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[libpng16] Added PNG_SKIP_sRGB_CHECK_PROFILE choice for png_set_option().

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Glenn Randers-Pehrson
2014-05-07 12:07:12 -05:00
parent 0d5ac5d809
commit e95ce2c517
6 changed files with 57 additions and 31 deletions
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32
libpng.3
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@@ -1,4 +1,4 @@
.TH LIBPNG 3 "April 26, 2014"
.TH LIBPNG 3 "May 7, 2014"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.11beta06
.SH SYNOPSIS
@@ -504,7 +504,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
.SH LIBPNG.TXT
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.11beta06 - April 26, 2014
libpng version 1.6.11beta06 - May 7, 2014
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -515,7 +515,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.6.11beta06 - April 26, 2014
libpng versions 0.97, January 1998, through 1.6.11beta06 - May 7, 2014
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -5542,11 +5542,19 @@ Error detection in some chunks has improved; in particular the iCCP chunk
reader now does pretty complete validation of the basic format. Some bad
profiles that were previously accepted are now accepted with a warning or
rejected, depending upon the png_set_benign_errors() setting, in particular the
very old broken Microsoft/HP 3144-byte sRGB profile. The PNG spec requirement
that only grayscale profiles may appear in images with color type 0 or 4 and
that even if the image only contains gray pixels, only RGB profiles may appear
in images with color type 2, 3, or 6, is now enforced. The sRGB chunk
is allowed to appear in images with any color type.
very old broken Microsoft/HP 3144-byte sRGB profile. Starting with
libpng-1.6.11, recognizing and checking sRGB profiles can be avoided by
means of
png_set_option(ping, PNG_SKIP_sRGB_CHECK_PROFILE,
PNG_OPTION_ON);
The PNG spec requirement that only grayscale profiles may appear in images
with color type 0 or 4 and that even if the image only contains gray pixels,
only RGB profiles may appear in images with color type 2, 3, or 6, is now
enforced. The sRGB chunk is allowed to appear in images with any color type
and is interpreted by libpng to convey a one-tracer-curve profile or a
three-tracer-curve profile as appropriate.
Prior to libpng-1.6.0 a warning would be issued if the iTXt chunk contained
an empty language field or an empty translated keyword. Both of these
@@ -5765,7 +5773,7 @@ Other rules can be inferred by inspecting the libpng source.
.SH XVI. Y2K Compliance in libpng
April 26, 2014
May 7, 2014
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
@@ -6062,7 +6070,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.6.11beta06 - April 26, 2014:
Libpng version 1.6.11beta06 - May 7, 2014:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@@ -6085,7 +6093,7 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.6.11beta06, April 26, 2014, are
libpng versions 1.2.6, August 15, 2004, through 1.6.11beta06, May 7, 2014, are
Copyright (c) 2004,2006-2007 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
@@ -6184,7 +6192,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
April 26, 2014
May 7, 2014
.\" end of man page