102 lines
4.8 KiB
Plaintext
102 lines
4.8 KiB
Plaintext
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Libpng 1.6.1 - March 28, 2013
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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:
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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-1.6.1.tar.xz (LZMA-compressed, recommended)
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libpng-1.6.1.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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lpng161.7z (LZMA-compressed, recommended)
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lpng161.zip
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Other information:
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libpng-1.6.1-README.txt
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libpng-1.6.1-LICENSE.txt
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Changes since the last public release (1.6.0):
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Made symbol prefixing work with the ARM neon optimizations. Also allow
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pngpriv.h to be included for preprocessor definitions only, so it can
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be used in non-C/C++ files. Back ported from libpng 1.7.
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Made sRGB check numbers consistent.
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Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug.
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Removed cc -E workround, corrected png_get_palette_max API Tested on
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SUN OS cc 5.9, which demonstrates the tokenization problem previously
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avoided by using /lib/cpp. Since all .dfn output is now protected in
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double quotes unless it is to be macro substituted the fix should
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work everywhere.
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Enabled parallel tests - back ported from libpng-1.7.
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scripts/pnglibconf.dfa formatting improvements back ported from libpng17.
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Fixed a race condition in the creation of the build 'scripts' directory
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while building with a parallel make.
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Use approved/supported Android method to check for NEON, use Linux/POSIX
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1003.1 API to check /proc/self/auxv avoiding buffer allocation and other
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library calls (ported from libpng15).
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Use parentheses more consistently in "#if defined(MACRO)" tests.
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Folded long lines.
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Reenabled code to allow zero length PLTE chunks for MNG.
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Fixed ALIGNED_MEMORY support.
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Allow run-time ARM NEON checking to be disabled. A new configure option:
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--enable-arm-neon=always will stop the run-time checks. New checks
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within arm/arm_init.c will cause the code not to be compiled unless
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__ARM_NEON__ is set. This should make it fail safe (if someone asks
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for it on then the build will fail if it can't be done.)
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Updated the INSTALL document.
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Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES.
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Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC.
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Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble
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with CRLF line endings.
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Avoid a possible memory leak in contrib/gregbook/readpng.c
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Better documentation of unknown handling API interactions.
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Corrected Android builds and corrected libpng.vers with symbol
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prefixing This adds an API to set optimization options externally,
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providing an alternative and general solution for the non-portable
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run-time tests used by the ARM Neon code. It also makes those tests
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compile and link on Android.
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The order of settings vs options in pnglibconf.h is reversed to allow
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settings to depend on options and options can now set (or override) the
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defaults for settings.
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Corrected simplified API default gamma for color-mapped output, added
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a flag to change default. In 1.6.0 when the simplified API was used
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to produce color-mapped output from an input image with no gamma
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information the gamma assumed for the input could be different from
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that assumed for non-color-mapped output. In particular 16-bit depth
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input files were assumed to be sRGB encoded, whereas in the 'direct'
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case they were assumed to have linear data. This was an error. The
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fix makes the simplified API treat all input files the same way and
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adds a new flag to the png_image::flags member to allow the
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application/user to specify that 16-bit files contain sRGB data
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rather than the default linear.
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Fixed bugs in the pngpixel and makepng test programs.
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Fixed CMakelists.txt to allow building a single variant of the library
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(Claudio Bley):
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Introduced a PNG_LIB_TARGETS variable that lists all activated library
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targets. It is an error if this variable ends up empty, ie. you have
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to build at least one library variant.
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Made the *_COPY targets only depend on library targets actually being build.
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Use PNG_LIB_TARGETS to unify a code path.
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Changed the CREATE_SYMLINK macro to expect the full path to a file as the
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first argument. When symlinking the filename component of that path is
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determined and used as the link target.
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Use copy_if_different in the CREATE_SYMLINK macro.
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Eliminated two warnings from the Intel C compiler. The warnings are
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technically valid, although a reasonable treatment of division would
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show it to be incorrect.
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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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