| 1 | /*---------------------------------------------------------------------------
|
|---|
| 2 |
|
|---|
| 3 | rpng - simple PNG display program readpng.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 | typedef unsigned char uch;
|
|---|
| 73 | typedef unsigned short ush;
|
|---|
| 74 | typedef unsigned long ulg;
|
|---|
| 75 |
|
|---|
| 76 |
|
|---|
| 77 | /* prototypes for public functions in readpng.c */
|
|---|
| 78 |
|
|---|
| 79 | void readpng_version_info(void);
|
|---|
| 80 |
|
|---|
| 81 | int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight);
|
|---|
| 82 |
|
|---|
| 83 | int readpng_get_bgcolor(uch *bg_red, uch *bg_green, uch *bg_blue);
|
|---|
| 84 |
|
|---|
| 85 | uch *readpng_get_image(double display_exponent, int *pChannels,
|
|---|
| 86 | ulg *pRowbytes);
|
|---|
| 87 |
|
|---|
| 88 | void readpng_cleanup(int free_image_data);
|
|---|
