rpgmaker autotiles to Tiled

autotile-rpgm-to-tiled.py

#!/usr/bin/env python3

# 
# Script to convert autotile from rpgmaker form to Tiled.
# Based on post: https://forums.rpgmakerweb.com/index.php?threads/auto-tiles-in-tiled-parallax-mapping-made-easier.97739/
#

from PIL import Image
import sys

TILE_SIZE=16
REGION_WIDTH = TILE_SIZE * 4
REGION_HEIGHT = TILE_SIZE * 6

if len(sys.argv) < 3:
    print("You must provide source and destination file name!")
    print("Usage: %s input_file output_file" % sys.argv[0])
    exit(1)

def convert(source):
    num_x = source.width / REGION_WIDTH
    num_y = source.height / REGION_HEIGHT

    if num_x % 1 != 0 or num_y %1 !=0:
        print("Error, cannot divide in regions!")
        exit(1)

    dst = Image.new('RGBA', (int(num_x * TILE_SIZE * 8), int(num_y * TILE_SIZE * 4)))
    row = 0

    while row < num_y:
        print("Processing row: %i" % row)
        column = 0

        while column < num_x:
            print("Processing column: %i" % column)

            offset_x = column * REGION_WIDTH
            offset_y = row * REGION_HEIGHT

            region_large     = source.crop((0+offset_x,               2*TILE_SIZE+offset_y,    4*TILE_SIZE+offset_x, 6*TILE_SIZE+offset_y))
            region_green     = source.crop((2*TILE_SIZE+offset_x,     0+offset_y,              3*TILE_SIZE+offset_x, 1*TILE_SIZE+offset_y))
            region_yellow    = source.crop((3*TILE_SIZE+offset_x,     0+offset_y,              4*TILE_SIZE+offset_x, 1*TILE_SIZE+offset_y))
            region_purple    = source.crop((2*TILE_SIZE+offset_x,     1*TILE_SIZE+offset_y,    3*TILE_SIZE+offset_x, 2*TILE_SIZE+offset_y))
            region_pink      = source.crop((3*TILE_SIZE+offset_x,     1*TILE_SIZE+offset_y,    4*TILE_SIZE+offset_x, 2*TILE_SIZE+offset_y))
            region_brown     = source.crop((1*TILE_SIZE+offset_x,     2*TILE_SIZE+offset_y,    3*TILE_SIZE+offset_x, 3*TILE_SIZE+offset_y))
            region_orange    = source.crop((0+offset_x,               3*TILE_SIZE+offset_y,    1*TILE_SIZE+offset_x, 5*TILE_SIZE+offset_y))
            region_teal      = source.crop((3*TILE_SIZE+offset_x,     3*TILE_SIZE+offset_y,    4*TILE_SIZE+offset_x, 5*TILE_SIZE+offset_y))
            region_drk_green = source.crop((1*TILE_SIZE+offset_x,     5*TILE_SIZE+offset_y,    3*TILE_SIZE+offset_x, 6*TILE_SIZE+offset_y))

            offset_x = column*TILE_SIZE*8
            offset_y = row*TILE_SIZE*4

            dst.paste(region_large,     (4*TILE_SIZE+offset_x,  0+offset_y))
            dst.paste(region_green,     (3*TILE_SIZE+offset_x,  3*TILE_SIZE+offset_y))
            dst.paste(region_yellow,    (0+offset_x,            3*TILE_SIZE+offset_y))
            dst.paste(region_purple,    (3*TILE_SIZE+offset_x,  0+offset_y))
            dst.paste(region_pink,      (0+offset_x,            0+offset_y))
            dst.paste(region_brown,     (1*TILE_SIZE+offset_x,  3*TILE_SIZE+offset_y))
            dst.paste(region_orange,    (3*TILE_SIZE+offset_x,  1*TILE_SIZE+offset_y))
            dst.paste(region_teal,      (0+offset_x,            1*TILE_SIZE+offset_y))
            dst.paste(region_drk_green, (1*TILE_SIZE+offset_x,  0+offset_y))

            column += 1

        row += 1

    return dst

try:
    source = Image.open(sys.argv[1])
    dst = convert(source)
    dst.save(sys.argv[2])
except IOError:
    print("File not accessible")
    exit(1)
finally:
    source.close()