mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-28 00:17:30 -05:00
c49b5b777f
Rationale: - there was a lot of large objects passed by value, so potentially there's a speed bump from this - even for implicitly shared classes like QString/QList there's still a (small) cost for copying the objects when there's no reason to - it's the right thing to do!
54 lines
1.6 KiB
Plaintext
54 lines
1.6 KiB
Plaintext
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class QgsRasterRenderer : QgsRasterInterface
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{
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%TypeHeaderCode
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#include "qgsrasterrenderer.h"
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%End
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public:
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QgsRasterRenderer( QgsRasterInterface* input = 0, const QString& type = "" );
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virtual ~QgsRasterRenderer();
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virtual QgsRasterInterface * clone() const = 0 /Factory/;
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virtual int bandCount() const;
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virtual QGis::DataType dataType( int bandNo ) const;
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virtual QString type() const;
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virtual bool setInput( QgsRasterInterface* input );
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virtual QgsRasterBlock *block( int bandNo, const QgsRectangle &extent, int width, int height ) = 0 / Factory /;
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bool usesTransparency() const;
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void setOpacity( double opacity );
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double opacity() const;
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void setRasterTransparency( QgsRasterTransparency* t /Transfer/);
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const QgsRasterTransparency* rasterTransparency() const;
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void setAlphaBand( int band );
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int alphaBand() const;
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/** Get symbology items if provided by renderer*/
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virtual void legendSymbologyItems( QList< QPair< QString, QColor > >& symbolItems ) const;
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/** Sets base class members from xml. Usually called from create() methods of subclasses*/
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void readXML( const QDomElement& rendererElem );
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/** Returns a list of band numbers used by the renderer*/
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virtual QList<int> usesBands() const;
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static QString minMaxOriginName( int theOrigin );
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static QString minMaxOriginLabel( int theOrigin );
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static int minMaxOriginFromName( const QString& theName );
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protected:
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/** Write upper class info into rasterrenderer element (called by writeXML method of subclasses)*/
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void _writeXML( QDomDocument& doc, QDomElement& rasterRendererElem ) const;
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};
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