Bibliothèque de traitements d'images en virgule flottante. http://la.buvette.org/photos/cumul/
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/*
* FLOATIMG
* effets spéciaux àlc sur les couleurs
*/
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include "../floatimg.h"
/* --------------------------------------------------------------------- */
/*
* OMG ! a Color Graphic Adaptor emulator :)
*/
int fimg_killcolors_a(FloatImg *fimg, float fval)
{
int nbpix, foo;
if (FIMG_TYPE_RGB != fimg->type) {
fprintf(stderr, "%s: bad src type %d on %p\n", __func__,
fimg->type, fimg);
return -8;
}
nbpix = fimg->width * fimg->height;
for (foo=0; foo<nbpix; foo++) {
if (fimg->R[foo] > fimg->G[foo])
fimg->B[foo] = fimg->R[foo];
else
fimg->B[foo] = fimg->G[foo];
}
return 0;
}
/* --------------------------------------------------------------------- */
/*
* parameter fval is not used, why ?
*/
int fimg_killcolors_b(FloatImg *fimg, float fval)
{
int nbpix, foo;
if (FIMG_TYPE_RGB != fimg->type) {
fprintf(stderr, "%s: bad src type %d on %p\n", __func__,
fimg->type, fimg);
return -8;
}
nbpix = fimg->width * fimg->height;
for (foo=0; foo<nbpix; foo++) {
if (fimg->R[foo] > fimg->B[foo])
fimg->G[foo] = fimg->R[foo];
else
fimg->G[foo] = fimg->B[foo];
}
return 0;
}
/* --------------------------------------------------------------------- */
int fimg_colors_mixer_a(FloatImg *fimg, float fval)
{
int nbpix, foo;
float R, G, B;
if (FIMG_TYPE_RGB != fimg->type) {
fprintf(stderr, "%s: bad src type %d on %p\n", __func__,
fimg->type, fimg);
#if MUST_ABORT
abort();
#endif
return -8;
}
nbpix = fimg->width * fimg->height;
for (foo=0; foo<nbpix; foo++) {
R = (fimg->G[foo] + fimg->B[foo]) / fval;
G = (fimg->R[foo] + fimg->B[foo]) / fval;
B = (fimg->R[foo] + fimg->G[foo]) / fval;
fimg->R[foo] = R;
fimg->G[foo] = G;
fimg->B[foo] = B;
}
return 0;
}
/* --------------------------------------------------------------------- */