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/****************************************************************************
*
* MODULE: bitmap
* AUTHOR(S): David Gerdes (CERL) (original contributor)
* Markus Neteler <neteler itc.it>,
* Bernhard Reiter <bernhard intevation.de>,
* Brad Douglas <rez touchofmadness.com>,
* Glynn Clements <glynn gclements.plus.com>
* PURPOSE: provides basic support for the creation and manipulation of
* two dimensional bitmap arrays
* COPYRIGHT: (C) 1999-2006 by the GRASS Development Team
*
* This program is free software under the GNU General Public
* License (>=v2). Read the file COPYING that comes with GRASS
* for details.
*
*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <grass/bitmap.h>
static int dump_map(struct BM *map);
int main(int argc, char *argv[])
{
int SIZE;
struct BM *map, *map2;
int i, x, y;
int dump;
FILE *fp;
if (argc < 2)
SIZE = 11;
else
SIZE = atoi(argv[1]);
if (NULL != getenv("NODUMP"))
dump = 0;
else
dump = 1;
map = BM_create(SIZE, SIZE);
/* turn on bits in X pattern */
for (i = 0; i < SIZE; i++) {
BM_set(map, i, i, 1);
BM_set(map, (SIZE - 1) - i, i, 1);
}
if (dump)
dump_map(map);
fprintf(stdout, "Size = %d\n", BM_get_map_size(map));
fprintf(stdout, "\n\n");
/* now invert it */
for (y = 0; y < SIZE; y++)
for (x = 0; x < SIZE; x++)
BM_set(map, x, y, !BM_get(map, x, y));
if (dump)
dump_map(map);
fprintf(stdout, "Size = %d\n", BM_get_map_size(map));
{
fp = fopen("dumpfile", "w");
BM_file_write(fp, map);
fclose(fp);
fp = fopen("dumpfile", "r");
map2 = BM_file_read(fp);
fclose(fp);
dump_map(map2);
}
BM_destroy(map);
BM_destroy(map2);
return 0;
}
static int dump_map(struct BM *map)
{
int x, y;
for (y = 0; y < map->rows; y++) {
for (x = 0; x < map->cols; x++) {
fprintf(stdout, "%c", BM_get(map, x, y) ? '#' : '.');
}
fprintf(stdout, "\n");
}
}
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