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216 Commits

Author SHA1 Message Date
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
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
Glenn Randers-Pehrson
eceff8b3c3 [devel] Added a hint to try CPP=/bin/cpp if "cpp -E" fails in 
scripts/pnglibconf.mak and in contrib/pngminim/*/makefile and to try
"STRIP=touch" if strip is missing, eg., on SunOS 5.10
 2011-03-19 14:49:03 -05:00
Glenn Randers-Pehrson
eb7d7955e5 Updated contrib/pngsuite/README to add the word "modify". 2011-02-27 21:19:23 -06:00
Glenn Randers-Pehrson
64b863cd2a [devel] Update copyright year and bump to version libpng-1.5.0rc07 2011-01-04 09:58:33 -06:00
Glenn Randers-Pehrson
fded04fbf6 [devel] Revised pngvalid.c 16-to-8-big conversion tests 2010-08-27 14:21:21 -05:00
Glenn Randers-Pehrson
0c57414490 [devel] Added "option READ_16_TO_8 on" to contrib/pngminim/decoder/pnglibconf.dfa 
and contrib/pngminim/preader/pnglibconf.dfa
 2010-08-27 09:37:06 -05:00
Glenn Randers-Pehrson
c97cf70bc7 [devel] Remove unnecessary defines from contrib/pngminim/*/pngusr.h 2010-08-24 21:22:27 -05:00
Glenn Randers-Pehrson
a313751258 [devel] Removed spurious tabs, shorten long lines (no source change) 
Also added scripts/chkfmt to validate the format of all the files that can
reasonably be validated (it is suggested to run "make distclean" before
checking, because some machine generated files have long lines.)
Reformatted the CHANGES file to be more consistent throughout.
 2010-08-18 20:25:36 -05:00
Glenn Randers-Pehrson
9f65059a5b [devel] Don't try to use version-script with cygwin/mingw. 
Revised contrib/gregbook to work under cygwin/mingw.
 2010-08-11 08:06:11 -05:00
Glenn Randers-Pehrson
dbe0c9d8c7 [devel] Use FIXED_POINT in contrib/pngminim/decoder and encoder 2010-07-29 20:28:36 -05:00
Glenn Randers-Pehrson
11a5687b72 [devel] Removed reference to pngarith from contrib/pngminim/preader/makefile. 2010-07-29 19:27:26 -05:00
Glenn Randers-Pehrson
31aee0d0c0 [devel] 
Fixed point APIs are now supported throughout (no missing APIs).
  Internal fixed point arithmetic support exists for all internal floating
    point operations.
  sCAL validates the floating point strings it is passed.
  Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2
  Two new APIs exist to get the number of passes without turning on the
    PNG_INTERLACE transform and to get the number of rows in the current
    pass.
  A new test program, pngvalid.c, validates the gamma code.
  Errors in the 16 bit gamma correction (overflows) have been corrected.
  cHRM chunk testing is done consistently (previously the floating point
    API bypassed it, because the test really didn't work on FP, now the test
    is performed on the actual values to be stored in the PNG file so it
    works in the FP case too.)
  Most floating point APIs now simply call the fixed point APIs after
    converting the values to the fixed point form used in the PNG file.
  The standard headers no longer include zlib.h, which is currently only
    required for pngstruct.h and can therefore be internal.
  (Patches by John Bowler)
 2010-07-29 17:39:14 -05:00
Glenn Randers-Pehrson
289500ab8d [devel] Imported from libpng-1.5.0beta33.tar 2010-06-28 20:21:22 -05:00
Glenn Randers-Pehrson
73e28ef13d [devel] Reverted changes to call png_longjmp in contrib/gregbook 
where it is not appropriate.  If mainprog->jmpbuf is used by setjmp,
then png_longjmp cannot be used.
Reversed patch to remove error handler when the jmp_buf is stored in the
main program structure, not the png_struct.
The error handler is needed because the default handler in libpng will
always use the jmp_buf in the library control structure; this is never
set.  The gregbook code is a useful example because, even though it
uses setjmp/longjmp, it shows how error handling can be implemented
using control mechanisms not directly supported by libpng.  The
technique will work correctly with mechanisms such as Microsoft
Structure Exceptions or C++ exceptions (compiler willing - note that gcc
does not by default support interworking of C and C++ error handling.)
 2010-06-28 20:19:57 -05:00
Glenn Randers-Pehrson
5feb87cd0e [devel] Imported from libpng-1.5.0beta29.tar 2010-06-25 20:06:38 -05:00
Glenn Randers-Pehrson
53c07f5909 [devel] Imported from libpng-1.5.0beta25.tar 2010-06-25 20:06:28 -05:00
Glenn Randers-Pehrson
1f1becf87f [devel] Fix a spelling typo in the contrib/pngminim makefiles 2010-04-29 09:47:12 -05:00
Glenn Randers-Pehrson
b621794ed5 [devel] Removed contrib/pngminim/*/gather.sh 
Source file gathering is now done in the makefile.
 2010-04-29 08:41:33 -05:00
Glenn Randers-Pehrson
a0b0d8b9db [devel] Removed dummy_inflate.c from contrib/pngminim/encoder 2010-04-29 08:40:24 -05:00
Glenn Randers-Pehrson
1ce8133282 [devel] Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED 
to PNG_HANDLE_AS_UNKNOWN_SUPPORTED in gregbook/readpng2.c
 2010-04-28 18:44:48 -05:00
Glenn Randers-Pehrson
b7e1abe25c [devel] Removed extraneous contrib/pngminim/pngusr.h 2010-04-28 08:08:18 -05:00
Glenn Randers-Pehrson
d24a6b5fd0 [devel] Imported from libpng-1.5.0beta22.tar 2010-04-28 08:03:42 -05:00
Glenn Randers-Pehrson
e3e8f6bf02 [devel] Revised contrib/pngminim to use the "everything off" option 
in pngusr.dfa.
 2010-04-28 07:54:14 -05:00
Glenn Randers-Pehrson
d026f9cce6 [devel] Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in 
contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
 2010-04-26 22:48:39 -05:00
Glenn Randers-Pehrson
b56e0d06f9 [devel] Imported from libpng-1.5.0beta19.tar 2010-04-24 12:17:49 -05:00
Glenn Randers-Pehrson
5623f781bc [devel] Imported from libpng-1.5.0beta18.tar 2010-04-17 19:09:22 -05:00
Glenn Randers-Pehrson
7efdbaf320 [devel] Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to 
save some space.
 2010-04-17 18:50:23 -05:00
Glenn Randers-Pehrson
98eb24c726 [devel] Updated contrib/pngminim project to work with the new pnglibconf.h 2010-04-17 18:07:33 -05:00
Glenn Randers-Pehrson
8c065ddbe6 [devel] Revised contrib/pngminim/decoder to build and use pnglibconf.h 2010-04-17 12:40:12 -05:00
Glenn Randers-Pehrson
6ff9ec81c5 [devel] Attempt to get contrib/pngminim working with new pnglibconf.h 
not quite working yet (pow is undefined)
 2010-04-17 11:53:38 -05:00
Glenn Randers-Pehrson
8027fed7d1 [devel] Imported from libpng-1.5.0beta17.tar 2010-04-17 08:58:29 -05:00
Glenn Randers-Pehrson
3cd7cffd0c [devel] Imported from libpng-1.5.0beta17.tar 2010-04-16 19:28:42 -05:00
Glenn Randers-Pehrson
b92e2f7335 [devel] Expanded TAB characters in contrib/pngminus 2010-03-15 09:48:37 -05:00
Glenn Randers-Pehrson
42928551cf [devel] Expanded TAB character in contrib/gregbook/rpng-x.c and rpng2-x.c 2010-03-15 08:38:06 -05:00
Glenn Randers-Pehrson
86f88ddd53 [devel] Imported from libpng-1.5.0beta12.tar 2010-03-08 21:31:46 -06:00
Glenn Randers-Pehrson
65a223794a [devel] Bump to version libpng-1.5.0beta11 2010-03-03 05:39:36 -06:00
Glenn Randers-Pehrson
d259e6c570 [devel] Revised png_longjmp() calls in contrib/gregbook to use png_ptr 2010-02-21 23:36:35 -06:00
Glenn Randers-Pehrson
4531ded5c1 [devel] Removed unused gzio.c from contrib/pngminim gather and makefile scripts 
This is necessary when libz is upgraded to 1.2.4
 2010-02-21 23:07:13 -06:00
Glenn Randers-Pehrson
f98726ae98 [devel] Added exported png_longjmp() function. 2010-02-19 09:54:53 -06:00
Glenn Randers-Pehrson
946199e8e4 [devel] Removed obsolete unused MMX-querying support from contrib/gregbook 2010-02-19 07:57:34 -06:00
Glenn Randers-Pehrson
f1eb918dc8 [devel] Imported from libpng-1.5.0beta03.tar 2010-02-08 15:42:16 -06:00
Glenn Randers-Pehrson
e3f3c4ea0b [devel] Imported from libpng-1.5.0beta01.tar 2010-02-07 18:10:43 -06:00
Glenn Randers-Pehrson
3da965ce4b [devel] Removed leftover "-DPNG_CONFIGURE_LIBPNG" 
from contrib/pngminim/*/makefile
 2009-12-11 07:56:25 -06:00
Glenn Randers-Pehrson
d88da23cbd [devel] Added dependency on pngpriv.h in contrib/pngminim/*/makefile 2009-11-09 13:34:10 -06:00
Glenn Randers-Pehrson
d5513a7490 [devel] Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c 2009-11-09 11:28:15 -06:00
Glenn Randers-Pehrson
3d7e15f353 [devel] Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c 2009-11-09 11:05:40 -06:00
Glenn Randers-Pehrson
ec3f949874 [devel] Fixed some deprecated usages in the contrib directory. 2009-11-09 10:49:12 -06:00
Glenn Randers-Pehrson
3243fea0ac [devel] Remove scripting cruft in contrib/pngminim/*/pngusr.h 2009-09-24 18:05:22 -05:00
Glenn Randers-Pehrson
b380515c84 [devel] Removed references to PNG_NO_GLOBAL_ARRAYS 
from contrib/visupng and contrib/pngminim sources.
 2009-08-31 14:50:08 -05:00
Glenn Randers-Pehrson
77d0cdef02 [devel] Imported from libpng-1.4.0beta78.tar 2009-08-31 11:22:08 -05:00