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compositor: Ignore offscreen windows when unredirecting

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When determining whether we should unredirect a window or not, ignore
offscreen windows, and just check the top most visible window.

Previously this was not an issue, but since 'stack-tracker: Keep
override redirect windows on top' we started sorting the UI frames
window, which is an offscreen override redirect window, on top, causing
the unredirect checking code to always check whether to unredirect the
UI frames window. This effectively disabled the compositor bypass
functionality.

https://bugzilla.gnome.org/show_bug.cgi?id=788493
This commit is contained in:
Jonas Ådahl 2017-10-13 16:29:20 +08:00
parent 4d763e1828
commit 2e99963087
2 changed files with 43 additions and 6 deletions
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2
src/compositor/compositor-private.h
View File

@ -31,6 +31,8 @@ struct _MetaCompositor
CoglContext *context;
MetaWindowActor *top_window_actor;
/* Used for unredirecting fullscreen windows */
guint disable_unredirect_count;
MetaWindow *unredirected_window;

45
src/compositor/compositor.c
View File

@ -923,6 +923,32 @@ sync_actor_stacking (MetaCompositor *compositor)
g_list_free (backgrounds);
}
/*
* Find the top most window that is visible on the screen. The intention of
* this is to avoid offscreen windows that isn't actually part of the visible
* desktop (such as the UI frames override redirect window).
*/
static MetaWindowActor *
get_top_visible_window_actor (MetaCompositor *compositor)
{
GList *l;
for (l = g_list_last (compositor->windows); l; l = l->prev)
{
MetaWindowActor *window_actor = l->data;
MetaWindow *window = meta_window_actor_get_meta_window (window_actor);
MetaRectangle buffer_rect;
meta_window_get_buffer_rect (window, &buffer_rect);
if (meta_rectangle_overlap (&compositor->display->screen->rect,
&buffer_rect))
return window_actor;
}
return NULL;
}
void
meta_compositor_sync_stack (MetaCompositor *compositor,
GList *stack)
@ -1009,6 +1035,8 @@ meta_compositor_sync_stack (MetaCompositor *compositor,
}
sync_actor_stacking (compositor);
compositor->top_window_actor = get_top_visible_window_actor (compositor);
}
void
@ -1065,19 +1093,26 @@ static gboolean
meta_pre_paint_func (gpointer data)
{
GList *l;
MetaWindowActor *top_window;
MetaWindowActor *top_window_actor;
MetaCompositor *compositor = data;
if (compositor->windows == NULL)
return TRUE;
top_window = g_list_last (compositor->windows)->data;
if (meta_window_actor_should_unredirect (top_window) &&
top_window_actor = compositor->top_window_actor;
if (top_window_actor &&
meta_window_actor_should_unredirect (top_window_actor) &&
compositor->disable_unredirect_count == 0)
set_unredirected_window (compositor, meta_window_actor_get_meta_window (top_window));
{
MetaWindow *top_window;
top_window = meta_window_actor_get_meta_window (top_window_actor);
set_unredirected_window (compositor, top_window);
}
else
{
set_unredirected_window (compositor, NULL);
}
for (l = compositor->windows; l; l = l->next)
meta_window_actor_pre_paint (l->data);