ANNOUNCE

Libpng 1.6.17rc04 - March 16, 2015

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

   1.6.17rc04.tar.xz (LZMA-compressed, recommended)
   1.6.17rc04.tar.gz

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

   lp1617r04.7z  (LZMA-compressed, recommended)
   lp1617r04.zip

Other information:

   1.6.17rc04-README.txt
   1.6.17rc04-LICENSE.txt
   libpng-1.6.17rc04-*.asc (armored detached GPG signatures)

Changes since the last public release (1.6.16):

Version 1.6.17beta01 [January 29, 2015]
  Removed duplicate PNG_SAFE_LIMITS_SUPPORTED handling from pngconf.h
  Corrected the width limit calculation in png_check_IHDR().
  Removed user limits from pngfix. Also pass NULL pointers to
    png_read_row to skip the unnecessary row de-interlace stuff.
  Added testing of png_set_packing() to pngvalid.c
  Regenerated configure scripts in the *.tar distributions with libtool-2.4.4
  Implement previously untested cases of libpng transforms in pngvalid.c
  Fixed byte order in 2-byte filler, in png_do_read_filler().
  Made the check for out-of-range values in png_set_tRNS() detect
    values that are exactly 2^bit_depth, and work on 16-bit platforms.
  Merged some parts of libpng-1.6.17beta01 and libpng-1.7.0beta47.
  Added #ifndef __COVERITY__ where needed in png.c, pngrutil.c and
    pngset.c to avoid warnings about dead code.
  Added "& 0xff" to many instances of expressions that are typecast
    to (png_byte), to avoid Coverity gripes.

Version 1.6.17beta02 [February 7, 2015]
  Work around one more Coverity-scan dead-code warning.
  Do not build png_product2() when it is unused.

Version 1.6.17beta03 [February 17, 2015]
  Display user limits in the output from pngtest.
  Eliminated the PNG_SAFE_LIMITS macro and restored the 1-million-column
    and 1-million-row default limits in pnglibconf.dfa, that can be reset
    by the user at build time or run time.  This provides a more robust
    defense against DOS and as-yet undiscovered overflows.

Version 1.6.17beta04 [February 21, 2015]
  Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default.
  Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins).
  Rebuilt configure scripts with automake-1.15 and libtool-2.4.6

Version 1.6.17beta05 [February 25, 2015]
  Restored compiling of png_reciprocal2 with PNG_NO_16BIT.

Version 1.6.17beta06 [February 27, 2015]
  Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block
    of png.h.
  Avoid runtime checks when converting integer to png_byte with
    Visual Studio (Sergey Kosarevsky)

Version 1.6.17rc01 [March 4, 2015]
  No changes.

Version 1.6.17rc02 [March 9, 2015]
  Removed some comments that the configure script did not handle
    properly from scripts/pnglibconf.dfa and pnglibconf.h.prebuilt.
  Free the unknown_chunks structure even when it contains no data.

Version 1.6.17rc03 [March 12, 2015]
  Updated CMakeLists.txt to add OSX framework, change YES/NO to ON/OFF
    for consistency, and remove some useless tests (Alexey Petruchik).

Version 1.6.17rc04 [March 16, 2015]
  Remove pnglibconf.h, pnglibconf.c, and pnglibconf.out instead of
    pnglibconf.* in "make clean" (Cosmin).
  Fix bug in calculation of maxbits, in png_write_sBIT, introduced
    in libpng-1.6.17beta01 (John Bowler).

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