From 2b3d8de11a536d668084ea6d2bf295da1d1cdc11 Mon Sep 17 00:00:00 2001
From: Andrea Canciani <ranma42@gmail.com>
Date: Sat, 16 Oct 2010 22:51:28 +0200
Subject: [PATCH] Fix degenerate arcs

Make sure that degenerate arcs become a move_to-line_to sequence
instead of just a move_to.

Fixes get-path-extents.
---
 src/cairo-arc.c | 4 ++++
 src/cairo.c     | 1 +
 2 files changed, 5 insertions(+)

diff --git a/src/cairo-arc.c b/src/cairo-arc.c
index 56d42f19e..1b2713f39 100644
--- a/src/cairo-arc.c
+++ b/src/cairo-arc.c
@@ -231,6 +231,10 @@ _cairo_arc_in_direction (cairo_t	  *cr,
 				angle,
 				angle + angle_step);
 	}
+    } else {
+	cairo_line_to (cr,
+		       xc + radius * cos (angle_min),
+		       yc + radius * sin (angle_min));
     }
 }
 
diff --git a/src/cairo.c b/src/cairo.c
index 157f898f4..5117f8a97 100644
--- a/src/cairo.c
+++ b/src/cairo.c
@@ -1852,6 +1852,7 @@ cairo_arc (cairo_t *cr,
 
     /* Do nothing, successfully, if radius is <= 0 */
     if (radius <= 0.0) {
+	cairo_line_to (cr, xc, yc); /* might become a move_to */
 	cairo_line_to (cr, xc, yc);
 	return;
     }