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static char *rcs_id = "$Id: fs1toppm.c,v 1.1 1997/03/11 03:23:12 kstailey Exp $";
/*
* Copyright (c) 1995 Kenneth Stailey
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project
* by Kenneth Stailey
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* fs1toppm.c: convert output from Ricoh FS1 into PPM format
*/
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
char fp_buf[262144];
char out_buf[262144];
void usage();
int read_rgb(FILE *, char *, int);
main(int argc, char *argv[])
{
int width;
FILE *fp;
char rgb[3];
if (argc != 4) {
usage();
exit(1);
}
width = atoi(argv[1]);
if ((fp = fopen(argv[3], "r")) == NULL) {
perror("open");
exit(-1);
}
setbuffer(fp, fp_buf, 262144);
setbuffer(stdout, out_buf, 262144);
printf("P6\n%d %d 255\n", width, atoi(argv[2]));
while(read_rgb(fp, rgb, width) != EOF) {
fwrite(rgb, 3, 1, stdout);
}
fclose(fp);
}
int read_rgb(FILE *fp, char *rgb, int width)
{
static int cur_pos = 0;
if (fseek(fp, cur_pos, SEEK_SET) != 0) {
perror("fseek red");
exit(-1);
}
if (fread(&rgb[0], 1, 1, fp) != 1)
return EOF;
if (fseek(fp, cur_pos + width, SEEK_SET) != 0) {
perror("fseek green");
exit(-1);
}
if (fread(&rgb[1], 1, 1, fp) != 1)
return EOF;
if (fseek(fp, cur_pos + width * 2, SEEK_SET) != 0) {
perror("fseek blue");
exit(-1);
}
if (fread(&rgb[2], 1, 1, fp) != 1)
return EOF;
if (++cur_pos % width == 0)
cur_pos += width * 2;
return 0;
}
void usage()
{
fprintf(stderr, "usage: fs1toppm width height fs1_file\n");
}
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