qgsalgorithmvectorize.h

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/***************************************************************************
                         qgsalgorithmvectorize.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 QGSALGORITHMVECTORIZE_H
#define QGSALGORITHMVECTORIZE_H
 
#define SIP_NO_FILE
 
#include "qgis_sip.h"
#include "qgsprocessingalgorithm.h"
#include "qgsreclassifyutils.h"
 
 
class QgsVectorizeAlgorithmBase : public QgsProcessingAlgorithm
{
  public:
 
    QString group() const final;
    QString groupId() const final;
    void initAlgorithm( const QVariantMap &configuration = QVariantMap() ) final;
 
  protected:
 
    bool prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) final;
 
    QVariantMap processAlgorithm( const QVariantMap &parameters,
                                  QgsProcessingContext &context, QgsProcessingFeedback *feedback ) final;
 
    std::unique_ptr< QgsRasterInterface > mInterface;
 
    Qgis::DataType mDataType = Qgis::DataType::Float32;
    double mNoDataValue = -9999;
    int mBand = 1;
    QgsRectangle mExtent;
    QgsCoordinateReferenceSystem mCrs;
    double mRasterUnitsPerPixelX = 0;
    double mRasterUnitsPerPixelY = 0;
    int mNbCellsXProvider = 0;
    int mNbCellsYProvider = 0;
    QgsReclassifyUtils::RasterClass::BoundsType mBoundsType = QgsReclassifyUtils::RasterClass::IncludeMax;
    bool mUseNoDataForMissingValues = false;
 
  private:
 
    virtual QString outputName() const = 0;
    virtual QgsProcessing::SourceType outputType() const = 0;
    virtual QgsWkbTypes::Type sinkType() const = 0;
    virtual QgsGeometry createGeometryForPixel( double centerX, double centerY, double pixelWidthX, double pixelWidthY ) const = 0;
};
 
class QgsRasterPixelsToPolygonsAlgorithm : public QgsVectorizeAlgorithmBase
{
  public:
 
    QgsRasterPixelsToPolygonsAlgorithm() = default;
    QString name() const override;
    QString displayName() const override;
    QStringList tags() const override;
    QString shortHelpString() const override;
    QString shortDescription() const override;
    QgsRasterPixelsToPolygonsAlgorithm *createInstance() const override SIP_FACTORY;
 
  private:
 
    QString outputName() const override;
    QgsProcessing::SourceType outputType() const override;
    QgsWkbTypes::Type sinkType() const override;
    QgsGeometry createGeometryForPixel( double centerX, double centerY, double pixelWidthX, double pixelWidthY ) const override;
 
};
 
class QgsRasterPixelsToPointsAlgorithm : public QgsVectorizeAlgorithmBase
{
  public:
 
    QgsRasterPixelsToPointsAlgorithm() = default;
    QString name() const override;
    QString displayName() const override;
    QStringList tags() const override;
    QString shortHelpString() const override;
    QString shortDescription() const override;
    QgsRasterPixelsToPointsAlgorithm *createInstance() const override SIP_FACTORY;
 
  private:
 
    QString outputName() const override;
    QgsProcessing::SourceType outputType() const override;
    QgsWkbTypes::Type sinkType() const override;
    QgsGeometry createGeometryForPixel( double centerX, double centerY, double pixelWidthX, double pixelWidthY ) const override;
 
};
 
 
#endif // QGSALGORITHMVECTORIZE_H