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31 #ifndef WebGLImageBufferSurface_h
32 #define WebGLImageBufferSurface_h
34 #include "platform/graphics/ImageBufferSurface.h"
35 #include "third_party/skia/include/core/SkBitmap.h"
36 #include "wtf/OwnPtr.h"
39 class WebGraphicsContext3DProvider;
44 // This is a GPU backed surface that has no canvas or render target.
45 class PLATFORM_EXPORT WebGLImageBufferSurface : public ImageBufferSurface {
46 WTF_MAKE_NONCOPYABLE(WebGLImageBufferSurface); WTF_MAKE_FAST_ALLOCATED;
48 WebGLImageBufferSurface(const IntSize&, OpacityMode = NonOpaque);
49 virtual ~WebGLImageBufferSurface();
51 virtual SkCanvas* canvas() const OVERRIDE { return 0; }
52 virtual const SkBitmap& bitmap() const OVERRIDE { return m_bitmap; }
53 virtual bool isValid() const OVERRIDE { return m_bitmap.pixelRef(); }
54 virtual bool isAccelerated() const OVERRIDE { return true; }
55 virtual Platform3DObject getBackingTexture() const OVERRIDE;
56 virtual bool cachedBitmapEnabled() const OVERRIDE { return true; }
57 virtual const SkBitmap& cachedBitmap() const OVERRIDE { return m_cachedBitmap; }
58 virtual void invalidateCachedBitmap() OVERRIDE;
59 virtual void updateCachedBitmapIfNeeded() OVERRIDE;
63 // This raw-pixel based SkBitmap works as a cache at CPU side to avoid heavy cost
64 // on readback from GPU side to CPU side in some cases.
65 SkBitmap m_cachedBitmap;
66 OwnPtr<blink::WebGraphicsContext3DProvider> m_contextProvider;
70 } // namespace WebCore