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paint-volume: Do not take a reference on the actor

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The paint volume structure is cached in the Actor it references, and
this causes a reference cycle.

The paint volume is going to be used when painting, so the actor must
still be valid - otherwise Clutter will bail out far before than
accessing the actor pointer in ClutterPaintVolume.

Otherwise, we could have used dispose() to check for a valid actor and
remove a reference if the actor field is !NULL; it feels less clean,
though, since we're effectively managing an extra reference on
ourselves.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2431
This commit is contained in:
Emmanuele Bassi 2010-11-18 10:53:01 +00:00
parent 0371ba3976
commit a94ea93bde
2 changed files with 6 additions and 20 deletions
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8
clutter/clutter-actor.c
View File

@ -2694,7 +2694,6 @@ clutter_actor_set_rotation_internal (ClutterActor *self,
{
ClutterActorPrivate *priv = self->priv;
g_object_ref (self);
g_object_freeze_notify (G_OBJECT (self));
switch (axis)
@ -2716,7 +2715,6 @@ clutter_actor_set_rotation_internal (ClutterActor *self,
}
g_object_thaw_notify (G_OBJECT (self));
g_object_unref (self);
clutter_actor_queue_redraw (self);
}
@ -11692,7 +11690,7 @@ clutter_actor_get_transformed_paint_volume (ClutterActor *self,
return NULL;
volume = clutter_actor_get_paint_volume (self);
if (!volume)
if (volume == NULL)
return NULL;
_clutter_actor_get_relative_modelview (self, relative_to_ancestor, &matrix);
@ -11702,8 +11700,8 @@ clutter_actor_get_transformed_paint_volume (ClutterActor *self,
_clutter_paint_volume_copy_static (volume, transformed_volume);
_clutter_paint_volume_transform (transformed_volume, &matrix);
_clutter_paint_volume_axis_align (transformed_volume);
g_object_unref (transformed_volume->actor);
transformed_volume->actor = g_object_ref (relative_to_ancestor);
_clutter_paint_volume_set_reference_actor (transformed_volume,
relative_to_ancestor);
return transformed_volume;
}

18
clutter/clutter-paint-volume.c
View File

@ -60,7 +60,7 @@ _clutter_paint_volume_new (ClutterActor *actor)
pv = g_slice_new (ClutterPaintVolume);
pv->actor = g_object_ref (actor);
pv->actor = actor;
memset (pv->vertices, 0, 8 * sizeof (ClutterVertex));
@ -95,7 +95,7 @@ _clutter_paint_volume_init_static (ClutterActor *actor,
{
g_return_if_fail (actor != NULL);
pv->actor = g_object_ref (actor);
pv->actor = actor;
memset (pv->vertices, 0, 8 * sizeof (ClutterVertex));
@ -114,7 +114,6 @@ _clutter_paint_volume_copy_static (const ClutterPaintVolume *src_pv,
g_return_if_fail (src_pv != NULL && dst_pv != NULL);
memcpy (dst_pv, src_pv, sizeof (ClutterPaintVolume));
g_object_ref (dst_pv->actor);
dst_pv->is_static = TRUE;
}
@ -136,9 +135,6 @@ clutter_paint_volume_copy (const ClutterPaintVolume *pv)
g_return_val_if_fail (pv != NULL, NULL);
copy = g_slice_dup (ClutterPaintVolume, pv);
if (copy->actor)
g_object_ref (copy->actor);
copy->is_static = FALSE;
return copy;
@ -148,11 +144,6 @@ void
_clutter_paint_volume_set_from_volume (ClutterPaintVolume *pv,
const ClutterPaintVolume *src)
{
if (src->actor != pv->actor)
{
g_object_unref (pv->actor);
g_object_ref (src->actor);
}
memcpy (pv, src, sizeof (ClutterPaintVolume));
}
@ -169,8 +160,6 @@ clutter_paint_volume_free (ClutterPaintVolume *pv)
{
g_return_if_fail (pv != NULL);
g_object_unref (pv->actor);
if (G_LIKELY (pv->is_static))
return;
@ -918,6 +907,5 @@ _clutter_paint_volume_set_reference_actor (ClutterPaintVolume *pv,
{
g_return_if_fail (pv != NULL);
g_object_unref (pv->actor);
pv->actor = g_object_ref (actor);
pv->actor = actor;
}