Initial public release tree

scripts/heic_thumbnailer.py

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+"""HEIC/HEIF thumbnailer for the freedesktop (GNOME/GTK) thumbnail system.
+
+Decodes a HEIC/HEIF file's SDR base image with pillow-heif (which bundles a
+modern libheif) and writes a PNG thumbnail.  Used on Linux systems whose
+*system* libheif is too old to thumbnail iPhone HDR HEICs; installed under
+/usr/local by scripts/install_heic_thumbnailer.sh so it is reachable inside
+GNOME's bwrap thumbnailer sandbox (which binds /usr but not $HOME).
+
+Invoked by the thumbnail system as:  ... -s SIZE INPUT OUTPUT
+"""
+import sys
+
+
+def main(argv):
+    args = argv[1:]
+    size, rest = 256, []
+    i = 0
+    while i < len(args):
+        if args[i] == "-s":
+            size = int(args[i + 1]); i += 2
+        else:
+            rest.append(args[i]); i += 1
+    if len(rest) < 2:
+        sys.stderr.write("usage: heic_thumbnailer.py -s SIZE INPUT OUTPUT\n")
+        return 2
+    inp, outp = rest[0], rest[1]
+
+    import pillow_heif
+    pillow_heif.register_heif_opener()
+    from PIL import Image
+
+    im = Image.open(inp)
+    im.load()
+    im = im.convert("RGB")
+    im.thumbnail((size, size), Image.LANCZOS)
+    im.save(outp, "PNG")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv))