QWaylandPresentationTime Class
The QWaylandPresentationTime class is an extension to get timing for on-screen presentation. More...
| Header: | #include <QWaylandPresentationTime> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS WaylandCompositor) target_link_libraries(mytarget PRIVATE Qt6::WaylandCompositor) |
| qmake: | QT += waylandcompositor |
| Since: | Qt 6.3 |
| Instantiated By: | PresentationTime |
| Inherits: | QWaylandCompositorExtensionTemplate |
Public Functions
| QWaylandPresentationTime() | |
| QWaylandPresentationTime(QWaylandCompositor *compositor) | |
| void | sendFeedback(QQuickWindow *window, quint64 sequence, quint64 tv_sec, quint32 tv_nsec) |
Reimplemented Public Functions
| virtual void | initialize() override |
Static Public Members
| const struct wl_interface * | interface() |
Detailed Description
The QWaylandPresentationTime 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.
QWaylandPresentationTime corresponds to the Wayland wp_presentation interface.
Member Function Documentation
QWaylandPresentationTime::QWaylandPresentationTime()
Constructs an empty QWaylandPresentationTime object.
QWaylandPresentationTime::QWaylandPresentationTime(QWaylandCompositor *compositor)
Constructs a QWaylandPresentationTime object for compositor.
[override virtual] void QWaylandPresentationTime::initialize()
Reimplements: QWaylandCompositorExtension::initialize().
Initializes the extension.
[static] const struct wl_interface *QWaylandPresentationTime::interface()
Returns the Wayland interface for the QWaylandPresentationTime.
[invokable] void QWaylandPresentationTime::sendFeedback(QQuickWindow *window, quint64 sequence, quint64 tv_sec, quint32 tv_nsec)
Interface to notify that a frame is presented on screen using window. If your platform supports DRM events, page_flip_handler is the proper timing to send it. The sequence is the refresh counter. tv_sec and tv_nsec hold the seconds and nanoseconds parts of the presentation timestamp, respectively.
Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.
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