qgsalignraster.h

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/***************************************************************************
  qgsalignraster.h
  --------------------------------------
  Date                 : June 2015
  Copyright            : (C) 2015 by Martin Dobias
  Email                : wonder dot sk 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 QGSALIGNRASTER_H
#define QGSALIGNRASTER_H
 
#include <gdal_version.h>
 
#include "qgis_analysis.h"
#include "qgis_sip.h"
#include "qgsalignrasterdata.h"
#include "qgsogrutils.h"
 
#include <QList>
#include <QPointF>
#include <QSizeF>
#include <QString>
 
class QgsRectangle;
 
typedef void *GDALDatasetH SIP_SKIP;
 

class ANALYSIS_EXPORT QgsAlignRaster
{
    //SIP_TYPEHEADER_INCLUDE( "gdal_version.h" );
 
 
  public:
    QgsAlignRaster();

    struct ANALYSIS_EXPORT RasterInfo
    {
      public:
        RasterInfo( const QString &layerpath );
 
        RasterInfo( const RasterInfo &rh ) = delete;
        RasterInfo &operator=( const RasterInfo &rh ) = delete;

        bool isValid() const { return nullptr != mDataset; }

        QString crs() const { return mCrsWkt; }
        QSize rasterSize() const { return QSize( mXSize, mYSize ); }
        int bandCount() const { return mBandCnt; }
        QSizeF cellSize() const;
        QPointF gridOffset() const;
        QgsRectangle extent() const;
        QPointF origin() const;

        void dump() const;

        double identify( double mx, double my );
 
      protected:
        gdal::dataset_unique_ptr mDataset;
        QString mCrsWkt;
        double mGeoTransform[6];
        int mXSize = 0;
        int mYSize = 0;
        int mBandCnt = 0;
 
      private:
#ifdef SIP_RUN
        RasterInfo( const QgsAlignRaster::RasterInfo &rh );
#endif
 
        friend class QgsAlignRaster;
    };
 
    typedef Qgis::GdalResampleAlgorithm ResampleAlg;
    typedef QgsAlignRasterData::RasterItem Item;
    typedef QList<QgsAlignRasterData::RasterItem> List;

    struct ProgressHandler
    {
        virtual bool progress( double complete ) = 0;
 
        virtual ~ProgressHandler() = default;
    };

    void setProgressHandler( ProgressHandler *progressHandler ) { mProgressHandler = progressHandler; }
    ProgressHandler *progressHandler() const { return mProgressHandler; }

    void setRasters( const List &list ) { mRasters = list; }
    List rasters() const { return mRasters; }
 
    void setGridOffset( QPointF offset )
    {
      mGridOffsetX = offset.x();
      mGridOffsetY = offset.y();
    }
    QPointF gridOffset() const { return QPointF( mGridOffsetX, mGridOffsetY ); }

    void setCellSize( double x, double y ) { setCellSize( QSizeF( x, y ) ); }
    void setCellSize( QSizeF size )
    {
      mCellSizeX = size.width();
      mCellSizeY = size.height();
    }

    QSizeF cellSize() const { return QSizeF( mCellSizeX, mCellSizeY ); }

    void setDestinationCrs( const QString &crsWkt ) { mCrsWkt = crsWkt; }
    QString destinationCrs() const { return mCrsWkt; }

    void setClipExtent( double xmin, double ymin, double xmax, double ymax );

    void setClipExtent( const QgsRectangle &extent );

    QgsRectangle clipExtent() const;

    bool setParametersFromRaster( const RasterInfo &rasterInfo, const QString &customCRSWkt = QString(), QSizeF customCellSize = QSizeF(), QPointF customGridOffset = QPointF( -1, -1 ) );

    bool setParametersFromRaster( const QString &filename, const QString &customCRSWkt = QString(), QSizeF customCellSize = QSizeF(), QPointF customGridOffset = QPointF( -1, -1 ) );

    bool checkInputParameters();

    QSize alignedRasterSize() const;

    QgsRectangle alignedRasterExtent() const;

    bool run();

    QString errorMessage() const { return mErrorMessage; }

    void dump() const;

    int suggestedReferenceLayer() const;
 
  protected:
    bool createAndWarp( const Item &raster );

    static bool suggestedWarpOutput( const RasterInfo &info, const QString &destWkt, QSizeF *cellSize = nullptr, QPointF *gridOffset = nullptr, QgsRectangle *rect = nullptr );
 
  protected:
    // set by the client

    ProgressHandler *mProgressHandler = nullptr;

    QString mErrorMessage;

    List mRasters;

    QString mCrsWkt;
    double mCellSizeX, mCellSizeY;
    double mGridOffsetX, mGridOffsetY;

    double mClipExtent[4];
 
    // derived data from other members

    double mGeoTransform[6];
    int mXSize;

    int mYSize;
};
 
#endif // QGSALIGNRASTER_H