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Author SHA1 Message Date
John Bowler
28a1cdfc2e Fix inconsistent handling of invalid zlib data 
In libpng 1.6 zlib initialization was changed to use the window size in the zlib
stream, not a fixed value.  This causes some invalid images, ones where CINFO is
too large, to display 'correctly' if the rest of the data is valid.  This
provides a work-round for zlib versions where the error arises (ones that
support the API change to use the window size in the stream).

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-11-27 23:57:39 -08:00
Glenn Randers-Pehrson
87049cbf84 [libpng16] Update CHANGES, ANNOUNCE, minor editing of contrib/*/*.c 2015-11-25 15:55:01 -06:00
Glenn Randers-Pehrson
19ffb62903 [libpng16] Update CHANGES and ANNOUNCE about pngfix.c 2015-11-25 15:25:40 -06:00
John Bowler
f5778c8fbb Fix error in handling of bad zlib CMINFO field 
Signed-off-by: John Bowler <jbowler@acm.org>
 2015-11-25 12:59:42 -08:00
Glenn Randers-Pehrson
92ec30a3b1 [libpng16] Imported from libpng-1.6.20beta03.tar 2015-11-24 09:34:02 -06:00
John Bowler
8a08b6457a Test backport 
Tests backported from the multi-version compatible ones in libpng 1.7

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-11-23 20:15:51 -08:00
Glenn Randers-Pehrson
9a2065c5ee [libpng16] Imported from libpng-1.6.20beta02.tar 2015-11-23 09:29:44 -06:00
Glenn Randers-Pehrson
27f08ac11d [lbpng16] Revert 12 -> 12U change in pngrutil.c 2015-11-22 22:59:47 -06:00
Glenn Randers-Pehrson
0a9afc12de [libpng16] Fixed bug recently introduced in png_set_PLTE() that uses png_ptr 
not info_ptr.
 2015-11-22 20:53:02 -06:00
Glenn Randers-Pehrson
a1a2ae2a25 [libpng16] Bump version to 1.6.20beta02 2015-11-22 14:11:29 -06:00
Glenn Randers-Pehrson
26942c818e [libpng16] Imported from libpng-1.6.20beta01.tar 2015-11-22 14:08:52 -06:00
Glenn Randers-Pehrson
8ba160ba94 [libpng16] Use unsigned constants in buffer length comparisons 2015-11-21 14:31:59 -06:00
John Bowler
1ceedd0bf6 [libpng16] Another whack at png_handle_sPLT() pointer calculation. 2015-11-19 20:45:08 -06:00
Viktor Szakats
4db6127658 pngread: avoid clang warning for unreachable code 
```
pngread.c:2841:10: warning: 'break' will never be executed [-Wunreachable-code-break]
         break;
         ^~~~~
```
 2015-11-19 19:54:01 +01:00
Glenn Randers-Pehrson
c4b2282fee [libpng16] Removed new redundant check for length < 12 in pngrutil.c 2015-11-17 16:36:06 -06:00
Glenn Randers-Pehrson
001513c9ca [libpng16] Removed new redundant check for libpng < 12 in pngrutil.c 2015-11-17 16:23:51 -06:00
Glenn Randers-Pehrson
162f9f87f9 [libpng16] Remove newly-added useless typecasts. 2015-11-16 09:23:25 -06:00
Glenn Randers-Pehrson
9965f63a44 [libpng16] Changed size_t to png_uint_32 in new buffer checks (John Bowler) 2015-11-15 15:27:22 -06:00
Glenn Randers-Pehrson
070a0eb58f [libpng16] Revised recent pngrutil.c patch as suggested by pascal 2015-11-14 16:45:26 -06:00
Glenn Randers-Pehrson
0b4e7deab1 [libpng16] Avoid potential pointer overflow in png_handle_sPLT() and 
png_handle_pCAL() (Bug report by John Regehr).
 2015-11-13 11:05:27 -06:00
Glenn Randers-Pehrson
f1cdf4e1ca [libpng16] Bump version to 1.6.20beta01 2015-11-13 10:18:18 -06:00
Glenn Randers-Pehrson
415d26805a [libpng16] Imported from libpng-1.6.19.tar 2015-11-12 07:13:31 -06:00
Glenn Randers-Pehrson
83f4c735c8 [libpng16] Clean up coding style in png_handle_PLTE() 2015-11-05 11:18:44 -06:00
Glenn Randers-Pehrson
64fef09b67 [libpng16] Imported from libpng-1.6.19rc04.tar 2015-11-05 06:59:34 -06:00
Glenn Randers-Pehrson
9f2ad4928e [libpng16] Fixed new bug with CRC error after reading an over-length palette. 2015-11-04 23:47:42 -06:00
Glenn Randers-Pehrson
0e30044094 [libpng16] Imported from libpng-1.6.19rc03.tar 2015-11-03 09:57:01 -06:00
Glenn Randers-Pehrson
fc8450833a [libpng16] Clarified COPYRIGHT information to state explicitly that versions 
are derived from previous versions.
Removed much of the long list of previous versions from png.h and
    libpng.3.
 2015-11-03 08:24:56 -06:00
Glenn Randers-Pehrson
6761aacbfa [libpng16] Bump version to 1.6.19rc03 2015-11-03 08:15:06 -06:00
Glenn Randers-Pehrson
408dbac801 [libpng16] Fixed some inconsequential cut-and-paste typos 
in png_set_cHRM_XYZ_fixed().
 2015-11-01 12:38:33 -06:00
Glenn Randers-Pehrson
b00d986d54 [libpng16] Imported from libpng-1.6.19rc02.tar 2015-10-31 09:04:18 -05:00
Glenn Randers-Pehrson
305ada6672 Merge branch 'libpng16' of https://github.com/jbowler/libpng-1 into libpng16 2015-10-30 12:48:07 -05:00
Glenn Randers-Pehrson
1bef8e9799 [libpng16] Silently truncate over-length PLTE chunk while reading. 2015-10-30 11:34:37 -05:00
Glenn Randers-Pehrson
a901eb3ce6 [libpng16] Prevent reading over-length PLTE chunk (Cosmin Truta). 2015-10-30 07:57:49 -05:00
John Bowler
896c3cfb76 rowbytes check correction 
The old code incorrectly calculated the output rowbytes when the
application decreased either the number of channels or the bit depth (or
both) in a user transform.  This was safe; libpng overallocated buffer
space (potentially by quite a lot; up to 4 times the amount required)
but, from 1.5.4 on, resulted in a png_error.

Signed-off-by: John Bowler <jbowler@acm.org>
 2015-10-29 18:16:48 -07:00
Glenn Randers-Pehrson
06509be841 [libpng16] Bump version to 1.6.19rc02 2015-10-29 09:28:33 -05:00
Glenn Randers-Pehrson
81f44665cc [libpng16] Reject attempt to write over-length PLTE chunk 2015-10-29 09:26:41 -05:00
Glenn Randers-Pehrson
9c7ed35a65 [libpng16] Imported from libpng-1.6.19rc01.tar 2015-10-23 09:30:20 -05:00
Glenn Randers-Pehrson
05e81e18d2 [libpng16] Bump version to 1.6.19beta05 2015-10-14 22:25:29 -05:00
Glenn Randers-Pehrson
6ca8ee1518 [libpng16] Imported from libpng-1.6.19beta04.tar 2015-10-14 22:25:21 -05:00
Glenn Randers-Pehrson
59e655b020 [libpng16] Added sPLT support to pngtest.c 2015-10-10 12:05:55 -05:00
Glenn Randers-Pehrson
5bd9d66098 [libpng16] Updated CHANGES and ANNOUNCE 2015-10-03 15:16:53 -05:00
John Bowler
2163c930b0 pow and sbit fixes backported to pngvalid from 1.7 
Signed-off-by: John Bowler <jbowler@acm.org>
 2015-10-03 11:14:43 -07:00
John Bowler
18f0bd1d63 Merge remote-tracking branch 'local/libpng16' into libpng16 2015-09-27 08:52:50 -07:00
Glenn Randers-Pehrson
5b9c044332 Revert "[libpng16] Fix bad merge of contrib/libtests/pngvalid.c" 
This reverts commit 9517f7b636.
 2015-09-27 09:17:45 -05:00
John Bowler
dc3069bcb1 Merge branch 'libpng16' into libpng16-pngvalid-rgb-to-gray-digitize-issues 2015-09-26 21:29:06 -07:00
Glenn Randers-Pehrson
9517f7b636 [libpng16] Fix bad merge of contrib/libtests/pngvalid.c 2015-09-26 23:11:15 -05:00
Glenn Randers-Pehrson
b77d929217 [libpng16] Restored Makefile.am and configure.ac (they had been 
inadvertently replaced with libpng17 versions).
 2015-09-26 22:54:51 -05:00
Glenn Randers-Pehrson
b939ce06be [libpng17] Makefile.am and configure.ac were out of date. 2015-09-26 22:26:44 -05:00
Glenn Randers-Pehrson
f9e37f54eb [libpng16] 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.
 2015-09-26 21:31:53 -05:00
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