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meta-window-group: Use clutter's iteration API

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Use the clutter iteration API instead of copying the list of children.
This is more efficent.

https://bugzilla.gnome.org/show_bug.cgi?id=703332
This commit is contained in:
Adel Gadllah 2013-07-17 11:16:35 +02:00
parent 21fe5be026
commit e3855c77af
1 changed files with 25 additions and 28 deletions
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53
src/compositor/meta-window-group.c
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@ -91,8 +91,9 @@ meta_window_group_paint (ClutterActor *actor)
{
cairo_region_t *visible_region;
ClutterActor *stage;
ClutterActorIter iter;
ClutterActor *child;
cairo_rectangle_int_t visible_rect;
GList *children, *l;
int paint_x_origin, paint_y_origin;
int actor_x_origin, actor_y_origin;
int paint_x_offset, paint_y_offset;
@ -123,13 +124,6 @@ meta_window_group_paint (ClutterActor *actor)
paint_x_offset = paint_x_origin - actor_x_origin;
paint_y_offset = paint_y_origin - actor_y_origin;
/* We walk the list from top to bottom (opposite of painting order),
* and subtract the opaque area of each window out of the visible
* region that we pass to the windows below.
*/
children = clutter_actor_get_children (actor);
children = g_list_reverse (children);
/* Get the clipped redraw bounds from Clutter so that we can avoid
* painting shadows on windows that don't need to be painted in this
* frame. In the case of a multihead setup with mismatched monitor
@ -151,12 +145,17 @@ meta_window_group_paint (ClutterActor *actor)
cairo_region_subtract_rectangle (visible_region, &unredirected_rect);
}
for (l = children; l; l = l->next)
/* We walk the list from top to bottom (opposite of painting order),
* and subtract the opaque area of each window out of the visible
* region that we pass to the windows below.
*/
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_prev (&iter, &child))
{
if (!CLUTTER_ACTOR_IS_VISIBLE (l->data))
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
if (l->data == info->unredirected_window)
if (child == info->unredirected_window)
continue;
/* If an actor has effects applied, then that can change the area
@ -175,12 +174,12 @@ meta_window_group_paint (ClutterActor *actor)
* as well for the same reason, but omitted for simplicity in the
* hopes that no-one will do that.
*/
if (clutter_actor_has_effects (l->data))
if (clutter_actor_has_effects (child))
continue;
if (META_IS_WINDOW_ACTOR (l->data))
if (META_IS_WINDOW_ACTOR (child))
{
MetaWindowActor *window_actor = l->data;
MetaWindowActor *window_actor = META_WINDOW_ACTOR (child);
int x, y;
if (!meta_actor_is_untransformed (CLUTTER_ACTOR (window_actor), &x, &y))
@ -204,13 +203,12 @@ meta_window_group_paint (ClutterActor *actor)
meta_window_actor_set_visible_region_beneath (window_actor, visible_region);
cairo_region_translate (visible_region, x, y);
}
else if (META_IS_BACKGROUND_ACTOR (l->data) ||
META_IS_BACKGROUND_GROUP (l->data))
else if (META_IS_BACKGROUND_ACTOR (child) ||
META_IS_BACKGROUND_GROUP (child))
{
ClutterActor *background_actor = l->data;
int x, y;
if (!meta_actor_is_untransformed (CLUTTER_ACTOR (background_actor), &x, &y))
if (!meta_actor_is_untransformed (child, &x, &y))
continue;
x += paint_x_offset;
@ -218,10 +216,10 @@ meta_window_group_paint (ClutterActor *actor)
cairo_region_translate (visible_region, - x, - y);
if (META_IS_BACKGROUND_GROUP (background_actor))
meta_background_group_set_visible_region (META_BACKGROUND_GROUP (background_actor), visible_region);
if (META_IS_BACKGROUND_GROUP (child))
meta_background_group_set_visible_region (META_BACKGROUND_GROUP (child), visible_region);
else
meta_background_actor_set_visible_region (META_BACKGROUND_ACTOR (background_actor), visible_region);
meta_background_actor_set_visible_region (META_BACKGROUND_ACTOR (child), visible_region);
cairo_region_translate (visible_region, x, y);
}
}
@ -233,21 +231,20 @@ meta_window_group_paint (ClutterActor *actor)
/* Now that we are done painting, unset the visible regions (they will
* mess up painting clones of our actors)
*/
for (l = children; l; l = l->next)
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_next (&iter, &child))
{
if (META_IS_WINDOW_ACTOR (l->data))
if (META_IS_WINDOW_ACTOR (child))
{
MetaWindowActor *window_actor = l->data;
MetaWindowActor *window_actor = META_WINDOW_ACTOR (child);
meta_window_actor_reset_visible_regions (window_actor);
}
else if (META_IS_BACKGROUND_ACTOR (l->data))
else if (META_IS_BACKGROUND_ACTOR (child))
{
MetaBackgroundActor *background_actor = l->data;
MetaBackgroundActor *background_actor = META_BACKGROUND_ACTOR (child);
meta_background_actor_set_visible_region (background_actor, NULL);
}
}
g_list_free (children);
}
static gboolean