QWaylandView Class

The QWaylandView class represents a view of a surface on an output. 更多...

头: #include <QWaylandView>
CMake: find_package(Qt6 REQUIRED COMPONENTS WaylandCompositor)
target_link_libraries(mytarget PRIVATE Qt6::WaylandCompositor)
qmake: QT += waylandcompositor
实例化: WaylandView
继承: QObject

特性

公共函数

QWaylandView (QObject * renderObject = nullptr, QObject * parent = nullptr)
virtual ~QWaylandView () override
virtual bool advance ()
bool allowDiscardFrontBuffer () const
virtual void bufferCommitted (const QWaylandBufferRef & buffer , const QRegion & damage )
virtual QWaylandBufferRef currentBuffer ()
virtual QRegion currentDamage ()
virtual void discardCurrentBuffer ()
bool isBufferLocked () const
bool isPrimary () const
QWaylandOutput * output () const
void setAllowDiscardFrontBuffer (bool discard )
void setBufferLocked (bool locked )
void setOutput (QWaylandOutput * output )
void setPrimary ()
void setSurface (QWaylandSurface * surface )
QWaylandSurface * surface () const
struct wl_resource * surfaceResource () const

信号

void allowDiscardFrontBufferChanged ()
void bufferLockedChanged ()
void outputChanged ()
void surfaceChanged ()

详细描述

The QWaylandView corresponds to the presentation of a surface on a specific output, managing the buffers that contain the contents to be rendered. You can have several views into the same surface.

特性文档编制

allowDiscardFrontBuffer : bool

By default, the view locks the current buffer until advance () is called. Set this property to true to allow Qt to release the buffer when the primary view is no longer using it.

This can be used to avoid the situation where a secondary view that updates on a lower frequency will throttle the frame rate of the client application.

访问函数:

bool allowDiscardFrontBuffer () const
void setAllowDiscardFrontBuffer (bool discard )

通知程序信号:

void allowDiscardFrontBufferChanged ()

bufferLocked : bool

This property holds whether the view's buffer is currently locked. When the buffer is locked, advance () will not advance to the next buffer and returns false .

默认为 false .

访问函数:

bool isBufferLocked () const
void setBufferLocked (bool locked )

通知程序信号:

void bufferLockedChanged ()

output : QWaylandOutput *

This property holds the output on which this view displays its surface.

访问函数:

QWaylandOutput * output () const
void setOutput (QWaylandOutput * output )

通知程序信号:

void outputChanged ()

surface : QWaylandSurface *

This property holds the surface viewed by this QWaylandView .

访问函数:

QWaylandSurface * surface () const
void setSurface (QWaylandSurface * surface )

通知程序信号:

void surfaceChanged ()

成员函数文档编制

QWaylandView:: QWaylandView ( QObject * renderObject = nullptr, QObject * parent = nullptr)

Constructs a QWaylandView with the given renderObject and parent .

[override virtual noexcept] QWaylandView:: ~QWaylandView ()

销毁 QWaylandView .

[虚拟] bool QWaylandView:: advance ()

Updates the current buffer and damage region to the latest version committed by the client. Returns true if new content was committed since the previous call to advance(). Otherwise returns false.

另请参阅 currentBuffer () 和 currentDamage ().

[虚拟] void QWaylandView:: bufferCommitted (const QWaylandBufferRef & buffer , const QRegion & damage )

This function is called when a new buffer is committed to this view's surface. damage contains the region that is different from the current buffer, i.e. the region that needs to be updated. The new buffer will become current on the next call to advance ().

Subclasses that reimplement this function must call the base implementation.

[虚拟] QWaylandBufferRef QWaylandView:: currentBuffer ()

Returns a reference to this view's current buffer.

[虚拟] QRegion QWaylandView:: currentDamage ()

Returns the current damage region of this view.

[虚拟] void QWaylandView:: discardCurrentBuffer ()

Force the view to discard its current buffer, to allow it to be reused on the client side.

bool QWaylandView:: isPrimary () const

返回 true,若此 QWaylandView is the primary view for the QWaylandSurface

另请参阅 QWaylandSurface::primaryView .

void QWaylandView:: setPrimary ()

Makes this QWaylandView the primary view for the surface.

It has no effect if this QWaylandView is not holding any QWaylandSurface

另请参阅 isPrimary () 和 QWaylandSurface::primaryView .

struct wl_resource *QWaylandView:: surfaceResource () const

Returns the Wayland surface resource for this QWaylandView .