movierenderer.h

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#ifndef MOVIERENDERER_H
#define MOVIERENDERER_H

#include <QObject>
#include <QSize>
#include <QString>
#include <QDir>
#include <QFuture>

class QOpenGLContext;
class QOpenGLFramebufferObject;
class QOffscreenSurface;
class QQuickRenderControl;
class QQuickWindow;
class QQmlEngine;
class QQmlComponent;
class QQuickItem;
class AnimationDriver;
class MovieRenderer : public QObject
{
    Q_OBJECT
    Q_PROPERTY(int progress READ progress NOTIFY progressChanged)
    Q_PROPERTY(int fileProgress READ fileProgress NOTIFY fileProgressChanged)
public:
    enum Status {
        NotRunning,
        Running
    };

    explicit MovieRenderer(QObject *parent = 0);

    void renderMovie(const QString &qmlFile, const QString &filename, const QString &outputDirectory, const QString &outputFormat, const QSize &size, qreal devicePixelRatio = 1.0, int durationMs = 1000, int fps = 24);

    ~MovieRenderer();

    int progress() const;

    bool event(QEvent *event) override;
    bool isRunning();

    int fileProgress() const;

public slots:
    void setFileProgress(int fileProgress);

signals:
    void progressChanged(int progress);
    void finished();

    void fileProgressChanged(int fileProgress);

private slots:
    void start();
    void cleanup();

    void createFbo();
    void destroyFbo();
    bool loadQML(const QString &qmlFile, const QSize &size);

    void renderNext();

    void setProgress(int progress);
    void futureFinished();


private:
    QOpenGLContext *m_context;
    QOffscreenSurface *m_offscreenSurface;
    QQuickRenderControl *m_renderControl;
    QQuickWindow *m_quickWindow;
    QQmlEngine *m_qmlEngine;
    QQmlComponent *m_qmlComponent;
    QQuickItem *m_rootItem;
    QOpenGLFramebufferObject *m_fbo;
    qreal m_dpr;
    QSize m_size;
    AnimationDriver *m_animationDriver;

    int m_progress;
    Status m_status;
    int m_duration;
    int m_fps;
    int m_frames;
    int m_currentFrame;
    QString m_outputName;
    QString m_outputFormat;
    QString m_outputDirectory;

    QVector<QFutureWatcher<void> *> m_futures;
    int m_futureCounter;
    int m_fileProgress;

};

#endif // MOVIERENDERER_H