Add tools to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 178 insertions, 0 deletions

diff --git a/tools/site_compare/operators/__init__.py b/tools/site_compare/operators/__init__.py
new file mode 100644
index 0000000..02eac07
--- /dev/null
+++ b/tools/site_compare/operators/__init__.py
@@ -0,0 +1,26 @@
+#!/usr/bin/python2.4
+#
+# Copyright 2007 Google Inc. All Rights Reserved.
+
+"""Selects the appropriate operator."""
+
+__author__ = 'jhaas@google.com (Jonathan Haas)'
+
+
+def GetOperator(operator):
+  """Given an operator by name, returns its module.
+  
+  Args:
+    operator: string describing the comparison
+    
+  Returns:
+    module
+  """
+ 
+  # TODO(jhaas): come up with a happy way of integrating multiple operators
+  # with different, possibly divergent and possibly convergent, operators.
+ 
+  module = __import__(operator, globals(), locals(), [''])
+  
+  return module
+
diff --git a/tools/site_compare/operators/equals.py b/tools/site_compare/operators/equals.py
new file mode 100644
index 0000000..2771401
--- /dev/null
+++ b/tools/site_compare/operators/equals.py
@@ -0,0 +1,66 @@
+#!/usr/bin/python2.4
+# Copyright 2008, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#    * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#    * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Compare two images for equality."""
+
+from PIL import Image
+from PIL import ImageChops
+
+
+def Compare(file1, file2, **kwargs):
+  """Compares two images to see if they're identical.
+  
+  Args:
+    file1: path to first image to compare
+    file2: path to second image to compare
+    kwargs: unused for this operator
+    
+  Returns:
+    None if the images are identical
+    A tuple of (errorstring, image) if they're not
+  """
+  kwargs = kwargs  # unused parameter
+  
+  im1 = Image.open(file1)
+  im2 = Image.open(file2)
+  
+  if im1.size != im2.size:
+    return ("The images are of different size (%s vs %s)" %
+            (im1.size, im2.size), im1)
+
+  diff = ImageChops.difference(im1, im2)
+  
+  if max(diff.getextrema()) != (0, 0):
+    return ("The images differ", diff)
+  else:
+    return None
+  
+  
+  
\ No newline at end of file
diff --git a/tools/site_compare/operators/equals_with_mask.py b/tools/site_compare/operators/equals_with_mask.py
new file mode 100644
index 0000000..574457a
--- /dev/null
+++ b/tools/site_compare/operators/equals_with_mask.py
@@ -0,0 +1,86 @@
+#!/usr/bin/python2.4
+# Copyright 2008, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#    * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#    * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Compare two images for equality, subject to a mask."""
+
+from PIL import Image
+from PIL import ImageChops
+
+import os.path
+
+
+def Compare(file1, file2, **kwargs):
+  """Compares two images to see if they're identical subject to a mask.
+  
+  An optional directory containing masks is supplied. If a mask exists
+  which matches file1's name, areas under the mask where it's black
+  are ignored.
+  
+  Args:
+    file1: path to first image to compare
+    file2: path to second image to compare
+    kwargs: ["maskdir"] contains the directory holding the masks
+    
+  Returns:
+    None if the images are identical
+    A tuple of (errorstring, image) if they're not
+  """
+  
+  maskdir = None
+  if "maskdir" in kwargs:
+    maskdir = kwargs["maskdir"]
+  
+  im1 = Image.open(file1)
+  im2 = Image.open(file2)
+  
+  if im1.size != im2.size:
+    return ("The images are of different size (%r vs %r)" %
+            (im1.size, im2.size), im1)
+
+  diff = ImageChops.difference(im1, im2)
+  
+  if maskdir:
+    maskfile = os.path.join(maskdir, os.path.basename(file1))
+    if os.path.exists(maskfile):
+      mask = Image.open(maskfile)
+      
+      if mask.size != im1.size:
+        return ("The mask is of a different size than the images (%r vs %r)" %
+                (mask.size, im1.size), mask)
+      
+      diff = ImageChops.multiply(diff, mask.convert(diff.mode))
+  
+  if max(diff.getextrema()) != (0, 0):
+    return ("The images differ", diff)
+  else:
+    return None
+  
+  
+  
\ No newline at end of file