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.