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 DoubleBufferedTexture_h 27 #define DoubleBufferedTexture_h 28 29 #include "SharedTexture.h" 30 #include <EGL/egl.h> 31 32 namespace WebCore { 33 34 class DoubleBufferedTexture { 35 public: 36 // consumer thread functions 37 DoubleBufferedTexture(EGLContext sharedContext, SharedTextureMode mode); 38 virtual ~DoubleBufferedTexture(); 39 40 // provider thread functions 41 virtual TextureInfo* producerLock(); 42 virtual void producerRelease(); 43 virtual void producerReleaseAndSwap(); 44 EGLContext producerAcquireContext(); 45 void producerDeleteTextures(); 46 47 // consumer thread functions 48 TextureInfo* consumerLock(); 49 void consumerRelease(); 50 void consumerDeleteTextures(); 51 52 protected: 53 SharedTexture* getReadableTexture(); 54 SharedTexture* getWriteableTexture(); 55 56 SharedTexture* m_textureA; 57 SharedTexture* m_textureB; 58 59 SharedTextureMode m_sharedTextureMode; 60 private: 61 62 SharedTexture* m_writeableTexture; 63 SharedTexture* m_lockedConsumerTexture; // only used by the consumer 64 65 EGLDisplay m_display; 66 EGLContext m_pContext; 67 EGLContext m_cContext; 68 69 bool m_supportsEGLImage; 70 }; 71 72 } // namespace WebCore 73 74 #endif // DoubleBufferedTexture_h 75