// check and see if the image is cached
// if so, change it's status to TILE_UNINITIALIZED (to handle downloading tiles) and return 1
int imagery_cached( image_tile_t * image_tile)
{
char filename[MAX_FILENAME_LENGTH];
filename_of_ix_iy_zoom(filename, image_tile->ix, image_tile->iy, image_tile->zoom_level);
FILE * imagefile;
if ((imagefile = fopen(filename,"r")) == NULL){
return 0;
}
fclose(imagefile);
return 1;
}
void
start_tile_download( image_tile_t * image_tile)
{
image_tile->status = TILE_DOWNLOADING;
double lat,lon;
lat_lon_centered_from_ix_iy_zoom( &lat, &lon, image_tile->ix, image_tile->iy, image_tile->zoom_level);
char filename[MAX_FILENAME_LENGTH];
filename_of_ix_iy_zoom( filename, image_tile->ix, image_tile->iy, image_tile->zoom_level );
printf("downloading %s\n", filename);
char system_call[1024];
sprintf(system_call, "sh shake_n_bake.sh 'http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=256x256&maptype=satellite&format=png32&sensor=false' %s &", lat, lon, zoom_level, filename);
system(system_call);
}
void
load_tile_from_cache( image_tile_t * image_tile)
{
char filename[MAX_FILENAME_LENGTH];
filename_of_ix_iy_zoom(filename, image_tile->ix, image_tile->iy, image_tile->zoom_level);
FILE * imagefile;
if ((imagefile = fopen(filename,"r")) == NULL){
printf("this file was supposed to be available but it's not\n");
fclose(imagefile);
exit(1);
}
fclose(imagefile);
if ( ( image_tile->image = imlib_load_image(filename) ) != 0){
image_tile->status = TILE_READY;
setup_texture( image_tile );
} else {
printf("imlib_load_image fail\n");
exit(1);
}
}