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#include "pbm.h"
/* By Bryan Henderson, San Jose CA 2003.09.06.
Contributed to the public domain by its author.
This is a replacement of Joseph Sheedy's (hbarover2@yahoo.com) Perl
program of the same name, distributed in his Pbmtomatrixorbital
package. This version uses Netpbm libraries and is fully
consistent with other Netpbm programs.
*/
static void
generateMo(FILE * const ofP,
bit ** const bits,
int const cols,
int const rows) {
unsigned int col;
fputc(cols, ofP);
fputc(rows, ofP);
for (col = 0; col < cols; ++col) {
unsigned int row;
unsigned int outbitpos;
unsigned char outchar;
outbitpos = 0; /* Start at 1st bit of 1st output byte */
for (row = 0; row < rows; ++row) {
if (outbitpos == 0)
/* We're starting a new byte; initialize it to zeroes */
outchar = 0;
outchar |= bits[row][col] << outbitpos;
if (outbitpos == 7)
/* We filled up a byte. Output it. */
fputc(outchar, ofP);
outbitpos = (outbitpos + 1) % 8;
}
if (outbitpos != 0)
/* Our last byte is partial, so must be output now. */
fputc(outchar, ofP);
}
}
int
main(int argc, char * argv[]) {
FILE* ifp;
bit** bits;
int rows, cols;
const char * inputFilename;
pbm_init(&argc, argv);
if (argc-1 > 0)
pm_error("Too many arguments (%d). The only valid argument is an "
"input file name.", argc-1);
else if (argc-1 == 1)
inputFilename = argv[1];
else
inputFilename = "-";
ifp = pm_openr(inputFilename);
bits = pbm_readpbm(ifp, &cols, &rows);
if (rows > 255)
pm_error("Image is too high: %d rows. Max height: 255 rows", rows);
if (cols > 255)
pm_error("Image is too wide: %d cols. Max width: 255 cols", cols);
generateMo(stdout, bits, cols, rows);
pm_close(ifp);
pbm_freearray(bits, rows);
exit(0);
}
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