QGIS API Documentation  3.6.0-Noosa (5873452)
Public Member Functions | List of all members
QgsBrightnessContrastFilter Class Reference

Brightness/contrast filter pipe for rasters. More...

#include <qgsbrightnesscontrastfilter.h>

Inheritance diagram for QgsBrightnessContrastFilter:
Inheritance graph
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Public Member Functions

 QgsBrightnessContrastFilter (QgsRasterInterface *input=nullptr)
 
int bandCount () const override
 Gets 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...
 
int brightness () const
 
QgsBrightnessContrastFilterclone () const override
 Clone itself, create deep copy. More...
 
int contrast () const
 
Qgis::DataType dataType (int bandNo) const override
 Returns data type for the band specified by number. More...
 
void readXml (const QDomElement &filterElem) override
 Sets base class members from xml. Usually called from create() methods of subclasses. More...
 
void setBrightness (int brightness)
 
void setContrast (int contrast)
 
bool setInput (QgsRasterInterface *input) override
 Set input. More...
 
void writeXml (QDomDocument &doc, QDomElement &parentElem) const override
 Write base class members to xml. 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)
 Returns the 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
 Gets 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)
 Returns a band histogram. More...
 
virtual QgsRasterInterfaceinput () const
 Current input. More...
 
virtual bool on () const
 Returns whether the interface is on or off. More...
 
virtual void setOn (bool on)
 Sets whether the interface is on or 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
 Gets source / raw input, the first in pipe, usually provider. More...
 
virtual QgsRasterInterfacesourceInput ()
 Gets source / raw input, the first in pipe, usually provider. More...
 
virtual int xBlockSize () const
 Gets block size. More...
 
virtual int xSize () const
 Gets 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

Brightness/contrast filter pipe for rasters.

Definition at line 31 of file qgsbrightnesscontrastfilter.h.

Constructor & Destructor Documentation

◆ QgsBrightnessContrastFilter()

QgsBrightnessContrastFilter::QgsBrightnessContrastFilter ( QgsRasterInterface input = nullptr)

Definition at line 24 of file qgsbrightnesscontrastfilter.cpp.

Member Function Documentation

◆ bandCount()

int QgsBrightnessContrastFilter::bandCount ( ) const
overridevirtual

Gets number of bands.

Implements QgsRasterInterface.

Definition at line 38 of file qgsbrightnesscontrastfilter.cpp.

◆ block()

QgsRasterBlock * QgsBrightnessContrastFilter::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 105 of file qgsbrightnesscontrastfilter.cpp.

◆ brightness()

int QgsBrightnessContrastFilter::brightness ( ) const
inline

Definition at line 47 of file qgsbrightnesscontrastfilter.h.

◆ clone()

QgsBrightnessContrastFilter * QgsBrightnessContrastFilter::clone ( ) const
overridevirtual

Clone itself, create deep copy.

Implements QgsRasterInterface.

Definition at line 29 of file qgsbrightnesscontrastfilter.cpp.

◆ contrast()

int QgsBrightnessContrastFilter::contrast ( ) const
inline

Definition at line 50 of file qgsbrightnesscontrastfilter.h.

◆ dataType()

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

Returns data type for the band specified by number.

Implements QgsRasterInterface.

Definition at line 53 of file qgsbrightnesscontrastfilter.cpp.

◆ readXml()

void QgsBrightnessContrastFilter::readXml ( const QDomElement &  filterElem)
overridevirtual

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

Reimplemented from QgsRasterInterface.

Definition at line 202 of file qgsbrightnesscontrastfilter.cpp.

◆ setBrightness()

void QgsBrightnessContrastFilter::setBrightness ( int  brightness)
inline

Definition at line 46 of file qgsbrightnesscontrastfilter.h.

◆ setContrast()

void QgsBrightnessContrastFilter::setContrast ( int  contrast)
inline

Definition at line 49 of file qgsbrightnesscontrastfilter.h.

◆ setInput()

bool QgsBrightnessContrastFilter::setInput ( QgsRasterInterface input)
overridevirtual

Set input.

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

Reimplemented from QgsRasterInterface.

Definition at line 68 of file qgsbrightnesscontrastfilter.cpp.

◆ writeXml()

void QgsBrightnessContrastFilter::writeXml ( QDomDocument &  doc,
QDomElement &  parentElem 
) const
overridevirtual

Write base class members to xml.

Reimplemented from QgsRasterInterface.

Definition at line 188 of file qgsbrightnesscontrastfilter.cpp.


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