a new useless sfx

floatimg.h

@@ -98,6 +98,7 @@ int fimg_filter_3x3(FloatImg *s, FloatImg *d, FimgFilter3x3 *filtr);
 /*	'sfx0' module 			*/
 int fimg_killcolors_a(FloatImg *fimg, float fval);
 int fimg_killcolors_b(FloatImg *fimg, float fval);
+int fimg_colors_mixer_a(FloatImg *fimg, float fval);
 
 /*	funcs/rotate.c module		*/
 /*	#coronamaison			*/

funcs/sfx0.c

@@ -54,3 +54,33 @@ for (foo=0; foo<nbpix; 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;
+}
+/* --------------------------------------------------------------------- */