/png, Library for manipulating PNG images
1.6.7, Package name:
png-1.6.7, Maintainer: wiz
Libpng was written as a companion to the PNG specification, as a
way to reduce the amount of time and effort it takes to support
the PNG file format in application programs. Most users will not
have to modify the library significantly; advanced users may want
to modify it more. The library was coded for both users. All
attempts were made to make it as complete as possible, while
keeping the code easy to understand. Currently, this library
only supports C. Support for other languages is being considered.
Master sites: (Expand) SHA1:
Version history: (Expand)
- (2013-11-15) Updated to version: png-1.6.7
- (2013-10-01) Updated to version: png-1.6.6
- (2013-09-14) Updated to version: png-1.6.5
- (2013-09-12) Updated to version: png-1.6.4
- (2013-07-18) Updated to version: png-1.6.3
- (2013-06-23) Updated to version: png-1.6.2nb1
CVS history: (Expand)
| 2013-11-15 08:42:08 by Matthias Scheler | Files touched by this commit (1) |
Fix download URL on "ftp.fu-berlin.de".
| 2013-11-15 00:09:45 by Thomas Klausner | Files touched by this commit (2) | |
Update to 1.6.7:
Version 1.6.7beta01 [September 30, 2013]
Revised unknown chunk code to correct several bugs in the NO_SAVE_/NO_WRITE
Allow HANDLE_AS_UNKNOWN to work when other options are configured off. Also
fixed the pngminim makefiles to work when $(MAKEFLAGS) contains stuff
which terminates the make options (as by default in recent versions of
Avoid up-cast warnings in pngvalid.c. On ARM the alignment requirements of
png_modifier are greater than that of png_store and as a consequence
compilation of pngvalid.c results in a warning about increased alignment
requirements because of the bare cast to (png_modifier*). The code is safe,
because the pointer is known to point to a stack allocated png_modifier,
but this change avoids the warning.
Fixed default behavior of ARM_NEON_API. If the ARM NEON API option was
compiled without the CHECK option it defaulted to on, not off.
Check user callback behavior in pngunknown.c. Previous versions compiled
if SAVE_UNKNOWN was not available but did nothing since the callback
was never implemented.
Merged pngunknown.c with 1.7 version and back ported 1.7 improvements/fixes
Version 1.6.7beta02 [October 12, 2013]
Made changes for compatibility with automake 1.14:
1) Added the 'compile' program to the list of programs that must be cleaned
2) Added 'subdir-objects' which causes .c files in sub-directories to be
compiled such that the corresponding .o files are also in the
sub-directory. This is because automake 1.14 warns that the
current behavior of compiling to the top level directory may be removed
in the future.
3) Updated dependencies on pnglibconf.h to match the new .o locations and
added all the files in contrib/libtests and contrib/tools that depend
4) Added 'BUILD_SOURCES = pnglibconf.h'; this is the automake recommended
way of handling the dependencies of sources that are machine generated;
unfortunately it only works if the user does 'make all' or 'make check',
so the dependencies (3) are still required.
Cleaned up (char*) casts of zlib messages. The latest version of the Intel C
compiler complains about casting a string literal as (char*), so copied the
treatment of z_const from the library code into pngfix.c
Simplified error message code in pngunknown. The simplification has the
useful side effect of avoiding a bogus warning generated by the latest
version of the Intel C compiler (it objects to
condition ? string-literal : string-literal).
Make autogen.sh work with automake 1.13 as well as 1.14. Do this by always
removing the 1.14 'compile' script but never checking for it.
Version 1.6.7beta03 [October 19, 2013]
Added ARMv8 support (James Yu <james.yu at linaro.org>). Added file
arm/filter_neon_intrinsics.c; enable with -mfpu=neon.
Revised pngvalid to generate size images with as many filters as it can
manage, limited by the number of rows.
Cleaned up ARM NEON compilation handling. The tests are now in pngpriv.h
and detect the broken GCC compilers.
Version 1.6.7beta04 [October 26, 2013]
Allow clang derived from older GCC versions to use ARM intrinsics. This
causes all clang builds that use -mfpu=neon to use the intrinsics code,
not the assembler code. This has only been tested on iOS 7. It may be
necessary to exclude some earlier clang versions but this seems unlikely.
Changed NEON implementation selection mechanism. This allows assembler
or intrinsics to be turned on at compile time during the build by defining
PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). This macro
is undefined by default and the build type is selected in pngpriv.h.
Version 1.6.7rc01 [November 2, 2013]
Version 1.6.7rc02 [November 7, 2013]
Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char
checking macros take an unsigned char argument, not a signed char.
Version 1.6.7 [November 14, 2013]
| 2013-09-30 20:17:03 by Thomas Klausner | Files touched by this commit (2) | |
Update to 1.6.6:
Version 1.6.6 [September 16, 2013]
Removed two stray lines of code from arm/arm_init.c, again.
| 2013-09-14 18:45:48 by Thomas Klausner | Files touched by this commit (2) | |
Update to 1.6.5:
libpng-1.6.5 has been released, to remove two stray lines in arm/arm_init.c
that caused libpng to fail to compile when ARM support is enabled. This
problem was apparently due to a cut-and-paste error of some sort on my part.
| 2013-09-12 15:00:53 by Thomas Klausner | Files touched by this commit (2) | |
Update to 1.6.4:
Changes since the last public release (1.6.3):
Added information about png_set_options() to the manual.
Delay calling png_init_filter_functions() until a row with nonzero filter
Fixed inconsistent conditional compilation of png_chunk_unknown_handling()
prototype, definition, and usage. Made it depend on
| 2013-07-18 08:27:34 by Thomas Klausner | Files touched by this commit (1) | |
PLIST update for png-1.6.3.
| 2013-07-18 08:26:51 by Thomas Klausner | Files touched by this commit (2) | |
Update to 1.6.3:
Changes since the last public release (1.6.2):
Revised stack marking in arm/filter_neon.S and configure.ac.
Ensure that NEON filter stuff is completely disabled when switched 'off'.
Previously the ARM NEON specific files were still built if the option
was switched 'off' as opposed to being explicitly disabled.
Test for 'arm*' not just 'arm' in the host_cpu configure variable.
Rebuilt the configure scripts.
Expanded manual paragraph about writing private chunks, particularly
the need to call png_set_keep_unknown_chunks() when writing them.
Avoid dereferencing NULL pointer possibly returned from
png_create_write_struct() (Andrew Church).
Calculate our own zlib windowBits when decoding rather than trusting the
CMF bytes in the PNG datastream.
Added an option to force maximum window size for inflating, which was
the behavior of libpng15 and earlier.
Added png-fix-itxt and png-fix-too-far-back to the built programs and
removed warnings from the source code and timepng that are revealed as
Detect wrong libpng versions linked to png-fix-too-far-back, which currently
only works with libpng versions that can be made to reliably fail when
the deflate data contains an out-of-window reference. This means only
1.6 and later.
Fixed gnu issues: g++ needs a static_cast, gcc 4.4.7 has a broken warning
message which it is easier to work round than ignore.
Updated contrib/pngminus/pnm2png.c (Paul Stewart):
Check for EOF
Ignore "#" delimited comments in input file to pnm2png.c.
Fixed whitespace handling
Added a call to png_set_packing()
Initialize dimension values so if sscanf fails at least we have known
Attempt to detect configuration issues with png-fix-too-far-back, which
requires both the correct libpng and the correct zlib to function
Check ZLIB_VERNUM for mismatches, enclose #error in quotes
Added information in the documentation about problems with and fixes for
the bad CRC and bad iTXt chunk situations.
Allow contrib/pngminus/pnm2png.c to compile without WRITE_INVERT and
WRITE_PACK supported (writes error message that it can't read P1 or
Improved png-fix-too-far-back usage message, added --suffix option.
Revised contrib/pngminim/*/makefile to generate pnglibconf.h with the
right zlib header files.
Separated CPPFLAGS and CFLAGS in contrib/pngminim/*/makefile
Removed a redundant test in png_set_IHDR().
Added set(CMAKE_CONFIGURATION_TYPES ...) to CMakeLists.txt (Andrew Hundt)
Deleted set(CMAKE_BUILD_TYPE) block from CMakeLists.txt
Enclose the prototypes for the simplified write API in
Make ARM NEON support work at compile time (not just configure time).
This moves the test on __ARM_NEON__ into pngconf.h to avoid issues when
using a compiler that compiles for multiple architectures at one time.
Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from
pnglibconf.h, allowing more of the decisions to be made internally
(pngpriv.h) during the compile. Without this, symbol prefixing is broken
under certain circumstances on ARM platforms. Now only the API parts of
the optimizations ('check' vs 'api') are exposed in the public header files
except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the
decision about whether or not to use the optimizations.
Protect symbol prefixing against CC/CPPFLAGS/CFLAGS useage.
Previous iOS/Xcode fixes for the ARM NEON optimizations moved the test
on __ARM_NEON__ from configure time to compile time. This breaks symbol
prefixing because the definition of the special png_init_filter_functions
call was hidden at configure time if the relevant compiler arguments are
passed in CFLAGS as opposed to CC. This change attempts to avoid all
the confusion that would result by declaring the init function even when
it is not used, so that it will always get prefixed.
Revised libpng.3 so that "doclifter" can process it.
Revised example.c to illustrate use of PNG_DEFAULT_sRGB and
as parameters for png_set_gamma(). These have been available since
Renamed contrib/tools/png-fix-too-far-back.c to pngfix.c and revised it
to check all compressed chunks known to libpng.
Updated documentation to show default behavior of benign errors correctly.
Only compile ARM code when PNG_READ_SUPPORTED is defined.
Fixed undefined behavior in contrib/tools/pngfix.c and added new strip
option. pngfix relied on undefined behavior and even a simple change from
gcc to g++ caused it to fail. The new strip option 'unsafe' has been
implemented and is the default if --max is given. Option names have
been clarified, with --strip=transform now stripping the bKGD chunk,
which was stripped previously with --strip=unused.
Added all documented chunk types to pngpriv.h
Unified pngfix.c source with libpng17.
Revised manual about changes in iTXt chunk handling made in libpng-1.6.0.
Added "/* SAFE */" comments in pngrutil.c and pngrtran.c where warnings
may be erroneously issued by code-checking applications.
| 2013-06-23 07:20:33 by Izumi Tsutsui | Files touched by this commit (2) | |
Add workaround for PR/47798 (png gets SEGV on NetBSD/arm 6.1 due to gcc bug).
- specify "-O2 -fno-ipa-sra" for NetBSD/arm and gcc-4.5.* in hacks.mk
- also bump PKGREVISION for explicit rebuild
"Please commit that" from wiz@.