diff --git a/Fonderie/crapulator.c b/Fonderie/crapulator.c
index b57bfec..75485f4 100644
--- a/Fonderie/crapulator.c
+++ b/Fonderie/crapulator.c
@@ -10,6 +10,44 @@
 #include  "fonctions.h"
 #include  "crapulator.h"
 
+/* -------------------------------------------------------------- */
+/*	support function for the crapulator			  */
+static int effect_3(FloatImg *image)
+{
+float		value;
+int		foo;
+
+value = fimg_get_maxvalue(image);
+fimg_mul_cste(image, -1.0);
+fimg_add_cste(image, value);
+foo = fimg_count_negativ(image);
+if (foo) {
+	fimg_dump_to_file(image, "err.fimg", 0);
+	fprintf(stderr, "%s negativ %d\n",
+				__func__, foo);
+	return -78;
+	}
+return 0;
+}
+/* -------------------------------------------------------------- */
+static int insitu_ctr2x2(FloatImg *pimg)
+{
+FloatImg		img;
+int 			retval;
+
+fimg_clone(pimg, &img, 0);
+// XXX fimg_clear(&img);
+retval = fimg_contour_2x2(pimg, &img, 0);
+if (retval) {
+	fprintf(stderr, "%s : err contour %d\n",
+			__func__, retval);
+	exit(1);
+	}
+fimg_copy_data(&img, pimg);
+fimg_destroy(&img);
+
+return 0;
+}
 /* -------------------------------------------------------------- */
 /*
  *	This is the main filter engine
@@ -21,7 +59,6 @@ int			retval, foo;
 FloatImg		imgtmp;
 static int		count = 0;
 int			flag_debug = 0;
-float			value;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %d %f )\n", __func__,
@@ -49,16 +86,7 @@ switch (idFx) {
 				fimg_get_maxvalue(image));
 		break;
 	case 3:
-		value = fimg_get_maxvalue(image);
-		fimg_mul_cste(image, -1.0);
-		fimg_add_cste(image, value);
-		foo = fimg_count_negativ(image);
-		if (foo) {
-			fimg_dump_to_file(image, "err.fimg", 0);
-			fprintf(stderr, "%s negativ %d\n",
-						__func__, foo);
-			return -78;
-			}
+		retval = effect_3(image);
 		break;
 	case 4:
 		brotche_rand48_a(image, 0.20,
@@ -77,16 +105,7 @@ switch (idFx) {
 		break;
 
 	case 8:
-		fimg_clone(image, &imgtmp, 0);
-		fimg_clear(&imgtmp);
-		retval = fimg_contour_2x2(image, &imgtmp, 0);
-		if (retval) {
-			fprintf(stderr, "%s : err contour %d\n",
-					__func__, retval);
-			exit(1);
-			}
-		fimg_copy_data(&imgtmp, image);
-		fimg_destroy(&imgtmp);
+		retval = insitu_ctr2x2(image);
 		break;
 
 	case 9: