Review changes batch 6 of 6

design-pipeline/scripts/build_module_page_backgrounds.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+import hashlib
+import json
+from pathlib import Path
+
+from PIL import Image
+
+
+ROOT = Path(__file__).resolve().parents[2]
+MANIFEST = ROOT / "design-pipeline/manifests/module-page-backgrounds.json"
+
+
+def sha256(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as stream:
+        for chunk in iter(lambda: stream.read(1024 * 1024), b""):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def normalize(source: Path, output: Path, width: int, height: int) -> None:
+    with Image.open(source) as image:
+        image = image.convert("RGB")
+        scale = max(width / image.width, height / image.height)
+        resized = image.resize(
+            (round(image.width * scale), round(image.height * scale)),
+            Image.Resampling.LANCZOS,
+        )
+        left = max(0, (resized.width - width) // 2)
+        top = max(0, (resized.height - height) // 2)
+        normalized = resized.crop((left, top, left + width, top + height))
+        output.parent.mkdir(parents=True, exist_ok=True)
+        normalized.save(output, format="PNG", optimize=True)
+
+
+def main() -> None:
+    manifest = json.loads(MANIFEST.read_text(encoding="utf-8"))
+    width = int(manifest["width"])
+    height = int(manifest["height"])
+    report = []
+    for item in manifest["backgrounds"]:
+        source = ROOT / item["source"]
+        output = ROOT / item["output"]
+        if not source.is_file():
+            raise FileNotFoundError(source)
+        normalize(source, output, width, height)
+        report.append(
+            {
+                "module": item["module"],
+                "source": item["source"],
+                "output": item["output"],
+                "size": [width, height],
+                "sha256": sha256(output),
+            }
+        )
+    print(json.dumps(report, ensure_ascii=False, indent=2))
+
+
+if __name__ == "__main__":
+    main()