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clutter/actor: Cache absolute modelview matrices

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While we're now doing a fairly good job at not needing those matrices
all the time anymore, we still need it multiple times during every paint
cycle, so it definitely makes sense to introduce some caching here.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2679>
This commit is contained in:
Jonas Dreßler 2022-06-05 16:59:15 +02:00 committed by Marge Bot
parent 4579e86330
commit 2ef4960b4f
1 changed files with 29 additions and 2 deletions
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31
clutter/clutter/clutter-actor.c
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@ -689,6 +689,8 @@ struct _ClutterActorPrivate
/* the cached transformation matrix; see apply_transform() */
graphene_matrix_t transform;
graphene_matrix_t absolute_modelview;
float resource_scale;
guint8 opacity;
@ -851,6 +853,7 @@ struct _ClutterActorPrivate
guint clear_stage_views_needs_stage_views_changed : 1;
guint needs_redraw : 1;
guint needs_finish_layout : 1;
guint absolute_modelview_valid : 1;
};
enum
@ -2494,6 +2497,7 @@ absolute_geometry_changed (ClutterActor *actor)
{
actor->priv->needs_update_stage_views = TRUE;
actor->priv->needs_visible_paint_volume_update = TRUE;
actor->priv->absolute_modelview_valid = FALSE;
actor->priv->needs_finish_layout = TRUE;
/* needs_finish_layout is already TRUE on the whole parent tree thanks
@ -2878,8 +2882,6 @@ clutter_actor_apply_transform_to_point (ClutterActor *self,
* instead.
*
*/
/* XXX: We should consider caching the stage relative modelview along with
* the actor itself */
void
clutter_actor_get_relative_transformation_matrix (ClutterActor *self,
ClutterActor *ancestor,
@ -3119,6 +3121,30 @@ _clutter_actor_apply_relative_transformation_matrix (ClutterActor *self,
if (self == ancestor)
return;
if (ancestor == NULL)
{
ClutterActorPrivate *priv = self->priv;
if (!priv->absolute_modelview_valid)
{
graphene_matrix_init_identity (&priv->absolute_modelview);
if (priv->parent != NULL)
{
_clutter_actor_apply_relative_transformation_matrix (priv->parent,
NULL,
&priv->absolute_modelview);
}
_clutter_actor_apply_modelview_transform (self, &priv->absolute_modelview);
priv->absolute_modelview_valid = TRUE;
}
graphene_matrix_multiply (&priv->absolute_modelview, matrix, matrix);
return;
}
if (self->priv->parent != NULL)
_clutter_actor_apply_relative_transformation_matrix (self->priv->parent,
ancestor,
@ -7595,6 +7621,7 @@ clutter_actor_init (ClutterActor *self)
priv->enable_model_view_transform = TRUE;
priv->transform_valid = FALSE;
priv->absolute_modelview_valid = FALSE;
/* the default is to stretch the content, to match the
* current behaviour of basically all actors. also, it's