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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 SERVICES_GFX_COMPOSITOR_GRAPH_TRANSFORM_PAIR_H_ | 5 #ifndef SERVICES_GFX_COMPOSITOR_GRAPH_TRANSFORM_PAIR_H_ |
| 6 #define SERVICES_GFX_COMPOSITOR_GRAPH_TRANSFORM_PAIR_H_ | 6 #define SERVICES_GFX_COMPOSITOR_GRAPH_TRANSFORM_PAIR_H_ |
| 7 | 7 |
| 8 #include "third_party/skia/include/utils/SkMatrix44.h" | 8 #include "third_party/skia/include/core/SkMatrix44.h" |
| 9 | 9 |
| 10 namespace compositor { | 10 namespace compositor { |
| 11 | 11 |
| 12 // Contains information about a transformation and its inverse. | 12 // Contains information about a transformation and its inverse. |
| 13 // The inverse is computed lazily and cached. | 13 // The inverse is computed lazily and cached. |
| 14 class TransformPair { | 14 class TransformPair { |
| 15 public: | 15 public: |
| 16 TransformPair(const SkMatrix44& forward); | 16 TransformPair(const SkMatrix44& forward); |
| 17 ~TransformPair(); | 17 ~TransformPair(); |
| 18 | 18 |
| 19 // Gets the forward transformation. | 19 // Gets the forward transformation. |
| 20 const SkMatrix44& forward() const { return forward_; } | 20 const SkMatrix44& forward() const { return forward_; } |
| 21 | 21 |
| 22 // Gets the inverse transformation. | 22 // Gets the inverse transformation. |
| 23 const SkMatrix44& GetInverse() const; | 23 const SkMatrix44& GetInverse() const; |
| 24 | 24 |
| 25 // Maps a point using the inverse transformation. | 25 // Maps a point using the inverse transformation. |
| 26 const SkPoint InverseMapPoint(const SkPoint& point) const; | 26 const SkPoint InverseMapPoint(const SkPoint& point) const; |
| 27 | 27 |
| 28 private: | 28 private: |
| 29 const SkMatrix44 forward_; | 29 const SkMatrix44 forward_; |
| 30 mutable SkMatrix44 cached_inverse_; | 30 mutable SkMatrix44 cached_inverse_; |
| 31 mutable bool cached_inverse_valid_ = false; | 31 mutable bool cached_inverse_valid_ = false; |
| 32 }; | 32 }; |
| 33 | 33 |
| 34 } // namespace compositor | 34 } // namespace compositor |
| 35 | 35 |
| 36 #endif // SERVICES_GFX_COMPOSITOR_GRAPH_TRANSFORM_PAIR_H_ | 36 #endif // SERVICES_GFX_COMPOSITOR_GRAPH_TRANSFORM_PAIR_H_ |
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