FloatImg/lib/interpolate.c

#include  <stdio.h>
#include  <stdlib.h>
#include  <unistd.h>
#include  <string.h>
#include  <math.h>

#include  "../floatimg.h"

int		verbosity;

/* ---------------------------------------------------------------- */
static int gray_interpolate(FloatImg *s1, FloatImg *s2, FloatImg *d, float coef)
{
return -1;
}
/* ---------------------------------------------------------------- */

int fimg_interpolate(FloatImg *s1, FloatImg *s2, FloatImg *d, float coef)
{
int		picsize, idx;

if (FIMG_TYPE_RGB != s1->type) {
        fprintf(stderr, "%s : bad src 1 type %d on %p\n", __func__, 
                                s1->type, s1);
        return -8;
        }

if (FIMG_TYPE_RGB != s2->type) {
        fprintf(stderr, "%s : bad src 2 type %d on %p\n", __func__, 
                                s2->type, s2);
        return -8;
        }
if (FIMG_TYPE_RGB != d->type) {
        fprintf(stderr, "%s : bad dst type %d on %p\n", __func__, 
                                d->type, d);
        return -9;
        }

picsize = d->width * d->height * 3;

for (idx=0; idx<picsize; idx++) {

	d->R[idx] = (coef * s1->R[idx]) + ((1.0-coef) * s2->R[idx]);

	}

return 0;
}
/* ---------------------------------------------------------------- */