window_multithreaded.h Example File | Qt Quick 5.12.12

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- window_multithreaded.h Example File
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# window_multithreaded.h Example File

rendercontrol/window_multithreaded.h

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     #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) 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) override;
         void resizeEvent(QResizeEvent *e) override;
         void mousePressEvent(QMouseEvent *e) override;
         void mouseReleaseEvent(QMouseEvent *e) override;
         bool event(QEvent *e) 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