Libpng 1.5.11 - June 14, 2012

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-1.5.11.tar.xz (LZMA-compressed, recommended)
   libpng-1.5.11.tar.gz
   libpng-1.5.11.tar.bz2

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

   lpng1511.7z  (LZMA-compressed, recommended)
   lpng1511.zip

Other information:

   libpng-1.5.11-README.txt
   libpng-1.5.11-LICENSE.txt

Changes since the last public release (1.5.10):
  Revised scripts/makefile.darwin: use system zlib; remove quotes around
    architecture list; add missing ppc architecture; add architecture options
    to shared library link; don't try to create a shared lib based on missing
    RELEASE variable.
  Enable png_set_check_for_invalid_index() for both read and write.
  Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED/#endif in pngpriv.h around
    declaration of png_handle_unknown().
  Added -lssp_nonshared in a comment in scripts/makefile.freebsd
    and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE.
  Revised CMakeLists.txt to not attempt to make a symlink under mingw.
  Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale),
    and renamed three whose names were inconsistent with those in
    pngsuite/README.txt.
  Do not depend upon a GCC feature macro being available for use in generating
    the linker mapfile symbol prefix.
  Made fixes for new optimization warnings from gcc 4.7.0. The compiler
    performed an optimization which is safe but then warned about it.
    Changing the type of 'palette_number' in pngvalid.c removes the warning.
  Improved efficiency of new do_check_palette_indexes() function.
  Don't check palette indexes if num_palette is 0 (as it can be in MNG files).
  Include zlib.h in contrib/gregbook and contrib/visupng examples.

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Glenn R-P