From 7fbabfd8ec8c4213139665abb2a50e8c6166a092 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Sat, 10 Oct 2015 08:44:12 -0400
Subject: [PATCH] Fixed the GTK+ drawing code to draw arc initial line segments
 in the correct place.

---
 unix/draw.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/unix/draw.c b/unix/draw.c
index 91db4180..25b79356 100644
--- a/unix/draw.c
+++ b/unix/draw.c
@@ -154,12 +154,13 @@ static void runPath(uiDrawPath *p, cairo_t *cr)
 		case arcTo:
 			// cairo_arc() and cairo_arc_negative() only go clockwise
 			// TODO explain why this works
-			cairo_arc(cr,
+			// don't use cairo_arc(); that requires us to put the starting point as the ending point
+			cairo_arc_negative(cr,
 				piece->d[0],
 				piece->d[1],
 				piece->d[2],
-				-(piece->d[3] + piece->d[4]),
-				-(piece->d[3]));
+				-(piece->d[3]),
+				-(piece->d[3] + piece->d[4]));
 			break;
 		case lineTo:
 			cairo_line_to(cr, piece->d[0], piece->d[1]);