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lockstep-player/scripts/generate_launcher_icons.py

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Python
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2026-05-31 13:01:13 +02:00
"""Downscale launcher icon PNGs from mipmap-xxxhdpi masters to lower densities."""
from __future__ import annotations
from pathlib import Path
from PIL import Image
ROOT = Path(__file__).resolve().parents[1]
RES = ROOT / "app" / "src" / "main" / "res"
SOURCE_FOLDER = "mipmap-xxxhdpi"
SOURCES = {
"ic_launcher.png": {
"mipmap-xxxhdpi": 192,
"mipmap-xxhdpi": 144,
"mipmap-xhdpi": 96,
"mipmap-hdpi": 72,
"mipmap-mdpi": 48,
},
"ic_launcher_foreground.png": {
"mipmap-xxxhdpi": 432,
"mipmap-xxhdpi": 324,
"mipmap-xhdpi": 216,
"mipmap-hdpi": 162,
"mipmap-mdpi": 108,
},
}
def main() -> None:
for filename, sizes in SOURCES.items():
source_path = RES / SOURCE_FOLDER / filename
source = Image.open(source_path)
expected = sizes[SOURCE_FOLDER]
if source.size != (expected, expected):
raise RuntimeError(
f"{source_path} is {source.size[0]}x{source.size[1]}, expected {expected}x{expected}"
)
for folder, size in sizes.items():
if folder == SOURCE_FOLDER:
continue
out_dir = RES / folder
out_dir.mkdir(parents=True, exist_ok=True)
resized = source.resize((size, size), Image.Resampling.LANCZOS)
resized.save(out_dir / filename)
print(f"Wrote {folder}/{filename} ({size}x{size})")
print("Done.")
if __name__ == "__main__":
main()