[Telemetry] Migrate bitmap.py from bitmaptools.cc to numpy

tools/telemetry/telemetry/image_processing/rgba_color.py

Index: tools/telemetry/telemetry/image_processing/rgba_color.py
diff --git a/tools/telemetry/telemetry/image_processing/rgba_color.py b/tools/telemetry/telemetry/image_processing/rgba_color.py
new file mode 100644
index 0000000000000000000000000000000000000000..be3cfed7304c3b7abeb7b1f2cfc2958c9fe6ad0e
--- /dev/null
+++ b/tools/telemetry/telemetry/image_processing/rgba_color.py
@@ -0,0 +1,33 @@
+# Copyright 2014 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.
+
+import collections
+
+class RgbaColor(collections.namedtuple('RgbaColor', ['r', 'g', 'b', 'a'])):
+  """Encapsulates an RGBA color retrieved from an image."""
+  def __new__(cls, r, g, b, a=255):
+    return super(RgbaColor, cls).__new__(cls, r, g, b, a)
+
+  def __int__(self):
+    return (self.r << 16) | (self.g << 8) | self.b
+
+  def IsEqual(self, expected_color, tolerance=0):
+    """Verifies that the color is within a given tolerance of
+    the expected color."""
+    r_diff = abs(self.r - expected_color.r)
+    g_diff = abs(self.g - expected_color.g)
+    b_diff = abs(self.b - expected_color.b)
+    a_diff = abs(self.a - expected_color.a)
+    return (r_diff <= tolerance and g_diff <= tolerance
+        and b_diff <= tolerance and a_diff <= tolerance)
+
+  def AssertIsRGB(self, r, g, b, tolerance=0):
+    assert self.IsEqual(RgbaColor(r, g, b), tolerance)
+
+  def AssertIsRGBA(self, r, g, b, a, tolerance=0):
+    assert self.IsEqual(RgbaColor(r, g, b, a), tolerance)
+
+
+WEB_PAGE_TEST_ORANGE = RgbaColor(222, 100, 13)
+WHITE = RgbaColor(255, 255, 255)