1 Libpng 1.6.17 - March 26, 2015
3 This is a public release of libpng, intended for use in production codes.
5 Files available for download:
7 Source files with LF line endings (for Unix/Linux) and with a
10 libpng-1.6.17.tar.xz (LZMA-compressed, recommended)
13 Source files with CRLF line endings (for Windows), without the
16 lpng1617.7z (LZMA-compressed, recommended)
21 libpng-1.6.17-README.txt
22 libpng-1.6.17-LICENSE.txt
23 libpng-1.6.17-*.asc (armored detached GPG signatures)
25 Changes since the last public release (1.6.16):
27 Removed duplicate PNG_SAFE_LIMITS_SUPPORTED handling from pngconf.h
28 Corrected the width limit calculation in png_check_IHDR().
29 Removed user limits from pngfix. Also pass NULL pointers to
30 png_read_row to skip the unnecessary row de-interlace stuff.
31 Added testing of png_set_packing() to pngvalid.c
32 Regenerated configure scripts in the *.tar distributions with libtool-2.4.4
33 Implement previously untested cases of libpng transforms in pngvalid.c
34 Fixed byte order in 2-byte filler, in png_do_read_filler().
35 Made the check for out-of-range values in png_set_tRNS() detect
36 values that are exactly 2^bit_depth, and work on 16-bit platforms.
37 Merged some parts of libpng-1.6.17beta01 and libpng-1.7.0beta47.
38 Added #ifndef __COVERITY__ where needed in png.c, pngrutil.c and
39 pngset.c to avoid warnings about dead code.
40 Do not build png_product2() when it is unused.
41 Display user limits in the output from pngtest.
42 Eliminated the PNG_SAFE_LIMITS macro and restored the 1-million-column
43 and 1-million-row default limits in pnglibconf.dfa, that can be reset
44 by the user at build time or run time. This provides a more robust
45 defense against DOS and as-yet undiscovered overflows.
46 Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default.
47 Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins).
48 Rebuilt configure scripts with automake-1.15 and libtool-2.4.6
49 Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block
51 Avoid runtime checks when converting integer to png_byte with
52 Visual Studio (Sergey Kosarevsky)
53 Removed some comments that the configure script did not handle
54 properly from scripts/pnglibconf.dfa and pnglibconf.h.prebuilt.
55 Free the unknown_chunks structure even when it contains no data.
56 Updated CMakeLists.txt to add OSX framework, change YES/NO to ON/OFF
57 for consistency, and remove some useless tests (Alexey Petruchik).
58 Remove pnglibconf.h, pnglibconf.c, pnglibconf.pre, pnglibconf.dfn,
59 and pnglibconf.out instead of pnglibconf.* in "make clean" (Cosmin).
60 Fixed simplified 8-bit-linear to sRGB alpha. The calculated alpha
61 value was wrong. It's not clear if this affected the final stored
62 value; in the obvious code path the upper and lower 8-bits of the
63 alpha value were identical and the alpha was truncated to 8-bits
64 rather than dividing by 257 (John Bowler).
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