forked from tTh/FloatImg
97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
/*
|
|
* OPERATORS
|
|
*
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
#include "../floatimg.h"
|
|
|
|
extern int verbosity; /* must be declared around main() */
|
|
|
|
/* ---------------------------------------------------------------- */
|
|
int fimg_add(FloatImg *a, FloatImg *b, FloatImg *d)
|
|
{
|
|
int idx, nbiter;
|
|
|
|
#if DEBUG_LEVEL
|
|
fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
|
|
#endif
|
|
|
|
if (3 != a->type || 3 != b->type || 3 != d->type) {
|
|
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
|
|
return -8;
|
|
}
|
|
|
|
nbiter = a->width * a->height;
|
|
|
|
for (idx=0; idx<nbiter; idx++) {
|
|
d->R[idx] = a->R[idx] + b->R[idx];
|
|
d->G[idx] = a->G[idx] + b->G[idx];
|
|
d->B[idx] = a->B[idx] + b->B[idx];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* ---------------------------------------------------------------- */
|
|
/*
|
|
* A - B -> D
|
|
*/
|
|
int fimg_sub(FloatImg *a, FloatImg *b, FloatImg *d)
|
|
{
|
|
int idx, nbiter;
|
|
|
|
#if DEBUG_LEVEL
|
|
fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
|
|
#endif
|
|
|
|
if (3 != a->type || 3 != b->type || 3 != d->type) {
|
|
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
|
|
return -8;
|
|
}
|
|
|
|
nbiter = a->width * a->height;
|
|
|
|
for (idx=0; idx<nbiter; idx++) {
|
|
d->R[idx] = fabs(a->R[idx] - b->R[idx]);
|
|
d->G[idx] = fabs(a->G[idx] - b->G[idx]);
|
|
d->B[idx] = fabs(a->B[idx] - b->B[idx]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* ---------------------------------------------------------------- */
|
|
/* ---------------------------------------------------------------- */
|
|
/*
|
|
* A * B -> D
|
|
*/
|
|
int fimg_mul(FloatImg *a, FloatImg *b, FloatImg *d)
|
|
{
|
|
int idx, nbiter;
|
|
|
|
#if DEBUG_LEVEL
|
|
fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
|
|
#endif
|
|
|
|
if (3 != a->type || 3 != b->type || 3 != d->type) {
|
|
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
|
|
return -8;
|
|
}
|
|
|
|
nbiter = a->width * a->height;
|
|
|
|
for (idx=0; idx<nbiter; idx++) {
|
|
d->R[idx] = a->R[idx] * b->R[idx];
|
|
d->G[idx] = a->G[idx] * b->G[idx];
|
|
d->B[idx] = a->B[idx] * b->B[idx];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* ---------------------------------------------------------------- */
|