| |
| """Generate the deterministic RGB8 frame used for host/device parity.""" |
|
|
| from __future__ import annotations |
|
|
| import argparse |
| import hashlib |
| from pathlib import Path |
|
|
|
|
| def main() -> None: |
| parser = argparse.ArgumentParser() |
| parser.add_argument("--output", required=True, type=Path) |
| parser.add_argument("--size", type=int, default=224) |
| args = parser.parse_args() |
| if args.size <= 1 or args.size % 16: |
| raise SystemExit("--size must be greater than one and divisible by 16") |
|
|
| pixels = bytearray() |
| center = (args.size - 1) / 2.0 |
| radius_squared = (args.size * 0.28) ** 2 |
| for y in range(args.size): |
| for x in range(args.size): |
| red = round(255 * x / (args.size - 1)) |
| green = round(255 * y / (args.size - 1)) |
| checker = 48 if ((x // 16) ^ (y // 16)) & 1 else 208 |
| in_circle = (x - center) ** 2 + (y - center) ** 2 < radius_squared |
| blue = 255 - checker if in_circle else checker |
| pixels.extend((red, green, blue)) |
|
|
| args.output.parent.mkdir(parents=True, exist_ok=True) |
| args.output.write_bytes(pixels) |
| digest = hashlib.sha256(pixels).hexdigest() |
| print(f"wrote {args.output}: {len(pixels)} bytes, SHA-256 {digest}") |
|
|
|
|
| if __name__ == "__main__": |
| main() |
|
|
