From cf50eded175beb85c472747ae5c62333677685ed Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Sun, 13 Dec 2020 22:42:09 -0500
Subject: [PATCH] contour: Special-case circles for strokes

The outline of a circle is just two circles.
---
 gsk/gskcontour.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/gsk/gskcontour.c b/gsk/gskcontour.c
index 0f20a3dc51..b6c363286a 100644
--- a/gsk/gskcontour.c
+++ b/gsk/gskcontour.c
@@ -999,6 +999,23 @@ gsk_circle_contour_add_stroke (const GskContour *contour,
                                GskPathBuilder   *builder,
                                GskStroke        *stroke)
 {
+  const GskCircleContour *self = (const GskCircleContour *) contour;
+
+  if (stroke->dash_length == 0 &&
+      fabs (self->start_angle - self->end_angle) >= 360)
+    {
+      GskContour *c;
+
+      c = gsk_circle_contour_new (&self->center, self->radius + stroke->line_width / 2,
+                                  self->start_angle,
+                                  self->end_angle);
+      gsk_path_builder_add_contour (builder, c);
+
+      c = gsk_circle_contour_new (&self->center, self->radius - stroke->line_width / 2,
+                                  self->end_angle,
+                                  self->start_angle);
+      gsk_path_builder_add_contour (builder, c);
+    }
 }
 
 static void