Source/platform/graphics/Canvas2DImageBufferSurface.h

/*
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#ifndef Canvas2DImageBufferSurface_h
#define Canvas2DImageBufferSurface_h

#include "platform/graphics/Canvas2DLayerBridge.h"
#include "platform/graphics/ImageBufferSurface.h"

namespace blink {

// This shim necessary because ImageBufferSurfaces are not allowed to be RefCounted
class Canvas2DImageBufferSurface FINAL : public ImageBufferSurface {
public:
    Canvas2DImageBufferSurface(const IntSize& size, OpacityMode opacityMode = NonOpaque, int msaaSampleCount = 1)
        : ImageBufferSurface(size, opacityMode)
        , m_layerBridge(Canvas2DLayerBridge::create(size, opacityMode, msaaSampleCount))
    {
        clear();
    }

    virtual ~Canvas2DImageBufferSurface()
    {
        if (m_layerBridge)
            m_layerBridge->beginDestruction();
    }

    // ImageBufferSurface implementation
    virtual void finalizeFrame(const FloatRect &dirtyRect) OVERRIDE { m_layerBridge->finalizeFrame(dirtyRect); }
    virtual void willAccessPixels() OVERRIDE { m_layerBridge->willAccessPixels(); }
    virtual SkCanvas* canvas() const OVERRIDE { return m_layerBridge->canvas(); }
    virtual bool isValid() const OVERRIDE { return m_layerBridge && m_layerBridge->checkSurfaceValid(); }
    virtual bool restore() OVERRIDE { return m_layerBridge->restoreSurface(); }
    virtual WebLayer* layer() const OVERRIDE { return m_layerBridge->layer(); }
    virtual Platform3DObject getBackingTexture() const OVERRIDE { return m_layerBridge->getBackingTexture(); }
    virtual bool isAccelerated() const OVERRIDE { return m_layerBridge->isAccelerated(); }
    virtual void setIsHidden(bool hidden) OVERRIDE { m_layerBridge->setIsHidden(hidden); }
    virtual void setImageBuffer(ImageBuffer* imageBuffer) OVERRIDE { m_layerBridge->setImageBuffer(imageBuffer); }

private:
    RefPtr<Canvas2DLayerBridge> m_layerBridge;
};

} // namespace blink

#endif