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[libpng16] Added note about png_get_rowbytes() being affected by transforms

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Glenn Randers-Pehrson
2017-07-03 11:11:44 -05:00
parent 89b8c133e7
commit b5c16f8bfc
2 changed files with 18 additions and 8 deletions
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9
libpng-manual.txt
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@@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.31beta01 - June 28, 2017 libpng version 1.6.31beta01 - July 3, 2017
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) 1998-2017 Glenn Randers-Pehrson Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.6.31beta01 - June 28, 2017 libpng versions 0.97, January 1998, through 1.6.31beta01 - July 3, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2017 Glenn Randers-Pehrson Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -1330,6 +1330,11 @@ in until png_read_end() has read the chunk data following the image.
rowbytes = png_get_rowbytes(png_ptr, info_ptr); rowbytes = png_get_rowbytes(png_ptr, info_ptr);
rowbytes - number of bytes needed to hold a row rowbytes - number of bytes needed to hold a row
This value, the bit_depth, color_type,
and the number of channels can change
if you use transforms such as
png_set_expand(). See
png_read_update_info(), below.
signature = png_get_signature(png_ptr, info_ptr); signature = png_get_signature(png_ptr, info_ptr);

17
libpng.3
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@@ -1,4 +1,4 @@
.TH LIBPNG 3 "June 28, 2017" .TH LIBPNG 3 "July 3, 2017"
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.31beta01 libpng \- Portable Network Graphics (PNG) Reference Library 1.6.31beta01
.SH SYNOPSIS .SH SYNOPSIS
@@ -510,7 +510,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
.SH LIBPNG.TXT .SH LIBPNG.TXT
libpng-manual.txt - A description on how to use and modify libpng libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.31beta01 - June 28, 2017 libpng version 1.6.31beta01 - July 3, 2017
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) 1998-2017 Glenn Randers-Pehrson Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -521,7 +521,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.6.31beta01 - June 28, 2017 libpng versions 0.97, January 1998, through 1.6.31beta01 - July 3, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2017 Glenn Randers-Pehrson Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -1840,6 +1840,11 @@ in until png_read_end() has read the chunk data following the image.
rowbytes = png_get_rowbytes(png_ptr, info_ptr); rowbytes = png_get_rowbytes(png_ptr, info_ptr);
rowbytes - number of bytes needed to hold a row rowbytes - number of bytes needed to hold a row
This value, the bit_depth, color_type,
and the number of channels can change
if you use transforms such as
png_set_expand(). See
png_read_update_info(), below.
signature = png_get_signature(png_ptr, info_ptr); signature = png_get_signature(png_ptr, info_ptr);
@@ -6051,7 +6056,7 @@ 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 1.6.31beta01 - June 28, 2017: Libpng version 1.6.31beta01 - July 3, 2017:
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).
@@ -6076,7 +6081,7 @@ this sentence.
This code is released under the libpng license. This code is released under the libpng license.
libpng versions 1.0.7, July 1, 2000 through 1.6.31beta01, June 28, 2017 are libpng versions 1.0.7, July 1, 2000 through 1.6.31beta01, July 3, 2017 are
Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
derived from libpng-1.0.6, and are distributed according to the same derived from libpng-1.0.6, and are distributed according to the same
disclaimer and license as libpng-1.0.6 with the following individuals disclaimer and license as libpng-1.0.6 with the following individuals
@@ -6204,7 +6209,7 @@ files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
Glenn Randers-Pehrson Glenn Randers-Pehrson
glennrp at users.sourceforge.net glennrp at users.sourceforge.net
June 28, 2017 July 3, 2017
.\" end of man page .\" end of man page