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Imported from libpng-1.0.6.tar

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Glenn Randers-Pehrson
2000-03-21 05:13:06 -06:00
parent a77ef625a6
commit 520a764cd7
74 changed files with 2298 additions and 1436 deletions
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png.h
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@@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.0.5s - February 18, 2000
* libpng version 1.0.6 - March 21, 2000
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@@ -9,19 +9,150 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.89c, May 1996: Guy Schalnat
* libpng versions 0.90, December 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.0.5s - February 18, 2000: Glenn
* libpng versions 0.97, January 1998, through 1.0.6 - March 21, 2000: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
*
* Due to various miscommunications, unforeseen code incompatibilities
* and occasional factors outside the authors' control, version numbering
* on the library has not always been consistent and straightforward.
* The following table summarizes matters since version 0.89c, which was
* the first widely used release:
*
* source png.h png.h shared-lib
* version string int version
* ------- ------ ----- ----------
* 0.89c ("1.0 beta 3") 0.89 89 1.0.89
* 0.90 ("1.0 beta 4") 0.90 90 0.90 [should have been 2.0.90]
* 0.95 ("1.0 beta 5") 0.95 95 0.95 [should have been 2.0.95]
* 0.96 ("1.0 beta 6") 0.96 96 0.96 [should have been 2.0.96]
* 0.97b ("1.00.97 beta 7") 1.00.97 97 1.0.1 [should have been 2.0.97]
* 0.97c 0.97 97 2.0.97
* 0.98 0.98 98 2.0.98
* 0.99 0.99 98 2.0.99
* 0.99a-m 0.99 99 2.0.99
* 1.00 1.00 100 2.1.0 [100 should be 10000]
* 1.0.0 1.0.0 100 2.1.0 [100 should be 10000]
* 1.0.1 1.0.1 10001 2.1.0
* 1.0.1a-e 1.0.1a-e 10002 2.1.0.1a-e
* 1.0.2 1.0.2 10002 2.1.0.2
* 1.0.2a-b 1.0.2a-b 10003 2.1.0.2a-b
* 1.0.3 1.0.3 10003 2.1.0.3
* 1.0.3a-d 1.0.3a-d 10004 2.1.0.3a-d
* 1.0.4 1.0.4 10004 2.1.0.4
* 1.0.4a-f 1.0.4a-f 10005 2.1.0.4a-f
* 1.0.5 1.0.5 10005 2.1.0.5
* 1.0.5a-d 1.0.5a-d 10006 2.1.0.5a-d
* 1.0.5e-r 1.0.5e-r 10100 2.1.0.5e-r (not compatible)
* 1.0.5s-v 1.0.5s-v 10006 2.1.0.5s-w (compatible)
* 1.0.6 1.0.6 10006 2.1.0.6
* 1.3.0 1.3.0 10300 3.1.3.0
*
* Henceforth the source version will match the shared-library minor
* and patch numbers; the shared-library major version number will be
* used for changes in backward compatibility, as it is intended. The
* PNG_PNGLIB_VER macro, which is not used within libpng but is available
* for applications, is an unsigned integer of the form xyyzz corresponding
* to the source version x.y.z (leading zeros in y and z). Internal
* png-group beta versions (x.y.z[a-z]) will be given the next higher
* number.
*
* See libpng.txt or libpng.3 for more information. The PNG specification
* is available as RFC 2083 <ftp://ftp.uu.net/graphics/png/documents/>
* and as a W3C Recommendation <http://www.w3.org/TR/REC.png.html>
*/
/*
* COPYRIGHT NOTICE:
*
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* (libpng versions 0.5, May 1995, through 0.89c, May 1996)
* Copyright (c) 1996, 1997 Andreas Dilger
* (libpng versions 0.90, December 1996, through 0.96, May 1997)
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
* (libpng versions 0.97, January 1998, through 1.0.6, March 21, 2000)
*
* For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals:
*
* John Bowler
* Kevin Bracey
* Sam Bushell
* Andreas Dilger
* Magnus Holmgren
* Tom Lane
* Dave Martindale
* Glenn Randers-Pehrson
* Eric S. Raymond
* Greg Roelofs
* Guy Eric Schalnat
* Paul Schmidt
* Tom Tanner
* Willem van Schaik
* Tim Wegner
*
* The PNG Reference Library is supplied "AS IS". The Contributing Authors
* and Group 42, Inc. disclaim all warranties, expressed or implied,
* including, without limitation, the warranties of merchantability and of
* fitness for any purpose. The Contributing Authors and Group 42, Inc.
* assume no liability for direct, indirect, incidental, special, exemplary,
* or consequential damages, which may result from the use of the PNG
* Reference Library, even if advised of the possibility of such damage.
*
* Permission is hereby granted to use, copy, modify, and distribute this
* source code, or portions hereof, for any purpose, without fee, subject
* to the following restrictions:
*
* 1. The origin of this source code must not be misrepresented.
*
* 2. Altered versions must be plainly marked as such and must not
* be misrepresented as being the original source.
*
* 3. This Copyright notice may not be removed or altered from any
* source or altered source distribution.
*
* The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to
* supporting the PNG file format in commercial products. If you use this
* source code in a product, acknowledgment is not required but would be
* appreciated.
*/
/*
* A "png_get_copyright" function is available, for convenient use in "about"
* boxes and the like:
*
* printf("%s",png_get_copyright(NULL));
*
* Also, the PNG logo (in PNG format, of course) is supplied in the
* file "pngnow.png".
*/
/*
* Libpng is OSI Certified Open Source Software. OSI Certified is a
* certification mark of the Open Source Initiative.
*/
/*
* The contributing authors would like to thank all those who helped
* with testing, bug fixes, and patience. This wouldn't have been
* possible without all of you.
*
* Thanks to Frank J. T. Wojcik for helping with the documentation.
*/
/*
* Y2K compliance in libpng:
* =========================
*
* February 18, 2000
* March 21, 2000
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
* upward through 1.0.5s are Y2K compliant. It is my belief that earlier
* upward through 1.0.6 are Y2K compliant. It is my belief that earlier
* versions were also Y2K compliant.
*
* Libpng only has three year fields. One is a 2-byte unsigned integer
@@ -65,137 +196,6 @@
* Glenn Randers-Pehrson
* libpng maintainer
* PNG Development Group
*
* Note about libpng version numbers:
*
* Due to various miscommunications, unforeseen code incompatibilities
* and occasional factors outside the authors' control, version numbering
* on the library has not always been consistent and straightforward.
* The following table summarizes matters since version 0.89c, which was
* the first widely used release:
*
* source png.h png.h shared-lib
* version string int version
* ------- ------ ----- ----------
* 0.89c ("1.0 beta 3") 0.89 89 1.0.89
* 0.90 ("1.0 beta 4") 0.90 90 0.90 [should have been 2.0.90]
* 0.95 ("1.0 beta 5") 0.95 95 0.95 [should have been 2.0.95]
* 0.96 ("1.0 beta 6") 0.96 96 0.96 [should have been 2.0.96]
* 0.97b ("1.00.97 beta 7") 1.00.97 97 1.0.1 [should have been 2.0.97]
* 0.97c 0.97 97 2.0.97
* 0.98 0.98 98 2.0.98
* 0.99 0.99 98 2.0.99
* 0.99a-m 0.99 99 2.0.99
* 1.00 1.00 100 2.1.0 [100 should be 10000]
* 1.0.0 1.0.0 100 2.1.0 [100 should be 10000]
* 1.0.1 1.0.1 10001 2.1.0
* 1.0.1a-e 1.0.1a-e 10002 2.1.0.1a-e
* 1.0.2 1.0.2 10002 2.1.0.2
* 1.0.2a-b 1.0.2a-b 10003 2.1.0.2a-b
* 1.0.3 1.0.3 10003 2.1.0.3
* 1.0.3a-d 1.0.3a-d 10004 2.1.0.3a-d
* 1.0.4 1.0.4 10004 2.1.0.4
* 1.0.4a-f 1.0.4a-f 10005 2.1.0.4a-f
* 1.0.5 1.0.5 10005 2.1.0.5
* 1.0.5a-d 1.0.5a-d 10006 2.1.0.5a-d
* 1.0.5e-r 1.0.5e-r 10100 2.1.0.5e-r (not compatible)
* 1.0.5s 1.0.5s 10006 2.1.0.5s (compatible)
* 1.3.0 1.3.0 10300 3.1.3.0
*
* Henceforth the source version will match the shared-library minor
* and patch numbers; the shared-library major version number will be
* used for changes in backward compatibility, as it is intended. The
* PNG_PNGLIB_VER macro, which is not used within libpng but is available
* for applications, is an unsigned integer of the form xyyzz corresponding
* to the source version x.y.z (leading zeros in y and z). Internal
* png-group beta versions (x.y.z[a-z]) will be given the next higher
* number.
*
* See libpng.txt or libpng.3 for more information. The PNG specification
* is available as RFC 2083 <ftp://ftp.uu.net/graphics/png/documents/>
* and as a W3C Recommendation <http://www.w3.org/TR/REC.png.html>
*/
/*
* COPYRIGHT NOTICE:
*
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* (libpng versions 0.5, May 1995, through 0.89c, May 1996)
* Copyright (c) 1996, 1997 Andreas Dilger
* (libpng versions 0.90, December 1996, through 0.96, May 1997)
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
* (libpng versions 0.97, January 1998, through 1.0.5s, February 18, 2000)
*
* For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals:
*
* John Bowler
* Kevin Bracey
* Sam Bushell
* Andreas Dilger
* Magnus Holmgren
* Tom Lane
* Dave Martindale
* Glenn Randers-Pehrson
* Eric S. Raymond
* Greg Roelofs
* Guy Eric Schalnat
* Paul Schmidt
* Tom Tanner
* Willem van Schaik
* Tim Wegner
*
* The PNG Reference Library is supplied "AS IS". The Contributing Authors
* and Group 42, Inc. disclaim all warranties, expressed or implied,
* including, without limitation, the warranties of merchantability and of
* fitness for any purpose. The Contributing Authors and Group 42, Inc.
* assume no liability for direct, indirect, incidental, special, exemplary,
* or consequential damages, which may result from the use of the PNG
* Reference Library, even if advised of the possibility of such damage.
*
* Permission is hereby granted to use, copy, modify, and distribute this
* source code, or portions hereof, for any purpose, without fee, subject
* to the following restrictions:
*
* 1. The origin of this source code must not be
* misrepresented.
*
* 2. Altered versions must be plainly marked as such
* and must not be misrepresented as being the
* original source.
*
* 3. This Copyright notice may not be removed or
* altered from any source or altered source
* distribution.
*
* The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to
* supporting the PNG file format in commercial products. If you use this
* source code in a product, acknowledgment is not required but would be
* appreciated.
*/
/*
* A "png_get_copyright" function is available, for convenient use in "about"
* boxes and the like:
*
* printf("%s",png_get_copyright(NULL));
*
* Also, the PNG logo (in PNG format, of course) is supplied in the
* file "pngnow.png".
*/
/*
* Libpng is OSI Certified Open Source Software. OSI Certified is a
* certification mark of the Open Source Initiative.
*/
/*
* The contributing authors would like to thank all those who helped
* with testing, bug fixes, and patience. This wouldn't have been
* possible without all of you.
*
* Thanks to Frank J. T. Wojcik for helping with the documentation.
*/
#ifndef _PNG_H
@@ -230,7 +230,7 @@ extern "C" {
*/
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.0.5s"
#define PNG_LIBPNG_VER_STRING "1.0.6"
/* Careful here. At one time, Guy wanted to use 082, but that would be octal.
* We must not include leading zeros.
@@ -310,26 +310,26 @@ typedef png_color_8 FAR * FAR * png_color_8pp;
* The following two structures are used for the in-core representation
* of sPLT chunks.
*/
typedef struct png_spalette_entry_struct
typedef struct png_sPLT_entry_struct
{
png_uint_16 red;
png_uint_16 green;
png_uint_16 blue;
png_uint_16 alpha;
png_uint_16 frequency;
} png_spalette_entry;
typedef png_spalette_entry FAR * png_spalette_entryp;
typedef png_spalette_entry FAR * FAR * png_spalette_entrypp;
} png_sPLT_entry;
typedef png_sPLT_entry FAR * png_sPLT_entryp;
typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp;
typedef struct png_spalette_struct
typedef struct png_sPLT_struct
{
png_charp name; /* palette name */
png_byte depth; /* depth of palette samples */
png_spalette_entryp entries; /* palette entries */
png_sPLT_entryp entries; /* palette entries */
png_int_32 nentries; /* number of palette entries */
} png_spalette;
typedef png_spalette FAR * png_spalette_p;
typedef png_spalette FAR * FAR * png_spalette_pp;
} png_sPLT_t;
typedef png_sPLT_t FAR * png_sPLT_tp;
typedef png_sPLT_t FAR * FAR * png_sPLT_tpp;
#ifdef PNG_TEXT_SUPPORTED
/* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file,
@@ -635,7 +635,7 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
#if defined(PNG_sPLT_SUPPORTED)
/* data on sPLT chunks (there may be more than one). */
png_spalette_p splt_palettes;
png_sPLT_tp splt_palettes;
png_uint_32 splt_palettes_num;
#endif
@@ -1039,9 +1039,9 @@ struct png_struct_def
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
png_byte rgb_to_gray_status;
png_byte rgb_to_gray_red_coeff;
png_byte rgb_to_gray_green_coeff;
png_byte rgb_to_gray_blue_coeff;
png_uint_16 rgb_to_gray_red_coeff;
png_uint_16 rgb_to_gray_green_coeff;
png_uint_16 rgb_to_gray_blue_coeff;
#endif
#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
@@ -1056,9 +1056,9 @@ struct png_struct_def
};
/* This prevents a compiler error in png_get_copyright() in png.c if png.c
and png.h are both at * version 1.0.5s
and png.h are both at * version 1.0.6
*/
typedef png_structp version_1_0_5s;
typedef png_structp version_1_0_6;
typedef png_struct FAR * FAR * png_structpp;
@@ -1179,6 +1179,8 @@ extern PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr));
extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr,
int error_action, double red, double green ));
#endif
extern PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr,
int error_action, png_fixed_point red, png_fixed_point green ));
extern PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp
png_ptr));
#endif
@@ -1887,12 +1889,12 @@ extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr,
#if defined(PNG_READ_sPLT_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_spalette_pp entries));
png_infop info_ptr, png_sPLT_tpp entries));
#endif
#if defined(PNG_sPLT_SUPPORTED)
extern PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_spalette_p entries, int nentries));
png_infop info_ptr, png_sPLT_tp entries, int nentries));
#endif
#if defined(PNG_TEXT_SUPPORTED)
@@ -2029,7 +2031,7 @@ extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr)
extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr));
#define PNG_HEADER_VERSION_STRING \
" libpng version 1.0.5s - February 18, 2000 (header)\n"
" libpng version 1.0.6 - March 21, 2000 (header)\n"
#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
/* With these routines we avoid an integer divide, which will be slower on
@@ -2083,7 +2085,6 @@ extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr));
/* Various modes of operation. Note that after an init, mode is set to
* zero automatically when the structure is created.
*/
#define PNG_BEFORE_IHDR 0x00
#define PNG_HAVE_IHDR 0x01
#define PNG_HAVE_PLTE 0x02
#define PNG_HAVE_IDAT 0x04
@@ -2404,7 +2405,7 @@ PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr,
#if defined(PNG_WRITE_sPLT_SUPPORTED)
PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr,
png_spalette_p palette));
png_sPLT_tp palette));
#endif
#if defined(PNG_WRITE_tRNS_SUPPORTED)