1/* 2 * Copyright (C) 2009 Apple 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. 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 APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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#include "config.h" 27 28#include "core/html/canvas/WebGLObject.h" 29 30namespace blink { 31 32WebGLObject::WebGLObject(WebGLRenderingContextBase*) 33 : m_object(0) 34 , m_attachmentCount(0) 35 , m_deleted(false) 36{ 37} 38 39WebGLObject::~WebGLObject() 40{ 41 // Verify that platform objects have been explicitly deleted. 42 ASSERT(m_deleted); 43} 44 45void WebGLObject::setObject(Platform3DObject object) 46{ 47 // object==0 && m_deleted==false indicating an uninitialized state; 48 ASSERT(!m_object && !m_deleted); 49 m_object = object; 50} 51 52void WebGLObject::deleteObject(blink::WebGraphicsContext3D* context3d) 53{ 54 m_deleted = true; 55 if (!m_object) 56 return; 57 58 if (!hasGroupOrContext()) 59 return; 60 61 if (!m_attachmentCount) { 62 if (!context3d) 63 context3d = getAWebGraphicsContext3D(); 64 65 if (context3d) 66 deleteObjectImpl(context3d, m_object); 67 68 m_object = 0; 69 } 70} 71 72void WebGLObject::detach() 73{ 74 m_attachmentCount = 0; // Make sure OpenGL resource is deleted. 75} 76 77void WebGLObject::detachAndDeleteObject() 78{ 79 // Helper method that pairs detachment with platform object 80 // deletion. 81 // 82 // With Oilpan enabled, objects may end up being finalized without 83 // having been detached first. Consequently, the objects force 84 // detachment first before deleting the platform object. Without 85 // Oilpan, the objects will have been detached from the 'parent' 86 // objects first and do not separately require it when finalizing. 87 // 88 // However, as detach() is trivial, the individual WebGL 89 // destructors will always call detachAndDeleteObject() rather 90 // than do it based on Oilpan being enabled. 91 detach(); 92 deleteObject(0); 93} 94 95void WebGLObject::onDetached(blink::WebGraphicsContext3D* context3d) 96{ 97 if (m_attachmentCount) 98 --m_attachmentCount; 99 if (m_deleted) 100 deleteObject(context3d); 101} 102 103} 104