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[devel] Mentioned in the documentation that applications must #include "zlib.h"

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if they need access to anything in zlib.h, and that a number of
macros such as png_memset() are no longer accessible by applications.
This commit is contained in:
Glenn Randers-Pehrson 2011-01-15 19:25:34 -06:00
parent 366eb49f99
commit 00879b155a
4 changed files with 49 additions and 13 deletions
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7
ANNOUNCE
View File

@ -1,5 +1,5 @@
Libpng 1.5.1beta04 - January 15, 2011
Libpng 1.5.1beta04 - January 16, 2011
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
@ -42,8 +42,11 @@ Version 1.5.1beta02 [January 14, 2011]
Version 1.5.1beta03 [January 14, 2011]
Fixed typecasting of some png_debug() statements (Cosmin)
Version 1.5.1beta04 [January 15, 2011]
Version 1.5.1beta04 [January 16, 2011]
Updated documentation of png_set|get_tRNS() (Thomas Klausner).
Mentioned in the documentation that applications must #include "zlib.h"
if they need access to anything in zlib.h, and that a number of
macros such as png_memset() are no longer accessible by applications.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
(subscription required; visit

5
CHANGES
View File

@ -3158,8 +3158,11 @@ Version 1.5.1beta02 [January 14, 2011]
Version 1.5.1beta03 [January 14, 2011]
Fixed typecasting of some png_debug() statements (Cosmin)
Version 1.5.1beta04 [January 15, 2011]
Version 1.5.1beta04 [January 16, 2011]
Updated documentation of png_set|get_tRNS() (Thomas Klausner).
Mentioned in the documentation that applications must #include "zlib.h"
if they need access to anything in zlib.h, and that a number of
macros such as png_memset() are no longer accessible by applications.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

21
libpng-manual.txt
View File

@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.5.1beta04 - January 15, 2011
libpng version 1.5.1beta04 - January 16, 2011
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2010 Glenn Randers-Pehrson
@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.5.1beta04 - January 15, 2011
libpng versions 0.97, January 1998, through 1.5.1beta04 - January 16, 2011
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2010 Glenn Randers-Pehrson
@ -3460,6 +3460,15 @@ the main libpng control structures, png_struct and png_info, deprecated
in earlier versions of libpng, has been completely removed from
libpng 1.5.
We no longer include zlib.h in png.h. Applications that need access
to information in zlib.h will need to add the '#include "zlib.h"'
directive. It does not matter whether it is placed prior to or after
the '"#include png.h"' directive.
We moved the png_strcpy(), png_strncpy(), png_strlen(), png_memcpy(),
png_memcmp(), png_sprintf, and png_memcpy() macros into a private
header file (pngpriv.h) that is not accessible to applications.
In png_get_iCCP, the type of "profile" was changed from png_charpp
to png_bytepp, and in png_set_iCCP, from png_charp to png_const_bytepp.
@ -3498,6 +3507,12 @@ even if the library uses floating point in internal calculations. A new
macro, PNG_FLOATING_ARITHMETIC_SUPPORTED, reveals whether the library
uses floating point arithmetic (the default) or fixed point arithmetic
internally for performance critical calculations such as gamma correction.
In some cases, the gamma calculations may produce slightly different
results. This has changed the results in png_rgb_to_gray and in alpha
composition (png_set_background for example). This applies even if the
original image was already linear (gamma == 1.0) and, therefore, it is
not necessary to linearize the image. This is because libpng has *not*
been changed to optimize that case correctly, yet.
Fixed point support for the sCAL chunk comes with an important caveat;
the sCAL specification uses a decimal encoding of floating point values
@ -3838,7 +3853,7 @@ Other rules can be inferred by inspecting the libpng source.
XIV. Y2K Compliance in libpng
January 15, 2011
January 16, 2011
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.

29
libpng.3
View File

@ -1,4 +1,4 @@
.TH LIBPNG 3 "January 15, 2011"
.TH LIBPNG 3 "January 16, 2011"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.5.1beta04
.SH SYNOPSIS
@ -851,7 +851,7 @@ 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 1.5.1beta04 - January 15, 2011
libpng version 1.5.1beta04 - January 16, 2011
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2010 Glenn Randers-Pehrson
@ -862,7 +862,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.5.1beta04 - January 15, 2011
libpng versions 0.97, January 1998, through 1.5.1beta04 - January 16, 2011
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2010 Glenn Randers-Pehrson
@ -4311,6 +4311,15 @@ the main libpng control structures, png_struct and png_info, deprecated
in earlier versions of libpng, has been completely removed from
libpng 1.5.
We no longer include zlib.h in png.h. Applications that need access
to information in zlib.h will need to add the '#include "zlib.h"'
directive. It does not matter whether it is placed prior to or after
the '"#include png.h"' directive.
We moved the png_strcpy(), png_strncpy(), png_strlen(), png_memcpy(),
png_memcmp(), png_sprintf, and png_memcpy() macros into a private
header file (pngpriv.h) that is not accessible to applications.
In png_get_iCCP, the type of "profile" was changed from png_charpp
to png_bytepp, and in png_set_iCCP, from png_charp to png_const_bytepp.
@ -4349,6 +4358,12 @@ even if the library uses floating point in internal calculations. A new
macro, PNG_FLOATING_ARITHMETIC_SUPPORTED, reveals whether the library
uses floating point arithmetic (the default) or fixed point arithmetic
internally for performance critical calculations such as gamma correction.
In some cases, the gamma calculations may produce slightly different
results. This has changed the results in png_rgb_to_gray and in alpha
composition (png_set_background for example). This applies even if the
original image was already linear (gamma == 1.0) and, therefore, it is
not necessary to linearize the image. This is because libpng has *not*
been changed to optimize that case correctly, yet.
Fixed point support for the sCAL chunk comes with an important caveat;
the sCAL specification uses a decimal encoding of floating point values
@ -4689,7 +4704,7 @@ Other rules can be inferred by inspecting the libpng source.
.SH XIV. Y2K Compliance in libpng
January 15, 2011
January 16, 2011
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
@ -4936,7 +4951,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.5.1beta04 - January 15, 2011:
Libpng version 1.5.1beta04 - January 16, 2011:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@ -4959,7 +4974,7 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.5.1beta04, January 15, 2011, are
libpng versions 1.2.6, August 15, 2004, through 1.5.1beta04, January 16, 2011, 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
@ -5058,7 +5073,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
January 15, 2011
January 16, 2011
.\" end of man page