utils & resources: generate scaled resources with a script

.cirrus_requirements.txt

@@ -6,4 +6,5 @@ pytest-cov==4.0.0
 pytest==7.2.1
 httplib2==0.20.4
 requests==2.28.1
+pillow==11.3.0
 yapf==0.32.0

.gitignore

@@ -11,3 +11,6 @@ __pycache__/
 
 # Ignore optional build / cache directory
 /build
+
+# Ignore generated resources
+/resources/generated

resources/generate_resources.txt

@@ -0,0 +1,8 @@
+# input size output
+branding/app_icon/raw.png 256 generated/product_icon/256x256.png
+branding/app_icon/raw.png 128 generated/product_icon/128x128.png
+branding/app_icon/raw.png 64 generated/product_icon/64x64.png
+branding/app_icon/raw.png 48 generated/product_icon/48x48.png
+branding/app_icon/raw.png 32 generated/product_icon/32x32.png
+branding/app_icon/raw.png 24 generated/product_icon/24x24.png
+branding/app_icon/raw.png 16 generated/product_icon/16x16.png

resources/helium_resources.txt

@@ -32,31 +32,32 @@ branding/product_logo_white_200.png components/resources/default_200_percent/chr
 
 branding/product_logo_22_mono.png chrome/app/theme/chromium/product_logo_22_mono.png
 
-branding/product_icon/16x16.png chrome/app/theme/chromium/product_logo_16.png
-branding/product_icon/24x24.png chrome/app/theme/chromium/product_logo_24.png
-branding/product_icon/48x48.png chrome/app/theme/chromium/product_logo_48.png
-branding/product_icon/64x64.png chrome/app/theme/chromium/product_logo_64.png
-branding/product_icon/128x128.png chrome/app/theme/chromium/product_logo_128.png
-branding/product_icon/256x256.png chrome/app/theme/chromium/product_logo_256.png
-
-branding/product_icon/16x16.png chrome/app/theme/default_100_percent/chromium/product_logo_16.png
-branding/product_icon/32x32.png chrome/app/theme/default_100_percent/chromium/product_logo_32.png
-
-branding/product_icon/32x32.png chrome/app/theme/default_200_percent/chromium/product_logo_16.png
-branding/product_icon/64x64.png chrome/app/theme/default_200_percent/chromium/product_logo_32.png
-
-branding/product_icon/24x24.png chrome/app/theme/chromium/linux/product_logo_24.png
-branding/product_icon/48x48.png chrome/app/theme/chromium/linux/product_logo_48.png
-branding/product_icon/64x64.png chrome/app/theme/chromium/linux/product_logo_64.png
-branding/product_icon/128x128.png chrome/app/theme/chromium/linux/product_logo_128.png
-branding/product_icon/256x256.png chrome/app/theme/chromium/linux/product_logo_256.png
-
-branding/product_icon/16x16.png chrome/app/theme/default_100_percent/chromium/linux/product_logo_16.png
-branding/product_icon/32x32.png chrome/app/theme/default_100_percent/chromium/linux/product_logo_32.png
-
 branding/product_logo.svg chrome/app/theme/chromium/product_logo.svg
 
 branding/product_logo.icon chrome/app/vector_icons/browser_logo.icon
 branding/product_logo.icon components/omnibox/browser/vector_icons/product_chrome_refresh.icon
 branding/product_logo.icon components/vector_icons/chromium/product.icon
 branding/product_logo_color.icon components/vector_icons/chromium/product_refresh.icon
+
+# generated resources
+generated/product_icon/16x16.png chrome/app/theme/chromium/product_logo_16.png
+generated/product_icon/24x24.png chrome/app/theme/chromium/product_logo_24.png
+generated/product_icon/48x48.png chrome/app/theme/chromium/product_logo_48.png
+generated/product_icon/64x64.png chrome/app/theme/chromium/product_logo_64.png
+generated/product_icon/128x128.png chrome/app/theme/chromium/product_logo_128.png
+generated/product_icon/256x256.png chrome/app/theme/chromium/product_logo_256.png
+
+generated/product_icon/16x16.png chrome/app/theme/default_100_percent/chromium/product_logo_16.png
+generated/product_icon/32x32.png chrome/app/theme/default_100_percent/chromium/product_logo_32.png
+
+generated/product_icon/32x32.png chrome/app/theme/default_200_percent/chromium/product_logo_16.png
+generated/product_icon/64x64.png chrome/app/theme/default_200_percent/chromium/product_logo_32.png
+
+generated/product_icon/24x24.png chrome/app/theme/chromium/linux/product_logo_24.png
+generated/product_icon/48x48.png chrome/app/theme/chromium/linux/product_logo_48.png
+generated/product_icon/64x64.png chrome/app/theme/chromium/linux/product_logo_64.png
+generated/product_icon/128x128.png chrome/app/theme/chromium/linux/product_logo_128.png
+generated/product_icon/256x256.png chrome/app/theme/chromium/linux/product_logo_256.png
+
+generated/product_icon/16x16.png chrome/app/theme/default_100_percent/chromium/linux/product_logo_16.png
+generated/product_icon/32x32.png chrome/app/theme/default_100_percent/chromium/linux/product_logo_32.png

utils/generate_resources.py

@@ -0,0 +1,67 @@
+# Copyright 2025 The Helium Authors
+# You can use, redistribute, and/or modify this source code under
+# the terms of the GPL-3.0 license that can be found in the LICENSE file.
+"""
+Generates scaled resources for Helium branding
+"""
+
+import os
+import sys
+from PIL import Image
+
+
+def scale_image(input_file, size, output_path):
+    """
+    Scales the square image to provided size and saves it
+    """
+    img = Image.open(input_file)
+    img.thumbnail((size, size))
+
+    # make sure output path exists
+    os.makedirs(os.path.dirname(output_path), exist_ok=True)
+
+    img.save(output_path, optimize=True)
+
+
+def generate_resources(resource_list, resource_dir):
+    """
+    Parses the resource list and generates resources
+    for each valid line
+    """
+    with open(resource_list, 'r', encoding='utf-8') as file:
+        for line_number, line in enumerate(file, start=1):
+            line = line.strip()
+            if not line or line.startswith('#'):
+                continue
+
+            line_parts = line.split()
+
+            if len(line_parts) != 3:
+                print(f"Line {line_number} is invalid. Skipping.")
+                continue
+
+            input_file = os.path.join(resource_dir, line_parts[0])
+            size = int(line_parts[1])
+            output_file = os.path.join(resource_dir, line_parts[2])
+
+            scale_image(input_file, size, output_file)
+            print(f"Created {line_parts[2]}")
+
+
+def main():
+    """CLI entrypoint"""
+    if len(sys.argv) != 3:
+        print(
+            "Usage: python3 generate_resources.py " \
+            "<generate_resources.txt> <resources_dir>"
+        )
+        sys.exit(1)
+
+    resource_list = sys.argv[1]
+    resource_dir = sys.argv[2]
+
+    generate_resources(resource_list, resource_dir)
+
+
+if __name__ == "__main__":
+    main()