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compositor: Do not optimize obscured areas away in paint volumes

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This optimization was presumably added before Clutter was able to
invalidate selected regions of an actor. Paint volumes are supposed
to be invariable as long as the actor conditions don't change.
Stacking of other actors shouldn't affect the paint volume, so it's
actually wrong to optimize those areas away here.

(cherry picked from commit ec8138773a417976a260619099a1649306a0a495)
This commit is contained in:
Carlos Garnacho 2018-04-28 18:10:49 +02:00 committed by Marco Trevisan (Treviño)
parent 47505dc5f6
commit 03dfcbab67
1 changed files with 1 additions and 36 deletions
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37
src/compositor/meta-shaped-texture.c
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@ -632,46 +632,11 @@ effective_unobscured_region (MetaShapedTexture *self)
return priv->unobscured_region;
}
static gboolean
get_unobscured_bounds (MetaShapedTexture *self,
cairo_rectangle_int_t *unobscured_bounds)
{
cairo_region_t *unobscured_region = effective_unobscured_region (self);
if (unobscured_region)
{
cairo_region_get_extents (unobscured_region, unobscured_bounds);
return TRUE;
}
else
return FALSE;
}
static gboolean
meta_shaped_texture_get_paint_volume (ClutterActor *actor,
ClutterPaintVolume *volume)
{
MetaShapedTexture *self = META_SHAPED_TEXTURE (actor);
ClutterActorBox box;
cairo_rectangle_int_t unobscured_bounds;
if (!clutter_actor_has_allocation (actor))
return FALSE;
clutter_actor_get_allocation_box (actor, &box);
if (get_unobscured_bounds (self, &unobscured_bounds))
{
box.x1 = MAX (unobscured_bounds.x, box.x1);
box.x2 = MIN (unobscured_bounds.x + unobscured_bounds.width, box.x2);
box.y1 = MAX (unobscured_bounds.y, box.y1);
box.y2 = MIN (unobscured_bounds.y + unobscured_bounds.height, box.y2);
}
box.x2 = MAX (box.x2, box.x1);
box.y2 = MAX (box.y2, box.y1);
clutter_paint_volume_union_box (volume, &box);
return TRUE;
return clutter_paint_volume_set_from_allocation (volume, actor);
}
void