Libpng 1.0.56 - July 9, 2011

This is a public release of libpng, intended for use in production codes.

Files available for download:

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

   libpng-1.0.56.tar.xz (LZMA-compressed, recommended)
   libpng-1.0.56.tar.gz
   libpng-1.0.56.tar.bz2

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

   libpng-1.0.56-no-config.tar.xz (LZMA-compressed, recommended)
   libpng-1.0.56-no-config.tar.gz
   libpng-1.0.56-no-config.tar.bz2

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

   lpng1056.zip
   lpng1056.7z
   lpng1056.tar.bz2

Project files

   libpng-1.0.56-project-netware.zip
   libpng-1.0.56-project-wince.zip

Other information:

   libpng-1.0.56-README.txt
   libpng-1.0.56-KNOWNBUGS.txt
   libpng-1.0.56-LICENSE.txt
   libpng-1.0.56-Y2K-compliance.txt

Changes since the last public release (1.0.53):

version 1.0.55 [July 9, 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.
  Check for integer overflow in png_set_rgb_to_gray().
  Check for sCAL chunk too short.
  Added CMakeLists.txt, projects/xcode, and pnggccrd.c to EXTRA_DIST in
    Makefile.am and Makefile.in
  Udated copyright year to 2011.

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