Renderer for multiband images with the color components. More...

#include <qgsmultibandcolorrenderer.h>

Inheritance diagram for QgsMultiBandColorRenderer:

Public Member Functions
	QgsMultiBandColorRenderer (QgsRasterInterface input, int redBand, int greenBand, int blueBand, QgsContrastEnhancement redEnhancement=nullptr, QgsContrastEnhancement greenEnhancement=nullptr, QgsContrastEnhancement blueEnhancement=nullptr)

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

	~QgsMultiBandColorRenderer () override

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

int	blueBand () const

const QgsContrastEnhancement *	blueContrastEnhancement () const

QgsMultiBandColorRenderer *	clone () const override
	Clone itself, create deep copy. More...

int	greenBand () const

const QgsContrastEnhancement *	greenContrastEnhancement () const

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

int	redBand () const

const QgsContrastEnhancement *	redContrastEnhancement () const

void	setBlueBand (int band)

void	setBlueContrastEnhancement (QgsContrastEnhancement *ce)
	Takes ownership. More...

void	setGreenBand (int band)

void	setGreenContrastEnhancement (QgsContrastEnhancement *ce)
	Takes ownership. More...

void	setRedBand (int band)

void	setRedContrastEnhancement (QgsContrastEnhancement *ce)
	Takes ownership. More...

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

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

Public Member Functions inherited from QgsRasterRenderer
	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...

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

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 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 Member Functions
static QgsRasterRenderer *	create (const QDomElement &elem, QgsRasterInterface *input)

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...

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

Protected Member Functions inherited from QgsRasterRenderer
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 inherited from QgsRasterRenderer
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...

Detailed Description

Renderer for multiband images with the color components.

Definition at line 32 of file qgsmultibandcolorrenderer.h.

Constructor & Destructor Documentation

◆ QgsMultiBandColorRenderer() [1/2]

QgsMultiBandColorRenderer::QgsMultiBandColorRenderer	(	QgsRasterInterface *	input,
		int	redBand,
		int	greenBand,
		int	blueBand,
		QgsContrastEnhancement *	redEnhancement = `nullptr`,
		QgsContrastEnhancement *	greenEnhancement = `nullptr`,
		QgsContrastEnhancement *	blueEnhancement = `nullptr`
	)

Definition at line 27 of file qgsmultibandcolorrenderer.cpp.

◆ ~QgsMultiBandColorRenderer()

QgsMultiBandColorRenderer::~QgsMultiBandColorRenderer ( )

override

Definition at line 41 of file qgsmultibandcolorrenderer.cpp.

◆ QgsMultiBandColorRenderer() [2/2]

QgsMultiBandColorRenderer::QgsMultiBandColorRenderer ( const QgsMultiBandColorRenderer & )

delete

QgsMultiBandColorRenderer cannot be copied. Use clone() instead.

Member Function Documentation

◆ block()

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

overridevirtual

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.