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/* pbmtowbmp.c - convert a portable bitmap to a Wireless Bitmap file
This is derived for Netpbm from the pbmwbmp package from
<http://www.looplab.com/wap/tools> on 2000.06.06.
The specifications for the wbmp format are part of the Wireless
Application Environment specification at
<http://www.wapforum.org/what/technical.htm>.
** Copyright (C) 1999 Terje Sannum <terje@looplab.com>.
**
** 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 "pbm.h"
static void
outputint(int i) {
int c = 1;
while(i & 0x7f << 7*c) c++;
while(c > 1) putchar(0x80 | ((i >> 7*--c) & 0xff));
putchar(i & 0x7f);
}
int
main(int argc, char *argv[]) {
FILE *f;
bit **image;
int rows, cols, row, col;
int c, p;
pbm_init(&argc, argv);
if(argc > 2) {
fprintf(stderr, "Copyright (C) 1999 Terje Sannum <terje@looplab.com>\n");
pm_usage("[pbmfile]");
}
f = argc == 2 ? pm_openr(argv[1]) : stdin;
image = pbm_readpbm(f, &cols, &rows);
pm_close(f);
/* Header */
putchar(0); /* Type 0: B/W, no compression */
putchar(0); /* FixHeaderField */
/* Geometry */
outputint(cols);
outputint(rows);
/* Image data */
for(row = 0; row < rows; row++) {
p = c = 0;
for(col = 0; col < cols; col++) {
if(image[row][col] == PBM_WHITE) c = c | (1 << (7-p));
if(++p == 8) {
putchar(c);
p = c = 0;
}
}
if(p) putchar(c);
}
return 0;
}
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