./graphics/png, Library for manipulating PNG images

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Branch: CURRENT, Version: 1.6.29, Package name: png-1.6.29, 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.

Required to build:

Master sites: (Expand)

SHA1: 7dbe6a5088b938545fc0857c507d4e0cf5d9023e
RMD160: 820a7ad1f2f05e183aa0544de836cd630e03cd64
Filesize: 964.504 KB

Version history: (Expand)

CVS history: (Expand)

   2017-04-24 09:18:59 by Thomas Klausner | Files touched by this commit (1)
Log message:
Add new main master site.
   2017-03-16 16:15:42 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated png to 1.6.29.

Version 1.6.29beta01 [January 12, 2017]
  Readded "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco \ 
  Moved SSE2 optimization code into the main libpng source directory.
    Configure libpng with "configure --enable-intel-sse" or compile
    libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it.
  Simplified conditional compilation in pngvalid.c, for AIX (Michael Felt).

Version 1.6.29beta02 [February 22, 2017]
  Avoid conditional directives that break statements in pngrutil.c (Romero
  The contrib/examples/pngtopng.c recovery code was in the wrong "if"
    branches; the comments were correct.
  Added code for PowerPC VSX optimisation (Vadim Barkov).

Version 1.6.29beta03 [March 1, 2017]
  Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer).
  Change test ZLIB_VERNUM >= 0x1281 to ZLIB_VERNUM >= 0x1290 in pngrutil.c
    because Solaris 11 distributes zlib-1.2.8.f that is older than
  Suppress clang warnings about implicit sign changes in png.c

Version 1.6.29 [March 16, 2017]
  No changes.
   2017-01-19 19:52:30 by Alistair G. Crooks | Files touched by this commit (352)
Log message:
Convert all occurrences (353 by my count) of

	MASTER_SITES= 	site1 \

style continuation lines to be simple repeated


lines. As previewed on tech-pkg. With thanks to rillig for fixing pkglint
   2017-01-05 18:54:44 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated png to 1.6.28.

Version 1.6.28rc01 [January 3, 2017]
  Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna).
  Added option to Cmake build allowing a custom location of zlib to be
    specified in a scenario where libpng is being built as a subproject
    alongside zlib by another project (Sam Serrels).
  Changed png_ptr->options from a png_byte to png_uint_32, to accomodate
    up to 16 options.

Version 1.6.28rc02 [January 4, 2017]
  Added "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco \ 
  Moved SSE2 optimization code into the main libpng source directory.
    Configure libpng with "configure --enable-intel-sse" or compile
    libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it.

Version 1.6.28rc03 [January 4, 2017]
  Backed out the SSE optimization and last CMakeLists.txt to allow time for QA.

Version 1.6.28 [January 5, 2017]
  No changes.
   2016-12-29 19:41:03 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated png to 1.6.27, security fix release.

Version 1.6.27beta01 [November 2, 2016]
  Restrict the new ADLER32-skipping to IDAT chunks.  It broke iCCP chunk
    handling: an erroneous iCCP chunk would throw a png_error and reject the
    entire PNG image instead of rejecting just the iCCP chunk with a warning,
    if built with zlib-

Version 1.6.27rc01 [December 27, 2016]
  Control ADLER32 checking with new PNG_IGNORE_ADLER32 option.
  Removed the use of a macro containing the pre-processor 'defined'
    operator.  It is unclear whether this is valid; a macro that
    "generates" 'defined' is not permitted, but the use of the word
    "generates" within the C90 standard seems to imply more than simple
    substitution of an expression itself containing a well-formed defined
  Added ARM support to CMakeLists.txt (Andreas Franek).

Version 1.6.27 [December 29, 2016]
  Fixed a potential null pointer dereference in png_set_text_2() (bug report
    and patch by Patrick Keshishian).
   2016-10-20 13:36:36 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated png to 1.6.26.

Version 1.6.26beta01 [September 26, 2016]
  Fixed handling zero length IDAT in pngfix (bug report by Agostino Sarubbo,
    bugfix by John Bowler).
  Do not issue a png_error() on read in png_set_pCAL() because png_handle_pCAL
    has allocated memory that libpng needs to free.
  Conditionally compile png_set_benign_errors() in pngread.c and pngtest.c
  Issue a png_benign_error instead of a png_error on ADLER32 mismatch
    while decoding compressed data chunks.
  Changed PNG_ZLIB_VERNUM to ZLIB_VERNUM in pngpriv.h, pngstruct.h, and
  If CRC handling of critical chunks has been set to PNG_CRC_QUIET_USE,
    ignore the ADLER32 checksum in the IDAT chunk as well as the chunk CRCs.
  Issue png_benign_error() on ADLER32 checksum mismatch instead of png_error().
  Add tests/badcrc.png and tests/badadler.png to tests/pngtest.
  Merged pngtest.c with libpng-1.7.0beta84/pngtest.c

Version 1.6.26beta02 [October 1, 2016]
  Updated the documentation about CRC and ADLER32 handling.
  Quieted 117 warnings from clang-3.8 in pngtrans.c, pngread.c,
     pngwrite.c, pngunknown.c, and pngvalid.c.
  Quieted 58 (out of 144) -Wconversion compiler warnings by changing
    flag definitions in pngpriv.h from 0xnnnn to 0xnnnnU and trivial changes
    in png.c, pngread.c, and pngwutil.c.

Version 1.6.26beta03 [October 2, 2016]
  Removed contrib/libtests/*.orig and *.rej that slipped into the tarballs.
  Quieted the 86 remaining -Wconversion compiler warnings by
    revising the png_isaligned() macro and trivial changes in png.c,
    pngerror.c, pngget.c, pngmem.c, pngset.c, pngrtran.c, pngrutil.c,
    pngwtran.c, pngwrite.c, and pngwutil.c.

Version 1.6.26beta04 [October 3, 2016]
  Quieted (bogus?) clang warnings about "absolute value has no effect"
    when PNG_USE_ABS is defined.
  Fixed offsets in contrib/intel/intel_sse.patch

Version 1.6.26beta05 [October 6, 2016]
  Changed integer constant 4294967294 to unsigned 4294967294U in pngconf.h
    to avoid a signed/unsigned compare in the preprocessor.

Version 1.6.26beta06 [October 7, 2016]
  Use zlib- inflateValidate() instead of inflateReset2() to
    optionally avoid ADLER32 evaluation.

Version 1.6.26rc01 [October 12, 2016]
  No changes.

Version 1.6.26 [October 20, 2016]
  Cosmetic change, "ptr != 0" to "ptr != NULL" in png.c and \ 
  Despammed email addresses (replaced "@" with " at ").
   2016-09-01 06:14:23 by Thomas Klausner | Files touched by this commit (3) | Package updated
Log message:
Updated png to 1.6.25.

Changes since the last public release (1.6.24):
  Reject oversized iCCP profile immediately.
  Cleaned up PNG_DEBUG compile of pngtest.c.
  Conditionally compile png_inflate().
  Don't install pngcp; it conflicts with pngcp in the pngtools package.
  Minor editing of INSTALL, (whitespace, added copyright line)
  Added MIPS support (Mandar Sahastrabuddhe \ 
  Rebased contrib/intel/intel_sse.patch after the MIPS implementation.
   2016-08-04 08:05:08 by Thomas Klausner | Files touched by this commit (3) | Package updated
Log message:
Updated png to 1.6.24.

Version 1.6.24beta01 [June 11, 2016]
  Avoid potential overflow of the PNG_IMAGE_SIZE macro.  This macro
    is not used within libpng, but is used in some of the examples.

Version 1.6.24beta02 [June 23, 2016]
  Correct filter heuristic overflow handling. This was broken when the
    write filter code was moved out-of-line; if there is a single filter and
    the heuristic sum overflows the calculation of the filtered line is not
    completed.  In versions prior to 1.6 the code was duplicated in-line
    and the check not performed, so the filter operation completed; however,
    in the multi-filter case where the sum is performed the 'none' filter would
    be selected if all the sums overflowed, even if it wasn't in the filter
    list.  The fix to the first problem is simply to provide PNG_SIZE_MAX as
    the current lmins sum value; this means the sum can never exceed it and
    overflows silently.  A reasonable compiler that does choose to inline
    the code will simply eliminate the sum check.
  The fix to the second problem is to use high precision arithmetic (this is
    implemented in 1.7), however a simple safe fix here is to chose the lowest
    numbered filter in the list from png_set_filter (this only works if the
    first problem is also fixed) (John Bowler).
  Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois).
  Fixed the case where PNG_IMAGE_BUFFER_SIZE can overflow in the application
    as a result of the application using an increased 'row_stride'; previously
    png_image_finish_read only checked for overflow on the base calculation of
    components.  (I.e. it checked for overflow of a 32-bit number on the total
    number of pixel components in the output format, not the possibly padded row
    length and not the number of bytes, which for linear formats is twice the
    number of components.)
  MSVC does not like '-(unsigned)', so replaced it with 0U-(unsigned)
  MSVC does not like (uInt) = -(unsigned) (i.e. as an initializer), unless
    the conversion is explicitly invoked by a cast.
  Put the SKIP definition in the correct place. It needs to come after the
    png.h include (see all the other .c files in contrib/libtests) because it
    depends on PNG_LIBPNG_VER.
  Removed the three compile warning options from the individual project
    files into the zlib.props globals.  It increases the warning level from 4
    to All and adds a list of the warnings that need to be turned off.  This is
    semi-documentary; the intent is to tell libpng users which warnings have
    been examined and judged non-fixable at present.  The warning about
    structure padding is fixable, but it would be a signficant change (moving
    structure members around).

Version 1.6.24beta03 [July 4, 2016]
  Optimized absolute value calculation in filter selection, similar to
    code in the PAETH decoder in pngrutil.c. Build with PNG_USE_ABS to
    use this.
  Added pngcp to the build together with a pngcp.dfa configuration test.
  Added high resolution timing to pngcp.
  Added "Common linking failures" section to INSTALL.
  Relocated misplaced #endif in png.c sRGB profile checking.
  Fixed two Coverity issues in pngcp.c.

Version 1.6.24beta04 [July 8, 2016]
  Avoid filter-selection heuristic sum calculations in cases where only one
    filter is a candidate for selection. This trades off code size (added
    private png_setup_*_row_only() functions) for speed.

Version 1.6.24beta05 [July 13, 2016]
  Fixed some indentation to comply with our coding style.
  Added contrib/tools/reindent.

Version 1.6.24beta06 [July 18, 2016]
  Fixed more indentation to comply with our coding style.
  Eliminated unnecessary tests of boolean png_isaligned() vs 0.

Version 1.6.24rc01 [July 25, 2016]
  No changes.

Version 1.6.24rc02 [August 1, 2016]
  Conditionally compile SSE2 headers in contrib/intel/intel_sse.patch
  Conditionally compile png_decompress_chunk().

Version 1.6.24rc03 [August 2, 2016]
  Conditionally compile ARM_NEON headers in pngpriv.h
  Updated contrib/intel/intel_sse.patch

Version 1.6.24[August 4, 2016]
  No changes.