QWaylandOutput Class

The QWaylandOutput class represents a displayable area managed by the compositor. More...

Header: #include <QWaylandOutput>
CMake: find_package(Qt6 REQUIRED COMPONENTS WaylandCompositor)
target_link_libraries(mytarget PRIVATE Qt6::WaylandCompositor)
qmake: QT += waylandcompositor
Instantiated By: WaylandOutput
Inherits: QWaylandObject

Public Types

enum Subpixel { SubpixelUnknown, SubpixelNone, SubpixelHorizontalRgb, SubpixelHorizontalBgr, SubpixelVerticalRgb, SubpixelVerticalBgr }
enum Transform { TransformNormal, Transform90, Transform180, Transform270, TransformFlipped, …, TransformFlipped270 }

Properties

Public Functions

QWaylandOutput(QWaylandCompositor *compositor, QWindow *window)
virtual ~QWaylandOutput() override
void addMode(const QWaylandOutputMode &mode, bool preferred = false)
QRect availableGeometry() const
QWaylandCompositor *compositor() const
QWaylandOutputMode currentMode() const
void frameStarted()
QRect geometry() const
QString manufacturer() const
QString model() const
QList<QWaylandOutputMode> modes() const
QSize physicalSize() const
QPoint position() const
int scaleFactor() const
void sendFrameCallbacks()
void setAvailableGeometry(const QRect &availableGeometry)
void setCurrentMode(const QWaylandOutputMode &mode)
void setManufacturer(const QString &manufacturer)
void setModel(const QString &model)
void setPhysicalSize(const QSize &size)
void setPosition(const QPoint &pt)
void setScaleFactor(int scale)
void setSizeFollowsWindow(bool follow)
void setSubpixel(const QWaylandOutput::Subpixel &subpixel)
void setTransform(const QWaylandOutput::Transform &transform)
void setWindow(QWindow *window)
bool sizeFollowsWindow() const
QWaylandOutput::Subpixel subpixel() const
QWaylandOutput::Transform transform() const
virtual void update()
QWindow *window() const

Signals

void availableGeometryChanged()
void compositorChanged()
void geometryChanged()
void manufacturerChanged()
void modelChanged()
void physicalSizeChanged()
void positionChanged()
void scaleFactorChanged()
void sizeFollowsWindowChanged()
void subpixelChanged()
void transformChanged()
void windowChanged()

Static Public Members

QWaylandOutput *fromResource(wl_resource *resource)

Detailed Description

The QWaylandOutput manages a rectangular area within bounds of the compositor's geometry, to use it for displaying client content. This could, for instance, be a screen managed by the WaylandCompositor.

The class corresponds to the wl_output interface in the Wayland protocol.

Member Type Documentation

enum QWaylandOutput::Subpixel

This enum type is used to specify the subpixel arrangement of a QWaylandOutput.

ConstantValueDescription
QWaylandOutput::SubpixelUnknown0The subpixel arrangement is not set.
QWaylandOutput::SubpixelNone1There are no subpixels.
QWaylandOutput::SubpixelHorizontalRgb2The subpixels are arranged horizontally in red, green, blue order.
QWaylandOutput::SubpixelHorizontalBgr3The subpixels are arranged horizontally in blue, green, red order.
QWaylandOutput::SubpixelVerticalRgb4The subpixels are arranged vertically in red, green, blue order.
QWaylandOutput::SubpixelVerticalBgr5The subpixels are arranged vertically in blue, green, red order.

See also QWaylandOutput::subpixel.

enum QWaylandOutput::Transform

* * This enum type is used to specify the orientation of a QWaylandOutput. * *

ConstantValueDescription
QWaylandOutput::TransformNormal0The orientation is normal. *
QWaylandOutput::Transform901The orientation is rotated 90 degrees. *
QWaylandOutput::Transform1802The orientation is rotated 180 degrees. *
QWaylandOutput::Transform2703The orientation is rotated 270 degrees. *
QWaylandOutput::TransformFlipped4The orientation is mirrored. *
QWaylandOutput::TransformFlipped905The orientation is mirrored, and rotated 90 degrees. *
QWaylandOutput::TransformFlipped1806The orientation is mirrored, and rotated 180 degrees. *
QWaylandOutput::TransformFlipped2707The orientation is mirrored, and rotated 270 degrees. * *

See also QWaylandOutput::transform.

Property Documentation

availableGeometry : QRect

This property holds the geometry of the QWaylandOutput available for displaying content. The available geometry is in output coordinates space, starts from 0,0 and it's as big as the output by default.

Access functions:

QRect availableGeometry() const
void setAvailableGeometry(const QRect &availableGeometry)

Notifier signal:

void availableGeometryChanged()

See also QWaylandOutput::currentMode and QWaylandOutput::geometry.

[read-only] geometry : const QRect

This property holds the geometry of the QWaylandOutput.

Access functions:

QRect geometry() const

Notifier signal:

void geometryChanged()

See also QWaylandOutput::currentMode.

manufacturer : QString

This property holds a textual description of the manufacturer of this QWaylandOutput.

Access functions:

QString manufacturer() const
void setManufacturer(const QString &manufacturer)

Notifier signal:

void manufacturerChanged()

model : QString

This property holds a textual description of the model of this QWaylandOutput.

Access functions:

QString model() const
void setModel(const QString &model)

Notifier signal:

void modelChanged()

physicalSize : QSize

This property holds the physical size of the QWaylandOutput in millimeters.

Access functions:

QSize physicalSize() const
void setPhysicalSize(const QSize &size)

Notifier signal:

void physicalSizeChanged()

See also QWaylandOutput::geometry and QWaylandOutput::currentMode.

position : QPoint

This property holds the position of this QWaylandOutput in the compositor's coordinate system.

Access functions:

QPoint position() const
void setPosition(const QPoint &pt)

Notifier signal:

void positionChanged()

scaleFactor : int

This property holds the factor by which the QWaylandCompositor scales surface buffers before they are displayed. This is used on high density output devices where unscaled content would be too small to be practical. The client can in turn set the scale factor of its buffer to match the output if it prefers to provide high resolution content that is suitable for the output device.

The default is 1 (no scaling).

Access functions:

int scaleFactor() const
void setScaleFactor(int scale)

Notifier signal:

void scaleFactorChanged()

sizeFollowsWindow : bool

This property controls whether the size of the QWaylandOutput matches the size of its window.

If this property is true, all modes previously added are replaced by a mode that matches window size and screen refresh rate.

The default is false.

Access functions:

bool sizeFollowsWindow() const
void setSizeFollowsWindow(bool follow)

Notifier signal:

void sizeFollowsWindowChanged()

subpixel : QWaylandOutput::Subpixel

This property holds the subpixel arrangement of this QWaylandOutput. The default is QWaylandOutput::SubpixelUnknown.

Access functions:

QWaylandOutput::Subpixel subpixel() const
void setSubpixel(const QWaylandOutput::Subpixel &subpixel)

Notifier signal:

void subpixelChanged()

transform : QWaylandOutput::Transform

This property holds the transformation that the QWaylandCompositor applies to a surface to compensate for the orientation of the QWaylandOutput.

The default is QWaylandOutput::TransformNormal.

Access functions:

QWaylandOutput::Transform transform() const
void setTransform(const QWaylandOutput::Transform &transform)

Notifier signal:

void transformChanged()

window : QWindow*

This property holds the QWindow for this QWaylandOutput.

Access functions:

QWindow *window() const
void setWindow(QWindow *window)

Notifier signal:

void windowChanged()

Member Function Documentation

QWaylandOutput::QWaylandOutput(QWaylandCompositor *compositor, QWindow *window)

Constructs a QWaylandOutput in compositor and with the specified window. The create() function must be called on the compositor before constructing a QWaylandOutput for it.

The QWaylandOutput object is initialized later, in reaction to an event. At this point it is added as an output for the compositor. If it is the first QWaylandOutput object created for this compositor, it becomes the default output.

[override virtual] QWaylandOutput::~QWaylandOutput()

Destroys the QWaylandOutput.

void QWaylandOutput::addMode(const QWaylandOutputMode &mode, bool preferred = false)

Adds the mode mode to the output and mark it as preferred if preferred is true. Please note there can only be one preferred mode.

QWaylandCompositor *QWaylandOutput::compositor() const

Returns the compositor for this QWaylandOutput.

Note: Getter function for property compositor.

QWaylandOutputMode QWaylandOutput::currentMode() const

Returns the output's size in pixels and refresh rate in mHz. If the current mode is not set it will return an invalid mode.

See also setCurrentMode(), QWaylandOutput::modes, and QWaylandOutputMode.

void QWaylandOutput::frameStarted()

Informs QWaylandOutput that a frame has started.

[static] QWaylandOutput *QWaylandOutput::fromResource(wl_resource *resource)

Returns the QWaylandOutput corresponding to resource.

QList<QWaylandOutputMode> QWaylandOutput::modes() const

Returns the list of modes.

void QWaylandOutput::sendFrameCallbacks()

Sends pending frame callbacks.

void QWaylandOutput::setCurrentMode(const QWaylandOutputMode &mode)

Sets the current mode. The mode mode must have been previously added.

See also currentMode(), QWaylandOutput::modes, and QWaylandOutputMode.

[virtual] void QWaylandOutput::update()

Schedules a QEvent::UpdateRequest to be delivered to the QWaylandOutput's window.

See also QWindow::requestUpdate().

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