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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 CC_OVERDRAW_METRICS_H_
#define CC_OVERDRAW_METRICS_H_
#include "base/memory/scoped_ptr.h"
namespace gfx {
class Rect;
class Transform;
}
namespace cc {
class LayerTreeHost;
class LayerTreeHostImpl;
// FIXME: compute overdraw metrics only occasionally, not every frame.
class OverdrawMetrics {
public:
static scoped_ptr<OverdrawMetrics> create(bool recordMetricsForFrame) { return make_scoped_ptr(new OverdrawMetrics(recordMetricsForFrame)); }
// These methods are used for saving metrics during update/commit.
// Record pixels painted by WebKit into the texture updater, but does not mean the pixels were rasterized in main memory.
void didPaint(const gfx::Rect& paintedRect);
// Records that an invalid tile was culled and did not need to be painted/uploaded, and did not contribute to other tiles needing to be painted.
void didCullTilesForUpload(int count);
// Records pixels that were uploaded to texture memory.
void didUpload(const gfx::Transform& transformToTarget, const gfx::Rect& uploadRect, const gfx::Rect& opaqueRect);
// Record contents texture(s) behind present using the given number of bytes.
void didUseContentsTextureMemoryBytes(size_t contentsTextureUseBytes);
// Record RenderSurfaceImpl texture(s) being present using the given number of bytes.
void didUseRenderSurfaceTextureMemoryBytes(size_t renderSurfaceUseBytes);
// These methods are used for saving metrics during draw.
// Record pixels that were not drawn to screen.
void didCullForDrawing(const gfx::Transform& transformToTarget, const gfx::Rect& beforeCullRect, const gfx::Rect& afterCullRect);
// Record pixels that were drawn to screen.
void didDraw(const gfx::Transform& transformToTarget, const gfx::Rect& afterCullRect, const gfx::Rect& opaqueRect);
void recordMetrics(const LayerTreeHost*) const;
void recordMetrics(const LayerTreeHostImpl*) const;
// Accessors for tests.
float pixelsDrawnOpaque() const { return m_pixelsDrawnOpaque; }
float pixelsDrawnTranslucent() const { return m_pixelsDrawnTranslucent; }
float pixelsCulledForDrawing() const { return m_pixelsCulledForDrawing; }
float pixelsPainted() const { return m_pixelsPainted; }
float pixelsUploadedOpaque() const { return m_pixelsUploadedOpaque; }
float pixelsUploadedTranslucent() const { return m_pixelsUploadedTranslucent; }
int tilesCulledForUpload() const { return m_tilesCulledForUpload; }
private:
enum MetricsType {
UpdateAndCommit,
DrawingToScreen
};
explicit OverdrawMetrics(bool recordMetricsForFrame);
template<typename LayerTreeHostType>
void recordMetricsInternal(MetricsType, const LayerTreeHostType*) const;
// When false this class is a giant no-op.
bool m_recordMetricsForFrame;
// These values are used for saving metrics during update/commit.
// Count of pixels that were painted due to invalidation.
float m_pixelsPainted;
// Count of pixels uploaded to textures and known to be opaque.
float m_pixelsUploadedOpaque;
// Count of pixels uploaded to textures and not known to be opaque.
float m_pixelsUploadedTranslucent;
// Count of tiles that were invalidated but not uploaded.
int m_tilesCulledForUpload;
// Count the number of bytes in contents textures.
unsigned long long m_contentsTextureUseBytes;
// Count the number of bytes in RenderSurfaceImpl textures.
unsigned long long m_renderSurfaceTextureUseBytes;
// These values are used for saving metrics during draw.
// Count of pixels that are opaque (and thus occlude). Ideally this is no more than wiewport width x height.
float m_pixelsDrawnOpaque;
// Count of pixels that are possibly translucent, and cannot occlude.
float m_pixelsDrawnTranslucent;
// Count of pixels not drawn as they are occluded by somthing opaque.
float m_pixelsCulledForDrawing;
};
} // namespace cc
#endif // CC_OVERDRAW_METRICS_H_
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