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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
#if USE(ACCELERATED_COMPOSITING)
#include "FloatRect.h"
#include "IntRect.h"
#include <wtf/Noncopyable.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class CCLayerImpl;
struct CCLayerTreeSettings;
// 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 WebCore had to repaint them, 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 CCDebugRect {
CCDebugRect(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 CCLayerTreeSettings are enabled.
class CCDebugRectHistory {
WTF_MAKE_NONCOPYABLE(CCDebugRectHistory);
public:
static PassOwnPtr<CCDebugRectHistory> create()
{
return adoptPtr(new CCDebugRectHistory());
}
// Note: Saving debug rects must happen before layers' change tracking is reset.
void saveDebugRectsForCurrentFrame(CCLayerImpl* rootLayer, const Vector<CCLayerImpl*>& renderSurfaceLayerList, const Vector<IntRect>& occludingScreenSpaceRects, const CCLayerTreeSettings&);
const Vector<CCDebugRect>& debugRects() { return m_debugRects; }
private:
CCDebugRectHistory();
void savePaintRects(CCLayerImpl*);
void savePropertyChangedRects(const Vector<CCLayerImpl*>& renderSurfaceLayerList);
void saveSurfaceDamageRects(const Vector<CCLayerImpl* >& renderSurfaceLayerList);
void saveScreenSpaceRects(const Vector<CCLayerImpl* >& renderSurfaceLayerList);
void saveOccludingRects(const Vector<IntRect>& occludingScreenSpaceRects);
Vector<CCDebugRect> m_debugRects;
};
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
#endif
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