Raster renderer pipe that applies colors to a raster. More...

#include <qgsrasterrenderer.h>

Inheritance diagram for QgsRasterRenderer:

[legend]

Public Member Functions
	QgsRasterRenderer (QgsRasterInterface *input=nullptr, const QString &type=QString())
	Constructor for QgsRasterRenderer. More...

	QgsRasterRenderer (const QgsRasterRenderer &)=delete
	QgsRasterRenderer cannot be copied. Use clone() instead. More...

	~QgsRasterRenderer () override

int	alphaBand () const

int	bandCount () const override
	Get number of bands. More...

QgsRasterBlock *	block (int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback=nullptr) override=0
	Read block of data using given extent and size. More...

QgsRasterRenderer *	clone () const override=0
	Clone itself, create deep copy. More...

void	copyCommonProperties (const QgsRasterRenderer *other, bool copyMinMaxOrigin=true)
	Copies common properties like opacity / transparency data from other renderer. More...

Qgis::DataType	dataType (int bandNo) const override
	Returns data type for the band specified by number. More...

virtual void	legendSymbologyItems (QList< QPair< QString, QColor > > &symbolItems) const
	Get symbology items if provided by renderer. More...

const QgsRasterMinMaxOrigin &	minMaxOrigin () const
	Returns const reference to origin of min/max values. More...

double	opacity () const
	Returns the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque). More...

const QgsRasterRenderer &	operator= (const QgsRasterRenderer &)=delete
	QgsRasterRenderer cannot be copied. Use clone() instead. More...

const QgsRasterTransparency *	rasterTransparency () const

void	readXml (const QDomElement &rendererElem) override
	Sets base class members from xml. Usually called from create() methods of subclasses. More...

void	setAlphaBand (int band)

bool	setInput (QgsRasterInterface *input) override
	Set input. More...

void	setMinMaxOrigin (const QgsRasterMinMaxOrigin &origin)
	Sets origin of min/max values. More...

void	setOpacity (double opacity)
	Sets the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque). More...

void	setRasterTransparency (QgsRasterTransparency *t)

virtual QString	type () const

virtual QList< int >	usesBands () const
	Returns a list of band numbers used by the renderer. More...

bool	usesTransparency () const

Public Member Functions inherited from QgsRasterInterface
	QgsRasterInterface (QgsRasterInterface *input=nullptr)

virtual	~QgsRasterInterface ()=default

virtual QgsRasterBandStats	bandStatistics (int bandNo, int stats=QgsRasterBandStats::All, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0, QgsRasterBlockFeedback *feedback=nullptr)
	Get band statistics. More...

virtual int	capabilities () const
	Returns a bitmask containing the supported capabilities. More...

QString	capabilitiesString () const
	Returns the above in friendly format. More...

virtual void	cumulativeCut (int bandNo, double lowerCount, double upperCount, double &lowerValue, double &upperValue, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0)
	Find values for cumulative pixel count cut. More...

int	dataTypeSize (int bandNo)

virtual QgsRectangle	extent () const
	Get the extent of the interface. More...

virtual QString	generateBandName (int bandNumber) const
	helper function to create zero padded band names More...

virtual bool	hasHistogram (int bandNo, int binCount, double minimum=std::numeric_limits< double >::quiet_NaN(), double maximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &extent=QgsRectangle(), int sampleSize=0, bool includeOutOfRange=false)
	Returns true if histogram is available (cached, already calculated) More...

virtual bool	hasStatistics (int bandNo, int stats=QgsRasterBandStats::All, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0)
	Returns true if histogram is available (cached, already calculated). More...

virtual QgsRasterHistogram	histogram (int bandNo, int binCount=0, double minimum=std::numeric_limits< double >::quiet_NaN(), double maximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &extent=QgsRectangle(), int sampleSize=0, bool includeOutOfRange=false, QgsRasterBlockFeedback *feedback=nullptr)
	Get histogram. More...

virtual QgsRasterInterface *	input () const
	Current input. More...

virtual bool	on () const
	Is on/off. More...

virtual void	setOn (bool on)
	Set on/off. More...

virtual Qgis::DataType	sourceDataType (int bandNo) const
	Returns source data type for the band specified by number, source data type may be shorter than dataType. More...

virtual const QgsRasterInterface *	sourceInput () const
	Get source / raw input, the first in pipe, usually provider. More...

virtual QgsRasterInterface *	sourceInput ()
	Get source / raw input, the first in pipe, usually provider. More...

virtual void	writeXml (QDomDocument &doc, QDomElement &parentElem) const
	Write base class members to xml. More...

virtual int	xBlockSize () const
	Get block size. More...

virtual int	xSize () const
	Get raster size. More...

virtual int	yBlockSize () const

virtual int	ySize () const

Static Public Attributes
static const QRgb	NODATA_COLOR = qRgba( 0, 0, 0, 0 )

Protected Member Functions
void	_writeXml (QDomDocument &doc, QDomElement &rasterRendererElem) const
	Write upper class info into rasterrenderer element (called by writeXml method of subclasses) More...

Protected Member Functions inherited from QgsRasterInterface
void	initHistogram (QgsRasterHistogram &histogram, int bandNo, int binCount, double minimum=std::numeric_limits< double >::quiet_NaN(), double maximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &boundingBox=QgsRectangle(), int sampleSize=0, bool includeOutOfRange=false)
	Fill in histogram defaults if not specified. More...

void	initStatistics (QgsRasterBandStats &statistics, int bandNo, int stats=QgsRasterBandStats::All, const QgsRectangle &boundingBox=QgsRectangle(), int binCount=0)
	Fill in statistics defaults if not specified. More...

Protected Attributes
int	mAlphaBand = -1
	Read alpha value from band. More...

QgsRasterMinMaxOrigin	mMinMaxOrigin
	Origin of min/max values. More...

double	mOpacity = 1.0
	Global alpha value (0-1) More...

QgsRasterTransparency *	mRasterTransparency = nullptr
	Raster transparency per color or value. Overwrites global alpha value. More...

QString	mType

Protected Attributes inherited from QgsRasterInterface
QList< QgsRasterHistogram >	mHistograms
	List of cached histograms, all bands mixed. More...

QgsRasterInterface *	mInput = nullptr

bool	mOn = true

QList< QgsRasterBandStats >	mStatistics
	List of cached statistics, all bands mixed. More...

Additional Inherited Members
Public Types inherited from QgsRasterInterface
enum	Capability { NoCapabilities = 0, Size = 1 << 1, Create = 1 << 2, Remove = 1 << 3, BuildPyramids = 1 << 4, Identify = 1 << 5, IdentifyValue = 1 << 6, IdentifyText = 1 << 7, IdentifyHtml = 1 << 8, IdentifyFeature = 1 << 9 }
	If you add to this, please also add to capabilitiesString() More...

Detailed Description

Raster renderer pipe that applies colors to a raster.

Definition at line 37 of file qgsrasterrenderer.h.

Constructor & Destructor Documentation

◆ QgsRasterRenderer() [1/2]

QgsRasterRenderer::QgsRasterRenderer	(	QgsRasterInterface *	input = `nullptr`,
		const QString &	type = `QString()`
	)

Constructor for QgsRasterRenderer.

Definition at line 30 of file qgsrasterrenderer.cpp.

◆ ~QgsRasterRenderer()

QgsRasterRenderer::~QgsRasterRenderer ( )

override

Definition at line 36 of file qgsrasterrenderer.cpp.

◆ QgsRasterRenderer() [2/2]

QgsRasterRenderer::QgsRasterRenderer ( const QgsRasterRenderer & )

delete

QgsRasterRenderer cannot be copied. Use clone() instead.

Member Function Documentation

◆ _writeXml()

void QgsRasterRenderer::_writeXml	(	QDomDocument &	doc,
		QDomElement &	rasterRendererElem
	)		const

protected

Write upper class info into rasterrenderer element (called by writeXml method of subclasses)

Definition at line 99 of file qgsrasterrenderer.cpp.

◆ alphaBand()

int QgsRasterRenderer::alphaBand ( ) const

inline

Definition at line 93 of file qgsrasterrenderer.h.

◆ bandCount()

int QgsRasterRenderer::bandCount ( ) const

overridevirtual

Get number of bands.

Implements QgsRasterInterface.

Definition at line 41 of file qgsrasterrenderer.cpp.

◆ block()

QgsRasterBlock* QgsRasterRenderer::block	(	int	bandNo,
		const QgsRectangle &	extent,
		int	width,
		int	height,
		QgsRasterBlockFeedback *	feedback = `nullptr`
	)

overridepure virtual

Read block of data using given extent and size.

Returns pointer to data. Caller is responsible to free the memory returned.

Parameters

bandNo	band number
extent	extent of block
width	pixel width of block
height	pixel height of block
feedback	optional raster feedback object for cancelation/preview. Added in QGIS 3.0.

Implements QgsRasterInterface.

Implemented in QgsPalettedRasterRenderer, QgsHillshadeRenderer, QgsSingleBandGrayRenderer, QgsSingleBandPseudoColorRenderer, QgsMultiBandColorRenderer, and QgsSingleBandColorDataRenderer.

◆ clone()

QgsRasterRenderer* QgsRasterRenderer::clone ( ) const

overridepure virtual

Clone itself, create deep copy.

Implements QgsRasterInterface.

Implemented in QgsPalettedRasterRenderer, QgsHillshadeRenderer, QgsSingleBandGrayRenderer, QgsSingleBandPseudoColorRenderer, QgsMultiBandColorRenderer, and QgsSingleBandColorDataRenderer.

◆ copyCommonProperties()

void QgsRasterRenderer::copyCommonProperties	(	const QgsRasterRenderer *	other,
		bool	copyMinMaxOrigin = `true`
	)

Copies common properties like opacity / transparency data from other renderer.

Useful when cloning renderers.

Since: QGIS 2.16

Definition at line 146 of file qgsrasterrenderer.cpp.

◆ dataType()

Qgis::DataType QgsRasterRenderer::dataType ( int bandNo ) const

overridevirtual

Returns data type for the band specified by number.

Implements QgsRasterInterface.

Definition at line 50 of file qgsrasterrenderer.cpp.

◆ legendSymbologyItems()

virtual void QgsRasterRenderer::legendSymbologyItems ( QList< QPair< QString, QColor > > & symbolItems ) const

inlinevirtual

Get symbology items if provided by renderer.

Reimplemented in QgsPalettedRasterRenderer, QgsSingleBandPseudoColorRenderer, and QgsSingleBandGrayRenderer.

Definition at line 96 of file qgsrasterrenderer.h.

◆ minMaxOrigin()

const QgsRasterMinMaxOrigin& QgsRasterRenderer::minMaxOrigin ( ) const

inline

Returns const reference to origin of min/max values.

Definition at line 111 of file qgsrasterrenderer.h.

◆ opacity()

double QgsRasterRenderer::opacity ( ) const

inline

Returns the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque).

See also: setOpacity()

Definition at line 87 of file qgsrasterrenderer.h.

◆ operator=()

const QgsRasterRenderer& QgsRasterRenderer::operator= ( const QgsRasterRenderer & )

delete

QgsRasterRenderer cannot be copied. Use clone() instead.

◆ rasterTransparency()

const QgsRasterTransparency* QgsRasterRenderer::rasterTransparency ( ) const

inline

Definition at line 90 of file qgsrasterrenderer.h.

◆ readXml()

void QgsRasterRenderer::readXml ( const QDomElement & rendererElem )

overridevirtual

Sets base class members from xml. Usually called from create() methods of subclasses.

Reimplemented from QgsRasterInterface.

Definition at line 120 of file qgsrasterrenderer.cpp.

◆ setAlphaBand()

void QgsRasterRenderer::setAlphaBand ( int band )

inline

Definition at line 92 of file qgsrasterrenderer.h.

◆ setInput()

bool QgsRasterRenderer::setInput ( QgsRasterInterface * input )

overridevirtual

Set input.

Returns true if set correctly, false if cannot use that input

Reimplemented from QgsRasterInterface.

Reimplemented in QgsSingleBandColorDataRenderer.

Definition at line 61 of file qgsrasterrenderer.cpp.

◆ setMinMaxOrigin()

void QgsRasterRenderer::setMinMaxOrigin ( const QgsRasterMinMaxOrigin & origin )

inline

Sets origin of min/max values.

Definition at line 114 of file qgsrasterrenderer.h.

◆ setOpacity()

void QgsRasterRenderer::setOpacity ( double opacity )

inline

Sets the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque).

See also: opacity()

Definition at line 80 of file qgsrasterrenderer.h.

◆ setRasterTransparency()

void QgsRasterRenderer::setRasterTransparency ( QgsRasterTransparency * t )

Definition at line 93 of file qgsrasterrenderer.cpp.

◆ type()

virtual QString QgsRasterRenderer::type ( ) const

inlinevirtual

Definition at line 63 of file qgsrasterrenderer.h.

◆ usesBands()

virtual QList<int> QgsRasterRenderer::usesBands ( ) const

inlinevirtual

Returns a list of band numbers used by the renderer.

Reimplemented in QgsPalettedRasterRenderer, QgsSingleBandPseudoColorRenderer, QgsMultiBandColorRenderer, QgsSingleBandGrayRenderer, QgsHillshadeRenderer, and QgsSingleBandColorDataRenderer.

Definition at line 108 of file qgsrasterrenderer.h.

◆ usesTransparency()

bool QgsRasterRenderer::usesTransparency ( ) const

Definition at line 84 of file qgsrasterrenderer.cpp.

Member Data Documentation

◆ mAlphaBand

int QgsRasterRenderer::mAlphaBand = -1

protected

Read alpha value from band.

Is combined with value from raster transparency / global alpha value. Default: -1 (not set)

Definition at line 131 of file qgsrasterrenderer.h.

◆ mMinMaxOrigin

QgsRasterMinMaxOrigin QgsRasterRenderer::mMinMaxOrigin

protected

Origin of min/max values.

Definition at line 134 of file qgsrasterrenderer.h.

◆ mOpacity

double QgsRasterRenderer::mOpacity = 1.0

protected

Global alpha value (0-1)

Definition at line 124 of file qgsrasterrenderer.h.

◆ mRasterTransparency

QgsRasterTransparency* QgsRasterRenderer::mRasterTransparency = nullptr

protected

Raster transparency per color or value. Overwrites global alpha value.

Definition at line 126 of file qgsrasterrenderer.h.

◆ mType

QString QgsRasterRenderer::mType

protected

Definition at line 121 of file qgsrasterrenderer.h.

◆ NODATA_COLOR

const QRgb QgsRasterRenderer::NODATA_COLOR = qRgba( 0, 0, 0, 0 )

static

Definition at line 44 of file qgsrasterrenderer.h.

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

/tmp/buildd/qgis-3.0.2+14stretch/src/core/raster/qgsrasterrenderer.h
/tmp/buildd/qgis-3.0.2+14stretch/src/core/raster/qgsrasterrenderer.cpp

Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsRasterRenderer() [1/2]

◆ ~QgsRasterRenderer()

◆ QgsRasterRenderer() [2/2]

Member Function Documentation

◆ _writeXml()

◆ alphaBand()

◆ bandCount()

◆ block()

◆ clone()

◆ copyCommonProperties()

◆ dataType()

◆ legendSymbologyItems()

◆ minMaxOrigin()

◆ opacity()

◆ operator=()

◆ rasterTransparency()

◆ readXml()

◆ setAlphaBand()

◆ setInput()

◆ setMinMaxOrigin()

◆ setOpacity()

◆ setRasterTransparency()

◆ type()

◆ usesBands()

◆ usesTransparency()

Member Data Documentation

◆ mAlphaBand

◆ mMinMaxOrigin

◆ mOpacity

◆ mRasterTransparency

◆ mType

◆ NODATA_COLOR