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- update to 1.6.25:
  Reject oversized iCCP profile immediately.
  Conditionally compile png_inflate().
  Don't install pngcp; it conflicts with pngcp in the pngtools package.
  Added MIPS support (Mandar Sahastrabuddhe <

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- update to 1.6.24:
  Avoid potential overflow of the PNG_IMAGE_SIZE macro.
  Correct filter heuristic overflow handling.
  Use a more efficient absolute value calculation on SSE2.
  Added pngcp.
  etc. see ANNOUNCE

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Update to 1.6.23
Some possible security fixes.

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- update to 1.6.22:
  Added a png_image_write_to_memory() API and a number of assist macros
    to allow an application that uses the simplified API write to bypass
    stdio and write directly to memory.
  Relaxed limit checks on gamma values in pngrtran.c. As suggested in
    the comments gamma values outside the range currently permitted
    by png_set_alpha_mode are useful for HDR data encoding.  These values
    are already permitted by png_set_gamma so it is reasonable caution to
    extend the png_set_alpha_mode range as HDR imaging systems are starting
    to emerge.
  Restored "& 0xff" in png_save_uint_16() and png_save_uint_32() that
    were accidentally removed from libpng-1.6.17.
  Changed PNG_INFO_cHNK and PNG_FREE_cHNK from 0xnnnn to 0xnnnnU in png.h
    (Robert C. Seacord).
  Added INTEL-SSE2 support (Mike Klein and Matt Sarett, Google, Inc.).
  SSE filter speed improvements for bpp=3:
    memcpy-free implementations of load3() / store3().
  Added PNG_FAST_FILTERS macro (defined as
    PNG_FILTER_NONE|PNG_FILTER_SUB|PNG_FILTER_UP).

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baserev update by copy to link target

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- Update to new upstream release 1.6.21

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- update to 1.6.20:
  Avoid potential pointer overflow/underflow in png_handle_sPLT() and
    png_handle_pCAL() (Bug report by John Regehr).
  Fixed incorrect implementation of png_set_PLTE() that uses png_ptr
    not info_ptr, that left png_set_PLTE() open to the CVE-2015-8126
    vulnerability.
  Backported tests from libpng-1.7.0beta69.
  Fixed an error in handling of bad zlib CMINFO field in pngfix, found by
    American Fuzzy Lop, reported by Brian Carpenter.  inflate() doesn't
    immediately fault a bad CMINFO field; instead a 'too far back' error
    happens later (at least some times).  pngfix failed to limit CMINFO to
    the allowed values but then assumed that window_bits was in range,
    triggering an assert. The bug is mostly harmless; the PNG file cannot
    be fixed.
  In libpng 1.6 zlib initialization was changed to use the window size
    in the zlib stream, not a fixed value. This causes some invalid images,
    where CINFO is too large, to display 'correctly' if the rest of the
    data is valid.  This provides a workaround for zlib versions where the
    error arises (ones that support the API change to use the window size
    in the stream).

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- update to 1.6.19:
  Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c
  Fixed uninitialized variable in contrib/gregbook/rpng2-x.c
  Fixed the recently reported 1's complement security issue.
  Fixed png_save_int_32 when int is not 2's complement by replacing
    the value that is illegal in the PNG spec, in both signed and 
    unsigned values, with 0.
 etc., see ANNOUNCE and CHANGES for details
- removed: libpng-rgb_to_gray-checks.patch (upstreamed)

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baserev update by copy to link target

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- drop unknown configure switch

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baserev update by copy to link target

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- updated to 1.6.17:

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- Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c.
  + libpng-rgb_to_gray-checks.patch

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- updated to 1.6.27:
  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.
  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.
  Do not build png_product2() when it is unused.
  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.
  Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default.
  Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins).
  Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block
    of png.h.
  Free the unknown_chunks structure even when it contains no data.
  Fixed simplified 8-bit-linear to sRGB alpha. The calculated alpha
    value was wrong.  It's not clear if this affected the final stored
    value; in the obvious code path the upper and lower 8-bits of the
    alpha value were identical and the alpha was truncated to 8-bits
    rather than dividing by 257 (John Bowler).

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baserev update by copy to link target

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