qgsrasteranalysisutils.h

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/***************************************************************************
  qgsrasteranalysisutils.h
  ---------------------
  Date                 : June 2018
  Copyright            : (C) 2018 by Nyall Dawson
  Email                : nyall dot dawson at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSRASTERANALYSISUTILS_H
#define QGSRASTERANALYSISUTILS_H
 
#include "qgis_analysis.h"
#include "qgis.h"
 
#include <functional>
#include <memory>
#include <vector>
 
#define SIP_NO_FILE
 
 
class QgsRasterInterface;
class QgsGeometry;
class QgsRectangle;
class QgsProcessingParameterDefinition;
class QgsRasterProjector;
class QgsRasterDataProvider;
class QgsFeedback;
class QgsRasterBlock;
 
namespace QgsRasterAnalysisUtils
{
 
  void cellInfoForBBox( const QgsRectangle &rasterBBox, const QgsRectangle &featureBBox, double cellSizeX, double cellSizeY, int &nCellsX, int &nCellsY,
                        int rasterWidth, int rasterHeight,
                        QgsRectangle &rasterBlockExtent );
 
  void statisticsFromMiddlePointTest( QgsRasterInterface *rasterInterface, int rasterBand, const QgsGeometry &poly, int nCellsX, int nCellsY,
                                      double cellSizeX, double cellSizeY, const QgsRectangle &rasterBBox, const std::function<void( double )> &addValue, bool skipNodata = true );
 
  void statisticsFromPreciseIntersection( QgsRasterInterface *rasterInterface, int rasterBand, const QgsGeometry &poly, int nCellsX, int nCellsY,
                                          double cellSizeX, double cellSizeY, const QgsRectangle &rasterBBox, const std::function<void( double, double )> &addValue, bool skipNodata = true );
 
  bool validPixel( double value );
 
  void mapToPixel( const double x, const double y, const QgsRectangle bounds, const double unitsPerPixelX, const double unitsPerPixelY, int &px, int &py );
 
  void pixelToMap( const int px, const int py, const QgsRectangle bounds, const double unitsPerPixelX, const double unitsPerPixelY, double &x, double &y );
 
  std::unique_ptr< QgsProcessingParameterDefinition > createRasterTypeParameter( const QString &name,
      const QString &description,
      Qgis::DataType defaultType = Qgis::Float32 );
 
  Qgis::DataType rasterTypeChoiceToDataType( int choice );
 
  struct RasterLogicInput
  {
    std::unique_ptr< QgsRasterInterface > sourceDataProvider;
    std::unique_ptr< QgsRasterProjector> projector;
    QgsRasterInterface *interface = nullptr;
    bool hasNoDataValue = false;
    std::vector< int > bands { 1 };
  };
 
  ANALYSIS_EXPORT void applyRasterLogicOperator( const std::vector< QgsRasterAnalysisUtils::RasterLogicInput > &inputs, QgsRasterDataProvider *destinationRaster, double outputNoDataValue, const bool treatNoDataAsFalse,
      int width, int height, const QgsRectangle &extent, QgsFeedback *feedback,
      std::function<void( const std::vector< std::unique_ptr< QgsRasterBlock > > &, bool &, bool &, int, int, bool )> &applyLogicFunc,
      qgssize &noDataCount, qgssize &trueCount, qgssize &falseCount );
 
  std::vector<double> getCellValuesFromBlockStack( const std::vector< std::unique_ptr< QgsRasterBlock > > &inputBlocks, int &row, int &col, bool &noDataInStack );
 
  enum CellValueStatisticMethods
  {
    Sum,
    Count,
    Mean,
    Median,
    StandardDeviation,
    Variance,
    Minimum,
    Maximum,
    Minority,
    Majority,
    Range,
    Variety
  };
 
  double meanFromCellValues( std::vector<double> cellValues, int stackSize );
 
  double medianFromCellValues( std::vector<double> cellValues, int stackSize );
 
  double stddevFromCellValues( std::vector<double> cellValues, int stackSize );
 
  double varianceFromCellValues( std::vector<double> cellValues, int stackSize );
 
  double maximumFromCellValues( std::vector<double> cellValues );
 
  double minimumFromCellValues( std::vector<double> cellValues );
 
  double majorityFromCellValues( std::vector<double> cellValues, const double noDataValue, int stackSize );
 
  double minorityFromCellValues( std::vector<double> cellValues, const double noDataValue, int stackSize );
 
  double rangeFromCellValues( std::vector<double> cellValues );
 
  double varietyFromCellValues( std::vector<double> cellValues );
 
}
 
 
 
#endif // QGSRASTERANALYSISUTILS_H