qsgsoftwarethreadedrenderloop_p.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QSGSOFTWARETHREADEDRENDERLOOP_H
#define QSGSOFTWARETHREADEDRENDERLOOP_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <private/qsgrenderloop_p.h>
 
QT_BEGIN_NAMESPACE
 
class QSGSoftwareRenderThread;
class QSGSoftwareContext;
 
class QSGSoftwareThreadedRenderLoop : public QSGRenderLoop
{
    Q_OBJECT
public:
    QSGSoftwareThreadedRenderLoop();
    ~QSGSoftwareThreadedRenderLoop();
 
    void show(QQuickWindow *window) override;
    void hide(QQuickWindow *window) override;
    void resize(QQuickWindow *window) override;
    void windowDestroyed(QQuickWindow *window) override;
    void exposureChanged(QQuickWindow *window) override;
    QImage grab(QQuickWindow *window) override;
    void update(QQuickWindow *window) override;
    void maybeUpdate(QQuickWindow *window) override;
    void handleUpdateRequest(QQuickWindow *window) override;
    QAnimationDriver *animationDriver() const override;
    QSGContext *sceneGraphContext() const override;
    QSGRenderContext *createRenderContext(QSGContext *) const override;
    void releaseResources(QQuickWindow *window) override;
    void postJob(QQuickWindow *window, QRunnable *job) override;
    QSurface::SurfaceType windowSurfaceType() const override;
    bool interleaveIncubation() const override;
    int flags() const override;
 
    bool event(QEvent *e) override;
 
public Q_SLOTS:
    void onAnimationStarted();
    void onAnimationStopped();
 
private:
    struct WindowData {
        QQuickWindow *window;
        QSGSoftwareRenderThread *thread;
        uint updateDuringSync : 1;
        uint forceRenderPass : 1;
    };
 
    WindowData *windowFor(QQuickWindow *window);
 
    void startOrStopAnimationTimer();
    void handleExposure(QQuickWindow *window);
    void handleObscurity(WindowData *w);
    void scheduleUpdate(WindowData *w);
    void handleResourceRelease(WindowData *w, bool destroying);
    void polishAndSync(WindowData *w, bool inExpose);
 
    QSGSoftwareContext *m_sg;
    QAnimationDriver *m_anim;
    int animationTimer = 0;
    bool lockedForSync = false;
    QList<WindowData> m_windows;
 
    friend class QSGSoftwareRenderThread;
};
 
QT_END_NAMESPACE
 
#endif // QSGSOFTWARETHREADEDRENDERLOOP_H