Index: cc/trees/clip_expander.h |
diff --git a/cc/trees/clip_expander.h b/cc/trees/clip_expander.h |
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+++ b/cc/trees/clip_expander.h |
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+// Copyright 2017 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. |
+ |
+#ifndef CC_TREES_CLIP_EXPANDER_H_ |
+#define CC_TREES_CLIP_EXPANDER_H_ |
+ |
+#include "cc/base/cc_export.h" |
+#include "ui/gfx/geometry/rect.h" |
+ |
+namespace cc { |
+ |
+class PropertyTrees; |
+ |
+class CC_EXPORT ClipExpander { |
+ public: |
+ explicit ClipExpander(int filter_effect_id); |
+ ClipExpander(const ClipExpander& other); |
+ |
+ bool operator==(const ClipExpander& other) const; |
+ |
+ bool operator!=(const ClipExpander& other) const { return !(*this == other); } |
+ |
+ // Maps "forward" to determine which pixels in a destination rect are affected |
+ // by pixels in the given source rect. |
+ gfx::Rect MapRect(const gfx::Rect& rect, |
+ const PropertyTrees* property_trees) const; |
+ |
+ // Maps "backward" to determine which pixels in the source affect the pixels |
+ // in the given destination rect. |
+ gfx::Rect MapRectReverse(const gfx::Rect& rect, |
+ const PropertyTrees* property_trees) const; |
+ |
+ // The id of the effect node in whose transform space the expansion happens. |
+ int target_effect_id() const { return target_effect_id_; } |
+ |
+ private: |
+ int target_effect_id_; |
+}; |
+ |
+} // namespace cc |
+ |
+#endif // CC_TREES_CLIP_EXPANDER_H_ |