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// Copyright 2012 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 CCDebugRectHistory_h
#define CCDebugRectHistory_h
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "FloatRect.h"
#include "IntRect.h"
#include <wtf/Vector.h>
#include <vector>
namespace cc {
class LayerImpl;
struct LayerTreeSettings;
// There are currently six types of debug rects:
//
// - Paint rects (update rects): regions of a layer that needed to be re-uploaded to the
// texture resource; in most cases implying that they had to be repainted, too.
//
// - Property-changed rects: enclosing bounds of layers that cause changes to the screen
// even if the layer did not change internally. (For example, if the layer's opacity or
// position changes.)
//
// - Surface damage rects: the aggregate damage on a target surface that is caused by all
// layers and surfaces that contribute to it. This includes (1) paint rects, (2) property-
// changed rects, and (3) newly exposed areas.
//
// - Screen space rects: this is the region the contents occupy in screen space.
//
// - Replica screen space rects: this is the region the replica's contents occupy in screen space.
//
// - Occluding rects: these are the regions that contribute to the occluded region.
//
enum DebugRectType { PaintRectType, PropertyChangedRectType, SurfaceDamageRectType, ScreenSpaceRectType, ReplicaScreenSpaceRectType, OccludingRectType };
struct DebugRect {
DebugRect(DebugRectType newType, FloatRect newRect)
: type(newType)
, rect(newRect) { }
DebugRectType type;
FloatRect rect;
};
// This class maintains a history of rects of various types that can be used
// for debugging purposes. The overhead of collecting rects is performed only if
// the appropriate LayerTreeSettings are enabled.
class DebugRectHistory {
public:
static scoped_ptr<DebugRectHistory> create();
~DebugRectHistory();
// Note: Saving debug rects must happen before layers' change tracking is reset.
void saveDebugRectsForCurrentFrame(LayerImpl* rootLayer, const std::vector<LayerImpl*>& renderSurfaceLayerList, const Vector<IntRect>& occludingScreenSpaceRects, const LayerTreeSettings&);
const Vector<DebugRect>& debugRects() { return m_debugRects; }
private:
DebugRectHistory();
void savePaintRects(LayerImpl*);
void savePropertyChangedRects(const std::vector<LayerImpl*>& renderSurfaceLayerList);
void saveSurfaceDamageRects(const std::vector<LayerImpl* >& renderSurfaceLayerList);
void saveScreenSpaceRects(const std::vector<LayerImpl* >& renderSurfaceLayerList);
void saveOccludingRects(const Vector<IntRect>& occludingScreenSpaceRects);
Vector<DebugRect> m_debugRects;
DISALLOW_COPY_AND_ASSIGN(DebugRectHistory);
};
} // namespace cc
#endif
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