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[master] Imported from libpng-1.2.41beta09.tar

This commit is contained in:
Glenn Randers-Pehrson 2009-10-31 21:28:36 -05:00
parent 5d67107c79
commit a68974409c
20 changed files with 93 additions and 33 deletions
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2
INSTALL
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@ -1,5 +1,5 @@
Installing libpng version 1.2.41beta09 - October 30, 2009
Installing libpng version 1.2.41beta09 - November 1, 2009
On Unix/Linux and similar systems, you can simply type

4
LICENSE
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@ -10,7 +10,7 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.2.41beta09, October 30, 2009, are
libpng versions 1.2.6, August 15, 2004, through 1.2.41beta09, November 1, 2009, are
Copyright (c) 2004, 2006-2009 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
@ -108,4 +108,4 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
October 30, 2009
November 1, 2009

2
README
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@ -1,4 +1,4 @@
README for libpng version 1.2.41beta09 - October 30, 2009 (shared library 12.0)
README for libpng version 1.2.41beta09 - November 1, 2009 (shared library 12.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.

2
Y2KINFO
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@ -1,7 +1,7 @@
Y2K compliance in libpng:
=========================
October 30, 2009
November 1, 2009
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.

2
libpng-1.2.41beta09.txt
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@ -421,7 +421,7 @@ where 0x7fffffffL means unlimited. You can retrieve this limit with
chunk_cache_max = png_get_chunk_cache_max(png_ptr);
This limit also applies to the number of buffers that can be allocated
by png_decompress_chunk().
by png_decompress_chunk() while decompressing iTXt, zTXt, and iCCP chunks.
The high-level read interface

74
libpng.3
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@ -1,4 +1,4 @@
.TH LIBPNG 3 "October 30, 2009"
.TH LIBPNG 3 "November 1, 2009"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.2.41beta09
.SH SYNOPSIS
@ -821,7 +821,7 @@ Following is a copy of the libpng.txt file that accompanies libpng.
.SH LIBPNG.TXT
libpng.txt - A description on how to use and modify libpng
libpng version 1.2.41beta09 - October 30, 2009
libpng version 1.2.41beta09 - November 1, 2009
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2009 Glenn Randers-Pehrson
@ -832,7 +832,7 @@ libpng.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.2.41beta09 - October 30, 2009
libpng versions 0.97, January 1998, through 1.2.41beta09 - November 1, 2009
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2009 Glenn Randers-Pehrson
@ -1231,6 +1231,19 @@ If you need to retrieve the limits that are being applied, use
width_max = png_get_user_width_max(png_ptr);
height_max = png_get_user_height_max(png_ptr);
The PNG specification sets no limit on the number of ancillary chunks
allowed in a PNG datastream. You can impose a limit on the total number
of sPLT, tEXt, iTXt, zTXt, and unknown chunks that will be stored, with
png_set_chunk_cache_max(png_ptr, user_chunk_cache_max);
where 0x7fffffffL means unlimited. You can retrieve this limit with
chunk_cache_max = png_get_chunk_cache_max(png_ptr);
This limit also applies to the number of buffers that can be allocated
by png_decompress_chunk() while decompressing iTXt, zTXt, and iCCP chunks.
.SS The high-level read interface
At this point there are two ways to proceed; through the high-level
@ -1258,6 +1271,8 @@ you want to do are limited to the following set:
PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity
to transparency
PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples
PNG_TRANSFORM_GRAY_TO_RGB Expand grayscale samples
to RGB (or GA to RGBA)
(This excludes setting a background color, doing gamma transformation,
dithering, and setting filler.) If this is the case, simply do this:
@ -1501,6 +1516,10 @@ into the info_ptr is returned for any complex types.
string for unknown).
text_ptr[i].lang_key - keyword in UTF-8
(empty string for unknown).
Note that the itxt_length, lang, and lang_key
members of the text_ptr structure only exist
when the library is built with iTXt chunk support.
num_text - number of comments (same as
num_comments; you can put NULL here
to avoid the duplication)
@ -1680,6 +1699,43 @@ things.
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.
As of libpng version 1.2.41beta09, not all possible expansions are supported.
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
the tRNS chunk is present, A means an alpha channel is present, and O
means tRNS or alpha is present but all pixels in the image are opaque.
FROM 01 31 0 0T 0O 2 2T 2O 3 3T 3O 4A 4O 6A 6O
TO
01 -
31 -
0 1 -
0T -
0O -
2 GX -
2T -
2O -
3 1 -
3T -
3O -
4A T -
4O -
6A GX TX TX -
6O GX TX -
Within the matrix,
"-" means the transformation is not supported.
"X" means the transformation is obtained by png_set_expand().
"1" means the transformation is obtained by
png_set_expand_gray_1_2_4_to_8
"G" means the transformation is obtained by
png_set_gray_to_rgb().
"P" means the transformation is obtained by
png_set_expand_palette_to_rgb().
"T" means the transformation is obtained by
png_set_tRNS_to_alpha().
PNG can have files with 16 bits per channel. If you only can handle
8 bits per channel, this will strip the pixels down to 8 bit.
@ -2737,6 +2793,10 @@ width, height, bit_depth, and color_type must be the same in each call.
empty for unknown).
text_ptr[i].translated_keyword - keyword in UTF-8 (NULL
or empty for unknown).
Note that the itxt_length, lang, and lang_key
members of the text_ptr structure only exist
when the library is built with iTXt chunk support.
num_text - number of comments
png_set_sPLT(png_ptr, info_ptr, &palette_ptr,
@ -3967,7 +4027,7 @@ source.
.SH XIII. Y2K Compliance in libpng
October 30, 2009
November 1, 2009
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
@ -4313,7 +4373,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.2.41beta09 - October 30, 2009:
Libpng version 1.2.41beta09 - November 1, 2009:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@ -4336,7 +4396,7 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.2.41beta09, October 30, 2009, are
libpng versions 1.2.6, August 15, 2004, through 1.2.41beta09, November 1, 2009, are
Copyright (c) 2004,2006-2008 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
@ -4435,7 +4495,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
October 30, 2009
November 1, 2009
.\" end of man page

2
libpngpf.3
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@ -1,4 +1,4 @@
.TH LIBPNGPF 3 "October 30, 2009"
.TH LIBPNGPF 3 "November 1, 2009"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.2.41beta09
(private functions)

2
png.5
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@ -1,4 +1,4 @@
.TH PNG 5 "October 30, 2009"
.TH PNG 5 "November 1, 2009"
.SH NAME
png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION

6
png.c
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@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -722,13 +722,13 @@ png_get_copyright(png_structp png_ptr)
#else
#ifdef __STDC__
return ((png_charp) PNG_STRING_NEWLINE \
"libpng version x 1.2.41beta09 - October 30, 2009" PNG_STRING_NEWLINE \
"libpng version x 1.2.41beta09 - November 1, 2009" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2009 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE);
#else
return ((png_charp) "libpng version 1.2.41beta09 - October 30, 2009\
return ((png_charp) "libpng version 1.2.41beta09 - November 1, 2009\
Copyright (c) 1998-2009 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");

10
png.h
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@ -1,6 +1,6 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.2.41beta09 - October 30, 2009
* libpng version 1.2.41beta09 - November 1, 2009
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -10,7 +10,7 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.2.41beta09 - October 30, 2009: Glenn
* libpng versions 0.97, January 1998, through 1.2.41beta09 - November 1, 2009: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@ -277,7 +277,7 @@
*
* This code is released under the libpng license.
*
* libpng versions 1.2.6, August 15, 2004, through 1.2.41beta09, October 30, 2009, are
* libpng versions 1.2.6, August 15, 2004, through 1.2.41beta09, November 1, 2009, are
* Copyright (c) 2004, 2006-2009 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:
@ -389,7 +389,7 @@
* Y2K compliance in libpng:
* =========================
*
* October 30, 2009
* November 1, 2009
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
@ -453,7 +453,7 @@
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.2.41beta09"
#define PNG_HEADER_VERSION_STRING \
" libpng version 1.2.41beta09 - October 30, 2009\n"
" libpng version 1.2.41beta09 - November 1, 2009\n"
#define PNG_LIBPNG_VER_SONUM 0
#define PNG_LIBPNG_VER_DLLNUM 13

2
pngerror.c
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@ -1,7 +1,7 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngget.c
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@ -1,7 +1,7 @@
/* pngget.c - retrieval of values from info struct
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngrio.c
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@ -1,7 +1,7 @@
/* pngrio.c - functions for data input
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngrtran.c
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@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngtest.c
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@ -1,7 +1,7 @@
/* pngtest.c - a simple test program to test libpng
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngtrans.c
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@ -1,7 +1,7 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngwio.c
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@ -1,7 +1,7 @@
/* pngwio.c - functions for data output
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngwrite.c
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@ -1,7 +1,7 @@
/* pngwrite.c - general routines to write a PNG file
*
* Last changed in libpng 1.2.41 [October 31, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngwtran.c
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@ -1,7 +1,7 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

2
pngwutil.c
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@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
* Last changed in libpng 1.2.41 [October 30, 2009]
* Last changed in libpng 1.2.41 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)