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// Copyright 2015 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 UI_COMPOSITOR_CLIP_RECORDER_H_
#define UI_COMPOSITOR_CLIP_RECORDER_H_
#include "base/macros.h"
#include "ui/compositor/compositor_export.h"
#include "ui/gfx/geometry/rect.h"
namespace cc {
class DisplayItem;
class DisplayItemList;
}
namespace gfx {
class Path;
class Size;
}
namespace ui {
class PaintContext;
// A class to provide scoped clips of painting to a DisplayItemList. The clip
// provided will be applied to any DisplayItems added to the DisplayItemList
// while this object is alive. In other words, any nested recorders will be
// clipped.
class COMPOSITOR_EXPORT ClipRecorder {
public:
explicit ClipRecorder(const PaintContext& context);
~ClipRecorder();
void ClipRect(const gfx::Rect& clip_rect);
void ClipPath(const gfx::Path& clip_path);
void ClipPathWithAntiAliasing(const gfx::Path& clip_path);
private:
enum Closer {
CLIP_RECT,
CLIP_PATH,
};
void RecordCloser(const gfx::Rect& bounds_in_layer, Closer);
const PaintContext& context_;
// If someone needs to do more than this many operations with a single
// ClipRecorder then we'll increase this.
enum : int { kMaxOpCount = 4 };
Closer closers_[kMaxOpCount];
gfx::Rect bounds_in_layer_[kMaxOpCount];
int num_closers_;
DISALLOW_COPY_AND_ASSIGN(ClipRecorder);
};
} // namespace ui
#endif // UI_COMPOSITOR_CLIP_RECORDER_H_
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