1 /* 2 * Copyright 2010, The Android Open Source Project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef TileTexture_h 27 #define TileTexture_h 28 29 #include "Color.h" 30 #include "FloatRect.h" 31 #include "SkBitmap.h" 32 #include "SkRect.h" 33 #include "SkSize.h" 34 #include "TextureInfo.h" 35 36 #include <GLES2/gl2.h> 37 38 class SkCanvas; 39 40 namespace WebCore { 41 42 class TextureOwner; 43 class Tile; 44 class TransformationMatrix; 45 46 class TileTexture { 47 public: 48 // This object is to be constructed on the consumer's thread and must have 49 // a width and height greater than 0. 50 TileTexture(uint32_t w, uint32_t h); 51 virtual ~TileTexture(); 52 53 // allows consumer thread to assign ownership of the texture to the tile. It 54 // returns false if ownership cannot be transferred because the tile is busy 55 bool acquire(TextureOwner* owner); 56 bool release(TextureOwner* owner); 57 58 // set the texture owner if not busy. Return false if busy, true otherwise. 59 bool setOwner(TextureOwner* owner); 60 61 // private member accessor functions owner()62 TextureOwner* owner() { return m_owner; } // only used by the consumer thread 63 getSize()64 const SkSize& getSize() const { return m_size; } 65 66 // OpenGL ID of backing texture, 0 when not allocated 67 GLuint m_ownTextureId; 68 // these are used for dynamically (de)allocating backing graphics memory 69 void requireGLTexture(); 70 void discardGLTexture(); 71 72 void transferComplete(); 73 getTextureInfo()74 TextureInfo* getTextureInfo() { return &m_ownTextureInfo; } 75 76 // Make sure the following pureColor getter/setter are only read/written 77 // in UI thread. Therefore no need for a lock. setPure(bool pure)78 void setPure(bool pure) { m_isPureColor = pure; } isPureColor()79 bool isPureColor() {return m_isPureColor; } setPureColor(const Color & color)80 void setPureColor(const Color& color) { m_pureColor = color; setPure(true); } pureColor()81 Color pureColor() { return m_pureColor; } 82 83 void drawGL(bool isLayer, const SkRect& rect, float opacity, 84 const TransformationMatrix* transform, bool forceBlending, bool usePointSampling, 85 const FloatRect& fillPortion); 86 private: 87 TextureInfo m_ownTextureInfo; 88 SkSize m_size; 89 90 // Tile owning the texture, only modified by UI thread 91 TextureOwner* m_owner; 92 93 // When the whole tile is single color, skip the transfer queue and draw 94 // it directly through shader. 95 bool m_isPureColor; 96 Color m_pureColor; 97 }; 98 99 } // namespace WebCore 100 101 #endif // TileTexture_h 102