X-Git-Url: https://git.wpitchoune.net/gitweb/?a=blobdiff_plain;f=src%2Fgraph.c;h=26a84d358da6cbe1f6c6abac5650de5fc5b49001;hb=23234e3cf7be4d07c11b911d4ee9a86a99ef4e3e;hp=f40e442c08b8aea72d7d1275ef4a2c9d2b82bd5d;hpb=2b51051578ef29b031d0927388c4d62baa3c525e;p=psensor.git

diff --git a/src/graph.c b/src/graph.c
index f40e442..26a84d3 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -171,27 +171,28 @@ static void draw_sensor_curve(struct psensor *s,
 			      int g_xoff,
 			      int g_yoff)
 {
-	int first = 1;
-	int i;
+	int first, i, x, y, t, dt, vdt;
+	double v;
 
 	cairo_set_source_rgb(cr,
 			     s->color->f_red,
 			     s->color->f_green,
 			     s->color->f_blue);
-	cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
-	cairo_set_line_width(cr, 1);
 
+	dt = et - bt;
+	first = 1;
 	for (i = 0; i < s->values_max_length; i++) {
-		int x, y, t;
-		double v;
-
 		t = s->measures[i].time.tv_sec;
 		v = s->measures[i].value.d_num;
 
-		if (v == UNKNOWN_DBL_VALUE || !t || (t - bt) < 0)
+		if (v == UNKNOWN_DBL_VALUE || !t)
 			continue;
 
-		x = (t - bt) * g_width / (et - bt) + g_xoff;
+		vdt = t - bt;
+		if (vdt < 0)
+			continue;
+
+		x = vdt * g_width / dt + g_xoff;
 
 		y = compute_y(v, min, max, g_height, g_yoff);
 
@@ -314,6 +315,9 @@ graph_update(struct psensor **sensors,
 
 	if (bt && et) {
 		sensor_cur = sensors;
+
+		cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
+		cairo_set_line_width(cr, 1);
 		while (*sensor_cur) {
 			struct psensor *s = *sensor_cur;