37 #include <grass/linkm.h>
38 #include <grass/bitmap.h>
41 #define BM_col_to_byte(x) ((x)/8)
42 #define BM_col_to_bit(x) ((x)%8)
44 static int Mode = BM_FLAT;
64 if (Mode == BM_SPARSE)
67 if (
NULL == (map = (
struct BM *)
malloc(
sizeof(
struct BM))))
70 map->bytes = (x + 7) / 8;
73 (map->data = (
unsigned char *)calloc(map->bytes * y,
sizeof(
char))))
158 fprintf(stderr,
"BM_set_mode: Unknown mode: %d\n", mode);
163 fprintf(stderr,
"BM_set_mode: Bad size: %d\n", size);
187 int BM_set(
struct BM *map,
int x,
int y,
int val)
191 if (x < 0 || x >= map->cols || y < 0 || y >= map->rows)
224 if (x < 0 || x >= map->cols || y < 0 || y >= map->rows)
250 return map->bytes * map->rows;
278 fwrite(&c,
sizeof(
char),
sizeof(
char), fp);
280 fwrite(BM_TEXT, BM_TEXT_LEN,
sizeof(
char), fp);
283 fwrite(&c,
sizeof(
char),
sizeof(
char), fp);
285 fwrite(&(map->rows),
sizeof(map->rows),
sizeof(
char), fp);
287 fwrite(&(map->cols),
sizeof(map->cols),
sizeof(
char), fp);
289 for (i = 0; i < map->rows; i++)
291 fwrite(&(map->data[i * map->bytes]),
sizeof(
char), map->bytes,
317 char buf[BM_TEXT_LEN + 1];
319 struct BMlink *p =
NULL, *p2;
322 if (
NULL == (map = (
struct BM *)
malloc(
sizeof(
struct BM))))
325 fread(&c,
sizeof(
char),
sizeof(
char), fp);
329 fread(buf, BM_TEXT_LEN,
sizeof(
char), fp);
331 fread(&c,
sizeof(
char),
sizeof(
char), fp);
335 fread(&(map->rows),
sizeof(map->rows),
sizeof(
char), fp);
337 fread(&(map->cols),
sizeof(map->cols),
sizeof(
char), fp);
339 map->bytes = (map->cols + 7) / 8;
341 if (map->sparse == BM_SPARSE)
344 if (
NULL == (map->data = (
unsigned char *)
malloc(map->bytes * map->rows)))
348 for (i = 0; i < map->rows; i++)
350 fread(&(map->data[i * map->bytes]),
sizeof(
char), map->bytes, fp))
359 map->token =
link_init(
sizeof(
struct BMlink));
362 if (
NULL == (map->data = (
unsigned char *)
363 malloc(
sizeof(
struct BMlink *) * map->rows)))
366 for (y = 0; y < map->rows; y++) {
368 fread(&i,
sizeof(i),
sizeof(
char), fp);
373 for (i = 0; i < cnt; i++) {
374 p2 = (
struct BMlink *)
link_new(map->token);
377 ((
struct BMlink **)(map->data))[y] = p2;
385 fread(&n,
sizeof(n),
sizeof(
char), fp);
388 fread(&n,
sizeof(n),
sizeof(
char), fp);
int BM_get(struct BM *map, int x, int y)
Gets 'val' from the bitmap.
struct link_head * link_init(int size)
struct link_head * link_new(struct link_head *Head)
int BM_file_write(FILE *fp, struct BM *map)
Write bitmap out to file.
int BM_destroy(struct BM *map)
Destroy bitmap and free all associated memory.
struct BM * BM_create_sparse(int x, int y)
Create a sparse bitmap of dimension 'x'/'y'.
void link_set_chunk_size(int size)
struct BM * BM_file_read(FILE *fp)
Create map structure and load it from file.
struct BM * BM_create(int x, int y)
Create bitmap of dimension x/y and return structure token.
#define BM_col_to_byte(x)
char buf[GNAME_MAX+sizeof(G3D_DIRECTORY)+2]
int BM_file_write_sparse(FILE *fp, struct BM *map)
Write sparse bitmap matrix out to disk file 'fp'. NOTE: 'fp' must already be opened and later closed ...
int BM_get_map_size_sparse(struct BM *map)
Returns size of sparse bitmap in bytes.
int BM_get_sparse(struct BM *map, int x, int y)
Returns sparse bitmap value at location 'x'/'y'.
int BM_set_mode(int mode, int size)
Specify the type of data structure to use for bitmap. 'mode' can be either BM_FLAT or BM_SPARSE: ...
int BM_set(struct BM *map, int x, int y, int val)
Sets bitmap value to 'val' at location 'x' 'y'.
int BM_destroy_sparse(struct BM *map)
Destroy sparse bitmap and free all associated memory.
int BM_get_map_size(struct BM *map)
Returns size in bytes that bitmap is taking up.
int BM_set_sparse(struct BM *map, int x, int y, int val)
Set sparse bitmap value to 'val' at location 'x'/'y'.