1 files changed, 67 insertions, 0 deletions
diff --git a/chromium/tools/resources/optimize-ico-files.py b/chromium/tools/resources/optimize-ico-files.py
new file mode 100755
index 00000000000..2635e9c509b
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+++ b/chromium/tools/resources/optimize-ico-files.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Windows ICO file crusher.
+
+Optimizes the PNG images within a Windows ICO icon file. This extracts all of
+the sub-images within the file, runs any PNG-formatted images through
+optimize-png-files.sh, then packs them back into an ICO file.
+
+NOTE: ICO files can contain both raw uncompressed BMP files and PNG files. This
+script does not touch the BMP files, which means if you have a huge uncompressed
+image, it will not get smaller. 256x256 icons should be PNG-formatted first.
+(Smaller icons should be BMPs for compatibility with Windows XP.)
+"""
+
+import argparse
+import logging
+import os
+import StringIO
+import sys
+
+import ico_tools
+
+def main(args=None):
+  if args is None:
+    args = sys.argv[1:]
+
+  parser = argparse.ArgumentParser(description='Crush Windows ICO files.')
+  parser.add_argument('files', metavar='ICO', type=argparse.FileType('r+b'),
+                      nargs='+', help='.ico files to be crushed')
+  parser.add_argument('-o', dest='optimization_level', metavar='OPT', type=int,
+                      help='optimization level')
+  parser.add_argument('-d', '--debug', dest='debug', action='store_true',
+                      help='enable debug logging')
+
+  args = parser.parse_args()
+
+  if args.debug:
+    logging.getLogger().setLevel(logging.DEBUG)
+
+  for file in args.files:
+    buf = StringIO.StringIO()
+    file.seek(0, os.SEEK_END)
+    old_length = file.tell()
+    file.seek(0, os.SEEK_SET)
+    ico_tools.OptimizeIcoFile(file, buf, args.optimization_level)
+
+    new_length = len(buf.getvalue())
+
+    # Always write (even if file size not reduced), because we make other fixes
+    # such as regenerating the AND mask.
+    file.truncate(new_length)
+    file.seek(0)
+    file.write(buf.getvalue())
+
+    if new_length >= old_length:
+      logging.info('%s : Could not reduce file size.', file.name)
+    else:
+      saving = old_length - new_length
+      saving_percent = float(saving) / old_length
+      logging.info('%s : %d => %d (%d bytes : %d %%)', file.name, old_length,
+                   new_length, saving, int(saving_percent * 100))
+
+if __name__ == '__main__':
+  sys.exit(main())