The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 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; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 99 | int state; |
| 100 | uch bg_red; |
| 101 | uch bg_green; |
| 102 | uch bg_blue; |
| 103 | } mainprog_info; |
| 104 | |
| 105 | |
| 106 | /* prototypes for public functions in readpng2.c */ |
| 107 | |
| 108 | void readpng2_version_info(void); |
| 109 | |
| 110 | int readpng2_check_sig(uch *sig, int num); |
| 111 | |
| 112 | int readpng2_init(mainprog_info *mainprog_ptr); |
| 113 | |
| 114 | int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length); |
| 115 | |
| 116 | void readpng2_cleanup(mainprog_info *mainprog_ptr); |