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| 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 "sky/engine/config.h" | |
| 27 | |
| 28 #include "sky/engine/core/html/canvas/WebGLObject.h" | |
| 29 | |
| 30 namespace blink { | |
| 31 | |
| 32 WebGLObject::WebGLObject(WebGLRenderingContextBase*) | |
| 33 : m_object(0) | |
| 34 , m_attachmentCount(0) | |
| 35 , m_deleted(false) | |
| 36 { | |
| 37 } | |
| 38 | |
| 39 WebGLObject::~WebGLObject() | |
| 40 { | |
| 41 // Verify that platform objects have been explicitly deleted. | |
| 42 ASSERT(m_deleted); | |
| 43 } | |
| 44 | |
| 45 void 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 | |
| 52 void 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 | |
| 72 void WebGLObject::detach() | |
| 73 { | |
| 74 m_attachmentCount = 0; // Make sure OpenGL resource is deleted. | |
| 75 } | |
| 76 | |
| 77 void 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 | |
| 95 void WebGLObject::onDetached(blink::WebGraphicsContext3D* context3d) | |
| 96 { | |
| 97 if (m_attachmentCount) | |
| 98 --m_attachmentCount; | |
| 99 if (m_deleted) | |
| 100 deleteObject(context3d); | |
| 101 } | |
| 102 | |
| 103 } | |
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