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diff --git a/examples/quick/rendercontrol/window_multithreaded.h b/examples/quick/rendercontrol/window_multithreaded.h
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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * 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.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "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 THE COPYRIGHT
+** OWNER 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef WINDOW_MULTITHREADED_H
+#define WINDOW_MULTITHREADED_H
+
+#include <QWindow>
+#include <QMatrix4x4>
+#include <QThread>
+#include <QWaitCondition>
+#include <QMutex>
+
+QT_FORWARD_DECLARE_CLASS(QOpenGLContext)
+QT_FORWARD_DECLARE_CLASS(QOpenGLFramebufferObject)
+QT_FORWARD_DECLARE_CLASS(QOffscreenSurface)
+QT_FORWARD_DECLARE_CLASS(QQuickRenderControl)
+QT_FORWARD_DECLARE_CLASS(QQuickWindow)
+QT_FORWARD_DECLARE_CLASS(QQmlEngine)
+QT_FORWARD_DECLARE_CLASS(QQmlComponent)
+QT_FORWARD_DECLARE_CLASS(QQuickItem)
+
+class CubeRenderer;
+
+class QuickRenderer : public QObject
+{
+    Q_OBJECT
+
+public:
+    QuickRenderer();
+
+    void requestInit();
+    void requestRender();
+    void requestResize();
+    void requestStop();
+
+    QWaitCondition *cond() { return &m_cond; }
+    QMutex *mutex() { return &m_mutex; }
+
+    void setContext(QOpenGLContext *ctx) { m_context = ctx; }
+    void setSurface(QOffscreenSurface *s) { m_surface = s; }
+    void setWindow(QWindow *w) { m_window = w; }
+    void setQuickWindow(QQuickWindow *w) { m_quickWindow = w; }
+    void setRenderControl(QQuickRenderControl *r) { m_renderControl = r; }
+
+    void aboutToQuit();
+
+private:
+    bool event(QEvent *e) Q_DECL_OVERRIDE;
+    void init();
+    void cleanup();
+    void ensureFbo();
+    void render(QMutexLocker *lock);
+
+    QWaitCondition m_cond;
+    QMutex m_mutex;
+    QOpenGLContext *m_context;
+    QOffscreenSurface *m_surface;
+    QOpenGLFramebufferObject *m_fbo;
+    QWindow *m_window;
+    QQuickWindow *m_quickWindow;
+    QQuickRenderControl *m_renderControl;
+    CubeRenderer *m_cubeRenderer;
+    QMutex m_quitMutex;
+    bool m_quit;
+};
+
+class WindowMultiThreaded : public QWindow
+{
+    Q_OBJECT
+
+public:
+    WindowMultiThreaded();
+    ~WindowMultiThreaded();
+
+protected:
+    void exposeEvent(QExposeEvent *e) Q_DECL_OVERRIDE;
+    void resizeEvent(QResizeEvent *e) Q_DECL_OVERRIDE;
+    void mousePressEvent(QMouseEvent *e) Q_DECL_OVERRIDE;
+    void mouseReleaseEvent(QMouseEvent *e) Q_DECL_OVERRIDE;
+    bool event(QEvent *e) Q_DECL_OVERRIDE;
+
+private slots:
+    void run();
+    void requestUpdate();
+    void polishSyncAndRender();
+
+private:
+    void startQuick(const QString &filename);
+    void updateSizes();
+
+    QuickRenderer *m_quickRenderer;
+    QThread *m_quickRendererThread;
+
+    QOpenGLContext *m_context;
+    QOffscreenSurface *m_offscreenSurface;
+    QQuickRenderControl *m_renderControl;
+    QQuickWindow *m_quickWindow;
+    QQmlEngine *m_qmlEngine;
+    QQmlComponent *m_qmlComponent;
+    QQuickItem *m_rootItem;
+    bool m_quickInitialized;
+    bool m_psrRequested;
+};
+
+#endif