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window-actor/wayland: Improve scanout candidate check

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By ignoring obcured surfaces we can generalize the single-pixel-buffer
background check to work with arbitrary surface trees, as long as the
two top ones are the background and content surfaces.

As a nice side effect of this, clients like Firefox now usually take the
shorter `meta_window_is_fullscreen (window) && n_visible_surface_actors == 1`
route.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3699>
This commit is contained in:
Robert Mader 2024-04-13 16:50:20 +02:00 committed by Marge Bot
parent e5068bfc91
commit 1f82365021
1 changed files with 18 additions and 6 deletions
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24
src/compositor/meta-window-actor-wayland.c
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@ -350,7 +350,7 @@ meta_window_actor_wayland_get_scanout_candidate (MetaWindowActor *actor)
ClutterActor *child_actor;
ClutterActorIter iter;
MetaSurfaceActor *topmost_surface_actor = NULL;
int n_mapped_surfaces = 0;
int n_visible_surface_actors = 0;
MetaWindow *window;
ClutterActorBox window_box;
ClutterActorBox surface_box;
@ -365,11 +365,17 @@ meta_window_actor_wayland_get_scanout_candidate (MetaWindowActor *actor)
clutter_actor_iter_init (&iter, surface_container);
while (clutter_actor_iter_next (&iter, &child_actor))
{
MetaSurfaceActor *surface_actor;
if (!clutter_actor_is_mapped (child_actor))
continue;
topmost_surface_actor = META_SURFACE_ACTOR (child_actor);
n_mapped_surfaces++;
surface_actor = META_SURFACE_ACTOR (child_actor);
if (meta_surface_actor_is_obscured (surface_actor))
continue;
topmost_surface_actor = surface_actor;
n_visible_surface_actors++;
}
if (!topmost_surface_actor)
@ -380,10 +386,10 @@ meta_window_actor_wayland_get_scanout_candidate (MetaWindowActor *actor)
}
window = meta_window_actor_get_meta_window (actor);
if (meta_window_is_fullscreen (window) && n_mapped_surfaces == 1)
if (meta_window_is_fullscreen (window) && n_visible_surface_actors == 1)
return topmost_surface_actor;
if (meta_window_is_fullscreen (window) && n_mapped_surfaces == 2)
if (meta_window_is_fullscreen (window) && n_visible_surface_actors == 2)
{
MetaSurfaceActorWayland *bg_surface_actor = NULL;
MetaWaylandSurface *bg_surface;
@ -393,10 +399,16 @@ meta_window_actor_wayland_get_scanout_candidate (MetaWindowActor *actor)
clutter_actor_iter_init (&iter, surface_container);
while (clutter_actor_iter_next (&iter, &child_actor))
{
MetaSurfaceActor *surface_actor;
if (!clutter_actor_is_mapped (child_actor))
continue;
bg_surface_actor = META_SURFACE_ACTOR_WAYLAND (child_actor);
surface_actor = META_SURFACE_ACTOR (child_actor);
if (meta_surface_actor_is_obscured (surface_actor))
continue;
bg_surface_actor = META_SURFACE_ACTOR_WAYLAND (surface_actor);
break;
}
g_assert (bg_surface_actor);