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actor: Replace private opacity_parent with opacity_override

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Replace the opacity_parent with an opacity_override variable, to allow
direct overriding of the paint opacity and simplify this mechanism
somewhat.

This also required a new private flag, in_clone_paint, to maintain the
functionality of the public function clutter_actor_is_in_clone_paint()
This commit is contained in:
Chris Lord 2011-02-03 13:58:20 +00:00
parent 75434b8a69
commit b2ea7d1352
3 changed files with 36 additions and 32 deletions
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6
clutter/clutter-actor-private.h
View File

@ -129,8 +129,10 @@ void _clutter_actor_rerealize (ClutterActor *self,
ClutterCallback callback,
gpointer data);
void _clutter_actor_set_opacity_parent (ClutterActor *self,
ClutterActor *parent);
void _clutter_actor_set_opacity_override (ClutterActor *self,
gint opacity);
void _clutter_actor_set_in_clone_paint (ClutterActor *self,
gboolean in_clone_paint);
void _clutter_actor_set_enable_model_view_transform (ClutterActor *self,
gboolean enable);

48
clutter/clutter-actor.c
View File

@ -412,6 +412,7 @@ struct _ClutterActorPrivate
guint propagated_one_redraw : 1;
guint paint_volume_valid : 1;
guint last_paint_box_valid : 1;
guint in_clone_paint : 1;
gfloat clip[4];
@ -436,6 +437,7 @@ struct _ClutterActorPrivate
gfloat z;
guint8 opacity;
gint opacity_override;
ClutterActor *parent_actor;
GList *children;
@ -453,8 +455,6 @@ struct _ClutterActorPrivate
PangoContext *pango_context;
ClutterActor *opacity_parent;
ClutterTextDirection text_direction;
gint internal_child;
@ -2581,9 +2581,9 @@ clutter_actor_paint (ClutterActor *self)
if (context->pick_mode == CLUTTER_PICK_NONE &&
/* ignore top-levels, since they might be transparent */
!CLUTTER_ACTOR_IS_TOPLEVEL (self) &&
/* If the actor is being painted from a clone then check the
clone's opacity instead */
(priv->opacity_parent ? priv->opacity_parent->priv : priv)->opacity == 0)
/* Use the override opacity if its been set */
((priv->opacity_override >= 0) ?
priv->opacity_override : priv->opacity) == 0)
{
priv->propagated_one_redraw = FALSE;
return;
@ -4901,7 +4901,7 @@ clutter_actor_init (ClutterActor *self)
priv->cached_width_age = 1;
priv->cached_height_age = 1;
priv->opacity_parent = NULL;
priv->opacity_override = -1;
priv->enable_model_view_transform = TRUE;
/* Initialize an empty paint box to start with */
@ -7065,8 +7065,8 @@ clutter_actor_get_paint_opacity_internal (ClutterActor *self)
if (CLUTTER_ACTOR_IS_TOPLEVEL (self))
return 255;
if (priv->opacity_parent != NULL)
return clutter_actor_get_paint_opacity_internal (priv->opacity_parent);
if (priv->opacity_override >= 0)
return priv->opacity_override;
parent = priv->parent_actor;
@ -10196,15 +10196,16 @@ clutter_actor_create_pango_layout (ClutterActor *self,
return layout;
}
/* Allows overriding the parent traversed when querying an actors paint
* opacity. Used by ClutterClone. */
/* Allows overriding the calculated paint opacity. Used by ClutterClone and
* ClutterOffscreenEffect.
*/
void
_clutter_actor_set_opacity_parent (ClutterActor *self,
ClutterActor *parent)
_clutter_actor_set_opacity_override (ClutterActor *self,
gint opacity)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
self->priv->opacity_parent = parent;
self->priv->opacity_override = opacity;
}
/* Allows you to disable applying the actors model view transform during
@ -10568,6 +10569,14 @@ clutter_actor_get_transformation_matrix (ClutterActor *self,
_clutter_actor_apply_modelview_transform (self, matrix);
}
void
_clutter_actor_set_in_clone_paint (ClutterActor *self,
gboolean in_clone_paint)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
self->priv->in_clone_paint = in_clone_paint;
}
/**
* clutter_actor_is_in_clone_paint:
* @self: a #ClutterActor
@ -10588,20 +10597,9 @@ clutter_actor_get_transformation_matrix (ClutterActor *self,
gboolean
clutter_actor_is_in_clone_paint (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
/* XXX - keep in sync with the overrides set by ClutterClone:
*
* - opacity_parent != NULL
* - enable_model_view_transform == FALSE
*/
priv = self->priv;
return priv->opacity_parent != NULL &&
!priv->enable_model_view_transform;
return self->priv->in_clone_paint;
}
static void

14
clutter/clutter-clone.c
View File

@ -169,13 +169,16 @@ clutter_clone_paint (ClutterActor *self)
: "unknown");
/* The final bits of magic:
* - We need to make sure that when the clone-source actor's paint
* method calls clutter_actor_get_paint_opacity, it traverses to
* us and our parent not it's real parent.
* - We need to override the paint opacity of the actor with our own
* opacity.
* - We need to inform the actor that it's in a clone paint (for the function
* clutter_actor_is_in_clone_paint())
* - We need to stop clutter_actor_paint applying the model view matrix of
* the clone source actor.
*/
_clutter_actor_set_opacity_parent (priv->clone_source, self);
_clutter_actor_set_in_clone_paint (priv->clone_source, TRUE);
_clutter_actor_set_opacity_override (priv->clone_source,
clutter_actor_get_paint_opacity (self));
_clutter_actor_set_enable_model_view_transform (priv->clone_source, FALSE);
if (!CLUTTER_ACTOR_IS_MAPPED (priv->clone_source))
@ -192,7 +195,8 @@ clutter_clone_paint (ClutterActor *self)
_clutter_actor_set_enable_paint_unmapped (priv->clone_source, FALSE);
_clutter_actor_set_enable_model_view_transform (priv->clone_source, TRUE);
_clutter_actor_set_opacity_parent (priv->clone_source, NULL);
_clutter_actor_set_opacity_override (priv->clone_source, -1);
_clutter_actor_set_in_clone_paint (priv->clone_source, FALSE);
}
gboolean