/*
* Copyright (c) 2013, Google Inc. All rights reserved.
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#ifndef WebGLImageBufferSurface_h
#define WebGLImageBufferSurface_h
#include "platform/graphics/ImageBufferSurface.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "wtf/OwnPtr.h"
namespace blink {
class WebGraphicsContext3DProvider;
}
namespace WebCore {
// This is a GPU backed surface that has no canvas or render target.
class PLATFORM_EXPORT WebGLImageBufferSurface : public ImageBufferSurface {
WTF_MAKE_NONCOPYABLE(WebGLImageBufferSurface); WTF_MAKE_FAST_ALLOCATED;
public:
WebGLImageBufferSurface(const IntSize&, OpacityMode = NonOpaque);
virtual ~WebGLImageBufferSurface();
virtual SkCanvas* canvas() const OVERRIDE { return 0; }
virtual const SkBitmap& bitmap() const OVERRIDE { return m_bitmap; }
virtual bool isValid() const OVERRIDE { return m_bitmap.pixelRef(); }
virtual bool isAccelerated() const OVERRIDE { return true; }
virtual Platform3DObject getBackingTexture() const OVERRIDE;
virtual bool cachedBitmapEnabled() const OVERRIDE { return true; }
virtual const SkBitmap& cachedBitmap() const OVERRIDE { return m_cachedBitmap; }
virtual void invalidateCachedBitmap() OVERRIDE;
virtual void updateCachedBitmapIfNeeded() OVERRIDE;
private:
SkBitmap m_bitmap;
// This raw-pixel based SkBitmap works as a cache at CPU side to avoid heavy cost
// on readback from GPU side to CPU side in some cases.
SkBitmap m_cachedBitmap;
OwnPtr<blink::WebGraphicsContext3DProvider> m_contextProvider;
};
} // namespace WebCore
#endif