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[libpng16] Update documentation about sCAL support.

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Glenn Randers-Pehrson 2014-02-01 20:11:48 -06:00
parent 8c12078e95
commit 759c903686
2 changed files with 34 additions and 21 deletions
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20
libpng-manual.txt
View File

@ -1,9 +1,9 @@
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.9rc02 - January 30, 2014
libpng version 1.6.9rc03 - February 2, 2014
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2013 Glenn Randers-Pehrson
Copyright (c) 1998-2014 Glenn Randers-Pehrson
This document is released under the libpng license.
For conditions of distribution and use, see the disclaimer
@ -11,9 +11,9 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.6.9rc02 - January 30, 2014
libpng versions 0.97, January 1998, through 1.6.9rc03 - February 2, 2014
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2013 Glenn Randers-Pehrson
Copyright (c) 1998-2014 Glenn Randers-Pehrson
libpng 1.0 beta 6 version 0.96 May 28, 1997
Updated and distributed by Andreas Dilger
@ -4393,6 +4393,9 @@ png_set_error_fn(), which is essentially the same function, but with a new
name to force compilation errors with applications that try to use the old
method.
Support for the sCAL, iCCP, iTXt, and sPLT chunks was added at libpng-1.0.6;
however, iTXt support was not enabled by default.
Starting with version 1.0.7, you can find out which version of the library
you are using at run-time:
@ -4726,7 +4729,10 @@ and the accuracy of PNG fixed point values is insufficient for
representation of these values. Consequently a "string" API
(png_get_sCAL_s and png_set_sCAL_s) is the only reliable way of reading
arbitrary sCAL chunks in the absence of either the floating point API or
internal floating point calculations.
internal floating point calculations. Starting with libpng-1.5.0, both
of these functions are present when PNG_sCAL_SUPPORTED is defined. Prior
to libpng-1.5.0, their presence also depended upon PNG_FIXED_POINT_SUPPORTED
being defined and PNG_FLOATING_POINT_SUPPORTED not being defined.
Applications no longer need to include the optional distribution header
file pngusr.h or define the corresponding macros during application
@ -5232,13 +5238,13 @@ Other rules can be inferred by inspecting the libpng source.
XVI. Y2K Compliance in libpng
January 30, 2014
February 2, 2014
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
upward through 1.6.9rc02 are Y2K compliant. It is my belief that earlier
upward through 1.6.9rc03 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has two year fields. One is a 2-byte unsigned integer

35
libpng.3
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@ -1,6 +1,6 @@
.TH LIBPNG 3 "January 30, 2014"
.TH LIBPNG 3 "February 2, 2014"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.9rc02
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.9rc03
.SH SYNOPSIS
\fB
#include <png.h>\fP
@ -504,10 +504,10 @@ 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 1.6.9rc02 - January 30, 2014
libpng version 1.6.9rc03 - February 2, 2014
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2013 Glenn Randers-Pehrson
Copyright (c) 1998-2014 Glenn Randers-Pehrson
This document is released under the libpng license.
For conditions of distribution and use, see the disclaimer
@ -515,9 +515,9 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.6.9rc02 - January 30, 2014
libpng versions 0.97, January 1998, through 1.6.9rc03 - February 2, 2014
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2013 Glenn Randers-Pehrson
Copyright (c) 1998-2014 Glenn Randers-Pehrson
libpng 1.0 beta 6 version 0.96 May 28, 1997
Updated and distributed by Andreas Dilger
@ -4898,6 +4898,9 @@ png_set_error_fn(), which is essentially the same function, but with a new
name to force compilation errors with applications that try to use the old
method.
Support for the sCAL, iCCP, iTXt, and sPLT chunks was added at libpng-1.0.6;
however, iTXt support was not enabled by default.
Starting with version 1.0.7, you can find out which version of the library
you are using at run-time:
@ -5231,7 +5234,10 @@ and the accuracy of PNG fixed point values is insufficient for
representation of these values. Consequently a "string" API
(png_get_sCAL_s and png_set_sCAL_s) is the only reliable way of reading
arbitrary sCAL chunks in the absence of either the floating point API or
internal floating point calculations.
internal floating point calculations. Starting with libpng-1.5.0, both
of these functions are present when PNG_sCAL_SUPPORTED is defined. Prior
to libpng-1.5.0, their presence also depended upon PNG_FIXED_POINT_SUPPORTED
being defined and PNG_FLOATING_POINT_SUPPORTED not being defined.
Applications no longer need to include the optional distribution header
file pngusr.h or define the corresponding macros during application
@ -5737,13 +5743,13 @@ Other rules can be inferred by inspecting the libpng source.
.SH XVI. Y2K Compliance in libpng
January 30, 2014
February 2, 2014
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
upward through 1.6.9rc02 are Y2K compliant. It is my belief that earlier
upward through 1.6.9rc03 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has two year fields. One is a 2-byte unsigned integer
@ -5971,8 +5977,9 @@ the first widely used release:
1.6.8beta01-02 16 10608 16.so.16.8[.0]
1.6.8rc01-02 16 10608 16.so.16.8[.0]
1.6.8 16 10608 16.so.16.8[.0]
1.6.8beta01-04 16 10609 16.so.16.9[.0]
1.6.8rc01-02 16 10609 16.so.16.9[.0]
1.6.9beta01-04 16 10609 16.so.16.9[.0]
1.6.9rc01-02 16 10609 16.so.16.9[.0]
1.6.9 16 10609 16.so.16.9[.0]
Henceforth the source version will match the shared-library minor
and patch numbers; the shared-library major version number will be
@ -6029,7 +6036,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.6.9rc02 - January 30, 2014:
Libpng version 1.6.9rc03 - February 2, 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).
@ -6052,7 +6059,7 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.6.9rc02, January 30, 2014, are
libpng versions 1.2.6, August 15, 2004, through 1.6.9rc03, February 2, 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
@ -6151,7 +6158,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
January 30, 2014
February 2, 2014
.\" end of man page