1/* 2 * Copyright (C) 2011 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 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 27#include "config.h" 28 29#include "SharedGraphicsContext3D.h" 30 31#include "Extensions3D.h" 32#include <wtf/MainThread.h> 33 34namespace WebCore { 35 36class SharedGraphicsContext3DImpl { 37public: 38 SharedGraphicsContext3DImpl() : m_context(0) { } 39 PassRefPtr<GraphicsContext3D> getOrCreateContext() 40 { 41 bool wasCreated = false; 42 43 // If we lost the context, or can't make it current, create a new one. 44 if (m_context && (!m_context->makeContextCurrent() || (m_context->getExtensions()->getGraphicsResetStatusARB() != GraphicsContext3D::NO_ERROR))) 45 m_context.clear(); 46 47 if (!m_context) { 48 createContext(); 49 wasCreated = true; 50 } 51 52 if (m_context && !m_context->makeContextCurrent()) 53 m_context.clear(); 54 55 if (m_context && wasCreated) 56 m_context->getExtensions()->pushGroupMarkerEXT("SharedGraphicsContext"); 57 return m_context; 58 } 59 60 PassRefPtr<GraphicsContext3D> getContext() 61 { 62 return m_context; 63 } 64 65 PassRefPtr<GraphicsContext3D> createContext() 66 { 67 GraphicsContext3D::Attributes attributes; 68 attributes.depth = false; 69 attributes.stencil = true; 70 attributes.antialias = false; 71 attributes.shareResources = true; 72 m_context = GraphicsContext3D::create(attributes, 0); 73 return m_context; 74 } 75private: 76 RefPtr<GraphicsContext3D> m_context; 77}; 78 79PassRefPtr<GraphicsContext3D> SharedGraphicsContext3D::get() 80{ 81 DEFINE_STATIC_LOCAL(SharedGraphicsContext3DImpl, impl, ()); 82 return impl.getOrCreateContext(); 83} 84 85enum ContextOperation { 86 Get, Create 87}; 88 89static PassRefPtr<GraphicsContext3D> getOrCreateContextForImplThread(ContextOperation op) 90{ 91 DEFINE_STATIC_LOCAL(SharedGraphicsContext3DImpl, impl, ()); 92 return op == Create ? impl.createContext() : impl.getContext(); 93} 94 95PassRefPtr<GraphicsContext3D> SharedGraphicsContext3D::getForImplThread() 96{ 97 return getOrCreateContextForImplThread(Get); 98} 99 100bool SharedGraphicsContext3D::haveForImplThread() 101{ 102 ASSERT(isMainThread()); 103 return getOrCreateContextForImplThread(Get); 104} 105 106bool SharedGraphicsContext3D::createForImplThread() 107{ 108 ASSERT(isMainThread()); 109 return getOrCreateContextForImplThread(Create); 110} 111 112} 113 114