Implementation of threaded rendering for point cloud layers. More...

#include <qgspointcloudlayerrenderer.h>

Inheritance diagram for QgsPointCloudLayerRenderer:

Public Member Functions
	QgsPointCloudLayerRenderer (QgsPointCloudLayer *layer, QgsRenderContext &context)
	Ctor. More...

	~QgsPointCloudLayerRenderer ()

QgsFeedback *	feedback () const override
	Access to feedback object of the layer renderer (may be `nullptr`) More...

bool	forceRasterRender () const override
	Returns `true` if the renderer must be rendered to a raster paint device (e.g. More...

bool	render () override
	Do the rendering (based on data stored in the class). More...

void	setLayerRenderingTimeHint (int time) override
	Sets approximate render time (in ms) for the layer to render. More...

Public Member Functions inherited from QgsMapLayerRenderer
	QgsMapLayerRenderer (const QString &layerID, QgsRenderContext *context=nullptr)
	Constructor for QgsMapLayerRenderer, with the associated layerID and render context. More...

virtual	~QgsMapLayerRenderer ()=default

QStringList	errors () const
	Returns list of errors (problems) that happened during the rendering. More...

bool	isReadyToCompose () const
	Returns whether the renderer has already drawn (at least partially) some data. More...

QString	layerId () const
	Gets access to the ID of the layer rendered by this class. More...

QgsRenderContext *	renderContext ()
	Returns the render context associated with the renderer. More...

const QgsRenderContext *	renderContext () const
	Returns the render context associated with the renderer. More...

Additional Inherited Members
Protected Attributes inherited from QgsMapLayerRenderer
QStringList	mErrors

QString	mLayerID

bool	mReadyToCompose = true
	The flag must be set to false in renderer's constructor if wants to use the smarter map redraws functionality https://github.com/qgis/QGIS-Enhancement-Proposals/issues/181. More...

Static Protected Attributes inherited from QgsMapLayerRenderer
static constexpr int	MAX_TIME_TO_USE_CACHED_PREVIEW_IMAGE = 3000
	Maximum time (in ms) to allow display of a previously cached preview image while rendering layers, before switching to a progressive rendering display. More...

Detailed Description

Implementation of threaded rendering for point cloud layers.

Note: The API is considered EXPERIMENTAL and can be changed without a notice; Not available in Python bindings

Since: QGIS 3.18

Definition at line 59 of file qgspointcloudlayerrenderer.h.

Constructor & Destructor Documentation

◆ QgsPointCloudLayerRenderer()

QgsPointCloudLayerRenderer::QgsPointCloudLayerRenderer	(	QgsPointCloudLayer *	layer,
		QgsRenderContext &	context
	)

explicit

Ctor.

Definition at line 38 of file qgspointcloudlayerrenderer.cpp.

◆ ~QgsPointCloudLayerRenderer()

QgsPointCloudLayerRenderer::~QgsPointCloudLayerRenderer ( )

default

Member Function Documentation

◆ feedback()

QgsFeedback* QgsPointCloudLayerRenderer::feedback ( ) const

inlineoverridevirtual

Access to feedback object of the layer renderer (may be nullptr)

Since: QGIS 3.0

Reimplemented from QgsMapLayerRenderer.

Definition at line 71 of file qgspointcloudlayerrenderer.h.

◆ forceRasterRender()

bool QgsPointCloudLayerRenderer::forceRasterRender ( ) const

overridevirtual

Returns true if the renderer must be rendered to a raster paint device (e.g.

QImage).

Some layer settings require layers to be effectively "flattened" while rendering maps, which is achieved by first rendering the layer onto a raster paint device and then compositing the resultant image onto the final map render.

E.g. if a layer contains features with transparency or alternative blending modes, and the effects of these opacity or blending modes should be restricted to only affect other features within the SAME layer, then a flattened raster based render is required.

Subclasses should return true whenever their corresponding layer settings require the layer to always be rendered using a raster paint device.

Since: QGIS 3.18

Reimplemented from QgsMapLayerRenderer.

Definition at line 345 of file qgspointcloudlayerrenderer.cpp.

◆ render()

bool QgsPointCloudLayerRenderer::render ( )

overridevirtual

Do the rendering (based on data stored in the class).

Returns true if the layer was completely rendered successfully (i.e. the render was not canceled early).

Implements QgsMapLayerRenderer.

Definition at line 70 of file qgspointcloudlayerrenderer.cpp.

◆ setLayerRenderingTimeHint()

void QgsPointCloudLayerRenderer::setLayerRenderingTimeHint ( int time )

overridevirtual

Sets approximate render time (in ms) for the layer to render.

This can be used to specifies a hint at the expected render times for the layer, so that the individual layer renderer subclasses can apply heuristics and determine appropriate update intervals during the render operation.

Note: Not available in Python bindings.

Since: QGIS 3.18

Reimplemented from QgsMapLayerRenderer.

Definition at line 352 of file qgspointcloudlayerrenderer.cpp.

The documentation for this class was generated from the following files:

/build/qgis-3.20.0+99unstable/src/core/pointcloud/qgspointcloudlayerrenderer.h
/build/qgis-3.20.0+99unstable/src/core/pointcloud/qgspointcloudlayerrenderer.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsPointCloudLayerRenderer()

◆ ~QgsPointCloudLayerRenderer()

Member Function Documentation

◆ feedback()

◆ forceRasterRender()

◆ render()

◆ setLayerRenderingTimeHint()