| 1 | libpng 1.6.36 - December 1, 2018
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| 2 | ================================
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| 3 |
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| 4 | This is a public release of libpng, intended for use in production code.
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| 5 |
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| 6 |
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| 7 | Files available for download
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| 8 | ----------------------------
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| 9 |
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| 10 | Source files with LF line endings (for Unix/Linux):
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| 11 |
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| 12 | * libpng-1.6.36.tar.xz (LZMA-compressed, recommended)
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| 13 | * libpng-1.6.36.tar.gz
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| 14 |
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| 15 | Source files with CRLF line endings (for Windows):
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| 16 |
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| 17 | * lp1636.7z (LZMA-compressed, recommended)
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| 18 | * lp1636.zip
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| 19 |
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| 20 | Other information:
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| 21 |
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| 22 | * README.md
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| 23 | * LICENSE.md
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| 24 | * AUTHORS.md
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| 25 | * TRADEMARK.md
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| 26 |
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| 27 |
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| 28 | IMPORTANT licensing update: libpng license v2
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| 29 | ---------------------------------------------
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| 30 |
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| 31 | The new libpng license comprises the terms and conditions from the zlib
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| 32 | license, and the disclaimer from the Boost license.
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| 33 |
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| 34 | The legacy libpng license, used until libpng-1.6.35, is appended to the
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| 35 | new license, following the precedent established in the Python Software
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| 36 | Foundation License version 2.
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| 37 |
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| 38 | From now on, the list of contributing authors shall be maintained in a
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| 39 | separate AUTHORS file. The lists of previous contributing authors,
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| 40 | mentioned in the legacy libpng license and considered to be an integral
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| 41 | part of that license, are kept intact, with no further updates.
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| 42 |
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| 43 |
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| 44 | Changes since the previous public release (version 1.6.35)
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| 45 | ----------------------------------------------------------
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| 46 |
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| 47 | * Optimized png_do_expand_palette for ARM processors.
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| 48 | Improved performance by around 10-22% on a recent ARM Chromebook.
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| 49 | (Contributed by Richard Townsend, ARM Holdings)
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| 50 | * Fixed manipulation of machine-specific optimization options.
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| 51 | (Contributed by Vicki Pfau)
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| 52 | * Used memcpy instead of manual pointer arithmetic on Intel SSE2.
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| 53 | (Contributed by Samuel Williams)
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| 54 | * Fixed build errors with MSVC on ARM64.
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| 55 | (Contributed by Zhijie Liang)
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| 56 | * Fixed detection of libm in CMakeLists.
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| 57 | (Contributed by Cameron Cawley)
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| 58 | * Fixed incorrect creation of pkg-config file in CMakeLists.
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| 59 | (Contributed by Kyle Bentley)
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| 60 | * Fixed the CMake build on Windows MSYS by avoiding symlinks.
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| 61 | * Fixed a build warning on OpenBSD.
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| 62 | (Contributed by Theo Buehler)
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| 63 | * Fixed various typos in comments.
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| 64 | (Contributed by "luz.paz")
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| 65 | * Raised the minimum required CMake version from 3.0.2 to 3.1.
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| 66 | * Removed yet more of the vestigial support for pre-ANSI C compilers.
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| 67 | * Removed ancient makefiles for ancient systems that have been broken
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| 68 | across all previous libpng-1.6.x versions.
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| 69 | * Removed the Y2K compliance statement and the export control
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| 70 | information.
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| 71 | * Applied various code style and documentation fixes.
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| 72 |
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| 73 |
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| 74 | Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
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| 75 | Subscription is required; visit
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| 76 | https://lists.sourceforge.net/lists/listinfo/png-mng-implement
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| 77 | to subscribe.
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