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
733b131545
[devel] Added information about "chop_16" to the manual.
2011-06-15 13:21:01 -05:00
Glenn Randers-Pehrson
ef217b76a3
[devel] Updated comments that mention 1.5.3; changed them to 1.5.4.
2011-06-15 12:58:27 -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
039ad872fe
[devel] Bump version to libpng-1.5.4beta04
2011-06-15 11:51:55 -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
8f4edd07be
[devel] Imported from libpng-1.5.4beta03.tar
2011-06-15 08:21:56 -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
45599ad00f
[devel] Imported from libpng-1.5.4beta02.tar
2011-06-14 07:17:29 -05:00
Glenn Randers-Pehrson
677819fe66
[devel] Check for READ_CHOP_16_TO_8 support in pngvalid,
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not libpng version for presence of png_set_chop_16_to_8(), in pngvalid.c
2011-06-14 07:10:47 -05:00
Glenn Randers-Pehrson
2232baa41b
[devel] Made png_set_chop_16() API removeable
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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
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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
John Bowler
74945f2f04
[devel] Fix and clarify LEGACY 16-to-8 scaling.
2011-06-13 20:50:42 -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
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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
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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
Glenn Randers-Pehrson
b704036531
[devel] Allow png_set_user_limits() to increase limits as well as reduce them.
2011-06-11 14:20:22 -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
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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
b011fe1c12
[devel] Remove testing cruft from projects/owatcom.
2011-06-11 06:36:51 -05:00
John Bowler
0eadc27cd6
[devel] Added projects/owatcom, an IDE project for OpenWatcom to replace
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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
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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
590fb8c481
[devel] Removed #ifdef in png.c that caused sCAL handler to leak memory.
2011-06-10 20:25:49 -05:00
John Bowler
4e8d7ec5fc
[devel] Added sCAL chunk to pngtest.png
2011-06-10 17:47:09 -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
38a9d2763c
[devel] Imported from libpng-1.5.3rc02.tar
2011-06-07 14:36:45 -05:00
Glenn Randers-Pehrson
07e1d34a84
[devel] Fixed 1-byte uninitialized memory reference in png_format_buffer()
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(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
3fceee058f
[devel] Fix typo in pngwutil.c comment.
2011-05-23 06:31:33 -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
John Bowler
5441e18988
[devel] Add tests for expand16, more fixes for palette image tests
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Changes only pngvalid and test-pngvalid-full.sh - no libpng changes -
corrects the code for palette image tests, disables attempts to validate
palette colors.
2011-05-18 18:57:12 -05:00
John Bowler
db0ed3e62d
[devel] png_set_background+png_expand_16 did not interwork correctly.
...
This problem is present in 1.5.2; if png_set_background is called with
need_expand false and the matching 16 bit color libpng erroneously just treats
it as an 8-bit color because of where png_do_expand_16 is in the transform
list. This simple fix reduces the supplied colour to 8 bits, so it gets
smashed, but this is better than the current behavior.
2011-05-18 18:51:24 -05:00
Glenn Randers-Pehrson
8a7ec52c8b
[devel] Consistently use "n-bit", not "n bit" in png.c
2011-05-17 07:14:30 -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
cd116fa248
[devel] Fix spelling of "conversion" in manual.
2011-05-17 06:56:50 -05:00
