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[libpng15] Update documentation of user limits

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Glenn Randers-Pehrson
2017-05-22 10:21:11 -05:00
parent 11ece2b403
commit dc2b679f13
2 changed files with 30 additions and 28 deletions
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25
libpng-manual.txt
View File

@@ -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 1.5.29beta02 - April 1, 2017 libpng version 1.5.29beta02 - May 22, 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) 1998-2014 Glenn Randers-Pehrson Copyright (c) 1998-2014 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 1.5.29beta02 - April 1, 2017 libpng versions 0.97, January 1998, through 1.5.29beta02 - May 22, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2014 Glenn Randers-Pehrson Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -4245,14 +4245,15 @@ PNG_USER_WIDTH_MAX and PNG_USER_HEIGHT_MAX, although this document said
that it could be used to override them. Now this function will reduce or that it could be used to override them. Now this function will reduce or
increase the limits. increase the limits.
Starting in libpng-1.5.10, the user limits can be set en masse with the From libpng-1.5.10 through libpng-1.5.21, the user limits could be set
configuration option PNG_SAFE_LIMITS_SUPPORTED. If this option is enabled, en masse with the configuration option PNG_SAFE_LIMITS_SUPPORTED. If this
a set of "safe" limits is applied in pngpriv.h. These can be overridden by option was enabled, a set of "safe" limits was applied in pngpriv.h. Beginning
application calls to png_set_user_limits(), png_set_user_chunk_cache_max(), with libpng-1.5.22, the "safe" limits were applied by default. These can be
and/or png_set_user_malloc_max() that increase or decrease the limits. Also, overridden by application calls to png_set_user_limits(),
in libpng-1.5.10 the default width and height limits were increased png_set_user_chunk_cache_max(), and/or png_set_user_malloc_max() that increase
from 1,000,000 to 0x7fffffff (i.e., made unlimited). Therefore, the or decrease the limits. Also, in libpng-1.5.10 the default width and height
limits are now limits were increased from 1,000,000 to 0x7fffffff (i.e., made unlimited).
Therefore, the limits are now
default safe default safe
png_user_width_max 0x7fffffff 1,000,000 png_user_width_max 0x7fffffff 1,000,000
png_user_height_max 0x7fffffff 1,000,000 png_user_height_max 0x7fffffff 1,000,000
@@ -4369,11 +4370,11 @@ control. The git repository was built from old libpng-x.y.z.tar.gz files
going back to version 0.70. You can access the git repository (read only) going back to version 0.70. You can access the git repository (read only)
at at
https://git.code.sf.net/p/libpng/code.git git://git.code.sf.net/p/libpng/code.git
or you can browse it with a web browser by selecting the "code" button at or you can browse it with a web browser by selecting the "code" button at
https://sourceforge.net/projects/libpng/ https://sourceforge.net/projects/libpng
Patches can be sent to glennrp at users.sourceforge.net or to Patches can be sent to glennrp at users.sourceforge.net or to
png-mng-implement at lists.sourceforge.net or you can upload them to png-mng-implement at lists.sourceforge.net or you can upload them to

33
libpng.3
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@@ -1,4 +1,4 @@
.TH LIBPNG 3 "April 3, 2017" .TH LIBPNG 3 "May 22, 2017"
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.5.29beta02 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.29beta02
.SH SYNOPSIS .SH SYNOPSIS
@@ -496,7 +496,7 @@ 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 1.5.29beta02 - April 3, 2017 libpng version 1.5.29beta02 - May 22, 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) 1998-2014 Glenn Randers-Pehrson Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -507,7 +507,7 @@ Libpng-manual.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.5.29beta02 - April 3, 2017 libpng versions 0.97, January 1998, through 1.5.29beta02 - May 22, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2014 Glenn Randers-Pehrson Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -4741,14 +4741,15 @@ PNG_USER_WIDTH_MAX and PNG_USER_HEIGHT_MAX, although this document said
that it could be used to override them. Now this function will reduce or that it could be used to override them. Now this function will reduce or
increase the limits. increase the limits.
Starting in libpng-1.5.10, the user limits can be set en masse with the From libpng-1.5.10 through libpng-1.5.21, the user limits could be set
configuration option PNG_SAFE_LIMITS_SUPPORTED. If this option is enabled, en masse with the configuration option PNG_SAFE_LIMITS_SUPPORTED. If this
a set of "safe" limits is applied in pngpriv.h. These can be overridden by option was enabled, a set of "safe" limits was applied in pngpriv.h. Beginning
application calls to png_set_user_limits(), png_set_user_chunk_cache_max(), with libpng-1.5.22, the "safe" limits were applied by default. These can be
and/or png_set_user_malloc_max() that increase or decrease the limits. Also, overridden by application calls to png_set_user_limits(),
in libpng-1.5.10 the default width and height limits were increased png_set_user_chunk_cache_max(), and/or png_set_user_malloc_max() that increase
from 1,000,000 to 0x7fffffff (i.e., made unlimited). Therefore, the or decrease the limits. Also, in libpng-1.5.10 the default width and height
limits are now limits were increased from 1,000,000 to 0x7fffffff (i.e., made unlimited).
Therefore, the limits are now
default safe default safe
png_user_width_max 0x7fffffff 1,000,000 png_user_width_max 0x7fffffff 1,000,000
png_user_height_max 0x7fffffff 1,000,000 png_user_height_max 0x7fffffff 1,000,000
@@ -4865,11 +4866,11 @@ control. The git repository was built from old libpng-x.y.z.tar.gz files
going back to version 0.70. You can access the git repository (read only) going back to version 0.70. You can access the git repository (read only)
at at
https://git.code.sf.net/p/libpng/code.git git://git.code.sf.net/p/libpng/code.git
or you can browse it with a web browser by selecting the "code" button at or you can browse it with a web browser by selecting the "code" button at
https://sourceforge.net/projects/libpng/ https://sourceforge.net/projects/libpng
Patches can be sent to glennrp at users.sourceforge.net or to Patches can be sent to glennrp at users.sourceforge.net or to
png-mng-implement at lists.sourceforge.net or you can upload them to png-mng-implement at lists.sourceforge.net or you can upload them to
@@ -5167,7 +5168,7 @@ 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 1.5.29beta02 - April 3, 2017: Libpng version 1.5.29beta02 - May 22, 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).
@@ -5192,7 +5193,7 @@ 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 1.5.29beta02, April 3, 2017, are libpng versions 1.0.7, July 1, 2000 through 1.5.29beta02, May 22, 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
@@ -5316,7 +5317,7 @@ 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
April 3, 2017 May 22, 2017
.\" end of man page .\" end of man page