Libpng 1.2.46rc02 - July 8, 2011

This is not intended to be a public release.  It will be replaced
within a few weeks by a public version or by another test version.

Files available for download:

Source files with LF line endings (for Unix/Linux) and with a
"configure" script

   libpng-1.2.46rc02.tar.xz (LZMA-compressed, recommended)
   libpng-1.2.46rc02.tar.gz
   libpng-1.2.46rc02.tar.bz2

Source files with LF line endings (for Unix/Linux) without the
"configure" script

   libpng-1.2.46rc02-no-config.tar.xz (LZMA-compressed, recommended)
   libpng-1.2.46rc02-no-config.tar.gz
   libpng-1.2.46rc02-no-config.tar.bz2

Source files with CRLF line endings (for Windows), without the
"configure" script

   lp1246r02.zip
   lp1246r02.7z
   lp1246r02.tar.bz2

Project files

   libpng-1.2.46rc02-project-netware.zip
   libpng-1.2.46rc02-project-wince.zip

Other information:

   libpng-1.2.46rc02-README.txt
   libpng-1.2.46rc02-KNOWNBUGS.txt
   libpng-1.2.46rc02-LICENSE.txt
   libpng-1.2.46rc02-Y2K-compliance.txt
   libpng-1.2.46rc02-[previous version]-diff.txt

Changes since the last public release (1.2.42):

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

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

version 1.2.44beta01 [June 18, 2010]
  In pngpread.c: png_push_have_row() add check for new_row > height
  Removed the now-redundant check for out-of-bounds new_row from example.c

version 1.2.44beta02 [June 19, 2010]
  In pngpread.c: png_push_process_row() add check for too many rows.
  Removed the now-redundant check for new_row > height in png_push_have_row().

version 1.2.44beta03 [June 20, 2010]
  Rewrote png_process_IDAT_data to consistently treat extra data as warnings
    and handle end conditions more cleanly.
  Removed the new (beta02) check in png_push_process_row().

version 1.2.44rc01 [June 21, 2010]
  Revised some comments in png_process_IDAT_data().
Send comments/corrections/commendations to png-mng-implement at lists.sf.net

version 1.2.44rc02 [June 22, 2010]
  Stop memory leak when reading a malformed sCAL chunk.

version 1.2.44rc03 [June 23, 2010]
  Revised pngpread.c patch of beta05 to avoid an endless loop.

version 1.2.44 [June 26, 2010]
  Updated some of the "last changed" dates.

version 1.2.45beta01 [June 7, 2011]
  Fixed uninitialized memory read in png_format_buffer() (Bug
    report by Frank Busse, related to CVE-2004-0421).
  Pass "" instead of '\0' to png_default_error() in png_err().  This mistake
    was introduced in libpng-1.2.20beta01.
  Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
    before IDAT.
  Ported bugfix in pngrtran.c from 1.5.3: when expanding a paletted image,
    always expand to RGBA if transparency is present.

version 1.2.45beta02 [June 8, 2011]
  Check for integer overflow in png_set_rgb_to_gray().

version 1.2.45beta03 [June 19, 2011]
  Check for sCAL chunk too short.

version 1.2.45rc01 and 1.0.55rc01 [June 30, 2011]
  Updated "last changed" dates and copyright year.

version 1.2.45 and 1.0.55 [July 7, 2011]
  No changes.

version 1.2.46rc01 and 1.0.56rc01 [July 8, 2011]
  Reverted changes to Makefile.am and Makefile.in to libpng-1.2.44 versions.

version 1.2.46rc02 and 1.0.56rc02 [July 8, 2011]
  Added CMakeLists.txt, projects/xcode, and pnggccrd.c to EXTRA_DIST in
    Makefile.am and Makefile.in

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Glenn R-P