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[libpng16] Updated documentation about the simplified API.

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Glenn Randers-Pehrson
2012-02-04 10:31:38 -06:00
parent ce3c7330ba
commit 5578c3719e
6 changed files with 41 additions and 534 deletions
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2
ANNOUNCE
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@@ -174,10 +174,12 @@ Version 1.6.0beta10 [February 3, 2012]
Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests
Updated list of test images in CMakeLists.txt
Updated the prebuilt configure files to current condition.
Revised INSTALL information about autogen.sh; it works in tar distributions.
Version 1.6.0beta11 [February 4, 2012]
Fix character count in pngstest command in projects/owatcom/pngstest.tgt
Revised test-pngstest.sh to report PASS/FAIL for each image.
Updated documentation about the simplified API.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

1
CHANGES
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@@ -3930,6 +3930,7 @@ Version 1.6.0beta10 [February 3, 2012]
Version 1.6.0beta11 [February 4, 2012]
Fix character count in pngstest command in projects/owatcom/pngstest.tgt
Revised test-pngstest.sh to report PASS/FAIL for each image.
Updated documentation about the simplified API.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

4
libpng-manual.txt
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@@ -3758,6 +3758,10 @@ READ APIs
setting the pointer to NULL. May be called at any time
after the structure is initialized.
When the simplified API needs to convert between sRGB and linear colorspaces,
the actual sRGB transfer curve defined in the sRGB specification (see the
article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
approximation used elsewhere in libpng.
WRITE APIS

537
libpng.3
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File diff suppressed because it is too large Load Diff

12
png.c
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@@ -762,13 +762,13 @@ png_get_copyright(png_const_structrp png_ptr)
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
"libpng version 1.6.0beta11 - February 3, 2012" PNG_STRING_NEWLINE \
"libpng version 1.6.0beta11 - February 4, 2012" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2012 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE;
# else
return "libpng version 1.6.0beta11 - February 3, 2012\
return "libpng version 1.6.0beta11 - February 4, 2012\
Copyright (c) 1998-2012 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -2974,9 +2974,11 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\
defined PNG_SIMPLIFIED_WRITE_SUPPORTED
/* sRGB conversion tables; these are machine generated with the code in
* contrib/tools/makesRGB.c. The sRGB to linear table is exact (to the
* nearest 16 bit linear fraction). The inverse (linear to sRGB) table has
* accuracies as follows:
* contrib/tools/makesRGB.c. The actual sRGB transfer curve defined in the
* specification (see the article at http://en.wikipedia.org/wiki/SRGB)
* is used, not the gamma=1/2.2 approximation use elsewhere in libpng.
* The sRGB to linear table is exact (to the nearest 16 bit linear fraction).
* The inverse (linear to sRGB) table has accuracies as follows:
*
* For all possible (255*65535+1) input values:
*

15
png.h
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@@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.6.0beta11 - February 3, 2012
* libpng version 1.6.0beta11 - February 4, 2012
* Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -11,7 +11,7 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.6.0beta11 - February 3, 2012: Glenn
* libpng versions 0.97, January 1998, through 1.6.0beta11 - February 4, 2012: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@@ -198,7 +198,7 @@
*
* This code is released under the libpng license.
*
* libpng versions 1.2.6, August 15, 2004, through 1.6.0beta11, February 3, 2012, are
* libpng versions 1.2.6, August 15, 2004, through 1.6.0beta11, February 4, 2012, are
* Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.2.5
* with the following individual added to the list of Contributing Authors:
@@ -310,7 +310,7 @@
* Y2K compliance in libpng:
* =========================
*
* February 3, 2012
* February 4, 2012
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
@@ -376,7 +376,7 @@
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.6.0beta11"
#define PNG_HEADER_VERSION_STRING \
" libpng version 1.6.0beta11 - February 3, 2012\n"
" libpng version 1.6.0beta11 - February 4, 2012\n"
#define PNG_LIBPNG_VER_SONUM 16
#define PNG_LIBPNG_VER_DLLNUM 16
@@ -2743,6 +2743,11 @@ typedef struct
* the sRGB specification. This encoding is identified by the
* PNG_FORMAT_FLAG_LINEAR flag below.
*
* When the simplified API needs to convert between sRGB and linear colorspaces,
* the actual sRGB transfer curve defined in the sRGB specification (see the
* article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
* approximation used elsewhere in libpng.
*
* When an alpha channel is present it is expected to denote pixel coverage
* of the color or luminance channels and is returned as an associated alpha
* channel: the color/gray channels are scaled (pre-multiplied) by the alpha