| """Downscale packaged textures in place (helper for package_task9_background.py). |
| |
| Usage: python3 _downscale_textures.py <package_dir> <shell_max_px> <prop_max_px> |
| |
| Reads resource/textures_manifest.tsv (rel_path<TAB>shell|prop) and caps the |
| longest image side per class. Only common raster formats PIL handles are |
| touched (.png/.jpg/.jpeg/.tga); .hdr/.exr/.mdl and anything PIL cannot |
| process are kept as-is. Never upscales. |
| """ |
|
|
| import sys |
| from pathlib import Path |
|
|
| from PIL import Image |
|
|
| Image.MAX_IMAGE_PIXELS = None |
|
|
| package_dir = Path(sys.argv[1]) |
| max_px = {"shell": int(sys.argv[2]), "prop": int(sys.argv[3])} |
| manifest = package_dir / "resource" / "textures_manifest.tsv" |
|
|
| RASTER_EXTS = {".png", ".jpg", ".jpeg", ".tga"} |
|
|
| before_total = after_total = 0 |
| resized = skipped = failed = 0 |
| for line in manifest.read_text().splitlines(): |
| rel, cls = line.split("\t") |
| path = package_dir / rel |
| if not path.exists() or path.suffix.lower() not in RASTER_EXTS: |
| skipped += 1 |
| continue |
| size_before = path.stat().st_size |
| before_total += size_before |
| try: |
| with Image.open(path) as im: |
| longest = max(im.size) |
| cap = max_px[cls] |
| if longest <= cap: |
| after_total += size_before |
| skipped += 1 |
| continue |
| scale = cap / longest |
| new_size = (max(1, round(im.width * scale)), max(1, round(im.height * scale))) |
| im = im.resize(new_size, Image.LANCZOS) |
| im.save(path) |
| after_total += path.stat().st_size |
| resized += 1 |
| except Exception as exc: |
| print(f" keep as-is (PIL failed): {rel}: {exc}") |
| after_total += size_before |
| failed += 1 |
|
|
| print(f" resized {resized}, unchanged {skipped}, failed {failed}; " |
| f"textures {before_total / 1e6:.1f} MB -> {after_total / 1e6:.1f} MB") |
|
|
