time to optimize for velocity

essai.c

@@ -14,21 +14,11 @@
 int		verbosity;
 
 /* --------------------------------------------------------------------- */
-void fait_un_dessin(char *fname)
+void fait_un_dessin(FloatImg *dessin)
 {
-FloatImg	dessin;
-double		tb;
 
-puts("");
-fimg_timer_set(0);
-fimg_create(&dessin, 3200, 2400, 3);
-fimg_draw_something(&dessin);
-fimg_dump_to_file(&dessin, "dessin.fimg", 0);
-fimg_destroy(&dessin);
-tb = fimg_timer_get(0);
-fprintf(stderr, "%s = %f seconds\n", __func__, tb);
+fimg_draw_something(dessin);
 
-puts("");
 }
 /* --------------------------------------------------------------------- */
 void help(int k)
@@ -60,10 +50,17 @@ if (verbosity) fimg_print_version(0);
 fimg_create(&fimgA, W, H, 3);
 fimg_create(&fimgB, W, H, 3);
 
-fimg_timer_set(0);
 fimg_drand48(&fimgB, 100.0);
-fimg_drand48(&fimgA, 100.0);
-fimg_add(&fimgA, &fimgB, &fimgA);
+fimg_timer_set(0);
+#define NBP 500
+for (foo=0; foo<NBP; foo++) {
+	if (verbosity) {
+		printf("%5d / %5d\n", foo, NBP);
+		}
+	fait_un_dessin(&fimgB);
+	fimg_add(&fimgA, &fimgB, &fimgA);
+	fimg_mul(&fimgA, &fimgB, &fimgA);
+	}
 tb = fimg_timer_get(0);
 fprintf(stderr, "%s = %f seconds\n", __func__, tb);
 foo = fimg_save_as_pnm(&fimgA, "drand48.pnm", 0);

lib/Makefile

@@ -2,7 +2,7 @@
 #	building the base library
 #
 
-COPT = -Wall -fpic -g -no-pie  -DDEBUG_LEVEL=0
+COPT = -Wall -fpic -g -no-pie -pg  -DDEBUG_LEVEL=0
 OBJS = fimg-core.o fimg-pnm.o fimg-file.o fimg-math.o	\
 	fimg-timers.o operators.o fimg-2gray.o
 DEPS = Makefile ../floatimg.h

lib/fimg-math.c

@@ -117,9 +117,16 @@ int		nbre, idx;
 fprintf(stderr, ">>> %s ( %p %g )\n", __func__, fi, kmul);
 #endif
 
-nbre = fi->width * fi->height * fi->type;
+if (fi->type != FIMG_TYPE_RGB) {
+	fprintf(stderr, "%s : type %d invalide\n",
+				__func__, fi->type);
+	return;
+	}
+nbre = fi->width * fi->height;
 for (idx=0; idx<nbre; idx++) {
 	fi->R[idx] = drand48() * kmul;
+	fi->G[idx] = drand48() * kmul;
+	fi->B[idx] = drand48() * kmul;
 	}
 
 }