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[libpng16] Update CHANGES and ANNOUNCE

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This commit is contained in:
Glenn Randers-Pehrson 2015-12-17 20:51:13 -06:00
parent 18765d0032
commit 42b438b7dc
3 changed files with 19 additions and 5 deletions
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11
ANNOUNCE
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@ -1,4 +1,4 @@
Libpng 1.6.21beta03 - December 15, 2015
Libpng 1.6.21beta03 - December 18, 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.
@ -38,11 +38,18 @@ Version 1.6.21beta02 [December 14, 2015]
statics) and a fix for the case in rgb_to_gray when the digitize option
reduces graylo to 0, producing a large error.
Version 1.6.21beta03 [December 15, 2015]
Version 1.6.21beta03 [December 18, 2015]
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.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

11
CHANGES
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@ -5459,11 +5459,18 @@ Version 1.6.21beta02 [December 14, 2015]
statics) and a fix for the case in rgb_to_gray when the digitize option
reduces graylo to 0, producing a large error.
Version 1.6.21beta03 [December 15, 2015]
Version 1.6.21beta03 [December 18, 2015]
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.)
(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.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

2
contrib/libtests/pngvalid.c
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@ -1,7 +1,7 @@
/* pngvalid.c - validate libpng by constructing then reading png files.
*
* Last changed in libpng 1.6.21 [(PENDING RELEASE)]
* Last changed in libpng 1.5.27 [(PENDING RELEASE)]
* Copyright (c) 2014-2015 Glenn Randers-Pehrson
* Written by John Cunningham Bowler
*