[gtk/path-ops: 15/25] contour: Fix winding for circle contour

[Matthias Clasen <matthiasc src gnome org>]

commit 23de9b9517b5601b0a2b0a24222d88efed295146
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Mar 27 15:15:44 2022 -0400

    contour: Fix winding for circle contour
    
    Test included.

 gsk/gskcontour.c                   | 4 ++--
 testsuite/gsk/path-special-cases.c | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/gsk/gskcontour.c b/gsk/gskcontour.c
index 330183af04..c978e91401 100644
--- a/gsk/gskcontour.c
+++ b/gsk/gskcontour.c
@@ -904,9 +904,9 @@ gsk_circle_contour_get_winding (const GskContour       *contour,
   if (fabs (self->start_angle - self->end_angle) >= 360)
     {
       if (self->start_angle < self->end_angle)
-        return -1;
-      else
         return 1;
+      else
+        return -1;
     }
 
   return 0;
diff --git a/testsuite/gsk/path-special-cases.c b/testsuite/gsk/path-special-cases.c
index 79389b5c1a..d4431419ff 100644
--- a/testsuite/gsk/path-special-cases.c
+++ b/testsuite/gsk/path-special-cases.c
@@ -321,6 +321,10 @@ test_path_winding (void)
     { "M 100 100  L 200 100 L 300 200 L 300 0 Z", GRAPHENE_POINT_INIT (150, 100), TRUE },
     { "M 100 100  L 200 100 L 300 200 L 300 0 Z", GRAPHENE_POINT_INIT (250, 100), TRUE },
     { "M 100 100  L 200 100 L 300 200 L 300 0 Z", GRAPHENE_POINT_INIT (400, 100), FALSE },
+    /* the following check that our elementary contours wind as expected.
+     * our rect contour is clockwise, our circle contour is counterclockwise
+     */
+    { "M100,100h100v100h-100z M200,150A50,50,0,1,0,100,150A50,50,0,1,0,200,150z", GRAPHENE_POINT_INIT 
(150,150), FALSE },
   };
   GskPath *path;
   GskPathMeasure *measure;