""" Outputs one huge PNG file using the tiles from an Overviewer map. """ import sys from glob import glob from optparse import OptionParser from os.path import exists, join, split from PIL import Image def main(): usage = 'usage: %prog [options] ' parser = OptionParser(description='', prog='png_it', version='0.0.1', usage=usage) parser.add_option('--memory-limit', '-m', help="Limit the amount of ram to use in MB. " "If it's expected to exceed the limit it won't do anything.", metavar='', type=int, dest='memory_limit', default=None) parser.add_option('--zoom-level', '-z', help="Which zoom level to use from the overviewer " "map. NOTE: the RAM usage will increase exponentially with the zoom level.", metavar='', type=int, dest='zoom_level', default=None) parser.add_option('--crop', '-c', help="Crop a frame around the image, as a percentage of the " "original. For example in a image of 1000x2000 pixels, a 10% crop will crop " "100 pixels in the left and right sides and 200 pixels in the bottom and " "top sides. NOTE: this is no exact, it will be rounded to the nearest " "Overviewer map tile.", metavar='', type=int, dest='crop', default=0) parser.add_option('--center', '-e', help="Mark what will be the center of the image, two " "comma separated percentage values.", metavar='
', type=str, dest='center', default=None) parser.add_option('--autocrop', '-a', help="Calculate the center and crop vales automatically " "to show all the tiles in the smallest possible image size. Unless you want " "a very specific image this option is recommended.", action='store_true', dest='autocrop', default=False) parser.add_option('--output', '-o', help="Path for the resulting PNG. The image will be saved " "as a PNG file, no matter what extension you use.", metavar='', type=str, dest='output', default="output.png") (options, args) = parser.parse_args() # arg is overviewer tile set folder if len(args) > 1: parser.error("Error! Only one Overviewer tile set accepted as input. Use --help for a " "complete list of options.") if not args: parser.error("Error! Need an overviewer tile set folder. Use --help for a complete list " "of options.") # set the tileset dir after ensuring it's been provided, not before. tileset = args[0] if not options.zoom_level: parser.error("Error! The option zoom-level is mandatory.") if options.autocrop and (options.center or options.crop): parser.error("Error! You can't mix --autocrop with --center or --crop.") # check for the output folder, filename = split(options.output) if folder != '' and not exists(folder): parser.error("The destination folder \'{0}\' doesn't exist.".format(folder)) # calculate stuff n = options.zoom_level length_in_tiles = 2**n tile_size = (384, 384) px_size = 4 # bytes # create a list with all the images in the zoom level path = tileset for i in range(options.zoom_level): path = join(path, "?") path += ".png" all_images = glob(path) if not all_images: print("Error! No images found in this zoom level. Is this really an Overviewer tile set " "directory?") sys.exit(1) # autocrop will calculate the center and crop values automagically if options.autocrop: min_x = min_y = length_in_tiles max_x = max_y = 0 counter = 0 total = len(all_images) print("Checking tiles for autocrop calculations:") # get the maximum and minimum tiles coordinates of the map for path in all_images: t = get_tuple_coords(options, path) c = get_tile_coords_from_tuple(options, t) min_x = min(min_x, c[0]) min_y = min(min_y, c[1]) max_x = max(max_x, c[0]) max_y = max(max_y, c[1]) counter += 1 if (counter % 100 == 0 or counter == total or counter == 1): print("Checked {0} of {1}.".format(counter, total)) # the center of the map will be in the middle of the occupied zone center = (int((min_x + max_x) / 2.0), int((min_y + max_y) / 2.0)) # see the next next comment to know what center_vector is center_vector = (int(center[0] - (length_in_tiles / 2.0 - 1)), int(center[1] - (length_in_tiles / 2.0 - 1))) # I'm not completely sure why, but the - 1 factor in ^ makes everything nicer. # min_x - center_vector[0] will be the unused amount of tiles in # the left and the right of the map (and this is true because we # are in the actual center of the map) crop = (min_x - center_vector[0], min_y - center_vector[1]) else: # center_vector is the vector that joins the center tile with # the new center tile in tile coords # tile coords are how many tile are on the left, x, and # how many above, y. The top-left tile has coords (0,0) if options.center: center_x, center_y = options.center.split(",") center_x = int(center_x) center_y = int(center_y) center_tile_x = int(2**n * (center_x / 100.0)) center_tile_y = int(2**n * (center_y / 100.0)) center_vector = (int(center_tile_x - length_in_tiles / 2.0), int(center_tile_y - length_in_tiles / 2.0)) else: center_vector = (0, 0) # crop if needed tiles_to_crop = int(2**n * (options.crop / 100.0)) crop = (tiles_to_crop, tiles_to_crop) final_img_size = (tile_size[0] * length_in_tiles, tile_size[1] * length_in_tiles) final_cropped_img_size = (final_img_size[0] - 2 * crop[0] * tile_size[0], final_img_size[1] - 2 * crop[1] * tile_size[1]) mem = final_cropped_img_size[0] * final_cropped_img_size[1] * px_size # bytes! print("The image size will be {0}x{1}" .format(final_cropped_img_size[0], final_cropped_img_size[1])) print("A total of {0} MB of memory will be used.".format(mem / 1024**2)) if mem / 1024.0**2.0 > options.memory_limit: print("Warning! The expected RAM usage exceeds the specified limit. Exiting.") sys.exit(1) # Create a new huge image final_img = Image.new("RGBA", final_cropped_img_size, (26, 26, 26, 0)) # Paste ALL the images total = len(all_images) counter = 0 print("Pasting images:") for path in all_images: img = Image.open(path) t = get_tuple_coords(options, path) x, y = get_cropped_centered_img_coords(options, tile_size, center_vector, crop, t) final_img.paste(img, (x, y)) counter += 1 if (counter % 100 == 0 or counter == total or counter == 1): print("Pasted {0} of {1}.".format(counter, total)) print("Done!") print("Saving image... (this may take a while)") final_img.save(options.output, "PNG") def get_cropped_centered_img_coords(options, tile_size, center_vector, crop, t): """ Returns the new image coords used to paste tiles in the big image. Takes options, the size of tiles, center vector, crop value (see calculate stuff) and a tuple from get_tuple_coords. """ x, y = get_tile_coords_from_tuple(options, t) new_tile_x = x - crop[0] - center_vector[0] new_tile_y = y - crop[1] - center_vector[1] new_img_x = new_tile_x * tile_size[0] new_img_y = new_tile_y * tile_size[1] return new_img_x, new_img_y def get_tile_coords_from_tuple(options, t): """ Gets a tuple of coords from get_tuple_coords and returns the number of tiles from the top left corner to this tile. The top-left tile has coordinates (0,0) """ x = 0 y = 0 z = options.zoom_level n = 1 for i in t: if i == 1: x += 2**(z - n) elif i == 2: y += 2**(z - n) elif i == 3: x += 2**(z - n) y += 2**(z - n) n += 1 return (x, y) def get_tuple_coords(options, path): """ Extracts the "quadtree coordinates" (the numbers in the folder of the tile sets) from an image path. Returns a tuple with them. The upper most folder is in the left of the tuple.""" l = [] path, head = split(path) head = head.split(".")[0] # remove the .png l.append(int(head)) for i in range(options.zoom_level - 1): path, head = split(path) l.append(int(head)) # the list is reversed l.reverse() return tuple(l) def get_image(tileset, t): """ Returns the path of an image, takes a tuple with the "quadtree coordinates", these are the numbers in the folders of the tile set. """ path = tileset for d in t: path = join(path, str(d)) path += ".png" return path if __name__ == '__main__': main()