| Libpng 1.6.22 - May 26, 2016 |
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| This is a public release of libpng, intended for use in production codes. |
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| Files available for download: |
| |
| Source files with LF line endings (for Unix/Linux) and with a |
| "configure" script |
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| libpng-1.6.22.tar.xz (LZMA-compressed, recommended) |
| libpng-1.6.22.tar.gz |
| |
| Source files with CRLF line endings (for Windows), without the |
| "configure" script |
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| lpng1622.7z (LZMA-compressed, recommended) |
| lpng1622.zip |
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| Other information: |
| |
| libpng-1.6.22-README.txt |
| libpng-1.6.22-LICENSE.txt |
| libpng-1.6.22-*.asc (armored detached GPG signatures) |
| |
| Changes since the last public release (1.6.21): |
| Changed PNG_USE_MKSTEMP to __COVERITY__ to select alternate |
| "tmpfile()" implementation in contrib/libtests/pngstest.c |
| Fixed NO_STDIO build of pngunknown.c to skip calling png_init_io() |
| if there is no stdio.h support. |
| Added a png_image_write_to_memory() API and a number of assist macros |
| to allow an application that uses the simplified API write to bypass |
| stdio and write directly to memory. |
| Added some warnings (png.h) and some check code to detect *possible* |
| overflow in the ROW_STRIDE and simplified image SIZE macros. This |
| disallows image width/height/format that *might* overflow. This is |
| a quiet API change that limits in-memory image size (uncompressed) to |
| less than 4GByte and image row size (stride) to less than 2GByte. |
| Revised workaround for false-positive Coverity issue in pngvalid.c. |
| Only use exit(77) in configure builds. |
| Updated CMakeLists.txt, added supporting scripts/gen*.cmake.in |
| and test.cmake.in (Roger Leigh). |
| Relaxed limit checks on gamma values in pngrtran.c. As suggested in |
| the comments gamma values outside the range currently permitted |
| by png_set_alpha_mode are useful for HDR data encoding. These values |
| are already permitted by png_set_gamma so it is reasonable caution to |
| extend the png_set_alpha_mode range as HDR imaging systems are starting |
| to emerge. |
| Added a common-law trademark notice and export control information |
| to the LICENSE file, png.h, and the man page. |
| Restored "& 0xff" in png_save_uint_16() and png_save_uint_32() that |
| were accidentally removed from libpng-1.6.17. |
| Changed PNG_INFO_cHNK and PNG_FREE_cHNK from 0xnnnn to 0xnnnnU in png.h |
| (Robert C. Seacord). |
| Removed dubious "#if INT_MAX" test from png.h that was added to |
| libpng-1.6.19 (John Bowler). |
| Add ${INCLUDES} in scripts/genout.cmake.in (Bug report by Nixon Kwok). |
| Updated LICENSE to say files in the contrib directory are not |
| necessarily under the libpng license, and that some makefiles have |
| other copyright owners. |
| Added INTEL-SSE2 support (Mike Klein and Matt Sarett, Google, Inc.). |
| Made contrib/libtests/timepng more robust. The code no longer gives |
| up/fails on invalid PNG data, it just skips it (with error messages). |
| The code no longer fails on PNG files with data beyond IEND. Options |
| exist to use png_read_png (reading the whole image, not by row) and, in |
| that case, to apply any of the supported transforms. This makes for |
| more realistic testing; the decoded data actually gets used in a |
| meaningful fashion (John Bowler). |
| Fixed some misleading indentation (Krishnaraj Bhat). |
| Force GCC compilation to C89 if needed (Dagobert Michelsen). |
| SSE filter speed improvements for bpp=3: |
| memcpy-free implementations of load3() / store3(). |
| call load3() only when needed at the end of a scanline. |
| Added PNG_FAST_FILTERS macro (defined as |
| PNG_FILTER_NONE|PNG_FILTER_SUB|PNG_FILTER_UP). |
| Various fixes for contrib/libtests/timepng.c |
| Fixed typo (missing underscore) in #define PNG_READ_16_TO_8_SUPPORTED |
| (Bug report by Y.Ohashik). |
| Quieted two Coverity issues in contrib/libtests/timepng.c. |
| Fixed issues with scripts/genout.cmake.in (David Capello, Nixon Kwok): |
| Added support to use multiple directories in ZLIBINCDIR variable, |
| Fixed CMAKE_C_FLAGS with multiple values when genout is compiled on MSVC, |
| Fixed pnglibconf.c compilation on OS X including the sysroot path. |
| Check for CLOCK_PROCESS_CPUTIME_ID when building /contrib/libtests/timepng. |
| Check for the presence of clock_gettime() in configure.ac and Makefile.am. |
| |
| (subscription required; visit |
| https://lists.sourceforge.net/lists/listinfo/png-mng-implement |
| to subscribe) |
| or to glennrp at users.sourceforge.net |
| |
| Glenn R-P |
