[gtk/mask-nodes: 7/14] gsk: Use stroke bounds in the stroke node

[Matthias Clasen <matthiasc src gnome org>]

commit f0fa9882f2fc7bc4458d4dab1a9aafed003d9c1c
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Dec 15 23:10:43 2020 -0500

    gsk: Use stroke bounds in the stroke node
    
    We can use gsk_path_get_stroke_bounds to get a
    better estimate for the bounds of the stroke node.

 gsk/gskrendernodeimpl.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/gsk/gskrendernodeimpl.c b/gsk/gskrendernodeimpl.c
index b6527b450d..836a28b856 100644
--- a/gsk/gskrendernodeimpl.c
+++ b/gsk/gskrendernodeimpl.c
@@ -3928,6 +3928,7 @@ gsk_stroke_node_new (GskRenderNode   *child,
 {
   GskStrokeNode *self;
   GskRenderNode *node;
+  graphene_rect_t path_bounds;
 
   g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
   g_return_val_if_fail (path != NULL, NULL);
@@ -3940,8 +3941,10 @@ gsk_stroke_node_new (GskRenderNode   *child,
   self->path = gsk_path_ref (path);
   gsk_stroke_init_copy (&self->stroke, stroke);
 
-  /* XXX: Figure out a way to compute bounds from the path */
-  graphene_rect_init_from_rect (&node->bounds, &child->bounds);
+  if (gsk_path_get_stroke_bounds (path, stroke, &path_bounds))
+    graphene_rect_intersection (&path_bounds, &child->bounds, &node->bounds);
+  else
+    graphene_rect_init_from_rect (&node->bounds, graphene_rect_zero ());
 
   return node;
 }