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 30 namespace WebCore { 31 32 WebGLObject::WebGLObject(WebGLRenderingContext*) 33 : m_object(0) 34 , m_attachmentCount(0) 35 , m_deleted(false) 36 { 37 } 38 39 WebGLObject::~WebGLObject() 40 { 41 } 42 43 void WebGLObject::setObject(Platform3DObject object) 44 { 45 // object==0 && m_deleted==false indicating an uninitialized state; 46 ASSERT(!m_object && !m_deleted); 47 m_object = object; 48 } 49 50 void WebGLObject::deleteObject(GraphicsContext3D* context3d) 51 { 52 m_deleted = true; 53 if (!m_object) 54 return; 55 56 if (!hasGroupOrContext()) 57 return; 58 59 if (!m_attachmentCount) { 60 if (!context3d) 61 context3d = getAGraphicsContext3D(); 62 63 if (context3d) 64 deleteObjectImpl(context3d, m_object); 65 66 m_object = 0; 67 } 68 } 69 70 void WebGLObject::detach() 71 { 72 m_attachmentCount = 0; // Make sure OpenGL resource is deleted. 73 } 74 75 76 void WebGLObject::onDetached(GraphicsContext3D* context3d) 77 { 78 if (m_attachmentCount) 79 --m_attachmentCount; 80 if (m_deleted) 81 deleteObject(context3d); 82 } 83 84 } 85