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181 Commits

Author SHA1 Message Date
John Bowler
209b3e4b79 [libpng16] Added output flushing to aid debugging under Visual Studio. 
This is necessary because the VS2010 output window otherwise simply loses
the error messages on error (they weren't flushed to the window before
the process exited, apparently!)
 2012-03-16 07:14:01 -05:00
John Bowler
845ee6af72 [libpng16] Fixed a compiler warning under Cygwin (Windows-7, 32-bit system) 2012-03-10 21:05:19 -06:00
John Bowler
9ff37ea94f [libpng16] Fix an off-by-one error in the palette index checking function. 2012-03-10 20:03:06 -06:00
John Bowler
1ffbe8c7c1 [libpng] Committed new contrib/libtests/makepng.c that was overlooked 
in a recent patch.
 2012-03-09 12:21:51 -06:00
John Bowler
d072048925 [libpng16] Correct pngvalid error message 2012-03-05 21:10:11 -06:00
John Bowler
7d4fbb2fbb [libpng16] Validate the zTXt strings in pngvalid. 2012-03-05 21:02:49 -06:00
John Bowler
e2ae0f2f2b [libpng16] Fix tarith argument parsing 2012-03-05 20:43:27 -06:00
John Bowler
d6cf3a3791 [libpng16] Added a print out of the maximum observed error to 'tarith ascii' 2012-03-05 20:41:19 -06:00
John Bowler
e741cd592e [libpng16] Added contrib/libtests/tarith.c to test internal arithmetic 
functions from png.c. This is a libpng maintainer program used to validate
changes to the internal arithmetic functions.
 2012-03-04 20:48:57 -06:00
Glenn Randers-Pehrson
434801a39c [libpng16] Bump version to 1.6.0beta16 2012-03-02 22:52:13 -06:00
John Bowler
6f237b6bf0 [libpng16] Remove whitespace at end of lines 2012-03-02 13:20:52 -06:00
John Bowler
a0ddf0b5f2 [libpng16] Minor update to pngstest.c, chmod 755 gentests.sh 2012-03-02 06:56:33 -06:00
John Bowler
cf49919686 [libpng16] Fixed some bugs in ICC profile writing. The code should now accept 
all potentially valid ICC profiles and reject obviously invalid ones.
It now uses png_error() to do so rather than casually writing a PNG
without the necessary color data.
 2012-03-01 21:54:07 -06:00
John Bowler
cb129a6234 [libpng16] Improved pngstest fine tuning of error numbers, new test file 
generator.  The generator generates images that test the full range of sample
values, allow the error numbers in pngstest to be tuned and checked.  makepng
also allows generation of images with extra chunks, although this is
still work-in-progress.
 2012-03-01 21:26:54 -06:00
John Bowler
dee7577330 [libpng16] Added PNG_IMAGE_FLAG_FAST for the benefit of applications that 
store intermediate files, or intermediate in-memory data, while processing
image data with the simplified API.  The option makes the files larger
but faster to write and read.  pngstest now uses this by default; this
can be disabled with the --slow option.
 2012-03-01 18:55:54 -06:00
John Bowler
1c25b9b06b [libpng16] Fixed transparent pixel and 16-bit rgb tests in pngstest and removed 
a spurious check in pngwrite.c
 2012-02-29 10:49:28 -06:00
John Bowler
0a92b23c4b [libpng16] Rewrote pngstest.c for substantial speed improvement. 2012-02-29 06:47:55 -06:00
Glenn Randers-Pehrson
df44c4c4d9 [libpng16] Imported from libpng-1.6.0beta13.tar 2012-02-24 11:45:34 -06:00
Glenn Randers-Pehrson
864270e18f [libpng16] Fixed a memory overwrite bug in simplified read of RGB PNG with 
Fixed a memory overwrite bug in simplified read of RGB PNG with
non-linear gamma Also bugs in the error checking in pngread.c and changed
quite a lot of the checks in pngstest.c to be correct; either correctly
written or not over-optimistic.  The pngstest changes are insufficient to
allow all possible RGB transforms to be passed; pngstest cmppixel needs
to be rewritten to make it clearer which errors it allows and then changed
to permit known inaccuracies.
 2012-02-10 17:13:13 -06:00
John Bowler
aa725a375c [libpng16] Corrected estimate of error in libpng png_set_rgb_to_gray API. 
The API is extremely inaccurate for sRGB conversions because it uses an 8-bit
intermediate linear value and it does not use the sRGB transform, so it
suffers from the known instability in gamma transforms for values close
to 0 (see Poynton).  The net result is that the calculation has a maximum
error of 14.99/255; 0.5/255^(1/2.2).  pngstest now uses 15 for the
permitted 8-bit error. This may still not be enough because of arithmetic
error.
 2012-02-04 15:11:16 -06:00
John Bowler
40ca77a721 [libpng16] Improved pngstest speed by not doing redundant tests and add const 
to the background parameter of png_image_finish_read. The --background
option is now done automagically only when required, so that commandline
option no longer exists.
 2012-01-28 23:19:42 -06:00
John Bowler
3a1d63dc69 [libpng16] Fixed Image::colormap misalignment in pngstest.c 2012-01-28 00:11:53 -06:00
Glenn Randers-Pehrson
dde1f98626 [libpng16] Committed 5 new or renamed files in contrib/pngsuite. 2012-01-27 20:35:35 -06:00
Glenn Randers-Pehrson
aaf1179ec1 [libpng16] Added two images to contrib/pngsuite (1-bit and 2-bit transparent 
grayscale), and renamed three whose names were inconsistent with those in
pngsuite/README.txt.
 2012-01-27 20:07:00 -06:00
John Bowler
8fb6c6a9b3 [libpng16] Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived) 
compiler issues slightly different warnings from those issued by the
current vesions of GCC. This eliminates those warnings by
adding/removing casts and small code rewrites.
 2012-01-25 07:47:44 -06:00
John Bowler
c35f888c46 [libpng16] Finish patching pngstest.c 2012-01-24 07:40:28 -06:00
Glenn Randers-Pehrson
edbcd02133 [libpng16] bump version to 1.6.0beta06 2012-01-16 07:50:01 -06:00
Glenn Randers-Pehrson
da1c5ca65a [libpng16] Imported from libpng-1.6.0beta05.tar 2012-01-14 20:44:14 -06:00
Glenn Randers-Pehrson
1531bd61a0 [libpng16] Updated copyright year to 2012 2012-01-01 14:45:04 -06:00
Glenn Randers-Pehrson
6e4184249c [libpng16] Imported from libpng-1.6.0beta04.tar 2011-12-29 21:01:01 -06:00
Glenn Randers-Pehrson
04ab33560f [libpng16] Revised contrib/pngminus/pnm2png.c to avoid warnings 
when png_uint_32 and unsigned long are of different sizes.
 2011-12-29 10:24:50 -06:00
John Bowler
d7c22fb7ec [libpng16] Added pngvalid.c compile time checks for const APIs. 2011-12-24 08:29:20 -06:00
Glenn Randers-Pehrson
28d9339777 [libpng16] Imported from libpng-1.6.0beta03.tar 2011-12-22 08:14:43 -06:00
John Bowler
681c1fc02a [libpng16] Correct configure builds where build and source directories are 
separate.  The include path of 'config.h' was erroneously made relative in
pngvalid.c in libpng 1.5.7.
 2011-12-18 06:20:22 -06:00
John Bowler
ba6fbc57ba [libpng16] Revised config.h handling; added bsconfig.h, deleted pngconfig.h 2011-12-17 14:21:54 -06:00
Glenn Randers-Pehrson
d1dceee2f7 [libpng] #include "pngconfig.h" in pngvalid.c 2011-12-17 10:21:51 -06:00
Glenn Randers-Pehrson
26aad85204 [libpng16] Imported from libpng-1.6.0beta01.tar 2011-12-15 10:31:17 -06:00
John Bowler
12924f33bd [libpng16] Fixed minor memset/sizeof errors in pngvalid.c. 2011-12-05 12:36:04 -06:00
Glenn Randers-Pehrson
6bdefdd977 [libpng] Fixed some trivial typos in the contrib/tools subdirectory. 2011-11-29 07:44:48 -06:00
John Bowler
405a398b3e [libpng16] New 'tools' directory containing tools used to generate libpng code. 2011-11-28 23:57:45 -06:00
John Bowler
414769b415 [libpng16] Add "free()" and "png_free_image()" calls to example code. 2011-11-27 21:39:13 -06:00
Glenn Randers-Pehrson
4c7e8208b6 [libpng16] Remove machine-generated configure files 2011-11-26 21:08:24 -06:00
John Bowler
baeb6d1e92 [libpng16] Added ANSI-C (C90) headers; eliminated the use of FAR/far. 2011-11-26 18:21:02 -06:00
Glenn Randers-Pehrson
2ddb252d07 [libpng16] Updated license info in contrib/examples and example.c 2011-11-25 07:27:51 -06:00
Glenn Randers-Pehrson
7455cbf47e [libpng16] Update internal version numbering and SO-numbers 2011-11-24 14:49:01 -06:00
Glenn Randers-Pehrson
5b79cd52f4 [libpng16] Moved pngvalid.c into contrib/libtests 
and rebuilt Makefile.in and configure, etc., with autoconf-2.68
 2011-11-24 10:56:20 -06:00
John Bowler
36082cffcd [libpng16] Added example programs for the new 'simplified' API. 2011-11-24 08:22:24 -06:00
Glenn Randers-Pehrson
3b1f03084e [libpng15] Fixed copyright, spelling in contrib/libtest and contrib/sRGBtables 2011-11-21 20:52:21 -06:00
Glenn Randers-Pehrson
e0bcbfd0fd [libpng15] Imported from libpng-1.5.7beta03.tar 2011-11-16 23:14:06 -06:00
John Bowler
76b0459fdd [libpng15] Updated contrib/sRGBtables code 2011-11-16 13:44:42 -06:00