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clutter/paint-nodes: Add opacity overriding to ClutterActorNode

Some effects, such as ShellBlurEffect and ClutterOffscreenEffect, need
to make sure the actor is painted fully opaque. With ClutterActorNode,
however, that is currently not possible.

Add a new 'opacity' parameter to clutter_actor_node_new(). It follows
the opacity override heuristic, where -1 means disable, and anything
else is clamped to [0, 255].

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1340>
This commit is contained in:
Georges Basile Stavracas Neto 2020-07-05 16:27:08 -03:00 committed by Marge Bot
parent 5c772a634e
commit 89f9be0dd1
4 changed files with 24 additions and 4 deletions

View file

@ -3669,7 +3669,7 @@ clutter_actor_paint (ClutterActor *self,
if (!CLUTTER_ACTOR_IS_MAPPED (self))
return;
actor_node = clutter_actor_node_new (self);
actor_node = clutter_actor_node_new (self, -1);
root_node = clutter_paint_node_ref (actor_node);
if (priv->has_clip)

View file

@ -209,7 +209,7 @@ clutter_effect_real_paint_node (ClutterEffect *effect,
actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
actor_node = clutter_actor_node_new (actor);
actor_node = clutter_actor_node_new (actor, -1);
clutter_paint_node_add_child (node, actor_node);
clutter_paint_node_unref (actor_node);
}

View file

@ -1115,6 +1115,8 @@ struct _ClutterActorNode
ClutterPaintNode parent_instance;
ClutterActor *actor;
int opacity_override;
int saved_opacity_override;
};
struct _ClutterActorNodeClass
@ -1130,6 +1132,14 @@ clutter_actor_node_pre_draw (ClutterPaintNode *node,
{
ClutterActorNode *actor_node = CLUTTER_ACTOR_NODE (node);
if (actor_node->opacity_override != -1)
{
actor_node->saved_opacity_override =
clutter_actor_get_opacity_override (actor_node->actor);
clutter_actor_set_opacity_override (actor_node->actor,
actor_node->opacity_override);
}
CLUTTER_SET_PRIVATE_FLAGS (actor_node->actor, CLUTTER_IN_PAINT);
return TRUE;
@ -1151,6 +1161,12 @@ clutter_actor_node_post_draw (ClutterPaintNode *node,
ClutterActorNode *actor_node = CLUTTER_ACTOR_NODE (node);
CLUTTER_UNSET_PRIVATE_FLAGS (actor_node->actor, CLUTTER_IN_PAINT);
if (actor_node->opacity_override != -1)
{
clutter_actor_set_opacity_override (actor_node->actor,
actor_node->saved_opacity_override);
}
}
static JsonNode *
@ -1192,6 +1208,7 @@ clutter_actor_node_init (ClutterActorNode *self)
/*
* clutter_actor_node_new:
* @actor: the actor to paint
* @opacity: opacity to draw the actor with, or -1 to use the actor's opacity
*
* Creates a new #ClutterActorNode.
*
@ -1203,7 +1220,8 @@ clutter_actor_node_init (ClutterActorNode *self)
* Use clutter_paint_node_unref() when done.
*/
ClutterPaintNode *
clutter_actor_node_new (ClutterActor *actor)
clutter_actor_node_new (ClutterActor *actor,
int opacity)
{
ClutterActorNode *res;
@ -1211,6 +1229,7 @@ clutter_actor_node_new (ClutterActor *actor)
res = _clutter_paint_node_create (CLUTTER_TYPE_ACTOR_NODE);
res->actor = actor;
res->opacity_override = CLAMP (opacity, -1, 255);
return (ClutterPaintNode *) res;
}

View file

@ -160,7 +160,8 @@ CLUTTER_EXPORT
GType clutter_actor_node_get_type (void) G_GNUC_CONST;
CLUTTER_EXPORT
ClutterPaintNode * clutter_actor_node_new (ClutterActor *actor);
ClutterPaintNode * clutter_actor_node_new (ClutterActor *actor,
int opacity);
#define CLUTTER_TYPE_ROOT_NODE (clutter_root_node_get_type ())
#define CLUTTER_ROOT_NODE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_ROOT_NODE, ClutterRootNode))