qt-everywhere-src-5.15.1/qtbase/src/platformheaders/waylandfunctions/qwaylandwindowfunctions.h

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#ifndef QWAYLANDWINDOWFUNCTIONS_H
#define QWAYLANDWINDOWFUNCTIONS_H

#include <QtCore/QByteArray>
#include <QtGui/QGuiApplication>

QT_BEGIN_NAMESPACE

class QWindow;

class QWaylandWindowFunctions {
public:

    typedef void (*SetWindowSync)(QWindow *window);
    typedef void (*SetWindowDeSync)(QWindow *window);
    typedef bool (*IsWindowSync)(QWindow *window);
    static const QByteArray setSyncIdentifier() { return QByteArrayLiteral("WaylandSubSurfaceSetSync"); }
    static const QByteArray setDeSyncIdentifier() { return QByteArrayLiteral("WaylandSubSurfaceSetDeSync"); }
    static const QByteArray isSyncIdentifier() { return QByteArrayLiteral("WaylandSubSurfaceIsSync"); }

    static void setSync(QWindow *window)
    {
        static SetWindowSync func = reinterpret_cast<SetWindowSync>(QGuiApplication::platformFunction(setSyncIdentifier()));
        Q_ASSERT(func);
        func(window);
    }

    static void setDeSync(QWindow *window)
    {
        static SetWindowDeSync func = reinterpret_cast<SetWindowDeSync>(QGuiApplication::platformFunction(setDeSyncIdentifier()));
        Q_ASSERT(func);
        func(window);
    }

    static bool isSync(QWindow *window)
    {
        static IsWindowSync func = reinterpret_cast<IsWindowSync>(QGuiApplication::platformFunction(isSyncIdentifier()));
        Q_ASSERT(func);
        return func(window);
    }

};

QT_END_NAMESPACE

#endif // QWAYLANDWINDOWFUNCTIONS_H