qgsreclassifyutils.h

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/***************************************************************************
                         qgsreclassifyutils.h
                         ---------------------
    begin                : 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 QGSRECLASSIFYUTILS
#define QGSRECLASSIFYUTILS

#define SIP_NO_FILE

#include "qgis_sip.h"
#include "qgis_analysis.h"
#include "qgsrasterrange.h"
#include <QVector>

class QgsRasterInterface;
class QgsProcessingFeedback;
class QgsRasterDataProvider;
class QgsRectangle;


class ANALYSIS_EXPORT QgsReclassifyUtils
{

  public:

    class RasterClass : public QgsRasterRange
    {
      public:

        RasterClass() = default;

        RasterClass( double minValue, double maxValue, QgsRasterRange::BoundsType type, double value )
          : QgsRasterRange( minValue, maxValue, type )
          , value( value )
        {}

        double value = 0;
    };

    static void reportClasses( const QVector< RasterClass > &classes, QgsProcessingFeedback *feedback );

    static void checkForOverlaps( const QVector< RasterClass > &classes, QgsProcessingFeedback *feedback );

    static void reclassify( const QVector< RasterClass > &classes,
                            QgsRasterInterface *sourceRaster,
                            int band,
                            const QgsRectangle &extent,
                            int sourceWidthPixels,
                            int sourceHeightPixels,
                            QgsRasterDataProvider *destinationRaster,
                            double destNoDataValue, bool useNoDataForMissingValues,
                            QgsProcessingFeedback *feedback = nullptr );

    static double reclassifyValue( const QVector< RasterClass > &classes, double input, bool &reclassified )
    {
      reclassified = false;
      for ( const QgsReclassifyUtils::RasterClass &c : classes )
      {
        if ( c.contains( input ) )
        {
          reclassified = true;
          return c.value;
        }
      }
      return input;
    }

};

Q_DECLARE_TYPEINFO( QgsReclassifyUtils::RasterClass, Q_MOVABLE_TYPE );



#endif // QGSRECLASSIFYUTILS