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Qt 6.x
The Qt SDK
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Qt 6.x
The Qt SDK
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\qmltype PresentationTime \instantiates QWaylandPresentationTime \inqmlmodule QtWayland.Compositor.PresentationTime More...
#include <qwaylandpresentationtime_p.h>
Inheritance diagram for QWaylandPresentationTime: Collaboration diagram for QWaylandPresentationTime:Signals | |
| void | presented (quint64 sequence, quint64 tv_sec, quint32 tv_nsec, quint32 refresh_nsec) |
| Signals inherited from QObject | |
| void | destroyed (QObject *=nullptr) |
| This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked. | |
| void | objectNameChanged (const QString &objectName, QPrivateSignal) |
| This signal is emitted after the object's name has been changed. | |
Public Member Functions | |
| QWaylandPresentationTime () | |
| Constructs an empty QWaylandPresentationTime object. | |
| QWaylandPresentationTime (QWaylandCompositor *compositor) | |
| Constructs a QWaylandPresentationTime object for compositor. | |
| QWaylandCompositor * | compositor () const |
| void | initialize () override |
| Initializes the extension. | |
| Q_INVOKABLE void | sendFeedback (QQuickWindow *window, quint64 sequence, quint64 tv_sec, quint32 tv_nsec) |
| \qmlmethod void PresentationTime::sendFeedback(Window window, int sequence, int sec, int nsec) | |
| Public Member Functions inherited from QWaylandCompositorExtensionTemplate< QWaylandPresentationTime > | |
| QWaylandCompositorExtensionTemplate () | |
| QWaylandCompositorExtensionTemplate (QWaylandObject *container) | |
| const struct wl_interface * | extensionInterface () const override |
A pure virtual function which should be reimplemented to return the wl_interface which corresponds to this QWaylandCompositorExtension. | |
| Public Member Functions inherited from QWaylandCompositorExtension | |
| QWaylandCompositorExtension () | |
| Creates a QWaylandCompositorExtension with no container. | |
| QWaylandCompositorExtension (QWaylandObject *container) | |
| Creates a QWaylandCompositorExtension and adds it to the extension container. | |
| ~QWaylandCompositorExtension () override | |
| QWaylandObject * | extensionContainer () const |
| void | setExtensionContainer (QWaylandObject *container) |
| Sets the extension container for this QWaylandCompositorExtension to container. | |
| virtual void | initialize () |
| Initializes the QWaylandCompositorExtension. | |
| bool | isInitialized () const |
| virtual const struct wl_interface * | extensionInterface () const =0 |
A pure virtual function which should be reimplemented to return the wl_interface which corresponds to this QWaylandCompositorExtension. | |
| Public Member Functions inherited from QWaylandObject | |
| ~QWaylandObject () override | |
| QWaylandCompositorExtension * | extension (const QByteArray &name) |
| Returns the compositor extension which matches name if one has been registered with the QWaylandObject. | |
| QWaylandCompositorExtension * | extension (const wl_interface *interface) |
| Returns the compositor extension which matches interface if one has been registered with the QWaylandObject. | |
| QList< QWaylandCompositorExtension * > | extensions () const |
| Returns the list of compositor extensions that have been registered with this QWaylandObject. | |
| void | addExtension (QWaylandCompositorExtension *extension) |
| Registers extension with this QWaylandObject. | |
| void | removeExtension (QWaylandCompositorExtension *extension) |
| Removes extension from the list of registered extensions in this QWaylandObject, if it has previously been registered using \l{addExtension()}. | |
| Public Member Functions inherited from QObject | |
| Q_INVOKABLE | QObject (QObject *parent=nullptr) |
| Constructs an object with parent object parent. | |
| virtual | ~QObject () |
| Destroys the object, deleting all its child objects. | |
| virtual bool | event (QEvent *event) |
| This virtual function receives events to an object and should return true if the event e was recognized and processed. | |
| virtual bool | eventFilter (QObject *watched, QEvent *event) |
| Filters events if this object has been installed as an event filter for the watched object. | |
| QString | objectName () const |
| Q_WEAK_OVERLOAD void | setObjectName (const QString &name) |
| Sets the object's name to name. | |
| void | setObjectName (QAnyStringView name) |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
| QBindable< QString > | bindableObjectName () |
| bool | isWidgetType () const |
Returns true if the object is a widget; otherwise returns false. | |
| bool | isWindowType () const |
Returns true if the object is a window; otherwise returns false. | |
| bool | isQuickItemType () const |
Returns true if the object is a QQuickItem; otherwise returns false. | |
| bool | signalsBlocked () const noexcept |
Returns true if signals are blocked; otherwise returns false. | |
| bool | blockSignals (bool b) noexcept |
| If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). | |
| QThread * | thread () const |
| Returns the thread in which the object lives. | |
| void | moveToThread (QThread *thread) |
| Changes the thread affinity for this object and its children. | |
| int | startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer) |
| This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds. | |
| int | startTimer (std::chrono::milliseconds time, Qt::TimerType timerType=Qt::CoarseTimer) |
| void | killTimer (int id) |
| Kills the timer with timer identifier, id. | |
| template<typename T > | |
| T | findChild (const QString &aName=QString(), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
| Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object. | |
| template<typename T > | |
| QList< T > | findChildren (const QString &aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
| Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. | |
| template<typename T > | |
| QList< T > | findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
| const QObjectList & | children () const |
| Returns a list of child objects. | |
| void | setParent (QObject *parent) |
| Makes the object a child of parent. | |
| void | installEventFilter (QObject *filterObj) |
| Installs an event filter filterObj on this object. | |
| void | removeEventFilter (QObject *obj) |
| Removes an event filter object obj from this object. | |
| QMetaObject::Connection | connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const |
| bool | disconnect (const char *signal=nullptr, const QObject *receiver=nullptr, const char *member=nullptr) const |
| bool | disconnect (const QObject *receiver, const char *member=nullptr) const |
| void | dumpObjectTree () const |
| Dumps a tree of children to the debug output. | |
| void | dumpObjectInfo () const |
| Dumps information about signal connections, etc. | |
| bool | setProperty (const char *name, const QVariant &value) |
| Sets the value of the object's name property to value. | |
| bool | setProperty (const char *name, QVariant &&value) |
| QVariant | property (const char *name) const |
| Returns the value of the object's name property. | |
| QList< QByteArray > | dynamicPropertyNames () const |
| QBindingStorage * | bindingStorage () |
| const QBindingStorage * | bindingStorage () const |
| QObject * | parent () const |
| Returns a pointer to the parent object. | |
| bool | inherits (const char *classname) const |
Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. | |
Static Public Member Functions | |
| static const struct wl_interface * | interface () |
| Returns the Wayland interface for the QWaylandPresentationTime. | |
| static QByteArray | interfaceName () |
| Static Public Member Functions inherited from QWaylandCompositorExtensionTemplate< QWaylandPresentationTime > | |
| static QWaylandPresentationTime * | findIn (QWaylandObject *container) |
| If any instance of the interface has been registered with container, this is returned. | |
| Static Public Member Functions inherited from QObject | |
| static QMetaObject::Connection | connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection) |
| \threadsafe | |
| static QMetaObject::Connection | connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection) |
| template<typename Func1 , typename Func2 > | |
| static QMetaObject::Connection | connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType *context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection) |
| template<typename Func1 , typename Func2 > | |
| static QMetaObject::Connection | connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot) |
| static bool | disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member) |
| \threadsafe | |
| static bool | disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member) |
| static bool | disconnect (const QMetaObject::Connection &) |
| Disconnect a connection. | |
| template<typename Func1 , typename Func2 > | |
| static bool | disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiver, Func2 slot) |
| template<typename Func1 > | |
| static bool | disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const QObject *receiver, void **zero) |
Additional Inherited Members | |
| Public Slots inherited from QObject | |
| void | deleteLater () |
| \threadsafe | |
| Protected Member Functions inherited from QWaylandCompositorExtensionTemplate< QWaylandPresentationTime > | |
| QWaylandCompositorExtensionTemplate (QWaylandCompositorExtensionPrivate &dd) | |
| QWaylandCompositorExtensionTemplate (QWaylandObject *container, QWaylandCompositorExtensionPrivate &dd) | |
| Protected Member Functions inherited from QWaylandCompositorExtension | |
| QWaylandCompositorExtension (QWaylandCompositorExtensionPrivate &dd) | |
| QWaylandCompositorExtension (QWaylandObject *container, QWaylandCompositorExtensionPrivate &dd) | |
| bool | event (QEvent *event) override |
| This virtual function receives events to an object and should return true if the event e was recognized and processed. | |
| Protected Member Functions inherited from QWaylandObject | |
| QWaylandObject (QObject *parent=nullptr) | |
| Creates a QWaylandObject as a child of parent. | |
| QWaylandObject (QObjectPrivate &d, QObject *parent=nullptr) | |
| Protected Member Functions inherited from QObject | |
| QObject * | sender () const |
| Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr. | |
| int | senderSignalIndex () const |
| int | receivers (const char *signal) const |
| Returns the number of receivers connected to the signal. | |
| bool | isSignalConnected (const QMetaMethod &signal) const |
| virtual void | timerEvent (QTimerEvent *event) |
| This event handler can be reimplemented in a subclass to receive timer events for the object. | |
| virtual void | childEvent (QChildEvent *event) |
| This event handler can be reimplemented in a subclass to receive child events. | |
| virtual void | customEvent (QEvent *event) |
| This event handler can be reimplemented in a subclass to receive custom events. | |
| virtual void | connectNotify (const QMetaMethod &signal) |
| virtual void | disconnectNotify (const QMetaMethod &signal) |
| QObject (QObjectPrivate &dd, QObject *parent=nullptr) | |
| Protected Attributes inherited from QWaylandObject | |
| QList< QWaylandCompositorExtension * > | extension_vector |
| Protected Attributes inherited from QObject | |
| QScopedPointer< QObjectData > | d_ptr |
| Properties inherited from QObject | |
| QString | objectName |
| the name of this object | |
| Related Symbols inherited from QObject | |
| template< class T > T | qobject_cast (const QObject *object) |
| Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr. | |
| template< typename T > T | qFindChildqFindChildren (const QObject *obj, const QString &name)() |
| template< typename T > QList< T > | qFindChildrenqFindChildren (const QObject *obj, const QString &name)() |
| QObjectList | |
| \macro Q_CLASSINFO(Name, Value) | |
\qmltype PresentationTime \instantiates QWaylandPresentationTime \inqmlmodule QtWayland.Compositor.PresentationTime
Provides tracking the timing when a frame is presented on screen.
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.
\qml import QtWayland.Compositor.PresentationTime
WaylandCompositor { PresentationTime { id: presentationTime } } \endqml
\inmodule QtWaylandCompositor
The QWaylandPresentationTime class is an extension to get timing for on-screen presentation.
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.
Definition at line 27 of file qwaylandpresentationtime_p.h.
| QWaylandPresentationTime::QWaylandPresentationTime | ( | ) |
Constructs an empty QWaylandPresentationTime object.
Definition at line 73 of file qwaylandpresentationtime.cpp.
| QWaylandPresentationTime::QWaylandPresentationTime | ( | QWaylandCompositor * | compositor | ) |
Constructs a QWaylandPresentationTime object for compositor.
Definition at line 64 of file qwaylandpresentationtime.cpp.
| QWaylandCompositor * QWaylandPresentationTime::compositor | ( | ) | const |
Definition at line 101 of file qwaylandpresentationtime.cpp.
References QWaylandCompositorExtension::extensionContainer().
Referenced by initialize(), and PresentationFeedback::sendSyncOutput().
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overridevirtual |
Initializes the extension.
Reimplemented from QWaylandCompositorExtension.
Definition at line 81 of file qwaylandpresentationtime.cpp.
References compositor(), d, QWaylandCompositorExtension::initialize(), QWaylandCompositorExtension::isInitialized(), and qWarning.
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Returns the Wayland interface for the QWaylandPresentationTime.
Definition at line 134 of file qwaylandpresentationtime.cpp.
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Definition at line 142 of file qwaylandpresentationtime.cpp.
| void QWaylandPresentationTime::sendFeedback | ( | QQuickWindow * | window, |
| quint64 | sequence, | ||
| quint64 | tv_sec, | ||
| quint32 | tv_nsec | ||
| ) |
\qmlmethod void PresentationTime::sendFeedback(Window window, int sequence, int sec, int 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. sec and nsec hold the seconds and nanoseconds parts of the presentation timestamp, respectively.
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.
Definition at line 121 of file qwaylandpresentationtime.cpp.
References emit, presented(), and window().
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1.9.7