QGIS API Documentation  2.99.0-Master (ae4d26a)
Classes | Public Member Functions | List of all members
QgsRasterNuller Class Reference

Raster pipe that deals with null values. More...

#include <qgsrasternuller.h>

Inheritance diagram for QgsRasterNuller:
Inheritance graph
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Classes

struct  NoData
 

Public Member Functions

 QgsRasterNuller (QgsRasterInterface *input=nullptr)
 
int bandCount () const override
 Get number of bands. More...
 
QgsRasterBlockblock (int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback=nullptr) override
 Read block of data using given extent and size. More...
 
QgsRasterNullerclone () 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...
 
QgsRasterRangeList noData (int bandNo) const
 
void setNoData (int bandNo, const QgsRasterRangeList &noData)
 
void setOutputNoDataValue (int bandNo, double noData)
 Set output no data value. More...
 
- 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 QgsRasterInterfaceinput () const
 Current input. More...
 
virtual bool on () const
 Is on/off. More...
 
virtual void readXml (const QDomElement &filterElem)
 Sets base class members from xml. Usually called from create() methods of subclasses. More...
 
virtual bool setInput (QgsRasterInterface *input)
 Set input. 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 QgsRasterInterfacesourceInput () const
 Get source / raw input, the first in pipe, usually provider. More...
 
virtual QgsRasterInterfacesourceInput ()
 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
 

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 &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 QgsRasterInterface
QList< QgsRasterHistogrammHistograms
 List of cached histograms, all bands mixed. More...
 
QgsRasterInterfacemInput = nullptr
 
bool mOn = true
 
QList< QgsRasterBandStatsmStatistics
 List of cached statistics, all bands mixed. More...
 

Detailed Description

Raster pipe that deals with null values.

Definition at line 32 of file qgsrasternuller.h.

Constructor & Destructor Documentation

◆ QgsRasterNuller()

QgsRasterNuller::QgsRasterNuller ( QgsRasterInterface input = nullptr)

Definition at line 21 of file qgsrasternuller.cpp.

Member Function Documentation

◆ bandCount()

int QgsRasterNuller::bandCount ( ) const
overridevirtual

Get number of bands.

Implements QgsRasterInterface.

Definition at line 56 of file qgsrasternuller.cpp.

◆ block()

QgsRasterBlock * QgsRasterNuller::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
bandNoband number
extentextent of block
widthpixel width of block
heightpixel height of block
feedbackoptional raster feedback object for cancelation/preview. Added in QGIS 3.0.

Implements QgsRasterInterface.

Definition at line 68 of file qgsrasternuller.cpp.

◆ clone()

QgsRasterNuller * QgsRasterNuller::clone ( ) const
overridevirtual

Clone itself, create deep copy.

Implements QgsRasterInterface.

Definition at line 26 of file qgsrasternuller.cpp.

◆ dataType()

Qgis::DataType QgsRasterNuller::dataType ( int  bandNo) const
overridevirtual

Returns data type for the band specified by number.

Implements QgsRasterInterface.

Definition at line 62 of file qgsrasternuller.cpp.

◆ noData()

QgsRasterRangeList QgsRasterNuller::noData ( int  bandNo) const
inline

Definition at line 53 of file qgsrasternuller.h.

◆ setNoData()

void QgsRasterNuller::setNoData ( int  bandNo,
const QgsRasterRangeList noData 
)

Definition at line 47 of file qgsrasternuller.cpp.

◆ setOutputNoDataValue()

void QgsRasterNuller::setOutputNoDataValue ( int  bandNo,
double  noData 
)

Set output no data value.

Definition at line 36 of file qgsrasternuller.cpp.


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