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comparison ext/libpng-1.2.29/contrib/gregbook/readpng2.h @ 89:fa33cda75471

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* Reverting back to 2543 as requested by sleek
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Sat, 19 Jul 2008 11:38:52 +0000
parents 4a0efb7baf70
children
comparison
equal deleted inserted replaced
88:1c2842ebe393 89:fa33cda75471
1 /*---------------------------------------------------------------------------
2
3 rpng2 - progressive-model PNG display program readpng2.h
4
5 ---------------------------------------------------------------------------
6
7 Copyright (c) 1998-2008 Greg Roelofs. All rights reserved.
8
9 This software is provided "as is," without warranty of any kind,
10 express or implied. In no event shall the author or contributors
11 be held liable for any damages arising in any way from the use of
12 this software.
13
14 The contents of this file are DUAL-LICENSED. You may modify and/or
15 redistribute this software according to the terms of one of the
16 following two licenses (at your option):
17
18
19 LICENSE 1 ("BSD-like with advertising clause"):
20
21 Permission is granted to anyone to use this software for any purpose,
22 including commercial applications, and to alter it and redistribute
23 it freely, subject to the following restrictions:
24
25 1. Redistributions of source code must retain the above copyright
26 notice, disclaimer, and this list of conditions.
27 2. Redistributions in binary form must reproduce the above copyright
28 notice, disclaimer, and this list of conditions in the documenta-
29 tion and/or other materials provided with the distribution.
30 3. All advertising materials mentioning features or use of this
31 software must display the following acknowledgment:
32
33 This product includes software developed by Greg Roelofs
34 and contributors for the book, "PNG: The Definitive Guide,"
35 published by O'Reilly and Associates.
36
37
38 LICENSE 2 (GNU GPL v2 or later):
39
40 This program is free software; you can redistribute it and/or modify
41 it under the terms of the GNU General Public License as published by
42 the Free Software Foundation; either version 2 of the License, or
43 (at your option) any later version.
44
45 This program is distributed in the hope that it will be useful,
46 but WITHOUT ANY WARRANTY; without even the implied warranty of
47 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
48 GNU General Public License for more details.
49
50 You should have received a copy of the GNU General Public License
51 along with this program; if not, write to the Free Software Foundation,
52 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
53
54 ---------------------------------------------------------------------------*/
55
56 #ifndef TRUE
57 # define TRUE 1
58 # define FALSE 0
59 #endif
60
61 #ifndef MAX
62 # define MAX(a,b) ((a) > (b)? (a) : (b))
63 # define MIN(a,b) ((a) < (b)? (a) : (b))
64 #endif
65
66 #ifdef DEBUG
67 # define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);}
68 #else
69 # define Trace(x) ;
70 #endif
71
72 enum rpng2_states {
73 kPreInit = 0,
74 kWindowInit,
75 kDone
76 };
77
78 typedef unsigned char uch;
79 typedef unsigned short ush;
80 typedef unsigned long ulg;
81
82 typedef struct _mainprog_info {
83 double display_exponent;
84 ulg width;
85 ulg height;
86 void *png_ptr;
87 void *info_ptr;
88 void (*mainprog_init)(void);
89 void (*mainprog_display_row)(ulg row_num);
90 void (*mainprog_finish_display)(void);
91 uch *image_data;
92 uch **row_pointers;
93 jmp_buf jmpbuf;
94 int passes; /* not used */
95 int pass;
96 int rowbytes;
97 int channels;
98 int need_bgcolor;
99 #if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
100 int nommxfilters;
101 int nommxcombine;
102 int nommxinterlace;
103 #endif
104 int state;
105 uch bg_red;
106 uch bg_green;
107 uch bg_blue;
108 } mainprog_info;
109
110
111 /* prototypes for public functions in readpng2.c */
112
113 void readpng2_version_info(void);
114
115 int readpng2_check_sig(uch *sig, int num);
116
117 int readpng2_init(mainprog_info *mainprog_ptr);
118
119 int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length);
120
121 void readpng2_cleanup(mainprog_info *mainprog_ptr);