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Release libpng version 1.6.36
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‎ANNOUNCE

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@@ -1,52 +1,77 @@
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Libpng 1.6.36.git
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This is a development version, not intended to be a public release.
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It will be replaced by a public release, or by another development
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version, at a later time.
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Libpng 1.6.35 - July 15, 2018
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libpng 1.6.36 - December 1, 2018
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================================
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This is a public release of libpng, intended for use in production code.
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Files available for download:
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Files available for download
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----------------------------
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Source files with LF line endings (for Unix/Linux):
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libpng-1.6.35.tar.xz (LZMA-compressed, recommended)
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libpng-1.6.35.tar.gz
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* libpng-1.6.36.tar.xz (LZMA-compressed, recommended)
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* libpng-1.6.36.tar.gz
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Source files with CRLF line endings (for Windows):
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lp1635.7z (LZMA-compressed, recommended)
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lp1635.zip
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* lp1636.7z (LZMA-compressed, recommended)
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* lp1636.zip
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Other information:
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libpng-1.6.35-README.txt
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libpng-1.6.35-LICENSE.txt
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Changes since the previous public release (1.6.34):
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Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
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failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
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Added calls to png_set_*() transforms commonly used by browsers to
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the fuzzer.
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Removed some unnecessary brackets in pngrtran.c
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Fixed miscellaneous typos (Patch by github user "luzpaz").
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Change "ASM C" to "C ASM" in CMakeLists.txt
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Fixed incorrect handling of bKGD chunk in sub-8-bit files (Cosmin)
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Added hardware optimization directories to zip and 7z distributions.
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Fixed incorrect bitmask for options.
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Fixed many spelling typos.
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Make png_get_iCCP consistent with man page (allow compression-type argument
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to be NULL, bug report by Lenard Szolnoki).
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Replaced the remaining uses of png_size_t with size_t (Cosmin)
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Fixed the calculation of row_factor in png_check_chunk_length
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(reported by Thuan Pham in SourceForge issue #278)
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Added missing parentheses to a macro definition
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(suggested by "irwir" in GitHub issue #216)
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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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* README.md
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* LICENSE.md
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* AUTHORS.md
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* TRADEMARK.md
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IMPORTANT licensing update: libpng license v2
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---------------------------------------------
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The new libpng license comprises the terms and conditions from the zlib
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license, and the disclaimer from the Boost license.
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The legacy libpng license, used until libpng-1.6.35, is appended to the
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new license, following the precedent established in the Python Software
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Foundation License version 2.
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From now on, the list of contributing authors shall be maintained in a
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separate AUTHORS file. The lists of previous contributing authors,
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mentioned in the legacy libpng license and considered to be an integral
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part of that license, are kept intact, with no further updates.
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Changes since the previous public release (version 1.6.35)
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----------------------------------------------------------
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* Optimized png_do_expand_palette for ARM processors.
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Improved performance by around 10-22% on a recent ARM Chromebook.
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(Contributed by Richard Townsend, ARM Holdings)
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* Fixed manipulation of machine-specific optimization options.
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(Contributed by Vicki Pfau)
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* Used memcpy instead of manual pointer arithmetic on Intel SSE2.
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(Contributed by Samuel Williams)
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* Fixed build errors with MSVC on ARM64.
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(Contributed by Zhijie Liang)
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* Fixed detection of libm in CMakeLists.
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(Contributed by Cameron Cawley)
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* Fixed incorrect creation of pkg-config file in CMakeLists.
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(Contributed by Kyle Bentley)
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* Fixed the CMake build on Windows MSYS by avoiding symlinks.
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* Fixed a build warning on OpenBSD.
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(Contributed by Theo Buehler)
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* Fixed various typos in comments.
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(Contributed by "luz.paz")
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* Raised the minimum required CMake version from 3.0.2 to 3.1.
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* Removed yet more of the vestigial support for pre-ANSI C compilers.
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* Removed ancient makefiles for ancient systems that have been broken
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across all previous libpng-1.6.x versions.
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* Removed the Y2K compliance statement and the export control
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information.
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* Applied various code style and documentation fixes.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
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Subscription is 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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to subscribe.

‎CHANGES

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@@ -6063,8 +6063,32 @@ Version 1.6.35 [July 15, 2018]
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Added missing parentheses to a macro definition
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(suggested by "irwir" in GitHub issue #216)
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Version 1.6.36
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[TODO]
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Version 1.6.36 [December 1, 2018]
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Optimized png_do_expand_palette for ARM processors.
6068+
Improved performance by around 10-22% on a recent ARM Chromebook.
6069+
(Contributed by Richard Townsend, ARM Holdings)
6070+
Fixed manipulation of machine-specific optimization options.
6071+
(Contributed by Vicki Pfau)
6072+
Used memcpy instead of manual pointer arithmetic on Intel SSE2.
6073+
(Contributed by Samuel Williams)
6074+
Fixed build errors with MSVC on ARM64.
6075+
(Contributed by Zhijie Liang)
6076+
Fixed detection of libm in CMakeLists.
6077+
(Contributed by Cameron Cawley)
6078+
Fixed incorrect creation of pkg-config file in CMakeLists.
6079+
(Contributed by Kyle Bentley)
6080+
Fixed the CMake build on Windows MSYS by avoiding symlinks.
6081+
Fixed a build warning on OpenBSD.
6082+
(Contributed by Theo Buehler)
6083+
Fixed various typos in comments.
6084+
(Contributed by "luz.paz")
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Raised the minimum required CMake version from 3.0.2 to 3.1.
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Removed yet more of the vestigial support for pre-ANSI C compilers.
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Removed ancient makefiles for ancient systems that have been broken
6088+
across all previous libpng-1.6.x versions.
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Removed the Y2K compliance statement and the export control
6090+
information.
6091+
Applied various code style and documentation fixes.
60686092

60696093
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
60706094
(subscription required; visit

‎CMakeLists.txt

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@@ -838,7 +838,7 @@ endif()
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# SET UP LINKS
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if(PNG_SHARED)
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set_target_properties(png PROPERTIES
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# VERSION 16.${PNGLIB_RELEASE}.1.6.36.git
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# VERSION 16.${PNGLIB_RELEASE}.1.6.36
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VERSION 16.${PNGLIB_RELEASE}.0
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SOVERSION 16
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CLEAN_DIRECT_OUTPUT 1)

‎LICENSE

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This copy of the libpng notices is provided for your convenience.
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In case of any discrepancy between this copy and the notices in the
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file png.h that is included in the libpng distribution, the latter
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shall prevail.
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COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
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=========================================
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‎Makefile.am

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@@ -148,7 +148,7 @@ pkgconfig_DATA = libpng@PNGLIB_MAJOR@@[email protected]
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# from those directories being included. This only works if the configure is
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# not done in the source directory!
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EXTRA_DIST= \
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ANNOUNCE CHANGES INSTALL LICENSE README TODO \
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ANNOUNCE AUTHORS CHANGES INSTALL LICENSE README TODO TRADEMARK \
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pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \
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${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \
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$(TESTS) $(XFAIL_TESTS) tests/pngstest \

‎Makefile.in

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$(TEST_LOG_FLAGS)
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am__DIST_COMMON = $(dist_man_MANS) $(srcdir)/Makefile.in \
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$(srcdir)/config.h.in $(srcdir)/libpng-config.in \
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$(srcdir)/libpng.pc.in INSTALL README TODO compile \
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$(srcdir)/libpng.pc.in AUTHORS INSTALL README TODO compile \
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config.guess config.sub depcomp install-sh ltmain.sh missing \
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test-driver
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DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
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# from those directories being included. This only works if the configure is
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# not done in the source directory!
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EXTRA_DIST = \
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ANNOUNCE CHANGES INSTALL LICENSE README TODO \
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ANNOUNCE AUTHORS CHANGES INSTALL LICENSE README TODO TRADEMARK \
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pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \
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${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \
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$(TESTS) $(XFAIL_TESTS) tests/pngstest \

‎README

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README for libpng version 1.6.36.git.
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README for libpng version 1.6.36 - December 1, 2018
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===================================================
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See the note about version numbers near the top of png.h.
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See INSTALL for instructions on how to install libpng.
@@ -89,9 +90,9 @@ these at http://www.libpng.org/pub/png/pngdocs.html .
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This code is currently being archived at libpng.sourceforge.io in the
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[DOWNLOAD] area, and at http://libpng.download/src .
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This release was created and will be supported by myself (of course
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based in a large way on Glenn's, Guy's and Andreas' earlier work), and
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the PNG development group.
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This release, based in a large way on Glenn's, Guy's and Andreas'
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earlier work, was created and will be supported by myself and the PNG
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development group.
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Send comments/corrections/commendations to png-mng-implement at
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lists.sourceforge.net (subscription required; visit
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Files in this distribution:
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108109
ANNOUNCE => Announcement of this version, with recent changes
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AUTHORS => List of contributing authors
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CHANGES => Description of changes between libpng versions
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KNOWNBUG => List of known bugs and deficiencies
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LICENSE => License to use and redistribute libpng
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README => This file
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TODO => Things not implemented in the current library
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TRADEMARK => Trademark information
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example.c => Example code for using libpng functions
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libpng.3 => manual page for libpng (includes libpng-manual.txt)
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libpng-manual.txt => Description of libpng and its functions
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scripts => Directory containing scripts for building libpng:
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(see scripts/README.txt for the list of scripts)
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Good luck, and happy coding.
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Good luck, and happy coding!
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* Cosmin Truta (current maintainer, since 2018)
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Email: cosmin at users.sourceforge.net
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* Glenn Randers-Pehrson (former maintainer, 1998-2018)
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Email: glennrp at users.sourceforge.net
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* Andreas Eric Dilger (former maintainer, 1996-1997)
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Email: adilger at enel.ucalgary.ca
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Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
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* Guy Eric Schalnat (original author and former maintainer, 1995-1996)
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(formerly of Group 42, Inc)
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Email: gschal at infinet.com
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* Cosmin Truta (current maintainer, since 2018)
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* Glenn Randers-Pehrson (former maintainer, 1998-2018)
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* Andreas Eric Dilger (former maintainer, 1996-1997)
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* Guy Eric Schalnat (original author and former maintainer, 1995-1996)
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(formerly of Group 42, Inc.)

‎configure

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#! /bin/sh
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# Guess values for system-dependent variables and create Makefiles.
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# Generated by GNU Autoconf 2.69 for libpng 1.6.36.git.
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# Generated by GNU Autoconf 2.69 for libpng 1.6.36.
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#
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# Report bugs to <[email protected]>.
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#
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# Identity of this package.
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PACKAGE_NAME='libpng'
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PACKAGE_TARNAME='libpng'
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PACKAGE_VERSION='1.6.36.git'
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PACKAGE_STRING='libpng 1.6.36.git'
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PACKAGE_VERSION='1.6.36'
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PACKAGE_STRING='libpng 1.6.36'
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PACKAGE_BUGREPORT='[email protected]'
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PACKAGE_URL=''
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# Omit some internal or obsolete options to make the list less imposing.
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# This message is too long to be a string in the A/UX 3.1 sh.
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cat <<_ACEOF
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\`configure' configures libpng 1.6.36.git to adapt to many kinds of systems.
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\`configure' configures libpng 1.6.36 to adapt to many kinds of systems.
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Usage: $0 [OPTION]... [VAR=VALUE]...
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if test -n "$ac_init_help"; then
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case $ac_init_help in
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short | recursive ) echo "Configuration of libpng 1.6.36.git:";;
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short | recursive ) echo "Configuration of libpng 1.6.36:";;
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esac
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cat <<\_ACEOF
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test -n "$ac_init_help" && exit $ac_status
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if $ac_init_version; then
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cat <<\_ACEOF
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libpng configure 1.6.36.git
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libpng configure 1.6.36
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generated by GNU Autoconf 2.69
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Copyright (C) 2012 Free Software Foundation, Inc.
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This file contains any messages produced by compilers while
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running configure, to aid debugging if configure makes a mistake.
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It was created by libpng $as_me 1.6.36.git, which was
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It was created by libpng $as_me 1.6.36, which was
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generated by GNU Autoconf 2.69. Invocation command line was
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$ $0 $@
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# Define the identity of the package.
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PACKAGE='libpng'
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VERSION='1.6.36.git'
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VERSION='1.6.36'
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cat >>confdefs.h <<_ACEOF
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PNGLIB_VERSION=1.6.36.git
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PNGLIB_VERSION=1.6.36
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PNGLIB_MAJOR=1
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PNGLIB_MINOR=6
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PNGLIB_RELEASE=36
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# report actual input values of CONFIG_FILES etc. instead of their
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# values after options handling.
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ac_log="
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This file was extended by libpng $as_me 1.6.36.git, which was
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This file was extended by libpng $as_me 1.6.36, which was
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generated by GNU Autoconf 2.69. Invocation command line was
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CONFIG_FILES = $CONFIG_FILES
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cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
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ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
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ac_cs_version="\\
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libpng config.status 1.6.36.git
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libpng config.status 1.6.36
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configured by $0, generated by GNU Autoconf 2.69,
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with options \\"\$ac_cs_config\\"
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‎configure.ac

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dnl Version number stuff here:
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AC_INIT([libpng],[1.6.36.git],[[email protected]])
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AC_INIT([libpng],[1.6.36],[[email protected]])
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AC_CONFIG_MACRO_DIR([scripts])
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# libpng does not follow GNU file name conventions (hence 'foreign')
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dnl AM_PREREQ([1.11.2])
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dnl stop configure from automagically running automake
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PNGLIB_VERSION=1.6.36.git
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PNGLIB_VERSION=1.6.36
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PNGLIB_MINOR=6
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PNGLIB_RELEASE=36

‎libpng-manual.txt

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Based on:
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libpng version 1.6.36 - December 1, 2018
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Updated and distributed by Cosmin Truta
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Copyright (c) 2018 Cosmin Truta
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libpng versions 0.97, January 1998, through 1.6.35 - July 15, 2018
1317
Updated and distributed by Glenn Randers-Pehrson
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Copyright (c) 1998-2018 Glenn Randers-Pehrson
@@ -63,17 +67,17 @@ file format in application programs.
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The PNG specification (second edition), November 2003, is available as
6569
a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at
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<https://www.w3.org/TR/2003/REC-PNG-20031110/
70+
<https://www.w3.org/TR/2003/REC-PNG-20031110/>.
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The W3C and ISO documents have identical technical content.
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6973
The PNG-1.2 specification is available at
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<https://png-mng.sourceforge.io/pub/png/spec/1.2/>.
7175
It is technically equivalent
7276
to the PNG specification (second edition) but has some additional material.
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74-
The PNG-1.0 specification is available as RFC 2083
78+
The PNG-1.0 specification is available as RFC 2083 at
7579
<https://png-mng.sourceforge.io/pub/png/spec/1.0/> and as a
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W3C Recommendation <https://www.w3.org/TR/REC-png-961001>.
80+
W3C Recommendation at <https://www.w3.org/TR/REC-png-961001>.
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7882
Some additional chunks are described in the special-purpose public chunks
7983
documents at <http://www.libpng.org/pub/png/spec/register/>

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