Resample filter pipe for rasters. More...

#include <qgsrasterresamplefilter.h>

Inheritance diagram for QgsRasterResampleFilter:

Public Member Functions
	QgsRasterResampleFilter (QgsRasterInterface *input=nullptr)

	~QgsRasterResampleFilter ()

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

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

QgsRasterBlock *	block2 (int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback=nullptr) override
	Read block of data using given extent and size. More...

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

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

double	maxOversampling () const

void	readXML (const QDomElement &filterElem) override
	Sets base class members from xml. More...

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

void	setMaxOversampling (double os)

void	setZoomedInResampler (QgsRasterResampler *r)
	Set resampler for zoomed in scales. More...

void	setZoomedOutResampler (QgsRasterResampler *r)
	Set resampler for zoomed out scales. More...

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

const QgsRasterResampler *	zoomedInResampler () const

const QgsRasterResampler *	zoomedOutResampler () const

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

virtual	~QgsRasterInterface ()

virtual QgsRasterBandStats	bandStatistics (int theBandNo, int theStats=QgsRasterBandStats::All, const QgsRectangle &theExtent=QgsRectangle(), int theSampleSize=0)
	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 theBandNo, double theLowerCount, double theUpperCount, double &theLowerValue, double &theUpperValue, const QgsRectangle &theExtent=QgsRectangle(), int theSampleSize=0)
	Find values for cumulative pixel count cut. More...

int	dataTypeSize (int bandNo)

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

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

virtual bool	hasHistogram (int theBandNo, int theBinCount, double theMinimum=std::numeric_limits< double >::quiet_NaN(), double theMaximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &theExtent=QgsRectangle(), int theSampleSize=0, bool theIncludeOutOfRange=false)
	Returns true if histogram is available (cached, already calculated), the parameters are the same as in histogram() More...

virtual bool	hasStatistics (int theBandNo, int theStats=QgsRasterBandStats::All, const QgsRectangle &theExtent=QgsRectangle(), int theSampleSize=0)
	Returns true if histogram is available (cached, already calculated). More...

virtual QgsRasterHistogram	histogram (int theBandNo, int theBinCount=0, double theMinimum=std::numeric_limits< double >::quiet_NaN(), double theMaximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &theExtent=QgsRectangle(), int theSampleSize=0, bool theIncludeOutOfRange=false)
	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	srcDataType (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 *	srcInput () const
	Get source / raw input, the first in pipe, usually provider. More...

virtual QgsRasterInterface *	srcInput ()

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

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

virtual int	yBlockSize () const

virtual int	ySize () const

Protected Attributes
double	mMaxOversampling
	Maximum boundary for oversampling (to avoid too much data traffic). More...

QgsRasterResampler *	mZoomedInResampler
	Resampler used if screen resolution is higher than raster resolution (zoomed in). More...

QgsRasterResampler *	mZoomedOutResampler
	Resampler used if raster resolution is higher than raster resolution (zoomed out). More...

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

QgsRasterInterface *	mInput

bool	mOn

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...

Protected Member Functions inherited from QgsRasterInterface
void	initHistogram (QgsRasterHistogram &theHistogram, int theBandNo, int theBinCount=0, double theMinimum=std::numeric_limits< double >::quiet_NaN(), double theMaximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &theExtent=QgsRectangle(), int theSampleSize=0, bool theIncludeOutOfRange=false)
	Fill in histogram defaults if not specified. More...

void	initStatistics (QgsRasterBandStats &theStatistics, int theBandNo, int theStats=QgsRasterBandStats::All, const QgsRectangle &theExtent=QgsRectangle(), int theBinCount=0)
	Fill in statistics defaults if not specified. More...

Detailed Description

Resample filter pipe for rasters.

Definition at line 31 of file qgsrasterresamplefilter.h.

Constructor & Destructor Documentation

◆ QgsRasterResampleFilter()

QgsRasterResampleFilter::QgsRasterResampleFilter ( QgsRasterInterface * input = nullptr )

Definition at line 35 of file qgsrasterresamplefilter.cpp.

◆ ~QgsRasterResampleFilter()

QgsRasterResampleFilter::~QgsRasterResampleFilter ( )

Definition at line 43 of file qgsrasterresamplefilter.cpp.

Member Function Documentation

◆ bandCount()

int QgsRasterResampleFilter::bandCount ( ) const

overridevirtual

Get number of bands.

Implements QgsRasterInterface.

Definition at line 65 of file qgsrasterresamplefilter.cpp.

◆ block()

QgsRasterBlock * QgsRasterResampleFilter::block	(	int	bandNo,
		const QgsRectangle &	extent,
		int	width,
		int	height
	)

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

Implements QgsRasterInterface.

Definition at line 132 of file qgsrasterresamplefilter.cpp.

◆ block2()

QgsRasterBlock * QgsRasterResampleFilter::block2	(	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 cancellation/preview

Note: This is extended version of block() method. Default implementation falls back to calling block().; Added in QGIS 2.18

Reimplemented from QgsRasterInterface.

Definition at line 137 of file qgsrasterresamplefilter.cpp.

◆ clone()

QgsRasterResampleFilter * QgsRasterResampleFilter::clone ( ) const

overridevirtual

Clone itself, create deep copy.

Implements QgsRasterInterface.

Definition at line 49 of file qgsrasterresamplefilter.cpp.

◆ dataType()

QGis::DataType QgsRasterResampleFilter::dataType ( int bandNo ) const

overridevirtual

Returns data type for the band specified by number.

Implements QgsRasterInterface.

Definition at line 74 of file qgsrasterresamplefilter.cpp.

◆ maxOversampling()

double QgsRasterResampleFilter::maxOversampling ( ) const

inline

Definition at line 57 of file qgsrasterresamplefilter.h.

◆ readXML()

void QgsRasterResampleFilter::readXML ( const QDomElement & filterElem )

overridevirtual

Sets base class members from xml.

Usually called from create() methods of subclasses

Reimplemented from QgsRasterInterface.

Definition at line 252 of file qgsrasterresamplefilter.cpp.

◆ setInput()

bool QgsRasterResampleFilter::setInput ( QgsRasterInterface * input )

overridevirtual

Set input.

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

Reimplemented from QgsRasterInterface.

Definition at line 83 of file qgsrasterresamplefilter.cpp.

◆ setMaxOversampling()

void QgsRasterResampleFilter::setMaxOversampling ( double os )

inline

Definition at line 56 of file qgsrasterresamplefilter.h.

◆ setZoomedInResampler()

void QgsRasterResampleFilter::setZoomedInResampler ( QgsRasterResampler * r )

Set resampler for zoomed in scales.

Takes ownership of the object

Definition at line 120 of file qgsrasterresamplefilter.cpp.

◆ setZoomedOutResampler()

void QgsRasterResampleFilter::setZoomedOutResampler ( QgsRasterResampler * r )

Set resampler for zoomed out scales.

Takes ownership of the object

Definition at line 126 of file qgsrasterresamplefilter.cpp.

◆ writeXML()

void QgsRasterResampleFilter::writeXML	(	QDomDocument &	doc,
		QDomElement &	parentElem
	)		const

overridevirtual

Write base class members to xml.

Reimplemented from QgsRasterInterface.

Definition at line 231 of file qgsrasterresamplefilter.cpp.

◆ zoomedInResampler()

const QgsRasterResampler* QgsRasterResampleFilter::zoomedInResampler ( ) const

inline

Definition at line 50 of file qgsrasterresamplefilter.h.

◆ zoomedOutResampler()

const QgsRasterResampler* QgsRasterResampleFilter::zoomedOutResampler ( ) const

inline

Definition at line 54 of file qgsrasterresamplefilter.h.

Member Data Documentation

◆ mMaxOversampling

double QgsRasterResampleFilter::mMaxOversampling

protected

Maximum boundary for oversampling (to avoid too much data traffic).

Default: 2.0

Definition at line 71 of file qgsrasterresamplefilter.h.

◆ mZoomedInResampler

QgsRasterResampler* QgsRasterResampleFilter::mZoomedInResampler

protected

Resampler used if screen resolution is higher than raster resolution (zoomed in).

0 means no resampling (nearest neighbour)

Definition at line 66 of file qgsrasterresamplefilter.h.

◆ mZoomedOutResampler

QgsRasterResampler* QgsRasterResampleFilter::mZoomedOutResampler

protected

Resampler used if raster resolution is higher than raster resolution (zoomed out).

0 mean no resampling (nearest neighbour)

Definition at line 68 of file qgsrasterresamplefilter.h.

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

/tmp/buildd/qgis-2.18.21+99unstable/src/core/raster/qgsrasterresamplefilter.h
/tmp/buildd/qgis-2.18.21+99unstable/src/core/raster/qgsrasterresamplefilter.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsRasterResampleFilter()

◆ ~QgsRasterResampleFilter()

Member Function Documentation

◆ bandCount()

◆ block()

◆ block2()

◆ clone()

◆ dataType()

◆ maxOversampling()

◆ readXML()

◆ setInput()

◆ setMaxOversampling()

◆ setZoomedInResampler()

◆ setZoomedOutResampler()

◆ writeXML()

◆ zoomedInResampler()

◆ zoomedOutResampler()

Member Data Documentation

◆ mMaxOversampling

◆ mZoomedInResampler

◆ mZoomedOutResampler