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diff --git a/tests/manual/rhi/hellominimalcrossgfxtriangle/window.h b/tests/manual/rhi/hellominimalcrossgfxtriangle/window.h
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+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, 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 The Qt Company Ltd 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_H
+#define WINDOW_H
+
+#include <QWindow>
+
+#include <QtGui/private/qrhinull_p.h>
+#if QT_CONFIG(opengl)
+#include <QtGui/private/qrhigles2_p.h>
+#include <QOffscreenSurface>
+#endif
+#if QT_CONFIG(vulkan)
+#include <QtGui/private/qrhivulkan_p.h>
+#endif
+#ifdef Q_OS_WIN
+#include <QtGui/private/qrhid3d11_p.h>
+#endif
+#if defined(Q_OS_MACOS) || defined(Q_OS_IOS)
+#include <QtGui/private/qrhimetal_p.h>
+#endif
+
+class Window : public QWindow
+{
+public:
+    Window(QRhi::Implementation graphicsApi);
+
+    void releaseSwapChain();
+
+protected:
+    virtual void customInit();
+    virtual void customRender();
+
+    // destruction order matters to a certain degree: the fallbackSurface must
+    // outlive the rhi, the rhi must outlive all other resources.  The resources
+    // need no special order when destroying.
+#if QT_CONFIG(opengl)
+    std::unique_ptr<QOffscreenSurface> m_fallbackSurface;
+#endif
+    std::unique_ptr<QRhi> m_rhi;
+    std::unique_ptr<QRhiSwapChain> m_sc;
+    std::unique_ptr<QRhiRenderBuffer> m_ds;
+    std::unique_ptr<QRhiRenderPassDescriptor> m_rp;
+
+    bool m_hasSwapChain = false;
+    QMatrix4x4 m_proj;
+
+private:
+    void init();
+    void resizeSwapChain();
+    void render();
+
+    void exposeEvent(QExposeEvent *) override;
+    bool event(QEvent *) override;
+
+    QRhi::Implementation m_graphicsApi;
+
+    bool m_running = false;
+    bool m_notExposed = false;
+    bool m_newlyExposed = false;
+};
+
+#endif