1 /* 2 * Copyright (c) 2013, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef WebGLImageBufferSurface_h 32 #define WebGLImageBufferSurface_h 33 34 #include "platform/graphics/ImageBufferSurface.h" 35 #include "third_party/skia/include/core/SkBitmap.h" 36 #include "wtf/OwnPtr.h" 37 38 namespace blink { 39 40 class WebGraphicsContext3DProvider; 41 42 // This is a GPU backed surface that has no canvas or render target. 43 class PLATFORM_EXPORT WebGLImageBufferSurface : public ImageBufferSurface { 44 WTF_MAKE_NONCOPYABLE(WebGLImageBufferSurface); WTF_MAKE_FAST_ALLOCATED; 45 public: 46 WebGLImageBufferSurface(const IntSize&, OpacityMode = NonOpaque); 47 virtual ~WebGLImageBufferSurface(); 48 canvas()49 virtual SkCanvas* canvas() const OVERRIDE { return 0; } bitmap()50 virtual const SkBitmap& bitmap() OVERRIDE { return m_bitmap; } isValid()51 virtual bool isValid() const OVERRIDE { return m_bitmap.pixelRef(); } isAccelerated()52 virtual bool isAccelerated() const OVERRIDE { return true; } 53 virtual Platform3DObject getBackingTexture() const OVERRIDE; 54 virtual void didModifyBackingTexture() OVERRIDE; cachedBitmapEnabled()55 virtual bool cachedBitmapEnabled() const OVERRIDE { return true; } cachedBitmap()56 virtual const SkBitmap& cachedBitmap() const OVERRIDE { return m_cachedBitmap; } 57 virtual void invalidateCachedBitmap() OVERRIDE; 58 virtual void updateCachedBitmapIfNeeded() OVERRIDE; 59 60 private: 61 SkBitmap m_bitmap; 62 // This raw-pixel based SkBitmap works as a cache at CPU side to avoid heavy cost 63 // on readback from GPU side to CPU side in some cases. 64 SkBitmap m_cachedBitmap; 65 OwnPtr<WebGraphicsContext3DProvider> m_contextProvider; 66 }; 67 68 } // namespace blink 69 70 #endif 71