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[master] Imported from libpng-1.6.18.tar
This commit is contained in:
Glenn Randers-Pehrson
114
ANNOUNCE
114
ANNOUNCE
@@ -1,4 +1,4 @@
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Libpng 1.6.17 - March 26, 2015
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Libpng 1.6.18 - July 23, 2015
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This is a public release of libpng, intended for use in production codes.
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@@ -7,61 +7,79 @@ 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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libpng-1.6.17.tar.xz (LZMA-compressed, recommended)
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libpng-1.6.17.tar.gz
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libpng-1.6.18.tar.xz (LZMA-compressed, recommended)
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libpng-1.6.18.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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lpng1617.7z (LZMA-compressed, recommended)
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lpng1617.zip
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lpng1618.7z (LZMA-compressed, recommended)
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lpng1618.zip
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Other information:
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libpng-1.6.17-README.txt
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libpng-1.6.17-LICENSE.txt
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libpng-1.6.17-*.asc (armored detached GPG signatures)
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libpng-1.6.18-README.txt
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libpng-1.6.18-LICENSE.txt
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libpng-1.6.18-*.asc (armored detached GPG signatures)
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Changes since the last public release (1.6.16):
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Removed duplicate PNG_SAFE_LIMITS_SUPPORTED handling from pngconf.h
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Corrected the width limit calculation in png_check_IHDR().
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Removed user limits from pngfix. Also pass NULL pointers to
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png_read_row to skip the unnecessary row de-interlace stuff.
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Added testing of png_set_packing() to pngvalid.c
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Regenerated configure scripts in the *.tar distributions with libtool-2.4.4
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Implement previously untested cases of libpng transforms in pngvalid.c
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Fixed byte order in 2-byte filler, in png_do_read_filler().
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Made the check for out-of-range values in png_set_tRNS() detect
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values that are exactly 2^bit_depth, and work on 16-bit platforms.
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Merged some parts of libpng-1.6.17beta01 and libpng-1.7.0beta47.
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Added #ifndef __COVERITY__ where needed in png.c, pngrutil.c and
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pngset.c to avoid warnings about dead code.
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Do not build png_product2() when it is unused.
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Display user limits in the output from pngtest.
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Eliminated the PNG_SAFE_LIMITS macro and restored the 1-million-column
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and 1-million-row default limits in pnglibconf.dfa, that can be reset
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by the user at build time or run time. This provides a more robust
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defense against DOS and as-yet undiscovered overflows.
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Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default.
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Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins).
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Rebuilt configure scripts with automake-1.15 and libtool-2.4.6
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Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block
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of png.h.
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Avoid runtime checks when converting integer to png_byte with
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Visual Studio (Sergey Kosarevsky)
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Removed some comments that the configure script did not handle
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properly from scripts/pnglibconf.dfa and pnglibconf.h.prebuilt.
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Free the unknown_chunks structure even when it contains no data.
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Updated CMakeLists.txt to add OSX framework, change YES/NO to ON/OFF
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for consistency, and remove some useless tests (Alexey Petruchik).
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Remove pnglibconf.h, pnglibconf.c, pnglibconf.pre, pnglibconf.dfn,
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and pnglibconf.out instead of pnglibconf.* in "make clean" (Cosmin).
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Fixed simplified 8-bit-linear to sRGB alpha. The calculated alpha
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value was wrong. It's not clear if this affected the final stored
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value; in the obvious code path the upper and lower 8-bits of the
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alpha value were identical and the alpha was truncated to 8-bits
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rather than dividing by 257 (John Bowler).
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Changes since the last public release (1.6.17):
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Removed PNG_SET_CHUNK_[CACHE|MALLOC]_LIMIT_SUPPORTED macros. They
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have been combined with PNG_SET_USER_LIMITS_SUPPORTED (resolves
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bug report by Andrew Church).
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Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c. This
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fixes some arithmetic errors that caused some tests to fail on
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some 32-bit platforms (Bug reports by Peter Breitenlohner [i686]
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and Petr Gajdos [i586]).
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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 Szaka'ts).
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Replaced "unexpected" with an integer (0xabadca11) in pngset.c
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where a long was expected, to avoid a compiler warning when PNG_DEBUG > 1.
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Added contrib/examples/simpleover.c, to demonstrate how to handle
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alpha compositing of multiple images, using the "simplified API"
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and an example PNG generation tool, contrib/examples/genpng.c
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(John Bowler).
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PNG_RELEASE_BUILD replaces tests where the code depended on the build base
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type and can be defined on the command line, allowing testing in beta
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builds (John Bowler).
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Avoid Coverity issue 80858 (REVERSE NULL) in pngtest.c
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Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug
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report from Christopher Ferris).
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Backport filter selection code from libpng-1.7.0beta51, to combine
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sub_row, up_row, avg_row, and paeth_row into try_row and tst_row.
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Changed png_voidcast(), etc., to voidcast(), etc., in contrib/tools/pngfix.c
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to avoid confusion with the libpng private macros.
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Fixed old cut&paste bug in the weighted filter selection code in
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pngwutil.c, introduced in libpng-0.95, March 1997.
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Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the
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compiled library size. It never worked properly and as far as we can
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tell, no one uses it. The png_set_filter_heuristics() and
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png_set_filter_heuristics_fixed() APIs are retained but deprecated
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and do nothing.
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Quieted some Coverity issues in pngfix.c, png-fix-itxt.c, pngvalid.c,
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pngstest.c, and pngimage.c. Most seem harmless, but png-fix-itxt
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would only work with iTXt chunks with length 255 or less.
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Removed non-working progressive reader 'skip' function. This
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function has apparently never been used. It was implemented
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to support back-door modification of png_struct in libpng-1.4.x
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but (because it does nothing and cannot do anything) was apparently
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never tested (John Bowler).
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Fixed cexcept.h in which GCC 5 now reports that one of the auto
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variables in the Try macro needs to be volatile to prevent value
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being lost over the setjmp (John Bowler).
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Added #ifdef's to contrib/examples programs so people don't try
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to compile them without the minimum required support enabled
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(suggested by Flavio Medeiros).
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Eliminated the final two Coverity defects (insecure temporary file
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handling in contrib/libtests/pngstest.c; possible overflow of
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unsigned char in contrib/tools/png-fix-itxt.c). To use the "secure"
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file handling, define PNG_USE_MKSTEMP, otherwise "tmpfile()" will
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be used.
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Removed some unused WEIGHTED_FILTER macros from pngstruct.h
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Replaced arbitrary use of 'extern' with #define PNG_LINKAGE_*. To
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preserve API compatibility, the new defines all default to "extern"
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(requested by Jan Nijtmans).
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Belatedly added Mans Rullgard and James Yu to the list of Contributing
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Authors.
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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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