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/*
* pgm-deinterlace - combine separate, h-interlaced PGMs into one
* Copyright (c) 2015 David Phillips <dbphillipsnz@gmail.com>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "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 OR CONTRIBUTORS 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.
*/
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
unsigned int i, x, y, size, header_size;
unsigned int clust_total = argc-1;
char buffer[4096];
FILE **f = NULL;
if (argc == 1)
{
fprintf(stderr, "%s [image 0] [image[1] ...\n", argv[0]);
return 1;
}
if ( (f = malloc(sizeof(FILE*)*(clust_total)) ) == NULL)
{
perror("malloc");
return 1;
}
for (i = 1; i < argc; i++)
{
if ((f[i-1] = fopen(argv[i], "r")) == NULL)
{
perror("fopen");
/* close those files already opened */
i--;
for ( ; i > 1; i--)
fclose(f[i-1]);
return 1;
}
}
/* Fetch sizes from */
/* FIXME doesn't check magic value */
/* FIXME extremely hackish, relies on specific whitespace format */
fgets(buffer, sizeof(buffer), f[0]);
fgets(buffer, sizeof(buffer), f[0]);
fgets(buffer, sizeof(buffer), f[0]);
size = atoi(buffer);
fprintf(stderr, "Full image size will be %dx%d, using %d images\n", size, size, clust_total);
fgets(buffer, sizeof(buffer), f[0]);
header_size = ftell(f[0]);
for (i = 1; i < argc; i++)
fseek(f[i-1], header_size, SEEK_SET);
/* Output PGM Header */
printf("P5\n%d\n%d\n255\n", size, size);
/* FIXME use a buffer
* FIXME check for EOF */
for (y = 0; y < size; y++)
for (x = 0; x < size; x++)
putchar(fgetc(f[x%clust_total]));
for (i = 1; i < argc; i++)
fclose(f[i-1]);
free(f);
return 0;
}
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