[gtk/wip/otte/lottie: 166/173] path: Add gsk_path_measure_is_closed ()

[Benjamin Otte <otte src gnome org>]

commit fc1c3e4319cf79d3c202c1ac462edf8dff8bc54b
Author: Benjamin Otte <otte redhat com>
Date:   Thu Dec 17 05:00:10 2020 +0100

    path: Add gsk_path_measure_is_closed ()

 docs/reference/gsk/gsk4-sections.txt |  1 +
 gsk/gskpathmeasure.c                 | 24 ++++++++++++++++++++++++
 gsk/gskpathmeasure.h                 |  2 ++
 3 files changed, 27 insertions(+)
---
diff --git a/docs/reference/gsk/gsk4-sections.txt b/docs/reference/gsk/gsk4-sections.txt
index 8c8729302b..7c1f1488a1 100644
--- a/docs/reference/gsk/gsk4-sections.txt
+++ b/docs/reference/gsk/gsk4-sections.txt
@@ -386,6 +386,7 @@ gsk_path_measure_get_n_contours
 gsk_path_measure_restrict_to_contour
 <SUBSECTION>
 gsk_path_measure_get_length
+gsk_path_measure_is_closed
 gsk_path_measure_get_point
 gsk_path_measure_get_closest_point
 gsk_path_measure_get_closest_point_full
diff --git a/gsk/gskpathmeasure.c b/gsk/gskpathmeasure.c
index d9afeffcb4..c227b00838 100644
--- a/gsk/gskpathmeasure.c
+++ b/gsk/gskpathmeasure.c
@@ -275,6 +275,30 @@ gsk_path_measure_get_length (GskPathMeasure *self)
   return self->length;
 }
 
+/**
+ * gsk_path_measure_is_closed:
+ * @self: a #GskPathMeasure
+ *
+ * Returns if the path being measured represents a single closed
+ * contour.
+ *
+ * Returns: %TRUE if the current path is closed
+ **/
+gboolean
+gsk_path_measure_is_closed (GskPathMeasure *self)
+{
+  const GskContour *contour;
+
+  g_return_val_if_fail (self != NULL, FALSE);
+
+  /* XXX: is the empty path closed? Currently it's not */
+  if (self->last - self->first != 1)
+    return FALSE;
+
+  contour = gsk_path_get_contour (self->path, self->first);
+  return gsk_contour_get_flags (contour) & GSK_PATH_CLOSED ? TRUE : FALSE;
+}
+
 static float
 gsk_path_measure_clamp_distance (GskPathMeasure *self,
                                  float           distance)
diff --git a/gsk/gskpathmeasure.h b/gsk/gskpathmeasure.h
index 18ed926bac..4ea83af1c5 100644
--- a/gsk/gskpathmeasure.h
+++ b/gsk/gskpathmeasure.h
@@ -58,6 +58,8 @@ void                    gsk_path_measure_restrict_to_contour    (GskPathMeasure
 GDK_AVAILABLE_IN_ALL
 float                   gsk_path_measure_get_length             (GskPathMeasure         *self);
 GDK_AVAILABLE_IN_ALL
+gboolean                gsk_path_measure_is_closed              (GskPathMeasure         *self);
+GDK_AVAILABLE_IN_ALL
 void                    gsk_path_measure_get_point              (GskPathMeasure         *self,
                                                                  float                   distance,
                                                                  graphene_point_t       *pos,