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<h1 class="title">window_multithreaded.h Example File</h1>
<span class="subtitle">rendercontrol/window_multithreaded.h</span>
<!-- $$$rendercontrol/window_multithreaded.h-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2017 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:
  **
  ** &quot;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
  ** &quot;AS IS&quot; 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,
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  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/</span>

  <span class="preprocessor">#ifndef WINDOW_MULTITHREADED_H</span>
  <span class="preprocessor">#define WINDOW_MULTITHREADED_H</span>

  <span class="preprocessor">#include &lt;QWindow&gt;</span>
  <span class="preprocessor">#include &lt;QMatrix4x4&gt;</span>
  <span class="preprocessor">#include &lt;QThread&gt;</span>
  <span class="preprocessor">#include &lt;QWaitCondition&gt;</span>
  <span class="preprocessor">#include &lt;QMutex&gt;</span>

  QT_FORWARD_DECLARE_CLASS(<span class="type">QOpenGLContext</span>)
  QT_FORWARD_DECLARE_CLASS(<span class="type">QOpenGLFramebufferObject</span>)
  QT_FORWARD_DECLARE_CLASS(<span class="type">QOffscreenSurface</span>)
  QT_FORWARD_DECLARE_CLASS(<span class="type"><a href="qquickrendercontrol.html">QQuickRenderControl</a></span>)
  QT_FORWARD_DECLARE_CLASS(<span class="type"><a href="qquickwindow.html">QQuickWindow</a></span>)
  QT_FORWARD_DECLARE_CLASS(<span class="type">QQmlEngine</span>)
  QT_FORWARD_DECLARE_CLASS(<span class="type">QQmlComponent</span>)
  QT_FORWARD_DECLARE_CLASS(<span class="type"><a href="qquickitem.html">QQuickItem</a></span>)

  <span class="keyword">class</span> CubeRenderer;

  <span class="keyword">class</span> QuickRenderer : <span class="keyword">public</span> <span class="type">QObject</span>
  {
      Q_OBJECT

  <span class="keyword">public</span>:
      QuickRenderer();

      <span class="type">void</span> requestInit();
      <span class="type">void</span> requestRender();
      <span class="type">void</span> requestResize();
      <span class="type">void</span> requestStop();

      <span class="type">QWaitCondition</span> <span class="operator">*</span><span class="type">cond</span>() { <span class="keyword">return</span> <span class="operator">&amp;</span>m_cond; }
      <span class="type">QMutex</span> <span class="operator">*</span>mutex() { <span class="keyword">return</span> <span class="operator">&amp;</span>m_mutex; }

      <span class="type">void</span> setContext(<span class="type">QOpenGLContext</span> <span class="operator">*</span>ctx) { m_context <span class="operator">=</span> ctx; }
      <span class="type">void</span> setSurface(<span class="type">QOffscreenSurface</span> <span class="operator">*</span>s) { m_surface <span class="operator">=</span> s; }
      <span class="type">void</span> setWindow(<span class="type">QWindow</span> <span class="operator">*</span>w) { m_window <span class="operator">=</span> w; }
      <span class="type">void</span> setQuickWindow(<span class="type"><a href="qquickwindow.html">QQuickWindow</a></span> <span class="operator">*</span>w) { m_quickWindow <span class="operator">=</span> w; }
      <span class="type">void</span> setRenderControl(<span class="type"><a href="qquickrendercontrol.html">QQuickRenderControl</a></span> <span class="operator">*</span>r) { m_renderControl <span class="operator">=</span> r; }

      <span class="type">void</span> aboutToQuit();

  <span class="keyword">private</span>:
      bool event(<span class="type">QEvent</span> <span class="operator">*</span>e) override;
      <span class="type">void</span> init();
      <span class="type">void</span> cleanup();
      <span class="type">void</span> ensureFbo();
      <span class="type">void</span> render(<span class="type">QMutexLocker</span> <span class="operator">*</span>lock);

      <span class="type">QWaitCondition</span> m_cond;
      <span class="type">QMutex</span> m_mutex;
      <span class="type">QOpenGLContext</span> <span class="operator">*</span>m_context;
      <span class="type">QOffscreenSurface</span> <span class="operator">*</span>m_surface;
      <span class="type">QOpenGLFramebufferObject</span> <span class="operator">*</span>m_fbo;
      <span class="type">QWindow</span> <span class="operator">*</span>m_window;
      <span class="type"><a href="qquickwindow.html">QQuickWindow</a></span> <span class="operator">*</span>m_quickWindow;
      <span class="type"><a href="qquickrendercontrol.html">QQuickRenderControl</a></span> <span class="operator">*</span>m_renderControl;
      CubeRenderer <span class="operator">*</span>m_cubeRenderer;
      <span class="type">QMutex</span> m_quitMutex;
      bool m_quit;
  };

  <span class="keyword">class</span> WindowMultiThreaded : <span class="keyword">public</span> <span class="type">QWindow</span>
  {
      Q_OBJECT

  <span class="keyword">public</span>:
      WindowMultiThreaded();
      <span class="operator">~</span>WindowMultiThreaded();

  <span class="keyword">protected</span>:
      <span class="type">void</span> exposeEvent(<span class="type">QExposeEvent</span> <span class="operator">*</span>e) override;
      <span class="type">void</span> resizeEvent(<span class="type">QResizeEvent</span> <span class="operator">*</span>e) override;
      <span class="type">void</span> mousePressEvent(<span class="type">QMouseEvent</span> <span class="operator">*</span>e) override;
      <span class="type">void</span> mouseReleaseEvent(<span class="type">QMouseEvent</span> <span class="operator">*</span>e) override;
      bool event(<span class="type">QEvent</span> <span class="operator">*</span>e) override;

  <span class="keyword">private</span> <span class="keyword">slots</span>:
      <span class="type">void</span> run();
      <span class="type">void</span> requestUpdate();
      <span class="type">void</span> polishSyncAndRender();

  <span class="keyword">private</span>:
      <span class="type">void</span> startQuick(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&amp;</span>filename);
      <span class="type">void</span> updateSizes();

      QuickRenderer <span class="operator">*</span>m_quickRenderer;
      <span class="type">QThread</span> <span class="operator">*</span>m_quickRendererThread;

      <span class="type">QOpenGLContext</span> <span class="operator">*</span>m_context;
      <span class="type">QOffscreenSurface</span> <span class="operator">*</span>m_offscreenSurface;
      <span class="type"><a href="qquickrendercontrol.html">QQuickRenderControl</a></span> <span class="operator">*</span>m_renderControl;
      <span class="type"><a href="qquickwindow.html">QQuickWindow</a></span> <span class="operator">*</span>m_quickWindow;
      <span class="type">QQmlEngine</span> <span class="operator">*</span>m_qmlEngine;
      <span class="type">QQmlComponent</span> <span class="operator">*</span>m_qmlComponent;
      <span class="type"><a href="qquickitem.html">QQuickItem</a></span> <span class="operator">*</span>m_rootItem;
      bool m_quickInitialized;
      bool m_psrRequested;
  };

  <span class="preprocessor">#endif</span>

</pre>
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<!-- @@@rendercontrol/window_multithreaded.h -->
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   their respective owners.<br/>    The documentation provided herein is licensed under the terms of the    <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation    License version 1.3</a> as published by the Free Software Foundation.<br/>    Qt and respective logos are trademarks of The Qt Company Ltd.     in Finland and/or other countries worldwide. All other trademarks are property
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