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[libpng16] Worked around rgb-to-gray issues in libpng 1.6. The previous

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attempts to ignore the errors in the code aren't quite enough to
deal with the 'channel selection' encoding added to libpng 1.7; abort.
This commit is contained in:
Glenn Randers-Pehrson 2015-09-26 21:31:53 -05:00
parent 068cb3a64c
commit f9e37f54eb
3 changed files with 12 additions and 3 deletions
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7
ANNOUNCE
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@ -1,4 +1,4 @@
Libpng 1.6.19beta04 - September 26, 2015 Libpng 1.6.19beta04 - September 27, 2015
This is not intended to be a public release. It will be replaced 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. within a few weeks by a public version or by another test version.
@ -92,7 +92,10 @@ Version 1.6.19beta03 [September 26, 2015]
warning, updated pngstest-errors.h for the errors detected with the warning, updated pngstest-errors.h for the errors detected with the
new contrib/testspngs PNG test files (John Bowler). new contrib/testspngs PNG test files (John Bowler).
Version 1.6.19beta04 [September 26, 2015] Version 1.6.19beta04 [September 27, 2015]
Worked around rgb-to-gray issues in libpng 1.6. The previous
attempts to ignore the errors in the code aren't quite enough to
deal with the 'channel selection' encoding added to libpng 1.7; abort.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit

6
CHANGES
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@ -5375,7 +5375,11 @@ Version 1.6.19beta03 [September 26, 2015]
warning, updated pngstest-errors.h for the errors detected with the warning, updated pngstest-errors.h for the errors detected with the
new contrib/testspngs PNG test files (John Bowler). new contrib/testspngs PNG test files (John Bowler).
Version 1.6.19beta04 [September 26, 2015] Version 1.6.19beta04 [September 27, 2015]
Worked around rgb-to-gray issues in libpng 1.6. The previous
attempts to ignore the errors in the code aren't quite enough to
deal with the 'channel selection' encoding added to libpng 1.7; abort.
pngvalid.c is changed to drop this encoding in prior versions.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit

2
contrib/libtests/pngvalid.c
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@ -10960,11 +10960,13 @@ static const color_encoding test_encodings[] =
/*red: */ { 0.716500716779386, 0.258728243040113, 0.000000000000000 }, /*red: */ { 0.716500716779386, 0.258728243040113, 0.000000000000000 },
/*green:*/ { 0.101020574397477, 0.724682314948566, 0.051211818965388 }, /*green:*/ { 0.101020574397477, 0.724682314948566, 0.051211818965388 },
/*blue: */ { 0.146774385252705, 0.016589442011321, 0.773892783545073} }, /*blue: */ { 0.146774385252705, 0.016589442011321, 0.773892783545073} },
#if PNG_LIBPNG_VER >= 10700
/* Fake encoding which selects just the green channel */ /* Fake encoding which selects just the green channel */
/*gamma:*/ { 1.45/2.2, /* the 'Mac' gamma */ /*gamma:*/ { 1.45/2.2, /* the 'Mac' gamma */
/*red: */ { 0.716500716779386, 0.000000000000000, 0.000000000000000 }, /*red: */ { 0.716500716779386, 0.000000000000000, 0.000000000000000 },
/*green:*/ { 0.101020574397477, 1.000000000000000, 0.051211818965388 }, /*green:*/ { 0.101020574397477, 1.000000000000000, 0.051211818965388 },
/*blue: */ { 0.146774385252705, 0.000000000000000, 0.773892783545073} }, /*blue: */ { 0.146774385252705, 0.000000000000000, 0.773892783545073} },
#endif
}; };
/* signal handler /* signal handler