[master] Imported from libpng-1.6.31.tar
diff --git a/ANNOUNCE b/ANNOUNCE
index 51c3a7c..94a3969 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,4 +1,4 @@
-Libpng 1.6.30 - June 28, 2017
+Libpng 1.6.31 - July 27, 2017
This is a public release of libpng, intended for use in production codes.
@@ -7,42 +7,51 @@
Source files with LF line endings (for Unix/Linux) and with a
"configure" script
- libpng-1.6.30.tar.xz (LZMA-compressed, recommended)
- libpng-1.6.30.tar.gz
+ libpng-1.6.31.tar.xz (LZMA-compressed, recommended)
+ libpng-1.6.31.tar.gz
Source files with CRLF line endings (for Windows), without the
"configure" script
- lpng1630.7z (LZMA-compressed, recommended)
- lpng1630.zip
+ lpng1631.7z (LZMA-compressed, recommended)
+ lpng1631.zip
Other information:
- libpng-1.6.30-README.txt
- libpng-1.6.30-LICENSE.txt
- libpng-1.6.30-*.asc (armored detached GPG signatures)
+ libpng-1.6.31-README.txt
+ libpng-1.6.31-LICENSE.txt
+ libpng-1.6.31-*.asc (armored detached GPG signatures)
-Changes since the last public release (1.6.29):
+Changes since the last public release (1.6.30):
- Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in
- makefile.linux and makefile.solaris-x86 (Cosmin).
- Revised documentation of png_get_error_ptr() in the libpng manual.
- Silence clang -Wcomma and const drop warnings (Viktor Szakats).
- Update Sourceforge URLs in documentation (https instead of http).
- Document need to check for integer overflow when allocating a pixel
- buffer for multiple rows in contrib/gregbook, contrib/pngminus,
- example.c, and in the manual (suggested by Jaeseung Choi). This
- is similar to the bug reported against pngquant in CVE-2016-5735.
- Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation.
- Check for integer overflow in contrib/visupng and contrib/tools/genpng.
- Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt.
- Test CMAKE_HOST_WIN32 instead of WIN32 in CMakeLists.txt.
- Fix some URL in documentation.
- Avoid writing an empty IDAT when the last IDAT exactly fills the
- compression buffer (bug report by Brian Baird). This bug was
- introduced in libpng-1.6.0.
- Update copyright year in pnglibconf.h, make ltmain.sh executable.
- Add a reference to the libpng.download site in README.
+ Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it;
+ bug report by Michael Felt).
+ Revised pngpriv.h to work around failure to compile arm/filter_neon.S
+ ("typedef" directive is unrecognized by the assembler). The problem
+ was introduced in libpng-1.6.30beta01.
+ Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx).
+ Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish).
+ Added instructions for disabling hardware optimizations in INSTALL.
+ Added "--enable-hardware-optimizations" configuration flag to enable
+ or disable all hardware optimizations with one flag.
+ Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms.
+ Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent
+ possible integer overflow (Bug report by John Bowler).
+ Quieted "declaration after statement" warnings in intel/filter_sse2.c.
+ Added scripts/makefile-linux-opt, which has hardware optimizations enabled.
+ Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when
+ integers appear on both sides of a compare. Worked around the others by
+ forcing the strict-overflow setting in the relevant functions to a level
+ where they are not reported (John Bowler).
+ Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like
+ the space.
+ Worked around some C-style casts from (void*) because g++ 5.4.0 objects
+ to them.
+ Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint
+ overflow' check that is on by default with -Wall -Wextra.
+ Added eXIf chunk support.
+ Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm
+ tags) to pngtest.png.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
diff --git a/CHANGES b/CHANGES
index b8e0f97..a2f367a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5855,6 +5855,59 @@
Version 1.6.30 [June 28, 2017]
No changes.
+Version 1.6.31beta01 [July 5, 2017]
+ Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it;
+ bug report by Michael Felt).
+ Revised pngpriv.h to work around failure to compile arm/filter_neon.S
+ ("typedef" directive is unrecognized by the assembler). The problem
+ was introduced in libpng-1.6.30beta01.
+ Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx).
+ Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish).
+
+Version 1.6.31beta02 [July 8, 2017]
+ Added instructions for disabling hardware optimizations in INSTALL.
+ Added "--enable-hardware-optimizations" configuration flag to enable
+ or disable all hardware optimizations with one flag.
+
+Version 1.6.31beta03 [July 9, 2017]
+ Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms.
+ Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent
+ possible integer overflow (Bug report by John Bowler).
+ Quieted "declaration after statement" warnings in intel/filter_sse2.c.
+ Added scripts/makefile-linux-opt, which has hardware optimizations enabled.
+
+Version 1.6.31beta04 [July 11, 2017]
+ Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when
+ integers appear on both sides of a compare. Worked around the others by
+ forcing the strict-overflow setting in the relevant functions to a level
+ where they are not reported (John Bowler).
+ Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like
+ the space.
+ Worked around some C-style casts from (void*) because g++ 5.4.0 objects
+ to them.
+ Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint
+ overflow' check that is on by default with -Wall -Wextra.
+
+Version 1.6.31beta05 [July 13, 2017]
+ Added eXIf chunk support.
+
+Version 1.6.31beta06 [July 17, 2017]
+ Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm
+ tags) to pngtest.png.
+
+Version 1.6.31beta07 [July 18, 2017]
+ Revised the eXIf chunk in pngtest.png to fix "Bad IFD1 Directory" warning.
+
+Version 1.6.31rc01 [July 19, 2017]
+ No changes.
+
+Version 1.6.31rc02 [July 25, 2017]
+ Fixed typo in example.c (png_free_image should be png_image_free) (Bug
+ report by John Smith)
+
+Version 1.6.31 [July 27, 2017]
+ No changes.
+
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 739ce15..0c72c36 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
# CMakeLists.txt
-# Copyright (C) 2007,2009-2016 Glenn Randers-Pehrson
+# Copyright (C) 2007,2009-2017 Glenn Randers-Pehrson
# Written by Christian Ehrlicher, 2007
# Revised by Roger Lowman, 2009-2010
# Revised by Clifford Yapp, 2011-2012
@@ -36,7 +36,7 @@
set(PNGLIB_MAJOR 1)
set(PNGLIB_MINOR 6)
-set(PNGLIB_RELEASE 30)
+set(PNGLIB_RELEASE 31)
set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
@@ -76,9 +76,13 @@
option(PNG_DEBUG "Build with debug output" OFF)
option(PNGARG "Disable ANSI-C prototypes" OFF)
+option(PNG_HARDWARE_OPTIMIZATIONS "Enable Hardware Optimizations" ON)
+
+
set(PNG_PREFIX "" CACHE STRING "Prefix to add to the API function names")
set(DFA_XTRA "" CACHE FILEPATH "File containing extra configuration settings")
+if(PNG_HARDWARE_OPTIMIZATIONS)
# set definitions and sources for arm
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
@@ -112,11 +116,9 @@
# set definitions and sources for powerpc
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*" )
- set(PNG_POWERPC_VSX_POSSIBLE_VALUES check on off)
- set(PNG_POWERPC_VSX "check" CACHE STRING "Enable POWERPC VSX optimizations:
- check: (default) use internal checking code;
- off: disable the optimizations;
- on: turn on unconditionally.")
+ set(PNG_POWERPC_VSX_POSSIBLE_VALUES on off)
+ set(PNG_POWERPC_VSX "on" CACHE STRING "Enable POWERPC VSX optimizations:
+ off: disable the optimizations.")
set_property(CACHE PNG_POWERPC_VSX PROPERTY STRINGS
${PNG_POWERPC_VSX_POSSIBLE_VALUES})
list(FIND PNG_POWERPC_VSX_POSSIBLE_VALUES ${PNG_POWERPC_VSX} index)
@@ -127,19 +129,62 @@
set(libpng_powerpc_sources
powerpc/powerpc_init.c
powerpc/filter_vsx_intrinsics.c)
-
if(${PNG_POWERPC_VSX} STREQUAL "on")
add_definitions(-DPNG_POWERPC_VSX_OPT=2)
- elseif(${PNG_POWERPC_VSX} STREQUAL "check")
- add_definitions(-DPNG_POWERPC_VSX_CHECK_SUPPORTED)
- message(WARNING
- "[PNG_POWERPC_VSX==check] Please check contrib/powerpc/README file for the list of supported OSes.")
endif()
else()
add_definitions(-DPNG_POWERPC_VSX_OPT=0)
endif()
endif()
+# set definitions and sources for intel
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "^i?86" OR
+ CMAKE_SYSTEM_PROCESSOR MATCHES "^x86_64*" )
+ set(PNG_INTEL_SSE_POSSIBLE_VALUES on off)
+ set(PNG_INTEL_SSE "on" CACHE STRING "Enable INTEL_SSE optimizations:
+ off: disable the optimizations")
+ set_property(CACHE PNG_INTEL_SSE PROPERTY STRINGS
+ ${PNG_INTEL_SSE_POSSIBLE_VALUES})
+ list(FIND PNG_INTEL_SSE_POSSIBLE_VALUES ${PNG_INTEL_SSE} index)
+ if(index EQUAL -1)
+ message(FATAL_ERROR
+ " PNG_INTEL_SSE must be one of [${PNG_INTEL_SSE_POSSIBLE_VALUES}]")
+ elseif(NOT ${PNG_INTEL_SSE} STREQUAL "no")
+ set(libpng_intel_sources
+ intel/intel_init.c
+ intel/filter_sse2_intrinsics.c)
+ if(${PNG_INTEL_SSE} STREQUAL "on")
+ add_definitions(-DPNG_INTEL_SSE_OPT=1)
+ endif()
+ else()
+ add_definitions(-DPNG_INTEL_SSE_OPT=0)
+ endif()
+endif()
+
+# set definitions and sources for MIPS
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "mipsel*" OR
+ CMAKE_SYSTEM_PROCESSOR MATCHES "mips64el*" )
+ set(PNG_MIPS_MSA_POSSIBLE_VALUES on off)
+ set(PNG_MIPS_MSA "on" CACHE STRING "Enable MIPS_MSA optimizations:
+ off: disable the optimizations")
+ set_property(CACHE PNG_MIPS_MSA PROPERTY STRINGS
+ ${PNG_MIPS_MSA_POSSIBLE_VALUES})
+ list(FIND PNG_MIPS_MSA_POSSIBLE_VALUES ${PNG_MIPS_MSA} index)
+ if(index EQUAL -1)
+ message(FATAL_ERROR
+ " PNG_MIPS_MSA must be one of [${PNG_MIPS_MSA_POSSIBLE_VALUES}]")
+ elseif(NOT ${PNG_MIPS_MSA} STREQUAL "no")
+ set(libpng_mips_sources
+ mips/mips_init.c
+ mips/filter_msa_intrinsics.c)
+ if(${PNG_MIPS_MSA} STREQUAL "on")
+ add_definitions(-DPNG_MIPS_MSA_OPT=2)
+ endif()
+ else()
+ add_definitions(-DPNG_MIPS_MSA_OPT=0)
+ endif()
+endif()
+endif(PNG_HARDWARE_OPTIMIZATIONS)
# SET LIBNAME
set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
@@ -432,6 +477,8 @@
pngwtran.c
pngwutil.c
${libpng_arm_sources}
+ ${libpng_intel_sources}
+ ${libpng_mips_sources}
${libpng_powerpc_sources}
)
set(pngtest_sources
@@ -726,12 +773,12 @@
DEPENDS ${PNG_LIB_TARGETS}
)
ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
- else(WIN32 AND NOT CYGWIN AND NOT MSYS)
+ else(CMAKE_HOST_WIN32 AND NOT CYGWIN AND NOT MSYS)
get_filename_component(LINK_TARGET "${SRC_FILE}" NAME)
execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
- endif(WIN32 AND NOT CYGWIN AND NOT MSYS)
+ endif(CMAKE_HOST_WIN32 AND NOT CYGWIN AND NOT MSYS)
endmacro()
# Create source generation scripts.
@@ -770,7 +817,7 @@
# SET UP LINKS
if(PNG_SHARED)
set_target_properties(png PROPERTIES
-# VERSION 16.${PNGLIB_RELEASE}.1.6.30
+# VERSION 16.${PNGLIB_RELEASE}.1.6.31
VERSION 16.${PNGLIB_RELEASE}.0
SOVERSION 16
CLEAN_DIRECT_OUTPUT 1)
@@ -855,7 +902,7 @@
DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
DESTINATION bin)
- endif(NOT WIN32 OR CYGWIN OR MINGW)
+ endif(NOT CMAKE_HOST_WIN32 OR CYGWIN OR MINGW)
endif()
# On versions of CMake that support it, create an export file CMake
diff --git a/INSTALL b/INSTALL
index 48b1250..e8edb72 100644
--- a/INSTALL
+++ b/INSTALL
@@ -16,10 +16,11 @@
XI. Prepending a prefix to exported symbols
XII. Configuring for compiler xxx:
XIII. Removing unwanted object code
- XIV. Changes to the build and configuration of libpng in libpng-1.5.x
- XV. Setjmp/longjmp issues
- XVI. Common linking failures
- XVII. Other sources of information about libpng
+ XIV. Enabling or disabling hardware optimizations
+ XV. Changes to the build and configuration of libpng in libpng-1.5.x
+ XVI. Setjmp/longjmp issues
+ XVII. Common linking failures
+ XVIII. Other sources of information about libpng
I. Simple installation
@@ -281,7 +282,57 @@
The size of the library itself should not be an issue, because only
those sections that are actually used will be loaded into memory.
-XIV. Changes to the build and configuration of libpng in libpng-1.5.x
+XIV. Enabling or disabling hardware optimizations
+
+Certain hardware capabilites, such as the Intel SSE instructions,
+are normally detected at run time. Enable them with configure options
+such as one of
+
+ --enable-arm-neon=yes
+ --enable-mips-msa=yes
+ --enable-intel-sse=yes
+ --enable-powerpc-vsx=yes
+
+or enable them all at once with
+
+ --enable-hardware-optimizations=yes
+
+or, if you are not using "configure", you can use one
+or more of
+
+ CPPFLAGS += "-DPNG_ARM_NEON"
+ CPPFLAGS += "-DPNG_MIPS_MSA"
+ CPPFLAGS += "-DPNG_INTEL_SSE"
+ CPPFLAGS += "-DPNG_POWERPC_VSX"
+
+See for example scripts/makefile.linux-opt
+
+If you wish to avoid using them,
+you can disable them via the configure option
+
+ --disable-hardware-optimizations
+
+to disable them all, or
+
+ --enable-intel-sse=no
+
+to disable a particular one,
+or via compiler-command options such as
+
+ CPPFLAGS += "-DPNG_ARM_NEON_OPT=0, -DPNG_MIPS_MSA_OPT=0,
+ -DPNG_INTEL_SSE_OPT=0, -DPNG_POWERPC_VSX_OPT=0"
+
+If you are using cmake, hardware optimizations are "on"
+by default. To disable them, use
+
+ cmake . -DPNG_ARM_NEON=no -DPNG_INTEL_SSE=no \
+ -DPNG_MIPS_MSA=no -DPNG_POWERPC_VSX=no
+
+or disable them all at once with
+
+ cmake . -DPNG_HARDWARE_OPTIMIZATIONS=no
+
+XV. Changes to the build and configuration of libpng in libpng-1.5.x
Details of internal changes to the library code can be found in the CHANGES
file and in the GIT repository logs. These will be of no concern to the vast
@@ -372,7 +423,7 @@
libpng, because than the settings would not accurately reflect the settings
that were used to build libpng.
-XV. Setjmp/longjmp issues
+XVI. Setjmp/longjmp issues
Libpng uses setjmp()/longjmp() for error handling. Unfortunately setjmp()
is known to be not thread-safe on some platforms and we don't know of
@@ -390,7 +441,7 @@
with PNG_SETJMP_SUPPORTED defined, or with PNG_SIMPLIFIED_READ_SUPPORTED
and PNG_SIMPLIFIED_WRITE_SUPPORTED undefined.
-XVI. Common linking failures
+XVII. Common linking failures
If your application fails to find libpng or zlib entries while linking:
@@ -402,7 +453,7 @@
If you are using the vstudio project, observe the WARNING in
project/vstudio/README.txt.
-XVII. Other sources of information about libpng:
+XVIII. Other sources of information about libpng:
Further information can be found in the README and libpng-manual.txt
files, in the individual makefiles, in png.h, and the manual pages
diff --git a/LICENSE b/LICENSE
index 9e93578..1df0cbb 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@
This code is released under the libpng license.
-libpng versions 1.0.7, July 1, 2000 through 1.6.30, June 28, 2017 are
+libpng versions 1.0.7, July 1, 2000 through 1.6.31, July 27, 2017 are
Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
derived from libpng-1.0.6, and are distributed according to the same
disclaimer and license as libpng-1.0.6 with the following individuals
diff --git a/README b/README
index 65dccaf..1f68cfa 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.6.30 - June 28, 2017 (shared library 16.0)
+README for libpng version 1.6.31 - July 27, 2017 (shared library 16.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.
diff --git a/arm/filter_neon.S b/arm/filter_neon.S
index 3b061d6..000764c 100644
--- a/arm/filter_neon.S
+++ b/arm/filter_neon.S
@@ -1,9 +1,9 @@
/* filter_neon.S - NEON optimised filter functions
*
- * Copyright (c) 2014 Glenn Randers-Pehrson
+ * Copyright (c) 2014,2017 Glenn Randers-Pehrson
* Written by Mans Rullgard, 2011.
- * Last changed in libpng 1.6.16 [December 22, 2014]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@@ -16,7 +16,7 @@
#define PNG_VERSION_INFO_ONLY
#include "../pngpriv.h"
-#if defined(__linux__) && defined(__ELF__)
+#if (defined(__linux__) || defined(__FreeBSD__)) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */
#endif
diff --git a/configure.ac b/configure.ac
index 706dbf1..b1fd158 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@
dnl Version number stuff here:
-AC_INIT([libpng],[1.6.30],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.31],[png-mng-implement@lists.sourceforge.net])
AC_CONFIG_MACRO_DIR([scripts])
# libpng does not follow GNU file name conventions (hence 'foreign')
@@ -46,10 +46,10 @@
dnl AM_PREREQ([1.11.2])
dnl stop configure from automagically running automake
-PNGLIB_VERSION=1.6.30
+PNGLIB_VERSION=1.6.31
PNGLIB_MAJOR=1
PNGLIB_MINOR=6
-PNGLIB_RELEASE=30
+PNGLIB_RELEASE=31
dnl End of version number stuff
@@ -300,6 +300,55 @@
# HOST SPECIFIC OPTIONS
# =====================
#
+# DEFAULT
+# =======
+#
+AC_ARG_ENABLE([hardware-optimizations],
+ AS_HELP_STRING([[[--enable-hardware-optimizations]]],
+ [Enable hardware optimizations: =no/off, yes/on:]),
+ [case "$enableval" in
+ no|off)
+ # disable hardware optimization on all systems:
+ enable_arm_neon=no
+ AC_DEFINE([PNG_ARM_NEON_OPT], [0],
+ [Disable ARM_NEON optimizations])
+ enable_mips_msa=no
+ AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
+ [Disable MIPS_MSA optimizations])
+ enable_powerpc_vsx=no
+ AC_DEFINE([PNG_POWERPC_VSX_OPT], [0],
+ [Disable POWERPC VSX optimizations])
+ enable_intel_sse=no
+ AC_DEFINE([PNG_INTEL_SSE_OPT], [0],
+ [Disable INTEL_SSE optimizations])
+ ;;
+ *)
+ # allow enabling hardware optimization on any system:
+ case "$host_cpu" in
+ arm*|aarch64*)
+ enable_arm_neon=yes
+ AC_DEFINE([PNG_ARM_NEON_OPT], [0],
+ [Enable ARM_NEON optimizations])
+ ;;
+ mipsel*|mips64el*)
+ enable_mips_msa=yes
+ AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
+ [Enable MIPS_MSA optimizations])
+ ;;
+ i?86|x86_64)
+ enable_intel_sse=yes
+ AC_DEFINE([PNG_INTEL_SSE_OPT], [1],
+ [Enable Intel SSE optimizations])
+ ;;
+ powerpc*|ppc64*)
+ enable_powerpc_vsx=yes
+ AC_DEFINE([PNG_POWERPC_VSX_OPT], [2],
+ [Enable POWERPC VSX optimizations])
+ ;;
+ esac
+ ;;
+ esac])
+
# ARM
# ===
#
diff --git a/contrib/arm-neon/linux.c b/contrib/arm-neon/linux.c
index 94f9bb1..a9bc360 100644
--- a/contrib/arm-neon/linux.c
+++ b/contrib/arm-neon/linux.c
@@ -1,8 +1,8 @@
/* contrib/arm-neon/linux.c
*
- * Copyright (c) 2014 Glenn Randers-Pehrson
- * Written by John Bowler, 2014.
- * Last changed in libpng 1.6.16 [December 22, 2014]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
+ * Copyright (c) 2014, 2017 Glenn Randers-Pehrson
+ * Written by John Bowler, 2014, 2017.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@@ -62,7 +62,7 @@
counter=0;
state = Feature;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case Feature:
/* Match 'FEATURE', ASCII case insensitive. */
@@ -75,7 +75,7 @@
/* did not match 'feature' */
state = SkipLine;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case SkipLine:
skipLine:
@@ -110,7 +110,7 @@
state = Neon;
counter = 0;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case Neon:
/* Look for 'neon' tag */
@@ -122,7 +122,7 @@
}
state = SkipTag;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case SkipTag:
/* Skip non-space characters */
diff --git a/contrib/libtests/pngstest.c b/contrib/libtests/pngstest.c
index 30f57a9..0617dbb 100644
--- a/contrib/libtests/pngstest.c
+++ b/contrib/libtests/pngstest.c
@@ -1,9 +1,8 @@
/*-
* pngstest.c
*
- * Copyright (c) 2013-2016 John Cunningham Bowler
- *
- * Last changed in libpng 1.6.24 [August 4, 2016]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
+ * Copyright (c) 2013-2017 John Cunningham Bowler
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@@ -2746,22 +2745,27 @@
*/
else if ((a->opts & ACCUMULATE) == 0)
{
+# ifdef __GNUC__
+# define BYTE_CHARS 20 /* 2^32: GCC sprintf warning */
+# else
+# define BYTE_CHARS 3 /* 2^8: real maximum value */
+# endif
/* Check the original image first,
* TODO: deal with input images with bad pixel values?
*/
if (amax >= a->image.colormap_entries)
{
- char pindex[9];
- sprintf(pindex, "%d[%lu]", amax,
- (unsigned long)a->image.colormap_entries);
+ char pindex[3+2*BYTE_CHARS];
+ sprintf(pindex, "%d[%u]", amax,
+ (png_byte)/*SAFE*/a->image.colormap_entries);
return logerror(a, a->file_name, ": bad pixel index: ", pindex);
}
else if (bmax >= b->image.colormap_entries)
{
- char pindex[9];
- sprintf(pindex, "%d[%lu]", bmax,
- (unsigned long)b->image.colormap_entries);
+ char pindex[3+2*BYTE_CHARS];
+ sprintf(pindex, "%d[%u]", bmax,
+ (png_byte)/*SAFE*/b->image.colormap_entries);
return logerror(b, b->file_name, ": bad pixel index: ", pindex);
}
}
@@ -2881,10 +2885,13 @@
{
case 4:
if (pua[btoa[3]] != pub[3]) break;
+ /* FALLTHROUGH */
case 3:
if (pua[btoa[2]] != pub[2]) break;
+ /* FALLTHROUGH */
case 2:
if (pua[btoa[1]] != pub[1]) break;
+ /* FALLTHROUGH */
case 1:
if (pua[btoa[0]] != pub[0]) break;
if (alpha_added != 4 && pub[alpha_added] != 65535) break;
@@ -2900,10 +2907,13 @@
{
case 4:
if (psa[btoa[3]] != psb[3]) break;
+ /* FALLTHROUGH */
case 3:
if (psa[btoa[2]] != psb[2]) break;
+ /* FALLTHROUGH */
case 2:
if (psa[btoa[1]] != psb[1]) break;
+ /* FALLTHROUGH */
case 1:
if (psa[btoa[0]] != psb[0]) break;
if (alpha_added != 4 && psb[alpha_added] != 255) break;
diff --git a/contrib/libtests/pngunknown.c b/contrib/libtests/pngunknown.c
index aba605e..7bb33f8 100644
--- a/contrib/libtests/pngunknown.c
+++ b/contrib/libtests/pngunknown.c
@@ -1,8 +1,8 @@
/* pngunknown.c - test the read side unknown chunk handling
*
- * Last changed in libpng 1.6.26 [October 20, 2016]
- * Copyright (c) 2015,2016 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.31 [July 27, 2017]
+ * Copyright (c) 2015,2017 Glenn Randers-Pehrson
* Written by John Cunningham Bowler
*
* This code is released under the libpng license.
@@ -614,7 +614,7 @@
++(d->error_count);
break;
}
- /* FALL THROUGH (safe) */
+ /* FALLTHROUGH */ /* (safe) */
case PNG_HANDLE_CHUNK_ALWAYS:
break;
}
diff --git a/contrib/libtests/pngvalid.c b/contrib/libtests/pngvalid.c
index b0daa18..4dc4f84 100644
--- a/contrib/libtests/pngvalid.c
+++ b/contrib/libtests/pngvalid.c
@@ -1,7 +1,7 @@
/* pngvalid.c - validate libpng by constructing then reading png files.
*
- * Last changed in libpng 1.6.29 [March 16, 2017]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 2014-2017 John Cunningham Bowler
*
* This code is released under the libpng license.
@@ -6584,16 +6584,16 @@
{
case PNG_COLOR_TYPE_PALETTE:
if (dp->output_bit_depth > 8) goto error;
- /*FALL THROUGH*/
+ /* FALLTHROUGH */
case PNG_COLOR_TYPE_GRAY:
if (dp->output_bit_depth == 1 || dp->output_bit_depth == 2 ||
dp->output_bit_depth == 4)
break;
- /*FALL THROUGH*/
+ /* FALLTHROUGH */
default:
if (dp->output_bit_depth == 8 || dp->output_bit_depth == 16)
break;
- /*FALL THROUGH*/
+ /* FALLTHROUGH */
error:
{
char message[128];
@@ -9994,9 +9994,9 @@
case PNG_BACKGROUND_GAMMA_FILE:
case PNG_BACKGROUND_GAMMA_UNIQUE:
use_background = (alpha >= 0 && alpha < 1);
- /*FALL THROUGH*/
# endif
# ifdef PNG_READ_ALPHA_MODE_SUPPORTED
+ /* FALLTHROUGH */
case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD:
case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN:
case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED:
diff --git a/contrib/testpngs/makepngs.sh b/contrib/testpngs/makepngs.sh
index 8187587..059503e 100755
--- a/contrib/testpngs/makepngs.sh
+++ b/contrib/testpngs/makepngs.sh
@@ -5,7 +5,7 @@
# Copyright (c) 2015 John Cunningham Bowler
-# Last changed in libpng 1.7.0 [(PENDING RELEASE)]
+# Last changed in libpng 1.6.20 [December 3, 2015]
# This code is released under the libpng license.
# For conditions of distribution and use, see the disclaimer
diff --git a/contrib/tools/pngfix.c b/contrib/tools/pngfix.c
index 6da970c..69ffc17 100644
--- a/contrib/tools/pngfix.c
+++ b/contrib/tools/pngfix.c
@@ -1,8 +1,7 @@
/* pngfix.c
*
- * Copyright (c) 2014-2016 John Cunningham Bowler
- *
- * Last changed in libpng 1.6.26 [October 20, 2016]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
+ * Copyright (c) 2014-2017 John Cunningham Bowler
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@@ -2416,7 +2415,7 @@
endrc = ZLIB_TOO_FAR_BACK;
break;
}
- /* FALL THROUGH */
+ /* FALLTHROUGH */
default:
zlib_message(zlib, 0/*stream error*/);
@@ -2570,7 +2569,7 @@
list->lengths[i] -= zlib->extra_bytes;
list->count = i+1;
zlib->idat->idat_list_tail = list;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
default:
return rc;
@@ -2673,7 +2672,7 @@
/* Truncated stream; unrecoverable, gets converted to ZLIB_FATAL */
zlib.z.msg = PNGZ_MSG_CAST("[truncated]");
zlib_message(&zlib, 0/*expected*/);
- /* FALL THROUGH */
+ /* FALLTHROUGH */
default:
/* Unrecoverable error; skip the chunk; a zlib_message has already
@@ -3341,7 +3340,7 @@
if (file->state != STATE_IDAT && length > 0)
setpos(chunk);
}
- /* FALL THROUGH */
+ /* FALLTHROUGH */
default:
assert(chunk != NULL);
diff --git a/example.c b/example.c
index a71000f..99d2f05 100644
--- a/example.c
+++ b/example.c
@@ -114,13 +114,13 @@
else
{
- /* Calling png_free_image is optional unless the simplified API was
+ /* Calling png_image_free is optional unless the simplified API was
* not run to completion. In this case if there wasn't enough
* memory for 'buffer' we didn't complete the read, so we must free
* the image:
*/
if (buffer == NULL)
- png_free_image(&image);
+ png_image_free(&image);
else
free(buffer);
diff --git a/intel/filter_sse2_intrinsics.c b/intel/filter_sse2_intrinsics.c
index b91d8da..5e8553f 100644
--- a/intel/filter_sse2_intrinsics.c
+++ b/intel/filter_sse2_intrinsics.c
@@ -5,7 +5,7 @@
* Written by Mike Klein and Matt Sarett
* Derived from arm/filter_neon_intrinsics.c
*
- * Last changed in libpng 1.6.29 [March 16, 2017]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@@ -40,7 +40,7 @@
/* We'll load 2 bytes, then 1 byte,
* then mask them together, and finally load into SSE.
*/
- const png_uint_16* p01 = p;
+ const png_uint_16* p01 = (png_const_uint_16p)p;
const png_byte* p2 = (const png_byte*)(p01+1);
png_uint_32 v012 = (png_uint_32)(*p01)
@@ -53,12 +53,15 @@
* its bottom two bytes, then its third byte.
*/
png_uint_32 v012;
+ png_uint_16* p01;
+ png_byte* p2;
+
store4(&v012, v);
- png_uint_16* p01 = p;
- png_byte* p2 = (png_byte*)(p01+1);
- *p01 = v012;
- *p2 = v012 >> 16;
+ p01 = (png_uint_16p)p;
+ p2 = (png_byte*)(p01+1);
+ *p01 = (png_uint_16)v012;
+ *p2 = (png_byte)(v012 >> 16);
}
void png_read_filter_row_sub3_sse2(png_row_infop row_info, png_bytep row,
@@ -68,10 +71,13 @@
* There is no pixel to the left of the first pixel. It's encoded directly.
* That works with our main loop if we just say that left pixel was zero.
*/
- png_debug(1, "in png_read_filter_row_sub3_sse2");
+ png_size_t rb;
+
__m128i a, d = _mm_setzero_si128();
- int rb = row_info->rowbytes;
+ png_debug(1, "in png_read_filter_row_sub3_sse2");
+
+ rb = row_info->rowbytes;
while (rb >= 4) {
a = d; d = load4(row);
d = _mm_add_epi8(d, a);
@@ -88,6 +94,7 @@
row += 3;
rb -= 3;
}
+ PNG_UNUSED(prev)
}
void png_read_filter_row_sub4_sse2(png_row_infop row_info, png_bytep row,
@@ -97,11 +104,14 @@
* There is no pixel to the left of the first pixel. It's encoded directly.
* That works with our main loop if we just say that left pixel was zero.
*/
- png_debug(1, "in png_read_filter_row_sub4_sse2");
+ png_size_t rb;
+
__m128i a, d = _mm_setzero_si128();
- int rb = row_info->rowbytes;
- while (rb > 0) {
+ png_debug(1, "in png_read_filter_row_sub4_sse2");
+
+ rb = row_info->rowbytes+4;
+ while (rb > 4) {
a = d; d = load4(row);
d = _mm_add_epi8(d, a);
store4(row, d);
@@ -109,6 +119,7 @@
row += 4;
rb -= 4;
}
+ PNG_UNUSED(prev)
}
void png_read_filter_row_avg3_sse2(png_row_infop row_info, png_bytep row,
@@ -119,18 +130,23 @@
* predicted to be half of the pixel above it. So again, this works
* perfectly with our loop if we make sure a starts at zero.
*/
- png_debug(1, "in png_read_filter_row_avg3_sse2");
+
+ png_size_t rb;
+
const __m128i zero = _mm_setzero_si128();
+
__m128i b;
__m128i a, d = zero;
- int rb = row_info->rowbytes;
+ png_debug(1, "in png_read_filter_row_avg3_sse2");
+ rb = row_info->rowbytes;
while (rb >= 4) {
+ __m128i avg;
b = load4(prev);
a = d; d = load4(row );
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
- __m128i avg = _mm_avg_epu8(a,b);
+ avg = _mm_avg_epu8(a,b);
/* ...but we can fix it up by subtracting off 1 if it rounded up. */
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
_mm_set1_epi8(1)));
@@ -142,11 +158,12 @@
rb -= 3;
}
if (rb > 0) {
+ __m128i avg;
b = load3(prev);
a = d; d = load3(row );
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
- __m128i avg = _mm_avg_epu8(a,b);
+ avg = _mm_avg_epu8(a,b);
/* ...but we can fix it up by subtracting off 1 if it rounded up. */
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
_mm_set1_epi8(1)));
@@ -168,18 +185,21 @@
* predicted to be half of the pixel above it. So again, this works
* perfectly with our loop if we make sure a starts at zero.
*/
- png_debug(1, "in png_read_filter_row_avg4_sse2");
+ png_size_t rb;
const __m128i zero = _mm_setzero_si128();
__m128i b;
__m128i a, d = zero;
- int rb = row_info->rowbytes;
- while (rb > 0) {
+ png_debug(1, "in png_read_filter_row_avg4_sse2");
+
+ rb = row_info->rowbytes+4;
+ while (rb > 4) {
+ __m128i avg;
b = load4(prev);
a = d; d = load4(row );
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
- __m128i avg = _mm_avg_epu8(a,b);
+ avg = _mm_avg_epu8(a,b);
/* ...but we can fix it up by subtracting off 1 if it rounded up. */
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
_mm_set1_epi8(1)));
@@ -237,38 +257,42 @@
* Here we zero b and d, which become c and a respectively at the start of
* the loop.
*/
- png_debug(1, "in png_read_filter_row_paeth3_sse2");
+ png_size_t rb;
const __m128i zero = _mm_setzero_si128();
__m128i c, b = zero,
a, d = zero;
- int rb = row_info->rowbytes;
+ png_debug(1, "in png_read_filter_row_paeth3_sse2");
+
+ rb = row_info->rowbytes;
while (rb >= 4) {
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
* intermediates.
*/
+ __m128i pa,pb,pc,smallest,nearest;
c = b; b = _mm_unpacklo_epi8(load4(prev), zero);
a = d; d = _mm_unpacklo_epi8(load4(row ), zero);
/* (p-a) == (a+b-c - a) == (b-c) */
- __m128i pa = _mm_sub_epi16(b,c);
+
+ pa = _mm_sub_epi16(b,c);
/* (p-b) == (a+b-c - b) == (a-c) */
- __m128i pb = _mm_sub_epi16(a,c);
+ pb = _mm_sub_epi16(a,c);
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
- __m128i pc = _mm_add_epi16(pa,pb);
+ pc = _mm_add_epi16(pa,pb);
pa = abs_i16(pa); /* |p-a| */
pb = abs_i16(pb); /* |p-b| */
pc = abs_i16(pc); /* |p-c| */
- __m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
+ smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
/* Paeth breaks ties favoring a over b over c. */
- __m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
- if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
- c));
+ nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
+ if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
+ c));
/* Note `_epi8`: we need addition to wrap modulo 255. */
d = _mm_add_epi8(d, nearest);
@@ -282,26 +306,27 @@
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
* intermediates.
*/
+ __m128i pa,pb,pc,smallest,nearest;
c = b; b = _mm_unpacklo_epi8(load3(prev), zero);
a = d; d = _mm_unpacklo_epi8(load3(row ), zero);
/* (p-a) == (a+b-c - a) == (b-c) */
- __m128i pa = _mm_sub_epi16(b,c);
+ pa = _mm_sub_epi16(b,c);
/* (p-b) == (a+b-c - b) == (a-c) */
- __m128i pb = _mm_sub_epi16(a,c);
+ pb = _mm_sub_epi16(a,c);
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
- __m128i pc = _mm_add_epi16(pa,pb);
+ pc = _mm_add_epi16(pa,pb);
pa = abs_i16(pa); /* |p-a| */
pb = abs_i16(pb); /* |p-b| */
pc = abs_i16(pc); /* |p-c| */
- __m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
+ smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
/* Paeth breaks ties favoring a over b over c. */
- __m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
+ nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
c));
@@ -331,13 +356,16 @@
* Here we zero b and d, which become c and a respectively at the start of
* the loop.
*/
- png_debug(1, "in png_read_filter_row_paeth4_sse2");
+ png_size_t rb;
const __m128i zero = _mm_setzero_si128();
+ __m128i pa,pb,pc,smallest,nearest;
__m128i c, b = zero,
a, d = zero;
- int rb = row_info->rowbytes;
- while (rb > 0) {
+ png_debug(1, "in png_read_filter_row_paeth4_sse2");
+
+ rb = row_info->rowbytes+4;
+ while (rb > 4) {
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
* intermediates.
*/
@@ -345,22 +373,22 @@
a = d; d = _mm_unpacklo_epi8(load4(row ), zero);
/* (p-a) == (a+b-c - a) == (b-c) */
- __m128i pa = _mm_sub_epi16(b,c);
+ pa = _mm_sub_epi16(b,c);
/* (p-b) == (a+b-c - b) == (a-c) */
- __m128i pb = _mm_sub_epi16(a,c);
+ pb = _mm_sub_epi16(a,c);
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
- __m128i pc = _mm_add_epi16(pa,pb);
+ pc = _mm_add_epi16(pa,pb);
pa = abs_i16(pa); /* |p-a| */
pb = abs_i16(pb); /* |p-b| */
pc = abs_i16(pc); /* |p-c| */
- __m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
+ smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
/* Paeth breaks ties favoring a over b over c. */
- __m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
+ nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
c));
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 6cde89a..b81d2a6 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng
- libpng version 1.6.30 - June 28, 2017
+ libpng version 1.6.31 - July 27, 2017
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
Based on:
- libpng versions 0.97, January 1998, through 1.6.30 - June 28, 2017
+ libpng versions 0.97, January 1998, through 1.6.31 - July 27, 2017
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -1330,6 +1330,11 @@
rowbytes = png_get_rowbytes(png_ptr, info_ptr);
rowbytes - number of bytes needed to hold a row
+ This value, the bit_depth, color_type,
+ and the number of channels can change
+ if you use transforms such as
+ png_set_expand(). See
+ png_read_update_info(), below.
signature = png_get_signature(png_ptr, info_ptr);
@@ -1448,6 +1453,11 @@
the single transparent color for
non-paletted images (PNG_INFO_tRNS)
+ png_get_eXIf(png_ptr, info_ptr, &exif);
+ (PNG_INFO_eXIf)
+
+ exif - Exif profile (array of png_byte)
+
png_get_hIST(png_ptr, info_ptr, &hist);
(PNG_INFO_hIST)
@@ -2493,6 +2503,7 @@
PNG_INFO_gAMA, PNG_INFO_sBIT,
PNG_INFO_cHRM, PNG_INFO_PLTE,
PNG_INFO_tRNS, PNG_INFO_bKGD,
+ PNG_INFO_eXIf,
PNG_INFO_hIST, PNG_INFO_pHYs,
PNG_INFO_oFFs, PNG_INFO_tIME,
PNG_INFO_pCAL, PNG_INFO_sRGB,
@@ -3092,6 +3103,11 @@
single transparent color for
non-paletted images (PNG_INFO_tRNS)
+ png_set_eXIf(png_ptr, info_ptr, exif);
+
+ hist - Exif profile (array of
+ png_byte) (PNG_INFO_eXIf)
+
png_set_hIST(png_ptr, info_ptr, hist);
hist - histogram of palette (array of
@@ -5200,6 +5216,11 @@
enforced, and the palette was always limited to 256 entries. An over-length
PLTE chunk found in an input PNG is silently truncated.
+Starting with libpng-1.6.31, the eXIf chunk is supported. Libpng does not
+attempt to decode the Exif profile; it simply returns a byte array
+containing the profile to the calling application which must do its own
+decoding.
+
XIII. Detecting libpng
The png_get_io_ptr() function has been present since libpng-0.88, has never
@@ -5383,7 +5404,7 @@
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.6.30 are Y2K compliant. It is my belief that earlier
+upward through 1.6.31 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has two year fields. One is a 2-byte unsigned integer
diff --git a/libpng.3 b/libpng.3
index 12eb2e2..345aba1 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "June 28, 2017"
+.TH LIBPNG 3 "July 27, 2017"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.30
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.31
.SH SYNOPSIS
\fB
#include <png.h>\fP
@@ -97,6 +97,8 @@
\fBpng_byte png_get_header_version (png_const_structp \fIpng_ptr\fP\fB);\fP
+\fBpng_uint_32 png_get_eXIf (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fI*exif\fP\fB);\fP
+
\fBpng_uint_32 png_get_hIST (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fI*hist\fP\fB);\fP
\fBpng_uint_32 png_get_iCCP (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_charpp \fP\fIname\fP\fB, int \fP\fI*compression_type\fP\fB, png_bytepp \fP\fIprofile\fP\fB, png_uint_32 \fI*proflen\fP\fB);\fP
@@ -347,6 +349,8 @@
\fBvoid png_set_gray_to_rgb (png_structp \fIpng_ptr\fP\fB);\fP
+\fBvoid png_set_eXIf (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fIexif\fP\fB);\fP
+
\fBvoid png_set_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fIhist\fP\fB);\fP
\fBvoid png_set_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_const_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_const_bytep \fP\fIprofile\fP\fB, png_uint_32 \fIproflen\fP\fB);\fP
@@ -510,7 +514,7 @@
.SH LIBPNG.TXT
libpng-manual.txt - A description on how to use and modify libpng
- libpng version 1.6.30 - June 28, 2017
+ libpng version 1.6.31 - July 27, 2017
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -521,7 +525,7 @@
Based on:
- libpng versions 0.97, January 1998, through 1.6.30 - June 28, 2017
+ libpng versions 0.97, January 1998, through 1.6.31 - July 27, 2017
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -1840,6 +1844,11 @@
rowbytes = png_get_rowbytes(png_ptr, info_ptr);
rowbytes - number of bytes needed to hold a row
+ This value, the bit_depth, color_type,
+ and the number of channels can change
+ if you use transforms such as
+ png_set_expand(). See
+ png_read_update_info(), below.
signature = png_get_signature(png_ptr, info_ptr);
@@ -1958,6 +1967,11 @@
the single transparent color for
non-paletted images (PNG_INFO_tRNS)
+ png_get_eXIf(png_ptr, info_ptr, &exif);
+ (PNG_INFO_eXIf)
+
+ exif - Exif profile (array of png_byte)
+
png_get_hIST(png_ptr, info_ptr, &hist);
(PNG_INFO_hIST)
@@ -3003,6 +3017,7 @@
PNG_INFO_gAMA, PNG_INFO_sBIT,
PNG_INFO_cHRM, PNG_INFO_PLTE,
PNG_INFO_tRNS, PNG_INFO_bKGD,
+ PNG_INFO_eXIf,
PNG_INFO_hIST, PNG_INFO_pHYs,
PNG_INFO_oFFs, PNG_INFO_tIME,
PNG_INFO_pCAL, PNG_INFO_sRGB,
@@ -3602,6 +3617,11 @@
single transparent color for
non-paletted images (PNG_INFO_tRNS)
+ png_set_eXIf(png_ptr, info_ptr, exif);
+
+ hist - Exif profile (array of
+ png_byte) (PNG_INFO_eXIf)
+
png_set_hIST(png_ptr, info_ptr, hist);
hist - histogram of palette (array of
@@ -5710,6 +5730,11 @@
enforced, and the palette was always limited to 256 entries. An over-length
PLTE chunk found in an input PNG is silently truncated.
+Starting with libpng-1.6.31, the eXIf chunk is supported. Libpng does not
+attempt to decode the Exif profile; it simply returns a byte array
+containing the profile to the calling application which must do its own
+decoding.
+
.SH XIII. Detecting libpng
The png_get_io_ptr() function has been present since libpng-0.88, has never
@@ -5893,7 +5918,7 @@
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.6.30 are Y2K compliant. It is my belief that earlier
+upward through 1.6.31 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has two year fields. One is a 2-byte unsigned integer
@@ -5995,7 +6020,7 @@
...
1.5.28 15 10528 15.so.15.28[.0]
...
- 1.6.30 16 10630 16.so.16.30[.0]
+ 1.6.31 16 10631 16.so.16.31[.0]
Henceforth the source version will match the shared-library minor
and patch numbers; the shared-library major version number will be
@@ -6051,7 +6076,7 @@
Thanks to Frank J. T. Wojcik for helping with the documentation.
-Libpng version 1.6.30 - June 28, 2017:
+Libpng version 1.6.31 - July 27, 2017:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@@ -6076,7 +6101,7 @@
This code is released under the libpng license.
-libpng versions 1.0.7, July 1, 2000 through 1.6.30, June 28, 2017 are
+libpng versions 1.0.7, July 1, 2000 through 1.6.31, July 27, 2017 are
Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
derived from libpng-1.0.6, and are distributed according to the same
disclaimer and license as libpng-1.0.6 with the following individuals
@@ -6204,7 +6229,7 @@
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
-June 28, 2017
+July 27, 2017
.\" end of man page
diff --git a/libpng.pc.in b/libpng.pc.in
index 3e7e2c5..9708e9a 100644
--- a/libpng.pc.in
+++ b/libpng.pc.in
@@ -6,6 +6,7 @@
Name: libpng
Description: Loads and saves PNG files
Version: @PNGLIB_VERSION@
+Requires: zlib
Libs: -L${libdir} -lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
Libs.private: @LIBS@
Cflags: -I${includedir}
diff --git a/libpngpf.3 b/libpngpf.3
index c7ae9ed..70992ab 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
.TH LIBPNGPF 3 "April 1, 2017"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.30
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.31
(private functions)
.SH SYNOPSIS
\fB\fB#include \fI\fI"pngpriv.h"
diff --git a/png.c b/png.c
index 40688be..ae5e1d9 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
- * Last changed in libpng 1.6.30 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -14,7 +14,27 @@
#include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_30 Your_png_h_is_not_version_1_6_30;
+typedef png_libpng_version_1_6_31 Your_png_h_is_not_version_1_6_31;
+
+#ifdef __GNUC__
+/* The version tests may need to be added to, but the problem warning has
+ * consistently been fixed in GCC versions which obtain wide-spread release.
+ * The problem is that many versions of GCC rearrange comparison expressions in
+ * the optimizer in such a way that the results of the comparison will change
+ * if signed integer overflow occurs. Such comparisons are not permitted in
+ * ANSI C90, however GCC isn't clever enough to work out that that do not occur
+ * below in png_ascii_from_fp and png_muldiv, so it produces a warning with
+ * -Wextra. Unfortunately this is highly dependent on the optimizer and the
+ * machine architecture so the warning comes and goes unpredictably and is
+ * impossible to "fix", even were that a good idea.
+ */
+#if __GNUC__ == 7 && __GNUC_MINOR__ == 1
+#define GCC_STRICT_OVERFLOW 1
+#endif /* GNU 7.1.x */
+#endif /* GNU */
+#ifndef GCC_STRICT_OVERFLOW
+#define GCC_STRICT_OVERFLOW 0
+#endif
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
@@ -595,6 +615,16 @@
}
#endif
+#ifdef PNG_eXIf_SUPPORTED
+ /* Free any eXIf entry */
+ if (((mask & PNG_FREE_EXIF) & info_ptr->free_me) != 0)
+ {
+ png_free(png_ptr, info_ptr->exif);
+ info_ptr->exif = NULL;
+ info_ptr->valid &= ~PNG_INFO_eXIf;
+ }
+#endif
+
#ifdef PNG_hIST_SUPPORTED
/* Free any hIST entry */
if (((mask & PNG_FREE_HIST) & info_ptr->free_me) != 0)
@@ -776,14 +806,14 @@
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
- "libpng version 1.6.30 - June 28, 2017" PNG_STRING_NEWLINE \
+ "libpng version 1.6.31 - July 27, 2017" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson" \
PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE;
# else
- return "libpng version 1.6.30 - June 28, 2017\
+ return "libpng version 1.6.31 - July 27, 2017\
Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -2857,6 +2887,14 @@
/* Function to format a floating point value in ASCII with a given
* precision.
*/
+#if GCC_STRICT_OVERFLOW
+#pragma GCC diagnostic push
+/* The problem arises below with exp_b10, which can never overflow because it
+ * comes, originally, from frexp and is therefore limited to a range which is
+ * typically +/-710 (log2(DBL_MAX)/log2(DBL_MIN)).
+ */
+#pragma GCC diagnostic warning "-Wstrict-overflow=2"
+#endif /* GCC_STRICT_OVERFLOW */
void /* PRIVATE */
png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
double fp, unsigned int precision)
@@ -2946,7 +2984,7 @@
*/
if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */
{
- czero = (unsigned int)(-exp_b10); /* PLUS 2 digits: TOTAL 3 */
+ czero = 0U-exp_b10; /* PLUS 2 digits: TOTAL 3 */
exp_b10 = 0; /* Dot added below before first output. */
}
else
@@ -3087,7 +3125,7 @@
/* Check for an exponent, if we don't need one we are
* done and just need to terminate the string. At
- * this point exp_b10==(-1) is effectively if flag - it got
+ * this point exp_b10==(-1) is effectively a flag - it got
* to '-1' because of the decrement after outputting
* the decimal point above (the exponent required is
* *not* -1!)
@@ -3101,7 +3139,7 @@
* zeros were *not* output, so this doesn't increase
* the output count.
*/
- while (--exp_b10 >= 0) *ascii++ = 48;
+ while (exp_b10-- > 0) *ascii++ = 48;
*ascii = 0;
@@ -3131,11 +3169,11 @@
if (exp_b10 < 0)
{
*ascii++ = 45; --size; /* '-': PLUS 1 TOTAL 3+precision */
- uexp_b10 = (unsigned int)(-exp_b10);
+ uexp_b10 = 0U-exp_b10;
}
else
- uexp_b10 = (unsigned int)exp_b10;
+ uexp_b10 = 0U+exp_b10;
cdigits = 0;
@@ -3178,6 +3216,9 @@
/* Here on buffer too small. */
png_error(png_ptr, "ASCII conversion buffer too small");
}
+#if GCC_STRICT_OVERFLOW
+#pragma GCC diagnostic pop
+#endif /* GCC_STRICT_OVERFLOW */
# endif /* FLOATING_POINT */
@@ -3291,6 +3332,15 @@
* the nearest .00001). Overflow and divide by zero are signalled in
* the result, a boolean - true on success, false on overflow.
*/
+#if GCC_STRICT_OVERFLOW /* from above */
+/* It is not obvious which comparison below gets optimized in such a way that
+ * signed overflow would change the result; looking through the code does not
+ * reveal any tests which have the form GCC complains about, so presumably the
+ * optimizer is moving an add or subtract into the 'if' somewhere.
+ */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic warning "-Wstrict-overflow=2"
+#endif /* GCC_STRICT_OVERFLOW */
int
png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
png_int_32 divisor)
@@ -3405,6 +3455,9 @@
return 0;
}
+#if GCC_STRICT_OVERFLOW
+#pragma GCC diagnostic pop
+#endif /* GCC_STRICT_OVERFLOW */
#endif /* READ_GAMMA || INCH_CONVERSIONS */
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
diff --git a/png.h b/png.h
index c2c4fdf..4321416 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
- * libpng version 1.6.30, June 28, 2017
+ * libpng version 1.6.31, July 27, 2017
*
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
- * libpng versions 0.97, January 1998, through 1.6.30, June 28, 2017:
+ * libpng versions 0.97, January 1998, through 1.6.31, July 27, 2017:
* Glenn Randers-Pehrson.
* See also "Contributing Authors", below.
*/
@@ -25,7 +25,7 @@
*
* This code is released under the libpng license.
*
- * libpng versions 1.0.7, July 1, 2000 through 1.6.30, June 28, 2017 are
+ * libpng versions 1.0.7, July 1, 2000 through 1.6.31, July 27, 2017 are
* Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
* derived from libpng-1.0.6, and are distributed according to the same
* disclaimer and license as libpng-1.0.6 with the following individuals
@@ -213,7 +213,7 @@
* ...
* 1.5.28 15 10527 15.so.15.28[.0]
* ...
- * 1.6.30 16 10630 16.so.16.30[.0]
+ * 1.6.31 16 10631 16.so.16.31[.0]
*
* Henceforth the source version will match the shared-library major
* and minor numbers; the shared-library major version number will be
@@ -241,13 +241,13 @@
* Y2K compliance in libpng:
* =========================
*
- * June 28, 2017
+ * July 27, 2017
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
- * upward through 1.6.30 are Y2K compliant. It is my belief that
+ * upward through 1.6.31 are Y2K compliant. It is my belief that
* earlier versions were also Y2K compliant.
*
* Libpng only has two year fields. One is a 2-byte unsigned integer
@@ -309,8 +309,8 @@
*/
/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.30"
-#define PNG_HEADER_VERSION_STRING " libpng version 1.6.30 - June 28, 2017\n"
+#define PNG_LIBPNG_VER_STRING "1.6.31"
+#define PNG_HEADER_VERSION_STRING " libpng version 1.6.31 - July 27, 2017\n"
#define PNG_LIBPNG_VER_SONUM 16
#define PNG_LIBPNG_VER_DLLNUM 16
@@ -318,7 +318,7 @@
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 6
-#define PNG_LIBPNG_VER_RELEASE 30
+#define PNG_LIBPNG_VER_RELEASE 31
/* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero:
@@ -349,7 +349,7 @@
* version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
*/
-#define PNG_LIBPNG_VER 10630 /* 1.6.30 */
+#define PNG_LIBPNG_VER 10631 /* 1.6.31 */
/* Library configuration: these options cannot be changed after
* the library has been built.
@@ -459,7 +459,7 @@
/* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number.
*/
-typedef char* png_libpng_version_1_6_30;
+typedef char* png_libpng_version_1_6_31;
/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info.
*
@@ -776,6 +776,7 @@
#define PNG_INFO_sPLT 0x2000U /* ESR, 1.0.6 */
#define PNG_INFO_sCAL 0x4000U /* ESR, 1.0.6 */
#define PNG_INFO_IDAT 0x8000U /* ESR, 1.0.6 */
+#define PNG_INFO_eXIf 0x10000U /* GR-P, 1.6.31 */
/* This is used for the transformation routines, as some of them
* change these values for the row. It also should enable using
@@ -1788,7 +1789,8 @@
#define PNG_FREE_PLTE 0x1000U
#define PNG_FREE_TRNS 0x2000U
#define PNG_FREE_TEXT 0x4000U
-#define PNG_FREE_ALL 0x7fffU
+#define PNG_FREE_EXIF 0x8000U /* Added at libpng-1.6.31 */
+#define PNG_FREE_ALL 0xffffU
#define PNG_FREE_MUL 0x4220U /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
#ifdef PNG_USER_MEM_SUPPORTED
@@ -2007,6 +2009,13 @@
png_fixed_point int_blue_Z))
#endif
+#ifdef PNG_eXIf_SUPPORTED
+PNG_EXPORT(246, png_uint_32, png_get_eXIf, (png_const_structrp png_ptr,
+ png_inforp info_ptr, png_bytep *exif));
+PNG_EXPORT(247, void, png_set_eXIf, (png_const_structrp png_ptr,
+ png_inforp info_ptr, const png_bytep exif));
+#endif
+
#ifdef PNG_gAMA_SUPPORTED
PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr,
png_const_inforp info_ptr, double *file_gamma))
@@ -2025,9 +2034,6 @@
#ifdef PNG_hIST_SUPPORTED
PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr,
png_inforp info_ptr, png_uint_16p *hist));
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr,
png_inforp info_ptr, png_const_uint_16p hist));
#endif
@@ -3253,7 +3259,7 @@
* one to use is one more than this.)
*/
#ifdef PNG_EXPORT_LAST_ORDINAL
- PNG_EXPORT_LAST_ORDINAL(245);
+ PNG_EXPORT_LAST_ORDINAL(247);
#endif
#ifdef __cplusplus
diff --git a/pngconf.h b/pngconf.h
index f64592a..af6e80c 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng
*
- * libpng version 1.6.30, June 28, 2017
+ * libpng version 1.6.31, July 27, 2017
*
* Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngerror.c b/pngerror.c
index 00d76f7..ad48bfb 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,8 +1,8 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
- * Last changed in libpng 1.6.26 [October 20, 2016]
- * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.31 [July 27, 2017]
+ * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -163,7 +163,7 @@
case PNG_NUMBER_FORMAT_02u:
/* Expects at least 2 digits. */
mincount = 2;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case PNG_NUMBER_FORMAT_u:
*--end = digits[number % 10];
@@ -173,7 +173,7 @@
case PNG_NUMBER_FORMAT_02x:
/* This format expects at least two digits */
mincount = 2;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case PNG_NUMBER_FORMAT_x:
*--end = digits[number & 0xf];
diff --git a/pngget.c b/pngget.c
index 141c393..ace9e63 100644
--- a/pngget.c
+++ b/pngget.c
@@ -773,6 +773,24 @@
}
#endif
+#ifdef PNG_eXIf_SUPPORTED
+png_uint_32 PNGAPI
+png_get_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
+ png_bytep *exif)
+{
+ png_debug1(1, "in %s retrieval function", "eXIf");
+
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_eXIf) != 0 && exif != NULL)
+ {
+ *exif = info_ptr->exif;
+ return (PNG_INFO_eXIf);
+ }
+
+ return (0);
+}
+#endif
+
#ifdef PNG_hIST_SUPPORTED
png_uint_32 PNGAPI
png_get_hIST(png_const_structrp png_ptr, png_inforp info_ptr,
diff --git a/pnginfo.h b/pnginfo.h
index 361ed8b..6e6d46a 100644
--- a/pnginfo.h
+++ b/pnginfo.h
@@ -185,6 +185,11 @@
png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
#endif
+#ifdef PNG_eXIf_SUPPORTED
+ int num_exif;
+ png_bytep exif;
+#endif
+
#ifdef PNG_hIST_SUPPORTED
/* The hIST chunk contains the relative frequency or importance of the
* various palette entries, so that a viewer can intelligently select a
diff --git a/pngpriv.h b/pngpriv.h
index a062a8d..ef45ab7 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1,7 +1,7 @@
/* pngpriv.h - private declarations for use inside libpng
*
- * Last changed in libpng 1.6.30 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -35,7 +35,9 @@
* Windows/Visual Studio) there is no effect; the OS specific tests below are
* still required (as of 2011-05-02.)
*/
-#define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
+#ifndef _POSIX_SOURCE
+# define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
+#endif
#ifndef PNG_VERSION_INFO_ONLY
/* Standard library headers not required by png.h: */
@@ -452,6 +454,21 @@
# define png_fixed_error(s1,s2) png_err(s1)
#endif
+/* Some fixed point APIs are still required even if not exported because
+ * they get used by the corresponding floating point APIs. This magic
+ * deals with this:
+ */
+#ifdef PNG_FIXED_POINT_SUPPORTED
+# define PNGFAPI PNGAPI
+#else
+# define PNGFAPI /* PRIVATE */
+#endif
+
+#ifndef PNG_VERSION_INFO_ONLY
+/* Other defines specific to compilers can go here. Try to keep
+ * them inside an appropriate ifdef/endif pair for portability.
+ */
+
/* C allows up-casts from (void*) to any pointer and (const void*) to any
* pointer to a const object. C++ regards this as a type error and requires an
* explicit, static, cast and provides the static_cast<> rune to ensure that
@@ -480,20 +497,6 @@
# define png_aligncastconst(type, value) ((const void*)(value))
#endif /* __cplusplus */
-/* Some fixed point APIs are still required even if not exported because
- * they get used by the corresponding floating point APIs. This magic
- * deals with this:
- */
-#ifdef PNG_FIXED_POINT_SUPPORTED
-# define PNGFAPI PNGAPI
-#else
-# define PNGFAPI /* PRIVATE */
-#endif
-
-#ifndef PNG_VERSION_INFO_ONLY
-/* Other defines specific to compilers can go here. Try to keep
- * them inside an appropriate ifdef/endif pair for portability.
- */
#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\
defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
/* png.c requires the following ANSI-C constants if the conversion of
@@ -839,6 +842,7 @@
#define png_PLTE PNG_U32( 80, 76, 84, 69)
#define png_bKGD PNG_U32( 98, 75, 71, 68)
#define png_cHRM PNG_U32( 99, 72, 82, 77)
+#define png_eXIf PNG_U32(101, 88, 73, 102) /* registered July 2017 */
#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */
#define png_gAMA PNG_U32(103, 65, 77, 65)
#define png_gIFg PNG_U32(103, 73, 70, 103)
@@ -1438,6 +1442,11 @@
png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
#endif
+#ifdef PNG_READ_eXIf_SUPPORTED
+PNG_INTERNAL_FUNCTION(void,png_handle_eXIf,(png_structrp png_ptr,
+ png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+#endif
+
#ifdef PNG_READ_gAMA_SUPPORTED
PNG_INTERNAL_FUNCTION(void,png_handle_gAMA,(png_structrp png_ptr,
png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
diff --git a/pngread.c b/pngread.c
index 106a805..331ce12 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,8 +1,8 @@
/* pngread.c - read a PNG file
*
- * Last changed in libpng 1.6.26 [October 20, 2016]
- * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.31 [July 27, 2017]
+ * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -1883,7 +1883,7 @@
{
case 4:
entry[afirst ? 0 : 3] = (png_uint_16)alpha;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case 3:
if (alpha < 65535)
@@ -1905,7 +1905,7 @@
case 2:
entry[1 ^ afirst] = (png_uint_16)alpha;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case 1:
if (alpha < 65535)
@@ -1934,6 +1934,7 @@
{
case 4:
entry[afirst ? 0 : 3] = (png_byte)alpha;
+ /* FALLTHROUGH */
case 3:
entry[afirst + (2 ^ bgr)] = (png_byte)blue;
entry[afirst + 1] = (png_byte)green;
@@ -1942,6 +1943,7 @@
case 2:
entry[1 ^ afirst] = (png_byte)alpha;
+ /* FALLTHROUGH */
case 1:
entry[afirst] = (png_byte)green;
break;
@@ -2861,7 +2863,7 @@
case P_sRGB:
/* Change to 8-bit sRGB */
png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, PNG_GAMMA_sRGB);
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case P_FILE:
if (png_ptr->bit_depth > 8)
@@ -3179,8 +3181,7 @@
image->colormap_entries == 244 /* 216 + 1 + 27 */)
break;
- /* goto bad_output; */
- /* FALL THROUGH */
+ goto bad_output;
default:
bad_output:
diff --git a/pngrtran.c b/pngrtran.c
index 3886833..9a30ddf 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
- * Last changed in libpng 1.6.30 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -49,6 +49,7 @@
case PNG_CRC_WARN_DISCARD: /* Not a valid action for critical data */
png_warning(png_ptr,
"Can't discard critical data on CRC error");
+ /* FALLTHROUGH */
case PNG_CRC_ERROR_QUIT: /* Error/quit */
case PNG_CRC_DEFAULT:
@@ -1253,7 +1254,7 @@
default:
case 8:
- /* FALL THROUGH (Already 8 bits) */
+ /* FALLTHROUGH */ /* (Already 8 bits) */
case 16:
/* Already a full 16 bits */
diff --git a/pngrutil.c b/pngrutil.c
index f60545b..7fe5cd1 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
- * Last changed in libpng 1.6.30 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -2009,6 +2009,44 @@
}
#endif
+#ifdef PNG_READ_eXIf_SUPPORTED
+void /* PRIVATE */
+png_handle_eXIf(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
+{
+ unsigned int i;
+ png_bytep eXIf_buf;
+
+ png_debug(1, "in png_handle_eXIf");
+
+ if ((png_ptr->mode & PNG_HAVE_IHDR) == 0)
+ png_chunk_error(png_ptr, "missing IHDR");
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_eXIf) != 0)
+ {
+ png_crc_finish(png_ptr, length);
+ png_chunk_benign_error(png_ptr, "duplicate");
+ return;
+ }
+
+ eXIf_buf = png_voidcast(png_bytep,
+ png_malloc_warn(png_ptr, length));
+
+ for (i = 0; i < length; i++)
+ {
+ png_byte buf[1];
+ png_crc_read(png_ptr, buf, 1);
+ eXIf_buf[i] = buf[0];
+ }
+
+ if (png_crc_finish(png_ptr, 0) != 0)
+ return;
+
+ info_ptr->num_exif = length;
+
+ png_set_eXIf(png_ptr, info_ptr, eXIf_buf);
+}
+#endif
+
#ifdef PNG_READ_hIST_SUPPORTED
void /* PRIVATE */
png_handle_hIST(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
@@ -2978,7 +3016,7 @@
case 2:
png_ptr->user_chunk_cache_max = 1;
png_chunk_benign_error(png_ptr, "no space in chunk cache");
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case 1:
/* NOTE: prior to 1.6.0 this case resulted in an unknown critical
* chunk being skipped, now there will be a hard error below.
@@ -2987,7 +3025,7 @@
default: /* not at limit */
--(png_ptr->user_chunk_cache_max);
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case 0: /* no limit */
# endif /* USER_LIMITS */
/* Here when the limit isn't reached or when limits are compiled
diff --git a/pngset.c b/pngset.c
index fb495ac..9984735 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
- * Last changed in libpng 1.6.30 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.30 [June 28, 2017]
* Copyright (c) 1998-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -134,6 +134,39 @@
#endif /* cHRM */
+#ifdef PNG_eXIf_SUPPORTED
+void PNGAPI
+png_set_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
+ const png_bytep eXIf_buf)
+{
+ int i;
+
+ png_debug1(1, "in %s storage function", "eXIf");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ png_free_data(png_ptr, info_ptr, PNG_FREE_EXIF, 0);
+
+ info_ptr->exif = png_voidcast(png_bytep, png_malloc_warn(png_ptr,
+ info_ptr->num_exif));
+
+ if (info_ptr->exif == NULL)
+ {
+ png_warning(png_ptr, "Insufficient memory for eXIf chunk data");
+
+ return;
+ }
+
+ info_ptr->free_me |= PNG_FREE_EXIF;
+
+ for (i = 0; i < info_ptr->num_exif; i++)
+ info_ptr->exif[i] = eXIf_buf[i];
+
+ info_ptr->valid |= PNG_INFO_eXIf;
+}
+#endif /* eXIf */
+
#ifdef PNG_gAMA_SUPPORTED
void PNGFAPI
png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
diff --git a/pngstruct.h b/pngstruct.h
index 749d7e3..44b79de 100644
--- a/pngstruct.h
+++ b/pngstruct.h
@@ -479,5 +479,8 @@
png_colorspace colorspace;
#endif
#endif
+
+/* New member added in libpng-1.6.31 */
+ int num_exif;
};
#endif /* PNGSTRUCT_H */
diff --git a/pngtest.c b/pngtest.c
index d2938d1..bdd37db 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1192,6 +1192,14 @@
}
}
#endif
+#ifdef PNG_eXIf_SUPPORTED
+ {
+ png_bytep exif;
+
+ if (png_get_eXIf(read_ptr, read_info_ptr, &exif) != 0)
+ png_set_eXIf(write_ptr, write_info_ptr, exif);
+ }
+#endif
#ifdef PNG_hIST_SUPPORTED
{
png_uint_16p hist;
@@ -1530,6 +1538,14 @@
}
}
#endif
+#ifdef PNG_eXIf_SUPPORTED
+ {
+ png_bytep exif;
+
+ if (png_get_eXIf(read_ptr, end_info_ptr, &exif) != 0)
+ png_set_eXIf(write_ptr, write_end_info_ptr, exif);
+ }
+#endif
#ifdef PNG_tIME_SUPPORTED
{
png_timep mod_time;
@@ -2088,4 +2104,4 @@
#endif
/* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_30 Your_png_h_is_not_version_1_6_30;
+typedef png_libpng_version_1_6_31 Your_png_h_is_not_version_1_6_31;
diff --git a/pngtest.png b/pngtest.png
index cb3fef4..66df0c4 100644
--- a/pngtest.png
+++ b/pngtest.png
Binary files differ
diff --git a/pngtrans.c b/pngtrans.c
index 6c8c646..326ac33 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,7 +1,7 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
- * Last changed in libpng 1.6.30 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.30 [June 28, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
diff --git a/pngwrite.c b/pngwrite.c
index 07088ee..70d47c4 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,8 +1,8 @@
/* pngwrite.c - general routines to write a PNG file
*
- * Last changed in libpng 1.6.26 [October 20, 2016]
- * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.31 [July 27, 2017]
+ * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -1007,8 +1007,8 @@
case 5:
case 6:
case 7: png_app_error(png_ptr, "Unknown row filter for method 0");
- /* FALL THROUGH */
#endif /* WRITE_FILTER */
+ /* FALLTHROUGH */
case PNG_FILTER_VALUE_NONE:
png_ptr->do_filter = PNG_FILTER_NONE; break;
@@ -1875,7 +1875,7 @@
tRNS[i] = entry[afirst ? 0 : 3];
if (tRNS[i] < 255)
num_trans = i+1;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case 3:
palette[i].blue = entry[afirst + (2 ^ bgr)];
palette[i].green = entry[afirst + 1];
@@ -1886,7 +1886,7 @@
tRNS[i] = entry[1 ^ afirst];
if (tRNS[i] < 255)
num_trans = i+1;
- /* FALL THROUGH */
+ /* FALLTHROUGH */
case 1:
palette[i].blue = palette[i].red = palette[i].green =
entry[afirst];
diff --git a/pngwutil.c b/pngwutil.c
index dd80058..348bb52 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1473,6 +1473,37 @@
}
#endif
+#ifdef PNG_WRITE_eXIf_SUPPORTED
+/* Write the Exif data */
+void /* PRIVATE */
+png_write_eXIf(png_structrp png_ptr, png_bytep exif, int num_exif)
+{
+ int i;
+ png_byte buf[3];
+
+ png_debug(1, "in png_write_eXIf");
+
+ if (num_exif > (int)png_ptr->num_exif)
+ {
+ png_debug2(3, "num_exif = %d, png_ptr->num_exif = %d", num_exif,
+ png_ptr->num_exif);
+
+ png_warning(png_ptr, "Invalid number of exif bytes specified");
+ return;
+ }
+
+ png_write_chunk_header(png_ptr, png_eXIf, (png_uint_32)(num_exif));
+
+ for (i = 0; i < num_exif; i++)
+ {
+ buf[i] = exif[i];
+ png_write_chunk_data(png_ptr, buf, (png_size_t)1);
+ }
+
+ png_write_chunk_end(png_ptr);
+}
+#endif
+
#ifdef PNG_WRITE_hIST_SUPPORTED
/* Write the histogram */
void /* PRIVATE */
diff --git a/projects/vstudio/README.txt b/projects/vstudio/README.txt
index 1856022..38c159c 100644
--- a/projects/vstudio/README.txt
+++ b/projects/vstudio/README.txt
@@ -1,7 +1,7 @@
VisualStudio instructions
-libpng version 1.6.30 - June 28, 2017
+libpng version 1.6.31 - July 27, 2017
Copyright (c) 2010,2013,2015 Glenn Randers-Pehrson
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index df9c4d6..f3fa101 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
<!--
* zlib.props - location of zlib source
*
- * libpng version 1.6.30 - June 28, 2017
+ * libpng version 1.6.31 - July 27, 2017
*
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
*
diff --git a/scripts/README.txt b/scripts/README.txt
index 24b1228..76e70e6 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,9 +1,11 @@
-Makefiles for libpng version 1.6.30 - June 28, 2017
+Makefiles for libpng version 1.6.31 - July 27, 2017
pnglibconf.h.prebuilt => Stores configuration settings
makefile.linux => Linux/ELF makefile
- (gcc, creates libpng16.so.16.1.6.30)
+ (gcc, creates libpng16.so.16.1.6.31)
+ makefile.linux-opt=> Linux/ELF makefile with hardware optimizations on
+ (gcc, creates libpng16.so.16.1.6.31)
makefile.gcc => Generic makefile (gcc, creates static libpng.a)
makefile.knr => Archaic UNIX Makefile that converts files with
ansi2knr (Requires ansi2knr.c from
@@ -33,12 +35,12 @@
makefile.os2 => OS/2 Makefile (gcc and emx, requires libpng.def)
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
makefile.sggcc => Silicon Graphics (gcc,
- creates libpng16.so.16.1.6.30)
+ creates libpng16.so.16.1.6.31)
makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib)
makefile.solaris => Solaris 2.X makefile (gcc,
- creates libpng16.so.16.1.6.30)
+ creates libpng16.so.16.1.6.31)
makefile.so9 => Solaris 9 makefile (gcc,
- creates libpng16.so.16.1.6.30)
+ creates libpng16.so.16.1.6.31)
makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
makefile.sunos => Sun makefile
makefile.32sunu => Sun Ultra 32-bit makefile
diff --git a/scripts/def.c b/scripts/def.c
index f474f1f..aedaec8 100644
--- a/scripts/def.c
+++ b/scripts/def.c
@@ -21,7 +21,7 @@
PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE"
PNG_DFN ""
PNG_DFN "EXPORTS"
-PNG_DFN ";Version 1.6.30"
+PNG_DFN ";Version 1.6.31"
#define PNG_EXPORTA(ordinal, type, name, args, attributes)\
PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index 4efbab7..9e7d952 100644
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
# Modeled after libxml-config.
-version=1.6.30
+version=1.6.31
prefix=""
libdir=""
libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index 08365a4..8210520 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
Name: libpng
Description: Loads and saves PNG files
-Version: 1.6.30
+Version: 1.6.31
Libs: -L${libdir} -lpng16
Cflags: -I${includedir}
diff --git a/scripts/makefile.cegcc b/scripts/makefile.cegcc
index 6043845..ef17dab 100644
--- a/scripts/makefile.cegcc
+++ b/scripts/makefile.cegcc
@@ -23,7 +23,7 @@
VERMAJ = 1
VERMIN = 6
-VERMIC = 30
+VERMIC = 31
VER = $(VERMAJ).$(VERMIN).$(VERMIC)
NAME = libpng
PACKAGE = $(NAME)-$(VER)
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index f3f9550..8bb5ba7 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -10,7 +10,7 @@
# Library name:
LIBNAME = libpng16
PNGMAJ = 16
-RELEASE = 30
+RELEASE = 31
# Shared library names:
LIBSO=$(LIBNAME).so
diff --git a/scripts/makefile.linux-opt b/scripts/makefile.linux-opt
new file mode 100644
index 0000000..f93c545
--- /dev/null
+++ b/scripts/makefile.linux-opt
@@ -0,0 +1,265 @@
+# makefile for libpng.a and libpng16.so on Linux ELF with gcc
+# Copyright (C) 1998,1999,2002,2006,2008,2010-2014,2017 Greg Roelofs and
+# Glenn Randers-Pehrson
+# Copyright (C) 1996,1997 Andreas Dilger
+#
+# This code is released under the libpng license.
+# For conditions of distribution and use, see the disclaimer
+# and license in png.h
+
+# Library name:
+LIBNAME = libpng16
+PNGMAJ = 16
+RELEASE = 31
+
+# Shared library names:
+LIBSO=$(LIBNAME).so
+LIBSOMAJ=$(LIBNAME).so.$(PNGMAJ)
+LIBSOREL=$(LIBSOMAJ).$(RELEASE)
+OLDSO=libpng.so
+
+# Utilities:
+AR_RC=ar rc
+CC=gcc
+MKDIR_P=mkdir -p
+LN_SF=ln -sf
+RANLIB=ranlib
+CP=cp
+RM_F=/bin/rm -f
+
+# where "make install" puts libpng16.a, libpng16.so*,
+# libpng16/png.h, libpng16/pngconf.h, and libpng16/pnglibconf.h
+# Prefix must be a full pathname.
+prefix=/usr/local
+exec_prefix=$(prefix)
+
+# Where the zlib library and include files are located.
+#ZLIBLIB=/usr/local/lib
+#ZLIBINC=/usr/local/include
+ZLIBLIB=../zlib
+ZLIBINC=../zlib
+
+ALIGN=
+# for i386:
+#ALIGN=-malign-loops=2 -malign-functions=2
+
+#WARNMORE=-Wwrite-strings -Wpointer-arith \
+# -Wmissing-declarations -Wtraditional -Wcast-align \
+# -Wstrict-prototypes -Wmissing-prototypes
+
+# for pgcc version 2.95.1, -O3 is buggy; don't use it.
+
+CPPFLAGS=-I$(ZLIBINC)
+CPPFLAGS += -DPNG_ARM_NEON
+CPPFLAGS += -DPNG_MIPS_MSA
+CPPFLAGS += -DPNG_INTEL_SSE
+CPPFLAGS += -DPNG_POWERPC_VSX
+CPPFLAGS+=-ansi -pedantic -Wextra -Wall -Wshadow -Wno-sign-conversion
+CPPFLAGS+=-W -Wall -Wconversion $(ALIGN)
+# CPPFLAGS+=$(WARNMORE)
+CFLAGS= -O3 -funroll-loops
+
+LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng16 -lz -lm
+LDFLAGS_A=-L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) libpng.a -lz -lm
+
+INCPATH=$(prefix)/include
+LIBPATH=$(exec_prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(exec_prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location. Example:
+#
+# make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
+
+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
+OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
+ pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
+ pngwtran.o pngmem.o pngerror.o pngpread.o \
+ arm/arm_init.o arm/filter_neon_intrinsics.o \
+ mips/mips_init.o mips/filter_msa_intrinsics.o \
+ intel/intel_init.o intel/filter_sse2_intrinsics.o\
+ powerpc/powerpc_init.o powerpc/filter_vsx_intrinsics.o
+
+OBJSDLL = $(OBJS:.o=.pic.o)
+
+.SUFFIXES: .c .o .pic.o
+
+.c.o:
+ $(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
+
+.c.pic.o:
+ $(CC) -c $(CPPFLAGS) $(CFLAGS) -fPIC -o $@ $*.c
+
+all: libpng.a $(LIBSO) pngtest pngtest-static libpng.pc libpng-config
+
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+ $(CP) $(PNGLIBCONF_H_PREBUILT) $@
+
+libpng.a: $(OBJS)
+ $(AR_RC) $@ $(OBJS)
+ $(RANLIB) $@
+
+libpng.pc:
+ cat scripts/libpng.pc.in | sed -e s!@prefix@!$(prefix)! \
+ -e s!@exec_prefix@!$(exec_prefix)! \
+ -e s!@libdir@!$(LIBPATH)! \
+ -e s!@includedir@!$(INCPATH)! \
+ -e s!-lpng16!-lpng16\ -lz\ -lm! > libpng.pc
+
+libpng-config:
+ ( cat scripts/libpng-config-head.in; \
+ echo prefix=\"$(prefix)\"; \
+ echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+ echo L_opts=\"-L$(LIBPATH)\"; \
+ echo R_opts=\"-Wl,-rpath,$(LIBPATH)\"; \
+ echo libs=\"-lpng16 -lz -lm\"; \
+ cat scripts/libpng-config-body.in ) > libpng-config
+ chmod +x libpng-config
+
+$(LIBSO): $(LIBSOMAJ)
+ $(LN_SF) $(LIBSOMAJ) $(LIBSO)
+
+$(LIBSOMAJ): $(OBJSDLL)
+ $(CC) -shared -Wl,-soname,$(LIBSOMAJ) -o $(LIBSOMAJ) $(OBJSDLL)
+
+pngtest: pngtest.o $(LIBSO)
+ $(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
+
+pngtest-static: pngtest.o libpng.a
+ $(CC) -o pngtest-static $(CFLAGS) pngtest.o $(LDFLAGS_A)
+
+test: pngtest pngtest-static
+ @echo ""
+ @echo " Running pngtest dynamically linked with $(LIBSO):"
+ @echo ""
+ ./pngtest
+ @echo ""
+ @echo " Running pngtest statically linked with libpng.a:"
+ @echo ""
+ ./pngtest-static
+
+install-headers: png.h pngconf.h pnglibconf.h
+ -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi
+ -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi
+ cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME)
+ chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h
+ -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h
+ -@$(RM_F) $(DI)/libpng
+ (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+ -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi
+ cp libpng.a $(DL)/$(LIBNAME).a
+ chmod 644 $(DL)/$(LIBNAME).a
+ -@$(RM_F) $(DL)/libpng.a
+ (cd $(DL); $(LN_SF) $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBSOMAJ) libpng.pc
+ -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi
+ -@$(RM_F) $(DL)/$(LIBSO)
+ -@$(RM_F) $(DL)/$(LIBSOREL)
+ -@$(RM_F) $(DL)/$(OLDSO)
+ cp $(LIBSOMAJ) $(DL)/$(LIBSOREL)
+ chmod 755 $(DL)/$(LIBSOREL)
+ (cd $(DL); \
+ $(LN_SF) $(LIBSOREL) $(LIBSO); \
+ $(LN_SF) $(LIBSO) $(OLDSO))
+
+ -@if [ ! -d $(DL)/pkgconfig ]; then $(MKDIR_P) $(DL)/pkgconfig; fi
+ -@$(RM_F) $(DL)/pkgconfig/$(LIBNAME).pc
+ -@$(RM_F) $(DL)/pkgconfig/libpng.pc
+ cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+ chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+ (cd $(DL)/pkgconfig; $(LN_SF) $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+ -@if [ ! -d $(DM) ]; then $(MKDIR_P) $(DM); fi
+ -@if [ ! -d $(DM)/man3 ]; then $(MKDIR_P) $(DM)/man3; fi
+ -@$(RM_F) $(DM)/man3/libpng.3
+ -@$(RM_F) $(DM)/man3/libpngpf.3
+ cp libpng.3 $(DM)/man3
+ cp libpngpf.3 $(DM)/man3
+ -@if [ ! -d $(DM)/man5 ]; then $(MKDIR_P) $(DM)/man5; fi
+ -@$(RM_F) $(DM)/man5/png.5
+ cp png.5 $(DM)/man5
+
+install-config: libpng-config
+ -@if [ ! -d $(DB) ]; then $(MKDIR_P) $(DB); fi
+ -@$(RM_F) $(DB)/libpng-config
+ -@$(RM_F) $(DB)/$(LIBNAME)-config
+ cp libpng-config $(DB)/$(LIBNAME)-config
+ chmod 755 $(DB)/$(LIBNAME)-config
+ (cd $(DB); $(LN_SF) $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location. Use test-dd to test it
+# before then.
+
+test-dd:
+ echo
+ echo Testing installed dynamic shared library in $(DL).
+ $(CC) -I$(DI) $(CPPFLAGS) \
+ `$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \
+ -L$(DL) -L$(ZLIBLIB) -Wl, -rpath,$(DL) -Wl,-rpath,$(ZLIBLIB) \
+ -o pngtestd `$(BINPATH)/$(LIBNAME)-config --ldflags`
+ ./pngtestd pngtest.png
+
+test-installed:
+ $(CC) $(CPPFLAGS) \
+ `$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \
+ -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) \
+ -o pngtesti `$(BINPATH)/$(LIBNAME)-config --ldflags`
+ ./pngtesti pngtest.png
+
+clean:
+ $(RM_F) *.o libpng.a pngtest pngout.png libpng-config \
+ $(LIBSO) $(LIBSOMAJ)* pngtest-static pngtesti \
+ libpng.pc pnglibconf.h
+
+DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
+writelock:
+ chmod a-w *.[ch35] $(DOCS) scripts/*
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+arm/arm_init.o arm/arm_init.o: pngpriv.h
+arm/filter_neon_intrinsics.o arm/filter_neon_intrinsics.pic.o: pngpriv.h
+mips/mips_init.o mips/mips_init.pic.o: pngpriv.h
+mips/filter_msa_intrinsics.o mips/filter_msa_intrinsics.pic.: pngpriv.h
+intel/intel_init.o intel/intel_init.pic.: pngpriv.h
+intel/filter_sse2_intrinsics.o intel/filter_sse2_intrinsics.pic.: pngpriv.h
+powerpc/powerpc_init.o powerpc/powerpc_init.pic.: pngpriv.h
+powerpc/filter_vsx_intrinsics.o powerpc/filter_vsx_intrinsics.pic.: pngpriv.h
+
+pngtest.o: png.h pngconf.h pnglibconf.h
diff --git a/scripts/makefile.msys b/scripts/makefile.msys
index c603673..3056542 100644
--- a/scripts/makefile.msys
+++ b/scripts/makefile.msys
@@ -18,7 +18,7 @@
# Library name:
LIBNAME = libpng16
PNGMAJ = 16
-RELEASE = 30
+RELEASE = 31
# Shared library names:
LIBSO=$(LIBNAME).dll
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 54f7a6e..01d9727 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
LIB= png16
SHLIB_MAJOR= 0
-SHLIB_MINOR= 1.6.30
+SHLIB_MINOR= 1.6.31
SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.netbsd b/scripts/makefile.netbsd
index e296b08..7e39344 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
LIB= png
SHLIB_MAJOR= 16
-SHLIB_MINOR= 1.6.30
+SHLIB_MINOR= 1.6.31
SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index e881933..f3f8105 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
MANDIR= ${PREFIX}/man/cat
SHLIB_MAJOR= 16
-SHLIB_MINOR= 1.6.30
+SHLIB_MINOR= 1.6.31
LIB= png
SRCS= png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/pnglibconf.dfa b/scripts/pnglibconf.dfa
index 4d4e13b..cd7aaaf 100644
--- a/scripts/pnglibconf.dfa
+++ b/scripts/pnglibconf.dfa
@@ -741,6 +741,8 @@
# Ancillary chunks
chunk bKGD
chunk cHRM enables COLORSPACE
+# enable eXIf only after chunk is approved
+chunk eXIf
chunk gAMA enables GAMMA
chunk hIST
chunk iCCP enables COLORSPACE, GAMMA
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index da3d835..9b9bbce 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -1,8 +1,8 @@
-/* libpng 1.6.30 STANDARD API DEFINITION */
+/* libpng 1.6.31 STANDARD API DEFINITION */
/* pnglibconf.h - library build configuration */
-/* Libpng version 1.6.30 - June 28, 2017 */
+/* Libpng version 1.6.31 - July 27, 2017 */
/* Copyright (c) 1998-2017 Glenn Randers-Pehrson */
@@ -84,6 +84,7 @@
#define PNG_READ_USER_TRANSFORM_SUPPORTED
#define PNG_READ_bKGD_SUPPORTED
#define PNG_READ_cHRM_SUPPORTED
+#define PNG_READ_eXIf_SUPPORTED
#define PNG_READ_gAMA_SUPPORTED
#define PNG_READ_hIST_SUPPORTED
#define PNG_READ_iCCP_SUPPORTED
@@ -153,6 +154,7 @@
#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
#define PNG_WRITE_bKGD_SUPPORTED
#define PNG_WRITE_cHRM_SUPPORTED
+#define PNG_WRITE_eXIf_SUPPORTED
#define PNG_WRITE_gAMA_SUPPORTED
#define PNG_WRITE_hIST_SUPPORTED
#define PNG_WRITE_iCCP_SUPPORTED
@@ -170,6 +172,7 @@
#define PNG_WRITE_zTXt_SUPPORTED
#define PNG_bKGD_SUPPORTED
#define PNG_cHRM_SUPPORTED
+#define PNG_eXIf_SUPPORTED
#define PNG_gAMA_SUPPORTED
#define PNG_hIST_SUPPORTED
#define PNG_iCCP_SUPPORTED
diff --git a/scripts/symbols.def b/scripts/symbols.def
index fe90a29..d714cf6 100644
--- a/scripts/symbols.def
+++ b/scripts/symbols.def
@@ -1,4 +1,4 @@
-;Version 1.6.30
+;Version 1.6.31
;--------------------------------------------------------------
; LIBPNG symbol list as a Win32 DEF file
; Contains all the symbols that can be exported from libpng
@@ -250,3 +250,5 @@
png_get_palette_max @243
png_set_option @244
png_image_write_to_memory @245
+ png_get_eXIf @246
+ png_set_eXIf @247
