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 ImageBufferSurface_h 32 #define ImageBufferSurface_h 33 34 #include "platform/PlatformExport.h" 35 #include "platform/geometry/IntSize.h" 36 #include "platform/graphics/GraphicsTypes3D.h" 37 #include "wtf/FastAllocBase.h" 38 #include "wtf/Noncopyable.h" 39 #include "wtf/PassRefPtr.h" 40 41 class SkBitmap; 42 class SkCanvas; 43 class SkPicture; 44 45 namespace blink { 46 47 class ImageBuffer; 48 class WebLayer; 49 class FloatRect; 50 51 enum OpacityMode { 52 NonOpaque, 53 Opaque, 54 }; 55 56 class PLATFORM_EXPORT ImageBufferSurface { 57 WTF_MAKE_NONCOPYABLE(ImageBufferSurface); WTF_MAKE_FAST_ALLOCATED; 58 public: ~ImageBufferSurface()59 virtual ~ImageBufferSurface() { } 60 61 virtual SkCanvas* canvas() const = 0; 62 virtual const SkBitmap& bitmap(); willAccessPixels()63 virtual void willAccessPixels() { } 64 virtual bool isValid() const = 0; restore()65 virtual bool restore() { return false; }; layer()66 virtual WebLayer* layer() const { return 0; }; isAccelerated()67 virtual bool isAccelerated() const { return false; } getBackingTexture()68 virtual Platform3DObject getBackingTexture() const { return 0; } didModifyBackingTexture()69 virtual void didModifyBackingTexture() { } cachedBitmapEnabled()70 virtual bool cachedBitmapEnabled() const { return false; } 71 virtual const SkBitmap& cachedBitmap() const; invalidateCachedBitmap()72 virtual void invalidateCachedBitmap() { } updateCachedBitmapIfNeeded()73 virtual void updateCachedBitmapIfNeeded() { } setIsHidden(bool)74 virtual void setIsHidden(bool) { } setImageBuffer(ImageBuffer *)75 virtual void setImageBuffer(ImageBuffer*) { } 76 virtual PassRefPtr<SkPicture> getPicture(); didClearCanvas()77 virtual void didClearCanvas() { } finalizeFrame(const FloatRect & dirtyRect)78 virtual void finalizeFrame(const FloatRect &dirtyRect) { } 79 opacityMode()80 OpacityMode opacityMode() const { return m_opacityMode; } size()81 const IntSize& size() const { return m_size; } 82 void notifyIsValidChanged(bool isValid) const; 83 84 protected: 85 ImageBufferSurface(const IntSize&, OpacityMode); 86 void clear(); 87 88 private: 89 OpacityMode m_opacityMode; 90 IntSize m_size; 91 }; 92 93 } // namespace blink 94 95 #endif 96