libpng/ANNOUNCE

Libpng 1.2.21rc2 - September 27, 2007

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-1.2.21rc2.tar.gz
   libpng-1.2.21rc2.tar.bz2

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

   libpng-1.2.21rc2-no-config.tar.gz
   libpng-1.2.21rc2-no-config.tar.bz2

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

   lp1221r02.zip
   lp1221r02.tar.bz2

Project files

   libpng-1.2.21rc2-project-netware.zip
   libpng-1.2.21rc2-project-wince.zip

Other information:

   libpng-1.2.21rc2-README.txt
   libpng-1.2.21rc2-KNOWNBUGS.txt
   libpng-1.2.21rc2-LICENSE.txt
   libpng-1.2.21rc2-Y2K-compliance.txt

Changes since the last public release (1.2.19):

version 1.2.20beta01 [August 19, 2007]
  Fixed problem with compiling pnggccrd.c on Intel-Apple platforms.
  Added PNG_NO_ERROR_TEXT feature, with demo in contrib/pngminim
  Removed define PNG_WARN_UNINITIALIZED_ROW 1 /* 0: warning; 1: error */
    because it caused some trouble.

version 1.2.20beta02 [August 20, 2007]
  Avoid compiling pnggccrd.c on Intel-Apple platforms.

version 1.2.20beta03 [August 20, 2007]
  Added "/D PNG_NO_MMX_CODE" to the non-mmx builds of projects/visualc6
    and visualc71.

version 1.2.20beta04 [August 21, 2007]
  Revised pngvcrd.c for improved efficiency (Steve Snyder).

version 1.2.20rc1 [August 23, 2007]
  Revised pngconf.h to set PNG_NO_MMX_CODE for gcc-3.x compilers.

version 1.2.20rc2 [August 27, 2007]
  Revised scripts/CMakeLists.txt
  Revised #ifdefs to ensure one and only one of pnggccrd.c, pngvcrd.c,
    or part of pngrutil.c is selected.

version 1.2.20rc3 [September 27, 2007]
  Remove a little more code in pngwutil.c when PNG_NO_WRITE_FILTER is selected.
  Added /D _CRT_SECURE_NO_WARNINGS to visual6c and visualc71 projects.
  Compile png_mmx_support() in png.c even when PNG_NO_MMX_CODE is defined.
  Restored a "superfluous" #ifdef that was removed from 1.2.20rc2 pnggccrd.c,
    breaking the png_mmx_support() function.

version 1.2.20rc4 [September 1, 2007]
  Removed Intel contributions (MMX, Optimized C).

version 1.2.20rc5 [September 2, 2007]
  Restored configure and Makefile.in to rc3 and put a snippet of code in
    pnggccrd.c, to ensure configure makes the same PNG_NO_MMX_CODE selection

version 1.2.20rc6 [September 2, 2007]
  Fixed bugs in scripts/CMakeLists.txt
  Removed pngvcrd.c references from msvc projects.

version 1.0.28 and 1.2.20 [September 8, 2007]
  Removed "(NO READ SUPPORT)" from png_get_header_version() string.

version 1.2.21beta1 [September 14, 2007]
  Fixed various mistakes reported by George Cook and Jeff Phillips:
  logical vs bitwise NOT in pngrtran.c, bug introduced in 1.2.19rc2
  16-bit cheap transparency expansion, bug introduced in 1.2.19beta2
  errors with sizeof(unknown_chunk.name), bugs introduced in 1.2.19beta11
  <= compare with unsigned var in pngset.c, should be ==.

version 1.2.21beta2 [September 18, 2007]
  Removed some extraneous typecasts.

version 1.2.21rc1 [September 25, 2007]
  Fixed potential out-of-bounds reads in png_handle_pCAL() and
    png_handle_ztXt() ("flayer" results reported by Tavis Ormandy).

version 1.2.21rc2 [September 27, 2007]
  Fixed potential out-of-bounds reads in png_handle_sCAL(),
    png_handle_iTXt(), and png_push_read_tEXt().
  Remove some PNG_CONST declarations from pngwutil.c to avoid compiler warnings
  Revised makefiles to update libpng.pc properly.

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Glenn R-P