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compositor: Don't emit size-changed when only position changes

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Waking up gnome-shell and triggering JavaScript listeners of
`size-changed` every time a window was only moved was wasting a lot
of CPU.

This cuts the CPU requirement for dragging windows by around 22%.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/568
This commit is contained in:
Daniel van Vugt 2019-05-07 18:08:13 +08:00
parent b0b1ff36ae
commit 01e20a6ba9
3 changed files with 52 additions and 11 deletions
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6
src/compositor/compositor.c
View File

@ -1134,7 +1134,11 @@ meta_compositor_sync_window_geometry (MetaCompositor *compositor,
gboolean did_placement)
{
MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window));
meta_window_actor_sync_actor_geometry (window_actor, did_placement);
MetaWindowActorChanges changes;
changes = meta_window_actor_sync_actor_geometry (window_actor, did_placement);
if (changes & META_WINDOW_ACTOR_CHANGE_SIZE)
meta_plugin_manager_event_size_changed (compositor->plugin_mgr, window_actor);
}

10
src/compositor/meta-window-actor-private.h
View File

@ -28,6 +28,12 @@ struct _MetaWindowActorClass
void (*queue_destroy) (MetaWindowActor *actor);
};
typedef enum
{
META_WINDOW_ACTOR_CHANGE_SIZE = 1 << 0,
META_WINDOW_ACTOR_CHANGE_POSITION = 1 << 1
} MetaWindowActorChanges;
void meta_window_actor_queue_destroy (MetaWindowActor *self);
void meta_window_actor_show (MetaWindowActor *self,
@ -59,8 +65,10 @@ void meta_window_actor_set_unredirected (MetaWindowActor *self,
gboolean unredirected);
gboolean meta_window_actor_effect_in_progress (MetaWindowActor *self);
void meta_window_actor_sync_actor_geometry (MetaWindowActor *self,
MetaWindowActorChanges meta_window_actor_sync_actor_geometry (MetaWindowActor *self,
gboolean did_placement);
void meta_window_actor_update_shape (MetaWindowActor *self);
void meta_window_actor_update_opacity (MetaWindowActor *self);
void meta_window_actor_mapped (MetaWindowActor *self);

43
src/compositor/meta-window-actor.c
View File

@ -1120,13 +1120,15 @@ meta_window_actor_queue_destroy (MetaWindowActor *self)
clutter_actor_destroy (CLUTTER_ACTOR (self));
}
void
MetaWindowActorChanges
meta_window_actor_sync_actor_geometry (MetaWindowActor *self,
gboolean did_placement)
{
MetaWindowActorPrivate *priv =
meta_window_actor_get_instance_private (self);
MetaRectangle window_rect;
ClutterActor *actor = CLUTTER_ACTOR (self);
MetaWindowActorChanges changes = 0;
meta_window_get_buffer_rect (priv->window, &window_rect);
@ -1144,15 +1146,42 @@ meta_window_actor_sync_actor_geometry (MetaWindowActor *self,
* updates.
*/
if (is_frozen (self) && !did_placement)
return;
return META_WINDOW_ACTOR_CHANGE_POSITION | META_WINDOW_ACTOR_CHANGE_SIZE;
if (meta_window_actor_effect_in_progress (self))
return;
return META_WINDOW_ACTOR_CHANGE_POSITION | META_WINDOW_ACTOR_CHANGE_SIZE;
clutter_actor_set_position (CLUTTER_ACTOR (self),
window_rect.x, window_rect.y);
clutter_actor_set_size (CLUTTER_ACTOR (self),
window_rect.width, window_rect.height);
if (clutter_actor_has_allocation (actor))
{
ClutterActorBox box;
float old_x, old_y;
float old_width, old_height;
clutter_actor_get_allocation_box (actor, &box);
old_x = box.x1;
old_y = box.y1;
old_width = box.x2 - box.x1;
old_height = box.y2 - box.y1;
if (old_x != window_rect.x || old_y != window_rect.y)
changes |= META_WINDOW_ACTOR_CHANGE_POSITION;
if (old_width != window_rect.width || old_height != window_rect.height)
changes |= META_WINDOW_ACTOR_CHANGE_SIZE;
}
else
{
changes = META_WINDOW_ACTOR_CHANGE_POSITION | META_WINDOW_ACTOR_CHANGE_SIZE;
}
if (changes & META_WINDOW_ACTOR_CHANGE_POSITION)
clutter_actor_set_position (actor, window_rect.x, window_rect.y);
if (changes & META_WINDOW_ACTOR_CHANGE_SIZE)
clutter_actor_set_size (actor, window_rect.width, window_rect.height);
return changes;
}
void