qgsalgorithmrasterzonalstats.h

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/***************************************************************************
                         qgsalgorithmrasterzonalstats.h
                         ---------------------
    begin                : December 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 QGSALGORITHMRASTERZONALSTATS_H
#define QGSALGORITHMRASTERZONALSTATS_H
 
#define SIP_NO_FILE
 
#include "qgis_sip.h"
#include "qgsprocessingalgorithm.h"
#include "qgsrasterprojector.h"
 
 
class QgsRasterLayerZonalStatsAlgorithm : public QgsProcessingAlgorithm
{
  public:
    QgsRasterLayerZonalStatsAlgorithm() = default;
 
    void initAlgorithm( const QVariantMap &configuration = QVariantMap() ) override;
    QString name() const override;
    QString displayName() const override;
    QStringList tags() const override;
    QString group() const override;
    QString groupId() const override;
    QString shortHelpString() const override;
    QString shortDescription() const override;
    QgsRasterLayerZonalStatsAlgorithm *createInstance() const override SIP_FACTORY;
 
  protected:
    bool prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
    QVariantMap processAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
 
  private:
    enum RefLayer
    {
      Source,
      Zones
    };
 
    std::unique_ptr<QgsRasterInterface> mSourceDataProvider;
    std::unique_ptr<QgsRasterInterface> mZonesDataProvider;
    std::unique_ptr<QgsRasterProjector> mProjector;
    QgsRasterInterface *mSourceInterface = nullptr;
    QgsRasterInterface *mZonesInterface = nullptr;
    bool mHasNoDataValue = false;
    bool mZonesHasNoDataValue = false;
    int mBand = 1;
    int mZonesBand = 1;
    int mLayerWidth = 0;
    int mLayerHeight = 0;
    QgsRectangle mExtent;
    QgsCoordinateReferenceSystem mCrs;
    double mRasterUnitsPerPixelX = 0;
    double mRasterUnitsPerPixelY = 0;
    RefLayer mRefLayer = Source;
};
 
 
#endif // QGSALGORITHMRASTERZONALSTATS_H