Add a private getter for the stroke path

We will implement stroking by filling the stroke path.

Compute the stroke path ahead of time, so we don't have
to do it over and over.

This may change in the future, at least for simple
strokes, so keep this private.

gsk/gskrendernode.h

@@ -487,7 +487,7 @@ GskRenderNode *         gsk_stroke_node_get_child               (GskRenderNode
 GDK_AVAILABLE_IN_ALL
 GskPath *               gsk_stroke_node_get_path                (GskRenderNode            *node);
 GDK_AVAILABLE_IN_ALL
-const GskStroke *       gsk_stroke_node_get_stroke              (GskRenderNode            *node);
+const GskStroke *       gsk_stroke_node_get_stroke              (const GskRenderNode      *node);
 
 GDK_AVAILABLE_IN_ALL
 GType                   gsk_shadow_node_get_type                (void) G_GNUC_CONST;

gsk/gskrendernodeimpl.c

@@ -4567,6 +4567,7 @@ struct _GskStrokeNode
 
   GskRenderNode *child;
   GskPath *path;
+  GskPath *stroke_path;
   GskStroke stroke;
 };
 
@@ -4578,6 +4579,7 @@ gsk_stroke_node_finalize (GskRenderNode *node)
 
   gsk_render_node_unref (self->child);
   gsk_path_unref (self->path);
+  gsk_path_unref (self->stroke_path);
   gsk_stroke_clear (&self->stroke);
 
   parent_class->finalize (node);
@@ -4672,6 +4674,7 @@ gsk_stroke_node_new (GskRenderNode   *child,
   self->child = gsk_render_node_ref (child);
   self->path = gsk_path_ref (path);
   gsk_stroke_init_copy (&self->stroke, stroke);
+  self->stroke_path = gsk_path_stroke (path, &self->stroke);
 
   /* XXX: Figure out a way to compute bounds from the path */
   graphene_rect_init_from_rect (&node->bounds, &child->bounds);
@@ -4716,6 +4719,16 @@ gsk_stroke_node_get_path (GskRenderNode *node)
   return self->path;
 }
 
+GskPath *
+gsk_stroke_node_get_stroke_path (const GskRenderNode *node)
+{
+  const GskStrokeNode *self = (const GskStrokeNode *) node;
+
+  g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_STROKE_NODE), NULL);
+
+  return self->stroke_path;
+}
+
 /**
  * gsk_stroke_node_get_stroke:
  * @node: (type GskStrokeNode): a stroke #GskRenderNode
@@ -4725,9 +4738,9 @@ gsk_stroke_node_get_path (GskRenderNode *node)
  * Returns: a #GskStroke
  */
 const GskStroke *
-gsk_stroke_node_get_stroke (GskRenderNode *node)
+gsk_stroke_node_get_stroke (const GskRenderNode *node)
 {
-  GskStrokeNode *self = (GskStrokeNode *) node;
+  const GskStrokeNode *self = (const GskStrokeNode *) node;
 
   g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_STROKE_NODE), NULL);
 

gsk/gskrendernodeprivate.h

@@ -87,6 +87,7 @@ gboolean        gsk_container_node_is_disjoint          (const GskRenderNode
 
 gboolean        gsk_render_node_use_offscreen_for_opacity (const GskRenderNode       *node);
 
+GskPath *      gsk_stroke_node_get_stroke_path           (const GskRenderNode *node);
 
 G_END_DECLS