113 lines
5.2 KiB
Plaintext
113 lines
5.2 KiB
Plaintext
Libpng 1.6.19beta04 - October 10, 2015
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This is not intended to be a public release. It will be replaced
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within a few weeks by a public version or by another test version.
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Files available for download:
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Source files with LF line endings (for Unix/Linux) and with a
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"configure" script
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1.6.19beta04.tar.xz (LZMA-compressed, recommended)
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1.6.19beta04.tar.gz
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Source files with CRLF line endings (for Windows), without the
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"configure" script
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lp1619b04.7z (LZMA-compressed, recommended)
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lp1619b04.zip
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Other information:
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1.6.19beta04-README.txt
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1.6.19beta04-LICENSE.txt
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libpng-1.6.19beta04-*.asc (armored detached GPG signatures)
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Changes since the last public release (1.6.18):
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Version 1.6.19beta01 [July 30, 2015]
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Updated obsolete information about the simplified API macros in the
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manual pages (Bug report by Arc Riley).
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Avoid potentially dereferencing NULL info_ptr in png_info_init_3().
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Rearranged png.h to put the major sections in the same order as
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in libpng17.
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Eliminated unused PNG_COST_SHIFT, PNG_WEIGHT_SHIFT, PNG_COST_FACTOR, and
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PNG_WEIGHT_FACTOR macros.
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Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler
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(Bug report by Viktor Szakats). Several warnings remain and are
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unavoidable, where we test for overflow.
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Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c
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Fixed uninitialized variable in contrib/gregbook/rpng2-x.c
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Version 1.6.19beta02 [August 19, 2015]
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Moved config.h.in~ from the "libpng_autotools_files" list to the
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"libpng_autotools_extra" list in autogen.sh because it was causing a
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false positive for missing files (bug report by Robert C. Seacord).
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Removed unreachable "break" statements in png.c, pngread.c, and pngrtran.c
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to suppress clang warnings (Bug report by Viktor Szakats).
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Fixed some bad links in the man page.
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Changed "n bit" to "n-bit" in comments.
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Added signed/unsigned 16-bit safety net. This removes the dubious
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0x8000 flag definitions on 16-bit systems. They aren't supported
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yet the defs *probably* work, however it seems much safer to do this
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and be advised if anyone, contrary to advice, is building libpng 1.6
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on a 16-bit system. It also adds back various switch default clauses
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for GCC; GCC errors out if they are not present (with an appropriately
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high level of warnings).
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Safely convert num_bytes to a png_byte in png_set_sig_bytes() (Robert
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Seacord).
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Fixed the recently reported 1's complement security issue by replacing
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the value that is illegal in the PNG spec, in both signed and unsigned
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values, with 0. Illegal unsigned values (anything greater than or equal
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to 0x80000000) can still pass through, but since these are not illegal
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in ANSI-C (unlike 0x80000000 in the signed case) the checking that
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occurs later can catch them (John Bowler).
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Version 1.6.19beta03 [September 26, 2015]
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Fixed png_save_int_32 when int is not 2's complement (John Bowler).
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Updated libpng16 with all the recent test changes from libpng17,
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including changes to pngvalid.c to ensure that the original,
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distributed, version of contrib/visupng/cexcept.h can be used
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(John Bowler).
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pngvalid contains the correction to the use of SAVE/STORE_
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UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7. More
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tests contain the --strict option to detect warnings and the
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pngvalid-standard test has been corrected so that it does not
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turn on progressive-read. There is a separate test which does
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that. (John Bowler)
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Also made some signed/unsigned fixes.
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Make pngstest error limits version specific. Splitting the machine
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generated error structs out to a file allows the values to be updated
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without changing pngstest.c itself. Since libpng 1.6 and 1.7 have
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slightly different error limits this simplifies maintenance. The
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makepngs.sh script has also been updated to more accurately reflect
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current problems in libpng 1.7 (John Bowler).
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Incorporated new test PNG files into make check. tests/pngstest-*
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are changed so that the new test files are divided into 8 groups by
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gamma and alpha channel. These tests have considerably better code
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and pixel-value coverage than contrib/pngsuite; however,coverage is
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still incomplete (John Bowler).
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Removed the '--strict' in 1.6 because of the double-gamma-correction
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warning, updated pngstest-errors.h for the errors detected with the
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new contrib/testspngs PNG test files (John Bowler).
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Version 1.6.19beta04 [October 10, 2015]
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Worked around rgb-to-gray issues in libpng 1.6. The previous
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attempts to ignore the errors in the code aren't quite enough to
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deal with the 'channel selection' encoding added to libpng 1.7; abort.
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Fixed 'pow' macros in pngvalid.c. It is legal for 'pow' to be a
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macro, therefore the argument list cannot contain preprocessing
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directives. Make sure pow is a function where this happens. This is
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a minimal safe fix, the issue only arises in non-performance-critical
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code (bug report by Curtis Leach, fix by John Bowler).
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Added sPLT support to pngtest.c
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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https://lists.sourceforge.net/lists/listinfo/png-mng-implement
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to subscribe)
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or to glennrp at users.sourceforge.net
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Glenn R-P
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