| 1 | /*--------------------------------------------------------------------------- |
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| 2 | |
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| 3 | rpng - simple PNG display program readpng.h |
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| 4 | |
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| 5 | --------------------------------------------------------------------------- |
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| 6 | |
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| 7 | Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. |
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| 8 | |
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| 9 | This software is provided "as is," without warranty of any kind, |
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| 10 | express or implied. In no event shall the author or contributors |
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| 11 | be held liable for any damages arising in any way from the use of |
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| 12 | this software. |
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| 13 | |
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| 14 | The contents of this file are DUAL-LICENSED. You may modify and/or |
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| 15 | redistribute this software according to the terms of one of the |
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| 16 | following two licenses (at your option): |
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| 17 | |
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| 18 | |
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| 19 | LICENSE 1 ("BSD-like with advertising clause"): |
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| 20 | |
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| 21 | Permission is granted to anyone to use this software for any purpose, |
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| 22 | including commercial applications, and to alter it and redistribute |
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| 23 | it freely, subject to the following restrictions: |
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| 24 | |
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| 25 | 1. Redistributions of source code must retain the above copyright |
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| 26 | notice, disclaimer, and this list of conditions. |
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| 27 | 2. Redistributions in binary form must reproduce the above copyright |
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| 28 | notice, disclaimer, and this list of conditions in the documenta- |
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| 29 | tion and/or other materials provided with the distribution. |
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| 30 | 3. All advertising materials mentioning features or use of this |
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| 31 | software must display the following acknowledgment: |
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| 32 | |
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| 33 | This product includes software developed by Greg Roelofs |
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| 34 | and contributors for the book, "PNG: The Definitive Guide," |
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| 35 | published by O'Reilly and Associates. |
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| 36 | |
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| 37 | |
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| 38 | LICENSE 2 (GNU GPL v2 or later): |
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| 39 | |
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| 40 | This program is free software; you can redistribute it and/or modify |
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| 41 | it under the terms of the GNU General Public License as published by |
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| 42 | the Free Software Foundation; either version 2 of the License, or |
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| 43 | (at your option) any later version. |
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| 44 | |
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| 45 | This program is distributed in the hope that it will be useful, |
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| 46 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 47 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 48 | GNU General Public License for more details. |
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| 49 | |
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| 50 | You should have received a copy of the GNU General Public License |
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| 51 | along with this program; if not, write to the Free Software Foundation, |
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| 52 | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 53 | |
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| 54 | ---------------------------------------------------------------------------*/ |
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| 55 | |
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| 56 | #ifndef TRUE |
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| 57 | # define TRUE 1 |
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| 58 | # define FALSE 0 |
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| 59 | #endif |
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| 60 | |
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| 61 | #ifndef MAX |
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| 62 | # define MAX(a,b) ((a) > (b)? (a) : (b)) |
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| 63 | # define MIN(a,b) ((a) < (b)? (a) : (b)) |
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| 64 | #endif |
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| 65 | |
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| 66 | #ifdef DEBUG |
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| 67 | # define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} |
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| 68 | #else |
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| 69 | # define Trace(x) ; |
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| 70 | #endif |
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| 71 | |
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| 72 | typedef unsigned char uch; |
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| 73 | typedef unsigned short ush; |
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| 74 | typedef unsigned long ulg; |
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| 75 | |
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| 76 | |
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| 77 | /* prototypes for public functions in readpng.c */ |
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| 78 | |
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| 79 | void readpng_version_info(void); |
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| 80 | |
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| 81 | int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight); |
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| 82 | |
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| 83 | int readpng_get_bgcolor(uch *bg_red, uch *bg_green, uch *bg_blue); |
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| 84 | |
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| 85 | uch *readpng_get_image(double display_exponent, int *pChannels, |
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| 86 | ulg *pRowbytes); |
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| 87 | |
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| 88 | void readpng_cleanup(int free_image_data); |
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