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.

Log message:
Update to 1.2.41:

version 1.2.41beta01 [September 25, 2009]
  Moved redundant IHDR checking into new png_check_IHDR() in png.c
    and report all errors found in the IHDR data.
  Eliminated useless call to png_check_cHRM() from pngset.c
  Expanded TAB characters in pngrtran.c

version 1.2.41beta02 [September 30, 2009]
  Revised png_check_IHDR().

version 1.2.41beta03 [October 1, 2009]
  Revised png_check_IHDR() again, to check info_ptr members instead of
    the contents of the returned parameters.

version 1.2.41beta04 [October 7, 2009]
  Added "xcode" project similar one already in libpng-1.4.0beta (Alam \ 
Arias).
  Ported some cosmetic changes from libpng-1.4.0beta86.
  Eliminated a shadowed declaration of "pp" in png_handle_sPLT().

version 1.2.41beta05 [October 17, 2009]
  Revised pngconf.h to make it easier to enable iTXt support.  From libpng
    version 1.2.9 through 1.2.40, defining PNG_iTXt_SUPPORTED did not work
    as expected.
  Ported some cosmetic changes from libpng-1.4.0beta87, changing
    many "#if defined(x)" to "#ifdef x".

version 1.2.41beta06 [October 18, 2009]
  Restored PNG_USE_LOCAL_ARRAYS code in pngread.c that was inadvertently
    deleted in libpng-1.2.41beta05.
  Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
    as in libpng-1.4.0beta78 and later.

version 1.2.41beta07 [October 21, 2009]
  Ported some cosmetic changes from libpng-1.4.0rc01, changing
    many "#if defined(x)" to "#ifdef x" in png.h and pngconf.h.

version 1.2.41beta08 [October 30, 2009]
  Ported from libpng-1.4.0rc01: png_calloc(), png_get_io_chunk_name(),
    png_get_io_state(), png_set_user_cache_max(), png_get_user_cache_max(),
    png_set_premultiply_alpha, and png_do_read_premultiply_alpha().
  Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
    This avoids building 16-bit gamma tables unnecessarily.

version 1.2.41beta09 [November 1, 2009]
  Removed a harmless extra png_set_invert_alpha() from pngwrite.c
  More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
  Moved CMakeLists.txt from scripts into the main libpng directory.
  Apply png_user_chunk_cache_max within png_decompress_chunk().
  Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.

version 1.2.41beta10 [November 1, 2009]
  Enabled iTXt support by default. To ensure binary compatibility with
    previous versions, the "lang" and "lang_key" members \ 
will be assumed
    to be omitted from previous versions unless the current libpng
    version was built with PNG_iTXt_SUPPORTED (which is otherwise no
    longer necessary to gain iTXt support), as a signal that the user has
    been building previous versions with PNG_iTXt_SUPPORTED as well.

version 1.2.41beta11 [November 2, 2009]
  Store user's user_png_ver in new png_ptr->user_png_ver element.
  Revised iTXt support. To ensure binary compatibility with
    previous versions, the "lang" and "lang_key" members \ 
will be assumed
    to be omitted from versions prior to 1.2.41beta11 whenever there is a
    library mismatch.

version 1.2.41beta12 [November 2, 2009]
  Free png_ptr->user_png_ver when destroying png_ptr.

version 1.2.41beta13 [November 3, 2009]
  Updated scripts/pngw32.def and projects/wince/png32ce.def
  Copied projects/wince/png32ce.def to the scripts directory.
  Added scripts/makefile.wce
  Patched ltmain.sh for wince support.
  Added PNG_CONVERT_tIME_SUPPORTED macro.

version 1.2.41beta14 [November 8, 2009]
  versions 1.2.41beta05 through 1.2.41beta13 were abandoned.
  The 1.0.x/1.2.x series will only receive security updates from now on.
  Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
  Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED
  Reverted iTXt compatibility stuff from 1.2.41beta05, 1.2.41beta11, and
    1.2.41beta12.
  Reverted IOSTATE feature, user_cache_max, and premultiply_alpha features
    from 1.2.41beta08.
  Retained png_calloc() from 1.2.41beta08 but as a non-exported function,
    and removed reference to png_calloc from scripts/*.def

version 1.2.41beta15 [November 8, 2009]
  Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and
    PNG_ALLOCATED macros to detect deprecated direct access to the
    png_struct or info_struct members and other deprecated usage in
    applications (John Bowler).
  Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS,
    to prevent warnings about direct access to png structs by libpng
    functions while building libpng.  They need to be tested, especially
    those using compilers other than gcc.
  Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG".

version 1.2.41beta16 [November 9, 2009]
  Removed three direct references to read_info_ptr members in pngtest.c
    that were detected by the new PNG_DEPSTRUCT macro.
  Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.

version 1.2.41beta17 [November 10, 2009]
  Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the \ 
definitions.
  Marked deprecated function prototypes with PNG_DEPRECATED.
  Marked memory allocation function prototypes with PNG_ALLOCATED.
  Changed png_check_sig() to !png_sig_cmp() in contrib programs.
  Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
  Added "-DPNG_CONFIGURE_LIBPNG" to the contrib/pngminum makefiles.

version 1.2.41beta18 [November 11, 2009]
  Renamed scripts/makefile.wce to scripts/makefile.cegcc
  Marked nonexported functions with PNG_PRIVATE macro.

version 1.2.41rc01 and 1.0.51rc01 [November 18, 2009]
  Revised scripts/*.def to reflect functions actually exported by libpng.
  Updated the copyright year in scripts/pngw32.rc from 2004 to 2009.
  Moved descriptions of makefiles and other scripts out of INSTALL into
    scripts/README.txt

version 1.2.41rc02 [November 22, 2009]
  Rebuilt the configure scripts with autoconf-2.65

version 1.2.41rc03 [November 25, 2009]
  Disabled the new pedantic warnings about deprecated function use
    and deprecated structure access unless the user defines
    PNG_PEDANTIC_WARNINGS.
  Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
  Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.

version 1.2.41 [December 3, 2009]
  Updated the list of files and made some cosmetic changes in README.

Log message:
Update to 1.2.40:

version 1.2.40beta01 [August 20, 2009]
  Removed an extra png_debug() recently added to png_write_find_filter().
  Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.

version 1.2.40rc01 [September 2, 2009]
  Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)

version 1.2.40 and 1.0.49 [September 10, 2009]
  No changes.

Log message:
Use .tar.bz2 again, 112kb bigger (gz is 280kb bigger).

Log message:
Update to 1.2.39. Use .xz instead of .gz. (20% smaller)

version 1.2.39beta01 [July 25, 2009]
  Added a prototype for png_64bit_product() in png.c

version 1.2.39beta02 [July 27, 2009]
  Avoid a possible NULL dereference in debug build, in png_set_text_2().
    (bug introduced in libpng-0.95, discovered by Evan Rouault)

version 1.2.39beta03 [July 29, 2009]
  Relocated new png_64_bit_product() prototype into png.h
  Expanded the information about prototypes in the libpng style section of
    the documentation.
  Rebuilt configure scripts with autoconf-2.64.

version 1.2.39beta04 [August 1, 2009]
  Replaced *.tar.lzma with *.txz in distribution.  Get the xz codec
    from <http://tukaani.org/xz>.

version 1.2.39beta05 [August 1, 2009]
  Reject attempt to write iCCP chunk with negative embedded profile length
    (JD Chen)

version 1.2.39c01 [August 6, 2009]
  No changes.

version 1.2.39 and 1.0.48 [August 13, 2009]
  No changes.