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 40 class SkCanvas; 41 class SkBitmap; 42 43 namespace blink { class WebLayer; } 44 45 namespace WebCore { 46 47 enum OpacityMode { 48 NonOpaque, 49 Opaque, 50 }; 51 52 class PLATFORM_EXPORT ImageBufferSurface { 53 WTF_MAKE_NONCOPYABLE(ImageBufferSurface); WTF_MAKE_FAST_ALLOCATED; 54 public: ~ImageBufferSurface()55 virtual ~ImageBufferSurface() { } 56 57 virtual SkCanvas* canvas() const = 0; 58 virtual const SkBitmap& bitmap() const; willUse()59 virtual void willUse() { } // Called by ImageBuffer before reading or writing to the surface. 60 virtual bool isValid() const = 0; layer()61 virtual blink::WebLayer* layer() const { return 0; }; isAccelerated()62 virtual bool isAccelerated() const { return false; } getBackingTexture()63 virtual Platform3DObject getBackingTexture() const { return 0; } 64 opacityMode()65 OpacityMode opacityMode() const { return m_opacityMode; } size()66 const IntSize& size() const { return m_size; } 67 68 protected: 69 void clear(); 70 ImageBufferSurface(const IntSize & size,OpacityMode opacityMode)71 ImageBufferSurface(const IntSize& size, OpacityMode opacityMode) 72 : m_opacityMode(opacityMode) 73 , m_size(size) 74 { } 75 76 private: 77 OpacityMode m_opacityMode; 78 IntSize m_size; 79 }; 80 81 } // namespace WebCore 82 83 #endif 84