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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_
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