rebaseline_server: add pixel diffs, and sorting by diff metrics

gm/rebaseline_server/server.py

 #!/usr/bin/python
 
 """
 Copyright 2013 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 
 HTTP server for our HTML rebaseline viewer.
 """
@@ skipping 27 matching lines @@
 import svn
 
 # Imports from local dir
 import results
 
 ACTUALS_SVN_REPO = 'http://skia-autogen.googlecode.com/svn/gm-actual'
 EXPECTATIONS_SVN_REPO = 'http://skia.googlecode.com/svn/trunk/expectations/gm'
 PATHSPLIT_RE = re.compile('/([^/]+)/(.+)')
 TRUNK_DIRECTORY = os.path.dirname(os.path.dirname(os.path.dirname(
     os.path.realpath(__file__))))
+GENERATED_IMAGES_ROOT = os.path.join(PARENT_DIRECTORY, 'static',
+                                     'generated-images')
 
 # A simple dictionary of file name extensions to MIME types. The empty string
 # entry is used as the default when no extension was given or if the extension
 # has no entry in this dictionary.
 MIME_TYPE_MAP = {'': 'application/octet-stream',
                  'html': 'text/html',
                  'css': 'text/css',
                  'png': 'image/png',
                  'js': 'application/javascript',
                  'json': 'application/json'
@@ skipping 90 matching lines @@
             'Updating expected GM results in %s from SVN repo %s ...' % (
             self._expectations_dir, EXPECTATIONS_SVN_REPO))
         expectations_repo = svn.Svn(self._expectations_dir)
         if not os.path.isdir(self._expectations_dir):
           os.makedirs(self._expectations_dir)
           expectations_repo.Checkout(EXPECTATIONS_SVN_REPO, '.')
         else:
           expectations_repo.Update('.')
 
       logging.info(
-          'Parsing results from actuals in %s and expectations in %s ...' % (
+          ('Parsing results from actuals in %s and expectations in %s, '
+          + 'and generating pixel diffs (may take a while) ...') % (
           self._actuals_dir, self._expectations_dir))
       self.results = results.Results(
         actuals_root=self._actuals_dir,
-        expected_root=self._expectations_dir)
+        expected_root=self._expectations_dir,
+        generated_images_root=GENERATED_IMAGES_ROOT)
 
   def _result_reloader(self):
     """ If --reload argument was specified, reload results at the appropriate
     interval.
     """
     while self._reload_seconds:
       time.sleep(self._reload_seconds)
       self.update_results()
 
   def run(self):
@@ skipping 265 matching lines @@
   args = parser.parse_args()
   global _SERVER
   _SERVER = Server(actuals_dir=args.actuals_dir,
                    expectations_dir=args.expectations_dir,
                    port=args.port, export=args.export, editable=args.editable,
                    reload_seconds=args.reload)
   _SERVER.run()
 
 if __name__ == '__main__':
   main()