From 7157ce47a32037533863055fe3def7fde26abee3 Mon Sep 17 00:00:00 2001
From: tth <sigfood@dinorama.fr>
Date: Mon, 2 Sep 2019 10:07:56 +0200
Subject: [PATCH] time to optimize for velocity

---
 essai.c         | 27 ++++++++++++---------------
 lib/Makefile    |  2 +-
 lib/fimg-math.c |  9 ++++++++-
 3 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/essai.c b/essai.c
index ba511ae..1112a99 100644
--- a/essai.c
+++ b/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);
diff --git a/lib/Makefile b/lib/Makefile
index 35ef471..278f36c 100644
--- a/lib/Makefile
+++ b/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
diff --git a/lib/fimg-math.c b/lib/fimg-math.c
index 097a5b8..b90e8fb 100644
--- a/lib/fimg-math.c
+++ b/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;
 	}
 
 }