Log message:
Update to 1.5.1beta06:

Version 1.5.1beta02 [January 14, 2011]
  Fixed a bug in handling of interlaced images (bero at arklinux.org).
  Updated CMakeLists.txt (Clifford Yapp)

Version 1.5.1beta03 [January 14, 2011]
  Fixed typecasting of some png_debug() statements (Cosmin)

Version 1.5.1beta04 [January 16, 2011]
  Updated documentation of png_set|get_tRNS() (Thomas Klausner).
  Mentioned in the documentation that applications must #include "zlib.h"
    if they need access to anything in zlib.h, and that a number of
    macros such as png_memset() are no longer accessible by applications.
  Corrected pngvalid gamma test "sample" function to access all of the \ 
color
    samples of each pixel, instead of sampling the red channel three times.
  Prefixed variable names index, div, exp, gamma with "png_" to avoid \ 
"shadow"
    warnings, and (mistakenly) changed png_exp() to exp().

Version 1.5.1beta05 [January 16, 2011]
  Changed variable names png_index, png_div, png_exp, and png_gamma to
    char_index, divisor, exp_b10, and gamma_val, respectively, and
    changed exp() back to png_exp().

Version 1.5.1beta06 [January 20, 2011]
  Prevent png_push_crc_skip() from hanging while reading an unknown chunk
    or an over-large compressed zTXt chunk with the progressive reader.
  Eliminated more GCC "shadow" warnings.
  Revised png_fixed() in png.c to avoid compiler warning about reaching the
    end without returning anything.

Log message:
Update to 1.5.1beta01:

1.5.1beta01 contains a security fix for 1.5.0.

The current public release, libpng 1.5.0, continues the evolution
of the libpng API, finally hiding the contents of the venerable
and hoary png_struct and png_info data structures inside private
(i.e., non-installed) header files. (Apps that compiled with libpng
1.4 without warnings about deprecated features should happily
compile with 1.5, too.) It also includes a new, more thorough test
program (pngvalid.c), a new pnglibconf.h header file that tracks
what features were enabled or disabled when libpng was built, and
huge thanks to John Bowler, who did most of the work. Complete
differences relative to libpng 1.4.x are detailed at
http://www.libpng.org/pub/png/src/libpng-1.4.x-to-1.5.x-summary.txt .

Since the shlib name changed, next up: PKGREVISION++ all across pkgsrc.

Log message:
Update to 1.4.5:

version 1.4.5beta01 [September 25, 2010]
  Fixed possible configure.ac bug introduced in version 1.4.4rc05.
  Rebuilt configure scripts with autoconf-2.68 instead of autoconf-2.65

version 1.4.5beta02 [October 5, 2010]
  Reverted configure scripts to autoconf-2.65
  Fixed problem with symbols creation in Makefile.am which was assuming that
    all versions of cpp write to standard output by default (Martin Banky). The
    bug was introduced in libpng-1.2.9beta5.

version 1.4.5beta03 [October 8, 2010]
  Wrapped long lines in CMakeLists.txt and introduced ${libpng_public_hdrs}
  Undid Makefile.am revision of 1.4.5beta02.

version 1.4.5beta04 [November 8, 2010]
  Check for out-of-range text compression mode in png_set_text().

version 1.4.5rc01 [November 19, 2010]
  No changes.

version 1.4.5beta05 [November 20, 2010]
  Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
  Moved reading of file signature into png_read_sig (Cosmin)
  Fixed atomicity of chunk header serialization (Cosmin)
  Added test for io_state in pngtest.c (Cosmin)
  Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.

version 1.4.5beta06 [November 21, 2010]
  Restored the parentheses in pngrutil.c; they are needed when the
    png_get_*int_*() functions are compiled (i.e., when PNG_USE_READ_MACROS
    is not defined).
  Make the "png_get_uint_16" macro return a png_uint_32 in libpng-1.4 \ 
for API
    compatibility.
  Changes to remove gcc warnings (John Bowler)
    Certain optional gcc warning flags resulted in warnings in libpng code.
    With these changes only -Wconversion and -Wcast-qual cannot be turned on.
    Changes are trivial rearrangements of code.  -Wconversion is not possible
    for pngrutil.c (because of the widespread use of += et al on variables
    smaller than (int) or (unsigned int)) and -Wcast-qual is not possible
    with pngwio.c and pngwutil.c because the 'write' callback and zlib
    compression both fail to declare their input buffers with 'const'.

version 1.4.5beta07 [November 25, 2010]
  Reverted png_get_uint_16 macro to beta05 and added comment about the
    potential API incompatibility.

version 1.4.5rc02 [December 2, 2010]
  No changes.

version 1.4.5rc03 [December 3, 2010]
  Added missing vstudio/*/*.vcxproj files to the zip and 7z distributions.

version 1.4.5 [December 9, 2010]
  Removed PNG_NO_WRITE_GAMMA from pngminim/encoder/pngusr.h

Log message:
Update to 1.4.4:

version 1.4.4beta01 [July 12, 2010]
  Removed extraneous new_push_process_row.c file.
  Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
  Removed some newly-added TAB characters from pngpread.c.
  Fixed some indentation in pngpread.c and pngrutil.c
  Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan \ 
Nijtmans)
  Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for \ 
the 'extern "C" {')
  Put "#ifndef PNG_EXTERN, #endif" around "#define \ 
PNG_EXTERN" in pngpriv.h

version 1.4.4beta02 [July 24, 2010]
  Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
  Moved the definition of png_snprintf() outside of the enclosing
    #ifdef blocks in pngconf.h
  Added a special case typedef of png_longjmp_ptr for WATCOM.

version 1.4.4beta03 [July 24, 2010]
  Removed reference to cbuilder5/* from Makefile.in and Makefile.am
  Eliminated the new special case typedef of png_longjmp_ptr for WATCOM
    and made a special case "#define PNGAPI" in pngconf.h instead.

version 1.4.4beta04 [July 31, 2010]
  Updated the read macros and functions from 1.5.0beta38.

version 1.4.4beta05 [August 6, 2010]
  Updated projects/visualc71 so it can find scripts/pnglibconf.h
  Removed unused png_mem_* defines from pngconf.h.
  Correct use of _WINDOWS_ in pngconf.h

version 1.4.4beta06 [August 11, 2010]
  Don't try to use version-script with cygwin/mingw.
  Revised contrib/gregbook to work under cygwin/mingw.

version 1.4.4beta07 [August 26, 2010]
  Updated prebuilt aclocal.m4 and ltmain.sh
  Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
  Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
    installing libpng in /usr/lib64 (Funda Wang).
  Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
  Revised CMakeLists.txt to make symlinks instead of copies when installing.
  Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)
  Moved "#include pngusr.h" ahead of PNG_USER_PRIVATEBUILD test in \ 
pngconf.h
  Eliminated a deprecated reference to png_ptr->io_ptr in pngtest.c
  Eliminated new unnecessary #if tests regarding the sCAL chunk from pngrutil.c

version 1.4.4beta08 [September 2, 2010]
  Updated the xcode project to work with libpng-1.4.x and added iOS targets
    for simulator and device (Philippe Hausler).

version 1.4.4rc01 [September 10, 2010]
  No changes.

version 1.4.4rc02 [September 13, 2010]
  Revised CMakeLists.txt (Philip Lowman).

version 1.4.4rc03 [September 14, 2010]
  Removed an extraneous close-double-quote from CMakeLists.txt
  Eliminated another deprecated reference to png_ptr->io_ptr in pngtest.c

version 1.4.4rc04 [September 16, 2010]
  Fixed indentation and removed debugging message from CMakeLists.txt
  Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
    $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE

version 1.4.4rc05 [September 20, 2010]
  Rebuilt configure scripts with automake-1.11.1 instead of automake-1.11.
  Removed unused mkinstalldirs file.

version 1.4.4 [September 23, 2010]
  No changes.

Log message:
Security update to 1.4.3:
Several versions of libpng through 1.4.2 (and through 1.2.43 in
the older series) contain a bug whereby progressive applications
such as web browsers (or the rpng2 demo app included in libpng)
could receive an extra row of image data beyond the height reported
in the header, potentially leading to an out-of-bounds write to
memory (depending on how the application is written) and the
possibility of execution of an attacker's code with the privileges
of the libpng user (including remote compromise in the case of a
libpng-based browser visiting a hostile web site). This vulnerability
has been assigned ID CVE-2010-1205  (via Mozilla).

An additional memory-leak bug, involving images with malformed sCAL
chunks, is also present; it could lead to an application crash
(denial of service) when viewing such images.

Both bugs are fixed in versions 1.4.3 and 1.2.44.

version 1.4.3beta01 [June 18, 2010]
  Added missing quotation marks in the aix block of configure.ac
  The new "vstudio" project was missing from the zip and 7z distributions.
  In pngpread.c: png_push_have_row() add check for new_row > height

version 1.4.3beta02 [June 18, 2010]
  Removed the now-redundant check for out-of-bounds new_row from example.c

version 1.4.3beta03 [June 18, 2010]
  In pngpread.c: png_push_finish_row() add check for too many rows.

version 1.4.3beta04 [June 19, 2010]
  In pngpread.c: png_push_process_row() add check for too many rows.
  Removed the checks added in beta01 and beta03, as they are now redundant.

version 1.4.3beta05 [June 20, 2010]
  Rewrote png_process_IDAT_data to consistently treat extra data as warnings
    and handle end conditions more cleanly.
  Removed the new (beta04) check in png_push_process_row().

version 1.4.3rc01 [June 21, 2010]
  Revised some comments in png_process_IDAT_data().

version 1.4.3rc02 [June 22, 2010]
  Changed char *msg to PNG_CONST char *msg in pngrutil.c
  Stop memory leak when reading a malformed sCAL chunk.
  Removed some trailing blanks.

version 1.4.3rc03 [June 23, 2010]
  Revised pngpread.c patch of beta05 to avoid an endless loop.

version 1.4.3 [June 26, 2010]
  Updated some of the "last changed" dates.

Log message:
Update to 1.4.2. Shared library name changes from libpn12.* to libpng14.*,
so bump ABI depends.

Remove libpng.* from package, instead use buildlink to help some packages
that are looking for the library themselves instead of using pkg-config
or libpng-config.

Changes:

version 1.4.2:
  Restored the macro definition of png_check_sig().
  Conditionally compile an "else" statement in png_decompress_chunk().
  Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
  Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
    more accurately what it actually does.  At the same time, renamed
    the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
    PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
  Added some "(long)" typecasts to printf calls in png_handle_cHRM().
  Relaxed the overly-restrictive permissions of some files.
  Added the "vstudio" project to replace "visualc6" and \ 
"visualc71" which
    will be removed from libpng-1.5.0.
  Demonstrate in example.c that lang_key should be initialized.
  Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in
    contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
  Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
  Removed dummy_inflate.c and uncompr.c from contrib/pngminim/encoder
  Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED
    in gregbook/readpng2.c
  Corrected protection of png_get_user_transform_ptr. The API declaration in
    png.h is removed if both READ and WRITE USER_TRANSFORM are turned off
    but was left defined in pngtrans.c
  Moved declarations of umsg[] inside the proper #ifdef blocks in pngrutil.c

version 1.4.1 [February 25, 2010]

  Updated CMakeLists.txt for consistent indentation and to avoid an
    unclosed if-statement warning (Philip Lowman).
  Revised Makefile.am and Makefile.in to remove references to Y2KINFO,
    KNOWNBUG, and libpng.la (Robert Schwebel).
  Revised the makefiles to install the same files and symbolic
    except for libpng.la and libpng14.la.
  Make png_set|get_compression_buffer_size() available even when
    PNG_WRITE_SUPPORTED is not enabled.
  Revised Makefile.am and Makefile.in to simplify their maintenance.
  Revised the makefiles to install a link to libpng14.so.14.1
  Removed png_set_premultiply_alpha() from scripts/*.def
  Revised png_decompress_chunk() to improve speed and memory usage when
    decoding large chunks, using a two-pass method suggested by John Bowler.
  Added png_set|get_chunk_malloc_max() functions.
  Relocated "int k" declaration in pngtest.c to minimize its scope.
  Folded some long lines in the source files.
  Added defineable PNG_USER_CHUNK_CACHE_MAX and PNG_USER_CHUNK_MALLOC_MAX
  Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as
    png_ptr->png_user_chunk_malloc_max.
  Return allocated "old_buffer" in png_push_save_buffer() before calling
    png_error(), to avoid a potential memory leak.
  Removed the cbuilder5 project, which has not been updated to 1.4.0.
  Complete rewrite of two-pass png_decompress_chunk() by John Bowler.
  Removed obsolete unused MMX-querying support from contrib/gregbook
  Removed the AIX redefinition of jmpbuf in png.h
  Define _ALL_SOURCE in configure.ac, makefile.aix, and CMakeLists.txt
    when using AIX compiler.
  Removed unused gzio.c from contrib/pngminim gather and makefile scripts

Changes to Libpng from version 1.2.42 to 1.4.0 (January 4, 2010)

Libpng-1.4.0 was released by the PNG Development Group on January
3, 2010.  Important new features include support for the iTXt chunk
and a function for limiting the amount of memory that a possibly
malicious compressed chunk can consume.  Some long-deprecated functions
and features have been removed.  A new private header file that is
not visible to applications has been created, to improve our ability
to maintain binary compatibility among future libpng versions.

Specifically,

1. Private libpng prototypes and macro definitions were moved from
png.h and pngconf.h into a new pngpriv.h header file that is not
visible to applications.

2. Some obsolete/deprecated macros and functions have been removed.

   a. We eliminated the obsolete, unused pnggccrd.c and pngvcrd.c files
      and related makefiles.

   b. We removed the typecasted NULL definitions such as

          #define png_voidp_NULL    (png_voidp)NULL

      If you used these in your application, just use NULL instead.

   c. We eliminated the PNG_1_0_X and PNG_1_2_X macros.

   d. We eliminated the PNG_LEGACY_SUPPORTED macro.

   e. We removed many WIN32_WCE #ifdefs.

   f. We removed the functions png_read_init(info_ptr),
      png_write_init(info_ptr), png_info_init(info_ptr),
      png_read_destroy(), and png_write_destroy().
      They have been deprecated since libpng-0.95.

   g. We removed the png_permit_empty_plte() function. It has been
      deprecated since libpng-1.0.9.  Use png_permit_mng_features() instead.

   h. We removed the obsolete stub functions png_get_mmx_flagmask(),
      png_set_mmx_thresholds(), png_get_asm_flags(),
      png_get_mmx_bitdepth_threshold(), png_get_mmx_rowbytes_threshold(),
      png_set_asm_flags(), and png_mmx_supported()

   i. We removed the obsolete png_check_sig(), png_memcpy_check(), and
      png_memset_check() functions.  Instead use !png_sig_cmp(),
      png_memcpy(), and png_memset(), respectively, i.e.,

      replace
        png_check_sig(buf, 8)
      with
        png_sig_cmp(buf, 0, 8) == 0

      replace
        png_memcpy_check(png_ptr, dest, src, length)
      with
        png_memcpy(dest, src, length)

      and replace
        png_memset_check(png_ptr, dest, value, length)
      with
        png_memset(dest, value, length)

   j. We removed support for global arrays to improve thread safety.

   k. We removed support for numbered error messages by default, since we
      never got around to actually numbering the error messages. The function
      png_set_strip_error_numbers() was removed from the library by default.

   l. The png_zalloc() and png_zfree() functions are no longer exported.
      The png_zalloc() function no longer zeroes out the memory that it
      allocates.

   m. The function png_set_gray_1_2_4_to_8() was removed. It has been
      deprecated since libpng-1.0.18 and 1.2.9, when it was replaced with
      png_set_expand_gray_1_2_4_to_8() because the former function also
      expanded palette images.

3. Several function prototypes were changed.

   a. We changed the prototype for png_malloc() from
      png_malloc(png_structp png_ptr, png_uint_32 size) to
      png_malloc(png_structp png_ptr, png_alloc_size_t size)

   b. We changed the prototypes of png_get_compression_buffer_size() and
      png_set_compression_buffer_size() to work with png_size_t instead of
      png_uint_32.

4. We added some new features:

   a. We enabled iTXt chunk support by default.  This changes the png_text
      structure by adding the itxt_length, lang, and lang_key members.

   b. We added the functions png_set_benign_errors(), png_benign_error(),
      and png_chunk_benign_error().  With these, you can choose to treat
      certain normally fatal errors as nonfatal.

   c. Support for setting the maximum amount of memory that the application
      will allocate for reading chunks was added, as a security measure.
      The functions png_set_chunk_cache_max() and png_get_chunk_cache_max()
      were added to the library.

   d. We added the png_calloc() function and used it in place of
      of "png_malloc(); png_memset();" except in the case in png_read_png()
      where the array consists of pointers; in this case a "for" loop \ 
is used
      after the png_malloc() to set the pointers to NULL, to give robust.
      behavior in case the application runs out of memory part-way through
      the process.

   e. We implemented support for I/O states by adding png_ptr member io_state
      and functions png_get_io_chunk_name() and png_get_io_state() in pngget.c

   f. We added PNG_TRANSFORM_GRAY_TO_RGB to the available high-level
      input transforms.

5. Other changes

   a. We changed the names of the png_struct and info_struct members \ 
"trans"
      and "trans_values" to "trans_alpha" and \ 
"trans_color", respectively.

   b. Checking for and reporting of errors in the IHDR chunk is more thorough.

   c. We removed the trailing '.' from the warning and error messages.

   d. Direct access to png_ptr->jmpbuf has been deprecated since libpng
      version 1.0.6, and libpng now generates a warning about it.

      To avoid such warnings, change
        setjmp(png_ptr->jmpbuf)

      to
        setjmp(png_jmpbuf(png_ptr))

Log message:
Update to 1.2.43:

version 1.2.42beta01 [December 4, 2009]
  Removed "#define PNG_NO_ERROR_NUMBERS" that was inadvertently added
    to pngconf.h in version 1.2.41.
  Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
    to put png.h and pngconf.h in $prefix/include, like the other scripts,
    instead of in $prefix/include/libpng.  Also revised makefile.sco
    to put them in $prefix/include/libpng12 instead of in
    $prefix/include/libpng/libpng12.
  Removed leftover "-DPNG_CONFIGURE_LIBPNG" from scripts/makefile.darwin

version 1.2.42beta02 [December 11, 2009]
  Removed leftover "-DPNG_CONFIGURE_LIBPNG" from \ 
contrib/pngminim/*/makefile
  Relocated png_do_chop() to its original position in pngrtran.c. The
    change in version 1.2.41beta08 caused transparency to be handled wrong
    in some 16-bit datastreams (Yusaku Sugai).

version 1.2.42rc01 [December 17, 2009]
  No changes.

version 1.2.42rc02 [December 22, 2009]
  Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
    (revising changes made in 1.2.41beta17 and 1.2.41rc01)

version 1.2.42rc03 [December 25, 2009]
  Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED
    in pngset.c to be consistent with other changes in version 1.2.38.

version 1.2.42rc04 [January 1, 2010]
  Marked png_memcpy_check() and png_memset_check() PNG_DEPRECATED.
  Updated copyright year.

version 1.2.42rc05 [January 2, 2010]
  Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr
    in pngtest.c

version 1.2.42 and 1.0.52 [January 3, 2010]
  No changes.

version 1.2.43beta01 [January 27, 2010]
  Updated CMakeLists.txt for consistent indentation and to avoid an
    unclosed if-statement warning (Philip Lowman).
  Removed "#ifdef PNG_1_0_X / #endif" surrounding
    PNG_READ_16_TO_8_SUPPORTED and PNG_READ_GRAY_TO_RGB_SUPPORTED
    in pngconf.h.  These were added in libpng-1.2.41beta08 and libpng-1.0.51,
    which introduced a binary incompatibility with libpng-1.0.50.
  Backported new png_decompress_chunk() algorithm from libpng-1.4.1.

version 1.2.43beta02 [February 1, 2010]
  Backported two-pass png_decompress_chunk() algorithm from libpng-1.4.1.

version 1.2.43beta03 [February 6, 2010]
  Backported fast png_push_save_buffer() algorithm from libpng-1.4.1.
  Backported some cosmetic changes from libpng-1.4.1.

version 1.2.43beta04 [February 8, 2010]
  Reverted recent changes to png_push_save-buffer().
  Removed PNGAPI declaration of png_calloc() and png_write_sig() in
    1ibpng-1.2.X, introduced by mistake in libpng-1.2.41.
  Return allocated "old_buffer" in png_push_save_buffer() before \ 
png_error()
    to avoid a potential memory leak.

version 1.2.43beta05 [February 8, 2010]
  Ported rewritten png_decompress_chunk() by John Bowler from libpng-1.4.1.

version 1.0.53rc01 and 1.2.43rc01 [February 18, 2010]
  No changes.

version 1.0.53rc02 and 1.2.43rc02 [February 19, 2010]
  Define _ALL_SOURCE in configure.ac, makefile.aix, and CMakeLists.txt
    when using AIX compiler.

version 1.0.53 and 1.2.43 [February 25, 2010]
  Removed unused gzio.c from contrib/pngminim gather and makefile scripts

Log message:
scratch that, pkg-config does the right thing.
We only needed the fix for libpng-config.

Log message:
regen patch

Log message:
"pkg-config --libs png" and  "libpng-config --libs" should
request -lz linkage. Bump PKGREVISION.