add script for conversion to webp

Author: AGulev

convert_to_webp.py

@@ -0,0 +1,42 @@
+from pathlib import Path
+from PIL import Image
+import os.path
+from termcolor import colored
+
+total_saved_size = 0
+
+def sizeof_fmt(num, suffix="B"):
+    for unit in ["", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi"]:
+        if abs(num) < 1024.0:
+            return f"{num:3.1f}{unit}{suffix}"
+        num /= 1024.0
+    return f"{num:.1f}Yi{suffix}"
+
+def convert_to_webp_if_need(source):
+    global total_saved_size
+    destination = source.with_suffix(".webp")
+
+    if not os.path.isfile(destination):
+        image = Image.open(source)
+        size_before = os.path.getsize(source)
+        image.save(destination, format="webp", method=6, lossless=True)
+        size_after = os.path.getsize(destination)
+        diff = size_before - size_after
+        color = "green" if diff > 0 else "red"
+        print("Convert to WEBP: " + str(destination) + " " + colored(sizeof_fmt(diff), color))
+        total_saved_size = total_saved_size + diff
+    return destination
+
+
+def main():
+    global total_saved_size
+    paths = Path(".").glob("**/*.png")
+    for path in paths:
+        convert_to_webp_if_need(path)
+    # paths = Path(".").glob("**/*.jpg")
+    # for path in paths:
+    #     convert_to_webp_if_need(path)
+    color = "green" if total_saved_size > 0 else "red"
+    print(colored("Total saved size is "+sizeof_fmt(total_saved_size), color))
+
+main()