X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fcanvas%2Fpoly_item.cc;h=69afb5ac24b93df1efdd9703080e79cc079ec7fa;hb=2d283c17e17940c356af0cc1366b714e0d7b76be;hp=ebf744a0b2fccacc2a35160148d74cbed65d4f3e;hpb=a585816f3eb0209c7e49ca5cc7127653e7b6c41c;p=ardour.git

diff --git a/libs/canvas/poly_item.cc b/libs/canvas/poly_item.cc
index ebf744a0b2..69afb5ac24 100644
--- a/libs/canvas/poly_item.cc
+++ b/libs/canvas/poly_item.cc
@@ -64,12 +64,17 @@ PolyItem::compute_bounding_box () const
 }
 
 void
-PolyItem::render_path (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const
+PolyItem::render_path (Rect const & /* area */, Cairo::RefPtr<Cairo::Context> context) const
 {
+	if (_points.size() < 2) {
+		return;
+	}
+
 	Points::const_iterator i = _points.begin();
 	Duple c (item_to_window (Duple (i->x, i->y)));
 
 	context->move_to (c.x, c.y);
+	++i;
 
 	while (i != _points.end()) {
 		c = item_to_window (Duple (i->x, i->y));
@@ -81,8 +86,6 @@ PolyItem::render_path (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> cont
 void
 PolyItem::render_curve (Rect const & area, Cairo::RefPtr<Cairo::Context> context, Points const & first_control_points, Points const & second_control_points) const
 {
-	bool done_first = false;
-
 	if (_points.size() <= 2) {
 		render_path (area, context);
 		return;
@@ -90,26 +93,24 @@ PolyItem::render_curve (Rect const & area, Cairo::RefPtr<Cairo::Context> context
 
 	Points::const_iterator cp1 = first_control_points.begin();
 	Points::const_iterator cp2 = second_control_points.begin();
+	Points::const_iterator p = _points.begin();
 
-	for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) {
-
-		if (!done_first) {
-
-			Duple c = item_to_window (Duple (i->x, i->y));
-			context->move_to (c.x, c.y);
-			done_first = true;
-
-		} else {
+	Duple c = item_to_window (Duple (p->x, p->y));
+	context->move_to (c.x, c.y);
+	++p;
 
-			Duple c1 = item_to_window (Duple (cp1->x, cp1->y));
-			Duple c2 = item_to_window (Duple (cp2->x, cp2->y));
-			Duple c3 = item_to_window (Duple (i->x, i->y));
+	while (p != _points.end()) {
 
-			context->curve_to (c1.x, c1.y, c2.x, c2.y, c3.x, c3.y);
+		Duple c1 = item_to_window (Duple (cp1->x, cp1->y));
+		Duple c2 = item_to_window (Duple (cp2->x, cp2->y));
 
-			cp1++;
-			cp2++;
-		}
+		c = item_to_window (Duple (p->x, p->y));
+		
+		context->curve_to (c1.x, c1.y, c2.x, c2.y, c.x, c.y);
+		
+		++cp1;
+		++cp2;
+		++p;
 	}
 }