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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CC_TEST_PIXEL_COMPARATOR_H_ | 5 #ifndef CC_TEST_PIXEL_COMPARATOR_H_ |
| 6 #define CC_TEST_PIXEL_COMPARATOR_H_ | 6 #define CC_TEST_PIXEL_COMPARATOR_H_ |
| 7 | 7 |
| 8 #include "base/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
| 9 #include "third_party/skia/include/core/SkBitmap.h" | 9 #include "third_party/skia/include/core/SkBitmap.h" |
| 10 | 10 |
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| 22 // Exact pixel comparator. Counts the number of pixel with an error. | 22 // Exact pixel comparator. Counts the number of pixel with an error. |
| 23 class ExactPixelComparator : public PixelComparator { | 23 class ExactPixelComparator : public PixelComparator { |
| 24 public: | 24 public: |
| 25 explicit ExactPixelComparator(const bool discard_alpha); | 25 explicit ExactPixelComparator(const bool discard_alpha); |
| 26 virtual ~ExactPixelComparator() {} | 26 virtual ~ExactPixelComparator() {} |
| 27 | 27 |
| 28 // Returns true if the two bitmaps are identical. Otherwise, returns false | 28 // Returns true if the two bitmaps are identical. Otherwise, returns false |
| 29 // and report the number of pixels with an error on LOG(ERROR). Differences | 29 // and report the number of pixels with an error on LOG(ERROR). Differences |
| 30 // in the alpha channel are ignored. | 30 // in the alpha channel are ignored. |
| 31 virtual bool Compare(const SkBitmap& actual_bmp, | 31 virtual bool Compare(const SkBitmap& actual_bmp, |
| 32 const SkBitmap& expected_bmp) const OVERRIDE; | 32 const SkBitmap& expected_bmp) const override; |
| 33 | 33 |
| 34 private: | 34 private: |
| 35 // Exclude alpha channel from comparison? | 35 // Exclude alpha channel from comparison? |
| 36 bool discard_alpha_; | 36 bool discard_alpha_; |
| 37 }; | 37 }; |
| 38 | 38 |
| 39 // Fuzzy pixel comparator. Counts small and arbitrary errors separately and | 39 // Fuzzy pixel comparator. Counts small and arbitrary errors separately and |
| 40 // computes average and maximum absolute errors per color channel. | 40 // computes average and maximum absolute errors per color channel. |
| 41 class FuzzyPixelComparator : public PixelComparator { | 41 class FuzzyPixelComparator : public PixelComparator { |
| 42 public: | 42 public: |
| 43 FuzzyPixelComparator(const bool discard_alpha, | 43 FuzzyPixelComparator(const bool discard_alpha, |
| 44 const float error_pixels_percentage_limit, | 44 const float error_pixels_percentage_limit, |
| 45 const float small_error_pixels_percentage_limit, | 45 const float small_error_pixels_percentage_limit, |
| 46 const float avg_abs_error_limit, | 46 const float avg_abs_error_limit, |
| 47 const int max_abs_error_limit, | 47 const int max_abs_error_limit, |
| 48 const int small_error_threshold); | 48 const int small_error_threshold); |
| 49 virtual ~FuzzyPixelComparator() {} | 49 virtual ~FuzzyPixelComparator() {} |
| 50 | 50 |
| 51 // Computes error metrics and returns true if the errors don't exceed the | 51 // Computes error metrics and returns true if the errors don't exceed the |
| 52 // specified limits. Otherwise, returns false and reports the error metrics on | 52 // specified limits. Otherwise, returns false and reports the error metrics on |
| 53 // LOG(ERROR). Differences in the alpha channel are ignored. | 53 // LOG(ERROR). Differences in the alpha channel are ignored. |
| 54 virtual bool Compare(const SkBitmap& actual_bmp, | 54 virtual bool Compare(const SkBitmap& actual_bmp, |
| 55 const SkBitmap& expected_bmp) const OVERRIDE; | 55 const SkBitmap& expected_bmp) const override; |
| 56 | 56 |
| 57 private: | 57 private: |
| 58 // Exclude alpha channel from comparison? | 58 // Exclude alpha channel from comparison? |
| 59 bool discard_alpha_; | 59 bool discard_alpha_; |
| 60 // Limit for percentage of pixels with an error. | 60 // Limit for percentage of pixels with an error. |
| 61 float error_pixels_percentage_limit_; | 61 float error_pixels_percentage_limit_; |
| 62 // Limit for percentage of pixels with a small error. | 62 // Limit for percentage of pixels with a small error. |
| 63 float small_error_pixels_percentage_limit_; | 63 float small_error_pixels_percentage_limit_; |
| 64 // Limit for average absolute error (excluding identical pixels). | 64 // Limit for average absolute error (excluding identical pixels). |
| 65 float avg_abs_error_limit_; | 65 float avg_abs_error_limit_; |
| 66 // Limit for largest absolute error. | 66 // Limit for largest absolute error. |
| 67 int max_abs_error_limit_; | 67 int max_abs_error_limit_; |
| 68 // Threshold for small errors. | 68 // Threshold for small errors. |
| 69 int small_error_threshold_; | 69 int small_error_threshold_; |
| 70 }; | 70 }; |
| 71 | 71 |
| 72 // All pixels can be off by one, but any more than that is an error. | 72 // All pixels can be off by one, but any more than that is an error. |
| 73 class FuzzyPixelOffByOneComparator : public FuzzyPixelComparator { | 73 class FuzzyPixelOffByOneComparator : public FuzzyPixelComparator { |
| 74 public: | 74 public: |
| 75 explicit FuzzyPixelOffByOneComparator(bool discard_alpha) | 75 explicit FuzzyPixelOffByOneComparator(bool discard_alpha) |
| 76 : FuzzyPixelComparator(discard_alpha, 100.f, 0.f, 1.f, 1, 0) {} | 76 : FuzzyPixelComparator(discard_alpha, 100.f, 0.f, 1.f, 1, 0) {} |
| 77 }; | 77 }; |
| 78 | 78 |
| 79 } // namespace cc | 79 } // namespace cc |
| 80 | 80 |
| 81 #endif // CC_TEST_PIXEL_COMPARATOR_H_ | 81 #endif // CC_TEST_PIXEL_COMPARATOR_H_ |
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