libresampling2D.h

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// SPDX-License-Identifier: LGPL-3.0-or-later
/***********************************************************************************/
/*  Copyright 2011 WSL Institute for Snow and Avalanche Research    SLF-DAVOS      */
/***********************************************************************************/
/* This file is part of MeteoIO.
    MeteoIO is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    MeteoIO is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
    along with MeteoIO.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBRESAMPLING2D_H
#define LIBRESAMPLING2D_H
 
#include <meteoio/dataClasses/Grid2DObject.h> //this contains Array2D
 
#include <iostream>
#include <string>
 
namespace mio {
 
class LibResampling2D {
        public:
                //Available algorithms
                static const Grid2DObject Nearest(const Grid2DObject &i_grid, const double &factor);
                static const Grid2DObject Bilinear(const Grid2DObject &i_grid, const double &factor);
                static const Grid2DObject cubicBSpline(const Grid2DObject &i_grid, const double &factor);
 
                static const Array2D<double> Nearest(const Array2D<double> &i_grid, const double &factor_x, const double &factor_y);
                static const Array2D<double> Bilinear(const Array2D<double> &i_grid, const double &factor_x, const double &factor_y);
                static const Array2D<double> cubicBSpline(const Array2D<double> &i_grid, const double &factor_x, const double &factor_y);
 
        private:
                static void cubicBSpline(Array2D<double> &o_grid, const Array2D<double> &i_grid);
                static void Bilinear(Array2D<double> &o_grid, const Array2D<double> &i_grid);
                static void Nearest(Array2D<double> &o_grid, const Array2D<double> &i_grid);
 
                static double bilinear_pixel(const Array2D<double> &i_grid, const size_t &org_ii, const size_t &org_jj, const size_t &org_ncols, const size_t &org_nrows, const double &x, const double &y);
                static double BSpline_weight(const double &x);
};
} //end namespace
 
#endif