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clutter/actor: Use priv->parent instead of public API sometimes

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The public API to get the parent actor, clutter_actor_get_parent() does
a type check whether the actor is actually a ClutterActor. In case of
_clutter_actor_apply_relative_transformation_matrix(), which is called
recursively and very often during the paint process, this type check
shows up with almost twice the amount of hits than the actual matrix
multiplication.

So use the parent pointer directly in some code paths that are executed
very often and avoid the expensive type checking there, we can do that
since both places are not public API.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1259
This commit is contained in:
Jonas Dreßler 2020-03-20 17:39:35 +01:00 committed by Jonas Ådahl
parent 1d5f9b6917
commit a7bf6322e3
1 changed files with 4 additions and 7 deletions
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11
clutter/clutter/clutter-actor.c
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@ -2792,7 +2792,7 @@ _clutter_actor_propagate_queue_redraw (ClutterActor *self,
if (stop)
break;
self = clutter_actor_get_parent (self);
self = self->priv->parent;
}
}
@ -3310,8 +3310,6 @@ _clutter_actor_apply_relative_transformation_matrix (ClutterActor *self,
ClutterActor *ancestor,
CoglMatrix *matrix)
{
ClutterActor *parent;
/* Note we terminate before ever calling stage->apply_transform()
* since that would conceptually be relative to the underlying
* window OpenGL coordinates so we'd need a special @ancestor
@ -3319,10 +3317,9 @@ _clutter_actor_apply_relative_transformation_matrix (ClutterActor *self,
if (self == ancestor)
return;
parent = clutter_actor_get_parent (self);
if (parent != NULL)
_clutter_actor_apply_relative_transformation_matrix (parent, ancestor,
if (self->priv->parent != NULL)
_clutter_actor_apply_relative_transformation_matrix (self->priv->parent,
ancestor,
matrix);
_clutter_actor_apply_modelview_transform (self, matrix);