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diff --git a/examples/quick/rendercontrol/window_singlethreaded.cpp b/examples/quick/rendercontrol/window_singlethreaded.cpp
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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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "window_singlethreaded.h"
+#include "cuberenderer.h"
+#include <QOpenGLContext>
+#include <QOpenGLFunctions>
+#include <QOpenGLFramebufferObject>
+#include <QOpenGLShaderProgram>
+#include <QOpenGLVertexArrayObject>
+#include <QOpenGLBuffer>
+#include <QOpenGLVertexArrayObject>
+#include <QOffscreenSurface>
+#include <QQmlEngine>
+#include <QQmlComponent>
+#include <QQuickItem>
+#include <QQuickWindow>
+#include <QQuickRenderControl>
+#include <QCoreApplication>
+
+WindowSingleThreaded::WindowSingleThreaded()
+    : m_rootItem(0),
+      m_fbo(0),
+      m_quickInitialized(false),
+      m_quickReady(false)
+{
+    setSurfaceType(QSurface::OpenGLSurface);
+
+    QSurfaceFormat format;
+    // Qt Quick may need a depth and stencil buffer. Always make sure these are available.
+    format.setDepthBufferSize(16);
+    format.setStencilBufferSize(8);
+    setFormat(format);
+
+    m_context = new QOpenGLContext;
+    m_context->setFormat(format);
+    m_context->create();
+
+    m_offscreenSurface = new QOffscreenSurface;
+    // Pass m_context->format(), not format. Format does not specify and color buffer
+    // sizes, while the context, that has just been created, reports a format that has
+    // these values filled in. Pass this to the offscreen surface to make sure it will be
+    // compatible with the context's configuration.
+    m_offscreenSurface->setFormat(m_context->format());
+    m_offscreenSurface->create();
+
+    m_cubeRenderer = new CubeRenderer;
+
+    m_renderControl = new QQuickRenderControl(this);
+
+    // Create a QQuickWindow that is associated with out render control. Note that this
+    // window never gets created or shown, meaning that it will never get an underlying
+    // native (platform) window.
+    m_quickWindow = new QQuickWindow(m_renderControl);
+
+    // Create a QML engine.
+    m_qmlEngine = new QQmlEngine;
+    if (!m_qmlEngine->incubationController())
+        m_qmlEngine->setIncubationController(m_quickWindow->incubationController());
+
+    // When Quick says there is a need to render, we will not render immediately. Instead,
+    // a timer with a small interval is used to get better performance.
+    m_updateTimer.setSingleShot(true);
+    m_updateTimer.setInterval(5);
+    connect(&m_updateTimer, &QTimer::timeout, this, &WindowSingleThreaded::render);
+
+    // Now hook up the signals. For simplicy we don't differentiate between
+    // renderRequested (only render is needed, no sync) and sceneChanged (polish and sync
+    // is needed too).
+    connect(m_quickWindow, &QQuickWindow::sceneGraphInitialized, this, &WindowSingleThreaded::createFbo);
+    connect(m_quickWindow, &QQuickWindow::sceneGraphInvalidated, this, &WindowSingleThreaded::destroyFbo);
+    connect(m_renderControl, &QQuickRenderControl::renderRequested, this, &WindowSingleThreaded::requestUpdate);
+    connect(m_renderControl, &QQuickRenderControl::sceneChanged, this, &WindowSingleThreaded::requestUpdate);
+}
+
+WindowSingleThreaded::~WindowSingleThreaded()
+{
+    // Make sure the context is current while doing cleanup. Note that we use the
+    // offscreen surface here because passing 'this' at this point is not safe: the
+    // underlying platform window may already be destroyed. To avoid all the trouble, use
+    // another surface that is valid for sure.
+    m_context->makeCurrent(m_offscreenSurface);
+
+    // Delete the render control first since it will free the scenegraph resources.
+    // Destroy the QQuickWindow only afterwards.
+    delete m_renderControl;
+
+    delete m_qmlComponent;
+    delete m_quickWindow;
+    delete m_qmlEngine;
+    delete m_fbo;
+
+    m_context->doneCurrent();
+
+    delete m_offscreenSurface;
+    delete m_context;
+
+    delete m_cubeRenderer;
+}
+
+void WindowSingleThreaded::createFbo()
+{
+    // The scene graph has been initialized. It is now time to create an FBO and associate
+    // it with the QQuickWindow.
+    m_fbo = new QOpenGLFramebufferObject(size(), QOpenGLFramebufferObject::CombinedDepthStencil);
+    m_quickWindow->setRenderTarget(m_fbo);
+}
+
+void WindowSingleThreaded::destroyFbo()
+{
+    delete m_fbo;
+    m_fbo = 0;
+}
+
+void WindowSingleThreaded::render()
+{
+    if (!m_context->makeCurrent(m_offscreenSurface))
+        return;
+
+    // Polish, synchronize and render the next frame (into our fbo).  In this example
+    // everything happens on the same thread and therefore all three steps are performed
+    // in succession from here. In a threaded setup the render() call would happen on a
+    // separate thread.
+    m_renderControl->polishItems();
+    m_renderControl->sync();
+    m_renderControl->render();
+
+    m_quickWindow->resetOpenGLState();
+    QOpenGLFramebufferObject::bindDefault();
+
+    m_quickReady = true;
+
+    // Get something onto the screen.
+    m_cubeRenderer->render(this, m_context, m_quickReady ? m_fbo->texture() : 0);
+}
+
+void WindowSingleThreaded::requestUpdate()
+{
+    if (!m_updateTimer.isActive())
+        m_updateTimer.start();
+}
+
+void WindowSingleThreaded::run()
+{
+    disconnect(m_qmlComponent, SIGNAL(statusChanged(QQmlComponent::Status)), this, SLOT(run()));
+
+    if (m_qmlComponent->isError()) {
+        QList<QQmlError> errorList = m_qmlComponent->errors();
+        foreach (const QQmlError &error, errorList)
+            qWarning() << error.url() << error.line() << error;
+        return;
+    }
+
+    QObject *rootObject = m_qmlComponent->create();
+    if (m_qmlComponent->isError()) {
+        QList<QQmlError> errorList = m_qmlComponent->errors();
+        foreach (const QQmlError &error, errorList)
+            qWarning() << error.url() << error.line() << error;
+        return;
+    }
+
+    m_rootItem = qobject_cast<QQuickItem *>(rootObject);
+    if (!m_rootItem) {
+        qWarning("run: Not a QQuickItem");
+        delete rootObject;
+        return;
+    }
+
+    // The root item is ready. Associate it with the window.
+    m_rootItem->setParentItem(m_quickWindow->contentItem());
+
+    // Update item and rendering related geometries.
+    updateSizes();
+
+    // Initialize the render control and our OpenGL resources.
+    m_context->makeCurrent(m_offscreenSurface);
+    m_renderControl->initialize(m_context);
+    m_quickInitialized = true;
+}
+
+void WindowSingleThreaded::updateSizes()
+{
+    // Behave like SizeRootObjectToView.
+    m_rootItem->setWidth(width());
+    m_rootItem->setHeight(height());
+
+    m_quickWindow->setGeometry(0, 0, width(), height());
+
+    m_cubeRenderer->resize(width(), height());
+}
+
+void WindowSingleThreaded::startQuick(const QString &filename)
+{
+    m_qmlComponent = new QQmlComponent(m_qmlEngine, QUrl(filename));
+    if (m_qmlComponent->isLoading())
+        connect(m_qmlComponent, &QQmlComponent::statusChanged, this, &WindowSingleThreaded::run);
+    else
+        run();
+}
+
+void WindowSingleThreaded::exposeEvent(QExposeEvent *)
+{
+    if (isExposed()) {
+        m_cubeRenderer->render(this, m_context, m_quickReady ? m_fbo->texture() : 0);
+        if (!m_quickInitialized)
+            startQuick(QStringLiteral("qrc:/rendercontrol/demo.qml"));
+    }
+}
+
+void WindowSingleThreaded::resizeEvent(QResizeEvent *)
+{
+    // If this is a resize after the scene is up and running, recreate the fbo and the
+    // Quick item and scene.
+    if (m_rootItem && m_context->makeCurrent(m_offscreenSurface)) {
+        delete m_fbo;
+        createFbo();
+        m_context->doneCurrent();
+        updateSizes();
+    }
+}
+
+void WindowSingleThreaded::mousePressEvent(QMouseEvent *e)
+{
+    // Use the constructor taking localPos and screenPos. That puts localPos into the
+    // event's localPos and windowPos, and screenPos into the event's screenPos. This way
+    // the windowPos in e is ignored and is replaced by localPos. This is necessary
+    // because QQuickWindow thinks of itself as a top-level window always.
+    QMouseEvent mappedEvent(e->type(), e->localPos(), e->screenPos(), e->button(), e->buttons(), e->modifiers());
+    QCoreApplication::sendEvent(m_quickWindow, &mappedEvent);
+}
+
+void WindowSingleThreaded::mouseReleaseEvent(QMouseEvent *e)
+{
+    QMouseEvent mappedEvent(e->type(), e->localPos(), e->screenPos(), e->button(), e->buttons(), e->modifiers());
+    QCoreApplication::sendEvent(m_quickWindow, &mappedEvent);
+}