QWaylandPresentationTime Class

The QWaylandPresentationTime class is an extension to get timing for on-screen presentation. 更多...

头：	#include <QWaylandPresentationTime>
CMake:	find_package(Qt6 REQUIRED COMPONENTS WaylandCompositor) target_link_libraries(mytarget PRIVATE Qt6::WaylandCompositor)
qmake:	QT += waylandcompositor
Since:	Qt 6.3
实例化：	PresentationTime
继承：	QWaylandCompositorExtensionTemplate

所有成员列表，包括继承成员

公共函数

	QWaylandPresentationTime ()
	QWaylandPresentationTime (QWaylandCompositor * compositor )
void	sendFeedback (QQuickWindow * window , quint64 sequence , quint64 tv_sec , quint32 tv_nsec )

重实现公共函数

virtual void

initialize () override

静态公共成员

const struct wl_interface *

interface ()

详细描述

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 接口。

成员函数文档编制

QWaylandPresentationTime:: QWaylandPresentationTime ()

Constructs an empty QWaylandPresentationTime object.

QWaylandPresentationTime:: QWaylandPresentationTime ( QWaylandCompositor * compositor )

Constructs a QWaylandPresentationTime object for compositor .

`[override virtual]` void QWaylandPresentationTime:: initialize ()

重实现： QWaylandCompositorExtension::initialize ().

Initializes the extension.

`[static]` const struct wl_interface *QWaylandPresentationTime:: interface ()

返回 Wayland 接口为 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.

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .