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/* ----------------------------------------------------------------------
*
* Convert an AVS X image to a PAM image
*
* By Scott Pakin <scott+pbm@pakin.org>
*
* ----------------------------------------------------------------------
*
* Copyright (C) 2010 Scott Pakin <scott+pbm@pakin.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* ----------------------------------------------------------------------
*/
#include <stdio.h>
#include "pm.h"
#include "pam.h"
static void
producePam(FILE * const avsFileP,
struct pam * const pamP) {
tuple * tuplerow;
unsigned int row;
tuplerow = pnm_allocpamrow(pamP);
for (row = 0; row < pamP->height; ++row) {
unsigned int col;
for (col = 0; col < pamP->width; ++col) {
tuple const thisTuple = tuplerow[col];
unsigned char c;
pm_readcharu(avsFileP, &c); thisTuple[3] = c;
pm_readcharu(avsFileP, &c); thisTuple[0] = c;
pm_readcharu(avsFileP, &c); thisTuple[1] = c;
pm_readcharu(avsFileP, &c); thisTuple[2] = c;
}
pnm_writepamrow(pamP, tuplerow);
}
pnm_freepamrow(tuplerow);
}
int
main(int argc, const char *argv[]) {
const char * comment = "Produced by avstopam"; /* constant */
struct pam outPam;
const char * inputFilename;
FILE * inFileP;
long width;
long height;
pm_proginit(&argc, argv);
inputFilename = (argc > 1) ? argv[1] : "-";
inFileP = pm_openr(inputFilename);
pm_readbiglong(inFileP, &width);
pm_readbiglong(inFileP, &height);
outPam.size = sizeof(struct pam);
outPam.len = PAM_STRUCT_SIZE(comment_p);
outPam.file = stdout;
outPam.format = PAM_FORMAT;
outPam.plainformat = 0;
outPam.width = width;
outPam.height = height;
outPam.depth = 4;
outPam.maxval = 255;
outPam.bytes_per_sample = 1;
sprintf(outPam.tuple_type, "RGB_ALPHA");
outPam.allocation_depth = 4;
outPam.comment_p = &comment;
/* Produce a PAM output header. Note that AVS files *always*
contain four channels with one byte per channel.
*/
pnm_writepaminit(&outPam);
producePam(inFileP, &outPam);
pm_closer(inFileP);
return 0;
}
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