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314ef3e72b
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798 Commits

Author SHA1 Message Date
Glenn Randers-Pehrson
314ef3e72b [devel] Imported from libpng-1.5.4beta06.tar 2011-06-18 00:27:49 -05:00
Glenn Randers-Pehrson
86cf9b2e89 [devel] Bump version to libpng-1.5.4beta06 2011-06-17 21:13:51 -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
ab63dd0892 [devel] Renamed png_set_chop_16() to png_set_strip_16(). 2011-06-17 20:41:19 -05:00
Glenn Randers-Pehrson
3fb7c07ea5 [devel] Bump version to libpng-1.5.4beta05 2011-06-16 09:32:36 -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
5f0b9276ec [devel] Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again. 
If this is not enabled, png_set_strip_16() and png_do_scale_16_to_8()
aren't built.
 2011-06-16 09:05:40 -05:00
Glenn Randers-Pehrson
b0791f75ad [devel] Added PNG_TRANSFORM_CHOP_16 to the high-level read transforms. 2011-06-15 12:07:20 -05:00
Glenn Randers-Pehrson
903c64dce8 [devel] Added "#ifdef PNG_READ_BACKGROUND_SUPPORTED/#endif" in pngrtran.c 2011-06-15 11:50:23 -05:00
Glenn Randers-Pehrson
be720edba7 [devel] Correction to the expand_16 code; removed extra instance of 
png_set_scale_16_to_8 from pngpriv.h
 2011-06-15 08:20:37 -05:00
Glenn Randers-Pehrson
140504b11a [devel] Add synopsis for png_set_chop_16() to manual 
and fix some other small typos.
 2011-06-15 08:10:13 -05:00
John Bowler
cd3b0cc4d9 [devel] Fixed a problem in png_do_expand_palette() exposed by optimization in 
1.5.3beta06
  Also removed a spurious (totally unused and confusing) member from png_info.
  The palette expand optimization prevented expansion to an intermediate RGBA
    form if tRNS was present but alpha was marked to be stripped; this exposed
    a check for tRNS in png_do_expand_palette() which is inconsistent with the
    code elsewhere in libpng.
 2011-06-14 23:01:07 -05:00
Glenn Randers-Pehrson
06a9684cfa [devel] Bump version to libpng-1.5.4beta03 2011-06-14 11:06:42 -05:00
Glenn Randers-Pehrson
2232baa41b [devel] Made png_set_chop_16() API removeable 
by disabling PNG_CHOP_16_TO_8_SUPPORTED
 2011-06-14 06:59:46 -05:00
Glenn Randers-Pehrson
7dffa41643 [devel] Use the old scaling method for background if png_set_chop_16() was 
called.
 2011-06-14 06:30:12 -05:00
John Bowler
550bab03fb [devel] Removed the ACCURATE and LEGACY options (they are no longer useable) 
Fixed some compiliation problems with scaling options.
 2011-06-14 06:17:26 -05:00
Glenn Randers-Pehrson
413138a5ca [devel] Added png_set_chop_16() API. 2011-06-13 22:07:37 -05:00
Glenn Randers-Pehrson
97039baa88 [devel] Imported from libpng-1.5.4beta01.tar 2011-06-13 20:09:22 -05:00
Glenn Randers-Pehrson
fd73d04515 [devel] Moved definitions of PNG_HAVE_IHDR, PNG_AFTER_IDAT, and PNG_HAVE_PLTE 
outside of an unknown-chunk block in png.h because they are also
needed for other uses.
 2011-06-13 13:25:21 -05:00
Glenn Randers-Pehrson
141d9e3c20 [devel] Made it possible to undefine PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED 
to get the same (inaccurate) output as libpng-1.5.2 and earlier.
 2011-06-13 11:47:00 -05:00
Glenn Randers-Pehrson
0cb906d804 [devel] Imported from libpng-1.5.3beta11.tar 2011-06-11 14:23:33 -05:00
John Bowler
6f55ee2ec5 [devel] Added log option to pngvalid.c and attempted to improve gamma messages. 2011-06-11 07:28:06 -05:00
John Bowler
6a1dc2329a [devel] Removed string/memory macros that are no longer used 
and are not necessarily fully supportable, particularly png_strncpy and
png_snprintf.
 2011-06-11 06:58:46 -05:00
John Bowler
59a6c379dd [devel] Revised pngvalid.c to test PNG_ALPHA_MODE_SUPPORTED correctly. 
This allows pngvalid to build when ALPHA_MODE is not supported, which is
required if it is to build on libpng 1.4.
 2011-06-11 06:51:06 -05:00
John Bowler
d2f0bc2d13 [devel] Improved gamma range checks and other things OpenWatcom warns about. 2011-06-11 06:42:06 -05:00
John Bowler
0eadc27cd6 [devel] Added projects/owatcom, an IDE project for OpenWatcom to replace 
scripts/makefile.watcom.  This project works with OpenWatcom 1.9. The
    IDE autogenerates appropriate makefiles (libpng.mk) for batch processing.
    The project is configurable, unlike the Visual Studio project, so long
    as the developer has an awk.
 2011-06-11 06:31:28 -05:00
Glenn Randers-Pehrson
700c55036c [devel] Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro. 2011-06-10 23:26:03 -05:00
John Bowler
b2bee3374c [devel] Make the 16-to-8 scaling accurate. Dividing by 256 with no rounding is 
wrong (high by one) 25% of the time. Dividing by 257 with rounding is
    wrong in 128 out of 65536 cases. Getting the right answer all the time
    without division is easy.
 2011-06-10 23:24:58 -05:00
Glenn Randers-Pehrson
cc2770850a [devel] Revised documentation about png_set_user_limits() to say that it can 
only be used to reduce the defined limit, and that it also affects
png writing.
 2011-06-10 21:17:34 -05:00
Glenn Randers-Pehrson
fb27873021 [devel] Bump version to libpng-1.5.3beta11 2011-06-10 20:46:53 -05:00
Glenn Randers-Pehrson
254a513fd1 [devel] Fixed png_handle_sCAL which is broken in 1.5 2011-06-10 17:45:48 -05:00
Glenn Randers-Pehrson
ab1a573768 [devel] Imported from libpng-1.5.3rc03.tar 2011-06-07 19:56:51 -05:00
Glenn Randers-Pehrson
07e1d34a84 [devel] Fixed 1-byte uninitialized memory reference in png_format_buffer() 
(Bug report by Frank Busse, related to CVE-2004-0421).
 2011-06-07 14:35:30 -05:00
Glenn Randers-Pehrson
36edbb5eee [devel] Imported from libpng-1.5.3rc01.tar 2011-06-03 07:18:14 -05:00
Glenn Randers-Pehrson
0640cc3d3a [devel] Bump to version libpng-1.5.3beta11 2011-05-20 09:31:08 -05:00
Glenn Randers-Pehrson
3f68453d4a [devel] Imported from libpng-1.5.3beta10.tar 2011-05-20 09:30:08 -05:00
Glenn Randers-Pehrson
0a048923ae [devel] Update CHANGES and ANNOUNCE 2011-05-18 21:44:37 -05:00
Glenn Randers-Pehrson
66e1b3abba [devel] Bump to version libpng-1.5.3beta10 2011-05-17 07:03:21 -05:00
Glenn Randers-Pehrson
c261077788 [devel] Consistently use "n-bit", not "n bit" in CHANGES and ANNOUNCE. 2011-05-17 06:52:54 -05:00
John Bowler
1921e6db90 [devel] Reversed earlier change of transformation order; move 
png_expand_16 back where it was before libpng-1.5.3beta07.
The change doesn't work because it requires 16 bit gamma tables when the code
only generates 8 bit ones.  This fails silently; the libpng code just doesn't
do any gamma correction.  Moving the tests back leaves the old, inaccurate, 8
bit gamma calculations, but these are clearly better than none!
 2011-05-16 20:57:54 -05:00
Glenn Randers-Pehrson
bb4f77cd95 [devel] Bump to version libpng-1.5.3beta09 2011-05-16 20:42:11 -05:00
Glenn Randers-Pehrson
5ca62c9f35 [devel] Bump to version libpng-1.5.3rc01 2011-05-16 09:14:42 -05:00
Glenn Randers-Pehrson
1591a4c9dc [devel] Imported from libpng-1.5.3beta08.tar 2011-05-16 09:10:37 -05:00
Glenn Randers-Pehrson
0e128dfa2f [devel] Update CHANGES and ANNOUNCE; fix some new typos in comments. 2011-05-15 19:09:24 -05:00
John Bowler
cb0b29631f [devel] Documented png_set_alpha_mode(), other changes in libpng.3 and 
libpng-manual.txt.
  The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative
    parameters are supplied by the caller), while in the absence of cHRM
    sRGB/Rec 709 values are still used.
  The bKGD chunk no longer overwrites the background value set by
    png_set_background(), allowing the latter to be used before the file
    header is read. It never performed any useful function to override
    the default anyway.

Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
(subscription required; visit
 2011-05-12 21:48:29 -05:00
John Bowler
ed4d32baa4 [devel] Improve "pngvalid --speed" to exclude more of pngvalid from the time. 2011-05-11 23:02:28 -05:00
Glenn Randers-Pehrson
d83530f45d [devel] Bump to version libpng-1.5.3beta08 2011-05-11 14:39:11 -05:00
Glenn Randers-Pehrson
36fa2a0abd [devel] Check for up->location !PNG_AFTER_IDAT when writing unknown chunks 
before IDAT.
 2011-05-11 06:52:37 -05:00
Glenn Randers-Pehrson
2d3fc1ca3b [devel] Moved macro definitions for PNG_HAVE_IHDR, PNG_HAVE_PLTE, and 
PNG_AFTER_IDAT from pngpriv.h to png.h because they must be visible to
applications that call png_set_unknown_chunks().
 2011-05-10 23:48:00 -05:00
John Bowler
f70c7d02e9 [devel] Added named value and 'flag' gamma support to png_set_gamma. Made a 
minor change from the previous (unreleased) ABI/API to hide the exact value
used for Macs - it's not a good idea to embed this in the ABI!
 2011-05-10 22:54:37 -05:00