| Libpng 1.6.18 - July 23, 2015 |
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| This is a public release of libpng, intended for use in production codes. |
| |
| Files available for download: |
| |
| Source files with LF line endings (for Unix/Linux) and with a |
| "configure" script |
| |
| libpng-1.6.18.tar.xz (LZMA-compressed, recommended) |
| libpng-1.6.18.tar.gz |
| |
| Source files with CRLF line endings (for Windows), without the |
| "configure" script |
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| lpng1618.7z (LZMA-compressed, recommended) |
| lpng1618.zip |
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| Other information: |
| |
| libpng-1.6.18-README.txt |
| libpng-1.6.18-LICENSE.txt |
| libpng-1.6.18-*.asc (armored detached GPG signatures) |
| |
| Changes since the last public release (1.6.17): |
| Removed PNG_SET_CHUNK_[CACHE|MALLOC]_LIMIT_SUPPORTED macros. They |
| have been combined with PNG_SET_USER_LIMITS_SUPPORTED (resolves |
| bug report by Andrew Church). |
| Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c. This |
| fixes some arithmetic errors that caused some tests to fail on |
| some 32-bit platforms (Bug reports by Peter Breitenlohner [i686] |
| and Petr Gajdos [i586]). |
| Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler |
| (Bug report by Viktor Szaka'ts). |
| Replaced "unexpected" with an integer (0xabadca11) in pngset.c |
| where a long was expected, to avoid a compiler warning when PNG_DEBUG > 1. |
| Added contrib/examples/simpleover.c, to demonstrate how to handle |
| alpha compositing of multiple images, using the "simplified API" |
| and an example PNG generation tool, contrib/examples/genpng.c |
| (John Bowler). |
| PNG_RELEASE_BUILD replaces tests where the code depended on the build base |
| type and can be defined on the command line, allowing testing in beta |
| builds (John Bowler). |
| Avoid Coverity issue 80858 (REVERSE NULL) in pngtest.c |
| Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug |
| report from Christopher Ferris). |
| Backport filter selection code from libpng-1.7.0beta51, to combine |
| sub_row, up_row, avg_row, and paeth_row into try_row and tst_row. |
| Changed png_voidcast(), etc., to voidcast(), etc., in contrib/tools/pngfix.c |
| to avoid confusion with the libpng private macros. |
| Fixed old cut&paste bug in the weighted filter selection code in |
| pngwutil.c, introduced in libpng-0.95, March 1997. |
| Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the |
| compiled library size. It never worked properly and as far as we can |
| tell, no one uses it. The png_set_filter_heuristics() and |
| png_set_filter_heuristics_fixed() APIs are retained but deprecated |
| and do nothing. |
| Quieted some Coverity issues in pngfix.c, png-fix-itxt.c, pngvalid.c, |
| pngstest.c, and pngimage.c. Most seem harmless, but png-fix-itxt |
| would only work with iTXt chunks with length 255 or less. |
| Removed non-working progressive reader 'skip' function. This |
| function has apparently never been used. It was implemented |
| to support back-door modification of png_struct in libpng-1.4.x |
| but (because it does nothing and cannot do anything) was apparently |
| never tested (John Bowler). |
| Fixed cexcept.h in which GCC 5 now reports that one of the auto |
| variables in the Try macro needs to be volatile to prevent value |
| being lost over the setjmp (John Bowler). |
| Added #ifdef's to contrib/examples programs so people don't try |
| to compile them without the minimum required support enabled |
| (suggested by Flavio Medeiros). |
| Eliminated the final two Coverity defects (insecure temporary file |
| handling in contrib/libtests/pngstest.c; possible overflow of |
| unsigned char in contrib/tools/png-fix-itxt.c). To use the "secure" |
| file handling, define PNG_USE_MKSTEMP, otherwise "tmpfile()" will |
| be used. |
| Removed some unused WEIGHTED_FILTER macros from pngstruct.h |
| Replaced arbitrary use of 'extern' with #define PNG_LINKAGE_*. To |
| preserve API compatibility, the new defines all default to "extern" |
| (requested by Jan Nijtmans). |
| Belatedly added Mans Rullgard and James Yu to the list of Contributing |
| Authors. |
| |
| Send comments/corrections/commendations to png-mng-implement at lists.sf.net |
| (subscription required; visit |
| https://lists.sourceforge.net/lists/listinfo/png-mng-implement |
| to subscribe) |
| or to glennrp at users.sourceforge.net |
| |
| Glenn R-P |
