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559d7bb943
...rather than reading input layers directly through GDAL. Benefits include more robust handling of nodata/data type conversions, less code duplication, also being able to take advantage of features in QGIS raster code like handling gain/offset in rasters. (fix #12450) Also, add a choice of output projection to the raster calculator. Previously the output CRS would be taken from the first raster, with no guarantees that the output extent matched the output CRS. This resulted in empty/misplaced rasters. (fix #3649)
54 lines
2.1 KiB
Plaintext
54 lines
2.1 KiB
Plaintext
struct QgsRasterCalculatorEntry
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{
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%TypeHeaderCode
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#include <qgsrastercalculator.h>
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%End
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QString ref; //name
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QgsRasterLayer* raster; //pointer to rasterlayer
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int bandNumber; //raster band number
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};
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/**Raster calculator class*/
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class QgsRasterCalculator
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{
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%TypeHeaderCode
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#include <qgsrastercalculator.h>
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%End
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public:
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/** QgsRasterCalculator constructor.
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* @param formulaString formula for raster calculation
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* @param outputFile output file path
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* @param outputFormat output file format
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* @param outputExtent output extent. CRS for output is taken from first entry in rasterEntries.
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* @param nOutputColumns number of columns in output raster
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* @param nOutputRows number of rows in output raster
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* @param rasterEntries list of referenced raster layers
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*/
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QgsRasterCalculator( const QString& formulaString, const QString& outputFile, const QString& outputFormat,
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const QgsRectangle& outputExtent, int nOutputColumns, int nOutputRows, const QVector<QgsRasterCalculatorEntry>& rasterEntries );
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/** QgsRasterCalculator constructor.
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* @param formulaString formula for raster calculation
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* @param outputFile output file path
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* @param outputFormat output file format
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* @param outputExtent output extent, CRS is specifed by outputCrs parameter
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* @param outputCrs destination CRS for output raster
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* @param nOutputColumns number of columns in output raster
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* @param nOutputRows number of rows in output raster
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* @param rasterEntries list of referenced raster layers
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* @note added in QGIS 2.10
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*/
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QgsRasterCalculator( const QString& formulaString, const QString& outputFile, const QString& outputFormat,
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const QgsRectangle& outputExtent, const QgsCoordinateReferenceSystem& outputCrs, int nOutputColumns, int nOutputRows, const QVector<QgsRasterCalculatorEntry>& rasterEntries );
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~QgsRasterCalculator();
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/**Starts the calculation and writes new raster
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@param p progress bar (or 0 if called from non-gui code)
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@return 0 in case of success*/
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int processCalculation( QProgressDialog* p = 0 );
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};
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