extract-unity-sprites.py

#!/usr/bin/env python3

# usage: extract-unity-sprites.py /path/to/spritesheet.png.meta

import yaml
import sys
from PIL import Image

def run_extract(meta):
    with open(meta, 'r') as f:
        map = yaml.safe_load(f)
    im = Image.open(meta.removesuffix(".meta"))
    print(im)
    for obj in map["TextureImporter"]["spriteSheet"]["sprites"]:
        rc = obj["rect"]
        rgn = (rc["x"], rc["y"],
            rc["x"] + rc["width"],
            rc["y"] + rc["height"])
        print(rgn)
        sprite = im.crop(rgn)
        sprite.save(obj["name"] + ".png")

if __name__ == '__main__':
    run_extract(sys.argv[1])