PresentationTime QML Type

The PresentationTime extension provides a way to track rendering timing for a surface. Client can request feedbacks associated with a surface, then compositor send events for the feedback with the time when the surface is presented on-screen.

PresentationTime corresponds to the Wayland wp_presentation interface.

To provide the functionality of the presentationtime extension in a compositor, create an instance of the PresentationTime component and add it to the list of extensions supported by the compositor:

Then, call sendFeedback() when a surface is presented on screen. Usually, the timing can be obtained from drm page flip event.

import QtWayland.Compositor.PresentationTime

WaylandCompositor {
    PresentationTime {
        id: presentationTime
    }
}

void sendFeedback(Window window, int sequence, int sec, int nsec)▲