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Release libpng version 1.6.36
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103 changes: 64 additions & 39 deletions ANNOUNCE
Original file line number Diff line number Diff line change
@@ -1,52 +1,77 @@
Libpng 1.6.36.git

This is a development version, not intended to be a public release.
It will be replaced by a public release, or by another development
version, at a later time.

Libpng 1.6.35 - July 15, 2018
libpng 1.6.36 - December 1, 2018
================================

This is a public release of libpng, intended for use in production code.

Files available for download:

Files available for download
----------------------------

Source files with LF line endings (for Unix/Linux):

libpng-1.6.35.tar.xz (LZMA-compressed, recommended)
libpng-1.6.35.tar.gz
* libpng-1.6.36.tar.xz (LZMA-compressed, recommended)
* libpng-1.6.36.tar.gz

Source files with CRLF line endings (for Windows):

lp1635.7z (LZMA-compressed, recommended)
lp1635.zip
* lp1636.7z (LZMA-compressed, recommended)
* lp1636.zip

Other information:

libpng-1.6.35-README.txt
libpng-1.6.35-LICENSE.txt

Changes since the previous public release (1.6.34):

Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
Added calls to png_set_*() transforms commonly used by browsers to
the fuzzer.
Removed some unnecessary brackets in pngrtran.c
Fixed miscellaneous typos (Patch by github user "luzpaz").
Change "ASM C" to "C ASM" in CMakeLists.txt
Fixed incorrect handling of bKGD chunk in sub-8-bit files (Cosmin)
Added hardware optimization directories to zip and 7z distributions.
Fixed incorrect bitmask for options.
Fixed many spelling typos.
Make png_get_iCCP consistent with man page (allow compression-type argument
to be NULL, bug report by Lenard Szolnoki).
Replaced the remaining uses of png_size_t with size_t (Cosmin)
Fixed the calculation of row_factor in png_check_chunk_length
(reported by Thuan Pham in SourceForge issue #278)
Added missing parentheses to a macro definition
(suggested by "irwir" in GitHub issue #216)

Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
* README.md
* LICENSE.md
* AUTHORS.md
* TRADEMARK.md


IMPORTANT licensing update: libpng license v2
---------------------------------------------

The new libpng license comprises the terms and conditions from the zlib
license, and the disclaimer from the Boost license.

The legacy libpng license, used until libpng-1.6.35, is appended to the
new license, following the precedent established in the Python Software
Foundation License version 2.

From now on, the list of contributing authors shall be maintained in a
separate AUTHORS file. The lists of previous contributing authors,
mentioned in the legacy libpng license and considered to be an integral
part of that license, are kept intact, with no further updates.


Changes since the previous public release (version 1.6.35)
----------------------------------------------------------

* Optimized png_do_expand_palette for ARM processors.
Improved performance by around 10-22% on a recent ARM Chromebook.
(Contributed by Richard Townsend, ARM Holdings)
* Fixed manipulation of machine-specific optimization options.
(Contributed by Vicki Pfau)
* Used memcpy instead of manual pointer arithmetic on Intel SSE2.
(Contributed by Samuel Williams)
* Fixed build errors with MSVC on ARM64.
(Contributed by Zhijie Liang)
* Fixed detection of libm in CMakeLists.
(Contributed by Cameron Cawley)
* Fixed incorrect creation of pkg-config file in CMakeLists.
(Contributed by Kyle Bentley)
* Fixed the CMake build on Windows MSYS by avoiding symlinks.
* Fixed a build warning on OpenBSD.
(Contributed by Theo Buehler)
* Fixed various typos in comments.
(Contributed by "luz.paz")
* Raised the minimum required CMake version from 3.0.2 to 3.1.
* Removed yet more of the vestigial support for pre-ANSI C compilers.
* Removed ancient makefiles for ancient systems that have been broken
across all previous libpng-1.6.x versions.
* Removed the Y2K compliance statement and the export control
information.
* Applied various code style and documentation fixes.


Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
Subscription is required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe).
to subscribe.
28 changes: 26 additions & 2 deletions CHANGES
Original file line number Diff line number Diff line change
Expand Up @@ -6063,8 +6063,32 @@ Version 1.6.35 [July 15, 2018]
Added missing parentheses to a macro definition
(suggested by "irwir" in GitHub issue #216)

Version 1.6.36
[TODO]
Version 1.6.36 [December 1, 2018]
Optimized png_do_expand_palette for ARM processors.
Improved performance by around 10-22% on a recent ARM Chromebook.
(Contributed by Richard Townsend, ARM Holdings)
Fixed manipulation of machine-specific optimization options.
(Contributed by Vicki Pfau)
Used memcpy instead of manual pointer arithmetic on Intel SSE2.
(Contributed by Samuel Williams)
Fixed build errors with MSVC on ARM64.
(Contributed by Zhijie Liang)
Fixed detection of libm in CMakeLists.
(Contributed by Cameron Cawley)
Fixed incorrect creation of pkg-config file in CMakeLists.
(Contributed by Kyle Bentley)
Fixed the CMake build on Windows MSYS by avoiding symlinks.
Fixed a build warning on OpenBSD.
(Contributed by Theo Buehler)
Fixed various typos in comments.
(Contributed by "luz.paz")
Raised the minimum required CMake version from 3.0.2 to 3.1.
Removed yet more of the vestigial support for pre-ANSI C compilers.
Removed ancient makefiles for ancient systems that have been broken
across all previous libpng-1.6.x versions.
Removed the Y2K compliance statement and the export control
information.
Applied various code style and documentation fixes.

Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
Expand Down
2 changes: 1 addition & 1 deletion CMakeLists.txt
Original file line number Diff line number Diff line change
Expand Up @@ -838,7 +838,7 @@ endif()
# SET UP LINKS
if(PNG_SHARED)
set_target_properties(png PROPERTIES
# VERSION 16.${PNGLIB_RELEASE}.1.6.36.git
# VERSION 16.${PNGLIB_RELEASE}.1.6.36
VERSION 16.${PNGLIB_RELEASE}.0
SOVERSION 16
CLEAN_DIRECT_OUTPUT 1)
Expand Down
5 changes: 0 additions & 5 deletions LICENSE
Original file line number Diff line number Diff line change
@@ -1,8 +1,3 @@
This copy of the libpng notices is provided for your convenience.
In case of any discrepancy between this copy and the notices in the
file png.h that is included in the libpng distribution, the latter
shall prevail.

COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
=========================================

Expand Down
2 changes: 1 addition & 1 deletion Makefile.am
Original file line number Diff line number Diff line change
Expand Up @@ -148,7 +148,7 @@ pkgconfig_DATA = libpng@PNGLIB_MAJOR@@[email protected]
# from those directories being included. This only works if the configure is
# not done in the source directory!
EXTRA_DIST= \
ANNOUNCE CHANGES INSTALL LICENSE README TODO \
ANNOUNCE AUTHORS CHANGES INSTALL LICENSE README TODO TRADEMARK \
pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \
${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \
$(TESTS) $(XFAIL_TESTS) tests/pngstest \
Expand Down
4 changes: 2 additions & 2 deletions Makefile.in
Original file line number Diff line number Diff line change
Expand Up @@ -534,7 +534,7 @@ TEST_LOG_COMPILE = $(TEST_LOG_COMPILER) $(AM_TEST_LOG_FLAGS) \
$(TEST_LOG_FLAGS)
am__DIST_COMMON = $(dist_man_MANS) $(srcdir)/Makefile.in \
$(srcdir)/config.h.in $(srcdir)/libpng-config.in \
$(srcdir)/libpng.pc.in INSTALL README TODO compile \
$(srcdir)/libpng.pc.in AUTHORS INSTALL README TODO compile \
config.guess config.sub depcomp install-sh ltmain.sh missing \
test-driver
DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
Expand Down Expand Up @@ -784,7 +784,7 @@ pkgconfig_DATA = libpng@PNGLIB_MAJOR@@[email protected]
# from those directories being included. This only works if the configure is
# not done in the source directory!
EXTRA_DIST = \
ANNOUNCE CHANGES INSTALL LICENSE README TODO \
ANNOUNCE AUTHORS CHANGES INSTALL LICENSE README TODO TRADEMARK \
pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \
${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \
$(TESTS) $(XFAIL_TESTS) tests/pngstest \
Expand Down
31 changes: 13 additions & 18 deletions README
Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
README for libpng version 1.6.36.git.
README for libpng version 1.6.36 - December 1, 2018
===================================================

See the note about version numbers near the top of png.h.
See INSTALL for instructions on how to install libpng.
Expand Down Expand Up @@ -89,9 +90,9 @@ these at http://www.libpng.org/pub/png/pngdocs.html .
This code is currently being archived at libpng.sourceforge.io in the
[DOWNLOAD] area, and at http://libpng.download/src .

This release was created and will be supported by myself (of course
based in a large way on Glenn's, Guy's and Andreas' earlier work), and
the PNG development group.
This release, based in a large way on Glenn's, Guy's and Andreas'
earlier work, was created and will be supported by myself and the PNG
development group.

Send comments/corrections/commendations to png-mng-implement at
lists.sourceforge.net (subscription required; visit
Expand All @@ -106,11 +107,13 @@ subscribe).
Files in this distribution:

ANNOUNCE => Announcement of this version, with recent changes
AUTHORS => List of contributing authors
CHANGES => Description of changes between libpng versions
KNOWNBUG => List of known bugs and deficiencies
LICENSE => License to use and redistribute libpng
README => This file
TODO => Things not implemented in the current library
TRADEMARK => Trademark information
example.c => Example code for using libpng functions
libpng.3 => manual page for libpng (includes libpng-manual.txt)
libpng-manual.txt => Description of libpng and its functions
Expand Down Expand Up @@ -171,18 +174,10 @@ Files in this distribution:
scripts => Directory containing scripts for building libpng:
(see scripts/README.txt for the list of scripts)

Good luck, and happy coding.
Good luck, and happy coding!

* Cosmin Truta (current maintainer, since 2018)
Email: cosmin at users.sourceforge.net

* Glenn Randers-Pehrson (former maintainer, 1998-2018)
Email: glennrp at users.sourceforge.net

* Andreas Eric Dilger (former maintainer, 1996-1997)
Email: adilger at enel.ucalgary.ca
Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/

* Guy Eric Schalnat (original author and former maintainer, 1995-1996)
(formerly of Group 42, Inc)
Email: gschal at infinet.com
* Cosmin Truta (current maintainer, since 2018)
* Glenn Randers-Pehrson (former maintainer, 1998-2018)
* Andreas Eric Dilger (former maintainer, 1996-1997)
* Guy Eric Schalnat (original author and former maintainer, 1995-1996)
(formerly of Group 42, Inc.)
22 changes: 11 additions & 11 deletions configure
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69 for libpng 1.6.36.git.
# Generated by GNU Autoconf 2.69 for libpng 1.6.36.
#
# Report bugs to <[email protected]>.
#
Expand Down Expand Up @@ -590,8 +590,8 @@ MAKEFLAGS=
# Identity of this package.
PACKAGE_NAME='libpng'
PACKAGE_TARNAME='libpng'
PACKAGE_VERSION='1.6.36.git'
PACKAGE_STRING='libpng 1.6.36.git'
PACKAGE_VERSION='1.6.36'
PACKAGE_STRING='libpng 1.6.36'
PACKAGE_BUGREPORT='[email protected]'
PACKAGE_URL=''

Expand Down Expand Up @@ -1372,7 +1372,7 @@ if test "$ac_init_help" = "long"; then
# Omit some internal or obsolete options to make the list less imposing.
# This message is too long to be a string in the A/UX 3.1 sh.
cat <<_ACEOF
\`configure' configures libpng 1.6.36.git to adapt to many kinds of systems.
\`configure' configures libpng 1.6.36 to adapt to many kinds of systems.
Usage: $0 [OPTION]... [VAR=VALUE]...
Expand Down Expand Up @@ -1442,7 +1442,7 @@ fi

if test -n "$ac_init_help"; then
case $ac_init_help in
short | recursive ) echo "Configuration of libpng 1.6.36.git:";;
short | recursive ) echo "Configuration of libpng 1.6.36:";;
esac
cat <<\_ACEOF
Expand Down Expand Up @@ -1622,7 +1622,7 @@ fi
test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
cat <<\_ACEOF
libpng configure 1.6.36.git
libpng configure 1.6.36
generated by GNU Autoconf 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
Expand Down Expand Up @@ -1954,7 +1954,7 @@ cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
It was created by libpng $as_me 1.6.36.git, which was
It was created by libpng $as_me 1.6.36, which was
generated by GNU Autoconf 2.69. Invocation command line was
$ $0 $@
Expand Down Expand Up @@ -2825,7 +2825,7 @@ fi

# Define the identity of the package.
PACKAGE='libpng'
VERSION='1.6.36.git'
VERSION='1.6.36'


cat >>confdefs.h <<_ACEOF
Expand Down Expand Up @@ -2946,7 +2946,7 @@ fi



PNGLIB_VERSION=1.6.36.git
PNGLIB_VERSION=1.6.36
PNGLIB_MAJOR=1
PNGLIB_MINOR=6
PNGLIB_RELEASE=36
Expand Down Expand Up @@ -14354,7 +14354,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
This file was extended by libpng $as_me 1.6.36.git, which was
This file was extended by libpng $as_me 1.6.36, which was
generated by GNU Autoconf 2.69. Invocation command line was
CONFIG_FILES = $CONFIG_FILES
Expand Down Expand Up @@ -14420,7 +14420,7 @@ _ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
libpng config.status 1.6.36.git
libpng config.status 1.6.36
configured by $0, generated by GNU Autoconf 2.69,
with options \\"\$ac_cs_config\\"
Expand Down
4 changes: 2 additions & 2 deletions configure.ac
Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@ AC_PREREQ([2.68])

dnl Version number stuff here:

AC_INIT([libpng],[1.6.36.git],[[email protected]])
AC_INIT([libpng],[1.6.36],[[email protected]])
AC_CONFIG_MACRO_DIR([scripts])

# libpng does not follow GNU file name conventions (hence 'foreign')
Expand All @@ -46,7 +46,7 @@ dnl automake, so the following is not necessary (and is not defined anyway):
dnl AM_PREREQ([1.11.2])
dnl stop configure from automagically running automake

PNGLIB_VERSION=1.6.36.git
PNGLIB_VERSION=1.6.36
PNGLIB_MAJOR=1
PNGLIB_MINOR=6
PNGLIB_RELEASE=36
Expand Down
10 changes: 7 additions & 3 deletions libpng-manual.txt
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,10 @@ libpng-manual.txt - A description on how to use and modify libpng

Based on:

libpng version 1.6.36 - December 1, 2018
Updated and distributed by Cosmin Truta
Copyright (c) 2018 Cosmin Truta

libpng versions 0.97, January 1998, through 1.6.35 - July 15, 2018
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2018 Glenn Randers-Pehrson
Expand Down Expand Up @@ -63,17 +67,17 @@ file format in application programs.

The PNG specification (second edition), November 2003, is available as
a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at
<https://www.w3.org/TR/2003/REC-PNG-20031110/
<https://www.w3.org/TR/2003/REC-PNG-20031110/>.
The W3C and ISO documents have identical technical content.

The PNG-1.2 specification is available at
<https://png-mng.sourceforge.io/pub/png/spec/1.2/>.
It is technically equivalent
to the PNG specification (second edition) but has some additional material.

The PNG-1.0 specification is available as RFC 2083
The PNG-1.0 specification is available as RFC 2083 at
<https://png-mng.sourceforge.io/pub/png/spec/1.0/> and as a
W3C Recommendation <https://www.w3.org/TR/REC-png-961001>.
W3C Recommendation at <https://www.w3.org/TR/REC-png-961001>.

Some additional chunks are described in the special-purpose public chunks
documents at <http://www.libpng.org/pub/png/spec/register/>
Expand Down
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