From 759c90368697f29ecbec767758fbf742c85aef2f Mon Sep 17 00:00:00 2001 From: Glenn Randers-Pehrson Date: Sat, 1 Feb 2014 20:11:48 -0600 Subject: [PATCH] [libpng16] Update documentation about sCAL support. --- libpng-manual.txt | 20 +++++++++++++------- libpng.3 | 35 +++++++++++++++++++++-------------- 2 files changed, 34 insertions(+), 21 deletions(-) diff --git a/libpng-manual.txt b/libpng-manual.txt index f5795274f..5647aa8bb 100644 --- a/libpng-manual.txt +++ b/libpng-manual.txt @@ -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 - 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 diff --git a/libpng.3 b/libpng.3 index 891638984..fbda05ebb 100644 --- a/libpng.3 +++ b/libpng.3 @@ -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 \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 - 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