proj/libs/dsputil/interpolate.h

#ifndef INTERPOLATE_H
#define INTERPOLATE_H

/* Single point interpolation */
float fcint(int order, int nx, int ny, float *f,
        float x, float y, float fillvalue);
double dcint(int order, int nx, int ny, double *f,
         double x, double y, double fillvalue);

/* Vectorized interpolation */
void fcint_vect(int order, int nx, int ny, float *f, float *g,
         int N, float *X, float *Y, float fillvalue);
void dcint_vect(int order, int nx, int ny, double *f, double *g,
          int N, double *X, double *Y, double fillvalue);
/* Affine transformation */
void daffine(int order, int nx, int ny, double *f, double *g,
         double a11, double a12, double a21, double a22, 
         double dx, double dy, double fillvalue);
void faffine(int order, int nx, int ny, float *f, float *g,
         float a11, float a12, float a21, float a22, 
         float dx, float dy, float fillvalue);


/* Shift image by (dx,dy). */
void fshift(int order, int nx, int ny, float *f, float *g,
        float dx, float dy, float fillvalue);
void dshift(int order, int nx, int ny, double *f, double *g,
        double dx, double dy, double fillvalue);


/* Scaling/resampling transformation */
void fscale(int order, int nx, int ny, float *f,
        int new_nx, int new_ny, float *g);
void dscale(int order, int nx, int ny, double *f,
        int new_nx, int new_ny, double *g);

#endif

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