[Feature Request] Add "Export Tilemap" Function

[dannye]

It would be handy to quickly be able to export a blk file as a tilemap.

Obviously it's not algorithmically challenging, but here's a python script to demonstrate what I mean:

blktotilemap.py

#!/usr/bin/env python

import argparse

if __name__ == "__main__":
	ap = argparse.ArgumentParser(description="Convert blk files to tilemaps")
	ap.add_argument("-b", "--bst", default="gfx/blocksets/overworld.bst", help="blockset to use")
	ap.add_argument("-w", "--width", required=True, help="width of blk file")
	ap.add_argument("blk", help="blk file to convert")
	args = ap.parse_args()

	bst_file = bytearray(open(args.bst, "rb").read())
	num_bst_blocks = len(bst_file) // 16

	blk_file = bytearray(open(args.blk, "rb").read())
	num_blk_blocks = len(blk_file)

	tilemap = bytearray([0 for x in range(num_blk_blocks * 16)])

	width = int(args.width)
	height = num_blk_blocks // width
	for block_y in range(height):
		for block_x in range(width):
			block_index = block_y * width + block_x
			block_id = blk_file[block_index]
			assert block_id < num_bst_blocks
			block_tiles = bst_file[block_id * 16:(block_id + 1) * 16]
			base_y = block_y * 4
			base_x = block_x * 4
			for tile_y in range(4):
				for tile_x in range(4):
					tile_index = (base_y + tile_y) * (width * 4) + (base_x + tile_x)
					tilemap[tile_index] = block_tiles[tile_y * 4 + tile_x]
	out_file = open(args.blk + ".tilemap", "wb")
	out_file.write(tilemap)
	out_file.close()

For example, it turns this blk file:

Into this tilemap: