libpng-1.6.31

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New point version.

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Version 1.6.30beta01 [April 1, 2017]

Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in

makefile.linux and makefile.solaris-x86 (Cosmin).

Revised documentation of png_get_error_ptr() in the libpng manual. Silence clang -Wcomma and const drop warnings (Viktor Szakats). Update Sourceforge URLs in documentation (https instead of http).

Version 1.6.30beta02 [April 22, 2017]

Document need to check for integer overflow when allocating a pixel

buffer for multiple rows in contrib/gregbook, contrib/pngminus, example.c, and in the manual (suggested by Jaeseung Choi). This is similar to the bug reported against pngquant in CVE-2016-5735.

Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation.

Version 1.6.30beta03 [May 22, 2017]

Check for integer overflow in contrib/visupng and contrib/tools/genpng. Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt. Test CMAKE_HOST_WIN32 instead of WIN32 in CMakeLists.txt. Fix some URL in documentation.

Version 1.6.30beta04 [June 7, 2017]

Avoid writing an empty IDAT when the last IDAT exactly fills the

compression buffer (bug report by Brian Baird). This bug was introduced in libpng-1.6.0.

Version 1.6.30rc02 [June 25, 2017]

Update copyright year in pnglibconf.h, make ltmain.sh executable. Add a reference to the libpng.download site in README.

Version 1.6.31beta01 [July 5, 2017]

Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it;

bug report by Michael Felt).

Revised pngpriv.h to work around failure to compile arm/filter_neon.S

("typedef" directive is unrecognized by the assembler). The problem was introduced in libpng-1.6.30beta01.

Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx). Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish).

Version 1.6.31beta02 [July 8, 2017]

Added instructions for disabling hardware optimizations in INSTALL. Added "--enable-hardware-optimizations" configuration flag to enable

or disable all hardware optimizations with one flag.

Version 1.6.31beta03 [July 9, 2017]

Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms. Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent

possible integer overflow (Bug report by John Bowler).

Quieted "declaration after statement" warnings in intel/filter_sse2.c. Added scripts/makefile-linux-opt, which has hardware optimizations enabled.

Version 1.6.31beta04 [July 11, 2017]

Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when

integers appear on both sides of a compare. Worked around the others by forcing the strict-overflow setting in the relevant functions to a level where they are not reported (John Bowler).

Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like

the space.

Worked around some C-style casts from (void*) because g++ 5.4.0 objects

to them.

Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint

overflow' check that is on by default with -Wall -Wextra.

Version 1.6.31beta05 [July 13, 2017]

Added eXIf chunk support.

Version 1.6.31beta06 [July 17, 2017]

Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm

tags) to pngtest.png.

Version 1.6.31beta07 [July 18, 2017]

Revised the eXIf chunk in pngtest.png to fix "Bad IFD1 Directory" warning.

Version 1.6.31rc02 [July 25, 2017]

Fixed typo in example.c (png_free_image should be png_image_free) (Bug

report by John Smith)

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Fixed at revision 18987.