"""Compile the generated four-tile upper-lounge material atlas."""
from pathlib import Path
import struct
from PIL import Image

ROOT = Path(__file__).resolve().parents[2]
sheet = Image.open(ROOT / "assets/sprites/hall/upper-materials-v1.png").convert("RGBA")
frames = [sheet.crop((x*sheet.width//2,y*sheet.height//2,
                      (x+1)*sheet.width//2,(y+1)*sheet.height//2)).resize((256,256),Image.Resampling.LANCZOS)
          for y in range(2) for x in range(2)]
raw = b"".join(frame.tobytes("raw","BGRA") for frame in frames)
(ROOT / "assets/animations/hall/upper-materials-v1.bin").write_bytes(
    struct.pack("<4s4I",b"ANM1",256,256,4,len(raw))+raw)
print("Packed steel, marble, carpet and coffer materials")