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116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/*---------------------------------------------------------------------------
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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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