X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9c0d9ce3285864062f74951871971fec1debeafb..43f4e852a1b2ac37c3db6a2b87315192ac549191:/src/png/ANNOUNCE diff --git a/src/png/ANNOUNCE b/src/png/ANNOUNCE index d8ad39e51f..d89d11d315 100644 --- a/src/png/ANNOUNCE +++ b/src/png/ANNOUNCE @@ -1,4 +1,5 @@ -Libpng 1.5.6 - November 3, 2011 + +Libpng 1.5.7 - December 15, 2011 This is a public release of libpng, intended for use in production codes. @@ -7,76 +8,86 @@ Files available for download: Source files with LF line endings (for Unix/Linux) and with a "configure" script - libpng-1.5.6.tar.xz (LZMA-compressed, recommended) - libpng-1.5.6.tar.gz - libpng-1.5.6.tar.bz2 + 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 - lpng156.7z (LZMA-compressed, recommended) - lpng156.zip + lpng157.7z (LZMA-compressed, recommended) + lpng157.zip Other information: - libpng-1.5.6-README.txt - libpng-1.5.6-LICENSE.txt - -Changes since the last public release (1.5.5): + libpng-1.5.7-README.txt + libpng-1.5.7-LICENSE.txt - 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 +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