1 /*--------------------------------------------------------------------------- 2 3 wpng - simple PNG-writing program writepng.h 4 5 --------------------------------------------------------------------------- 6 7 Copyright (c) 1998-2007 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 #define TEXT_TITLE 0x01 73 #define TEXT_AUTHOR 0x02 74 #define TEXT_DESC 0x04 75 #define TEXT_COPY 0x08 76 #define TEXT_EMAIL 0x10 77 #define TEXT_URL 0x20 78 79 #define TEXT_TITLE_OFFSET 0 80 #define TEXT_AUTHOR_OFFSET 72 81 #define TEXT_COPY_OFFSET (2*72) 82 #define TEXT_EMAIL_OFFSET (3*72) 83 #define TEXT_URL_OFFSET (4*72) 84 #define TEXT_DESC_OFFSET (5*72) 85 86 typedef unsigned char uch; 87 typedef unsigned short ush; 88 typedef unsigned long ulg; 89 90 typedef struct _mainprog_info { 91 double gamma; 92 long width; 93 long height; 94 time_t modtime; 95 FILE *infile; 96 FILE *outfile; 97 void *png_ptr; 98 void *info_ptr; 99 uch *image_data; 100 uch **row_pointers; 101 char *title; 102 char *author; 103 char *desc; 104 char *copyright; 105 char *email; 106 char *url; 107 int filter; /* command-line-filter flag, not PNG row filter! */ 108 int pnmtype; 109 int sample_depth; 110 int interlaced; 111 int have_bg; 112 int have_time; 113 int have_text; 114 jmp_buf jmpbuf; 115 uch bg_red; 116 uch bg_green; 117 uch bg_blue; 118 } mainprog_info; 119 120 121 /* prototypes for public functions in writepng.c */ 122 123 void writepng_version_info(void); 124 125 int writepng_init(mainprog_info *mainprog_ptr); 126 127 int writepng_encode_image(mainprog_info *mainprog_ptr); 128 129 int writepng_encode_row(mainprog_info *mainprog_ptr); 130 131 int writepng_encode_finish(mainprog_info *mainprog_ptr); 132 133 void writepng_cleanup(mainprog_info *mainprog_ptr); 134