[libpng16] Updated documentation about the simplified API.
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Glenn Randers-Pehrson
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ce3c7330ba
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5578c3719e
2
ANNOUNCE
2
ANNOUNCE
@ -174,10 +174,12 @@ Version 1.6.0beta10 [February 3, 2012]
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Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests
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Updated list of test images in CMakeLists.txt
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Updated the prebuilt configure files to current condition.
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Revised INSTALL information about autogen.sh; it works in tar distributions.
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Version 1.6.0beta11 [February 4, 2012]
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Fix character count in pngstest command in projects/owatcom/pngstest.tgt
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Revised test-pngstest.sh to report PASS/FAIL for each image.
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Updated documentation about the simplified API.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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1
CHANGES
1
CHANGES
@ -3930,6 +3930,7 @@ Version 1.6.0beta10 [February 3, 2012]
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Version 1.6.0beta11 [February 4, 2012]
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Fix character count in pngstest command in projects/owatcom/pngstest.tgt
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Revised test-pngstest.sh to report PASS/FAIL for each image.
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Updated documentation about the simplified API.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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@ -3758,6 +3758,10 @@ READ APIs
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setting the pointer to NULL. May be called at any time
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after the structure is initialized.
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When the simplified API needs to convert between sRGB and linear colorspaces,
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the actual sRGB transfer curve defined in the sRGB specification (see the
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article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
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approximation used elsewhere in libpng.
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WRITE APIS
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12
png.c
12
png.c
@ -762,13 +762,13 @@ png_get_copyright(png_const_structrp png_ptr)
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#else
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# ifdef __STDC__
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return PNG_STRING_NEWLINE \
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"libpng version 1.6.0beta11 - February 3, 2012" PNG_STRING_NEWLINE \
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"libpng version 1.6.0beta11 - February 4, 2012" PNG_STRING_NEWLINE \
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"Copyright (c) 1998-2012 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
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"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
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"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
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PNG_STRING_NEWLINE;
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# else
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return "libpng version 1.6.0beta11 - February 3, 2012\
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return "libpng version 1.6.0beta11 - February 4, 2012\
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Copyright (c) 1998-2012 Glenn Randers-Pehrson\
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Copyright (c) 1996-1997 Andreas Dilger\
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Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
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@ -2974,9 +2974,11 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
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#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\
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defined PNG_SIMPLIFIED_WRITE_SUPPORTED
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/* sRGB conversion tables; these are machine generated with the code in
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* contrib/tools/makesRGB.c. The sRGB to linear table is exact (to the
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* nearest 16 bit linear fraction). The inverse (linear to sRGB) table has
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* accuracies as follows:
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* contrib/tools/makesRGB.c. The actual sRGB transfer curve defined in the
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* specification (see the article at http://en.wikipedia.org/wiki/SRGB)
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* is used, not the gamma=1/2.2 approximation use elsewhere in libpng.
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* The sRGB to linear table is exact (to the nearest 16 bit linear fraction).
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* The inverse (linear to sRGB) table has accuracies as follows:
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*
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* For all possible (255*65535+1) input values:
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*
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19
png.h
19
png.h
@ -1,7 +1,7 @@
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/* png.h - header file for PNG reference library
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*
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* libpng version 1.6.0beta11 - February 3, 2012
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* libpng version 1.6.0beta11 - February 4, 2012
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* Copyright (c) 1998-2012 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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@ -11,7 +11,7 @@
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* Authors and maintainers:
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* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
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* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
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* libpng versions 0.97, January 1998, through 1.6.0beta11 - February 3, 2012: Glenn
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* libpng versions 0.97, January 1998, through 1.6.0beta11 - February 4, 2012: Glenn
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* See also "Contributing Authors", below.
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*
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* Note about libpng version numbers:
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@ -198,7 +198,7 @@
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*
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* This code is released under the libpng license.
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*
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* libpng versions 1.2.6, August 15, 2004, through 1.6.0beta11, February 3, 2012, are
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* libpng versions 1.2.6, August 15, 2004, through 1.6.0beta11, February 4, 2012, are
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* Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are
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* distributed according to the same disclaimer and license as libpng-1.2.5
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* with the following individual added to the list of Contributing Authors:
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@ -310,7 +310,7 @@
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* Y2K compliance in libpng:
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* =========================
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*
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* February 3, 2012
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* February 4, 2012
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*
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* Since the PNG Development group is an ad-hoc body, we can't make
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* an official declaration.
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@ -376,7 +376,7 @@
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/* Version information for png.h - this should match the version in png.c */
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#define PNG_LIBPNG_VER_STRING "1.6.0beta11"
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#define PNG_HEADER_VERSION_STRING \
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" libpng version 1.6.0beta11 - February 3, 2012\n"
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" libpng version 1.6.0beta11 - February 4, 2012\n"
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#define PNG_LIBPNG_VER_SONUM 16
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#define PNG_LIBPNG_VER_DLLNUM 16
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@ -2734,7 +2734,7 @@ typedef struct
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* luminance channels the value is encoded according to the sRGB specification
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* and matches the 8-bit format expected by typical display devices.
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*
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* The color/gray channels are not scaled (pre-multiplied) by the alpha
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* The color/gray channels are not scaled (pre-multiplied) by the alpha
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* channel and are suitable for passing to color management software.
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*
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* b) As a value in the range 0..65535, contained in a 2-byte integer. All
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@ -2743,7 +2743,12 @@ typedef struct
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* the sRGB specification. This encoding is identified by the
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* PNG_FORMAT_FLAG_LINEAR flag below.
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*
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* When an alpha channel is present it is expected to denote pixel coverage
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* When the simplified API needs to convert between sRGB and linear colorspaces,
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* the actual sRGB transfer curve defined in the sRGB specification (see the
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* article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
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* approximation used elsewhere in libpng.
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*
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* When an alpha channel is present it is expected to denote pixel coverage
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* of the color or luminance channels and is returned as an associated alpha
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* channel: the color/gray channels are scaled (pre-multiplied) by the alpha
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* value.
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