chrome/browser/chromeos/login/screenshot_testing/SkDiffPixelsMetric.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // WARNING! This file is copied from third_party/skia/tools/skpdiff and slightly
   6 // modified to be compilable outside Skia and suit chromium style. Some comments
   7 // can make no sense.
   8 // TODO(elizavetai): remove this file and reuse the original one in Skia
   9
  10 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENSHOT_TESTING_SKDIFFPIXELSMETRIC_H_
  11 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENSHOT_TESTING_SKDIFFPIXELSMETRIC_H_
  12
  13 #include "chrome/browser/chromeos/login/screenshot_testing/SkImageDiffer.h"
  14
  15 /**
  16  * A differ that measures the percentage of different corresponding pixels. If
  17  * the two images are
  18  * not the same size or have no pixels, the result will always be zero.
  19  */
  20 class SkDifferentPixelsMetric {
  21  public:
  22   virtual bool diff(SkBitmap* baseline,
  23                     SkBitmap* test,
  24                     const SkImageDiffer::BitmapsToCreate& bitmapsToCreate,
  25                     SkImageDiffer::Result* result);
  26 };
  27
  28 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENSHOT_TESTING_SKDIFFPIXELSMETRIC_H_