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/* sirtopnm.c - read a Solitaire Image Recorder file and write a portable anymap
**
** Copyright (C) 1991 by Marvin Landis.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
*/
#include <stdbool.h>
#include <assert.h>
#include "mallocvar.h"
#include "pnm.h"
static void
readSirHeader(FILE * const ifP,
int * const formatP,
unsigned int * const rowsP,
unsigned int * const colsP) {
short info;
pm_readlittleshort(ifP, &info);
if (info != 0x3a4f)
pm_error( "Input file is not a Solitaire file");
pm_readlittleshort(ifP, &info);
pm_readlittleshort(ifP, &info);
if (info == 17)
*formatP = PGM_TYPE;
else if (info == 11)
*formatP = PPM_TYPE;
else
pm_error( "Input is not MGI TYPE 11 or MGI TYPE 17" );
pm_readlittleshort(ifP, &info);
*colsP = info;
pm_readlittleshort(ifP, &info);
*rowsP = info;
{
unsigned int i;
for (i = 1; i < 1531; ++i)
pm_readlittleshort(ifP, &info);
}
}
static void
convertPgm(FILE * const ifP,
FILE * const ofP,
unsigned int const rows,
unsigned int const cols,
xel * const xelrow) {
unsigned int row;
pm_message("Writing a PGM file");
for (row = 0; row < rows; ++row) {
unsigned int col;
for (col = 0; col < cols; ++col)
PNM_ASSIGN1(xelrow[col], fgetc(ifP));
pnm_writepnmrow(ofP, xelrow, cols, 255, PGM_TYPE, 0);
}
}
static void
convertPpm(FILE * const ifP,
FILE * const ofP,
unsigned int const rows,
unsigned int const cols,
xel * const xelrow) {
unsigned int const picsize = cols * rows * 3;
unsigned int const planesize = cols * rows;
unsigned char * sirarray; /* malloc'ed array */
unsigned int row;
if (UINT_MAX/cols/rows < 3)
pm_error("Image is too large (%u x %u x %u) for computation",
cols, rows, 3);
MALLOCARRAY(sirarray, picsize);
if (!sirarray)
pm_error( "Not enough memory to load %u x %u x %u SIR file",
cols, rows, 3);
if (fread(sirarray, 1, picsize, ifP) != picsize)
pm_error("Error reading SIR file");
pm_message("Writing a PPM file");
for (row = 0; row < rows; ++row) {
unsigned int col;
for (col = 0; col < cols; col++)
PPM_ASSIGN(xelrow[col], sirarray[row*cols+col],
sirarray[planesize + (row*cols+col)],
sirarray[2*planesize + (row*cols+col)]);
pnm_writepnmrow(ofP, xelrow, cols, 255, PPM_TYPE, 0);
}
free(sirarray);
}
int
main(int argc, const char ** argv) {
FILE * ifP;
xel * xelrow;
unsigned int rows, cols;
int format;
pm_proginit(&argc, argv);
if (argc-1 > 1)
pm_error ("Too many arguments. The only possible argument is "
"the input file name");
else if (argc-1 >= 1)
ifP = pm_openr(argv[1]);
else
ifP = stdin;
readSirHeader(ifP, &format, &rows, &cols);
pnm_writepnminit(stdout, cols, rows, 255, format, 0);
xelrow = pnm_allocrow(cols);
switch (PNM_FORMAT_TYPE(format)) {
case PGM_TYPE:
convertPgm(ifP, stdout, rows, cols, xelrow);
break;
case PPM_TYPE:
convertPpm(ifP, stdout, rows, cols, xelrow);
break;
default:
assert(false);
}
pnm_freerow(xelrow);
pm_close(ifP);
exit(0);
}
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