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0a92b23c4b
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165 Commits

Author SHA1 Message Date
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
Glenn Randers-Pehrson
ae41dc55a2 [libpng15] Added contrib/README.txt 2011-11-16 13:35:16 -06:00
John Bowler
89c2f84287 [libpng15] Fix Windows builds, add pngstest to Visual Studio and OpenWatcom 2011-11-16 12:04:39 -06:00
John Bowler
ed9f84475d [libpng15] Update pngstest to remove compiler warnings, add to libpng tests 2011-11-16 11:52:27 -06:00
John Bowler
1eb188932b [libpng15] Added contrib/pngtests 2011-11-16 11:40:59 -06:00
Glenn Randers-Pehrson
816e687de8 [libpng] Added copyright and licensing info to contrib/sRGBtables/*.c 2011-11-11 18:48:04 -06:00
John Bowler
0a521d3785 [libpng15] Installed more accurate linear to sRGB conversion tables. 
The slightly modified tables reduce the number of 16-bit values that
convert to an off-by-one 8-bit value.  The "makesRGB.c" code that was used
to generate the tables is now in a contrib/sRGBtables sub-directory.
 2011-11-11 18:14:59 -06:00
Glenn Randers-Pehrson
7342fcaf92 [libpng] #define PNG_ALIGN_TYPE PNG_ALIGN_NONE in contrib/pngminim/*/pngusr.h 2011-10-27 19:56:36 -05:00
Glenn Randers-Pehrson
435cf87469 [libpng15] Bump version to libpng-1.5.6beta04 2011-10-05 16:42:16 -05:00
Glenn Randers-Pehrson
ef43c17bfe [devel] Changed "// ..." comments to "/* .. */" in the visupng project. 2011-09-03 09:53:07 -05:00
Glenn Randers-Pehrson
4164c6f949 [devel] Reverted non-portable GNU syntax in makefile (?=, +=) 2011-07-12 06:11:42 -05:00
Glenn Randers-Pehrson
4b2237a6a4 [devel] Updated contrib/pngminus/makefile.std 2011-07-11 17:52:05 -05:00
Glenn Randers-Pehrson
581d29d4c9 [devel] Removed redundant directives from pngminim/*/*dfa. 2011-06-17 21:44:10 -05:00
Glenn Randers-Pehrson
fb29e51dbd [devel] Imported from libpng-1.5.4beta05.tar 2011-06-17 20:42:19 -05:00
Glenn Randers-Pehrson
850769f787 [devel] Revised contrib/visupng, gregbook, and pngminim 
to demonstrate chop_16_to_8
 2011-06-16 09:08:53 -05:00
Glenn Randers-Pehrson
af855e415d [devel] Remove some trailing blanks. 2011-05-07 10:54:28 -05:00
Glenn Randers-Pehrson
3f2339b551 [devel] removed "strip" from contrib/pngminim/*/makefile 2011-03-19 22:32:38 -05:00