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104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
/*
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* Copyright (C) 2009 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "core/html/canvas/WebGLObject.h"
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namespace blink {
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WebGLObject::WebGLObject(WebGLRenderingContextBase*)
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: m_object(0)
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, m_attachmentCount(0)
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, m_deleted(false)
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{
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}
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WebGLObject::~WebGLObject()
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{
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// Verify that platform objects have been explicitly deleted.
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ASSERT(m_deleted);
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}
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void WebGLObject::setObject(Platform3DObject object)
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{
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// object==0 && m_deleted==false indicating an uninitialized state;
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ASSERT(!m_object && !m_deleted);
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m_object = object;
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}
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void WebGLObject::deleteObject(blink::WebGraphicsContext3D* context3d)
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{
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m_deleted = true;
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if (!m_object)
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return;
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if (!hasGroupOrContext())
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return;
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if (!m_attachmentCount) {
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if (!context3d)
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context3d = getAWebGraphicsContext3D();
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if (context3d)
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deleteObjectImpl(context3d, m_object);
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m_object = 0;
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}
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}
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void WebGLObject::detach()
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{
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m_attachmentCount = 0; // Make sure OpenGL resource is deleted.
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}
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void WebGLObject::detachAndDeleteObject()
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{
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// Helper method that pairs detachment with platform object
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// deletion.
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//
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// With Oilpan enabled, objects may end up being finalized without
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// having been detached first. Consequently, the objects force
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// detachment first before deleting the platform object. Without
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// Oilpan, the objects will have been detached from the 'parent'
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// objects first and do not separately require it when finalizing.
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//
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// However, as detach() is trivial, the individual WebGL
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// destructors will always call detachAndDeleteObject() rather
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// than do it based on Oilpan being enabled.
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detach();
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deleteObject(0);
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}
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void WebGLObject::onDetached(blink::WebGraphicsContext3D* context3d)
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{
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if (m_attachmentCount)
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--m_attachmentCount;
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if (m_deleted)
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deleteObject(context3d);
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}
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}
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