X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/706b88074de0c288b81edac13094dd052b6cc078..ab7049776d45e622f621dd06216a4c1a1ad34b15:/src/png/ANNOUNCE diff --git a/src/png/ANNOUNCE b/src/png/ANNOUNCE index a168b728dd..d89d11d315 100644 --- a/src/png/ANNOUNCE +++ b/src/png/ANNOUNCE @@ -1,29 +1,98 @@ -Libpng 1.2.7 - September 12, 2004 - -This is not intended to be a public release. It will be replaced -within a few weeks by a public version or by another test version. - -Changes since the last public release (1.2.6): - - Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1. - 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. - Fixed bug with sCAL chunk and big-endian machines (David Munro). - Undid new code added in 1.2.6 to update the color_type in - png_set_filler(). - Added png_set_add_alpha() that updates color type. - Revised png_set_strip_filler() to not remove alpha if color_type has alpha. - Added makefile.hp64 - Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin - -Send comments/corrections/commendations to -png-implement@ccrc.wustl.edu (subscription required; write to -majordomo@ccrc.wustl.edu with "subscribe png-implement" in the message) -or to glennrp@users.sourceforge.net +Libpng 1.5.7 - December 15, 2011 + +This is a public release of libpng, intended for use in production codes. + +Files available for download: + +Source files with LF line endings (for Unix/Linux) and with a +"configure" script + + libpng-1.5.7.tar.xz (LZMA-compressed, recommended) + libpng-1.5.7.tar.gz + libpng-1.5.7.tar.bz2 + +Source files with CRLF line endings (for Windows), without the +"configure" script + + lpng157.7z (LZMA-compressed, recommended) + lpng157.zip + +Other information: + + libpng-1.5.7-README.txt + libpng-1.5.7-LICENSE.txt + +Changes since the last public release (1.5.6): + Added support for ARM processor (Mans Rullgard) + Fixed bug in pngvalid on early allocation failure; fixed type cast in + pngmem.c; pngvalid would attempt to call png_error() if the allocation + of a png_struct or png_info failed. This would probably have led to a + crash. The pngmem.c implementation of png_malloc() included a cast + to png_size_t which would fail on large allocations on 16-bit systems. + Fix for the preprocessor of the Intel C compiler. The preprocessor + splits adjacent @ signs with a space; this changes the concatentation + token from @-@-@ to PNG_JOIN; that should work with all compiler + preprocessors. + Paeth filter speed improvements from work by Siarhei Siamashka. This + changes the 'Paeth' reconstruction function to improve the GCC code + generation on x86. The changes are only part of the suggested ones; + just the changes that definitely improve speed and remain simple. + The changes also slightly increase the clarity of the code. + Check compression_type parameter in png_get_iCCP and remove spurious + casts. The compression_type parameter is always assigned to, so must + be non-NULL. The cast of the profile length potentially truncated the + value unnecessarily on a 16-bit int system, so the cast of the (byte) + compression type to (int) is specified by ANSI-C anyway. + Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left + the sBIT fields in the test pixel as 0, which resulted in a floating + point division by zero which was irrelevant but causes systems where + FP exceptions cause a crash. Added code to pngvalid to turn on FP + exceptions if the appropriate glibc support is there to ensure this is + tested in the future. + Added versioning to pnglibconf.h comments. + Installed more accurate linear to sRGB conversion tables. The slightly + modified tables reduce the number of 16-bit values that + convert to an off-by-one 8-bit value. The "makesRGB.c" code that was used + to generate the tables is now in a contrib/sRGBtables sub-directory. + Added run-time detection of NEON support. + Multiple transform bug fixes plus a work-round for double gamma correction. + libpng does not support more than one transform that requires linear data + at once - if this is tried typically the results is double gamma + correction. Since the simplified APIs can need rgb to gray combined with + a compose operation it is necessary to do one of these outside the main + libpng transform code. This check-in also contains fixes to various bugs + in compose and rgb to gray (on palette). + Fixes for C++ compilation using g++ When libpng source is compiled + using g++. The compiler imposes C++ rules on the C source; thus it + is desireable to make the source work with either C or C++ rules + without throwing away useful error information. This change adds + png_voidcast to allow C semantic (void*) cases or the corresponding + C++ static_cast operation, as appropriate. + Added --noexecstack to assembler file compilation. GCC does not set + this on assembler compilation, even though it does on C compilation. + This creates security issues if assembler code is enabled; the + work-around is to set it by default in the flags for $(CCAS) + Removed "zTXt" from warning in generic chunk decompression function. + Validate time settings passed to pngset() and png_convert_to_rfc1123() + (Frank Busse). + Added MINGW support to CMakeLists.txt + Reject invalid compression flag or method when reading the iTXt chunk. + Moved pngvalid.c into contrib/libtests + Rebuilt Makefile.in, configure, etc., with autoconf-2.68 + Replaced an "#if" with "#ifdef" in pngrtran.c + Revised #if PNG_DO_BC block in png.c (use #ifdef and add #else) + Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400, + as in libpng-1.5.4. + Put CRLF line endings in the owatcom project files. + Updated CMakeLists.txt to account for the relocation of pngvalid.c + Minor fixes to pngvalid.c for gcc 4.6.2 compatibility to remove warnings + reported by earlier versions. + +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