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116 lines
3.7 KiB
116 lines
3.7 KiB
/*--------------------------------------------------------------------------- |
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rpng2 - progressive-model PNG display program readpng2.h |
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--------------------------------------------------------------------------- |
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Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. |
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This software is provided "as is," without warranty of any kind, |
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express or implied. In no event shall the author or contributors |
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be held liable for any damages arising in any way from the use of |
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this software. |
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The contents of this file are DUAL-LICENSED. You may modify and/or |
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redistribute this software according to the terms of one of the |
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following two licenses (at your option): |
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LICENSE 1 ("BSD-like with advertising clause"): |
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Permission is granted to anyone to use this software for any purpose, |
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including commercial applications, and to alter it and redistribute |
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it freely, subject to the following restrictions: |
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1. Redistributions of source code must retain the above copyright |
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notice, disclaimer, and this list of conditions. |
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2. Redistributions in binary form must reproduce the above copyright |
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notice, disclaimer, and this list of conditions in the documenta- |
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tion and/or other materials provided with the distribution. |
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3. All advertising materials mentioning features or use of this |
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software must display the following acknowledgment: |
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This product includes software developed by Greg Roelofs |
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and contributors for the book, "PNG: The Definitive Guide," |
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published by O'Reilly and Associates. |
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LICENSE 2 (GNU GPL v2 or later): |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software Foundation, |
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Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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---------------------------------------------------------------------------*/ |
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#ifndef TRUE |
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# define TRUE 1 |
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# define FALSE 0 |
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#endif |
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#ifndef MAX |
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# define MAX(a,b) ((a) > (b)? (a) : (b)) |
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# define MIN(a,b) ((a) < (b)? (a) : (b)) |
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#endif |
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#ifdef DEBUG |
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# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} |
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#else |
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# define Trace(x) ; |
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#endif |
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enum rpng2_states { |
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kPreInit = 0, |
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kWindowInit, |
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kDone |
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}; |
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typedef unsigned char uch; |
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typedef unsigned short ush; |
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typedef unsigned long ulg; |
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typedef struct _mainprog_info { |
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double display_exponent; |
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ulg width; |
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ulg height; |
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void *png_ptr; |
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void *info_ptr; |
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void (*mainprog_init)(void); |
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void (*mainprog_display_row)(ulg row_num); |
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void (*mainprog_finish_display)(void); |
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uch *image_data; |
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uch **row_pointers; |
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jmp_buf jmpbuf; |
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int passes; /* not used */ |
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int pass; |
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int rowbytes; |
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int channels; |
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int need_bgcolor; |
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int state; |
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uch bg_red; |
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uch bg_green; |
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uch bg_blue; |
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} mainprog_info; |
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/* prototypes for public functions in readpng2.c */ |
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void readpng2_version_info(void); |
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int readpng2_check_sig(uch *sig, int num); |
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int readpng2_init(mainprog_info *mainprog_ptr); |
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int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length); |
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void readpng2_cleanup(mainprog_info *mainprog_ptr);
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