 +2116,16 @@ png_write_finish_row(png_structp png_ptr) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ - int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; + static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; /* Offset to next interlace block */ - int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; /* Start of interlace block in the y direction */ - int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; + static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; /* Offset to next interlace block in the y direction */ - int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; + static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; #endif int ret; @@ -1850,24 +2148,30 @@ png_write_finish_row(png_structp png_ptr) { png_ptr->pass++; } + else { /* Loop until we find a non-zero width or height pass */ do { png_ptr->pass++; + if (png_ptr->pass >= 7) break; + png_ptr->usr_width = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; + png_pass_inc[png_ptr->pass] - 1 - + png_pass_start[png_ptr->pass]) / + png_pass_inc[png_ptr->pass]; + png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; + png_pass_yinc[png_ptr->pass] - 1 - + png_pass_ystart[png_ptr->pass]) / + png_pass_yinc[png_ptr->pass]; + if (png_ptr->transformations & PNG_INTERLACE) break; + } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0); } @@ -1877,8 +2181,9 @@ png_write_finish_row(png_structp png_ptr) { if (png_ptr->prev_row != NULL) png_memset(png_ptr->prev_row, 0, - (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels* - png_ptr->usr_bit_depth, png_ptr->width)) + 1); + (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels* + png_ptr->usr_bit_depth, png_ptr->width)) + 1); + return; } } @@ -1890,6 +2195,7 @@ png_write_finish_row(png_structp png_ptr) { /* Tell the compressor we are done */ ret = deflate(&png_ptr->zstream, Z_FINISH); + /* Check for an error */ if (ret == Z_OK) { @@ -1901,10 +2207,12 @@ png_write_finish_row(png_structp png_ptr) png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; } } + else if (ret != Z_STREAM_END) { if (png_ptr->zstream.msg != NULL) png_error(png_ptr, png_ptr->zstream.msg); + else png_error(png_ptr, "zlib error"); } @@ -1914,10 +2222,10 @@ png_write_finish_row(png_structp png_ptr) if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) { png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size - - png_ptr->zstream.avail_out); + png_ptr->zstream.avail_out); } - deflateReset(&png_ptr->zstream); + png_zlib_release(png_ptr); png_ptr->zstream.data_type = Z_BINARY; } @@ -1935,10 +2243,10 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ - int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; + static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; /* Offset to next interlace block */ - int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; png_debug(1, "in png_do_write_interlace"); @@ -1961,6 +2269,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) dp = row; d = 0; shift = 7; + for (i = png_pass_start[pass]; i < row_width; i += png_pass_inc[pass]) { @@ -1974,14 +2283,17 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) *dp++ = (png_byte)d; d = 0; } + else shift--; } if (shift != 7) *dp = (png_byte)d; + break; } + case 2: { png_bytep sp; @@ -1995,6 +2307,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) dp = row; shift = 6; d = 0; + for (i = png_pass_start[pass]; i < row_width; i += png_pass_inc[pass]) { @@ -2008,13 +2321,16 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) *dp++ = (png_byte)d; d = 0; } + else shift -= 2; } if (shift != 6) - *dp = (png_byte)d; + *dp = (png_byte)d; + break; } + case 4: { png_bytep sp; @@ -2029,7 +2345,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) shift = 4; d = 0; for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) + i += png_pass_inc[pass]) { sp = row + (png_size_t)(i >> 1); value = (*sp >> ((1 - (int)(i & 0x01)) << 2)) & 0x0f; @@ -2041,13 +2357,16 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) *dp++ = (png_byte)d; d = 0; } + else shift -= 4; } if (shift != 4) *dp = (png_byte)d; + break; } + default: { png_bytep sp; @@ -2058,18 +2377,21 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) /* Start at the beginning */ dp = row; + /* Find out how many bytes each pixel takes up */ pixel_bytes = (row_info->pixel_depth >> 3); - /* Loop through the row, only looking at the pixels that - matter */ + + /* Loop through the row, only looking at the pixels that matter */ for (i = png_pass_start[pass]; i < row_width; i += png_pass_inc[pass]) { /* Find out where the original pixel is */ sp = row + (png_size_t)i * pixel_bytes; + /* Move the pixel */ if (dp != sp) png_memcpy(dp, sp, pixel_bytes); + /* Next pixel */ dp += pixel_bytes; } @@ -2078,11 +2400,12 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) } /* Set new row width */ row_info->width = (row_info->width + - png_pass_inc[pass] - 1 - - png_pass_start[pass]) / - png_pass_inc[pass]; - row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, - row_info->width); + png_pass_inc[pass] - 1 - + png_pass_start[pass]) / + png_pass_inc[pass]; + + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, + row_info->width); } } #endif @@ -2091,6 +2414,9 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) * been specified by the application, and then writes the row out with the * chosen filter. */ +static void png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, + png_size_t row_bytes); + #define PNG_MAXSUM (((png_uint_32)(-1)) >> 1) #define PNG_HISHIFT 10 #define PNG_LOMASK ((png_uint_32)0xffffL) @@ -2103,9 +2429,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) png_bytep prev_row, row_buf; png_uint_32 mins, bpp; png_byte filter_to_do = png_ptr->do_filter; - png_uint_32 row_bytes = row_info->rowbytes; + png_size_t row_bytes = row_info->rowbytes; #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - int num_p_filters = (int)png_ptr->num_prev_filters; + int num_p_filters = png_ptr->num_prev_filters; #endif png_debug(1, "in png_write_find_filter"); @@ -2113,8 +2439,8 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) #ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS) { - /* These will never be selected so we need not test them. */ - filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH); + /* These will never be selected so we need not test them. */ + filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH); } #endif @@ -2140,11 +2466,14 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) * computationally expensive). * * GRR 980525: consider also + * * (1) minimum sum of absolute differences from running average (i.e., * keep running sum of non-absolute differences & count of bytes) * [track dispersion, too? restart average if dispersion too large?] + * * (1b) minimum sum of absolute differences from sliding average, probably * with window size <= deflate window (usually 32K) + * * (2) minimum sum of squared differences from zero or running average * (i.e., ~ root-mean-square approach) */ @@ -2153,12 +2482,11 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) /* We don't need to test the 'no filter' case if this is the only filter * that has been chosen, as it doesn't actually do anything to the data. */ - if ((filter_to_do & PNG_FILTER_NONE) && - filter_to_do != PNG_FILTER_NONE) + if ((filter_to_do & PNG_FILTER_NONE) && filter_to_do != PNG_FILTER_NONE) { png_bytep rp; png_uint_32 sum = 0; - png_uint_32 i; + png_size_t i; int v; for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++) @@ -2181,9 +2509,10 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE) { sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } @@ -2192,12 +2521,14 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) * it has the minimum possible computational cost - none). */ sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (sumhi > PNG_HIMASK) sum = PNG_MAXSUM; + else sum = (sumhi << PNG_HISHIFT) + sumlo; } @@ -2210,17 +2541,20 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) /* It's the only filter so no testing is needed */ { png_bytep rp, lp, dp; - png_uint_32 i; + png_size_t i; + for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp; i++, rp++, dp++) { *dp = *rp; } + for (lp = row_buf + 1; i < row_bytes; i++, rp++, lp++, dp++) { *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff); } + best_row = png_ptr->sub_row; } @@ -2228,7 +2562,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) { png_bytep rp, dp, lp; png_uint_32 sum = 0, lmins = mins; - png_uint_32 i; + png_size_t i; int v; #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED @@ -2248,19 +2582,22 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB) { lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (lmhi > PNG_HIMASK) lmins = PNG_MAXSUM; + else lmins = (lmhi << PNG_HISHIFT) + lmlo; } @@ -2273,6 +2610,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) sum += (v < 128) ? v : 256 - v; } + for (lp = row_buf + 1; i < row_bytes; i++, rp++, lp++, dp++) { @@ -2297,19 +2635,22 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB) { sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (sumhi > PNG_HIMASK) sum = PNG_MAXSUM; + else sum = (sumhi << PNG_HISHIFT) + sumlo; } @@ -2326,14 +2667,15 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (filter_to_do == PNG_FILTER_UP) { png_bytep rp, dp, pp; - png_uint_32 i; + png_size_t i; for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, - pp = prev_row + 1; i < row_bytes; - i++, rp++, pp++, dp++) + pp = prev_row + 1; i < row_bytes; + i++, rp++, pp++, dp++) { *dp = (png_byte)(((int)*rp - (int)*pp) & 0xff); } + best_row = png_ptr->up_row; } @@ -2341,7 +2683,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) { png_bytep rp, dp, pp; png_uint_32 sum = 0, lmins = mins; - png_uint_32 i; + png_size_t i; int v; @@ -2358,26 +2700,29 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP) { lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (lmhi > PNG_HIMASK) lmins = PNG_MAXSUM; + else lmins = (lmhi << PNG_HISHIFT) + lmlo; } #endif for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, - pp = prev_row + 1; i < row_bytes; i++) + pp = prev_row + 1; i < row_bytes; i++) { v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); @@ -2400,19 +2745,22 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP) { sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (sumhi > PNG_HIMASK) sum = PNG_MAXSUM; + else sum = (sumhi << PNG_HISHIFT) + sumlo; } @@ -2430,11 +2778,13 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) { png_bytep rp, dp, pp, lp; png_uint_32 i; + for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1, pp = prev_row + 1; i < bpp; i++) { *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff); } + for (lp = row_buf + 1; i < row_bytes; i++) { *dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) @@ -2447,7 +2797,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) { png_bytep rp, dp, pp, lp; png_uint_32 sum = 0, lmins = mins; - png_uint_32 i; + png_size_t i; int v; #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED @@ -2463,19 +2813,22 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG) { lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (lmhi > PNG_HIMASK) lmins = PNG_MAXSUM; + else lmins = (lmhi << PNG_HISHIFT) + lmlo; } @@ -2488,10 +2841,11 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) sum += (v < 128) ? v : 256 - v; } + for (lp = row_buf + 1; i < row_bytes; i++) { v = *dp++ = - (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff); + (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff); sum += (v < 128) ? v : 256 - v; @@ -2512,19 +2866,22 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE) { sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (sumhi > PNG_HIMASK) sum = PNG_MAXSUM; + else sum = (sumhi << PNG_HISHIFT) + sumlo; } @@ -2541,9 +2898,10 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (filter_to_do == PNG_FILTER_PAETH) { png_bytep rp, dp, pp, cp, lp; - png_uint_32 i; + png_size_t i; + for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, - pp = prev_row + 1; i < bpp; i++) + pp = prev_row + 1; i < bpp; i++) { *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); } @@ -2580,7 +2938,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) { png_bytep rp, dp, pp, cp, lp; png_uint_32 sum = 0, lmins = mins; - png_uint_32 i; + png_size_t i; int v; #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED @@ -2596,26 +2954,29 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH) { lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (lmhi > PNG_HIMASK) lmins = PNG_MAXSUM; + else lmins = (lmhi << PNG_HISHIFT) + lmlo; } #endif for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, - pp = prev_row + 1; i < bpp; i++) + pp = prev_row + 1; i < bpp; i++) { v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); @@ -2648,10 +3009,13 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) pa = abs(p - a); pb = abs(p - b); pc = abs(p - c); + if (pa <= pb && pa <= pc) p = a; + else if (pb <= pc) p = b; + else p = c; #endif /* PNG_SLOW_PAETH */ @@ -2677,19 +3041,22 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH) { sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; + sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; + PNG_WEIGHT_SHIFT; } } sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; + sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; + PNG_COST_SHIFT; if (sumhi > PNG_HIMASK) sum = PNG_MAXSUM; + else sum = (sumhi << PNG_HISHIFT) + sumlo; } @@ -2701,9 +3068,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) } } #endif /* PNG_WRITE_FILTER_SUPPORTED */ - /* Do the actual writing of the filtered row data from the chosen filter. */ - png_write_filtered_row(png_ptr, best_row); + /* Do the actual writing of the filtered row data from the chosen filter. */ + png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1); #ifdef PNG_WRITE_FILTER_SUPPORTED #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED @@ -2711,10 +3078,12 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (png_ptr->num_prev_filters > 0) { int j; + for (j = 1; j < num_p_filters; j++) { png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1]; } + png_ptr->prev_filters[j] = best_row[0]; } #endif @@ -2723,8 +3092,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) /* Do the actual writing of a previously filtered row. */ -void /* PRIVATE */ -png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row) +static void +png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, + png_size_t avail/*includes filter byte*/) { png_debug(1, "in png_write_filtered_row"); @@ -2732,19 +3102,45 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row) /* Set up the zlib input buffer */ png_ptr->zstream.next_in = filtered_row; - png_ptr->zstream.avail_in = (uInt)png_ptr->row_info.rowbytes + 1; + png_ptr->zstream.avail_in = 0; /* Repeat until we have compressed all the data */ do { int ret; /* Return of zlib */ + /* Record the number of bytes available - zlib supports at least 65535 + * bytes at one step, depending on the size of the zlib type 'uInt', the + * maximum size zlib can write at once is ZLIB_IO_MAX (from pngpriv.h). + * Use this because on 16 bit systems 'rowbytes' can be up to 65536 (i.e. + * one more than 16 bits) and, in this case 'rowbytes+1' can overflow a + * uInt. ZLIB_IO_MAX can be safely reduced to cause zlib to be called + * with smaller chunks of data. + */ + if (png_ptr->zstream.avail_in == 0) + { + if (avail > ZLIB_IO_MAX) + { + png_ptr->zstream.avail_in = ZLIB_IO_MAX; + avail -= ZLIB_IO_MAX; + } + + else + { + /* So this will fit in the available uInt space: */ + png_ptr->zstream.avail_in = (uInt)avail; + avail = 0; + } + } + /* Compress the data */ ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); + /* Check for compression errors */ if (ret != Z_OK) { if (png_ptr->zstream.msg != NULL) png_error(png_ptr, png_ptr->zstream.msg); + else png_error(png_ptr, "zlib error"); } @@ -2754,11 +3150,9 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row) { /* Write the IDAT and reset the zlib output buffer */ png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; } /* Repeat until all data has been compressed */ - } while (png_ptr->zstream.avail_in); + } while (avail > 0 || png_ptr->zstream.avail_in > 0); /* Swap the current and previous rows */ if (png_ptr->prev_row != NULL) diff --git a/src/png/projects/owatcom/libpng.tgt b/src/png/projects/owatcom/libpng.tgt new file mode 100644 index 0000000000..096b2eef17 --- /dev/null +++ b/src/png/projects/owatcom/libpng.tgt @@ -0,0 +1,383 @@ +40 +targetIdent +0 +MProject +1 +MComponent +0 +2 +WString +3 +LIB +3 +WString +5 +n_2sn +1 +0 +0 +4 +MCommand +0 +5 +MCommand +0 +6 +MItem +10 +libpng.lib +7 +WString +3 +LIB +8 +WVList +0 +9 +WVList +1 +10 +ActionStates +11 +WString +5 +&Make +12 +WVList +0 +-1 +1 +1 +0 +13 +WPickList +16 +14 +MItem +3 +*.c +15 +WString +4 +COBJ +16 +WVList +2 +17 +MVState +18 +WString +3 +WCC +19 +WString +25 +n????Include directories: +1 +20 +WString +39 +"$(%zlib);$(%watcom)/h;$(%watcom)/h/nt" +0 +21 +MVState +22 +WString +3 +WCC +23 +WString +25 +n????Include directories: +0 +24 +WString +39 +"$(%zlib);$(%watcom)/h;$(%watcom)/h/nt" +0 +25 +WVList +1 +26 +ActionStates +27 +WString +5 +&Make +28 +WVList +0 +-1 +1 +1 +0 +29 +MItem +11 +..\..\png.c +30 +WString +4 +COBJ +31 +WVList +0 +32 +WVList +0 +14 +1 +1 +0 +33 +MItem +16 +..\..\pngerror.c +34 +WString +4 +COBJ +35 +WVList +0 +36 +WVList +0 +14 +1 +1 +0 +37 +MItem +14 +..\..\pngget.c +38 +WString +4 +COBJ +39 +WVList +0 +40 +WVList +0 +14 +1 +1 +0 +41 +MItem +14 +..\..\pngmem.c +42 +WString +4 +COBJ +43 +WVList +0 +44 +WVList +0 +14 +1 +1 +0 +45 +MItem +16 +..\..\pngpread.c +46 +WString +4 +COBJ +47 +WVList +0 +48 +WVList +0 +14 +1 +1 +0 +49 +MItem +15 +..\..\pngread.c +50 +WString +4 +COBJ +51 +WVList +0 +52 +WVList +0 +14 +1 +1 +0 +53 +MItem +14 +..\..\pngrio.c +54 +WString +4 +COBJ +55 +WVList +0 +56 +WVList +0 +14 +1 +1 +0 +57 +MItem +16 +..\..\pngrtran.c +58 +WString +4 +COBJ +59 +WVList +0 +60 +WVList +0 +14 +1 +1 +0 +61 +MItem +16 +..\..\pngrutil.c +62 +WString +4 +COBJ +63 +WVList +0 +64 +WVList +0 +14 +1 +1 +0 +65 +MItem +14 +..\..\pngset.c +66 +WString +4 +COBJ +67 +WVList +0 +68 +WVList +0 +14 +1 +1 +0 +69 +MItem +16 +..\..\pngtrans.c +70 +WString +4 +COBJ +71 +WVList +0 +72 +WVList +0 +14 +1 +1 +0 +73 +MItem +14 +..\..\pngwio.c +74 +WString +4 +COBJ +75 +WVList +0 +76 +WVList +0 +14 +1 +1 +0 +77 +MItem +16 +..\..\pngwrite.c +78 +WString +4 +COBJ +79 +WVList +0 +80 +WVList +0 +14 +1 +1 +0 +81 +MItem +16 +..\..\pngwtran.c +82 +WString +4 +COBJ +83 +WVList +0 +84 +WVList +0 +14 +1 +1 +0 +85 +MItem +16 +..\..\pngwutil.c +86 +WString +4 +COBJ +87 +WVList +0 +88 +WVList +0 +14 +1 +1 +0 diff --git a/src/png/projects/owatcom/libpng.wpj b/src/png/projects/owatcom/libpng.wpj new file mode 100644 index 0000000000..e2e591cf87 --- /dev/null +++ b/src/png/projects/owatcom/libpng.wpj @@ -0,0 +1,92 @@ +40 +projectIdent +0 +VpeMain +1 +WRect +256 +146 +8966 +9303 +2 +MProject +3 +MCommand +322 +# Locations of zlib and (if required) awk (change as required:) +set zlib=..\..\..\zlib +set awk= +# +@if not exist pngconfig.dfa $(MAKE) $(__MAKEOPTS__) -f pngconfig.mak defaults +@if exist config.inf type config.inf +@echo Checking for the libpng configuration file pnglibconf.h +$(MAKE) $(__MAKEOPTS__) -f pngconfig.mak +4 +MCommand +19 +@type pngconfig.inf +3 +5 +WFileName +10 +libpng.tgt +6 +WFileName +11 +pngtest.tgt +7 +WFileName +12 +pngvalid.tgt +8 +WVList +3 +9 +VComponent +10 +WRect +0 +0 +5644 +4183 +0 +0 +11 +WFileName +10 +libpng.tgt +0 +0 +12 +VComponent +13 +WRect +1280 +1560 +5644 +4183 +0 +0 +14 +WFileName +11 +pngtest.tgt +0 +1 +15 +VComponent +16 +WRect +530 +507 +5644 +4183 +0 +0 +17 +WFileName +12 +pngvalid.tgt +0 +1 +9 diff --git a/src/png/projects/owatcom/pngconfig.mak b/src/png/projects/owatcom/pngconfig.mak new file mode 100755 index 0000000000..6943e15d4f --- /dev/null +++ b/src/png/projects/owatcom/pngconfig.mak @@ -0,0 +1,160 @@ +# This is an OpenWatcom make file which builds pnglibconf.h - the libpng +# configuration header. You can ignore this file if you don't need to +# configure libpng; a default configuration will be built. +# +# For more information build libpng.wpj under the IDE and then read the +# generated files: +# +# config.inf: Basic configuration information for a standard build. +# pngconfig.dfa: Advanced configuration for non-standard libpng builds. +# +DELETE=rm -f +ECHO=echo +COPY=copy +# +# If your configuration needs to test compiler flags when building +# pnglibconf.h you may need to override the following on the wmake command +# line: +CFLAGS= +CC=wcl386 +CPP=$(CC) -pw0 +# +# Read awk from the environment if set, else it can be set on the command +# line (the default approach is to set the %awk% environment variable in the +# IDE libpng.wpj 'before' rule - this setting is local.) +!ifdef %awk +AWK=$(%awk) +!endif +# +# pnglibconf.h must exist in the source directory, this is the final rule +# which copies the local built version (and this is the default target for +# this makefile.) +..\..\pnglibconf.h: pnglibconf.h + $(COPY) pnglibconf.h $@ + +!ifdef AWK +# CPPFLAGS should contain the options to control the result, +# but DEFS and CFLAGS are also supported here, override +# as appropriate +DFNFLAGS = $(DEFS) $(CPPFLAGS) $(CFLAGS) + +pnglibconf.h: pnglibconf.dfn + $(DELETE) $@ dfn.c dfn1.out dfn2.out + $(ECHO) $#include "pnglibconf.dfn" >dfn.c + $(CPP) $(DFNFLAGS) dfn.c >dfn1.out + $(AWK) -f << dfn1.out >dfn2.out +/^.*PNG_DEFN_MAGIC-.*-PNG_DEFN_END.*$$/{ + sub(/^.*PNG_DEFN_MAGIC-/, "") + sub(/ *-PNG_DEFN_END.*$$/, "") + gsub(/ *@@@ */, "") + print +} +<< + $(COPY) dfn2.out $@ + @type << >pngconfig.inf +This is a locally configurable build of libpng.lib; for configuration +instructions consult and edit projects/openwatcom/pngconfig.dfa +<< + $(DELETE) dfn.c dfn1.out dfn2.out + +pnglibconf.dfn: ..\..\scripts\pnglibconf.dfa ..\..\scripts\options.awk pngconfig.dfa + $(DELETE) $@ dfn1.out dfn2.out + $(AWK) -f ..\..\scripts\options.awk out=dfn1.out ..\..\scripts\pnglibconf.dfa pngconfig.dfa $(DFA_XTRA) 1>&2 + $(AWK) -f ..\..\scripts\options.awk out=dfn2.out dfn1.out 1>&2 + $(COPY) dfn2.out $@ + $(DELETE) dfn1.out dfn2.out + +!else +# The following lines are used to copy scripts\pnglibconf.h.prebuilt and make +# the required change to the calling convention. +# +# By default libpng is built to use the __cdecl calling convention on +# Windows. This gives compatibility with MSVC and GCC. Unfortunately it +# does not work with OpenWatcom because OpenWatcom implements longjmp using +# the __watcall convention (compared with both MSVC and GCC which use __cdecl +# for library functions.) +# +# Thus the default must be changed to build on OpenWatcom and, once changed, +# the result will not be compatible with applications built using other +# compilers (in fact attempts to build will fail at compile time.) +# +pnglibconf.h: ..\..\scripts\pnglibconf.h.prebuilt .existsonly + @$(ECHO) . + @$(ECHO) . + @$(ECHO) $$(AWK) NOT AVAILABLE: COPYING scripts\pnglibconf.h.prebuilt + @$(ECHO) . + @$(ECHO) . + vi -q -k ":1,$$s/PNG_API_RULE 0$$/PNG_API_RULE 2/\n:w! $@\n:q!\n" ..\..\scripts\pnglibconf.h.prebuilt + @$(ECHO) . + @$(ECHO) . + @$(ECHO) YOU HAVE A DEFAULT CONFIGURATION BECAUSE YOU DO NOT HAVE AWK! + @$(ECHO) . + @$(ECHO) . + @type << >pngconfig.inf +This is the default configuration of libpng.lib, if you wish to +change the configuration please consult the instructions in +projects/owatcom/pngconfig.dfa. +<< + +!endif + +# Make the default files +defaults: .symbolic + @$(COPY) << config.inf +$# The libpng project is incompletely configured. To complete configuration +$# please complete the following steps: +$# +$# 1) Edit the 'before' rule of libpng.wpj (from the IDE) to define the +$# locations of the zlib include file zlib.h and the built zlib library, +$# zlib.lib. +$# +$# 2) If you want to change libpng to a non-standard configuration also +$# change the definition of 'awk' in the before rule to the name of your +$# awk command. For more instructions on configuration read +$# pngconfig.dfa. +$# +$# 3) Delete this file (config.inf). +<< + @$(COPY) << pngconfig.dfa +$# pngconfig.dfa: this file contains configuration options for libpng. +$# If emtpy the standard configuration will be built. For this file to be +$# used a working version of the program 'awk' is required and the program +$# must be identified in the 'before' rule of the project. +$# +$# If you don't already have 'awk', or the version of awk you have seems not +$# to work, download Brian Kernighan's awk (Brian Kernighan is the author of +$# awk.) You can find source code and a built executable (called awk95.exe) +$# here: +$# +$# http://www.cs.princeton.edu/~bwk/btl.mirror/ +$# +$# The executable works just fine. +$# +$# If build issues errors after a change to pngconfig.dfa you have entered +$# inconsistent feature requests, or even malformed requests, in +$# pngconfig.dfa. The error messages from awk should be comprehensible, but +$# if not simply go back to the start (nothing but comments in this file) and +$# enter configuration lines one by one until one produces an error. (Or, of +$# course, do the standard binary chop.) +$# +$# You need to rebuild everything after a change to pnglibconf.dfa - i.e. you +$# must do Actions/Mark All Targets for Remake. This is because the compiler +$# generated dependency information (as of OpenWatcom 1.9) does not record the +$# dependency on pnglibconf.h correctly. +$# +$# If awk isn't set then this file is bypassed. If you just want the standard +$# configuration it is automatically produced from the distributed version +$# (scripts\pnglibconf.h.prebuilt) by editting PNG_API_RULE to 2 (to force use +$# of the OpenWatcom library calling convention.) +$# +<< + +clean:: .symbolic + $(DELETE) ..\..\pnglibconf.h pnglibconf.* dfn.c *.out pngconfig.inf + $(DELETE) *.obj *.mbr *.sym *.err *.pch libpng.mk + $(DELETE) libpng.lib libpng.lbr libpng.lb1 libpng.cbr libpng.mk1 + $(DELETE) pngtest.exe pngtest.map pngtest.lk1 pngtest.mk1 + $(DELETE) pngvalid.exe pngvalid.map pngvalid.lk1 pngvalid.mk1 + +distclean:: clean .symbolic + $(DELETE) zlib.inf awk.inf config.inf pngconfig.dfa diff --git a/src/png/projects/owatcom/pngtest.tgt b/src/png/projects/owatcom/pngtest.tgt new file mode 100644 index 0000000000..ca3db8c3ac --- /dev/null +++ b/src/png/projects/owatcom/pngtest.tgt @@ -0,0 +1,179 @@ +40 +targetIdent +0 +MProject +1 +MComponent +0 +2 +WString +4 +NEXE +3 +WString +5 +nc2en +1 +0 +0 +4 +MCommand +0 +5 +MCommand +34 +cd ..\.. +projects\owatcom\pngtest +6 +MItem +11 +pngtest.exe +7 +WString +4 +NEXE +8 +WVList +4 +9 +MVState +10 +WString +7 +WINLINK +11 +WString +28 +?????Library directories(;): +1 +12 +WString +8 +$(%zlib) +0 +13 +MVState +14 +WString +7 +WINLINK +15 +WString +18 +?????Libraries(,): +1 +16 +WString +19 +libpng.lib zlib.lib +0 +17 +MVState +18 +WString +7 +WINLINK +19 +WString +28 +?????Library directories(;): +0 +20 +WString +8 +$(%zlib) +0 +21 +MVState +22 +WString +7 +WINLINK +23 +WString +18 +?????Libraries(,): +0 +24 +WString +19 +libpng.lib zlib.lib +0 +25 +WVList +0 +-1 +1 +1 +0 +26 +WPickList +2 +27 +MItem +3 +*.c +28 +WString +4 +COBJ +29 +WVList +2 +30 +MVState +31 +WString +3 +WCC +32 +WString +25 +n????Include directories: +1 +33 +WString +39 +"$(%zlib);$(%watcom)/h;$(%watcom)/h/nt" +0 +34 +MVState +35 +WString +3 +WCC +36 +WString +25 +n????Include directories: +0 +37 +WString +39 +"$(%zlib);$(%watcom)/h;$(%watcom)/h/nt" +0 +38 +WVList +0 +-1 +1 +1 +0 +39 +MItem +15 +..\..\pngtest.c +40 +WString +4 +COBJ +41 +WVList +0 +42 +WVList +0 +27 +1 +1 +0 diff --git a/src/png/projects/owatcom/pngvalid.tgt b/src/png/projects/owatcom/pngvalid.tgt new file mode 100644 index 0000000000..83d47490c4 --- /dev/null +++ b/src/png/projects/owatcom/pngvalid.tgt @@ -0,0 +1,210 @@ +40 +targetIdent +0 +MProject +1 +MComponent +0 +2 +WString +4 +NEXE +3 +WString +5 +nc2en +1 +0 +0 +4 +MCommand +0 +5 +MCommand +8 +pngvalid +6 +MItem +12 +pngvalid.exe +7 +WString +4 +NEXE +8 +WVList +6 +9 +MVState +10 +WString +7 +WINLINK +11 +WString +11 +?????Stack: +1 +12 +WString +4 +768k +0 +13 +MVState +14 +WString +7 +WINLINK +15 +WString +28 +?????Library directories(;): +1 +16 +WString +8 +$(%zlib) +0 +17 +MVState +18 +WString +7 +WINLINK +19 +WString +18 +?????Libraries(,): +1 +20 +WString +19 +libpng.lib zlib.lib +0 +21 +MVState +22 +WString +7 +WINLINK +23 +WString +11 +?????Stack: +0 +24 +WString +4 +768k +0 +25 +MVState +26 +WString +7 +WINLINK +27 +WString +28 +?????Library directories(;): +0 +28 +WString +8 +$(%zlib) +0 +29 +MVState +30 +WString +7 +WINLINK +31 +WString +18 +?????Libraries(,): +0 +32 +WString +19 +libpng.lib zlib.lib +0 +33 +WVList +0 +-1 +1 +1 +0 +34 +WPickList +2 +35 +MItem +3 +*.c +36 +WString +4 +COBJ +37 +WVList +2 +38 +MVState +39 +WString +3 +WCC +40 +WString +25 +n????Include directories: +1 +41 +WString +39 +"$(%zlib);$(%watcom)/h;$(%watcom)/h/nt" +0 +42 +MVState +43 +WString +3 +WCC +44 +WString +25 +n????Include directories: +0 +45 +WString +39 +"$(%zlib);$(%watcom)/h;$(%watcom)/h/nt" +0 +46 +WVList +0 +-1 +1 +1 +0 +47 +MItem +16 +..\..\pngvalid.c +48 +WString +4 +COBJ +49 +WVList +0 +50 +WVList +0 +35 +1 +1 +0 diff --git a/src/png/projects/visualc6/README.txt b/src/png/projects/visualc6/README.txt deleted file mode 100644 index 578af6c72d..0000000000 --- a/src/png/projects/visualc6/README.txt +++ /dev/null @@ -1,57 +0,0 @@ -Microsoft Developer Studio Project File, Format Version 6.00 for libpng. - -Copyright (C) 2000-2004 Simon-Pierre Cadieux. -Copyright (C) 2004 Cosmin Truta. - -This code is released under the libpng license. -For conditions of distribution and use, see copyright notice in png.h - -NOTE: This project will be removed from libpng-1.5.0. It has -been replaced with the "vstudio" project. - -Assumptions: -* The libpng source files are in ..\.. -* The zlib source files are in ..\..\..\zlib -* The zlib project files are in ..\..\..\zlib\projects\visualc6 - - -To use: - -1) On the main menu, select "File | Open Workspace". - Open "libpng.dsw". - -2) Select "Build | Set Active Configuration". - Choose the configuration you wish to build. - (Choose libpng or pngtest; zlib will be built automatically.) - -3) Select "Build | Clean". - -4) Select "Build | Build ... (F7)". Ignore warning messages about - not being able to find certain include files (e.g. alloc.h). - -5) If you built the sample program (pngtest), - select "Build | Execute ... (Ctrl+F5)". - - -This project builds the libpng binaries as follows: - -* Win32_DLL_Release\libpng14.dll DLL build -* Win32_DLL_Debug\libpng14d.dll DLL build (debug version) -* Win32_DLL_VB\libpng14vb.dll DLL build for Visual Basic, using stdcall -* Win32_LIB_Release\libpng.lib static build -* Win32_LIB_Debug\libpngd.lib static build (debug version) - - -Notes: - -If you change anything in the source files, or select different compiler -settings, please change the DLL name to something different than any of -the above names. Also, make sure that in your "pngusr.h" you define -PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX according to the -instructions provided in "pngconf.h". - -All DLLs built by this project use the Microsoft dynamic C runtime library -MSVCRT.DLL (MSVCRTD.DLL for debug versions). If you distribute any of the -above mentioned libraries you should also include this DLL in your package. -For a list of files that are redistributable in Visual C++ 6.0, see -Common\Redist\Redist.txt on Disc 1 of the Visual C++ 6.0 product CDs. diff --git a/src/png/projects/visualc6/libpng.dsp b/src/png/projects/visualc6/libpng.dsp deleted file mode 100644 index 6704255ab8..0000000000 --- a/src/png/projects/visualc6/libpng.dsp +++ /dev/null @@ -1,328 +0,0 @@ -# Microsoft Developer Studio Project File - Name="libpng" - Package Owner=<4> -# Microsoft Developer Studio Generated Build File, Format Version 6.00 -# ** DO NOT EDIT ** - -# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102 -# TARGTYPE "Win32 (x86) Static Library" 0x0104 - -CFG=libpng - Win32 DLL Release -!MESSAGE This is not a valid makefile. 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-SOURCE=..\..\scripts\pngwin.rc - -!IF "$(CFG)" == "libpng - Win32 DLL Release" - -!ELSEIF "$(CFG)" == "libpng - Win32 DLL Debug" - -!ELSEIF "$(CFG)" == "libpng - Win32 DLL VB" - -!ELSEIF "$(CFG)" == "libpng - Win32 LIB Release" - -# PROP Exclude_From_Build 1 - -!ELSEIF "$(CFG)" == "libpng - Win32 LIB Debug" - -# PROP Exclude_From_Build 1 - -!ENDIF - -# End Source File -# End Group -# Begin Source File - -SOURCE=.\README.txt -# End Source File -# End Target -# End Project diff --git a/src/png/projects/visualc6/libpng.dsw b/src/png/projects/visualc6/libpng.dsw deleted file mode 100644 index 2a98646748..0000000000 --- a/src/png/projects/visualc6/libpng.dsw +++ /dev/null @@ -1,59 +0,0 @@ -Microsoft Developer Studio Workspace File, Format Version 6.00 -# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE! - -############################################################################### - -Project: "libpng"=".\libpng.dsp" - Package Owner=<4> - -Package=<5> -{{{ -}}} - -Package=<4> -{{{ - Begin Project Dependency - Project_Dep_Name zlib - End Project Dependency -}}} - -############################################################################### - -Project: "pngtest"=".\pngtest.dsp" - Package Owner=<4> - -Package=<5> -{{{ -}}} - -Package=<4> -{{{ - Begin Project Dependency - Project_Dep_Name libpng - End Project Dependency -}}} - -############################################################################### - -Project: "zlib"="..\..\..\zlib\projects\visualc6\zlib.dsp" - Package Owner=<4> - -Package=<5> -{{{ -}}} - -Package=<4> -{{{ -}}} - -############################################################################### - -Global: - -Package=<5> -{{{ -}}} - -Package=<3> -{{{ -}}} - -############################################################################### - diff --git a/src/png/projects/visualc6/pngtest.dsp b/src/png/projects/visualc6/pngtest.dsp deleted file mode 100644 index d3cb0682cb..0000000000 --- a/src/png/projects/visualc6/pngtest.dsp +++ /dev/null @@ -1,178 +0,0 @@ -# Microsoft Developer Studio Project File - Name="pngtest" - Package Owner=<4> -# Microsoft Developer Studio Generated Build File, Format Version 6.00 -# ** DO NOT EDIT ** - -# TARGTYPE "Win32 (x86) Console Application" 0x0103 - -CFG=pngtest - Win32 DLL Release -!MESSAGE This is not a valid makefile. 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"Win32_DLL_Release" -# PROP Ignore_Export_Lib 0 -# PROP Target_Dir "" -# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c -# SUBTRACT BASE CPP /YX -# ADD CPP /nologo /MD /W3 /O2 /I "..\..\..\zlib" /D "WIN32" /D "NDEBUG" /D "PNG_DLL" /D "PNG_NO_STDIO" /FD /c -# SUBTRACT CPP /YX -# ADD BASE RSC /l 0x409 /d "NDEBUG" -# ADD RSC /l 0x409 /d "NDEBUG" -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LINK32=link.exe -# ADD BASE LINK32 /nologo /subsystem:console /machine:I386 -# ADD LINK32 Win32_DLL_Release\libpng14.lib ..\..\..\zlib\projects\visualc6\Win32_DLL_Release\zlib1.lib /nologo /subsystem:console /machine:I386 -# Begin Special Build Tool -OutDir=.\Win32_DLL_Release -SOURCE="$(InputPath)" -PostBuild_Desc=[Run Test] -PostBuild_Cmds=set path=$(outdir);..\..\..\zlib\projects\visualc6\Win32_DLL_Release; $(outdir)\pngtest.exe ..\..\pngtest.png -# End Special Build Tool - -!ELSEIF "$(CFG)" == "pngtest - Win32 DLL Debug" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 1 -# PROP BASE Output_Dir "pngtest___Win32_DLL_Debug" -# PROP BASE Intermediate_Dir "pngtest___Win32_DLL_Debug" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 1 -# PROP Output_Dir "Win32_DLL_Debug" -# PROP Intermediate_Dir "Win32_DLL_Debug" -# PROP Ignore_Export_Lib 0 -# PROP Target_Dir "" -# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c -# SUBTRACT BASE CPP /YX -# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /D "PNG_DLL" /D "PNG_NO_STDIO" /FD /GZ /c -# SUBTRACT CPP /YX -# ADD BASE RSC /l 0x409 /d "_DEBUG" -# ADD RSC /l 0x409 /d "_DEBUG" -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LINK32=link.exe -# ADD BASE LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept -# ADD LINK32 Win32_DLL_Debug\libpng14d.lib ..\..\..\zlib\projects\visualc6\Win32_DLL_Debug\zlib1d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept -# Begin Special Build Tool -OutDir=.\Win32_DLL_Debug -SOURCE="$(InputPath)" -PostBuild_Desc=[Run Test] -PostBuild_Cmds=set path=$(outdir);..\..\..\zlib\projects\visualc6\Win32_DLL_Debug; $(outdir)\pngtest.exe ..\..\pngtest.png -# End Special Build Tool - -!ELSEIF "$(CFG)" == "pngtest - Win32 LIB Release" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 0 -# PROP BASE Output_Dir "pngtest___Win32_LIB_Release" -# PROP BASE Intermediate_Dir "pngtest___Win32_LIB_Release" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 0 -# PROP Output_Dir "Win32_LIB_Release" -# PROP Intermediate_Dir "Win32_LIB_Release" -# PROP Ignore_Export_Lib 0 -# PROP Target_Dir "" -# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c -# SUBTRACT BASE CPP /YX -# ADD CPP /nologo /MD /W3 /O2 /I "..\..\..\zlib" /D "WIN32" /D "NDEBUG" /FD /c -# SUBTRACT CPP /YX -# ADD BASE RSC /l 0x409 /d "NDEBUG" -# ADD RSC /l 0x409 /d "NDEBUG" -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LINK32=link.exe -# ADD BASE LINK32 /nologo /subsystem:console /machine:I386 -# ADD LINK32 Win32_LIB_Release\libpng.lib ..\..\..\zlib\projects\visualc6\Win32_LIB_Release\zlib.lib /nologo /subsystem:console /machine:I386 -# Begin Special Build Tool -OutDir=.\Win32_LIB_Release -SOURCE="$(InputPath)" -PostBuild_Desc=[Run Test] -PostBuild_Cmds=$(outdir)\pngtest.exe ..\..\pngtest.png -# End Special Build Tool - -!ELSEIF "$(CFG)" == "pngtest - Win32 LIB Debug" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 1 -# PROP BASE Output_Dir "pngtest___Win32_LIB_Debug" -# PROP BASE Intermediate_Dir "pngtest___Win32_LIB_Debug" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 1 -# PROP Output_Dir "Win32_LIB_Debug" -# PROP Intermediate_Dir "Win32_LIB_Debug" -# PROP Ignore_Export_Lib 0 -# PROP Target_Dir "" -# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c -# SUBTRACT BASE CPP /YX -# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /FD /GZ /c -# SUBTRACT CPP /YX -# ADD BASE RSC /l 0x409 /d "_DEBUG" -# ADD RSC /l 0x409 /d "_DEBUG" -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LINK32=link.exe -# ADD BASE LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept -# ADD LINK32 Win32_LIB_Debug\libpngd.lib ..\..\..\zlib\projects\visualc6\Win32_LIB_Debug\zlibd.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept -# Begin Special Build Tool -OutDir=.\Win32_LIB_Debug -SOURCE="$(InputPath)" -PostBuild_Desc=[Run Test] -PostBuild_Cmds=$(outdir)\pngtest.exe ..\..\pngtest.png -# End Special Build Tool - -!ENDIF - -# Begin Target - -# Name "pngtest - Win32 DLL Release" -# Name "pngtest - Win32 DLL Debug" -# Name "pngtest - Win32 LIB Release" -# Name "pngtest - Win32 LIB Debug" -# Begin Group "Source Files" - -# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat" -# Begin Source File - -SOURCE=..\..\pngtest.c -# End Source File -# End Group -# End Target -# End Project diff --git a/src/png/projects/visualc71/PRJ0041.mak b/src/png/projects/visualc71/PRJ0041.mak index e15e12b55f..c7a68b503e 100644 --- a/src/png/projects/visualc71/PRJ0041.mak +++ b/src/png/projects/visualc71/PRJ0041.mak @@ -9,7 +9,7 @@ all: $(IntDir)\alloc.h \ $(IntDir)\strings.h \ $(IntDir)\unistd.h \ $(IntDir)\unixio.h - + $(IntDir)\alloc.h \ $(IntDir)\fp.h \ $(IntDir)\m68881.h \ diff --git a/src/png/projects/visualc71/README.txt b/src/png/projects/visualc71/README.txt index 755a82a24d..625eefcab7 100644 --- a/src/png/projects/visualc71/README.txt +++ b/src/png/projects/visualc71/README.txt @@ -37,9 +37,9 @@ To use: This project builds the libpng binaries as follows: -* Win32_DLL_Release\libpng14.dll DLL build -* Win32_DLL_Debug\libpng14d.dll DLL build (debug version) -* Win32_DLL_VB\libpng14vb.dll DLL build for Visual Basic, using stdcall +* Win32_DLL_Release\libpng15.dll DLL build +* Win32_DLL_Debug\libpng15d.dll DLL build (debug version) +* Win32_DLL_VB\libpng15vb.dll DLL build for Visual Basic, using stdcall * Win32_LIB_Release\libpng.lib static build * Win32_LIB_Debug\libpngd.lib static build (debug version) diff --git a/src/png/projects/visualc71/libpng.vcproj b/src/png/projects/visualc71/libpng.vcproj index e08346b763..e17f4f7a8d 100644 --- a/src/png/projects/visualc71/libpng.vcproj +++ b/src/png/projects/visualc71/libpng.vcproj @@ -17,35 +17,35 @@ + OutputFile="$(OutDir)/libpng15.dll" + LinkIncremental="1"/> + Name="VCPreBuildEventTool" + CommandLine="copy ..\..\scripts\pnglibconf.h.prebuilt ..\..\pnglibconf.h"/> + AdditionalIncludeDirectories="..\..;..\..\..\zlib;$(IntDir)"/> @@ -78,22 +78,22 @@ Name="VCCustomBuildTool"/> + Name="VCPreBuildEventTool" + CommandLine="copy ..\..\scripts\pnglibconf.h.prebuilt ..\..\pnglibconf.h"/> + AdditionalIncludeDirectories="..\..;..\..\..\zlib;$(IntDir)"/> + Name="VCPreBuildEventTool" + CommandLine="copy ..\..\scripts\pnglibconf.h.prebuilt ..\..\pnglibconf.h"/> + AdditionalIncludeDirectories="..\..;..\..\..\zlib;$(IntDir)"/> + Name="VCPreBuildEventTool" + CommandLine="copy ..\..\scripts\pnglibconf.h.prebuilt ..\..\pnglibconf.h"/> @@ -221,7 +223,8 @@ + Name="VCPreBuildEventTool" + CommandLine="copy ..\..\scripts\pnglibconf.h.prebuilt ..\..\pnglibconf.h"/> - - - - - - - - - - - diff --git a/src/png/projects/visualc71/pngtest.vcproj b/src/png/projects/visualc71/pngtest.vcproj index 01a3402948..ac82ff9b7d 100644 --- a/src/png/projects/visualc71/pngtest.vcproj +++ b/src/png/projects/visualc71/pngtest.vcproj @@ -130,7 +130,7 @@ $(TargetPath) ..\..\pngtest.png $(IntDir)\pngout.png" Name="VCLinkerTool" OutputFile="$(OutDir)/pngtest.exe" LinkIncremental="1" - IgnoreDefaultLibraryNames="$(IntDir)\libpng14b.lib" + IgnoreDefaultLibraryNames="$(IntDir)\libpng15b.lib" SubSystem="1" TargetMachine="1"/> - - - - Debug Library - Win32 - - - Debug - Win32 - - - Release Library - Win32 - - - Release - Win32 - - - - {D6973076-9317-4EF2-A0B8-B7A18AC0713E} - Win32Proj - libpng - - - - - DynamicLibrary - MultiByte - true - - - StaticLibrary - MultiByte - - - DynamicLibrary - true - MultiByte - - - StaticLibrary - MultiByte - - - - - - - - - - - - - - - - - - - false - - - $(ProjectName)14 - - - false - - $(ProjectName)14 - - - false - - - $(ProjectName)14 - - - false - - $(ProjectName)14 - - - - NotUsing - Level4 - false - ProgramDatabase - EnableFastChecks - MultiThreadedDebugDLL - WIN32;PNG_BUILD_DLL;PNG_NO_MODULEDEF;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions) - true - true - false - false - png.h - true - CompileAsC - true - 4996;4127 - $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) - true - Disabled - - - Windows - true - zlib.lib;msvcrtd.lib;kernel32.lib - true - 14 - $(OutDir) - - - - - NotUsing - Level4 - false - ProgramDatabase - Disabled - EnableFastChecks - MultiThreadedDebugDLL - WIN32;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions) - true - true - false - false - png.h - true - CompileAsC - true - 4996;4127 - $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) - true - - - Windows - true - - - - - Level4 - NotUsing - ProgramDatabase - MultiThreadedDLL - true - true - WIN32;PNG_BUILD_DLL;PNG_NO_MODULEDEF;NDEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions) - false - false - png.h - true - CompileAsC - true - false - 4996;4127 - $(ZLib1Dir);..\..\..\scripts;%(AdditionalIncludeDirectories) - true - Full - - - Windows - true - true - true - zdll.lib;msvcrt.lib;kernel32.lib - true - 14 - $(ZLib1Dir) - - - - - Level4 - NotUsing - ProgramDatabase - MultiThreadedDLL - true - true - WIN32;NDEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions) - false - false - png.h - true - CompileAsC - true - false - 4996;4127 - $(ZLib1Dir);..\..\..\scripts;%(AdditionalIncludeDirectories) - true - Full - - - Windows - true - true - true - - - - - Create - Create - Create - Create - - - - - - - - - - - - - - - - - - - true - true - - - - - - + + + + + Debug Library + Win32 + + + Debug + Win32 + + + Release Library + Win32 + + + Release + Win32 + + + + {D6973076-9317-4EF2-A0B8-B7A18AC0713E} + Win32Proj + libpng + + + + + DynamicLibrary + MultiByte + true + + + StaticLibrary + MultiByte + + + DynamicLibrary + true + MultiByte + + + StaticLibrary + MultiByte + + + + + + + + + + + + + + + + + + + false + + + $(ProjectName)15 + + + false + + $(ProjectName)15 + + + false + + + $(ProjectName)15 + + + false + + $(ProjectName)15 + + + + Use + Level4 + false + ProgramDatabase + EnableFastChecks + WIN32;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions) + true + true + false + false + pngpriv.h + true + CompileAsC + true + 4996;4127 + $(ZLibSrcDir);%(AdditionalIncludeDirectories) + true + Disabled + + + Windows + true + zlib.lib + 15 + $(OutDir) + + + + + Use + Level4 + false + ProgramDatabase + Disabled + EnableFastChecks + WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions) + true + true + false + false + pngpriv.h + true + CompileAsC + true + 4996;4127 + $(ZLibSrcDir);%(AdditionalIncludeDirectories) + true + MultiThreadedDebug + + + Windows + true + + + + + Level4 + Use + ProgramDatabase + true + true + WIN32;NDEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions) + false + false + pngpriv.h + true + CompileAsC + true + false + 4996;4127 + $(ZLibSrcDir);%(AdditionalIncludeDirectories) + true + Full + + + Windows + true + true + true + zlib.lib + 15 + $(OutDir) + + + + + Level4 + Use + ProgramDatabase + MultiThreaded + true + true + WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions) + false + false + pngpriv.h + true + CompileAsC + true + false + 4996;4127 + $(ZLibSrcDir);%(AdditionalIncludeDirectories) + true + Full + true + + + Windows + true + true + true + + + true + + + + + Create + Create + Create + Create + + + + + + + + + + + + + + + + + + + true + true + + + + + + diff --git a/src/png/projects/vstudio/pnglibconf/pnglibconf.vcxproj b/src/png/projects/vstudio/pnglibconf/pnglibconf.vcxproj new file mode 100644 index 0000000000..58ee99758d --- /dev/null +++ b/src/png/projects/vstudio/pnglibconf/pnglibconf.vcxproj @@ -0,0 +1,60 @@ + + + + + Release + Win32 + + + + {EB33566E-DA7F-4D28-9077-88C0B7C77E35} + pnglibconf + + + + Application + false + true + MultiByte + + + + + + + + + + Build + + + + Level3 + MaxSpeed + true + true + + + true + true + true + + + copy ..\..\..\scripts\pnglibconf.h.prebuilt ..\..\..\pnglibconf.h + + + Generating pnglibconf.h + + + ..\..\..\pnglibconf.h + + + ..\..\..\scripts\pnglibconf.h.prebuilt + + + + + + + + diff --git a/src/png/projects/vstudio/pngtest/pngtest.vcxproj b/src/png/projects/vstudio/pngtest/pngtest.vcxproj index bdc4690139..bdbd8392bc 100644 --- a/src/png/projects/vstudio/pngtest/pngtest.vcxproj +++ b/src/png/projects/vstudio/pngtest/pngtest.vcxproj @@ -1,217 +1,219 @@ - - - - - Debug Library - Win32 - - - Debug - Win32 - - - Release Library - Win32 - - - Release - Win32 - - - - {228BA965-50D5-42B2-8BCF-AFCC227E3C1D} - Win32Proj - pngtest - - - - - Application - Unicode - - - Application - Unicode - - - Application - Unicode - - - Application - Unicode - - - - - - - - - - - - - - - - - - - false - - - - false - - - - false - - - - false - - - - - NotUsing - Level4 - false - ProgramDatabase - Disabled - EnableFastChecks - MultiThreadedDebugDLL - WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions) - $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) - 4996 - false - true - true - true - false - true - - - Console - true - libpng14.lib;zlib.lib;msvcrtd.lib;kernel32.lib - true - $(OutDir) - - - Executing PNG test program - "$(OutDir)pngtest.exe" ..\..\..\pngtest.png "$(IntDir)pngout.png" - $(IntDir)pngout.png - ..\..\..\pngtest.png;$(OutDir)pngtest.exe - - - - - NotUsing - Level4 - false - ProgramDatabase - Disabled - EnableFastChecks - MultiThreadedDebugDLL - WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions) - $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) - 4996 - false - true - true - true - false - true - - - Console - true - libpng14.lib;zlib.lib;msvcrtd.lib;kernel32.lib - true - $(OutDir) - - - Executing PNG test program - "$(OutDir)pngtest.exe" ..\..\..\pngtest.png "$(IntDir)pngout.png" - $(IntDir)pngout.png - ..\..\..\pngtest.png;$(OutDir)pngtest.exe - - - - - Level4 - NotUsing - ProgramDatabase - Full - MultiThreadedDLL - false - true - WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions) - $(ZLib1Dir);..\..\..\scripts;%(AdditionalIncludeDirectories) - 4996 - false - true - true - false - true - - - Console - true - true - true - libpng14.lib;msvcrt.lib;kernel32.lib - true - $(OutDir) - - - Executing PNG test program - "$(OutDir)pngtest.exe" ..\..\..\pngtest.png "$(IntDir)pngout.png" - $(IntDir)pngout.png - ..\..\..\pngtest.png;$(OutDir)pngtest.exe - - - - - Level4 - NotUsing - ProgramDatabase - Full - MultiThreadedDLL - false - true - WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions) - $(ZLib1Dir);..\..\..\scripts;%(AdditionalIncludeDirectories) - 4996 - false - true - true - false - true - - - Console - true - true - true - libpng14.lib;zlib.lib;msvcrt.lib;kernel32.lib - true - $(OutDir);$(ZLib1Dir) - - - Executing PNG test program - $(OutDir)pngtest.exe ..\..\..\pngtest.png $(IntDir)pngout.png - "$(OutDir)pngtest.exe" ..\..\..\pngtest.png "$(IntDir)pngout.png" - $(IntDir)pngout.png - ..\..\..\pngtest.png;$(OutDir)pngtest.exe - - - - - - - - - + + + + + Debug Library + Win32 + + + Debug + Win32 + + + Release Library + Win32 + + + Release + Win32 + + + + {228BA965-50D5-42B2-8BCF-AFCC227E3C1D} + Win32Proj + pngtest + + + + + Application + Unicode + + + Application + Unicode + + + Application + Unicode + + + Application + Unicode + + + + + + + + + + + + + + + + + + + false + + + + false + + + + false + + + + false + + + + + NotUsing + Level4 + false + ProgramDatabase + Disabled + EnableFastChecks + WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996 + false + true + true + true + false + true + false + + + Console + true + libpng15.lib + $(OutDir) + + + Executing PNG test program + "$(OutDir)pngtest.exe" ..\..\..\pngtest.png "$(IntDir)pngout.png" + $(IntDir)pngout.png + ..\..\..\pngtest.png;$(OutDir)pngtest.exe + + + + + NotUsing + Level4 + false + ProgramDatabase + Disabled + EnableFastChecks + MultiThreadedDebug + WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996 + false + true + true + true + false + true + false + + + Console + true + libpng15.lib;zlib.lib + $(OutDir) + + + Executing PNG test program + "$(OutDir)pngtest.exe" ..\..\..\pngtest.png "$(IntDir)pngout.png" + $(IntDir)pngout.png + ..\..\..\pngtest.png;$(OutDir)pngtest.exe + + + + + Level4 + NotUsing + ProgramDatabase + Full + false + true + WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996 + false + true + true + false + true + true + false + + + Console + true + true + true + UseLinkTimeCodeGeneration + libpng15.lib + $(OutDir) + + + Executing PNG test program + "$(OutDir)pngtest.exe" ..\..\..\pngtest.png "$(IntDir)pngout.png" + $(IntDir)pngout.png + ..\..\..\pngtest.png;$(OutDir)pngtest.exe + + + + + Level4 + NotUsing + ProgramDatabase + Full + MultiThreaded + false + true + WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996 + false + true + true + false + true + true + false + + + Console + true + true + true + libpng15.lib;zlib.lib + UseLinkTimeCodeGeneration + $(OutDir) + + + Executing PNG test program + $(OutDir)pngtest.exe ..\..\..\pngtest.png $(IntDir)pngout.png + "$(OutDir)pngtest.exe" ..\..\..\pngtest.png "$(IntDir)pngout.png" + $(IntDir)pngout.png + ..\..\..\pngtest.png;$(OutDir)pngtest.exe + + + + + + + + + diff --git a/src/png/projects/vstudio/pngvalid/pngvalid.vcxproj b/src/png/projects/vstudio/pngvalid/pngvalid.vcxproj new file mode 100644 index 0000000000..ea5f30a61f --- /dev/null +++ b/src/png/projects/vstudio/pngvalid/pngvalid.vcxproj @@ -0,0 +1,219 @@ + + + + + Debug Library + Win32 + + + Debug + Win32 + + + Release Library + Win32 + + + Release + Win32 + + + + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8} + Win32Proj + pngvalid + + + + + Application + Unicode + + + Application + Unicode + + + Application + Unicode + + + Application + Unicode + + + + + + + + + + + + + + + + + + + false + + + + false + + + + false + + + + false + + + + + NotUsing + Level4 + false + ProgramDatabase + Disabled + EnableFastChecks + WIN32;_DEBUG;_CONSOLE;PNG_USE_DLL;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996;4127 + false + true + true + true + false + true + false + + + Console + true + libpng15.lib;zlib.lib + $(OutDir) + + + Executing PNG validation program + "$(OutDir)pngvalid.exe" --touch "$(IntDir)pngvalid.out" + $(IntDir)pngvalid.out + $(OutDir)pngvalid.exe + + + + + NotUsing + Level4 + false + ProgramDatabase + Disabled + EnableFastChecks + MultiThreadedDebug + WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996;4127 + false + true + true + true + false + true + false + + + Console + true + libpng15.lib;zlib.lib + $(OutDir) + + + Executing PNG validation program + "$(OutDir)pngvalid.exe" --touch "$(IntDir)pngvalid.out" + $(IntDir)pngvalid.out + $(OutDir)pngvalid.exe + + + + + Level4 + NotUsing + ProgramDatabase + Full + false + true + WIN32;NDEBUG;_CONSOLE;PNG_USE_DLL;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996;4127 + false + true + true + false + true + true + false + + + Console + true + true + true + libpng15.lib;zlib.lib + $(OutDir) + UseLinkTimeCodeGeneration + + + Executing PNG validation program + "$(OutDir)pngvalid.exe" --touch "$(IntDir)pngvalid.out" + $(IntDir)pngvalid.out + $(OutDir)pngvalid.exe + + + + + Level4 + NotUsing + ProgramDatabase + Full + MultiThreaded + false + true + WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions) + $(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories) + 4996;4127 + false + true + true + false + true + true + false + + + Console + true + true + true + libpng15.lib;zlib.lib + $(OutDir) + UseLinkTimeCodeGeneration + + + Executing PNG validation program + $(OutDir)pngvalid.exe ..\..\..\pngvalid.png $(IntDir)pngout.png + "$(OutDir)pngvalid.exe" --touch "$(IntDir)pngvalid.out" + $(IntDir)pngvalid.out + $(OutDir)pngvalid.exe + + + + + + + + + diff --git a/src/png/projects/vstudio/readme.txt b/src/png/projects/vstudio/readme.txt index ccdded3d3b..c00f48ce0c 100644 --- a/src/png/projects/vstudio/readme.txt +++ b/src/png/projects/vstudio/readme.txt @@ -1,7 +1,7 @@ VisualStudio instructions -libpng version 1.4.4 - September 23, 2010 +libpng version 1.5.6 - November 3, 2011 Copyright (c) 1998-2010 Glenn Randers-Pehrson @@ -13,29 +13,13 @@ This directory contains support for building libpng under MicroSoft VisualStudio 2010. It may also work under later versions of VisualStudio. You should be familiar with VisualStudio before using this directory. -This is a slightly modified copy of the 'vstudio' solution from libpng -1.5; it is intended to provide compatibility for libpng 1.4 with later -releases of zlib (from 1.2.4) and to provide a migration aid for 1.5. - -A 'VB' DLL is no longer produced - use the standard 'Release' DLL. - Initial preparations ==================== -You should install the 'official' build of zlib on your system - follow the -instructions provided on http://www.zlib.net. When a new release is being -made of zlib the instructions disappear for a while until the new official -build is available. You will have to wait. - You must enter some information in zlib.props before attempting to build with this 'solution'. Please read and edit zlib.props first. You will probably not be familiar with the contents of zlib.props - do not worry, it is mostly harmless. -Make sure that your official build layout matches the requirements listed -in zlib.props. Prior to zlib-1.2.4 the official build (1.2.3) placed -include and library files in different directories - if you find this -has happened just put them all in the same directory. - This is all you need to do to build the 'release' and 'release library' configurations. @@ -46,6 +30,25 @@ information is produced (in the .pdb), but if you encounter a problem the optimization may make it difficult to debug. Simply rebuild with a lower optimization level (e.g. /Od.) +Linking your application +======================== +Normally you should link against the 'release' configuration. This builds a +DLL for libpng 1.5 with the default runtime options used by Visual Studio +2010. In particular the runtime library is the "MultiThreaded DLL" version. +If you use Visual Studio defaults to build your application you will have no +problems. + +If you don't use the Visual Studio defaults your application must still be built +with the default runtime option (/MD). If, for some reason, it is not then your +application will crash inside libpng15.dll as soon as libpng tries to read +from a file handle you pass in. + +If you do not want to use the DLL, for example for a very small application, +the 'release library' configuration may be more appropriate. This is built +with a non-standard runtime library - the "MultiThreaded" version. When you +build your application it must be compiled with this option (/MT), otherwise +it will not build (if you are lucky) or crash (if you are not.) + Stop reading here ================= You have enough information to build a working application. @@ -57,37 +60,5 @@ do not need these unless your own solution itself uses debug builds (it is far more effective to debug on the release builds, there is no point building a special debug build.) -If, despite the previous paragraph, you still feel you need a debug build you -will have to download the zlib source as well (http://www.zlib.net) and include -the directory where you unpack it in zlib.props. This solution will then be -able to build a minimal zlib sufficient for libpng. This build is only -suitable for making a debug libpng. - The debug build of libpng is minimally supported. Support for debug builds of zlib is also minimal. You really don't want to do this. - -This solution only supports the Multi-Threaded DLL C Runtime -============================================================ -If you examine the solution you will find that it very deliberately lists -exactly which MicroSoft DLLs it is linking against. It explicitly links -against msvcrt.lib. The debug version links against msvcrtd.lib (this is -why it is a debug version - it's nothing to do with having any special -debug support, it doesn't). - -These versions of the MicroSoft C runtime correspond to the compiler flags -/MD (release) and /MDd (debug) - the "Multi-Threaded DLL" implementation of the -C runtime library. - -If you need to change this then you will have to make sure that both the -compiler flags and the ".lib" in the linker dependences match up. Fortunately -neither zlib nor libpng require libraries other than a C runtime and -kernel32. - -You cannot pass (FILE*) objects from a different runtime (including msvcrtd -to msvcrt) to libpng. If you do then your program will crash within libpng -when it first makes a file read or write call. - -It is likely if you have read this far that you have found you can't avoid -having multiple C runtimes in your program. This is OK, it does work, but -you will have to implement the libpng file read/write callbacks rather than -using the internal libpng default. This is easy. diff --git a/src/png/projects/vstudio/vstudio.sln b/src/png/projects/vstudio/vstudio.sln index 67b89c91de..115db4d95d 100644 --- a/src/png/projects/vstudio/vstudio.sln +++ b/src/png/projects/vstudio/vstudio.sln @@ -1,16 +1,28 @@ Microsoft Visual Studio Solution File, Format Version 11.00 -# Visual C++ Express 2010 +# Visual Studio 2010 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libpng", "libpng\libpng.vcxproj", "{D6973076-9317-4EF2-A0B8-B7A18AC0713E}" ProjectSection(ProjectDependencies) = postProject - {18040998-CC22-2BAE-FE7A-C0A3038F1D5C} = {18040998-CC22-2BAE-FE7A-C0A3038F1D5C} + {64CE4900-97EA-2DD5-4226-F2E36FFF2867} = {64CE4900-97EA-2DD5-4226-F2E36FFF2867} + {EB33566E-DA7F-4D28-9077-88C0B7C77E35} = {EB33566E-DA7F-4D28-9077-88C0B7C77E35} EndProjectSection EndProject Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pngtest", "pngtest\pngtest.vcxproj", "{228BA965-50D5-42B2-8BCF-AFCC227E3C1D}" ProjectSection(ProjectDependencies) = postProject + {64CE4900-97EA-2DD5-4226-F2E36FFF2867} = {64CE4900-97EA-2DD5-4226-F2E36FFF2867} + {EB33566E-DA7F-4D28-9077-88C0B7C77E35} = {EB33566E-DA7F-4D28-9077-88C0B7C77E35} {D6973076-9317-4EF2-A0B8-B7A18AC0713E} = {D6973076-9317-4EF2-A0B8-B7A18AC0713E} EndProjectSection EndProject -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlib", "zlib\zlib.vcxproj", "{18040998-CC22-2BAE-FE7A-C0A3038F1D5C}" +Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlib", "zlib\zlib.vcxproj", "{64CE4900-97EA-2DD5-4226-F2E36FFF2867}" +EndProject +Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pngvalid", "pngvalid\pngvalid.vcxproj", "{9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}" + ProjectSection(ProjectDependencies) = postProject + {64CE4900-97EA-2DD5-4226-F2E36FFF2867} = {64CE4900-97EA-2DD5-4226-F2E36FFF2867} + {EB33566E-DA7F-4D28-9077-88C0B7C77E35} = {EB33566E-DA7F-4D28-9077-88C0B7C77E35} + {D6973076-9317-4EF2-A0B8-B7A18AC0713E} = {D6973076-9317-4EF2-A0B8-B7A18AC0713E} + EndProjectSection +EndProject +Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pnglibconf", "pnglibconf\pnglibconf.vcxproj", "{EB33566E-DA7F-4D28-9077-88C0B7C77E35}" EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution @@ -36,12 +48,30 @@ Global {228BA965-50D5-42B2-8BCF-AFCC227E3C1D}.Release Library|Win32.Build.0 = Release Library|Win32 {228BA965-50D5-42B2-8BCF-AFCC227E3C1D}.Release|Win32.ActiveCfg = Release|Win32 {228BA965-50D5-42B2-8BCF-AFCC227E3C1D}.Release|Win32.Build.0 = Release|Win32 - {18040998-CC22-2BAE-FE7A-C0A3038F1D5C}.Debug Library|Win32.ActiveCfg = Debug Library|Win32 - {18040998-CC22-2BAE-FE7A-C0A3038F1D5C}.Debug Library|Win32.Build.0 = Debug Library|Win32 - {18040998-CC22-2BAE-FE7A-C0A3038F1D5C}.Debug|Win32.ActiveCfg = Debug|Win32 - {18040998-CC22-2BAE-FE7A-C0A3038F1D5C}.Debug|Win32.Build.0 = Debug|Win32 - {18040998-CC22-2BAE-FE7A-C0A3038F1D5C}.Release Library|Win32.ActiveCfg = Debug|Win32 - {18040998-CC22-2BAE-FE7A-C0A3038F1D5C}.Release|Win32.ActiveCfg = Debug|Win32 + {64CE4900-97EA-2DD5-4226-F2E36FFF2867}.Debug Library|Win32.ActiveCfg = Debug Library|Win32 + {64CE4900-97EA-2DD5-4226-F2E36FFF2867}.Debug Library|Win32.Build.0 = Debug Library|Win32 + {64CE4900-97EA-2DD5-4226-F2E36FFF2867}.Debug|Win32.ActiveCfg = Debug|Win32 + {64CE4900-97EA-2DD5-4226-F2E36FFF2867}.Debug|Win32.Build.0 = Debug|Win32 + {64CE4900-97EA-2DD5-4226-F2E36FFF2867}.Release Library|Win32.ActiveCfg = Release Library|Win32 + {64CE4900-97EA-2DD5-4226-F2E36FFF2867}.Release Library|Win32.Build.0 = Release Library|Win32 + {64CE4900-97EA-2DD5-4226-F2E36FFF2867}.Release|Win32.ActiveCfg = Release|Win32 + {64CE4900-97EA-2DD5-4226-F2E36FFF2867}.Release|Win32.Build.0 = Release|Win32 + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}.Debug Library|Win32.ActiveCfg = Debug Library|Win32 + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}.Debug Library|Win32.Build.0 = Debug Library|Win32 + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}.Debug|Win32.ActiveCfg = Debug|Win32 + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}.Debug|Win32.Build.0 = Debug|Win32 + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}.Release Library|Win32.ActiveCfg = Release Library|Win32 + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}.Release Library|Win32.Build.0 = Release Library|Win32 + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}.Release|Win32.ActiveCfg = Release|Win32 + {9B36B6FE-7FC0-434F-A71F-BBEF8099F1D8}.Release|Win32.Build.0 = Release|Win32 + {EB33566E-DA7F-4D28-9077-88C0B7C77E35}.Debug Library|Win32.ActiveCfg = Release|Win32 + {EB33566E-DA7F-4D28-9077-88C0B7C77E35}.Debug Library|Win32.Build.0 = Release|Win32 + {EB33566E-DA7F-4D28-9077-88C0B7C77E35}.Debug|Win32.ActiveCfg = Release|Win32 + {EB33566E-DA7F-4D28-9077-88C0B7C77E35}.Debug|Win32.Build.0 = Release|Win32 + {EB33566E-DA7F-4D28-9077-88C0B7C77E35}.Release Library|Win32.ActiveCfg = Release|Win32 + {EB33566E-DA7F-4D28-9077-88C0B7C77E35}.Release Library|Win32.Build.0 = Release|Win32 + {EB33566E-DA7F-4D28-9077-88C0B7C77E35}.Release|Win32.ActiveCfg = Release|Win32 + {EB33566E-DA7F-4D28-9077-88C0B7C77E35}.Release|Win32.Build.0 = Release|Win32 EndGlobalSection GlobalSection(SolutionProperties) = preSolution HideSolutionNode = FALSE diff --git a/src/png/projects/vstudio/zlib.props b/src/png/projects/vstudio/zlib.props index ae84b88974..e9b8c6253e 100644 --- a/src/png/projects/vstudio/zlib.props +++ b/src/png/projects/vstudio/zlib.props @@ -1,43 +1,37 @@ - + - - ..\..\..\..\zlib124-dll\zlib-1.2.4 + The directory need only contain the '.c' and '.h' files from the + source. + + If you use a relative directory name (as below) then it must be + relative to the project directories; these are one level deepers than + the directories containing this file. - - ..\..\..\..\zlib-1.2.4 + ..\..\..\..\zlib-1.2.5 diff --git a/src/png/projects/vstudio/zlib/zlib.vcxproj b/src/png/projects/vstudio/zlib/zlib.vcxproj index 94d75a3ede..45dbeb57d2 100644 --- a/src/png/projects/vstudio/zlib/zlib.vcxproj +++ b/src/png/projects/vstudio/zlib/zlib.vcxproj @@ -1,112 +1,174 @@ - - - - - Debug Library - Win32 - - - Debug - Win32 - - - - - - - - - - - - - - - - - Win32Proj - - - - - DynamicLibrary - true - - - StaticLibrary - - - DynamicLibrary - - - - - - - - - - - - - - - - false - - - true - - - true - - - - WIN32;ZLIB_DLL;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions) - MultiThreadedDebugDLL - Level3 - ProgramDatabase - Disabled - true - - - true - Windows - 1 - msvcrtd.lib;kernel32.lib - true - - - - - WIN32;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions) - MultiThreadedDebugDLL - Level3 - ProgramDatabase - Disabled - - - MachineX86 - true - Windows - - - - - WIN32;NDEBUG;_WINDOWS;_USRDLL;DEBUGZLIB_EXPORTS;%(PreprocessorDefinitions) - MultiThreadedDLL - Level3 - ProgramDatabase - - - MachineX86 - true - Windows - true - true - - - - - - + + + + + Debug Library + Win32 + + + Debug + Win32 + + + Release Library + Win32 + + + Release + Win32 + + + + + + + + + + + + + + + + + Win32Proj + + + + + StaticLibrary + + + StaticLibrary + + + StaticLibrary + + + StaticLibrary + + + StaticLibrary + + + + + + + + + + + + + + + + + + + true + + + true + + + true + + + true + + + true + + + + WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions) + MultiThreadedDebug + TurnOffAllWarnings + ProgramDatabase + Disabled + true + + + MachineX86 + true + Windows + + + + + WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions) + TurnOffAllWarnings + ProgramDatabase + Disabled + true + + + MachineX86 + true + Windows + + + + + Level3 + ProgramDatabase + Full + true + true + false + true + true + true + MultiThreaded + + + MachineX86 + true + Windows + + + true + + + + + Level3 + ProgramDatabase + Full + true + true + false + true + true + true + + + MachineX86 + true + Windows + + + true + + + + + WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions) + Level3 + ProgramDatabase + + + MachineX86 + true + Windows + true + true + + + + + + diff --git a/src/png/projects/xcode/README.txt b/src/png/projects/xcode/README.txt deleted file mode 100644 index 49f91caa3c..0000000000 --- a/src/png/projects/xcode/README.txt +++ /dev/null @@ -1,3 +0,0 @@ - -1 September 2010: Philippe Hausler updated the xcode project to work -with libpng-1.4.x and added iOS targets for simulator and device. diff --git a/src/png/projects/xcode/libpng.xcodeproj/.gitignore b/src/png/projects/xcode/libpng.xcodeproj/.gitignore deleted file mode 100644 index 0a2b14bae9..0000000000 --- a/src/png/projects/xcode/libpng.xcodeproj/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -*.mode1* -*.pbxuser diff --git a/src/png/projects/xcode/libpng.xcodeproj/project.pbxproj b/src/png/projects/xcode/libpng.xcodeproj/project.pbxproj deleted file mode 100644 index 5e43b81129..0000000000 --- a/src/png/projects/xcode/libpng.xcodeproj/project.pbxproj +++ /dev/null @@ -1,805 +0,0 @@ -// !$*UTF8*$! -{ - archiveVersion = 1; - classes = { - }; - objectVersion = 45; - objects = { - -/* Begin PBXAggregateTarget section */ - 5BF3B110122B1C860092AE4E /* libpng */ = { - isa = PBXAggregateTarget; - buildConfigurationList = 5BF3B11B122B1CD80092AE4E /* Build configuration list for PBXAggregateTarget "libpng" */; - 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); - defaultConfigurationIsVisible = 0; - defaultConfigurationName = Release; - }; - 5BF3B14B122DE5430092AE4E /* Build configuration list for PBXAggregateTarget "Configure" */ = { - isa = XCConfigurationList; - buildConfigurations = ( - 5BF3B149122DE51F0092AE4E /* Debug */, - 5BF3B14A122DE51F0092AE4E /* Release */, - ); - defaultConfigurationIsVisible = 0; - defaultConfigurationName = Release; - }; -/* End XCConfigurationList section */ - }; - rootObject = 08FB7793FE84155DC02AAC07 /* Project object */; -} diff --git a/src/png/scripts/README.txt b/src/png/scripts/README.txt index 9d436ad264..fdc48b9608 100644 --- a/src/png/scripts/README.txt +++ b/src/png/scripts/README.txt @@ -1,8 +1,9 @@ -Makefiles for libpng version 1.4.4 - September 23, 2010 +Makefiles for libpng version 1.5.6 - November 3, 2011 +pnglibconf.h.prebuilt => Stores configuration settings makefile.linux => Linux/ELF makefile - (gcc, creates libpng14.so.14.1.4.4) + (gcc, creates libpng15.so.15.1.5.6) makefile.gcc => Generic makefile (gcc, creates static libpng.a) makefile.knr => Archaic UNIX Makefile that converts files with ansi2knr (Requires ansi2knr.c from @@ -15,12 +16,11 @@ Makefiles for libpng version 1.4.4 - September 23, 2010 makefile.beos => beos makefile makefile.bor => Borland makefile (uses bcc) makefile.cegcc => minge32ce for Windows CE makefile - makefile.cygwin => Cygwin/gcc makefile makefile.darwin => Darwin makefile, can use on MacosX makefile.dec => DEC Alpha UNIX makefile makefile.dj2 => DJGPP 2 makefile makefile.elf => Linux/ELF makefile symbol versioning, - (gcc, creates libpng14.so.14.1.4.4) + (gcc, creates libpng15.so.15.1.5.6) makefile.freebsd => FreeBSD makefile makefile.gcc => Generic gcc makefile makefile.hpgcc => HPUX makefile using gcc @@ -28,40 +28,49 @@ Makefiles for libpng version 1.4.4 - September 23, 2010 makefile.hp64 => HPUX (10.20 and 11.00) makefile, 64-bit makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static) makefile.intel => Intel C/C++ version 4.0 and later - makefile.mingw => Mingw makefile makefile.mips => MIPS makefile makefile.msc => Microsoft C makefile makefile.netbsd => NetBSD/cc makefile, makes libpng.so. makefile.openbsd => OpenBSD makefile - makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def) + makefile.os2 => OS/2 Makefile (gcc and emx, requires libpng.def) makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc makefile.sggcc => Silicon Graphics (gcc, - creates libpng14.so.14.1.4.4) + creates libpng15.so.15.1.5.6) makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib) makefile.solaris => Solaris 2.X makefile (gcc, - creates libpng14.so.14.1.4.4) + creates libpng15.so.15.1.5.6) makefile.so9 => Solaris 9 makefile (gcc, - creates libpng14.so.14.1.4.4) + creates libpng15.so.15.1.5.6) makefile.std => Generic UNIX makefile (cc, creates static libpng.a) makefile.sunos => Sun makefile makefile.32sunu => Sun Ultra 32-bit makefile makefile.64sunu => Sun Ultra 64-bit makefile makefile.tc3 => Turbo C 3.0 makefile makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and later - makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model makevms.com => VMS build script smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC compiler (Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc) Other supporting scripts: + README.txt => This file descrip.mms => VMS makefile for MMS or MMK libpng-config-body.in => used by several makefiles to create libpng-config libpng-config-head.in => used by several makefiles to create libpng-config libpng.pc.in => Used by several makefiles to create libpng.pc - pngos2.def => OS/2 module definition file used by makefile.os2 - pngwin.def => Module definitions for makefile.cygwin and mingw - png32ce.def => Module definition file used by makefile.cegcc - pngwin.rc => Used by the visualc6 and visualc71 projects. + pngwin.rc => Used by the visualc71 project. + pngwin.def => Used by makefile.os2 + pngwin.dfn => Used to maintain pngwin.def SCOPTIONS.ppc => Used with smakefile.ppc +checksym.awk => Used for maintaining pnglibconf.h +def.dfn => Used for maintaining pnglibconf.h +options.awk => Used for maintaining pnglibconf.h +pnglibconf.dfa => Used for maintaining pnglibconf.h +pnglibconf.mak => Used for maintaining pnglibconf.h +sym.dfn => Used for symbol versioning +symbols.def => Used for symbol versioning +symbols.dfn => Used for symbol versioning +vers.dfn => Used for symbol versioning + + Further information can be found in comments in the individual makefiles. diff --git a/src/png/scripts/checksym.awk b/src/png/scripts/checksym.awk new file mode 100755 index 0000000000..ba4c99b564 --- /dev/null +++ b/src/png/scripts/checksym.awk @@ -0,0 +1,161 @@ +#!/bin/awk -f +# Check a list of symbols against the master definition +# (official) list. Arguments: +# +# awk -f checksym.awk official-def list-to-check +# +# Output is a file in the current directory called 'symbols.new', +# stdout holds error messages. Error code indicates success or +# failure. +# +# NOTE: this is a pure, old fashioned, awk script. It will +# work with any awk + +BEGIN{ + err=0 + master="" # master file + official[1] = "" # defined symbols from master file + symbol[1] = "" # defined symbols from png.h + removed[1] = "" # removed symbols from png.h + lasto = 0 # last ordinal value from png.h + mastero = 0 # highest ordinal in master file + symbolo = 0 # highest ordinal in png.h + missing = "error"# log an error on missing symbols +} + +# Read existing definitions from the master file (the first +# file on the command line.) This must be a def file and it +# has definition lines (others are ignored) of the form: +# +# symbol @ordinal +# +master == "" { + master = FILENAME +} +FILENAME==master && NF==2 && $2~/^@/ && $1!~/^;/ { + o=0+substr($2,2) + if (o > 0) { + if (official[o] == "") { + official[o] = $1 + if (o > mastero) mastero = o + next + } else + print master ": duplicated symbol:", official[o] ":", $0 + } else + print master ": bad export line format:", $0 + err = 1 +} +FILENAME==master && $1==";missing" && NF==2{ + # This allows the master file to control how missing symbols + # are handled; symbols that aren't in either the master or + # the new file. Valid values are 'ignore', 'warning' and + # 'error' + missing = $2 +} +FILENAME==master { + next +} + +# Read new definitions, these are free form but the lines must +# just be symbol definitions. Lines will be commented out for +# 'removed' symbols, introduced in png.h using PNG_REMOVED rather +# than PNG_EXPORT. Use symbols.dfn or pngwin.dfn to generate the +# input file. +# +# symbol @ordinal # two fields, exported symbol +# ; symbol @ordinal # three fields, removed symbol +# ; @ordinal # two fields, the last ordinal +NF==2 && $1 == ";" && $2 ~ /^@[1-9][0-9]*$/ { # last ordinal + o=0+substr($2,2) + if (lasto == 0 || lasto == o) + lasto=o + else { + print "png.h: duplicated last ordinal:", lasto, o + err = 1 + } + next +} +NF==3 && $1 == ";" && $3 ~ /^@[1-9][0-9]*$/ { # removed symbol + o=0+substr($3,2) + if (removed[o] == "" || removed[o] == $2) { + removed[o] = $2 + if (o > symbolo) symbolo = o + } else { + print "png.h: duplicated removed symbol", o ": '" removed[o] "' != '" $2 "'" + err = 1 + } + next +} +NF==2 && $2 ~ /^@[1-9][0-9]*$/ { # exported symbol + o=0+substr($2,2) + if (symbol[o] == "" || symbol[o] == $1) { + symbol[o] = $1 + if (o > symbolo) symbolo = o + } else { + print "png.h: duplicated symbol", o ": '" symbol[o] "' != '" $1 "'" + err = 1 + } +} +{ + next # skip all other lines +} + +# At the end check for symbols marked as both duplicated and removed +END{ + if (symbolo > lasto) { + print "highest symbol ordinal in png.h,", symbolo ", exceeds last ordinal from png.h", lasto + err = 1 + } + if (mastero > lasto) { + print "highest symbol ordinal in", master ",", mastero ", exceeds last ordinal from png.h", lasto + err = 1 + } + unexported=0 + for (o=1; o<=lasto; ++o) { + if (symbol[o] == "" && removed[o] == "") { + if (unexported == 0) unexported = o + if (official[o] == "") { + # missing in export list too, so ok + if (o < lasto) continue + } + } + if (unexported != 0) { + # Symbols in the .def but not in the new file are errors, but + # the 'unexported' symbols aren't in either. By default this + # is an error too (see the setting of 'missing' at the start), + # but this can be reset on the command line or by stuff in the + # file - see the comments above. + if (missing != "ignore") { + if (o-1 > unexported) + print "png.h:", missing ": missing symbols:", unexported "-" o-1 + else + print "png.h:", missing ": missing symbol:", unexported + if (missing != "warning") + err = 1 + } + unexported = 0 + } + if (symbol[o] != "" && removed[o] != "") { + print "png.h: symbol", o, "both exported as '" symbol[o] "' and removed as '" removed[o] "'" + err = 1 + } else if (symbol[o] != official[o]) { + # either the symbol is missing somewhere or it changed + err = 1 + if (symbol[o] == "") + print "png.h: symbol", o, "is exported as '" official[o] "' in", master + else if (official[o] == "") + print "png.h: exported symbol", o, "'" symbol[o] "' not present in", master + else + print "png.h: exported symbol", o, "'" symbol[o] "' exists as '" official[o] "' in", master + } + + # Finally generate symbols.new + if (symbol[o] != "") + print " " symbol[o], "@" o > "symbols.new" + } + + if (err != 0) { + print "*** A new list is in symbols.new ***" + exit 1 + } +} diff --git a/src/png/scripts/chkfmt b/src/png/scripts/chkfmt new file mode 100755 index 0000000000..9da6475fd4 --- /dev/null +++ b/src/png/scripts/chkfmt @@ -0,0 +1,137 @@ +#!/bin/sh +# +# Check the format of the source files in the current directory - checks for a +# line length of 80 characters max and no tab characters. +# +# Optionally arguments are files or directories to check. +# +# -v: output the long lines (makes fixing them easier) +# -e: spawn an editor for each file that needs a change ($EDITOR must be +# defined). When using -e the script MUST be run from an interactive +# command line. +verbose= +edit= +vers= +test "$1" = "-v" && { + shift + verbose=yes +} +test "$1" = "-e" && { + shift + if test -n "$EDITOR" + then + edit=yes + + # Copy the standard streams for the editor + exec 3>&0 4>&1 5>&2 + else + echo "chkfmt -e: EDITOR must be defined" >&2 + exit 1 + fi +} + +# Function to edit a single file - if the file isn't changed ask the user +# whether or not to continue. This stuff only works if the script is run from +# the command line (otherwise, don't specify -e or you will be sorry). +doed(){ + cp "$file" "$file".orig + "$EDITOR" "$file" 0>&3 1>&4 2>&5 3>&- 4>&- 5>&- || exit 1 + if cmp -s "$file".orig "$file" + then + rm "$file".orig + echo -n "$file: file not changed, type anything to continue: " >&5 + read ans 0>&3 + test -n "$ans" || return 1 + fi + return 0 +} + +# In beta versions the version string which appears in files can be a little +# long and cause spuriously overlong lines. To avoid this subtitute the version +# string with a 'standard' version a.b.cc before checking for long lines. +if test -r png.h +then + vers="`sed -n -e \ + 's/^#define PNG_LIBPNG_VER_STRING .\([0-9]\.[0-9]\.[0-9][0-9a-z]*\).$/\1/p' \ + png.h`" + echo "chkfmt: checking version $vers" +fi +if test -z "$vers" +then + echo "chkfmt: png.h not found, ignoring version number" >&2 +fi + +test -n "$1" || set -- . +find "$@" \( -type d \( -name '.git' -o -name '.libs' -o -name 'projects' \) \ + -prune \) -o \( -type f \ + ! -name '*.[oa]' ! -name '*.l[oa]' ! -name '*.png' ! -name '*.out' \ + ! -name '*.jpg' ! -name '*.patch' ! -name '*.obj' ! -name '*.exe' \ + ! -name '*.com' ! -name '*.tar.*' ! -name '*.zip' ! -name '*.ico' \ + ! -name '*.res' ! -name '*.rc' ! -name '*.mms' ! -name '*.rej' \ + ! -name '*.dsp' ! -name '*.orig' ! -name '*.dfn' ! -name '*.swp' \ + ! -name '~*' ! -name '*.3' \ + ! -name 'missing' ! -name 'mkinstalldirs' ! -name 'depcomp' \ + ! -name 'aclocal.m4' ! -name 'install-sh' ! -name 'Makefile.in' \ + ! -name 'ltmain.sh' ! -name 'config*' -print \) | { + st=0 + while read file + do + case "$file" in + *.mak|*[Mm]akefile.*|*[Mm]akefile) + # Makefiles require tabs, dependency lines can be this long. + check_tabs= + line_length=100;; + *.awk) + # Includes literal tabs + check_tabs= + # The following is arbitrary + line_length=132;; + *contrib/*/*.[ch]) + check_tabs=yes + line_length=96;; + *) + check_tabs=yes + line_length=80;; + esac + + # Note that vers can only contain 0-9, . and a-z + if test -n "$vers" + then + sed -e "s/$vers/a.b.cc/g" "$file" >"$file".$$ + else + cp "$file" "$file".$$ + fi + splt="`fold -$line_length "$file".$$ | diff -c "$file".$$ -`" + rm "$file".$$ + + if test -n "$splt" + then + echo "$file: lines too long" + st=1 + if test -n "$EDITOR" -a -n "$edit" + then + doed "$file" || exit 1 + elif test -n "$verbose" + then + echo "$splt" + fi + fi + if test -n "$check_tabs" + then + tab="`tr -c -d '\t' <"$file"`" + if test -n "$tab" + then + echo "$file: file contains tab characters" + st=1 + if test -n "$EDITOR" -a -n "$edit" + then + doed "$file" || exit 1 + elif test -n "$verbose" + then + echo "$splt" + fi + fi + fi + done + exit $st +} diff --git a/src/png/scripts/def.dfn b/src/png/scripts/def.dfn new file mode 100644 index 0000000000..d918d4c3c8 --- /dev/null +++ b/src/png/scripts/def.dfn @@ -0,0 +1,38 @@ +/* def.dfn - define format of libpng.def + * + * Last changed in libpng version 1.5.0 [(PENDING RELEASE)] + * Copyright (c) 2010-2011 Glenn Randers-Pehrson + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +/* These macros exist to make the header and trailer shorter below: */ +#define S PNG_DEFN_MAGIC +#define E PNG_DEFN_END + +/* Write the export file header: */ +S-;---------------------------------------------------------------E +S-; LIBPNG module definition file for OS/2-E +S-;---------------------------------------------------------------E +S--E +S-; If you give the library an explicit name one or other files-E +S-; may need modifying to support the new name on one or more-E +S-; systems.-E +S-LIBRARY-E +S-OS2 DESCRIPTION "PNG image compression library"-E +S-OS2 CODE PRELOAD MOVEABLE DISCARDABLE-E +S--E +S-EXPORTS-E +S-;Version 1.5.0beta58-E + +/* NOTE: @@@ is interpreted by the calling script as a signal to + * join the two things on either side, so we can do symbol + * substitution within the name, regular C ## joins the pp-tokens, + * not their final values. + */ +#define PNG_EXPORTA(ordinal, type, name, args, attributes)\ + PNG_DEFN_MAGIC- SYMBOL_PREFIX @@@ name-PNG_DEFN_END + +#include "../png.h" diff --git a/src/png/scripts/descrip.mms b/src/png/scripts/descrip.mms index d0642c0347..99ea1abccd 100644 --- a/src/png/scripts/descrip.mms +++ b/src/png/scripts/descrip.mms @@ -33,20 +33,20 @@ clean : # Other dependencies. -png.obj : png.h, pngconf.h, pngpriv.h -pngpread.obj : png.h, pngconf.h, pngpriv.h -pngset.obj : png.h, pngconf.h, pngpriv.h -pngget.obj : png.h, pngconf.h, pngpriv.h -pngread.obj : png.h, pngconf.h, pngpriv.h -pngrtran.obj : png.h, pngconf.h, pngpriv.h -pngrutil.obj : png.h, pngconf.h, pngpriv.h -pngerror.obj : png.h, pngconf.h, pngpriv.h -pngmem.obj : png.h, pngconf.h, pngpriv.h -pngrio.obj : png.h, pngconf.h, pngpriv.h -pngwio.obj : png.h, pngconf.h, pngpriv.h -pngtrans.obj : png.h, pngconf.h, pngpriv.h -pngwrite.obj : png.h, pngconf.h, pngpriv.h -pngwtran.obj : png.h, pngconf.h, pngpriv.h -pngwutil.obj : png.h, pngconf.h, pngpriv.h +png.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngpread.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngset.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngget.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngread.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngrtran.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngrutil.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngerror.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngmem.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngrio.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngwio.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngtrans.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngwrite.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngwtran.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h +pngwutil.obj : png.h, pngconf.h, pnglibconf.h, pngpriv.h, pngstruct.h, pnginfo.h, pngdebug.h pngtest.obj : png.h, pngconf.h diff --git a/src/png/scripts/libpng-config-head.in b/src/png/scripts/libpng-config-head.in index 3ecbddfd0c..a488cc2348 100755 --- a/src/png/scripts/libpng-config-head.in +++ b/src/png/scripts/libpng-config-head.in @@ -11,7 +11,7 @@ # Modeled after libxml-config. -version=1.4.4 +version=1.5.6 prefix="" libdir="" libs="" diff --git a/src/png/scripts/libpng.pc.in b/src/png/scripts/libpng.pc.in index 41e703e8aa..256d0ccac4 100644 --- a/src/png/scripts/libpng.pc.in +++ b/src/png/scripts/libpng.pc.in @@ -1,10 +1,10 @@ prefix=@prefix@ exec_prefix=@exec_prefix@ libdir=@libdir@ -includedir=@includedir@/libpng14 +includedir=@includedir@/libpng15 Name: libpng Description: Loads and saves PNG files -Version: 1.4.4 -Libs: -L${libdir} -lpng14 +Version: 1.5.6 +Libs: -L${libdir} -lpng15 Cflags: -I${includedir} diff --git a/src/png/scripts/makefile.32sunu b/src/png/scripts/makefile.32sunu index 3dd9fefe35..b5e5a33a06 100644 --- a/src/png/scripts/makefile.32sunu +++ b/src/png/scripts/makefile.32sunu @@ -1,6 +1,6 @@ # makefile for libpng on Solaris 2.x with cc # Contributed by William L. Sebok, based on makefile.linux -# Copyright (C) 2002, 2006, 2010 Glenn Randers-Pehrson +# Copyright (C) 2002, 2006, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1998 Greg Roelofs # Copyright (C) 1996, 1997 Andreas Dilger @@ -9,8 +9,8 @@ # and license in png.h # Library name: -LIBNAME=libpng14 -PNGMAJ = 14 +LIBNAME=libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).so @@ -29,7 +29,7 @@ RM_F=/bin/rm -f SUN_CC_FLAGS=-fast -xtarget=ultra SUN_LD_FLAGS=-fast -xtarget=ultra -# where make install puts libpng.a, libpng14.so and libpng14/png.h +# where make install puts libpng.a, libpng15.so and libpng15/png.h prefix=/a exec_prefix=$(prefix) @@ -82,6 +82,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +include scripts/pnglibconf.mak +DELETE = $(RM_F) +DFNFLAGS = $(DEFS) $(CPPFLAGS) + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -91,7 +95,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -102,7 +106,7 @@ libpng-config: echo R_opts=\"-R$(LIBPATH)\"; \ echo ccopts=\"-xtarget=ultra\"; \ echo ldopts=\"-xtarget=ultra\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -131,12 +135,12 @@ pngtest: pngtest.o $(LIBSO) test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -218,20 +222,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.64sunu b/src/png/scripts/makefile.64sunu index 916d94e29a..a0331d670e 100644 --- a/src/png/scripts/makefile.64sunu +++ b/src/png/scripts/makefile.64sunu @@ -1,6 +1,6 @@ # makefile for libpng on Solaris 2.x with cc # Contributed by William L. Sebok, based on makefile.linux -# Copyright (C) 2002, 2006, 2010 Glenn Randers-Pehrson +# Copyright (C) 2002, 2006, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1998 Greg Roelofs # Copyright (C) 1996, 1997 Andreas Dilger @@ -9,8 +9,8 @@ # and license in png.h # Library name: -LIBNAME=libpng14 -PNGMAJ = 14 +LIBNAME=libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).so @@ -29,7 +29,7 @@ RM_F=/bin/rm -f SUN_CC_FLAGS=-fast -xtarget=ultra -xarch=v9 SUN_LD_FLAGS=-fast -xtarget=ultra -xarch=v9 -# where make install puts libpng.a, libpng14.so and libpng14/png.h +# where make install puts libpng.a, libpng15.so and libpng15/png.h prefix=/a exec_prefix=$(prefix) @@ -47,7 +47,7 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ -Wstrict-prototypes -Wmissing-prototypes #-Wconversion CFLAGS=-I$(ZLIBINC) $(SUN_CC_FLAGS) \ # $(WARNMORE) -g -DPNG_DEBUG=5 -LDFLAGS=-L. -R. $(SUN_LD_FLAGS) -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng14 -lz -lm +LDFLAGS=-L. -R. $(SUN_LD_FLAGS) -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng15 -lz -lm INCPATH=$(prefix)/include LIBPATH=$(exec_prefix)/lib @@ -82,6 +82,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +include scripts/pnglibconf.mak +DELETE = $(RM_F) +DFNFLAGS = $(DEFS) $(CPPFLAGS) + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -91,7 +95,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -102,7 +106,7 @@ libpng-config: echo R_opts=\"-R$(LIBPATH)\"; \ echo ccopts=\"-xtarget=ultra -xarch=v9\"; \ echo ldopts=\"-xtarget=ultra -xarch=v9\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -134,9 +138,9 @@ test: pngtest install-headers: png.h pngconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -218,20 +222,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.acorn b/src/png/scripts/makefile.acorn index a0e577b245..00b8fb5b35 100644 --- a/src/png/scripts/makefile.acorn +++ b/src/png/scripts/makefile.acorn @@ -43,8 +43,15 @@ Test: @.pngtest .c.o: cc $(ccflags) -o $@ $< +# See scripts.mak.libpngconf for how to generate this: +@.h.libpngconf: @.scripts.h.libpngconf + copy @.scripts.h.libpngconf $@ # Static dependencies: +@.o.png @.o.pngerror @.o.pngrio @.o.pngwio @.o.pngmem \ +@.o.pngpread @.o.pngset @.o.pngget @.o.pngread @.o.pngrtran \ +@.o.pngrutil @.o.pngtrans @.o.pngwrite @.o.pngwtran @.o.pngwutil \ +@.o.pngtest: @.h.libpngconf # Dynamic dependencies: diff --git a/src/png/scripts/makefile.aix b/src/png/scripts/makefile.aix index f8a7dd1c84..bb4c40d4b0 100644 --- a/src/png/scripts/makefile.aix +++ b/src/png/scripts/makefile.aix @@ -21,8 +21,8 @@ RANLIB = ranlib RM_F = rm -f LN_SF = ln -f -s -LIBNAME=libpng14 -PNGMAJ = 14 +LIBNAME=libpng15 +PNGMAJ = 15 prefix=/usr/local INCPATH=$(prefix)/include @@ -46,8 +46,8 @@ LDDEBUG = CRELEASE = -O2 LDRELEASE = -s WARNMORE=-W -Wall -CFLAGS = -D_ALL_SOURCE -I$(ZLIBINC) $(WARNMORE) $(CRELEASE) -LDFLAGS = -L. -L$(ZLIBLIB) -lpng14 -lz -lm $(LDRELEASE) +CFLAGS = -I$(ZLIBINC) $(WARNMORE) $(CRELEASE) +LDFLAGS = -L. -L$(ZLIBLIB) -lpng15 -lz -lm $(LDRELEASE) # File extensions O=.o @@ -62,6 +62,10 @@ OBJS = png$(O) pngerror$(O) pngget$(O) pngmem$(O) pngpread$(O) \ # Targets all: $(LIBNAME)$(A) pngtest$(E) +include scripts/pnglibconf.mak +REMOVE = $(RM_F) +DFNFLAGS = $(DEFS) $(CPPFLAGS) + $(LIBNAME)$(A): $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -78,11 +82,14 @@ install: $(LIBNAME)$(A) -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi -@$(RM_F) $(DI)/$(LIBNAME)/png.h -@$(RM_F) $(DI)/$(LIBNAME)/pngconf.h + -@$(RM_F) $(DI)/$(LIBNAME)/pnglibconf.h -@$(RM_F) $(DI)/png.h -@$(RM_F) $(DI)/pngconf.h - cp png.h pngconf.h $(DI)/$(LIBNAME) + -@$(RM_F) $(DI)/pnglibconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) chmod 644 $(DI)/$(LIBNAME)/png.h \ - $(DI)/$(LIBNAME)/pngconf.h + $(DI)/$(LIBNAME)/pngconf.h \ + $(DI)/$(LIBNAME)/pnglibconf.h -@$(RM_F) -r $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) -@$(RM_F) $(DL)/$(LIBNAME)$(A) @@ -93,22 +100,22 @@ install: $(LIBNAME)$(A) (cd $(DI); $(LN_SF) libpng/* .;) clean: - $(RM_F) *.o $(LIBNAME)$(A) pngtest pngout.png - -png$(O): png.h pngconf.h pngpriv.h -pngerror$(O): png.h pngconf.h pngpriv.h -pngget$(O): png.h pngconf.h pngpriv.h -pngmem$(O): png.h pngconf.h pngpriv.h -pngpread$(O): png.h pngconf.h pngpriv.h -pngread$(O): png.h pngconf.h pngpriv.h -pngrio$(O): png.h pngconf.h pngpriv.h -pngrtran$(O): png.h pngconf.h pngpriv.h -pngrutil$(O): png.h pngconf.h pngpriv.h -pngset$(O): png.h pngconf.h pngpriv.h -pngtrans$(O): png.h pngconf.h pngpriv.h -pngwio$(O): png.h pngconf.h pngpriv.h -pngwrite$(O): png.h pngconf.h pngpriv.h -pngwtran$(O): png.h pngconf.h pngpriv.h -pngwutil$(O): png.h pngconf.h pngpriv.h - -pngtest$(O): png.h pngconf.h + $(RM_F) *.o $(LIBNAME)$(A) pngtest pngout.png pnglibconf.h + +png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest$(O): png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.amiga b/src/png/scripts/makefile.amiga index 8bf0f455f1..228b5c22a7 100644 --- a/src/png/scripts/makefile.amiga +++ b/src/png/scripts/makefile.amiga @@ -6,8 +6,6 @@ # For conditions of distribution and use, see the disclaimer # and license in png.h # -# Note: Use #define PNG_READ_BIG_ENDIAN_SUPPORTED in pngconf.h -# # Location/path of zlib include files ZLIB=/zlib #compiler @@ -26,6 +24,8 @@ LDLIBS= libpng.lib libgz.lib LIB:scm.lib LIB:sc.lib Lib:amiga.lib LN= slink # file deletion command RM= delete quiet +# file copy command? +CP= copy # library (.lib) file creation command AR= oml # make directory command @@ -41,6 +41,11 @@ libpng.lib: $(OBJS) -$(RM) libpng.lib $(AR) libpng.lib r $(OBJS) +$(OBJS): pngpriv.h png.h pngconf.h pnglibconf.h pnginfo.h pngstruct.h pngdebug.h + +pnglibconf.h: scripts/pnglibconf.h.prebuilt +$(CP) scripts/pnglibconf.h.prebuilt pnglibconf.h + pngtest: pngtest.o libpng.lib $(LN) libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ echo prefix=\"$(prefix)\"; \ echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ - echo libs=\"-lpng14 -lz \"; \ + echo libs=\"-lpng15 -lz \"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -106,17 +110,17 @@ $(LIBSOMAJ): $(OBJSDLL) $(LIBSOMAJ) $(OBJSDLL) $(LDFLAGS) pngtest: pngtest.o $(LIBSO) - $(CC) -L$(ZLIBLIB) -L. -lz -lpng14 -o pngtest pngtest.o + $(CC) -L$(ZLIBLIB) -L. -lz -lpng15 -o pngtest pngtest.o test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -128,7 +132,6 @@ install-static: install-headers libpng.a (cd $(DL); $(LN_SF) $(LIBNAME).a libpng.a) install-shared: install-headers $(LIBSOMAJ) libpng.pc - -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi -@$(RM_F) $(DL)/$(LIBSO) -@$(RM_F) $(DL)/$(LIBSOREL) @@ -189,24 +192,24 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngout.png libpng-config \ $(LIBSO) $(LIBSOMAJ)* pngtesti \ - libpng.pc + pnglibconf.h libpng.pc # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.bor b/src/png/scripts/makefile.bor index dcc3c633c0..96d5e861a3 100644 --- a/src/png/scripts/makefile.bor +++ b/src/png/scripts/makefile.bor @@ -108,6 +108,10 @@ LIBNAME=libpng$(MODEL).lib all: libpng pngtest +# try !inlude scripts\pnglibconf.mak for more options +pnglibconf.h: scripts\pnglibconf.h.prebuilt + copy scripts\pnglibconf.h.prebuilt $@ + libpng: $(LIBNAME) pngtest: pngtest$(MODEL).exe @@ -117,21 +121,21 @@ test: pngtest$(MODEL).exe ## Minor Targets -png.obj: png.c png.h pngconf.h pngpriv.h -pngerror.obj: pngerror.c png.h pngconf.h pngpriv.h -pngget.obj: pngget.c png.h pngconf.h pngpriv.h -pngmem.obj: pngmem.c png.h pngconf.h pngpriv.h -pngpread.obj: pngpread.c png.h pngconf.h pngpriv.h -pngread.obj: pngread.c png.h pngconf.h pngpriv.h -pngrio.obj: pngrio.c png.h pngconf.h pngpriv.h -pngrtran.obj: pngrtran.c png.h pngconf.h pngpriv.h -pngrutil.obj: pngrutil.c png.h pngconf.h pngpriv.h -pngset.obj: pngset.c png.h pngconf.h pngpriv.h -pngtrans.obj: pngtrans.c png.h pngconf.h pngpriv.h -pngwio.obj: pngwio.c png.h pngconf.h pngpriv.h -pngwrite.obj: pngwrite.c png.h pngconf.h pngpriv.h -pngwtran.obj: pngwtran.c png.h pngconf.h pngpriv.h -pngwutil.obj: pngwutil.c png.h pngconf.h pngpriv.h +png.obj: png.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.obj: pngerror.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.obj: pngget.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.obj: pngmem.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.obj: pngpread.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.obj: pngread.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.obj: pngrio.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.obj: pngrtran.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.obj: pngrutil.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.obj: pngset.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.obj: pngtrans.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.obj: pngwio.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.obj: pngwrite.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.obj: pngwtran.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.obj: pngwutil.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(LIBNAME): $(OBJS) -del $(LIBNAME) @@ -139,7 +143,7 @@ $(LIBNAME): $(OBJS) $(LIBOBJS), libpng$(MODEL) | -pngtest$(MODEL).obj: pngtest.c png.h pngconf.h +pngtest$(MODEL).obj: pngtest.c png.h pngconf.h pnglibconf.h $(CC) $(CFLAGS) -opngtest$(MODEL) -c pngtest.c pngtest$(MODEL).exe: pngtest$(MODEL).obj @@ -147,6 +151,7 @@ pngtest$(MODEL).exe: pngtest$(MODEL).obj # Clean up anything else you want clean: + -del pnglibconf.h -del *.obj -del *.exe -del *.lib diff --git a/src/png/scripts/makefile.cegcc b/src/png/scripts/makefile.cegcc index 2639f6d450..f73929b794 100644 --- a/src/png/scripts/makefile.cegcc +++ b/src/png/scripts/makefile.cegcc @@ -22,16 +22,16 @@ # make clean VERMAJ = 1 -VERMIN = 4 -VERMIC = 4 +VERMIN = 5 +VERMIC = 6 VER = $(VERMAJ).$(VERMIN).$(VERMIC) NAME = libpng PACKAGE = $(NAME)-$(VER) -BIN = libpng14-0.dll -LIB = libpng14.a libpng14.dll.a libpng.a libpng.dll.a scripts/png32ce.def -INCLUDE = png.h pngconf.h pngpriv.h -PC = libpng14.pc libpng.pc +BIN = libpng15-0.dll +LIB = libpng15.a libpng15.dll.a libpng.a libpng.dll.a +INCLUDE = png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +PC = libpng15.pc libpng.pc MANIFESTVERBIN = "Libpng-$(VER): Binary files" MANIFESTVERDEV = "Libpng-$(VER): Developer files" @@ -64,7 +64,10 @@ copy-src: compilation: @echo " * Compilation of $(PACKAGE)" - cd $(PACKAGE) && CPPFLAGS="$(CPPFLAGS) -DPNG_BUILD_DLL -DPNG_CONSOLE_IO_SUPPORTED -D_WIN32_WCE=0x0420" CFLAGS="$(CFLAGS) -mms-bitfields -O3 -pipe -fomit-frame-pointer" LDFLAGS="$(LDFLAGS) -Wl,--enable-auto-import -Wl,-s" ./configure --prefix=/opt/wince --host=arm-mingw32ce && make + cd $(PACKAGE) && CPPFLAGS="$(CPPFLAGS) -DPNG_CONSOLE_IO_SUPPORTED -D_WIN32_WCE=0x0420" \ + CFLAGS="$(CFLAGS) -mms-bitfields -O3 -pipe -fomit-frame-pointer" \ + LDFLAGS="$(LDFLAGS) -Wl,--enable-auto-import -Wl,-s" \ + ./configure --prefix=/opt/wince --host=arm-mingw32ce && make copy: @echo " * Copy of binary and development files" diff --git a/src/png/scripts/makefile.cygwin b/src/png/scripts/makefile.cygwin deleted file mode 100644 index 23cabb1889..0000000000 --- a/src/png/scripts/makefile.cygwin +++ /dev/null @@ -1,291 +0,0 @@ -# makefile for cygwin on x86 -# Builds both dll (with import lib) and static lib versions -# of the library, and builds two copies of pngtest: one -# statically linked and one dynamically linked. -# -# Copyright (C) 2002, 2006-2008 Soren Anderson, Charles Wilson, -# and Glenn Randers-Pehrson, based on makefile for linux-elf w/mmx by: -# Copyright (C) 1998-2000 Greg Roelofs -# Copyright (C) 1996, 1997 Andreas Dilger -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# This makefile intends to support building outside the src directory -# if desired. When invoking it, specify an argument to SRCDIR on the -# command line that points to the top of the directory where your source -# is located. - -ifdef SRCDIR -VPATH = $(SRCDIR) -else -SRCDIR = . -endif - -# Override DESTDIR= on the make install command line to easily support -# installing into a temporary location. Example: -# -# make install DESTDIR=/tmp/build/libpng -# -# If you're going to install into a temporary location -# via DESTDIR, $(DESTDIR)$(prefix) must already exist before -# you execute make install. - -DESTDIR= - -CC=gcc -ifdef MINGW -MINGW_CCFLAGS=-mno-cygwin -I/usr/include/mingw -MINGW_LDFLAGS=-mno-cygwin -L/usr/lib/mingw -endif - -# Where "make install" puts libpng*.a, *png*.dll, png.h, and pngconf.h -ifndef prefix -prefix=/usr -$(warning You haven't specified a 'prefix=' location. Defaulting to "/usr") -endif -exec_prefix=$(prefix) - -# Where the zlib library and include files are located -ZLIBLIB= /usr/lib -ZLIBINC= -#ZLIBLIB=../zlib -#ZLIBINC=../zlib - -ALIGN= -# for i386: -#ALIGN=-malign-loops=2 -malign-functions=2 - -WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ - -Wmissing-declarations -Wtraditional -Wcast-align \ - -Wstrict-prototypes -Wmissing-prototypes #-Wconversion - -CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \ - -W -Wall -O3 $(ALIGN) -funroll-loops \ - -fomit-frame-pointer) # $(WARNMORE) -g -DPNG_DEBUG=5 - -LIBNAME = libpng14 -PNGMAJ = 14 -CYGDLL = 14 - -SHAREDLIB=cygpng$(CYGDLL).dll -STATLIB=libpng.a -IMPLIB=libpng.dll.a -SHAREDDEF=libpng.def -LIBS=$(SHAREDLIB) $(STATLIB) -EXE=.exe - -LDFLAGS=$(strip -L. $(MINGW_LDFLAGS) -lpng $(addprefix -L,$(ZLIBLIB)) -lz) -LDSFLAGS=$(strip -shared -L. $(MINGW_LDFLAGS) -Wl,--export-all) -LDEXTRA=-Wl,--out-implib=$(IMPLIB) $(addprefix -L,$(ZLIBLIB)) -lz - -MKDIR_P=/bin/mkdir -pv -RANLIB=ranlib -#RANLIB=echo - -INCPATH=$(prefix)/include -LIBPATH=$(exec_prefix)/lib - -BINPATH=$(exec_prefix)/bin -MANPATH=$(prefix)/man -MAN3PATH=$(MANPATH)/man3 -MAN5PATH=$(MANPATH)/man5 - -# cosmetic: shortened strings: -S =$(SRCDIR) -D =$(DESTDIR) -DB =$(D)$(BINPATH) -DI =$(D)$(INCPATH) -DL =$(D)$(LIBPATH) - -OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ - pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \ - pngwtran.o pngmem.o pngerror.o pngpread.o - -OBJSDLL = $(OBJS:.o=.pic.o) - -.SUFFIXES: .c .o .pic.o - -%.o : %.c - $(CC) -c $(CFLAGS) -o $@ $< -%.pic.o : CFLAGS += -DPNG_BUILD_DLL -%.pic.o : %.c - $(CC) -c $(CFLAGS) -o $@ $< - -all: all-static all-shared libpng.pc libpng-config libpng.pc libpng-config - -# Make this to verify that "make [...] install" will do what you want. -buildsetup-tell: - @echo VPATH is set to: \"$(VPATH)\" - @echo prefix is set to: \"$(prefix)\" - @echo -e INCPATH,LIBPATH, etc. are set to:'\n' \ - $(addprefix $(D),$(INCPATH)'\n' $(LIBPATH)'\n' $(BINPATH)'\n' \ - $(MANPATH)'\n' $(MAN3PATH)'\n' $(MAN5PATH)'\n')'\n' - -libpng.pc: scripts/libpng.pc.in - @echo -e Making pkg-config file for this libpng installation..'\n' \ - using PREFIX=\"$(prefix)\"'\n' - cat scripts/libpng.pc.in | sed -e s!@prefix@!$(prefix)! \ - -e s!@exec_prefix@!$(exec_prefix)! \ - -e s!@libdir@!$(LIBPATH)! \ - -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz! > libpng.pc - -libpng-config: scripts/libpng-config-head.in scripts/libpng-config-body.in - @echo -e Making $(LIBNAME) libpng-config file for this libpng \ - installation..'\n' using PREFIX=\"$(prefix)\"'\n' - ( cat $(S)/scripts/libpng-config-head.in; \ - echo prefix=\"$(prefix)\"; \ - echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ - echo L_opts=\"-L$(LIBPATH)\"; \ - echo libs=\"-lpng$(CYGDLL) -lz\"; \ - cat $(S)/scripts/libpng-config-body.in ) > libpng-config - chmod +x libpng-config - -static: all-static -shared: all-shared -all-static: $(STATLIB) pngtest-stat$(EXE) -all-shared: $(SHAREDLIB) pngtest$(EXE) - -$(STATLIB): $(OBJS) - ar rc $@ $(OBJS) - $(RANLIB) $@ - -$(SHAREDDEF): scripts/pngwin.def - cat $< | sed -e '1{G;s/^\(.*\)\(\n\)/EXPORTS/;};2,/^EXPORTS/d' | \ - sed -e 's/\([^;]*\);/;/' > $@ - -$(SHAREDLIB): $(OBJSDLL) $(SHAREDDEF) - $(CC) $(LDSFLAGS) -o $@ $(OBJSDLL) -L. $(LDEXTRA) - -pngtest$(EXE): pngtest.pic.o $(SHAREDLIB) - $(CC) $(CFLAGS) $< $(LDFLAGS) -o $@ - -pngtest-stat$(EXE): pngtest.o $(STATLIB) - $(CC) -static $(CFLAGS) $< $(LDFLAGS) -o $@ - -pngtest.pic.o: pngtest.c - $(CC) $(CFLAGS) -c $< -o $@ - -pngtest.o: pngtest.c png.h pngconf.h - $(CC) $(CFLAGS) -c $< -o $@ - -test: test-static test-shared - -test-static: pngtest-stat$(EXE) - ./pngtest-stat $(S)/pngtest.png - -test-shared: pngtest$(EXE) - ./pngtest $(S)/pngtest.png - -install-static: $(STATLIB) install-headers install-man - -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi - install -m 644 $(STATLIB) $(DL)/$(LIBNAME).a - -@rm -f $(DL)/$(STATLIB) - (cd $(DL); ln -sf $(LIBNAME).a $(STATLIB)) - -install-shared: $(SHAREDLIB) libpng.pc libpng-config install-headers install-man - -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi - -@if [ ! -d $(DB) ]; then $(MKDIR_P) $(DB); fi - -@if [ ! -d $(DL)/pkgconfig ]; then $(MKDIR_P) $(DL)/pkgconfig; fi - -@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc - -@/bin/rm -f $(DL)/pkgconfig/libpng.pc - install -m 644 $(IMPLIB) $(DL)/$(LIBNAME).dll.a - -@rm -f $(DL)/$(IMPLIB) - (cd $(DL); ln -sf $(LIBNAME).dll.a $(IMPLIB)) - install -s -m 755 $(SHAREDLIB) $(DB) - install -m 644 libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc - (cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc) - -install-headers: - -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi - -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - -@rm -f $(DI)/png.h - -@rm -f $(DI)/pngconf.h - install -m 644 $(S)/png.h $(S)/pngconf.h $(DI)/$(LIBNAME) - -@rm -f $(DI)/libpng - (cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .) - -install-man: - -@if [ ! -d $(D)$(MAN3PATH) ]; then $(MKDIR_P) $(D)$(MAN3PATH); fi - -@if [ ! -d $(D)$(MAN5PATH) ]; then $(MKDIR_P) $(D)$(MAN5PATH); fi - install -m 644 $(S)/libpngpf.3 $(S)/libpng.3 $(D)$(MAN3PATH) - install -m 644 $(S)/png.5 $(D)$(MAN5PATH) - -install-config: libpng-config - -@if [ ! -d $(DB) ]; then $(MKDIR_P) $(DB); fi - -@/bin/rm -f $(DB)/libpng-config - -@/bin/rm -f $(DB)/$(LIBNAME)-config - cp libpng-config $(DB)/$(LIBNAME)-config - chmod 755 $(DB)/$(LIBNAME)-config - (cd $(DB); ln -sf $(LIBNAME)-config libpng-config) - -# Run this to verify that a future `configure' run will pick up the settings -# you want. -test-config-install: SHELL=/bin/bash -test-config-install: $(DB)/libpng-config - @echo -e Testing libpng-config functions...'\n' - @ for TYRA in LDFLAGS CPPFLAGS CFLAGS LIBS VERSION; \ - do \ - printf "(%d)\t %10s =%s\n" $$(($$gytiu + 1)) $$TYRA \ - "$$($(DB)/libpng-config `echo --$$TYRA |tr '[:upper:]' '[:lower:]'`)"; \ - gytiu=$$(( $$gytiu + 1 )); \ - done - -install: install-static install-shared install-man install-config - -# If you installed in $(DESTDIR), test-installed won't work until you -# move the library to its final location. Use test-dd to test it -# before then. - -test-dd: - echo - echo Testing installed dynamic shared library in $(DL). - $(CC) -I$(DI) $(CFLAGS) \ - `$(BINPATH)/libpng14-config --cflags` pngtest.c \ - -L$(DL) -L$(ZLIBLIB) \ - -o pngtestd `$(BINPATH)/libpng14-config --ldflags` - ./pngtestd pngtest.png - -test-installed: - $(CC) $(CFLAGS) \ - `$(BINPATH)/libpng14-config --cflags` pngtest.c \ - -L$(ZLIBLIB) \ - -o pngtesti$(EXE) `$(BINPATH)/libpng14-config --ldflags` - ./pngtesti$(EXE) pngtest.png - -clean: - /bin/rm -f *.pic.o *.o $(STATLIB) $(IMPLIB) $(SHAREDLIB) \ - pngtest-stat$(EXE) pngtest$(EXE) pngout.png $(SHAREDDEF) \ - libpng-config libpng.pc pngtesti$(EXE) - -DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO -writelock: - chmod a-w *.[ch35] $(DOCS) scripts/* - -.PHONY: buildsetup-tell libpng.pc libpng-config test-config-install clean - -# DO NOT DELETE THIS LINE -- make depend depends on it. - -png.o png.pic.o: png.h pngconf.h pngpriv.h png.c -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h pngerror.c -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h pngrio.c -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h pngwio.c -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h pngmem.c -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h pngset.c -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h pngget.c -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h pngread.c -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h pngrtran.c -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h pngrutil.c -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h pngtrans.c -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h pngwrite.c -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h pngwtran.c -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h pngwutil.c -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h pngpread.c - -pngtest.o: png.h pngconf.h pngtest.c -pngtest-stat.o: png.h pngconf.h pngtest.c - - - diff --git a/src/png/scripts/makefile.darwin b/src/png/scripts/makefile.darwin index 88e7f06907..337a8151eb 100644 --- a/src/png/scripts/makefile.darwin +++ b/src/png/scripts/makefile.darwin @@ -1,5 +1,5 @@ # makefile for libpng on Darwin / Mac OS X -# Copyright (C) 2002, 2004, 2006, 2008, 2010 Glenn Randers-Pehrson +# Copyright (C) 2002, 2004, 2006, 2008, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 2001 Christoph Pfisterer # derived from makefile.linux: # Copyright (C) 1998, 1999 Greg Roelofs @@ -9,7 +9,8 @@ # For conditions of distribution and use, see the disclaimer # and license in png.h -# where "make install" puts libpng.a, libpng14.dylib, png.h and pngconf.h +# where "make install" puts libpng.a, libpng15.dylib, png.h, pngconf.h, +# and pnglibconf.h prefix=/usr/local exec_prefix=$(prefix) @@ -20,8 +21,8 @@ ZLIBLIB=../zlib ZLIBINC=../zlib # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 +LIBNAME = libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).dylib @@ -36,10 +37,11 @@ MKDIR_P=mkdir -p LN_SF=ln -sf RANLIB=ranlib RM_F=/bin/rm -f +ARCH="-arch i386 -arch x86_64" # CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops -CFLAGS=-I$(ZLIBINC) -W -Wall -O -funroll-loops -LDFLAGS=-L. -L$(ZLIBLIB) -lpng14 -lz +CFLAGS=-I$(ZLIBINC) -W -Wall -O -funroll-loops $(ARCH) +LDFLAGS=-L. -L$(ZLIBLIB) -lpng15 -lz $(ARCH) INCPATH=$(prefix)/include LIBPATH=$(exec_prefix)/lib @@ -74,6 +76,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -83,14 +89,14 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz! > libpng.pc + -e s!-lpng15!-lpng15\ -lz! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ echo prefix=\"$(prefix)\"; \ echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz\"; \ + echo libs=\"-lpng15 -lz\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -100,7 +106,7 @@ $(LIBSO): $(LIBSOMAJ) $(LIBSOMAJ): $(OBJSDLL) $(CC) -dynamiclib \ -install_name $(LIBPATH)/$(LIBSOMAJ) \ - -current_version 14 -compatibility_version 14 \ + -current_version 15 -compatibility_version 15 \ -o $(LIBSOMAJ) \ $(OBJSDLL) -L$(ZLIBLIB) -lz @@ -110,12 +116,12 @@ pngtest: pngtest.o $(LIBSO) test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -187,7 +193,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngout.png libpng-config \ - libpng.pc $(LIBNAME).*dylib pngtesti + libpng.pc $(LIBNAME).*dylib pngtesti pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -195,20 +201,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.dec b/src/png/scripts/makefile.dec index 85d6e198d6..5301d87d33 100644 --- a/src/png/scripts/makefile.dec +++ b/src/png/scripts/makefile.dec @@ -1,5 +1,5 @@ # makefile for libpng on DEC Alpha Unix -# Copyright (C) 2000-2002, 2006, 2010 Glenn Randers-Pehrson +# Copyright (C) 2000-2002, 2006, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc. # # This code is released under the libpng license. @@ -7,8 +7,8 @@ # and license in png.h # Library name: -PNGMAJ = 14 -LIBNAME = libpng14 +PNGMAJ = 15 +LIBNAME = libpng15 # Shared library names: LIBSO=$(LIBNAME).so @@ -62,6 +62,10 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ all: $(LIBSO) libpng.a pngtest libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -71,7 +75,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -79,7 +83,7 @@ libpng-config: echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ echo ccopts=\"-std\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -96,12 +100,12 @@ pngtest: pngtest.o libpng.a test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@/bin/rm -f $(DI)/libpng (cd $(DI); $(LN_SF)(LIBNAME) libpng; $(LN_SF)(LIBNAME)/* .) @@ -175,24 +179,24 @@ test-installed: clean: /bin/rm -f *.o libpng.a pngtest pngtesti pngout.png \ libpng-config $(LIBSO) $(LIBSOMAJ)* \ - libpng.pc + libpng.pc pnglibconf.h # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.dj2 b/src/png/scripts/makefile.dj2 index fa8eb74fe9..87a05a364a 100644 --- a/src/png/scripts/makefile.dj2 +++ b/src/png/scripts/makefile.dj2 @@ -1,5 +1,5 @@ # DJGPP (DOS gcc) makefile for libpng -# Copyright (C) 2002, 2006, 2009-2010 Glenn Randers-Pehrson +# Copyright (C) 2002, 2006, 2009-2010-2011 Glenn Randers-Pehrson # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc. # # This code is released under the libpng license. @@ -24,6 +24,10 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ all: libpng.a pngtest +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) ar rc $@ $(OBJS) $(RANLIB) $@ @@ -35,24 +39,24 @@ pngtest: pngtest.o libpng.a test: pngtest ./pngtest clean: - rm -f *.o libpng.a pngtest pngout.png + rm -f *.o libpng.a pngtest pngout.png pnglibconf.h # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.elf b/src/png/scripts/makefile.elf index 090b8785d7..5af43b1845 100644 --- a/src/png/scripts/makefile.elf +++ b/src/png/scripts/makefile.elf @@ -1,5 +1,5 @@ -# makefile for libpng.a and libpng14.so on Linux ELF with gcc -# Copyright (C) 1998, 1999, 2002, 2006, 2008, 2010 Greg Roelofs +# makefile for libpng.a and libpng15.so on Linux ELF with gcc +# Copyright (C) 1998, 1999, 2002, 2006, 2008, 2010-2011 Greg Roelofs # and Glenn Randers-Pehrson # Copyright (C) 1996, 1997 Andreas Dilger # @@ -10,19 +10,19 @@ # Modified for Debian by Junichi Uekawa and Josselin Mouette # Major modifications are: # * link libpng explicitly with libz and libm -# * $(OLDSO).14 is a symlink rather than a different library +# * $(OLDSO).15 is a symlink rather than a different library # * versioned symbols # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 +LIBNAME = libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).so LIBSOMAJ=$(LIBNAME).so.$(PNGMAJ) LIBSOREL=$(LIBSOMAJ).$(RELEASE) OLDSO=libpng.so -OLDSOMAJ=libpng.so.14 +OLDSOMAJ=libpng.so.15 # Utilities: AR_RC=ar rc @@ -32,8 +32,8 @@ LN_SF=ln -sf RANLIB=ranlib RM_F=/bin/rm -f -# where "make install" puts libpng14.a, libpng14.so*, -# libpng14/png.h and libpng14/pngconf.h +# where "make install" puts libpng15.a, libpng15.so*, +# libpng15/png.h, libpng15/pngconf.h, and libpng15/pnglibconf.h # Prefix must be a full pathname. prefix=/usr/local exec_prefix=$(prefix) @@ -57,7 +57,7 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ CFLAGS=-W -Wall -D_REENTRANT -O2 \ $(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5 -LDFLAGS=-L. -lpng14 +LDFLAGS=-L. -lpng15 LDFLAGS_A=libpng.a -lz -lm LIBADDFLAGS=-lz -lm @@ -95,6 +95,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest pngtest-static libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -104,11 +108,11 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc -libpng.syms: png.h pngconf.h +libpng.syms: png.h pngconf.h pnglibconf.h $(CC) $(CFLAGS) -E -DPNG_BUILDSYMS -DPNG_INTERNAL png.h |\ - awk -F '[\t [\\]();]' -v PNGMAJ=$(PNGMAJ) 'BEGIN{printf("PNG14_%s {global:\n",PNGMAJ)}\ + awk -F '[\t [\\]();]' -v PNGMAJ=$(PNGMAJ) 'BEGIN{printf("PNG15_%s {global:\n",PNGMAJ)}\ { for (i=1;i+2<=NF;++i)\ if ($$(i)=="PNG_FUNCTION_EXPORT" && $$(i+2)=="END")\ print $$(i+1) ";";\ @@ -125,8 +129,8 @@ libpng-config: echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ echo L_opts=\"\"; \ echo R_opts=\"\"; \ - echo libs=\"-lpng14\"; \ - echo all_libs=\"-lpng14 $(LIBADDFLAGS)\"; \ + echo libs=\"-lpng15\"; \ + echo all_libs=\"-lpng15 $(LIBADDFLAGS)\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -155,12 +159,12 @@ test: pngtest pngtest-static @echo "" ./pngtest-static -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -232,7 +236,7 @@ test-installed: clean: $(RM_F) *.o libpng.a libpng.syms pngtest pngout.png libpng-config \ $(LIBSO) $(LIBSOMAJ)* pngtest-static pngtesti \ - libpng.pc + libpng.pc pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -240,20 +244,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.freebsd b/src/png/scripts/makefile.freebsd index c0014afbda..994608c993 100644 --- a/src/png/scripts/makefile.freebsd +++ b/src/png/scripts/makefile.freebsd @@ -6,7 +6,7 @@ # and license in png.h PREFIX?= /usr/local -SHLIB_VER?= 14 +SHLIB_VER?= 15 LIB= png SHLIB_MAJOR= ${SHLIB_VER} @@ -17,13 +17,14 @@ NOOBJ= YES # where make install puts libpng.a and png.h DESTDIR= ${PREFIX} LIBDIR= /lib -INCS= png.h pngconf.h pngpriv.h +INCS= png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h INCSDIR= /include/libpng INCDIR= ${INCSDIR} # for 4.x bsd.lib.mk MAN= libpng.3 libpngpf.3 png.5 MANDIR= /man/man SYMLINKS= libpng/png.h ${INCSDIR}/../png.h \ - libpng/pngconf.h ${INCSDIR}/../pngconf.h + libpng/pngconf.h ${INCSDIR}/../pngconf.h \ + libpng/pnglibconf.h ${INCSDIR}/../pnglibconf.h LDADD+= -lm -lz DPADD+= ${LIBM} ${LIBZ} @@ -41,6 +42,10 @@ CLEANFILES= pngtest pngtest.o pngout.png test: pngtest ./pngtest +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: chmod a-w *.[ch35] $(DOCS) scripts/* diff --git a/src/png/scripts/makefile.gcc b/src/png/scripts/makefile.gcc index 0ab8a3ba1b..c871f7d17d 100644 --- a/src/png/scripts/makefile.gcc +++ b/src/png/scripts/makefile.gcc @@ -41,6 +41,10 @@ OBJS = png$(O) pngerror$(O) pngget$(O) pngmem$(O) pngpread$(O) \ # Targets all: static +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + .c$(O): $(CC) -c $(CFLAGS) -I$(ZLIBINC) $< @@ -62,22 +66,22 @@ pngtest$(EXE): pngtest$(O) libpng$(A) $(LD) $(LDFLAGS) -L$(ZLIBLIB) -o $@ pngtest$(O) libpng$(A) $(LIBS) clean: - $(RM_F) *$(O) libpng$(A) pngtest$(EXE) pngout.png - -png$(O): png.h pngconf.h pngpriv.h -pngerror$(O): png.h pngconf.h pngpriv.h -pngget$(O): png.h pngconf.h pngpriv.h -pngmem$(O): png.h pngconf.h pngpriv.h -pngpread$(O): png.h pngconf.h pngpriv.h -pngread$(O): png.h pngconf.h pngpriv.h -pngrio$(O): png.h pngconf.h pngpriv.h -pngrtran$(O): png.h pngconf.h pngpriv.h -pngrutil$(O): png.h pngconf.h pngpriv.h -pngset$(O): png.h pngconf.h pngpriv.h -pngtrans$(O): png.h pngconf.h pngpriv.h -pngwio$(O): png.h pngconf.h pngpriv.h -pngwrite$(O): png.h pngconf.h pngpriv.h -pngwtran$(O): png.h pngconf.h pngpriv.h -pngwutil$(O): png.h pngconf.h pngpriv.h - -pngtest$(O): png.h pngconf.h + $(RM_F) *$(O) libpng$(A) pngtest$(EXE) pngout.png pnglibconf.h + +png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest$(O): png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.hp64 b/src/png/scripts/makefile.hp64 index cbefecaebd..b5b631d11c 100644 --- a/src/png/scripts/makefile.hp64 +++ b/src/png/scripts/makefile.hp64 @@ -1,5 +1,5 @@ # makefile for libpng, HPUX (10.20 and 11.00) using the ANSI/C product. -# Copyright (C) 1999-2002, 2006, 2009, 2010 Glenn Randers-Pehrson +# Copyright (C) 1999-2002, 2006, 2009, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1995 Guy Eric Schalnat, Group 42 # contributed by Jim Rice and updated by Chris Schleicher, Hewlett Packard # @@ -19,8 +19,8 @@ ZLIBINC=/opt/zlib/include # SHAREDLIB=libz.sl # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 +LIBNAME = libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).sl @@ -44,7 +44,7 @@ CCFLAGS=-I$(ZLIBINC) -O -Ae -Wl,+vnocompatwarnings +DD64 \ LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm -# where make install puts libpng.a, libpng14.sl, and png.h +# where make install puts libpng.a, libpng15.sl, and png.h prefix=/opt/libpng exec_prefix=$(prefix) INCPATH=$(prefix)/include @@ -80,6 +80,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -89,7 +93,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -97,7 +101,7 @@ libpng-config: echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ echo ccopts=\"-Ae +DA1.1 +DS2.0\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -114,12 +118,12 @@ pngtest: pngtest.o libpng.a test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -193,7 +197,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngtesti pngout.png \ libpng-config $(LIBSO) $(LIBSOMAJ)* \ - libpng.pc + libpng.pc pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -201,20 +205,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.hpgcc b/src/png/scripts/makefile.hpgcc index 55976f61ed..3fe21177a4 100644 --- a/src/png/scripts/makefile.hpgcc +++ b/src/png/scripts/makefile.hpgcc @@ -1,5 +1,5 @@ # makefile for libpng on HP-UX using GCC with the HP ANSI/C linker. -# Copyright (C) 2002, 2006-2008, 2010 Glenn Randers-Pehrson +# Copyright (C) 2002, 2006-2008, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 2001, Laurent faillie # Copyright (C) 1998, 1999 Greg Roelofs # Copyright (C) 1996, 1997 Andreas Dilger @@ -9,8 +9,8 @@ # and license in png.h # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 +LIBNAME = libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).sl @@ -27,7 +27,8 @@ LN_SF=ln -sf RANLIB=ranlib RM_F=/bin/rm -f -# where "make install" puts libpng.a, $(OLDSO)*, png.h and pngconf.h +# where "make install" puts libpng.a, $(OLDSO)*, png.h, pngconf.h +# and pnglibconf.h prefix=/usr/local exec_prefix=$(prefix) @@ -54,8 +55,8 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE \ $(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5 -#LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng14 -lz -lm -LDFLAGS=-L. -L$(ZLIBLIB) -lpng14 -lz -lm +#LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng15 -lz -lm +LDFLAGS=-L. -L$(ZLIBLIB) -lpng15 -lz -lm INCPATH=$(prefix)/include LIBPATH=$(exec_prefix)/lib @@ -99,13 +100,13 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ echo prefix=\"$(prefix)\"; \ echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -123,12 +124,12 @@ test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -202,7 +203,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngtesti pngout.png \ libpng-config $(LIBSO) $(LIBSOMAJ)* \ - libpng.pc + libpng.pc pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -210,20 +211,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.hpux b/src/png/scripts/makefile.hpux index d26a6008f8..650ab4f662 100644 --- a/src/png/scripts/makefile.hpux +++ b/src/png/scripts/makefile.hpux @@ -1,5 +1,5 @@ # makefile for libpng, HPUX (10.20 and 11.00) using the ANSI/C product. -# Copyright (C) 1999-2002, 2006, 2010 Glenn Randers-Pehrson +# Copyright (C) 1999-2002, 2006, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1995 Guy Eric Schalnat, Group 42 # contributed by Jim Rice and updated by Chris Schleicher, Hewlett Packard # @@ -19,8 +19,8 @@ ZLIBINC=/opt/zlib/include # SHAREDLIB=libz.sl # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 +LIBNAME = libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).sl @@ -36,7 +36,7 @@ LN_SF=ln -sf RANLIB=ranlib RM_F=/bin/rm -f -# where make install puts libpng.a, libpng14.sl, and png.h +# where make install puts libpng.a, libpng15.sl, and png.h prefix=/opt/libpng exec_prefix=$(prefix) INCPATH=$(prefix)/include @@ -77,6 +77,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -86,7 +90,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -94,7 +98,7 @@ libpng-config: echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ echo ccopts=\"-Ae +DA1.1 +DS2.0\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -111,12 +115,12 @@ pngtest: pngtest.o libpng.a test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -190,7 +194,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngtesti pngout.png \ libpng-config $(LIBSO) $(LIBSOMAJ)* \ - libpng.pc + libpng.pc pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -198,20 +202,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.ibmc b/src/png/scripts/makefile.ibmc index b0b445ab26..209d513b1c 100644 --- a/src/png/scripts/makefile.ibmc +++ b/src/png/scripts/makefile.ibmc @@ -41,6 +41,10 @@ LIBS = libpng$(A) $(ZLIBLIB)/zlib$(A) # Targets all: libpng$(A) pngtest$(E) +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng$(A): $(OBJS) $(AR) -out:$@ $(OBJS) @@ -55,23 +59,24 @@ pngtest$(E): pngtest$(O) libpng$(A) clean: $(RM) *$(O) $(RM) libpng$(A) + $(RM) pnglibconf.h $(RM) pngtest$(E) $(RM) pngout.png -png$(O): png.h pngconf.h pngpriv.h -pngerror$(O): png.h pngconf.h pngpriv.h -pngget$(O): png.h pngconf.h pngpriv.h -pngmem$(O): png.h pngconf.h pngpriv.h -pngpread$(O): png.h pngconf.h pngpriv.h -pngread$(O): png.h pngconf.h pngpriv.h -pngrio$(O): png.h pngconf.h pngpriv.h -pngrtran$(O): png.h pngconf.h pngpriv.h -pngrutil$(O): png.h pngconf.h pngpriv.h -pngset$(O): png.h pngconf.h pngpriv.h -pngtrans$(O): png.h pngconf.h pngpriv.h -pngwio$(O): png.h pngconf.h pngpriv.h -pngwrite$(O): png.h pngconf.h pngpriv.h -pngwtran$(O): png.h pngconf.h pngpriv.h -pngwutil$(O): png.h pngconf.h pngpriv.h +png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngtest$(O): png.h pngconf.h +pngtest$(O): png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.intel b/src/png/scripts/makefile.intel index fb705e121d..1cb9ef3749 100644 --- a/src/png/scripts/makefile.intel +++ b/src/png/scripts/makefile.intel @@ -44,49 +44,53 @@ pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O) all: test -png$(O): png.h pngconf.h pngpriv.h +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + +png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngset$(O): png.h pngconf.h pngpriv.h +pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngget$(O): png.h pngconf.h pngpriv.h +pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngread$(O): png.h pngconf.h pngpriv.h +pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngpread$(O): png.h pngconf.h pngpriv.h +pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngrtran$(O): png.h pngconf.h pngpriv.h +pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngrutil$(O): png.h pngconf.h pngpriv.h +pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngerror$(O): png.h pngconf.h pngpriv.h +pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngmem$(O): png.h pngconf.h pngpriv.h +pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngrio$(O): png.h pngconf.h pngpriv.h +pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngwio$(O): png.h pngconf.h pngpriv.h +pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngtrans$(O): png.h pngconf.h pngpriv.h +pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngwrite$(O): png.h pngconf.h pngpriv.h +pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngwtran$(O): png.h pngconf.h pngpriv.h +pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) -pngwutil$(O): png.h pngconf.h pngpriv.h +pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) $(CFLAGS) $*.c $(ERRFILE) libpng.lib: $(OBJS) @@ -96,7 +100,7 @@ libpng.lib: $(OBJS) pngtest.exe: pngtest.obj libpng.lib $(LD) $(LDFLAGS) /OUT:pngtest.exe pngtest.obj libpng.lib $(ZLIBLIB)\zlib.lib -pngtest$(O): png.h pngconf.h +pngtest$(O): png.h pngconf.h pnglibconf.h $(CC) $(CFLAGS) $*.c $(ERRFILE) test: pngtest.exe diff --git a/src/png/scripts/makefile.knr b/src/png/scripts/makefile.knr index 75cb1b58aa..18a39f5375 100644 --- a/src/png/scripts/makefile.knr +++ b/src/png/scripts/makefile.knr @@ -41,6 +41,10 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ all: ansi2knr libpng.a pngtest +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + # general rule to allow ansi2knr to work .c.o: ./ansi2knr $*.c T$*.c @@ -61,7 +65,7 @@ pngtest: pngtest.o libpng.a test: pngtest ./pngtest -install: libpng.a png.h pngconf.h +install: libpng.a png.h pngconf.h pnglibconf.h -@mkdir $(DESTDIR)$(INCPATH) -@mkdir $(DESTDIR)$(INCPATH)/libpng -@mkdir $(DESTDIR)$(LIBPATH) @@ -69,14 +73,16 @@ install: libpng.a png.h pngconf.h -@rm -f $(DESTDIR)$(INCPATH)/pngconf.h cp png.h $(DESTDIR)$(INCPATH)/libpng cp pngconf.h $(DESTDIR)$(INCPATH)/libpng + cp pnglibconf.h $(DESTDIR)$(INCPATH)/libpng chmod 644 $(DESTDIR)$(INCPATH)/libpng/png.h chmod 644 $(DESTDIR)$(INCPATH)/libpng/pngconf.h + chmod 644 $(DESTDIR)$(INCPATH)/libpng/pnglibconf.h (cd $(DESTDIR)$(INCPATH); ln -f -s libpng/* .) cp libpng.a $(DESTDIR)$(LIBPATH) chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a clean: - rm -f *.o libpng.a pngtest pngout.png ansi2knr + rm -f *.o libpng.a pngtest pngout.png ansi2knr pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -84,20 +90,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.linux b/src/png/scripts/makefile.linux index 3a52133297..9bea401ac6 100644 --- a/src/png/scripts/makefile.linux +++ b/src/png/scripts/makefile.linux @@ -1,5 +1,5 @@ -# makefile for libpng.a and libpng14.so on Linux ELF with gcc -# Copyright (C) 1998, 1999, 2002, 2006, 2008, 2010 Greg Roelofs and +# makefile for libpng.a and libpng15.so on Linux ELF with gcc +# Copyright (C) 1998, 1999, 2002, 2006, 2008, 2010-2011 Greg Roelofs and # Glenn Randers-Pehrson # Copyright (C) 1996, 1997 Andreas Dilger # @@ -8,9 +8,9 @@ # and license in png.h # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 -RELEASE = 4 +LIBNAME = libpng15 +PNGMAJ = 15 +RELEASE = 6 # Shared library names: LIBSO=$(LIBNAME).so @@ -26,8 +26,8 @@ LN_SF=ln -sf RANLIB=ranlib RM_F=/bin/rm -f -# where "make install" puts libpng14.a, libpng14.so*, -# libpng14/png.h and libpng14/pngconf.h +# where "make install" puts libpng15.a, libpng15.so*, +# libpng15/png.h, libpng15/pngconf.h, and libpng15/pnglibconf.h # Prefix must be a full pathname. prefix=/usr/local exec_prefix=$(prefix) @@ -51,7 +51,7 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops \ $(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5 -LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng14 -lz -lm +LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng15 -lz -lm LDFLAGS_A=-L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) libpng.a -lz -lm INCPATH=$(prefix)/include @@ -87,6 +87,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest pngtest-static libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -96,7 +100,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -104,7 +108,7 @@ libpng-config: echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ echo R_opts=\"-Wl,-rpath,$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -130,12 +134,12 @@ test: pngtest pngtest-static @echo "" ./pngtest-static -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -208,7 +212,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngout.png libpng-config \ $(LIBSO) $(LIBSOMAJ)* pngtest-static pngtesti \ - libpng.pc + libpng.pc pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -216,20 +220,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h pngtest.o: png.h pngconf.h diff --git a/src/png/scripts/makefile.mingw b/src/png/scripts/makefile.mingw deleted file mode 100644 index fac013d96d..0000000000 --- a/src/png/scripts/makefile.mingw +++ /dev/null @@ -1,282 +0,0 @@ -# makefile for mingw on x86 -# Builds both dll (with import lib) and static lib versions -# of the library, and builds two copies of pngtest: one -# statically linked and one dynamically linked. -# -# Copyright (C) 2002, 2006, 2008 Soren Anderson, Charles Wilson, -# and Glenn Randers-Pehrson, based on makefile for linux-elf w/mmx by: -# Copyright (C) 1998-2000, 2007 Greg Roelofs -# Copyright (C) 1996, 1997 Andreas Dilger -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# Built from makefile.cygwin - -# This makefile expects to be run under the MSYS shell (part of -# the MINGW project) and not under CMD.EXE which does not provide -# "cat" or "sed". - -# This makefile intends to support building outside the src directory -# if desired. When invoking it, specify an argument to SRCDIR on the -# command line that points to the top of the directory where your source -# is located. -ifdef SRCDIR -VPATH = $(SRCDIR) -else -SRCDIR = . -endif - -# Override DESTDIR= on the make install command line to easily support -# installing into a temporary location. Example: -# -# make install DESTDIR=/tmp/build/libpng -# -# If you're going to install into a temporary location -# via DESTDIR, $(DESTDIR)$(prefix) must already exist before -# you execute make install. -DESTDIR= - -# If you're using a cross-compiler, add the appropriate prefix (e.g., -# "i386-mingw32msvc-") to the following three commands: -CC=gcc -AR=ar -RANLIB=ranlib - -MKDIR_P=/bin/mkdir -pv - -# Where "make install" puts libpng*.a, *png*.dll, png.h, and pngconf.h -ifndef prefix -prefix=/usr -$(warning "You haven't specified a 'prefix=' location. Defaulting to '/usr'") -endif -exec_prefix=$(prefix) - -# Where the zlib library and include files are located -ZLIBLIB= /usr/lib -ZLIBINC= - -ALIGN= -# for i386: -#ALIGN=-malign-loops=2 -malign-functions=2 - -WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ - -Wmissing-declarations -Wtraditional -Wcast-align \ - -Wstrict-prototypes -Wmissing-prototypes #-Wconversion - -CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \ - -W -Wall -O3 $(ALIGN) -funroll-loops \ - -fomit-frame-pointer) # $(WARNMORE) -g -DPNG_DEBUG=5 - -LIBNAME = libpng14 -PNGMAJ = 14 -MINGDLL = 14 - -SHAREDLIB=libpng$(MINGDLL).dll -STATLIB=libpng.a -IMPLIB=libpng.dll.a -SHAREDDEF=libpng.def -LIBS=$(SHAREDLIB) $(STATLIB) -EXE=.exe - -LDFLAGS=$(strip -L. $(MINGW_LDFLAGS) -lpng $(addprefix -L,$(ZLIBLIB)) -lz) -LDSFLAGS=$(strip -shared -L. $(MINGW_LDFLAGS)) -LDEXTRA=-Wl,--out-implib=$(IMPLIB) $(addprefix -L,$(ZLIBLIB)) -lz - -INCPATH=$(prefix)/include -LIBPATH=$(exec_prefix)/lib - -BINPATH=$(exec_prefix)/bin -MANPATH=$(prefix)/man -MAN3PATH=$(MANPATH)/man3 -MAN5PATH=$(MANPATH)/man5 - -# cosmetic: shortened strings: -S =$(SRCDIR) -D =$(DESTDIR) -DB =$(D)$(BINPATH) -DI =$(D)$(INCPATH) -DL =$(D)$(LIBPATH) - -OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ - pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \ - pngwtran.o pngmem.o pngerror.o pngpread.o - -OBJSDLL = $(OBJS:.o=.pic.o) - -.SUFFIXES: .c .o .pic.o - -%.o : %.c - $(CC) -c $(CFLAGS) -o $@ $< -%.pic.o : CFLAGS += -DPNG_BUILD_DLL -%.pic.o : %.c - $(CC) -c $(CFLAGS) -o $@ $< - -all: all-static all-shared libpng.pc libpng-config libpng.pc libpng-config - -# Make this to verify that "make [...] install" will do what you want. -buildsetup-tell: - @echo VPATH is set to: \"$(VPATH)\" - @echo prefix is set to: \"$(prefix)\" - @echo -e INCPATH,LIBPATH, etc. are set to:'\n' \ - $(addprefix $(D),$(INCPATH)'\n' $(LIBPATH)'\n' $(BINPATH)'\n' \ - $(MANPATH)'\n' $(MAN3PATH)'\n' $(MAN5PATH)'\n')'\n' - -libpng.pc: scripts/libpng.pc.in - @echo -e Making pkg-config file for this libpng installation..'\n' \ - using PREFIX=\"$(prefix)\"'\n' - cat scripts/libpng.pc.in | sed -e s!@prefix@!$(prefix)! \ - -e s!@exec_prefix@!$(exec_prefix)! \ - -e s!@libdir@!$(LIBPATH)! \ - -e s!@includedir@!$(INCPATH)! \ - -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc - -libpng-config: scripts/libpng-config-head.in scripts/libpng-config-body.in - @echo -e Making $(LIBNAME) libpng-config file for this libpng \ - installation..'\n' using PREFIX=\"$(prefix)\"'\n' - ( cat $(S)/scripts/libpng-config-head.in; \ - echo prefix=\"$(prefix)\"; \ - echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ - echo L_opts=\"-L$(LIBPATH)\"; \ - echo libs=\"-lpng$(MINGDLL) -lz\"; \ - cat $(S)/scripts/libpng-config-body.in ) > libpng-config - chmod +x libpng-config - -static: all-static -shared: all-shared -all-static: $(STATLIB) pngtest-stat$(EXE) -all-shared: $(SHAREDLIB) pngtest$(EXE) - -$(STATLIB): $(OBJS) - $(AR) rc $@ $(OBJS) - $(RANLIB) $@ - -$(SHAREDDEF): scripts/pngwin.def - cat $< | sed -e '1{G;s/^\(.*\)\(\n\)/EXPORTS/;};2,/^EXPORTS/d' | \ - sed -e 's/\([^;]*\);/;/' > $@ - -$(SHAREDLIB): $(OBJSDLL) $(SHAREDDEF) - $(CC) $(LDSFLAGS) -o $@ $(OBJSDLL) -L. $(LDEXTRA) - -pngtest$(EXE): pngtest.pic.o $(SHAREDLIB) - $(CC) $(CFLAGS) $< $(LDFLAGS) -o $@ - -pngtest-stat$(EXE): pngtest.o $(STATLIB) - $(CC) -static $(CFLAGS) $< $(LDFLAGS) -o $@ - -test: test-static test-shared - -test-static: pngtest-stat$(EXE) - ./pngtest-stat $(S)/pngtest.png - -test-shared: pngtest$(EXE) - ./pngtest $(S)/pngtest.png - -install-static: $(STATLIB) install-headers install-man - -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi - install -m 644 $(STATLIB) $(DL)/$(LIBNAME).a - -@rm -f $(DL)/$(STATLIB) - (cd $(DL); ln -sf $(LIBNAME).a $(STATLIB)) - -install-shared: $(SHAREDLIB) libpng.pc libpng-config install-headers install-man - -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi - -@if [ ! -d $(DB) ]; then $(MKDIR_P) $(DB); fi - -@if [ ! -d $(DL)/pkgconfig ]; then $(MKDIR_P) $(DL)/pkgconfig; fi - -@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc - -@/bin/rm -f $(DL)/pkgconfig/libpng.pc - install -m 644 $(IMPLIB) $(DL)/$(LIBNAME).dll.a - -@rm -f $(DL)/$(IMPLIB) - (cd $(DL); ln -sf $(LIBNAME).dll.a $(IMPLIB)) - install -s -m 755 $(SHAREDLIB) $(DB) - install -m 644 libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc - (cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc) - -install-headers: - -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi - -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - -@rm -f $(DI)/png.h - -@rm -f $(DI)/pngconf.h - install -m 644 $(S)/png.h $(S)/pngconf.h $(DI)/$(LIBNAME) - -@rm -f $(DI)/libpng - (cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .) - -install-man: - -@if [ ! -d $(D)$(MAN3PATH) ]; then $(MKDIR_P) $(D)$(MAN3PATH); fi - -@if [ ! -d $(D)$(MAN5PATH) ]; then $(MKDIR_P) $(D)$(MAN5PATH); fi - install -m 644 $(S)/libpngpf.3 $(S)/libpng.3 $(D)$(MAN3PATH) - install -m 644 $(S)/png.5 $(D)$(MAN5PATH) - -install-config: libpng-config - -@if [ ! -d $(DB) ]; then $(MKDIR_P) $(DB); fi - -@/bin/rm -f $(DB)/libpng-config - -@/bin/rm -f $(DB)/$(LIBNAME)-config - cp libpng-config $(DB)/$(LIBNAME)-config - chmod 755 $(DB)/$(LIBNAME)-config - (cd $(DB); ln -sf $(LIBNAME)-config libpng-config) - -# Run this to verify that a future `configure' run will pick up the settings -# you want. -test-config-install: SHELL=/bin/bash -test-config-install: $(DB)/libpng-config - @echo -e Testing libpng-config functions...'\n' - @ for TYRA in LDFLAGS CPPFLAGS CFLAGS LIBS VERSION; \ - do \ - printf "(%d)\t %10s =%s\n" $$(($$gytiu + 1)) $$TYRA \ - "$$($(DB)/libpng-config `echo --$$TYRA |tr '[:upper:]' '[:lower:]'`)"; \ - gytiu=$$(( $$gytiu + 1 )); \ - done - -install: install-static install-shared install-man install-config - -# If you installed in $(DESTDIR), test-installed won't work until you -# move the library to its final location. Use test-dd to test it -# before then. - -test-dd: - echo - echo Testing installed dynamic shared library in $(DL). - $(CC) -I$(DI) $(CFLAGS) \ - `$(BINPATH)/libpng14-config --cflags` pngtest.c \ - -L$(DL) -L$(ZLIBLIB) \ - -o pngtestd `$(BINPATH)/libpng14-config --ldflags` - ./pngtestd pngtest.png - -test-installed: - $(CC) $(CFLAGS) \ - `$(BINPATH)/libpng14-config --cflags` pngtest.c \ - -L$(ZLIBLIB) \ - -o pngtesti$(EXE) `$(BINPATH)/libpng14-config --ldflags` - ./pngtesti$(EXE) pngtest.png - -clean: - /bin/rm -f *.pic.o *.o $(STATLIB) $(IMPLIB) $(SHAREDLIB) \ - pngtest-stat$(EXE) pngtest$(EXE) pngout.png $(SHAREDDEF) \ - libpng-config libpng.pc pngtesti$(EXE) - -DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO -writelock: - chmod a-w *.[ch35] $(DOCS) scripts/* - -.PHONY: buildsetup-tell libpng.pc libpng-config test-config-install clean - -# DO NOT DELETE THIS LINE -- make depend depends on it. - -png.o png.pic.o: png.h pngconf.h pngpriv.h png.c -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h pngerror.c -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h pngrio.c -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h pngwio.c -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h pngmem.c -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h pngset.c -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h pngget.c -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h pngread.c -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h pngrtran.c -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h pngrutil.c -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h pngtrans.c -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h pngwrite.c -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h pngwtran.c -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h pngwutil.c -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h pngpread.c - -pngtest.o pngtest.pic.o: png.h pngconf.h pngtest.c diff --git a/src/png/scripts/makefile.mips b/src/png/scripts/makefile.mips index 5e1040ed4c..179d3850b6 100644 --- a/src/png/scripts/makefile.mips +++ b/src/png/scripts/makefile.mips @@ -35,6 +35,10 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ all: libpng.a pngtest +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) ar rc $@ $(OBJS) $(RANLIB) $@ @@ -51,16 +55,19 @@ install: libpng.a -@mkdir $(DESTDIR)$(LIBPATH) -@rm -f $(DESTDIR)$(INCPATH)/png.h -@rm -f $(DESTDIR)$(INCPATH)/pngconf.h + -@rm -f $(DESTDIR)$(INCPATH)/pnglibconf.h cp png.h $(DESTDIR)$(INCPATH)/libpng cp pngconf.h $(DESTDIR)$(INCPATH)/libpng + cp pnglibconf.h $(DESTDIR)$(INCPATH)/libpng chmod 644 $(DESTDIR)$(INCPATH)/libpng/png.h chmod 644 $(DESTDIR)$(INCPATH)/libpng/pngconf.h + chmod 644 $(DESTDIR)$(INCPATH)/libpng/pnglibconf.h (cd $(DESTDIR)$(INCPATH); ln -f -s libpng/* .) cp libpng.a $(DESTDIR)$(LIBPATH) chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a clean: - rm -f *.o libpng.a pngtest pngout.png + rm -f *.o libpng.a pngtest pngout.png pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -68,20 +75,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.msc b/src/png/scripts/makefile.msc index e74464440e..baa863dad9 100644 --- a/src/png/scripts/makefile.msc +++ b/src/png/scripts/makefile.msc @@ -27,49 +27,53 @@ OBJS3 = pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O) all: libpng.lib -png$(O): png.h pngconf.h pngpriv.h +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + +png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngset$(O): png.h pngconf.h pngpriv.h +pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngget$(O): png.h pngconf.h pngpriv.h +pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngread$(O): png.h pngconf.h pngpriv.h +pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngpread$(O): png.h pngconf.h pngpriv.h +pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngrtran$(O): png.h pngconf.h pngpriv.h +pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngrutil$(O): png.h pngconf.h pngpriv.h +pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngerror$(O): png.h pngconf.h pngpriv.h +pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngmem$(O): png.h pngconf.h pngpriv.h +pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngrio$(O): png.h pngconf.h pngpriv.h +pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngwio$(O): png.h pngconf.h pngpriv.h +pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngtrans$(O): png.h pngconf.h pngpriv.h +pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngwrite$(O): png.h pngconf.h pngpriv.h +pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngwtran$(O): png.h pngconf.h pngpriv.h +pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngwutil$(O): png.h pngconf.h pngpriv.h +pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) libpng.lib: $(OBJS1) $(OBJS2) $(OBJS3) @@ -78,7 +82,7 @@ libpng.lib: $(OBJS1) $(OBJS2) $(OBJS3) lib libpng $(OBJS2); lib libpng $(OBJS3); -pngtest$(O): png.h pngconf.h +pngtest$(O): png.h pngconf.h pnglibconf.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) pngtest.exe: pngtest.obj libpng.lib diff --git a/src/png/scripts/makefile.ne12bsd b/src/png/scripts/makefile.ne12bsd index bf6ac2d621..dde794a1a2 100644 --- a/src/png/scripts/makefile.ne12bsd +++ b/src/png/scripts/makefile.ne12bsd @@ -13,15 +13,15 @@ LOCALBASE?=/usr/local LIBDIR= ${LOCALBASE}/lib MANDIR= ${LOCALBASE}/man -INCSDIR=${LOCALBASE}/include/libpng14 +INCSDIR=${LOCALBASE}/include/libpng15 -LIB= png14 +LIB= png15 SHLIB_MAJOR= 0 -SHLIB_MINOR= 1.4.4 +SHLIB_MINOR= 1.5.6 SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \ pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \ pngwtran.c pngmem.c pngerror.c pngpread.c -INCS= png.h pngconf.h +INCS= png.h pngconf.h pnglibconf.h MAN= libpng.3 libpngpf.3 png.5 CPPFLAGS+=-I${.CURDIR} @@ -32,7 +32,11 @@ CPPFLAGS+=-I${.CURDIR} # MKLINT= no # .endif -CLEANFILES+=pngtest.o pngtest +CLEANFILES+=pngtest.o pngtest pnglibconf.h + +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ pngtest.o: pngtest.c ${CC} -c ${CPPFLAGS} ${CFLAGS} ${.ALLSRC} -o ${.TARGET} diff --git a/src/png/scripts/makefile.netbsd b/src/png/scripts/makefile.netbsd index e75378035c..1b9967f389 100644 --- a/src/png/scripts/makefile.netbsd +++ b/src/png/scripts/makefile.netbsd @@ -8,7 +8,7 @@ # For conditions of distribution and use, see the disclaimer # and license in png.h -# You should also run makefile.ne14bsd +# You should also run makefile.ne15bsd LOCALBASE?=/usr/local LIBDIR= ${LOCALBASE}/lib @@ -16,12 +16,12 @@ MANDIR= ${LOCALBASE}/man INCSDIR=${LOCALBASE}/include LIB= png -SHLIB_MAJOR= 3 -SHLIB_MINOR= 1.4.4 +SHLIB_MAJOR= 15 +SHLIB_MINOR= 1.5.6 SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \ pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \ pngwtran.c pngmem.c pngerror.c pngpread.c -INCS= png.h pngconf.h +INCS= png.h pngconf.h pnglibconf.h MAN= libpng.3 libpngpf.3 png.5 CPPFLAGS+=-I${.CURDIR} @@ -32,7 +32,11 @@ CPPFLAGS+=-I${.CURDIR} # MKLINT= no # .endif -CLEANFILES+=pngtest.o pngtest +CLEANFILES+=pngtest.o pngtest pnglibconf.h + +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ pngtest.o: pngtest.c ${CC} -c ${CPPFLAGS} ${CFLAGS} ${.ALLSRC} -o ${.TARGET} diff --git a/src/png/scripts/makefile.openbsd b/src/png/scripts/makefile.openbsd index 33f1c35b2f..2f58891293 100644 --- a/src/png/scripts/makefile.openbsd +++ b/src/png/scripts/makefile.openbsd @@ -10,25 +10,30 @@ PREFIX?= /usr/local LIBDIR= ${PREFIX}/lib MANDIR= ${PREFIX}/man/cat -SHLIB_MAJOR= 0 -SHLIB_MINOR= 1.4.4 +SHLIB_MAJOR= 15 +SHLIB_MINOR= 1.5.6 LIB= png SRCS= png.c pngerror.c pngget.c pngmem.c pngpread.c \ pngread.c pngrio.c pngrtran.c pngrutil.c pngset.c pngtrans.c \ pngwio.c pngwrite.c pngwtran.c pngwutil.c -HDRS= png.h pngconf.h +HDRS= png.h pngconf.h pnglibconf.h CFLAGS+= -W -Wall CPPFLAGS+= -I${.CURDIR} NOPROFILE= Yes -CLEANFILES+= pngtest.o pngtest +CLEANFILES+= pngtest.o pngtest pnglibconf.h MAN= libpng.3 libpngpf.3 png.5 -DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO libpng.txt +DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO \ + libpng-manual.txt + +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ pngtest.o: pngtest.c ${CC} ${CPPFLAGS} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET} @@ -65,6 +70,7 @@ afterinstall: @rm -f ${DESTDIR}${LIBDIR}/debug/libpng.a @rm -f ${DESTDIR}${PREFIX}/include/png.h @rm -f ${DESTDIR}${PREFIX}/include/pngconf.h + @rm -f ${DESTDIR}${PREFIX}/include/pnglibconf.h @rmdir ${DESTDIR}${LIBDIR}/debug 2>/dev/null || true ${INSTALL} ${INSTALL_COPY} -o ${SHAREOWN} -g ${SHAREGRP} \ -m ${NONBINMODE} ${HDRS} ${DESTDIR}${PREFIX}/include diff --git a/src/png/scripts/makefile.os2 b/src/png/scripts/makefile.os2 deleted file mode 100644 index affb03c1a7..0000000000 --- a/src/png/scripts/makefile.os2 +++ /dev/null @@ -1,72 +0,0 @@ -# makefile for libpng on OS/2 with gcc -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# Related files: pngos2.def - -CC=gcc -Zomf -s - -# Where the zlib library and include files are located -ZLIBLIB=../zlib -ZLIBINC=../zlib - -WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ - -Wmissing-declarations -Wtraditional -Wcast-align \ - -Wstrict-prototypes -Wmissing-prototypes #-Wconversion -CFLAGS=-I$(ZLIBINC) -W -Wall -O6 -funroll-loops -malign-loops=2 \ - -malign-functions=2 #$(WARNMORE) -g -DPNG_DEBUG=5 -LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lzdll -Zcrtdll -AR=emxomfar - -PNGLIB=png.lib -IMPLIB=emximp -SHAREDLIB=png.dll -SHAREDLIBIMP=pngdll.lib - -OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ - pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \ - pngwtran.o pngmem.o pngerror.o pngpread.o - -.SUFFIXES: .c .o - -all: $(PNGLIB) $(SHAREDLIB) $(SHAREDLIBIMP) - -$(PNGLIB): $(OBJS) - $(AR) rc $@ $(OBJS) - -$(SHAREDLIB): $(OBJS) pngos2.def - $(CC) $(LDFLAGS) -Zdll -o $@ $^ - -$(SHAREDLIBIMP): pngos2.def - $(IMPLIB) -o $@ $^ - -pngtest.exe: pngtest.o png.dll pngdll.lib - $(CC) -o $@ $(CFLAGS) $< $(LDFLAGS) - -test: pngtest.exe - ./pngtest.exe - -clean: - rm -f *.o $(PNGLIB) png.dll pngdll.lib pngtest.exe pngout.png - -# DO NOT DELETE THIS LINE -- make depend depends on it. - -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h diff --git a/src/png/scripts/makefile.sco b/src/png/scripts/makefile.sco index 1dcb7d96b5..0aad789a98 100644 --- a/src/png/scripts/makefile.sco +++ b/src/png/scripts/makefile.sco @@ -1,7 +1,7 @@ # makefile for SCO OSr5 ELF and Unixware 7 with Native cc # Contributed by Mike Hopkirk (hops@sco.com) modified from Makefile.lnx # force ELF build dynamic linking, SONAME setting in lib and RPATH in app -# Copyright (C) 2002, 2006, 2010 Glenn Randers-Pehrson +# Copyright (C) 2002, 2006, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1998 Greg Roelofs # Copyright (C) 1996, 1997 Andreas Dilger # @@ -10,8 +10,8 @@ # and license in png.h # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 +LIBNAME = libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).so @@ -38,7 +38,7 @@ ZLIBLIB=../zlib ZLIBINC=../zlib CFLAGS= -dy -belf -I$(ZLIBINC) -O3 -LDFLAGS=-L. -L$(ZLIBLIB) -lpng14 -lz -lm +LDFLAGS=-L. -L$(ZLIBLIB) -lpng15 -lz -lm INCPATH=$(prefix)/include LIBPATH=$(exec_prefix)/lib @@ -73,6 +73,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -82,7 +86,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -90,7 +94,7 @@ libpng-config: echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ echo ccopts=\"-belf\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -107,14 +111,15 @@ pngtest: pngtest.o $(LIBSO) test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi -@$(RM_F) $(DI)/png.h -@$(RM_F) $(DI)/pngconf.h - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + -@$(RM_F) $(DI)/pnglibconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -186,7 +191,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngout.png libpng-config \ $(LIBSO) $(LIBSOMAJ)* pngtest-static pngtesti \ - libpng.pc + pnglibconf.h libpng.pc DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -194,20 +199,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.sggcc b/src/png/scripts/makefile.sggcc index 2a49fb9c8f..1611638ba6 100644 --- a/src/png/scripts/makefile.sggcc +++ b/src/png/scripts/makefile.sggcc @@ -1,5 +1,5 @@ -# makefile for libpng.a and libpng14.so, SGI IRIX with 'cc' -# Copyright (C) 2001-2002, 2006, 2010 Glenn Randers-Pehrson +# makefile for libpng.a and libpng15.so, SGI IRIX with 'cc' +# Copyright (C) 2001-2002, 2006, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc. # # This code is released under the libpng license. @@ -7,8 +7,8 @@ # and license in png.h # Library name: -LIBNAME=libpng14 -PNGMAJ = 14 +LIBNAME=libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).so @@ -24,7 +24,7 @@ LN_SF=ln -sf RANLIB=echo RM_F=/bin/rm -f -# Where make install puts libpng.a, libpng14.so, and libpng14/png.h +# Where make install puts libpng.a, libpng15.so, and libpng15/png.h # Prefix must be a full pathname. prefix=/usr/local @@ -46,7 +46,7 @@ WARNMORE= # -g -DPNG_DEBUG=5 CFLAGS=$(ABI) -I$(ZLIBINC) -O $(WARNMORE) -fPIC -mabi=n32 LDFLAGS=$(ABI) -L. -L$(ZLIBLIB) -lpng -lz -lm LDSHARED=cc $(ABI) -shared -soname $(LIBSOMAJ) \ - -set_version sgi$(PNGMAJ).0 + -set_version sgi$(PNGMAJ).0 # See "man dso" for info about shared objects INCPATH=$(prefix)/include @@ -76,6 +76,10 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ all: libpng.a pngtest shared libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -87,7 +91,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -98,7 +102,7 @@ libpng-config: echo ldopts=\"$(ABI)\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ echo libdir=\"$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -117,12 +121,12 @@ test: pngtest echo Testing local static library. ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -181,7 +185,7 @@ test-dd: $(CC) -I$(DI) -I$(ZLIBINC) \ `$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \ -L$(DL) -L$(ZLIBLIB) \ - -rpath $(ZLIBLIB):$(DL) \ + -rpath $(ZLIBLIB):$(DL) \ -o pngtestd `$(BINPATH)/$(LIBNAME)-config --ldflags` ./pngtestd pngtest.png @@ -191,13 +195,13 @@ test-installed: $(CC) -I$(ZLIBINC) \ `$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \ -L$(ZLIBLIB) \ - -rpath $(ZLIBLIB):`$(BINPATH)/$(LIBNAME)-config --libdir` \ + -rpath $(ZLIBLIB):`$(BINPATH)/$(LIBNAME)-config --libdir` \ -o pngtesti `$(BINPATH)/$(LIBNAME)-config --ldflags` ./pngtesti pngtest.png clean: $(RM_F) libpng.a pngtest pngtesti pngout.png libpng.pc \ - so_locations libpng-config $(LIBSO) $(LIBSOMAJ)* + so_locations libpng-config $(LIBSO) $(LIBSOMAJ)* pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -205,20 +209,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.sgi b/src/png/scripts/makefile.sgi index 0c381da74d..83db59f817 100644 --- a/src/png/scripts/makefile.sgi +++ b/src/png/scripts/makefile.sgi @@ -1,5 +1,5 @@ -# makefile for libpng.a and libpng14.so, SGI IRIX with 'cc' -# Copyright (C) 2001-2002, 2006, 2007, 2010 Glenn Randers-Pehrson +# makefile for libpng.a and libpng15.so, SGI IRIX with 'cc' +# Copyright (C) 2001-2002, 2006, 2007, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc. # # This code is released under the libpng license. @@ -7,8 +7,8 @@ # and license in png.h # Library name: -LIBNAME=libpng14 -PNGMAJ = 14 +LIBNAME=libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).so @@ -24,7 +24,7 @@ LN_SF=ln -sf RANLIB=echo RM_F=/bin/rm -f -# Where make install puts libpng.a, libpng14.so, and libpng14/png.h +# Where make install puts libpng.a, libpng15.so, and libpng15/png.h # Prefix must be a full pathname. prefix=/usr/local @@ -46,10 +46,10 @@ WARNMORE=-fullwarn # Note: -KPIC is the default anyhow #CFLAGS= $(ABI) -I$(ZLIBINC) -O $(WARNMORE) -KPIC # -g -DPNG_DEBUG=5 CFLAGS=$(ABI) -I$(ZLIBINC) -O $(WARNMORE) -LDFLAGS_A=$(ABI) -L. -L$(ZLIBLIB) -lpng14 -lz -lm +LDFLAGS_A=$(ABI) -L. -L$(ZLIBLIB) -lpng15 -lz -lm LDFLAGS=$(ABI) -L. -L$(ZLIBLIB) -lpng -lz -lm LDSHARED=cc $(ABI) -shared -soname $(LIBSOMAJ) \ - -set_version sgi$(PNGMAJ).0 + -set_version sgi$(PNGMAJ).0 # See "man dso" for info about shared objects INCPATH=$(prefix)/include @@ -79,6 +79,10 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ all: libpng.a pngtest shared libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -88,7 +92,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -98,7 +102,7 @@ libpng-config: echo ldopts=\"$(ABI)\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ echo libdir=\"$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -117,12 +121,12 @@ test: pngtest echo Testing local static library. ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -181,7 +185,7 @@ test-dd: $(CC) -I$(DI) -I$(ZLIBINC) \ `$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \ -L$(DL) -L$(ZLIBLIB) \ - -rpath $(ZLIBLIB):$(DL) \ + -rpath $(ZLIBLIB):$(DL) \ -o pngtestd `$(BINPATH)/$(LIBNAME)-config --ldflags` ./pngtestd pngtest.png @@ -191,14 +195,14 @@ test-installed: $(CC) -I$(ZLIBINC) \ `$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \ -L$(ZLIBLIB) \ - -rpath $(ZLIBLIB):`$(BINPATH)/$(LIBNAME)-config --libdir` \ + -rpath $(ZLIBLIB):`$(BINPATH)/$(LIBNAME)-config --libdir` \ -o pngtesti `$(BINPATH)/$(LIBNAME)-config --ldflags` ./pngtesti pngtest.png clean: $(RM_F) *.o libpng.a pngtest pngtesti pngout.png libpng.pc libpng-config \ $(LIBSO) $(LIBSOMAJ)* \ - so_locations + so_locations pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -206,20 +210,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.so9 b/src/png/scripts/makefile.so9 index fd52e3d2c3..615c2e3458 100644 --- a/src/png/scripts/makefile.so9 +++ b/src/png/scripts/makefile.so9 @@ -1,7 +1,7 @@ # makefile for libpng on Solaris 9 (beta) with Forte cc # Updated by Chad Schrock for Solaris 9 # Contributed by William L. Sebok, based on makefile.linux -# Copyright (C) 2002, 2006, 2008, 2010 Glenn Randers-Pehrson +# Copyright (C) 2002, 2006, 2008, 2010-2011 Glenn Randers-Pehrson # Copyright (C) 1998-2001 Greg Roelofs # Copyright (C) 1996-1997 Andreas Dilger # @@ -10,8 +10,8 @@ # and license in png.h # Library name: -PNGMAJ = 14 -LIBNAME = libpng14 +PNGMAJ = 15 +LIBNAME = libpng15 # Shared library names: LIBSO=$(LIBNAME).so @@ -48,7 +48,7 @@ ZLIBINC=/usr/include -Wstrict-prototypes -Wmissing-prototypes #-Wconversion #CFLAGS=-I$(ZLIBINC) -W -Wall -O3 $(WARNMORE) -g -DPNG_DEBUG=5 -DPNG_NO_MMX_CODE CFLAGS=-I$(ZLIBINC) -O3 -DPNG_NO_MMX_CODE -LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng14 -lz -lm +LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng15 -lz -lm INCPATH=$(prefix)/include LIBPATH=$(exec_prefix)/lib @@ -83,6 +83,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -92,7 +96,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -100,7 +104,7 @@ libpng-config: echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ echo R_opts=\"-R$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -129,12 +133,12 @@ pngtest: pngtest.o $(LIBSO) test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -208,7 +212,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngtesti pngout.png \ libpng-config $(LIBSO) $(LIBSOMAJ)* \ - libpng.pc + libpng.pc pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -216,20 +220,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.solaris b/src/png/scripts/makefile.solaris index fe9405e97f..24bd61033c 100644 --- a/src/png/scripts/makefile.solaris +++ b/src/png/scripts/makefile.solaris @@ -1,5 +1,5 @@ # makefile for libpng on Solaris 2.x with gcc -# Copyright (C) 2004, 2006-2008, 2010 Glenn Randers-Pehrson +# Copyright (C) 2004, 2006-2008, 2010-2011 Glenn Randers-Pehrson # Contributed by William L. Sebok, based on makefile.linux # Copyright (C) 1998 Greg Roelofs # Copyright (C) 1996, 1997 Andreas Dilger @@ -9,8 +9,8 @@ # and license in png.h # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 +LIBNAME = libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).so @@ -26,7 +26,7 @@ LN_SF=ln -f -s RANLIB=echo RM_F=/bin/rm -f -# Where make install puts libpng.a, libpng14.so*, and png.h +# Where make install puts libpng.a, libpng15.so*, and png.h prefix=/usr/local exec_prefix=$(prefix) @@ -44,7 +44,7 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ -Wstrict-prototypes -Wmissing-prototypes #-Wconversion CFLAGS=-I$(ZLIBINC) -W -Wall -O \ # $(WARNMORE) -g -DPNG_DEBUG=5 -LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng14 -lz -lm +LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng15 -lz -lm INCPATH=$(prefix)/include LIBPATH=$(exec_prefix)/lib @@ -79,6 +79,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -88,7 +92,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -97,7 +101,7 @@ libpng-config: echo cppflags=\"\"; \ echo L_opts=\"-L$(LIBPATH)\"; \ echo R_opts=\"-R$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -126,12 +130,12 @@ pngtest: pngtest.o $(LIBSO) test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -205,7 +209,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngtesti pngout.png \ libpng-config $(LIBSO) $(LIBSOMAJ)* \ - libpng.pc + libpng.pc pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -213,20 +217,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.solaris-x86 b/src/png/scripts/makefile.solaris-x86 index e98b292939..76467622a8 100644 --- a/src/png/scripts/makefile.solaris-x86 +++ b/src/png/scripts/makefile.solaris-x86 @@ -1,5 +1,5 @@ # makefile for libpng on Solaris 2.x with gcc -# Copyright (C) 2004, 2006-2008, 2010 Glenn Randers-Pehrson +# Copyright (C) 2004, 2006-2008, 2010-2011 Glenn Randers-Pehrson # Contributed by William L. Sebok, based on makefile.linux # Copyright (C) 1998 Greg Roelofs # Copyright (C) 1996, 1997 Andreas Dilger @@ -9,8 +9,8 @@ # and license in png.h # Library name: -LIBNAME = libpng14 -PNGMAJ = 14 +LIBNAME = libpng15 +PNGMAJ = 15 # Shared library names: LIBSO=$(LIBNAME).so @@ -26,7 +26,7 @@ LN_SF=ln -f -s RANLIB=echo RM_F=/bin/rm -f -# Where make install puts libpng.a, libpng14.so*, and png.h +# Where make install puts libpng.a, libpng15.so*, and png.h prefix=/usr/local exec_prefix=$(prefix) @@ -44,7 +44,7 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ -Wstrict-prototypes -Wmissing-prototypes #-Wconversion CFLAGS=-I$(ZLIBINC) -W -Wall -O \ # $(WARNMORE) -g -DPNG_DEBUG=5 -LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng14 -lz -lm +LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng15 -lz -lm INCPATH=$(prefix)/include LIBPATH=$(exec_prefix)/lib @@ -79,6 +79,10 @@ OBJSDLL = $(OBJS:.o=.pic.o) all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -88,7 +92,7 @@ libpng.pc: -e s!@exec_prefix@!$(exec_prefix)! \ -e s!@libdir@!$(LIBPATH)! \ -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng14!-lpng14\ -lz\ -lm! > libpng.pc + -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc libpng-config: ( cat scripts/libpng-config-head.in; \ @@ -97,7 +101,7 @@ libpng-config: echo cppflags=\""; \ echo L_opts=\"-L$(LIBPATH)\"; \ echo R_opts=\"-R$(LIBPATH)\"; \ - echo libs=\"-lpng14 -lz -lm\"; \ + echo libs=\"-lpng15 -lz -lm\"; \ cat scripts/libpng-config-body.in ) > libpng-config chmod +x libpng-config @@ -126,12 +130,12 @@ pngtest: pngtest.o $(LIBSO) test: pngtest ./pngtest -install-headers: png.h pngconf.h +install-headers: png.h pngconf.h pnglibconf.h -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h + cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) + chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h + -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h -@$(RM_F) $(DI)/libpng (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) @@ -205,7 +209,7 @@ test-installed: clean: $(RM_F) *.o libpng.a pngtest pngtesti pngout.png \ libpng-config $(LIBSO) $(LIBSOMAJ)* \ - libpng.pc + libpng.pc pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -213,20 +217,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o png.pic.o: png.h pngconf.h pngpriv.h -pngerror.o pngerror.pic.o: png.h pngconf.h pngpriv.h -pngrio.o pngrio.pic.o: png.h pngconf.h pngpriv.h -pngwio.o pngwio.pic.o: png.h pngconf.h pngpriv.h -pngmem.o pngmem.pic.o: png.h pngconf.h pngpriv.h -pngset.o pngset.pic.o: png.h pngconf.h pngpriv.h -pngget.o pngget.pic.o: png.h pngconf.h pngpriv.h -pngread.o pngread.pic.o: png.h pngconf.h pngpriv.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pngpriv.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pngpriv.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pngpriv.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pngpriv.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pngpriv.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pngpriv.h -pngpread.o pngpread.pic.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.std b/src/png/scripts/makefile.std index afb885ad0f..30e1646436 100644 --- a/src/png/scripts/makefile.std +++ b/src/png/scripts/makefile.std @@ -33,7 +33,12 @@ MKDIR_P=mkdir LN_SF=ln -sf RANLIB=ranlib RM_F=rm -f +AWK = awk +SED = sed +CPP = $(CC) -E +ECHO = echo +DFNFLAGS = # DFNFLAGS contains -D options to use in the libpng build CFLAGS=-I$(ZLIBINC) -O # -g -DPNG_DEBUG=5 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm @@ -43,6 +48,26 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ all: libpng.a pngtest +# The standard pnglibconf.h exists as scripts/pnglibconf.h.prebuilt, +# copy this if the following doesn't work. +pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk + $(RM_F) $@ dfn?.out + $(AWK) -f scripts/options.awk out=dfn1.out\ + scripts/pnglibconf.dfa $(DFA_XTRA) 1>&2 + $(AWK) -f scripts/options.awk out=dfn2.out dfn1.out 1>&2 + cp dfn2.out $@ + $(RM_F) dfn?.out + +pnglibconf.h: pnglibconf.dfn + $(RM_F) $@ dfn.c dfn?.out + $(ECHO) '#include "pnglibconf.dfn"' >dfn.c + $(CPP) $(DFNFLAGS) dfn.c >dfn1.out + $(SED) -n -e 's|^.*PNG_DEFN_MAGIC-\(.*\)-PNG_DEFN_END.*$$|\1|p'\ + dfn1.out >dfn2.out + $(SED) -e 's| *@@@ *||g' -e 's| *$$||' dfn2.out >dfn3.out + cp dfn3.out $@ + $(RM_F) dfn.c dfn?.out + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -53,22 +78,25 @@ pngtest: pngtest.o libpng.a test: pngtest ./pngtest -install: libpng.a +install: libpng.a pnglibconf.h -@$(MKDIR_P) $(DESTDIR)$(INCPATH) -@$(MKDIR_P) $(DESTDIR)$(INCPATH)/libpng -@$(MKDIR_P) $(DESTDIR)$(LIBPATH) -@$(RM_F) $(DESTDIR)$(INCPATH)/png.h -@$(RM_F) $(DESTDIR)$(INCPATH)/pngconf.h + -@$(RM_F) $(DESTDIR)$(INCPATH)/pnglibconf.h cp png.h $(DESTDIR)$(INCPATH)/libpng cp pngconf.h $(DESTDIR)$(INCPATH)/libpng + cp pnglibconf.h $(DESTDIR)$(INCPATH)/libpng chmod 644 $(DESTDIR)$(INCPATH)/libpng/png.h chmod 644 $(DESTDIR)$(INCPATH)/libpng/pngconf.h + chmod 644 $(DESTDIR)$(INCPATH)/libpng/pnglibconf.h (cd $(DESTDIR)$(INCPATH); ln -f -s libpng/* .) cp libpng.a $(DESTDIR)$(LIBPATH) chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a clean: - $(RM_F) *.o libpng.a pngtest pngout.png + $(RM_F) *.o libpng.a pngtest pngout.png pnglibconf.* dfn.c dfn?.out DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -76,20 +104,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.sunos b/src/png/scripts/makefile.sunos index 984379c0c5..383954987e 100644 --- a/src/png/scripts/makefile.sunos +++ b/src/png/scripts/makefile.sunos @@ -48,6 +48,10 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ all: libpng.a pngtest +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + libpng.a: $(OBJS) $(AR_RC) $@ $(OBJS) $(RANLIB) $@ @@ -64,16 +68,19 @@ install: libpng.a -@$(MKDIR_P) $(DESTDIR)$(LIBPATH) -@$(RM_F) $(DESTDIR)$(INCPATH)/png.h -@$(RM_F) $(DESTDIR)$(INCPATH)/pngconf.h + -@$(RM_F) $(DESTDIR)$(INCPATH)/pnglibconf.h cp png.h $(DESTDIR)$(INCPATH)/libpng cp pngconf.h $(DESTDIR)$(INCPATH)/libpng + cp pnglibconf.h $(DESTDIR)$(INCPATH)/libpng chmod 644 $(DESTDIR)$(INCPATH)/libpng/png.h chmod 644 $(DESTDIR)$(INCPATH)/libpng/pngconf.h + chmod 644 $(DESTDIR)$(INCPATH)/libpng/pnglibconf.h (cd $(DESTDIR)$(INCPATH); $(LN_SF) libpng/* .) cp libpng.a $(DESTDIR)$(LIBPATH) chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a clean: - $(RM_F) *.o libpng.a pngtest pngout.png + $(RM_F) *.o libpng.a pngtest pngout.png pnglibconf.h DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO writelock: @@ -81,20 +88,20 @@ writelock: # DO NOT DELETE THIS LINE -- make depend depends on it. -png.o: png.h pngconf.h pngpriv.h -pngerror.o: png.h pngconf.h pngpriv.h -pngrio.o: png.h pngconf.h pngpriv.h -pngwio.o: png.h pngconf.h pngpriv.h -pngmem.o: png.h pngconf.h pngpriv.h -pngset.o: png.h pngconf.h pngpriv.h -pngget.o: png.h pngconf.h pngpriv.h -pngread.o: png.h pngconf.h pngpriv.h -pngrtran.o: png.h pngconf.h pngpriv.h -pngrutil.o: png.h pngconf.h pngpriv.h -pngtrans.o: png.h pngconf.h pngpriv.h -pngwrite.o: png.h pngconf.h pngpriv.h -pngwtran.o: png.h pngconf.h pngpriv.h -pngwutil.o: png.h pngconf.h pngpriv.h -pngpread.o: png.h pngconf.h pngpriv.h - -pngtest.o: png.h pngconf.h +png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h +pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h + +pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/src/png/scripts/makefile.tc3 b/src/png/scripts/makefile.tc3 index bf6ade6d5b..462c47fece 100644 --- a/src/png/scripts/makefile.tc3 +++ b/src/png/scripts/makefile.tc3 @@ -25,57 +25,61 @@ OBJSL3 = +pngwrite$(O) +pngrtran$(O) +pngwtran$(O) +pngrio$(O) +pngwio$(O) all: libpng$(MODEL).lib pngtest$(E) +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts/pnglibconf.h.prebuilt + cp scripts/pnglibconf.h.prebuilt $@ + pngtest: pngtest$(E) test: pngtest$(E) pngtest$(E) -png$(O): png.h pngconf.h pngpriv.h +png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngset$(O): png.h pngconf.h pngpriv.h +pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngget$(O): png.h pngconf.h pngpriv.h +pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngread$(O): png.h pngconf.h pngpriv.h +pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngpread$(O): png.h pngconf.h pngpriv.h +pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngrtran$(O): png.h pngconf.h pngpriv.h +pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngrutil$(O): png.h pngconf.h pngpriv.h +pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngerror$(O): png.h pngconf.h pngpriv.h +pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngmem$(O): png.h pngconf.h pngpriv.h +pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngrio$(O): png.h pngconf.h pngpriv.h +pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngwio$(O): png.h pngconf.h pngpriv.h +pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngtest$(O): png.h pngconf.h +pngtest$(O): png.h pngconf.h pnglibconf.h $(CC) -c $(CFLAGS) $*.c -pngtrans$(O): png.h pngconf.h pngpriv.h +pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngwrite$(O): png.h pngconf.h pngpriv.h +pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngwtran$(O): png.h pngconf.h pngpriv.h +pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c -pngwutil$(O): png.h pngconf.h pngpriv.h +pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c libpng$(MODEL).lib: $(OBJS1) $(OBJS2) $(OBJS3) diff --git a/src/png/scripts/makefile.vcwin32 b/src/png/scripts/makefile.vcwin32 index a65f1c1127..6bfeac03f7 100644 --- a/src/png/scripts/makefile.vcwin32 +++ b/src/png/scripts/makefile.vcwin32 @@ -1,6 +1,6 @@ # makefile for libpng # Copyright (C) 1998 Tim Wegner -# Copyright (C) 2006,2009 Glenn Randers-Pehrson +# Copyright (C) 2006,2009,2011 Glenn Randers-Pehrson # # This code is released under the libpng license. # For conditions of distribution and use, see the disclaimer @@ -15,7 +15,7 @@ CC = cl LD = link AR = lib -CFLAGS = -nologo -MD -O2 -W3 -I..\zlib +CFLAGS = -nologo -D_CRT_SECURE_NO_DEPRECATE -MD -O2 -W3 -I..\zlib LDFLAGS = -nologo ARFLAGS = -nologo RM = del @@ -35,56 +35,60 @@ OBJS = $(OBJS1) $(OBJS2) $(OBJS3) # Targets all: libpng.lib -png$(O): png.h pngconf.h pngpriv.h +# see scripts/pnglibconf.mak for more options +pnglibconf.h: scripts\pnglibconf.h.prebuilt + copy scripts\pnglibconf.h.prebuilt $@ + +png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngset$(O): png.h pngconf.h pngpriv.h +pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngget$(O): png.h pngconf.h pngpriv.h +pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngread$(O): png.h pngconf.h pngpriv.h +pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngpread$(O): png.h pngconf.h pngpriv.h +pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngrtran$(O): png.h pngconf.h pngpriv.h +pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngrutil$(O): png.h pngconf.h pngpriv.h +pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngerror$(O): png.h pngconf.h pngpriv.h +pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngmem$(O): png.h pngconf.h pngpriv.h +pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngrio$(O): png.h pngconf.h pngpriv.h +pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngwio$(O): png.h pngconf.h pngpriv.h +pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngtrans$(O): png.h pngconf.h pngpriv.h +pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngwrite$(O): png.h pngconf.h pngpriv.h +pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngwtran$(O): png.h pngconf.h pngpriv.h +pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) -pngwutil$(O): png.h pngconf.h pngpriv.h +pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) libpng.lib: $(OBJS) -$(RM) $@ $(AR) $(ARFLAGS) -out:$@ $(OBJS) $(ERRFILE) -pngtest$(O): png.h pngconf.h +pngtest$(O): png.h pngconf.h pnglibconf.h $(CC) -c $(CFLAGS) $*.c $(ERRFILE) pngtest.exe: pngtest$(O) libpng.lib @@ -96,6 +100,7 @@ test: pngtest.exe clean: -$(RM) *$(O) -$(RM) libpng.lib + -$(RM) pnglibconf.h -$(RM) pngtest.exe -$(RM) pngout.png diff --git a/src/png/scripts/makefile.watcom b/src/png/scripts/makefile.watcom deleted file mode 100644 index db4d534f41..0000000000 --- a/src/png/scripts/makefile.watcom +++ /dev/null @@ -1,112 +0,0 @@ -# Makefile for libpng -# Watcom C/C++ 10.0 and later, 32-bit protected mode, flat memory model - -# Copyright (C) 2000, Pawel Mrochen, based on makefile.msc which is -# copyright 1995 Guy Eric Schalnat, Group 42, Inc. -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# To use, do "wmake /f scripts\makefile.watcom" - - -# ---------------------- Watcom C/C++ 10.0 and later ----------------------- - -# Where the zlib library and include files are located -ZLIBLIB=..\zlib -ZLIBINC=..\zlib - -# Target OS -OS=DOS -#OS=NT - -# Target CPU -CPU=6 # Pentium Pro -#CPU=5 # Pentium - -# Calling convention -CALLING=r # registers -#CALLING=s # stack - -# Uncomment next to put error messages in a file -#ERRFILE=>>pngerrs - -# -------------------------------------------------------------------------- - - -CC=wcc386 -CFLAGS=-$(CPU)$(CALLING) -fp$(CPU) -fpi87 -oneatx -mf -bt=$(OS) -i=$(ZLIBINC) -zq -LD=wcl386 -LDFLAGS=-zq - -O=.obj - -OBJS1=png$(O) pngset$(O) pngget$(O) pngrutil$(O) pngtrans$(O) pngwutil$(O) -OBJS2=pngmem$(O) pngpread$(O) pngread$(O) pngerror$(O) pngwrite$(O) -OBJS3=pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O) - - -all: test - -png$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngset$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngget$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngread$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngpread$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngrtran$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngrutil$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngerror$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngmem$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngrio$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngwio$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngtest$(O): png.h pngconf.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngtrans$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngwrite$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngwtran$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -pngwutil$(O): png.h pngconf.h pngpriv.h - $(CC) $(CFLAGS) $*.c $(ERRFILE) - -libpng.lib: $(OBJS1) $(OBJS2) $(OBJS3) - wlib -b -c -n -q libpng.lib $(OBJS1) - wlib -b -c -q libpng.lib $(OBJS2) - wlib -b -c -q libpng.lib $(OBJS3) - -pngtest.exe: pngtest.obj libpng.lib - $(LD) $(LDFLAGS) pngtest.obj libpng.lib $(ZLIBLIB)\zlib.lib - -test: pngtest.exe .symbolic - pngtest.exe - - -# End of makefile for libpng diff --git a/src/png/scripts/makevms.com b/src/png/scripts/makevms.com index 2fa9d0d639..f6c326103c 100644 --- a/src/png/scripts/makevms.com +++ b/src/png/scripts/makevms.com @@ -54,40 +54,40 @@ $ if make.eqs."" $ then $ dele pngtest.obj;* $ CALL MAKE png.OBJ "cc ''CCOPT' png" - - png.c png.h pngconf.h pngpriv.h + png.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngset.OBJ "cc ''CCOPT' pngset" - - pngset.c png.h pngconf.h pngpriv.h + pngset.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngget.OBJ "cc ''CCOPT' pngget" - - pngget.c png.h pngconf.h pngpriv.h + pngget.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngread.OBJ "cc ''CCOPT' pngread" - - pngread.c png.h pngconf.h pngpriv.h + pngread.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngpread.OBJ "cc ''CCOPT' pngpread" - - pngpread.c png.h pngconf.h pngpriv.h + pngpread.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngrtran.OBJ "cc ''CCOPT' pngrtran" - - pngrtran.c png.h pngconf.h pngpriv.h + pngrtran.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngrutil.OBJ "cc ''CCOPT' pngrutil" - - pngrutil.c png.h pngconf.h pngpriv.h + pngrutil.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngerror.OBJ "cc ''CCOPT' pngerror" - - pngerror.c png.h pngconf.h pngpriv.h + pngerror.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngmem.OBJ "cc ''CCOPT' pngmem" - - pngmem.c png.h pngconf.h pngpriv.h + pngmem.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngrio.OBJ "cc ''CCOPT' pngrio" - - pngrio.c png.h pngconf.h pngpriv.h + pngrio.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngwio.OBJ "cc ''CCOPT' pngwio" - - pngwio.c png.h pngconf.h pngpriv.h + pngwio.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngtrans.OBJ "cc ''CCOPT' pngtrans" - - pngtrans.c png.h pngconf.h pngpriv.h + pngtrans.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngwrite.OBJ "cc ''CCOPT' pngwrite" - - pngwrite.c png.h pngconf.h pngpriv.h + pngwrite.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngwtran.OBJ "cc ''CCOPT' pngwtran" - - pngwtran.c png.h pngconf.h pngpriv.h + pngwtran.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ CALL MAKE pngwutil.OBJ "cc ''CCOPT' pngwutil" - - pngwutil.c png.h pngconf.h pngpriv.h + pngwutil.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h $ write sys$output "Building Libpng ..." $ CALL MAKE libpng.OLB "lib/crea libpng.olb *.obj" *.OBJ $ write sys$output "Building pngtest..." $ CALL MAKE pngtest.OBJ "cc ''CCOPT' pngtest" - - pngtest.c png.h pngconf.h + pngtest.c png.h pngconf.h pnglibconf.h $ call make pngtest.exe - "LINK pngtest,libpng.olb/lib,''zlibsrc'libz.olb/lib" - pngtest.obj libpng.olb diff --git a/src/png/scripts/options.awk b/src/png/scripts/options.awk new file mode 100755 index 0000000000..24f07137f1 --- /dev/null +++ b/src/png/scripts/options.awk @@ -0,0 +1,734 @@ +#!/bin/awk -f +# scripts/options.awk - library build configuration control +# +# last changed in libpng version 1.5.0 - January 6, 2011 +# +# Copyright (c) 1998-2011 Glenn Randers-Pehrson +# +# This code is released under the libpng license. +# For conditions of distribution and use, see the disclaimer +# and license in png.h + +# The output of this script is written to the file given by +# the variable 'out'. The script is run twice, once with +# an intermediate output file, 'options.tmp' then again on +# that file to produce the final output: +# +# awk -f scripts/options.awk out=options.tmp scripts/options.dfa 1>&2 +# awk -f scripts/options.awk out=options.dfn options.tmp 1>&2 +# +# Some options may be specified on the command line: +# +# deb=1 Causes debugging to be output +# logunsupported=1 Causes all options to be recorded in the output +# everything=off Causes all options to be disabled by default +# everything=on Causes all options to be enabled by default +# +# If awk fails on your platform, try nawk instead. +# +# These options may also be specified in the original input file (and +# are copied to the preprocessed file). + +BEGIN{ + out="/dev/null" # intermediate, preprocessed, file + pre=-1 # preprocess (first line) + err=0 # in-line exit sets this + start="PNG_DEFN_MAGIC-" # Arbitrary start + end="-PNG_DEFN_END" # Arbitrary end + cx= "/@@@*" # Open C comment for output file + comment=start cx # Comment start + cend="*/" end # Comment end + def=start "#define PNG_@@@" # Arbitrary define + sup="@@@_SUPPORTED" end # end supported option + und=comment "#undef PNG_@@@" # Unsupported option + une="@@@_SUPPORTED" cend # end unsupported option + error=start "ERROR:" # error message + + # Variables + deb=0 # debug - set on command line + everything="" # do not override defaults + logunsupported=0 # write unsupported options too + + # Precreate arrays + option[""] = "" # list of all options: default enabled/disabled + done[""] = 1 # marks option as having been output + requires[""] = "" # requires by option + iffs[""] = "" # if by option + enabledby[""] = "" # options that enable it by option + setting[""] = "" # requires by setting + defaults[""] = "" # used for a defaulted value + doneset[""] = 1 # marks setting as having been output + r[""] = "" # Temporary array + + # For decorating the output file + protect = "" +} + +# The output file must be specified before any input: +out == "/dev/null" { + print "out=output.file must be given on the command line" + err = 1 + exit 1 +} + +# The very first line indicates whether we are reading pre-processed +# input or not, this must come *first* because 'PREPROCESSED' needs +# to be the very first line in the temporary file. +pre == -1{ + if ($0 == "PREPROCESSED") { + pre = 0 + next + } else { + pre = 1 + print "PREPROCESSED" >out + # And fall through to continue processing + } +} + +# variable=value +# Sets the given variable to the given value (the syntax is fairly +# free form, except for deb (you are expected to understand how to +# set the debug variable...) +# +# This happens before the check on 'pre' below skips most of the +# rest of the actions, so the variable settings happen during +# preprocessing but are recorded in the END action too. This +# allows them to be set on the command line too. +$0 ~ /^[ ]*everything[ =]*off[ ]*$/{ + everything = "off" + next +} +$0 ~ /^[ ]*everything[ =]*on[ ]*$/{ + everything = "on" + next +} +$0 ~ /^[ ]*logunsupported[ =]*0[ ]*$/{ + logunsupported = 0 + next +} +$0 ~ /^[ ]*logunsupported[ =]*1[ ]*$/{ + logunsupported = 1 + next +} +$1 == "deb" && $2 == "=" && NF == 3{ + deb = $3 + next +} + +# Preprocessing - this just copies the input file with lines +# that need preprocessing (just chunk at present) expanded +# The bare "pre" instead of "pre != 0" crashes under Sunos awk +pre && $1 != "chunk"{ + print >out + next +} + +# The first characters of the line determine how it is processed, +# leading spaces are ignored. In general tokens that are not +# keywords are the names of options. An option 'name' is +# controlled by the definition of the corresponding macros: +# +# PNG_name_SUPPORTED The option is turned on +# PNG_NO_name +# PNG_NO_name_SUPPORTED If the first macro is not defined +# either of these will turn the option off +# +# If none of these macros are defined the option is turned on, unless +# the keyword 'off' is given in a line relating to the option. The +# keyword 'on' can also be given, but it will be ignored (since it is +# the default.) +# +# In the syntax below a 'name' is indicated by "NAME", other macro +# values are indicated by "MACRO", as with "NAME" the leading "PNG_" +# is omitted, but in this case the "NO_" prefix and the "_SUPPORTED" +# suffix are never used. +# +# Each line is introduced by a keyword - the first non-space characters +# on the line. A line starting with a '#' is a comment - it is totally +# ignored. Keywords are as follows, a NAME, is simply a macro name +# without the leading PNG_, PNG_NO_ or the trailing _SUPPORTED. + +$1 ~ /^#/ || $0 ~ /^[ ]*$/{ + next +} + +# com +# The whole line is placed in the output file as a comment with +# the preceding 'com' removed +$1 == "com"{ + if (NF > 1) { + # sub(/^[ ]*com[ ]*/, "") + $1 = "" + print comment, $0, cend >out + } else + print start end >out + next +} + +# file output input protect +# Informational: the official name of the input file (without +# make generated local directories), the official name of the +# output file and, if required, a name to use in a protection +# macro for the contents. +$1 == "file" && NF >= 2{ + print comment, $2, cend >out + print comment, "Machine generated file: DO NOT EDIT", cend >out + if (NF >= 3) + print comment, "Derived from:", $3, cend >out + protect = $4 + if (protect != "") { + print start "#ifndef", protect end >out + print start "#define", protect end >out + } + next +} + +# option NAME ( (requires|enables|if) NAME* | on | off | disabled )* +# Declares an option 'NAME' and describes its default setting (disabled) +# and its relationship to other options. The option is disabled +# unless *all* the options listed after 'requires' are set and at +# least one of the options listed after 'if' is set. If the +# option is set then it turns on all the options listed after 'enables'. +# +# Note that "enables" takes priority over the required/if/disabled/off +# setting of the target option. +# +# The definition file may list an option as 'disabled': off by default, +# otherwise the option is enabled: on by default. A later (and it must +# be later) entry may turn an option on or off explicitly. + +$1 == "option" && NF >= 2{ + onoff = option[$2] # records current (and the default is "", enabled) + key = "" + for (i=3; i<=NF; ++i) { + if ($(i) == "on" || $(i) == "off" || $(i) == "disabled") { + key = "" + if (onoff != $(i)) { + # on or off can zap disabled or enabled: + if (onoff == "" || (onoff == "disabled" || onoff == "enabled") && ($(i) == "on" || $(i) == "off")) { + # It's easy to mis-spell the option when turning it + # on or off, so warn about it here: + if (onoff == "" && ($(i) == "on" || $(i) == "off")) { + print $2 ": ERROR: turning unrecognized option", $(i) + # For the moment error out - it is safer + err = 1 # prevent END{} running + exit 1 + } + onoff = $(i) + } else { + # Print a message, otherwise the error + # below is incomprehensible + print $2 ": currently", onoff ": attempt to turn", $(i) + break + } + } + } else if ($(i) == "requires" || $(i) == "if" || $(i) == "enables") { + key = $(i) + } else if (key == "requires") { + requires[$2] = requires[$2] " " $(i) + } else if (key == "if") { + iffs[$2] = iffs[$2] " " $(i) + } else if (key == "enables") { + enabledby[$(i)] = enabledby[$(i)] " " $2 + } else + break # bad line format + } + + if (i > NF) { + # Set the option, defaulting to 'enabled' + if (onoff == "") onoff = "enabled" + option[$2] = onoff + next + } + # Else fall through to the error handler +} + +# chunk NAME [requires OPT] [on|off|disabled] +# Expands to the 'option' settings appropriate to the reading and +# writing of an ancilliary PNG chunk 'NAME': +# +# option READ_NAME requires READ_ANCILLARY_CHUNKS [READ_OPT] +# option READ_NAME enables NAME +# [option READ_NAME off] +# option WRITE_NAME requires WRITE_ANCILLARY_CHUNKS [WRITE_OPT] +# option WRITE_NAME enables NAME +# [option WRITE_NAME off] + +pre != 0 && $1 == "chunk" && NF >= 2{ + # 'chunk' is handled on the first pass by writing appropriate + # 'option' lines into the intermediate file. + onoff = "" + reqread = "" + reqwrite = "" + i = 3 # indicates format error + if (NF > 2) { + # read the keywords/additional OPTS + req = 0 + for (i=3; i<=NF; ++i) { + if ($(i) == "on" || $(i) == "off" || $(i) == "disabled") { + if (onoff != $(i)) { + if (onoff == "") + onoff = $(i) + else + break # on/off conflict + } + } else if ($(i) == "requires") + req = 1 + else if (req != 1) + break # bad line: handled below + else { + reqread = reqread " READ_" $(i) + reqwrite = reqwrite " WRITE_" $(i) + } + } + } + + if (i > NF) { + # Output new 'option' lines to the intermediate file (out) + print "option READ_" $2, "requires READ_ANCILLARY_CHUNKS" reqread, "enables", $2, onoff >out + print "option WRITE_" $2, "requires WRITE_ANCILLARY_CHUNKS" reqwrite, "enables", $2, onoff >out + next + } + # Else hit the error handler below - bad line format! +} + +# setting MACRO ( requires MACRO* )* [ default VALUE ] +# Behaves in a similar way to 'option' without looking for NO_ or +# _SUPPORTED; the macro is enabled if it is defined so long as all +# the 'requires' macros are also defined. The definitions may be +# empty, an error will be issued if the 'requires' macros are +# *not* defined. If given the 'default' value is used if the +# macro is not defined. The default value will be re-tokenised. +# (BTW: this is somewhat restrictive, it mainly exists for the +# support of non-standard configurations and numeric parameters, +# see the uses in scripts/options.dat + +$1 == "setting" && (NF == 2 || NF >= 3 && ($3 == "requires" || $3 == "default")){ + reqs = "" + deflt = "" + isdef = 0 + key = "" + for (i=3; i<=NF; ++i) + if ($(i) == "requires" || $(i) == "default") { + key = $(i) + if (key == "default") isdef = 1 + } else if (key == "requires") + reqs = reqs " " $(i) + else if (key == "default") + deflt = deflt " " $(i) + else + break # Format error, handled below + + setting[$2] = reqs + # NOTE: this overwrites a previous value silently + if (isdef && deflt == "") + deflt = " " # as a flag to force output + defaults[$2] = deflt + next +} + +# The order of the dependency lines (option, chunk, setting) is irrelevant +# - the 'enables', 'requires' and 'if' settings will be used to determine +# the correct order in the output and the final values in pnglibconf.h are +# not order dependent. 'requires' and 'if' entries take precedence over +# 'enables' from other options; if an option requires another option it +# won't be set regardless of any options that enable it unless the other +# option is also enabled. +# +# Similarly 'enables' trumps a NO_ definition in CFLAGS or pngusr.h +# +# For simplicity cycles in the definitions are regarded as errors, +# even if they are not ambiguous. +# A given NAME can be specified in as many 'option' lines as required, the +# definitions are additive. + +# For backwards compatibility equivalent macros may be listed thus: +# +# = [NO_]NAME MACRO +# Makes -DMACRO equivalent to -DPNG_NO_NAME or -DPNG_NAME_SUPPORTED +# as appropriate. +# +# The definition is injected into the C compiler input when encountered +# in the second pass (so all these definitions appear *after* the @ +# lines!) +# +# 'NAME' is as above, but 'MACRO' is the full text of the equivalent +# old, deprecated, macro. + +$1 == "=" && NF == 3{ + print "#ifdef PNG_" $3 >out + if ($2 ~ /^NO_/) + print "# define PNG_" $2 >out + else + print "# define PNG_" $2 "_SUPPORTED" >out + print "#endif" >out + next +} + +# Lines may be injected into the C compiler input by preceding them +# with an "@" character. The line is copied with just the leading +# @ removed. + +$1 ~ /^@/{ + # sub(/^[ ]*@/, "") + $1 = substr($1, 2) + print >out + next +} + +# Check for unreognized lines, because of the preprocessing chunk +# format errors will be detected on the first pass independent of +# any other format errors. +{ + print "options.awk: bad line (" NR "):", $0 + err = 1 # prevent END{} running + exit 1 +} + +# For checking purposes names that start with "ok_" or "fail_" are +# not output to pnglibconf.h and must be either enabled or disabled +# respectively for the build to succeed. This allows interdependencies +# between options of the form "at least one of" or "at most one of" +# to be checked. For example: +# +# option FLOATING_POINT enables ok_math +# option FIXED_POINT enables ok_math +# This ensures that at least one of FLOATING_POINT and FIXED_POINT +# must be set for the build to succeed. +# +# option fail_math requires FLOATING_POINT FIXED_POINT +# This means the build will fail if *both* FLOATING_POINT and +# FIXED_POINT are set (this is an example; in fact both are allowed.) +# +# If all these options were given the build would require exactly one +# of the names to be enabled. + +END{ + # END{} gets run on an exit (a traditional awk feature) + if (err) exit 1 + + if (pre) { + # Record the final value of the variables + print "deb =", deb >out + if (everything != "") { + print "everything =", everything >out + } + print "logunsupported =", logunsupported >out + exit 0 + } + + # Do the 'setting' values first, the algorithm the standard + # tree walk (O(1)) done in an O(2) while/for loop; interations + # settings x depth, outputing the deepest required macros + # first. + print "" >out + print "/* SETTINGS */" >out + print comment, "settings", cend >out + finished = 0 + while (!finished) { + finished = 1 + movement = 0 # done nothing + for (i in setting) if (!doneset[i]) { + nreqs = split(setting[i], r) + if (nreqs > 0) { + for (j=1; j<=nreqs; ++j) if (!doneset[r[j]]) { + break + } + if (j<=nreqs) { + finished = 0 + continue # try a different setting + } + } + + # All the requirements have been processed, output + # this setting. + if (deb) print "setting", i + print "" >out + print "/* setting: ", i >out + print " * requires:" setting[i] >out + print " * default: ", defaults[i], "*/" >out + if (defaults[i] == "") { # no default, only check if defined + print "#ifdef PNG_" i >out + } + for (j=1; j<=nreqs; ++j) { + print "# ifndef PNG_" r[j] >out + print error, i, "requires", r[j] end >out + print "# endif" >out + } + if (defaults[i] != "") { # default handling + print "#ifdef PNG_" i >out + } + print def i, "PNG_" i end >out + if (defaults[i] != "") { + print "#else /*default*/" >out + # And add the default definition for the benefit + # of later settings an options test: + print "# define PNG_" i defaults[i] >out + print def i defaults[i] end >out + } + print "#endif" >out + + doneset[i] = 1 + ++movement + } + + if (!finished && !movement) { + print "setting: loop or missing setting in 'requires', cannot process:" + for (i in setting) if (!doneset[i]) { + print " setting", i, "requires" setting[i] + } + exit 1 + } + } + print comment, "end of settings", cend >out + + # Now do the options - somewhat more complex. The dependency + # tree is thus: + # + # name > name + # name requires name + # name if name + # name enabledby name + # + # First build a list 'tree' by option of all the things on which + # it depends. + print "" >out + print "/* OPTIONS */" >out + print comment, "options", cend >out + for (opt in enabledby) tree[opt] = 1 # may not be explicit options + for (opt in option) if (opt != "") { + o = option[opt] + # option should always be one of the following values + if (o != "on" && o != "off" && o != "disabled" && o != "enabled") { + print "internal option error (" o ")" + exit 1 + } + tree[opt] = "" # so unlisted options marked + } + for (opt in tree) if (opt != "") { + if (tree[opt] == 1) { + tree[opt] = "" + if (option[opt] != "") { + print "internal error (1)" + exit 1 + } + # Macros only listed in 'enables' remain off unless + # one of the enabling macros is on. + option[opt] = "disabled" + } + + split("", list) # clear 'list' + # Now add every requires, iffs or enabledby entry to 'list' + # so that we can add a unique list of requirements to tree[i] + split(requires[opt] iffs[opt] enabledby[opt], r) + for (i in r) list[r[i]] = 1 + for (i in list) tree[opt] = tree[opt] " " i + } + + # print the tree for extreme debugging + if (deb > 2) for (i in tree) if (i != "") print i, "depends-on" tree[i] + + # Ok, now check all options marked explicitly 'on' or 'off': + # + # If an option[opt] is 'on' then turn on all requires[opt] + # If an option[opt] is 'off' then turn off all enabledby[opt] + # + # Error out if we have to turn 'on' an 'off' option or vice versa. + npending = 0 + for (opt in option) if (opt != "") { + if (option[opt] == "on" || option[opt] == "off") { + pending[++npending] = opt + } + } + + err = 0 # set on error + while (npending > 0) { + opt = pending[npending--] + if (option[opt] == "on") { + nreqs = split(requires[opt], r) + for (j=1; j<=nreqs; ++j) { + if (option[r[j]] == "off") { + print "option", opt, "turned on, but requirement", r[j], "is turned off" + err = 1 + } else if (option[r[j]] != "on") { + option[r[j]] = "on" + pending[++npending] = r[j] + } + } + } else { + if (option[opt] != "off") { + print "internal error (2)" + exit 1 + } + nreqs = split(enabledby[opt], r) + for (j=1; j<=nreqs; ++j) { + if (option[r[j]] == "on") { + print "option", opt, "turned off, but enabled by", r[j], "which is turned on" + err = 1 + } else if (option[r[j]] != "off") { + option[r[j]] = "off" + pending[++npending] = r[j] + } + } + } + } + if (err) exit 1 + + # option[i] is now the complete list of all the tokens we may + # need to output, go through it as above, depth first. + finished = 0 + while (!finished) { + finished = 1 + movement = 0 # done nothing + for (i in option) if (!done[i]) { + nreqs = split(tree[i], r) + if (nreqs > 0) { + for (j=1; j<=nreqs; ++j) if (!done[r[j]]) { + break + } + if (j<=nreqs) { + finished = 0 + continue # next option + } + } + + # All the requirements have been processed, output + # this option. An option is _SUPPORTED if: + # + # all 'requires' are _SUPPORTED AND + # at least one of the 'if' options are _SUPPORTED AND + # EITHER: + # The name is _SUPPORTED (on the command line) + # OR: + # an 'enabledby' is _SUPPORTED + # OR: + # NO_name is not defined AND + # the option is not disabled; an option is disabled if: + # option == off + # option == disabled && everything != on + # option == "" && everything == off + if (deb) print "option", i + print "" >out + print "/* option:", i, option[i] >out + print " * requires: " requires[i] >out + print " * if: " iffs[i] >out + print " * enabled-by:" enabledby[i], "*/" >out + print "#undef PNG_on" >out + print "#define PNG_on 1" >out + + # requires + nreqs = split(requires[i], r) + for (j=1; j<=nreqs; ++j) { + print "#ifndef PNG_" r[j] "_SUPPORTED" >out + print "# undef PNG_on /*!" r[j] "*/" >out + # this error appears in the final output if something + # was switched 'on' but the processing above to force + # the requires did not work + if (option[i] == "on") { + print error, i, "requires", r[j] end >out + } + print "#endif" >out + } + + # if + nreqs = split(iffs[i], r) + print "#undef PNG_no_if" >out + if (nreqs > 0) { + print "/* if" iffs[i], "*/" >out + print "#define PNG_no_if 1" >out + for (j=1; j<=nreqs; ++j) { + print "#ifdef PNG_" r[j] "_SUPPORTED" >out + print "# undef PNG_no_if /*" r[j] "*/" >out + print "#endif" >out + } + print "#ifdef PNG_no_if /*missing if*/" >out + print "# undef PNG_on" >out + # There is no checking above for this, because we + # don't know which 'if' to choose, so whine about + # it here: + if (option[i] == "on") { + print error, i, "needs one of:", iffs[i] end >out + } + print "#endif" >out + } + + print "#ifdef PNG_on /*requires, if*/" >out + # enables + print "# undef PNG_not_enabled" >out + print "# define PNG_not_enabled 1" >out + print " /* enabled by" enabledby[i], "*/" >out + nreqs = split(enabledby[i], r) + for (j=1; j<=nreqs; ++j) { + print "#ifdef PNG_" r[j] "_SUPPORTED" >out + print "# undef PNG_not_enabled /*" r[j] "*/" >out + # Oops, probably not intended (should be factored + # out by the checks above). + if (option[i] == "off") { + print error, i, "enabled by:", r[j] end >out + } + print "#endif" >out + } + + print "# ifndef PNG_" i "_SUPPORTED /*!command line*/" >out + print "# ifdef PNG_not_enabled /*!enabled*/" >out + if (option[i] == "off" || option[i] == "disabled" && everything != "on" || option[i] == "enabled" && everything == "off") { + print "# undef PNG_on /*default off*/" >out + } else { + print "# ifdef PNG_NO_" i >out + print "# undef PNG_on /*turned off*/" >out + print "# endif" >out + print "# ifdef PNG_NO_" i "_SUPPORTED" >out + print "# undef PNG_on /*turned off*/" >out + print "# endif" >out + } + print "# endif /*!enabled*/" >out + print "# ifdef PNG_on" >out + # The _SUPPORTED macro must be defined so that dependent + # options output later work. + print "# define PNG_" i "_SUPPORTED" >out + print "# endif" >out + print "# endif /*!command line*/" >out + # If PNG_on is still set the option should be defined in + # pnglibconf.h + print "# ifdef PNG_on" >out + if (i ~ /^fail_/) { + print error, i, "is on: enabled by:" iffs[i] enabledby[i] ", requires" requires[i] end >out + } else if (i !~ /^ok_/) { + print def i sup >out + } + print "# endif /* definition */" >out + print "#endif /*requires, if*/" >out + if (logunsupported || i ~ /^ok_/) { + print "#ifndef PNG_on" >out + if (logunsupported) { + print und i une >out + } + if (i ~ /^ok_/) { + print error, i, "not enabled: requires:" requires[i] ", enabled by:" iffs[i] enabledby[i] end >out + } + print "#endif" >out + } + + done[i] = 1 + ++movement + } + + if (!finished && !movement) { + print "option: loop or missing option in dependency tree, cannot process:" + for (i in option) if (!done[i]) { + print " option", i, "depends on" tree[i], "needs:" + nreqs = split(tree[i], r) + if (nreqs > 0) for (j=1; j<=nreqs; ++j) if (!done[r[j]]) { + print " " r[j] + } + } + exit 1 + } + } + print comment, "end of options", cend >out + + # Regular end - everything looks ok + if (protect != "") { + print start "#endif", cx, protect, "*/" end >out + } +} diff --git a/src/png/scripts/png32ce.def b/src/png/scripts/png32ce.def deleted file mode 100644 index da505908aa..0000000000 --- a/src/png/scripts/png32ce.def +++ /dev/null @@ -1,259 +0,0 @@ -;------------------------------------------ -; LIBPNG module definition file for Windows -;------------------------------------------ - -LIBRARY lpngce - - png_memcpy_check - png_memset_check - png_set_quantize - png_read_init_3 - png_write_init_3 - png_set_strip_error_numbers - png_get_uint_32 - png_get_uint_16 - png_get_int_32 - -EXPORTS -;Version 1.4.4 - png_build_grayscale_palette @1 -; png_check_sig @2 - png_chunk_error @3 - png_chunk_warning @4 -; png_convert_from_struct_tm @5 -; png_convert_from_time_t @6 - png_create_info_struct @7 - png_create_read_struct @8 - png_create_write_struct @9 - png_data_freer @10 - png_destroy_info_struct @11 - png_destroy_read_struct @12 - png_destroy_write_struct @13 - png_error @14 - png_free @15 - png_free_data @16 - png_get_IHDR @17 - png_get_PLTE @18 - png_get_bKGD @19 - png_get_bit_depth @20 - png_get_cHRM @21 - png_get_cHRM_fixed @22 - png_get_channels @23 - png_get_color_type @24 - png_get_compression_buffer_size @25 - png_get_compression_type @26 - png_get_copyright @27 - png_get_error_ptr @28 - png_get_filter_type @29 - png_get_gAMA @30 - png_get_gAMA_fixed @31 - png_get_hIST @32 - png_get_header_ver @33 - png_get_header_version @34 - png_get_iCCP @35 - png_get_image_height @36 - png_get_image_width @37 - png_get_interlace_type @38 - png_get_io_ptr @39 - png_get_libpng_ver @40 - png_get_oFFs @41 - png_get_pCAL @42 - png_get_pHYs @43 - png_get_pixel_aspect_ratio @44 - png_get_pixels_per_meter @45 - png_get_progressive_ptr @46 - png_get_rgb_to_gray_status @47 - png_get_rowbytes @48 - png_get_rows @49 - png_get_sBIT @50 - png_get_sCAL @51 - png_get_sPLT @52 - png_get_sRGB @53 - png_get_signature @54 - png_get_tIME @55 - png_get_tRNS @56 - png_get_text @57 - png_get_unknown_chunks @58 - png_get_user_chunk_ptr @59 - png_get_user_transform_ptr @60 - png_get_valid @61 - png_get_x_offset_microns @62 - png_get_x_offset_pixels @63 - png_get_x_pixels_per_meter @64 - png_get_y_offset_microns @65 - png_get_y_offset_pixels @66 - png_get_y_pixels_per_meter @67 - png_malloc @68 -; png_memcpy_check @69 -; png_memset_check @70 - png_permit_empty_plte @71 - png_process_data @72 - png_progressive_combine_row @73 - png_read_end @74 - png_read_image @75 - png_read_info @76 -; png_read_init is deprecated - png_read_init @77 - png_read_png @78 - png_read_row @79 - png_read_rows @80 - png_read_update_info @81 - png_reset_zstream @82 - png_set_IHDR @83 - png_set_PLTE @84 - png_set_bKGD @85 - png_set_background @86 - png_set_bgr @87 - png_set_cHRM @88 - png_set_cHRM_fixed @89 - png_set_compression_buffer_size @90 - png_set_compression_level @91 - png_set_compression_mem_level @92 - png_set_compression_method @93 - png_set_compression_strategy @94 - png_set_compression_window_bits @95 - png_set_crc_action @96 - png_set_quantize @97 - png_set_error_fn @98 - png_set_expand @99 - png_set_filler @100 - png_set_filter @101 - png_set_filter_heuristics @102 - png_set_flush @103 - png_set_gAMA @104 - png_set_gAMA_fixed @105 - png_set_gamma @106 - png_set_gray_1_2_4_to_8 @107 ; deprecated - png_set_gray_to_rgb @108 - png_set_hIST @109 - png_set_iCCP @110 - png_set_interlace_handling @111 - png_set_invert_alpha @112 - png_set_invert_mono @113 - png_set_keep_unknown_chunks @114 - png_set_oFFs @115 - png_set_pCAL @116 - png_set_pHYs @117 - png_set_packing @118 - png_set_packswap @119 - png_set_palette_to_rgb @120 - png_set_progressive_read_fn @121 - png_set_read_fn @122 - png_set_read_status_fn @123 - png_set_read_user_chunk_fn @124 - png_set_read_user_transform_fn @125 - png_set_rgb_to_gray @126 - png_set_rgb_to_gray_fixed @127 - png_set_rows @128 - png_set_sBIT @129 - png_set_sCAL @130 - png_set_sPLT @131 - png_set_sRGB @132 - png_set_sRGB_gAMA_and_cHRM @133 - png_set_shift @134 - png_set_sig_bytes @135 - png_set_strip_16 @136 - png_set_strip_alpha @137 - png_set_swap @138 - png_set_swap_alpha @139 - png_set_tIME @140 - png_set_tRNS @141 - png_set_tRNS_to_alpha @142 - png_set_text @143 - png_set_unknown_chunk_location @144 - png_set_unknown_chunks @145 - png_set_user_transform_info @146 - png_set_write_fn @147 - png_set_write_status_fn @148 - png_set_write_user_transform_fn @149 - png_sig_cmp @150 - png_start_read_image @151 - png_warning @152 - png_write_chunk @153 - png_write_chunk_data @154 - png_write_chunk_end @155 - png_write_chunk_start @156 - png_write_end @157 - png_write_flush @158 - png_write_image @159 - png_write_info @160 - png_write_info_before_PLTE @161 -; png_write_init is deprecated - png_write_init @162 - png_write_png @163 - png_write_row @164 - png_write_rows @165 -; png_read_init_2 and png_write_init_2 are deprecated. - png_read_init_2 @166 - png_write_init_2 @167 - png_access_version_number @168 -; png_sig_bytes @169 -; png_libpng_ver @170 - png_init_io @171 - png_convert_to_rfc1123 @172 - png_set_invalid @173 -; Added at version 1.0.12 -; For compatiblity with 1.0.7-1.0.11 - png_info_init @174 -; png_read_init_3 @175 -; png_write_init_3 @176 - png_info_init_3 @177 - png_destroy_struct @178 -; Added at version 1.2.0 -; For use with PNG_USER_MEM_SUPPORTED -; png_destroy_struct_2 @179 -; png_create_read_struct_2 @180 -; png_create_write_struct_2 @181 -; png_malloc_default @182 -; png_free_default @183 -; MNG features -; png_permit_mng_features @184 -; MMX support -; png_mmx_support @185 -; png_get_mmx_flagmask @186 -; png_get_asm_flagmask @187 -; png_get_asm_flags @188 -; png_get_mmx_bitdepth_threshold @189 -; png_get_mmx_rowbytes_threshold @190 -; png_set_asm_flags @191 -; png_init_mmx_flags @192 -; Strip error numbers -; png_set_strip_error_numbers @193 -; Added at version 1.2.2 - png_handle_as_unknown @179 - png_zalloc @180 - png_zfree @181 -; png_handle_as_unknown @194 -; png_zalloc @195 -; png_zfree @196 -; Added at version 1.2.6 - png_malloc_warn @195 - png_get_user_height_max @196 - png_get_user_width_max @197 - png_set_user_limits @198 -; Added at version 1.2.7 - png_set_add_alpha @199 -; Added at version 1.2.9 -; png_get_uint_32 @200 - png_save_uint_32 @201 -; png_get_uint_16 @202 - png_save_uint_16 @203 -; png_get_int_32 @204 - png_save_int_32 @205 - png_get_uint_31 @206 - png_set_expand_gray_1_2_4_to_8 @207 -; Added at version 1.2.41 - png_write_sig @208 - png_benign_error @209 - png_benign_chunk_error @210 - png_set_benign_error @211 - png_get_io_chunk_name @212 - png_get_io_state @213 - png_get_chunk_cache_max @215 - png_set_chunk_cache_max @216 - png_check_cHRM_fixed @217 - png_calloc @218 - png_set_longjmp_fn @219 -; Added at version 1.4.1 - png_get_chunk_malloc_max @220 - png_set_chunk_malloc_max @221 diff --git a/src/png/scripts/pnglibconf.dfa b/src/png/scripts/pnglibconf.dfa new file mode 100644 index 0000000000..07b7f6927a --- /dev/null +++ b/src/png/scripts/pnglibconf.dfa @@ -0,0 +1,578 @@ +# scripts/pnglibconf.dfa - library build configuration control +# +@/*- pnglibconf.dfn intermediate file +@ * generated from scripts/pnglibconf.dfa +@ */ +# +com pnglibconf.h - library build configuration +com +com libpng version 1.5.3 - July 7, 2011 +com +com Copyright (c) 1998-2011 Glenn Randers-Pehrson +com +com This code is released under the libpng license. +com For conditions of distribution and use, see the disclaimer +com and license in png.h +com + +file pnglibconf.h scripts/pnglibconf.dfa PNGLCONF_H + +# This file is preprocessed by scripts/options.awk and the +# C compiler to generate 'pnglibconf.h' - a list of all the +# configuration options. The file lists the various options +# that can *only* be specified during the libpng build; +# pnglibconf.h freezes the definitons selected for the specific +# build. +# +# The syntax is detailed in scripts/options.awk, this is a summary +# only: +# +# setting [requires ...] [default] +# #define PNG_ /* value comes from current setting */ +# option [requires ...] [if ...] [enables ...] [disabled] +# #define PNG__SUPPORTED if the requirements are met and +# enable the other options listed +# chunk [requires ...] [disabled] +# Enable chunk processing for the given ancillary chunk +# +# Note that the 'on' and 'off' keywords, while valid on both option +# and chunk, should not be used in this file because they force the +# relevant options on or off. + +#---------------------------------------------------------------------- + +# The following setting, option and chunk values can all be changed +# while building libpng: +# +# setting: change 'setting' lines to fine tune library performance, +# changes to the settings don't affect the libpng API functionally +# +# option: change 'option' lines to remove or add capabilities from +# or to the library; options change the library API +# +# chunk: change 'chunk' lines to remove capabilities to process +# optional ('ancillary') chunks. This does not prevent PNG +# decoding but does change the libpng API because some chunks +# will be ignored. +# +# There are three ways of disabling features, in no particular order: +# +# 1) Create 'pngusr.h', enter the required private build information +# detailed below and #define PNG_NO_