////  Created by Alexander Ivash on 2018/01/08//  Copyright 2018 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include <DependencyManager.h>#include <QImage>#include <QtCore/QSharedPointer> class DesktopPreviewProvider : public QObject, public Dependency {    SINGLETON_DEPENDENCY    Q_OBJECT     DesktopPreviewProvider();    DesktopPreviewProvider(const DesktopPreviewProvider& other) = delete;     constexpr static const char* imagePaths[] = {        "images/preview-disabled.png", // USER        "images/preview-privacy.png",  // SECURE_SCREEN        "images/preview.png",          // VSYNC    }; public:    enum PreviewDisabledReasons {        USER = 0,        SECURE_SCREEN,        VSYNC // Not settable via this interface, as VSYNC is controlled by HMD plugin..    };    Q_ENUM(PreviewDisabledReasons)     static QSharedPointer<DesktopPreviewProvider> getInstance();     QImage getPreviewDisabledImage(bool vsyncEnabled) const;    void setPreviewDisabledReason(PreviewDisabledReasons reason); public slots:    void setPreviewDisabledReason(const QString& reason); private:    QImage& loadPreviewImage(QImage& image, const QString& path) const;     PreviewDisabledReasons m_previewDisabledReason = { USER };     mutable QImage m_previewDisabled[3];};