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[devel] Fixed a typo in the manual about dithering

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Glenn Randers-Pehrson 2011-04-03 11:34:40 -05:00
parent 11130874d4
commit 3926448598
2 changed files with 19 additions and 17 deletions
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13
libpng-1.4.6rc01.txt
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@ -1,6 +1,6 @@
libpng.txt - A description on how to use and modify libpng libpng.txt - A description on how to use and modify libpng
libpng version 1.4.6rc01 - March 31, 2011 libpng version 1.4.6rc02 - April 3, 2011
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net> <glennrp at users.sourceforge.net>
Copyright (c) 1998-2010 Glenn Randers-Pehrson Copyright (c) 1998-2010 Glenn Randers-Pehrson
@ -11,7 +11,7 @@ libpng.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.4.6rc01 - March 31, 2011 libpng versions 0.97, January 1998, through 1.4.6rc02 - April 3, 2011
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2010 Glenn Randers-Pehrson Copyright (c) 1998-2010 Glenn Randers-Pehrson
@ -905,7 +905,7 @@ things.
As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
added. It expands the sample depth without changing tRNS to alpha. added. It expands the sample depth without changing tRNS to alpha.
As of libpng version 1.4.6rc01, not all possible expansions are supported. As of libpng version 1.4.6rc02, not all possible expansions are supported.
In the following table, the 01 means grayscale with depth<8, 31 means In the following table, the 01 means grayscale with depth<8, 31 means
indexed with depth<8, other numerals represent the color type, "T" means indexed with depth<8, other numerals represent the color type, "T" means
@ -3157,7 +3157,8 @@ The png_zalloc() function no longer zeroes out the memory that it
allocates. allocates.
Support for dithering was disabled by default in libpng-1.4.0, because Support for dithering was disabled by default in libpng-1.4.0, because
been well tested and doesn't actually "dither". The code was not it has not been well tested and doesn't actually "dither".
The code was not
removed, however, and could be enabled by building libpng with removed, however, and could be enabled by building libpng with
PNG_READ_DITHER_SUPPORTED defined. In libpng-1.4.2, this support PNG_READ_DITHER_SUPPORTED defined. In libpng-1.4.2, this support
was reenabled, but the function was renamed png_set_quantize() to was reenabled, but the function was renamed png_set_quantize() to
@ -3306,13 +3307,13 @@ Other rules can be inferred by inspecting the libpng source.
XIII. Y2K Compliance in libpng XIII. Y2K Compliance in libpng
March 31, 2011 April 3, 2011
Since the PNG Development group is an ad-hoc body, we can't make Since the PNG Development group is an ad-hoc body, we can't make
an official declaration. an official declaration.
This is your unofficial assurance that libpng from version 0.71 and This is your unofficial assurance that libpng from version 0.71 and
upward through 1.4.6rc01 are Y2K compliant. It is my belief that earlier upward through 1.4.6rc02 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant. versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that Libpng only has three year fields. One is a 2-byte unsigned integer that

23
libpng.3
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@ -1,6 +1,6 @@
.TH LIBPNG 3 "March 31, 2011" .TH LIBPNG 3 "April 3, 2011"
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.4.6rc01 libpng \- Portable Network Graphics (PNG) Reference Library 1.4.6rc02
.SH SYNOPSIS .SH SYNOPSIS
\fI\fB \fI\fB
@ -895,7 +895,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
.SH LIBPNG.TXT .SH LIBPNG.TXT
libpng.txt - A description on how to use and modify libpng libpng.txt - A description on how to use and modify libpng
libpng version 1.4.6rc01 - March 31, 2011 libpng version 1.4.6rc02 - April 3, 2011
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net> <glennrp at users.sourceforge.net>
Copyright (c) 1998-2010 Glenn Randers-Pehrson Copyright (c) 1998-2010 Glenn Randers-Pehrson
@ -906,7 +906,7 @@ libpng.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.4.6rc01 - March 31, 2011 libpng versions 0.97, January 1998, through 1.4.6rc02 - April 3, 2011
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2010 Glenn Randers-Pehrson Copyright (c) 1998-2010 Glenn Randers-Pehrson
@ -1800,7 +1800,7 @@ things.
As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
added. It expands the sample depth without changing tRNS to alpha. added. It expands the sample depth without changing tRNS to alpha.
As of libpng version 1.4.6rc01, not all possible expansions are supported. As of libpng version 1.4.6rc02, not all possible expansions are supported.
In the following table, the 01 means grayscale with depth<8, 31 means In the following table, the 01 means grayscale with depth<8, 31 means
indexed with depth<8, other numerals represent the color type, "T" means indexed with depth<8, other numerals represent the color type, "T" means
@ -4052,7 +4052,8 @@ The png_zalloc() function no longer zeroes out the memory that it
allocates. allocates.
Support for dithering was disabled by default in libpng-1.4.0, because Support for dithering was disabled by default in libpng-1.4.0, because
been well tested and doesn't actually "dither". The code was not it has not been well tested and doesn't actually "dither".
The code was not
removed, however, and could be enabled by building libpng with removed, however, and could be enabled by building libpng with
PNG_READ_DITHER_SUPPORTED defined. In libpng-1.4.2, this support PNG_READ_DITHER_SUPPORTED defined. In libpng-1.4.2, this support
was reenabled, but the function was renamed png_set_quantize() to was reenabled, but the function was renamed png_set_quantize() to
@ -4201,13 +4202,13 @@ Other rules can be inferred by inspecting the libpng source.
.SH XIII. Y2K Compliance in libpng .SH XIII. Y2K Compliance in libpng
March 31, 2011 April 3, 2011
Since the PNG Development group is an ad-hoc body, we can't make Since the PNG Development group is an ad-hoc body, we can't make
an official declaration. an official declaration.
This is your unofficial assurance that libpng from version 0.71 and This is your unofficial assurance that libpng from version 0.71 and
upward through 1.4.6rc01 are Y2K compliant. It is my belief that earlier upward through 1.4.6rc02 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant. versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that Libpng only has three year fields. One is a 2-byte unsigned integer that
@ -4456,7 +4457,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation. Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.4.6rc01 - March 31, 2011: Libpng version 1.4.6rc02 - April 3, 2011:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc. Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net). Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@ -4479,7 +4480,7 @@ this sentence.
This code is released under the libpng license. This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.4.6rc01, March 31, 2011, are libpng versions 1.2.6, August 15, 2004, through 1.4.6rc02, April 3, 2011, are
Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5 distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors with the following individual added to the list of Contributing Authors
@ -4578,7 +4579,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson Glenn Randers-Pehrson
glennrp at users.sourceforge.net glennrp at users.sourceforge.net
March 31, 2011 April 3, 2011
.\" end of man page .\" end of man page