/* png.h - header file for PNG reference library

 *

 * libpng version 1.2.32 - September 18, 2008

 * Copyright (c) 1998-2008 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.)

 *

 * 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 1.2.32 - September 18, 2008: 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      (from here on, the   100  2.1.0 [100 should be 10000]

 *    1.0.1       png.h string is   10001  2.1.0

 *    1.0.1a-e    identical to the  10002  from here on, the shared library

 *    1.0.2       source version)   10002  is 2.V where V is the source code

 *    1.0.2a-b                      10003  version, except as noted.

 *    1.0.3                         10003

 *    1.0.3a-d                      10004

 *    1.0.4                         10004

 *    1.0.4a-f                      10005

 *    1.0.5 (+ 2 patches)           10005

 *    1.0.5a-d                      10006

 *    1.0.5e-r                      10100 (not source compatible)

 *    1.0.5s-v                      10006 (not binary compatible)

 *    1.0.6 (+ 3 patches)           10006 (still binary incompatible)

 *    1.0.6d-f                      10007 (still binary incompatible)

 *    1.0.6g                        10007

 *    1.0.6h                        10007  10.6h (testing xy.z so-numbering)

 *    1.0.6i                        10007  10.6i

 *    1.0.6j                        10007  2.1.0.6j (incompatible with 1.0.0)

 *    1.0.7beta11-14        DLLNUM  10007  2.1.0.7beta11-14 (binary compatible)

 *    1.0.7beta15-18           1    10007  2.1.0.7beta15-18 (binary compatible)

 *    1.0.7rc1-2               1    10007  2.1.0.7rc1-2 (binary compatible)

 *    1.0.7                    1    10007  (still compatible)

 *    1.0.8beta1-4             1    10008  2.1.0.8beta1-4

 *    1.0.8rc1                 1    10008  2.1.0.8rc1

 *    1.0.8                    1    10008  2.1.0.8

 *    1.0.9beta1-6             1    10009  2.1.0.9beta1-6

 *    1.0.9rc1                 1    10009  2.1.0.9rc1

 *    1.0.9beta7-10            1    10009  2.1.0.9beta7-10

 *    1.0.9rc2                 1    10009  2.1.0.9rc2

 *    1.0.9                    1    10009  2.1.0.9

 *    1.0.10beta1              1    10010  2.1.0.10beta1

 *    1.0.10rc1                1    10010  2.1.0.10rc1

 *    1.0.10                   1    10010  2.1.0.10

 *    1.0.11beta1-3            1    10011  2.1.0.11beta1-3

 *    1.0.11rc1                1    10011  2.1.0.11rc1

 *    1.0.11                   1    10011  2.1.0.11

 *    1.0.12beta1-2            2    10012  2.1.0.12beta1-2

 *    1.0.12rc1                2    10012  2.1.0.12rc1

 *    1.0.12                   2    10012  2.1.0.12

 *    1.1.0a-f                 -    10100  2.1.1.0a-f (branch abandoned)

 *    1.2.0beta1-2             2    10200  2.1.2.0beta1-2

 *    1.2.0beta3-5             3    10200  3.1.2.0beta3-5

 *    1.2.0rc1                 3    10200  3.1.2.0rc1

 *    1.2.0                    3    10200  3.1.2.0

 *    1.2.1beta1-4             3    10201  3.1.2.1beta1-4

 *    1.2.1rc1-2               3    10201  3.1.2.1rc1-2

 *    1.2.1                    3    10201  3.1.2.1

 *    1.2.2beta1-6            12    10202  12.so.0.1.2.2beta1-6

 *    1.0.13beta1             10    10013  10.so.0.1.0.13beta1

 *    1.0.13rc1               10    10013  10.so.0.1.0.13rc1

 *    1.2.2rc1                12    10202  12.so.0.1.2.2rc1

 *    1.0.13                  10    10013  10.so.0.1.0.13

 *    1.2.2                   12    10202  12.so.0.1.2.2

 *    1.2.3rc1-6              12    10203  12.so.0.1.2.3rc1-6

 *    1.2.3                   12    10203  12.so.0.1.2.3

 *    1.2.4beta1-3            13    10204  12.so.0.1.2.4beta1-3

 *    1.0.14rc1               13    10014  10.so.0.1.0.14rc1

 *    1.2.4rc1                13    10204  12.so.0.1.2.4rc1

 *    1.0.14                  10    10014  10.so.0.1.0.14

 *    1.2.4                   13    10204  12.so.0.1.2.4

 *    1.2.5beta1-2            13    10205  12.so.0.1.2.5beta1-2

 *    1.0.15rc1-3             10    10015  10.so.0.1.0.15rc1-3

 *    1.2.5rc1-3              13    10205  12.so.0.1.2.5rc1-3

 *    1.0.15                  10    10015  10.so.0.1.0.15

 *    1.2.5                   13    10205  12.so.0.1.2.5

 *    1.2.6beta1-4            13    10206  12.so.0.1.2.6beta1-4

 *    1.0.16                  10    10016  10.so.0.1.0.16

 *    1.2.6                   13    10206  12.so.0.1.2.6

 *    1.2.7beta1-2            13    10207  12.so.0.1.2.7beta1-2

 *    1.0.17rc1               10    10017  10.so.0.1.0.17rc1

 *    1.2.7rc1                13    10207  12.so.0.1.2.7rc1

 *    1.0.17                  10    10017  10.so.0.1.0.17

 *    1.2.7                   13    10207  12.so.0.1.2.7

 *    1.2.8beta1-5            13    10208  12.so.0.1.2.8beta1-5

 *    1.0.18rc1-5             10    10018  10.so.0.1.0.18rc1-5

 *    1.2.8rc1-5              13    10208  12.so.0.1.2.8rc1-5

 *    1.0.18                  10    10018  10.so.0.1.0.18

 *    1.2.8                   13    10208  12.so.0.1.2.8

 *    1.2.9beta1-3            13    10209  12.so.0.1.2.9beta1-3

 *    1.2.9beta4-11           13    10209  12.so.0.9[.0]

 *    1.2.9rc1                13    10209  12.so.0.9[.0]

 *    1.2.9                   13    10209  12.so.0.9[.0]

 *    1.2.10beta1-8           13    10210  12.so.0.10[.0]

 *    1.2.10rc1-3             13    10210  12.so.0.10[.0]

 *    1.2.10                  13    10210  12.so.0.10[.0]

 *    1.2.11beta1-4           13    10211  12.so.0.11[.0]

 *    1.0.19rc1-5             10    10019  10.so.0.19[.0]

 *    1.2.11rc1-5             13    10211  12.so.0.11[.0]

 *    1.0.19                  10    10019  10.so.0.19[.0]

 *    1.2.11                  13    10211  12.so.0.11[.0]

 *    1.0.20                  10    10020  10.so.0.20[.0]

 *    1.2.12                  13    10212  12.so.0.12[.0]

 *    1.2.13beta1             13    10213  12.so.0.13[.0]

 *    1.0.21                  10    10021  10.so.0.21[.0]

 *    1.2.13                  13    10213  12.so.0.13[.0]

 *    1.2.14beta1-2           13    10214  12.so.0.14[.0]

 *    1.0.22rc1               10    10022  10.so.0.22[.0]

 *    1.2.14rc1               13    10214  12.so.0.14[.0]

 *    1.0.22                  10    10022  10.so.0.22[.0]

 *    1.2.14                  13    10214  12.so.0.14[.0]

 *    1.2.15beta1-6           13    10215  12.so.0.15[.0]

 *    1.0.23rc1-5             10    10023  10.so.0.23[.0]

 *    1.2.15rc1-5             13    10215  12.so.0.15[.0]

 *    1.0.23                  10    10023  10.so.0.23[.0]

 *    1.2.15                  13    10215  12.so.0.15[.0]

 *    1.2.16beta1-2           13    10216  12.so.0.16[.0]

 *    1.2.16rc1               13    10216  12.so.0.16[.0]

 *    1.0.24                  10    10024  10.so.0.24[.0]

 *    1.2.16                  13    10216  12.so.0.16[.0]

 *    1.2.17beta1-2           13    10217  12.so.0.17[.0]

 *    1.0.25rc1               10    10025  10.so.0.25[.0]

 *    1.2.17rc1-3             13    10217  12.so.0.17[.0]

 *    1.0.25                  10    10025  10.so.0.25[.0]

 *    1.2.17                  13    10217  12.so.0.17[.0]

 *    1.0.26                  10    10026  10.so.0.26[.0]

 *    1.2.18                  13    10218  12.so.0.18[.0]

 *    1.2.19beta1-31          13    10219  12.so.0.19[.0]

 *    1.0.27rc1-6             10    10027  10.so.0.27[.0]

 *    1.2.19rc1-6             13    10219  12.so.0.19[.0]

 *    1.0.27                  10    10027  10.so.0.27[.0]

 *    1.2.19                  13    10219  12.so.0.19[.0]

 *    1.2.20beta01-04         13    10220  12.so.0.20[.0]

 *    1.0.28rc1-6             10    10028  10.so.0.28[.0]

 *    1.2.20rc1-6             13    10220  12.so.0.20[.0]

 *    1.0.28                  10    10028  10.so.0.28[.0]

 *    1.2.20                  13    10220  12.so.0.20[.0]

 *    1.2.21beta1-2           13    10221  12.so.0.21[.0]

 *    1.2.21rc1-3             13    10221  12.so.0.21[.0]

 *    1.0.29                  10    10029  10.so.0.29[.0]

 *    1.2.21                  13    10221  12.so.0.21[.0]

 *    1.2.22beta1-4           13    10222  12.so.0.22[.0]

 *    1.0.30rc1               10    10030  10.so.0.30[.0]

 *    1.2.22rc1               13    10222  12.so.0.22[.0]

 *    1.0.30                  10    10030  10.so.0.30[.0]

 *    1.2.22                  13    10222  12.so.0.22[.0]

 *    1.2.23beta01-05         13    10223  12.so.0.23[.0]

 *    1.2.23rc01              13    10223  12.so.0.23[.0]

 *    1.2.23                  13    10223  12.so.0.23[.0]

 *    1.2.24beta01-02         13    10224  12.so.0.24[.0]

 *    1.2.24rc01              13    10224  12.so.0.24[.0]

 *    1.2.24                  13    10224  12.so.0.24[.0]

 *    1.2.25beta01-06         13    10225  12.so.0.25[.0]

 *    1.2.25rc01-02           13    10225  12.so.0.25[.0]

 *    1.0.31                  10    10031  10.so.0.31[.0]

 *    1.2.25                  13    10225  12.so.0.25[.0]

 *    1.2.26beta01-06         13    10226  12.so.0.26[.0]

 *    1.2.26rc01              13    10226  12.so.0.26[.0]

 *    1.2.26                  13    10226  12.so.0.26[.0]

 *    1.0.32                  10    10032  10.so.0.32[.0]

 *    1.2.27beta01-06         13    10227  12.so.0.27[.0]

 *    1.2.27rc01              13    10227  12.so.0.27[.0]

 *    1.0.33                  10    10033  10.so.0.33[.0]

 *    1.2.27                  13    10227  12.so.0.27[.0]

 *    1.0.34                  10    10034  10.so.0.34[.0]

 *    1.2.28                  13    10228  12.so.0.28[.0]

 *    1.2.29beta01-03         13    10229  12.so.0.29[.0]

 *    1.2.29rc01              13    10229  12.so.0.29[.0]

 *    1.0.35                  10    10035  10.so.0.35[.0]

 *    1.2.29                  13    10229  12.so.0.29[.0]

 *    1.0.37                  10    10037  10.so.0.37[.0]

 *    1.2.30beta01-04         13    10230  12.so.0.30[.0]

 *    1.0.38rc01-08           10    10038  10.so.0.38[.0]

 *    1.2.30rc01-08           13    10230  12.so.0.30[.0]

 *    1.0.38                  10    10038  10.so.0.38[.0]

 *    1.2.30                  13    10230  12.so.0.30[.0]

 *    1.0.39rc01-03           10    10039  10.so.0.39[.0]

 *    1.2.31rc01-03           13    10231  12.so.0.31[.0]

 *    1.0.39                  10    10039  10.so.0.39[.0]

 *    1.2.31                  13    10231  12.so.0.31[.0]

 *    1.2.32beta01-02         13    10232  12.so.0.32[.0]

 *    1.0.40rc01              10    10040  10.so.0.40[.0]

 *    1.2.32rc01              13    10232  12.so.0.32[.0]

 *    1.0.40                  10    10040  10.so.0.40[.0]

 *    1.2.32                  13    10232  12.so.0.32[.0]

 *

 *    Henceforth the source version will match the shared-library major

 *    and minor numbers; the shared-library major version number will be

 *    used for changes in backward compatibility, as it is intended.  The

 *    PNG_LIBPNG_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).  Beta versions

 *    were given the previous public release number plus a letter, until

 *    version 1.0.6j; from then on they were given the upcoming public

 *    release number plus "betaNN" or "rcNN".

 *

 *    Binary incompatibility exists only when applications make direct access

 *    to the info_ptr or png_ptr members through png.h, and the compiled

 *    application is loaded with a different version of the library.

 *

 *    DLLNUM will change each time there are forward or backward changes

 *    in binary compatibility (e.g., when a new feature is added).

 *

 * See libpng.txt or libpng.3 for more information.  The PNG specification

 * is available as a W3C Recommendation and as an ISO Specification,

 * <http://www.w3.org/TR/2003/REC-PNG-20031110/

 */

/*

 * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:

 *

 * If you modify libpng you may insert additional notices immediately following

 * this sentence.

 *

 * libpng versions 1.2.6, August 15, 2004, through 1.2.32, September 18, 2008, 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:

 *

 *    Cosmin Truta

 *

 * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are

 * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are

 * distributed according to the same disclaimer and license as libpng-1.0.6

 * with the following individuals added to the list of Contributing Authors:

 *

 *    Simon-Pierre Cadieux

 *    Eric S. Raymond

 *    Gilles Vollant

 *

 * and with the following additions to the disclaimer:

 *

 *    There is no warranty against interference with your enjoyment of the

 *    library or against infringement.  There is no warranty that our

 *    efforts or the library will fulfill any of your particular purposes

 *    or needs.  This library is provided with all faults, and the entire

 *    risk of satisfactory quality, performance, accuracy, and effort is with

 *    the user.

 *

 * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are

 * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are

 * distributed according to the same disclaimer and license as libpng-0.96,

 * with the following individuals added to the list of Contributing Authors:

 *

 *    Tom Lane

 *    Glenn Randers-Pehrson

 *    Willem van Schaik

 *

 * libpng versions 0.89, June 1996, through 0.96, May 1997, are

 * Copyright (c) 1996, 1997 Andreas Dilger

 * Distributed according to the same disclaimer and license as libpng-0.88,

 * with the following individuals added to the list of Contributing Authors:

 *

 *    John Bowler

 *    Kevin Bracey

 *    Sam Bushell

 *    Magnus Holmgren

 *    Greg Roelofs

 *    Tom Tanner

 *

 * libpng versions 0.5, May 1995, through 0.88, January 1996, are

 * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.

 *

 * For the purposes of this copyright and license, "Contributing Authors"

 * is defined as the following set of individuals:

 *

 *    Andreas Dilger

 *    Dave Martindale

 *    Guy Eric Schalnat

 *    Paul Schmidt

 *    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

 * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).

 */

/*

 * 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:

 * =========================

 *

 *    September 18, 2008

 *

 *    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 1.2.32 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

 *    that will hold years up to 65535.  The other two hold the date in text

 *    format, and will hold years up to 9999.

 *

 *    The integer is

 *        "png_uint_16 year" in png_time_struct.

 *

 *    The strings are

 *        "png_charp time_buffer" in png_struct and

 *        "near_time_buffer", which is a local character string in png.c.

 *

 *    There are seven time-related functions:

 *        png.c: png_convert_to_rfc_1123() in png.c

 *          (formerly png_convert_to_rfc_1152() in error)

 *        png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c

 *        png_convert_from_time_t() in pngwrite.c

 *        png_get_tIME() in pngget.c

 *        png_handle_tIME() in pngrutil.c, called in pngread.c

 *        png_set_tIME() in pngset.c

 *        png_write_tIME() in pngwutil.c, called in pngwrite.c

 *

 *    All handle dates properly in a Y2K environment.  The

 *    png_convert_from_time_t() function calls gmtime() to convert from system

 *    clock time, which returns (year - 1900), which we properly convert to

 *    the full 4-digit year.  There is a possibility that applications using

 *    libpng are not passing 4-digit years into the png_convert_to_rfc_1123()

 *    function, or that they are incorrectly passing only a 2-digit year

 *    instead of "year - 1900" into the png_convert_from_struct_tm() function,

 *    but this is not under our control.  The libpng documentation has always

 *    stated that it works with 4-digit years, and the APIs have been

 *    documented as such.

 *

 *    The tIME chunk itself is also Y2K compliant.  It uses a 2-byte unsigned

 *    integer to hold the year, and can hold years as large as 65535.

 *

 *    zlib, upon which libpng depends, is also Y2K compliant.  It contains

 *    no date-related code.

 *

 *       Glenn Randers-Pehrson

 *       libpng maintainer

 *       PNG Development Group

 */

#ifndef PNG_H

#define PNG_H

/* This is not the place to learn how to use libpng.  The file libpng.txt

 * describes how to use libpng, and the file example.c summarizes it

 * with some code on which to build.  This file is useful for looking

 * at the actual function definitions and structure components.

 */

/* Version information for png.h - this should match the version in png.c */

#define PNG_LIBPNG_VER_STRING "1.2.32"

#define PNG_HEADER_VERSION_STRING \

   " libpng version 1.2.32 - September 18, 2008\n"

#define PNG_LIBPNG_VER_SONUM   0

#define PNG_LIBPNG_VER_DLLNUM  13

/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */

#define PNG_LIBPNG_VER_MAJOR   1

#define PNG_LIBPNG_VER_MINOR   2

#define PNG_LIBPNG_VER_RELEASE 32

/* This should match the numeric part of the final component of

 * PNG_LIBPNG_VER_STRING, omitting any leading zero: */

#define PNG_LIBPNG_VER_BUILD  0

/* Release Status */

#define PNG_LIBPNG_BUILD_ALPHA    1

#define PNG_LIBPNG_BUILD_BETA     2

#define PNG_LIBPNG_BUILD_RC       3

#define PNG_LIBPNG_BUILD_STABLE   4

#define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7

/* Release-Specific Flags */

#define PNG_LIBPNG_BUILD_PATCH    8 /* Can be OR'ed with

                                       PNG_LIBPNG_BUILD_STABLE only */

#define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with

                                       PNG_LIBPNG_BUILD_SPECIAL */

#define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with

                                       PNG_LIBPNG_BUILD_PRIVATE */

#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE

/* Careful here.  At one time, Guy wanted to use 082, but that would be octal.

 * We must not include leading zeros.

 * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only

 * version 1.0.0 was mis-numbered 100 instead of 10000).  From

 * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release */

#define PNG_LIBPNG_VER 10232 /* 1.2.32 */

#ifndef PNG_VERSION_INFO_ONLY

/* include the compression library's header */

#include "zlib.h"

#endif

/* include all user configurable info, including optional assembler routines */

#include "pngconf.h"

/*

 * Added at libpng-1.2.8 */

/* Ref MSDN: Private as priority over Special

 * VS_FF_PRIVATEBUILD File *was not* built using standard release

 * procedures. If this value is given, the StringFileInfo block must

 * contain a PrivateBuild string. 

 *

 * VS_FF_SPECIALBUILD File *was* built by the original company using

 * standard release procedures but is a variation of the standard

 * file of the same version number. If this value is given, the

 * StringFileInfo block must contain a SpecialBuild string. 

 */

#if defined(PNG_USER_PRIVATEBUILD)

#  define PNG_LIBPNG_BUILD_TYPE \

          (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)

#else

#  if defined(PNG_LIBPNG_SPECIALBUILD)

#    define PNG_LIBPNG_BUILD_TYPE \

            (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)

#  else

#    define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)

#  endif

#endif

#ifndef PNG_VERSION_INFO_ONLY

/* Inhibit C++ name-mangling for libpng functions but not for system calls. */

#ifdef __cplusplus

extern "C" {

#endif /* __cplusplus */

/* This file is arranged in several sections.  The first section contains

 * structure and type definitions.  The second section contains the external

 * library functions, while the third has the internal library functions,

 * which applications aren't expected to use directly.

 */

#ifndef PNG_NO_TYPECAST_NULL

#define int_p_NULL                (int *)NULL

#define png_bytep_NULL            (png_bytep)NULL

#define png_bytepp_NULL           (png_bytepp)NULL

#define png_doublep_NULL          (png_doublep)NULL

#define png_error_ptr_NULL        (png_error_ptr)NULL

#define png_flush_ptr_NULL        (png_flush_ptr)NULL

#define png_free_ptr_NULL         (png_free_ptr)NULL

#define png_infopp_NULL           (png_infopp)NULL

#define png_malloc_ptr_NULL       (png_malloc_ptr)NULL

#define png_read_status_ptr_NULL  (png_read_status_ptr)NULL

#define png_rw_ptr_NULL           (png_rw_ptr)NULL

#define png_structp_NULL          (png_structp)NULL

#define png_uint_16p_NULL         (png_uint_16p)NULL

#define png_voidp_NULL            (png_voidp)NULL

#define png_write_status_ptr_NULL (png_write_status_ptr)NULL

#else

#define int_p_NULL                NULL

#define png_bytep_NULL            NULL

#define png_bytepp_NULL           NULL

#define png_doublep_NULL          NULL

#define png_error_ptr_NULL        NULL

#define png_flush_ptr_NULL        NULL

#define png_free_ptr_NULL         NULL

#define png_infopp_NULL           NULL

#define png_malloc_ptr_NULL       NULL

#define png_read_status_ptr_NULL  NULL

#define png_rw_ptr_NULL           NULL

#define png_structp_NULL          NULL

#define png_uint_16p_NULL         NULL