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04402a9126
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365 Commits

Author SHA1 Message Date
John Bowler
04402a9126 Fix (work round) 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.

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-09-26 17:41:02 -07:00
John Bowler
956f295d48 Merge remote-tracking branch 'local/libpng16' into libpng16 2015-09-25 16:58:43 -07:00
Glenn Randers-Pehrson
61257bc2de [libpng16] Update CHANGES and ANNOUNCE 2015-09-25 18:25:08 -05:00
John Bowler
6297297708 Enable low-bit-depth gray tests in pngvalid 
Signed-off-by: John Bowler <jbowler@acm.org>
 2015-09-25 16:21:45 -07:00
John Bowler
fd42ef9b06 pngstest 1.6 error limit and warning revisions 
Remove the '--strict' in 1.6 because of the double-gamma-correction warning,
update pngstest-errors.h for the errors detected with the new contrib/testspngs
PNG test files.

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-09-25 13:40:18 -07:00
John Bowler
a2671a7f49 test PNG files (contrib/testpngs) 
Back ported from libpng 1.7

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-09-25 13:10:13 -07:00
Glenn Randers-Pehrson
01a0e8062d [libpng16] Reverted addition of png_set_filler_16 and png_set_add_alpha_16() 
functions. They unnecessarily duplicate png_set_filler() and png_set_add_alpha()
which now work properly with 16-bit images.
 2015-09-24 22:39:53 -05:00
Glenn Randers-Pehrson
efe4e5d10d [libpng16] Reverted the fix of byte order in png_do_read_filler() with 16-bit 
input that was made in version 1.6.17beta01, to preserve legacy
behavior even though it was incorrect.  Instead, added new API
png_set_filter_16() and png_set_add_alpha_16() that set a flag to
make png_do_read_filter() interpret the filler bytes properly.
 2015-09-23 22:08:04 -05:00
John Bowler
d6eb4b71ac Updated pngstest-errors.h 
This update incorporates errors resulting from the more extensive image test
suite used in libpng 1.7

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-09-20 20:59:10 -07:00
Glenn Randers-Pehrson
4c9c43d4d4 [libpng16] Added license info to pngstest-errors.h and its generator. 2015-09-19 20:17:44 -05:00
Glenn Randers-Pehrson
0cc11b86ba [libpng16] Update ANNOUNCE and CHANGES with recent pngstest updates. 2015-09-19 19:57:59 -05:00
John Bowler
93b4568fc0 pngstest: make error limits version specific 
Splitting the machine generated error structs out to a file allows the values to
be updated without changing pngstest.c itself, since libpng 1.6 and 1.7 have
slightly different error limits this simplifies maintenance.

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-09-19 16:34:30 -07:00
Glenn Randers-Pehrson
8bfcb4c7a7 [libpng16] Copied contrib/libtests/pngvalid.c from libpng17. 2015-09-18 14:24:49 -05:00
Glenn Randers-Pehrson
eb0bf4f468 [libpng16] Updated pngvalid.c with recent changes from libpng17 2015-09-18 13:09:57 -05:00
John Bowler
e8c554661c Back-port pngvalid corrections and enhancements 
This is a patch for libpng16.
It incorporates fixes to the low-bit-depth gray background handling from
libpng17 and turns one of the low-bit-depth gray cases that does work (and,
indeed, did work before) in libpng16

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-09-17 07:56:30 -07:00
John Bowler
c3e7e7d715 [libpng16] tests backported from libpng 1.7 
This updates libpng16 with all the test changes from libpng17,
including changes to pngvalid.c to ensure that the original,
distributed, version of contrib/visupng/cexcept.h can be used.

pngvalid contains the correction to the use of SAVE/STORE_
UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7.  More
tests contain the --strict option to detect warnings and the
pngvalid-standard test has been corrected so that it does not
turn on progresive-read (there is a separate test which does
that.)

Some signed/unsigned fixes have been made.

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-09-15 15:38:52 -07:00
Glenn Randers-Pehrson
1e16e8829d [libpng16] Fix typo (extra "*/") in contrib/libtests/fakepng.c 2015-09-15 17:07:34 -05:00
Glenn Randers-Pehrson
4c02a5930a [libpng16] Imported from libpng-1.6.19beta02.tar 2015-08-19 12:58:14 -05:00
Glenn Randers-Pehrson
8b83ff3704 [libpng16] Change "n bit" to "n-bit" in comments. 2015-08-13 20:57:18 -05:00
Glenn Randers-Pehrson
67806d44c1 [libpng16] Imported from libpng-1.6.19beta01.tar 2015-07-30 11:18:15 -05:00
Glenn Randers-Pehrson
8510247b5f [libpng16] Fixed uninitialized variable in contrib/gregbook/rpng2-x.c and 
fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c
 2015-07-30 11:16:29 -05:00
Glenn Randers-Pehrson
e6172809bd [libpng16] Imported from libpng-1.6.18.tar 2015-07-22 22:40:52 -05:00
Glenn Randers-Pehrson
a390897ba4 [libpng16] Fixed a new signed-unsigned comparison in pngrtran.c (Max Stepin). 
Removed some useless typecasts from contrib/tools/png-fix-itxt.c
 2015-07-01 14:06:39 -05:00
Glenn Randers-Pehrson
9d4ea3014b [libpng16] Imported from libpng-1.6.18beta08.tar 2015-06-30 10:54:44 -05:00
Glenn Randers-Pehrson
c6f629ffdd [libpng16] Unlink temporary file immediately in pngstest (PNG_USE_MKSTEMP) 2015-06-11 16:28:54 -05:00
Glenn Randers-Pehrson
f6e7551f06 [libpng16] Eliminated the final two Coverity defects (insecure temporary file 
handling in contrib/libtests/pngstest.c; possible overflow of
unsigned char in contrib/tools/png-fix-itxt.c). To use the "secure"
file handling, define PNG_USE_MKSTEMP, otherwise "tmpfile()" will
continue to be used.
 2015-06-10 07:05:18 -05:00
Glenn Randers-Pehrson
867f2ec058 [libpng16] Imported from libpng-1.6.18beta07.tar 2015-06-06 17:03:14 -05:00
Glenn Randers-Pehrson
b26b51d154 [libpng16] Quieted Coverity issues in pngfix.c, png-fix-itxt.c, pngvalid.c, 
pngstest.c, and pngimage.c. Most seem harmless, but png-fix-itxt
would only work with iTXt chunks with length 255 or less.
 2015-06-03 16:07:01 -05:00
Glenn Randers-Pehrson
f50b593ac0 [libpng16] Update revision information in cexcept.h as required by the license. 2015-06-03 15:41:46 -05:00
John Bowler
b780eba4e4 [libpng16] Fixed cexcept.h in which GCC 5 now reports that one of the auto 
variables in the Try macro needs to be volatile to prevent value
being lost over the setjmp.
 2015-06-03 14:46:34 -05:00
Glenn Randers-Pehrson
b66de48b3b [libpng16] Changed png_voidcast(), etc., to voidcast(), etc., in 
contrib/tools/pngfix.c to avoid confusion with the libpng private macros.
 2015-05-30 22:57:33 -05:00
Glenn Randers-Pehrson
d8d18fbb02 [libpng16] Imported from libpng-1.6.18beta03.tar 2015-05-06 16:39:31 -05:00
John Bowler
74428df2fd [libpng16] Improved DIV65535 algorithm in simpleover.c. By experiment, 
(x + (x>>16) + 32769) works as well as the previous form and avoids one shift.
 2015-05-06 11:41:17 -05:00
Glenn Randers-Pehrson
d6b1375bf5 [libpng16] Trivial editing of comments in contrib/examples/simpleover.c 2015-05-04 20:25:31 -05:00
John Bowler
0f12df19a1 [libpng16] Added PNG generation tool, fixed unitialized pointer in 
simpleover. Also added a comment to png.h pointing out that the pointer must
 be set to NULL!  (simpleover crashes with any slightly complex command lines
 without this fix.)
 2015-05-04 19:58:41 -05:00
John Bowler
cde3078963 [libpng16] Added contrib/examples/simpleover.c, to demonstrate how to handle 
alpha compositing of multiple images, using the "simplified API"
 2015-05-02 19:53:40 -05:00
John Bowler
a21a5b22c1 [libpng16] Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c 2015-03-30 21:38:31 -05:00
Glenn Randers-Pehrson
218a6fe9e5 [libpng16] Bump version to 1.6.18beta01 2015-03-26 08:55:25 -05:00
Glenn Randers-Pehrson
c98f7fb4e3 [libpng16] Imported from libpng-1.6.17.tar 2015-03-26 08:11:12 -05:00
Glenn Randers-Pehrson
bc27b2f432 [libpng16] Imported from libpng-1.6.17rc02.tar 2015-03-09 09:20:46 -05:00
Glenn Randers-Pehrson
494e75ac83 [libpng16] Fixed some typos in the pngfix usage message. 2015-02-26 10:39:13 -06:00
Glenn Randers-Pehrson
018b4fccb9 [libpng16] Happy New Year! Update copyright year. 2014-12-31 18:45:23 -06:00
John Bowler
b6788ccaff [libpng16] Implement previously untested libpng transforms in pngvalid.c 2014-12-29 16:31:58 -06:00
John Bowler
19ec55f40e [libpng16] Added testing of png_set_packing() to pngvalid.c 2014-12-27 19:10:04 -06:00
John Bowler
6a6eb354ff [libpng16] Removed user limits from pngfix. Also pass NULL pointers to 
png_read_row to skip the unnecessary row de-interlace stuff.
 2014-12-24 18:54:08 -06:00
Glenn Randers-Pehrson
ecd074945c [libpng16] Bump version to 1.6.17beta01 2014-12-21 22:56:42 -06:00
Glenn Randers-Pehrson
88dd30b232 [libpng16] Imported from libpng-1.6.16.tar 2014-12-21 21:53:00 -06:00
Glenn Randers-Pehrson
f43b5e3709 [libpng16] Imported from libpng-1.6.16beta03.tar 2014-12-20 19:21:32 -06:00
John Bowler
a00ea0aeae [libpng16] Quiet a "comparison always true" warning in pngstest.c (John Bowler). 2014-12-16 19:18:06 -06:00
Glenn Randers-Pehrson
86a7eef997 [libpng16] Imported from libpng-1.6.16beta01.tar 2014-12-14 12:38:35 -06:00