1999-10-14 08:43:10 -04:00
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/*---------------------------------------------------------------------------
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wpng - simple PNG-writing program writepng.h
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---------------------------------------------------------------------------
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2000-03-21 06:13:06 -05:00
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Copyright (c) 1998-2000 Greg Roelofs. All rights reserved.
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1999-10-14 08:43:10 -04:00
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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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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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---------------------------------------------------------------------------*/
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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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#define TEXT_TITLE 0x01
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#define TEXT_AUTHOR 0x02
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#define TEXT_DESC 0x04
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#define TEXT_COPY 0x08
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#define TEXT_EMAIL 0x10
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#define TEXT_URL 0x20
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#define TEXT_TITLE_OFFSET 0
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#define TEXT_AUTHOR_OFFSET 72
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#define TEXT_COPY_OFFSET (2*72)
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#define TEXT_EMAIL_OFFSET (3*72)
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#define TEXT_URL_OFFSET (4*72)
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#define TEXT_DESC_OFFSET (5*72)
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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 gamma;
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long width;
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long height;
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time_t modtime;
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FILE *infile;
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FILE *outfile;
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void *png_ptr;
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void *info_ptr;
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uch *image_data;
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uch **row_pointers;
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char *title;
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char *author;
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char *desc;
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char *copyright;
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char *email;
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char *url;
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int filter; /* command-line-filter flag, not PNG row filter! */
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int pnmtype;
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int sample_depth;
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int interlaced;
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int have_bg;
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int have_time;
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int have_text;
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jmp_buf jmpbuf;
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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 writepng.c */
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void writepng_version_info(void);
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int writepng_init(mainprog_info *mainprog_ptr);
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int writepng_encode_image(mainprog_info *mainprog_ptr);
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int writepng_encode_row(mainprog_info *mainprog_ptr);
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int writepng_encode_finish(mainprog_info *mainprog_ptr);
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void writepng_cleanup(mainprog_info *mainprog_ptr);
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