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diff --git a/src/webengine/api/qtwebengineglobal.cpp b/src/webengine/api/qtwebengineglobal.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qtwebengineglobal.h"
+
+#include <private/qsgcontext_p.h>
+#include <QGuiApplication>
+
+static QOpenGLContext *shareContext;
+
+static void deleteShareContext()
+{
+ delete shareContext;
+ shareContext = 0;
+}
+
+void QWebEngine::initialize()
+{
+ QCoreApplication *app = QCoreApplication::instance();
+ if (!app) {
+ qFatal("QWebEngine::initialize() must be called after the construction of the application object.");
+ return;
+ }
+ if (app->thread() != QThread::currentThread()) {
+ qFatal("QWebEngine::initialize() must be called from the Qt gui thread.");
+ return;
+ }
+
+ if (shareContext)
+ return;
+
+ shareContext = new QOpenGLContext;
+ shareContext->create();
+ qAddPostRoutine(deleteShareContext);
+ QSGContext::setSharedOpenGLContext(shareContext);
+}
+