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* Copyright (c) 2013, Google Inc. All rights reserved.
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* modification, are permitted provided that the following conditions are
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*
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*/
#ifndef ImageBufferSurface_h
#define ImageBufferSurface_h
#include "platform/PlatformExport.h"
#include "platform/geometry/IntSize.h"
#include "platform/graphics/GraphicsTypes3D.h"
#include "wtf/FastAllocBase.h"
#include "wtf/Noncopyable.h"
class SkCanvas;
class SkBitmap;
namespace blink { class WebLayer; }
namespace WebCore {
class ImageBuffer;
enum OpacityMode {
NonOpaque,
Opaque,
};
class PLATFORM_EXPORT ImageBufferSurface {
WTF_MAKE_NONCOPYABLE(ImageBufferSurface); WTF_MAKE_FAST_ALLOCATED;
public:
virtual ~ImageBufferSurface() { }
virtual SkCanvas* canvas() const = 0;
virtual const SkBitmap& bitmap() const;
virtual void willUse() { } // Called by ImageBuffer before reading or writing to the surface.
virtual bool isValid() const = 0;
virtual bool restore() { return false; };
virtual blink::WebLayer* layer() const { return 0; };
virtual bool isAccelerated() const { return false; }
virtual Platform3DObject getBackingTexture() const { return 0; }
virtual bool cachedBitmapEnabled() const { return false; }
virtual const SkBitmap& cachedBitmap() const;
virtual void invalidateCachedBitmap() { }
virtual void updateCachedBitmapIfNeeded() { }
virtual void setIsHidden(bool) { }
virtual void setImageBuffer(ImageBuffer*) { }
OpacityMode opacityMode() const { return m_opacityMode; }
const IntSize& size() const { return m_size; }
void notifyIsValidChanged(bool isValid) const;
protected:
ImageBufferSurface(const IntSize&, OpacityMode);
void clear();
private:
OpacityMode m_opacityMode;
IntSize m_size;
};
} // namespace WebCore
#endif