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| 1 // Copyright 2017 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 #ifndef CC_TREES_CLIP_EXPANDER_H_ |
| 6 #define CC_TREES_CLIP_EXPANDER_H_ |
| 7 |
| 8 #include "cc/base/cc_export.h" |
| 9 #include "ui/gfx/geometry/rect.h" |
| 10 |
| 11 namespace cc { |
| 12 |
| 13 class PropertyTrees; |
| 14 |
| 15 class CC_EXPORT ClipExpander { |
| 16 public: |
| 17 explicit ClipExpander(int filter_effect_id); |
| 18 ClipExpander(const ClipExpander& other); |
| 19 |
| 20 bool operator==(const ClipExpander& other) const; |
| 21 |
| 22 bool operator!=(const ClipExpander& other) const { return !(*this == other); } |
| 23 |
| 24 // Maps "forward" to determine which pixels in a destination rect are affected |
| 25 // by pixels in the given source rect. |
| 26 gfx::Rect MapRect(const gfx::Rect& rect, |
| 27 const PropertyTrees* property_trees) const; |
| 28 |
| 29 // Maps "backward" to determine which pixels in the source affect the pixels |
| 30 // in the given destination rect. |
| 31 gfx::Rect MapRectReverse(const gfx::Rect& rect, |
| 32 const PropertyTrees* property_trees) const; |
| 33 |
| 34 // The id of the effect node in whose transform space the expansion happens. |
| 35 int target_effect_id() const { return target_effect_id_; } |
| 36 |
| 37 private: |
| 38 int target_effect_id_; |
| 39 }; |
| 40 |
| 41 } // namespace cc |
| 42 |
| 43 #endif // CC_TREES_CLIP_EXPANDER_H_ |
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