blob: 5de4eed0999ba2bca1066f9fec88a7aad6f6ea58 [file] [log] [blame]
Libpng 1.6.21 - January 15, 2016
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-1.6.21.tar.xz (LZMA-compressed, recommended)
libpng-1.6.21.tar.gz
Source files with CRLF line endings (for Windows), without the
"configure" script
/scratch/glennrp/Libpng16/lpng1621.7z (LZMA-compressed, recommended)
/scratch/glennrp/Libpng16/lpng1621.zip
Other information:
libpng-1.6.21-README.txt
libpng-1.6.21-LICENSE.txt
libpng-1.6.21-*.asc (armored detached GPG signatures)
Changes since the last public release (1.6.20):
Fixed syntax "$(command)" in tests/pngstest that some shells other than
bash could not parse (Bug report by Nelson Beebe). Use `command` instead.
Moved png_check_keyword() from pngwutil.c to pngset.c
Removed LE/BE dependencies in pngvalid, to 'fix' the current problem
in the BigEndian tests by not testing it, making the BE code the same
as the LE version.
Fixes to pngvalid for various reduced build configurations (eliminate unused
statics) and a fix for the case in rgb_to_gray when the digitize option
reduces graylo to 0, producing a large error.
Widened the 'limit' check on the internally calculated error limits in
the 'DIGITIZE' case (the code used prior to 1.7 for rgb_to_gray error
checks) and changed the check to only operate in non-release builds
(base build type not RC or RELEASE.)
Fixed undefined behavior in pngvalid.c, undefined because
(png_byte) << shift is undefined if it changes the signed bit
(because png_byte is promoted to int). The libpng exported functions
png_get_uint_32 and png_get_uint_16 handle this. (Bug reported by
David Drysdale as a result of reports from UBSAN in clang 3.8).
This changes pngvalid to use BE random numbers; this used to produce
errors but these should not be fixed as a result of the previous changes.
In projects/vstudio, combined readme.txt and WARNING into README.txt
Relocated assert() in contrib/tools/pngfix.c, bug found by American
Fuzzy Lop, reported by Brian Carpenter.
Marked 'limit' UNUSED in transform_range_check(). This only affects
release builds.
Worked around a false-positive Coverity issue in pngvalid.c.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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or to glennrp at users.sourceforge.net
Glenn R-P