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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_HEADS_UP_DISPLAY_LAYER_IMPL_H_
#define CC_HEADS_UP_DISPLAY_LAYER_IMPL_H_
#include "base/memory/scoped_ptr.h"
#include "base/time.h"
#include "cc/cc_export.h"
#include "cc/font_atlas.h"
#include "cc/layer_impl.h"
#include "cc/scoped_resource.h"
class SkCanvas;
class SkPaint;
struct SkRect;
namespace cc {
class DebugRectHistory;
class FontAtlas;
class FrameRateCounter;
class PaintTimeCounter;
class CC_EXPORT HeadsUpDisplayLayerImpl : public LayerImpl {
public:
static scoped_ptr<HeadsUpDisplayLayerImpl> create(LayerTreeImpl* treeImpl, int id)
{
return make_scoped_ptr(new HeadsUpDisplayLayerImpl(treeImpl, id));
}
virtual ~HeadsUpDisplayLayerImpl();
void setFontAtlas(scoped_ptr<FontAtlas>);
virtual void willDraw(ResourceProvider*) OVERRIDE;
virtual void appendQuads(QuadSink&, AppendQuadsData&) OVERRIDE;
void updateHudTexture(ResourceProvider*);
virtual void didDraw(ResourceProvider*) OVERRIDE;
virtual void didLoseOutputSurface() OVERRIDE;
virtual bool layerIsAlwaysDamaged() const OVERRIDE;
private:
struct Graph {
Graph(double indicatorValue, double startUpperBound);
// Eases the upper bound, which limits what is currently visible in the graph,
// so that the graph always scales to either it's max or defaultUpperBound.
static double updateUpperBound(Graph*);
double value;
double min;
double max;
double currentUpperBound;
const double defaultUpperBound;
const double indicator;
};
HeadsUpDisplayLayerImpl(LayerTreeImpl* treeImpl, int id);
virtual const char* layerTypeAsString() const OVERRIDE;
void drawHudContents(SkCanvas*);
void drawTextLeftAligned(SkCanvas*, SkPaint*, const SkRect& bounds, const std::string& text);
void drawTextRightAligned(SkCanvas*, SkPaint*, const SkRect& bounds, const std::string& text);
void drawGraphBackground(SkCanvas*, SkPaint*, const SkRect& bounds);
void drawGraphLines(SkCanvas*, SkPaint*, const SkRect& bounds, const Graph&);
int drawFPSDisplay(SkCanvas*, FrameRateCounter*, const int& top);
int drawPaintTimeDisplay(SkCanvas*, PaintTimeCounter*, const int& top);
void drawDebugRects(SkCanvas*, DebugRectHistory*);
scoped_ptr<FontAtlas> m_fontAtlas;
scoped_ptr<ScopedResource> m_hudTexture;
scoped_ptr<SkCanvas> m_hudCanvas;
Graph m_fpsGraph;
Graph m_paintTimeGraph;
base::TimeTicks m_timeOfLastGraphUpdate;
};
} // namespace cc
#endif // CC_HEADS_UP_DISPLAY_LAYER_IMPL_H_
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