void roadmap_square_set_screen_scale (int scale) {
if (scale < 0) {
scale = 0;
}
if (scale > roadmap_tile_get_max_scale ()) {
scale = roadmap_tile_get_max_scale ();
}
RoadMapScaleCurrent = scale;
}
static void roadmap_square_get_tiles (RoadMapArea *area, int min_scale) {
RoadMapPosition position;
RoadMapPosition corner;
RoadMapPosition origin;
int scale;
int step;
int max_scale = roadmap_tile_get_max_scale ();
corner.longitude = area->west;
corner.latitude = area->south;
if (max_scale > min_scale + 1) {
max_scale = min_scale + 1;
}
for (scale = min_scale; scale <= max_scale; scale++) {
roadmap_tile_get_origin (scale, &corner, &origin);
step = roadmap_tile_get_size (scale);
for (position.longitude = origin.longitude;
position.longitude <= area->east;
position.longitude += step) {
for (position.latitude = origin.latitude;
position.latitude <= area->north;
position.latitude += step) {
roadmap_tile_request (roadmap_tile_get_id_from_position (scale, &position), ROADMAP_TILE_STATUS_PRIORITY_NONE, 0, NULL);
}
}
}
}
int roadmap_tile_get_scale (int tile) {
int max = roadmap_tile_get_max_scale ();
int i;
for (i = 1; i <= max; i++) {
if (ScaleData[i].base_index > tile)
break;
}
return i - 1;
}
void roadmap_square_adjust_scale (int zoom_factor) {
int scale;
int max_scale;
max_scale = roadmap_tile_get_max_scale ();
for (scale = 1;
scale <= max_scale &&
roadmap_tile_get_scale_factor (scale) <= zoom_factor;
scale++)
;
roadmap_square_set_screen_scale (scale - 1);
}
int roadmap_square_get_num_scales (void) {
return roadmap_tile_get_max_scale () + 1;
}
