-Libpng 1.5.7 - December 15, 2011
+Libpng 1.6.2 - April 25, 2013
This is a public release of libpng, intended for use in production codes.
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
+ libpng-1.6.2.tar.xz (LZMA-compressed, recommended)
+ libpng-1.6.2.tar.gz
Source files with CRLF line endings (for Windows), without the
"configure" script
- lpng157.7z (LZMA-compressed, recommended)
- lpng157.zip
+ lpng162.7z (LZMA-compressed, recommended)
+ lpng162.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.
+ libpng-1.6.2-README.txt
+ libpng-1.6.2-LICENSE.txt
+
+Changes since the last public release (1.6.1):
+
+ Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling.
+ Fixed incorrect warning of excess deflate data. End condition - the
+ warning would be produced if the end of the deflate stream wasn't read
+ in the last row. The warning is harmless.
+ Corrected the test on user transform changes on read. It was in the
+ png_set of the transform function, but that doesn't matter unless the
+ transform function changes the rowbuf size, and that is only valid if
+ transform_info is called.
+ Corrected a misplaced closing bracket in contrib/libtests/pngvalid.c
+ (Flavio Medeiros).
+ Corrected length written to uncompressed iTXt chunks (Samuli Suominen).
+ Added contrib/tools/fixitxt.c, to repair the erroneous iTXt chunk length
+ written by libpng-1.6.0 and 1.6.1.
+ Disallow storing sRGB information when the sRGB is not supported.
+ Merge pngtest.c with libpng-1.7.0
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