Datasets:
File size: 1,911 Bytes
33201c9 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | """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 # dataset ships some very large textures
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")
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