#ifndef pst_map_rescale_values_H
#define pst_map_rescale_values_H

/* pst_map_rescale_values.h -- procedures for working with height maps. */
/* Last edited on 2025-02-27 12:08:59 by stolfi */

#include <stdint.h>

#include <float_image.h>

void pst_map_rescale_values
  ( float_image_t *A,
    int32_t wch,
    float a0,
    float a1,
    float z0,
    float z1
  );
  /* Maps every sample of every channel {c}, except {wch},
    by the affine function that takes {[a0 _ a1]} to {[z0 _ z1]}. 
    
    If {wch} is a valid channel index of {A}, every sample {A[wch,X,Y]}
    is interpreted as a reliability weight for the samples {A[c,X,Y]} in
    channels {c != wch}. If any input or output sample {A[c,X,Y]} is not
    finite or its weight is zero, then {A[wch,X,Y]} (if it exists) is
    set to zero and other samples {A[c,X,Y]} of that pixels are set to
    {NAN}. Otherwise the weights are not affected. */
 
#endif