/* * Copyright (C) 2011-2017 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "WebGLSharedObject.h" #if ENABLE(WEBGL) #include "WebGLContextGroup.h" #include "WebGLRenderingContextBase.h" #include <wtf/Lock.h> namespace WebCore { WebGLSharedObject::WebGLSharedObject(WebGLRenderingContextBase& context) : m_contextGroup(context.contextGroup()) { } WebGLSharedObject::~WebGLSharedObject() { if (m_contextGroup) m_contextGroup->removeObject(*this); } void WebGLSharedObject::detachContextGroup(const AbstractLocker& locker) { detach(); if (m_contextGroup) { deleteObject(locker, nullptr); m_contextGroup->removeObject(*this); m_contextGroup = nullptr; } } void WebGLSharedObject::detachContextGroupWithoutDeletingObject() { // This can be called during context teardown if the sole context // in the share group has already been removed. In this case, the // underlying WebGL object has already been implicitly deleted, so // it's not necessary to call deleteObject on it - which couldn't // be protected by the objectGraphLock. detach(); if (m_contextGroup) { m_contextGroup->removeObject(*this); m_contextGroup = nullptr; } } bool WebGLSharedObject::hasGroupOrContext() const { // Returning true from this implies that there's at least one (or, // since context sharing isn't currently implemented, exactly one) // viable context from which to grab the objectGraphLock. return m_contextGroup && m_contextGroup->hasAContext(); } GraphicsContextGL* WebGLSharedObject::getAGraphicsContextGL() const { return m_contextGroup ? &m_contextGroup->getAGraphicsContextGL() : nullptr; } WTF::Lock& WebGLSharedObject::objectGraphLockForContext() { // Should not call this if the object or context has been deleted. ASSERT(m_contextGroup); return m_contextGroup->objectGraphLockForAContext(); } } #endif // ENABLE(WEBGL)