| |
| """Build production PNG variants from the transparent ChatGPT Image logo master.""" |
|
|
| import argparse |
| from io import BytesIO |
| from pathlib import Path |
|
|
| from PIL import Image, ImageChops |
|
|
|
|
| ROOT = Path(__file__).resolve().parents[1] |
| MASTER = ROOT / "assets" / "awesome-loop-engineering-logo-master.png" |
| OUTPUTS = { |
| "awesome-loop-engineering-logo.png": 512, |
| "awesome-loop-engineering-logo-192.png": 192, |
| "apple-touch-icon.png": 180, |
| "favicon-32.png": 32, |
| } |
|
|
|
|
| def prepare_mark(image: Image.Image) -> Image.Image: |
| rgba = image.convert("RGBA") |
| alpha = rgba.getchannel("A") |
| bbox = alpha.point(lambda value: 255 if value > 8 else 0).getbbox() |
| if bbox is None: |
| raise ValueError(f"Logo master has no visible pixels: {MASTER}") |
|
|
| cropped = rgba.crop(bbox) |
| padding = round(max(cropped.size) * 0.09) |
| side = max(cropped.size) + 2 * padding |
| canvas = Image.new("RGBA", (side, side), (0, 0, 0, 0)) |
| offset = ((side - cropped.width) // 2, (side - cropped.height) // 2) |
| canvas.alpha_composite(cropped, offset) |
| return canvas |
|
|
|
|
| def encode_png(image: Image.Image) -> bytes: |
| buffer = BytesIO() |
| image.save(buffer, format="PNG", optimize=True) |
| return buffer.getvalue() |
|
|
|
|
| def parse_args() -> argparse.Namespace: |
| parser = argparse.ArgumentParser(description=__doc__) |
| parser.add_argument( |
| "--check", |
| action="store_true", |
| help="Fail when committed brand variants differ from the generated output.", |
| ) |
| return parser.parse_args() |
|
|
|
|
| def main() -> None: |
| args = parse_args() |
| prepared = prepare_mark(Image.open(MASTER)) |
| destinations = (ROOT / "assets", ROOT / "docs" / "assets") |
| stale: list[Path] = [] |
|
|
| for filename, size in OUTPUTS.items(): |
| output = prepared.resize((size, size), Image.Resampling.LANCZOS) |
| payload = encode_png(output) |
| for destination in destinations: |
| destination.mkdir(parents=True, exist_ok=True) |
| path = destination / filename |
| if args.check: |
| if not path.exists(): |
| stale.append(path) |
| continue |
| current = Image.open(path).convert("RGBA") |
| if current.size != output.size or ImageChops.difference(current, output).getbbox(): |
| stale.append(path) |
| continue |
| path.write_bytes(payload) |
| print(f"wrote {path.relative_to(ROOT)} ({size}x{size})") |
|
|
| if stale: |
| formatted = "\n".join(f"- {path.relative_to(ROOT)}" for path in stale) |
| raise SystemExit(f"Brand assets are stale; run scripts/build_brand_assets.py:\n{formatted}") |
|
|
| if args.check: |
| print(f"Brand assets are current ({len(OUTPUTS) * len(destinations)} files).") |
|
|
|
|
| if __name__ == "__main__": |
| main() |
|
|
