interpolation.h

#ifndef INTERPOLATION_H
#define INTERPOLATION_H

#ifdef __cplusplus
extern "C" {
#endif

    typedef struct DoubleComplex {
        double real;
        double imaginary;
    } DoubleComplex;

    double calcDistance(double width);
    
    double calcSphrShift(double index, double width);
    
    double calcInterpShift(double index, double width);
    
    double calcSphrSample(double x);
    
    double calcResolutionShift(double index, double width);
    
    int calcRelativeIndex(double x, double width);
    
    void interpolateKernel(DoubleComplex *source, DoubleComplex *destination, 
        int resolutionSupport, int textureSupport);
    
    void getBicubicNeighbours(double rowShift, double colShift, DoubleComplex *n,
        double *rs, double *cs, int sourceSupport, DoubleComplex *source);
    
    DoubleComplex interpolateCubicSample(DoubleComplex z0, DoubleComplex z1, 
        DoubleComplex z2, DoubleComplex z3, double x0, double x1, double x2,
        double x3, double h, double x);
    
    void printMatrix(DoubleComplex *matrix, int support);
    
    DoubleComplex complexScale(DoubleComplex z, double scalar);
    
    DoubleComplex complexAdd(DoubleComplex z0, DoubleComplex z1);
    
#ifdef __cplusplus
}
#endif

#endif /* INTERPOLATION_H */