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MetaWaylandSurface: Don't respond to frame callback when role unassigned

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If a surface doesn't have a role, the compositor will not know how, if
or when it will be painted. By adding it to the compositor frame
callback list, the compositor will respond to the client that the
surface has been drawn already which might not be true.

Instead, queue the frame callback in a list that is then processed when
the surface gets a role assigned. The compositor may then, given the
role the surface got, queue the frame callback accordingly.

https://bugzilla.gnome.org/show_bug.cgi?id=744932
This commit is contained in:
Jonas Ådahl 2015-08-19 11:06:46 +08:00
parent dece49b53d
commit 8e5fb03611
2 changed files with 48 additions and 1 deletions
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44
src/wayland/meta-wayland-surface.c
View File

@ -76,10 +76,37 @@ gboolean
meta_wayland_surface_assign_role (MetaWaylandSurface *surface,
MetaWaylandSurfaceRole role)
{
MetaSurfaceActorWayland *surface_actor;
if (surface->role == META_WAYLAND_SURFACE_ROLE_NONE ||
surface->role == role)
{
surface->role = role;
switch (surface->role)
{
case META_WAYLAND_SURFACE_ROLE_NONE:
g_assert_not_reached();
break;
case META_WAYLAND_SURFACE_ROLE_XWAYLAND:
/* See apply_pending_state for explanation why Xwayland is special here. */
case META_WAYLAND_SURFACE_ROLE_CURSOR:
case META_WAYLAND_SURFACE_ROLE_DND:
wl_list_insert_list (&surface->compositor->frame_callbacks,
&surface->pending_frame_callback_list);
wl_list_init (&surface->pending_frame_callback_list);
break;
case META_WAYLAND_SURFACE_ROLE_WL_SHELL_SURFACE:
case META_WAYLAND_SURFACE_ROLE_SUBSURFACE:
case META_WAYLAND_SURFACE_ROLE_XDG_SURFACE:
case META_WAYLAND_SURFACE_ROLE_XDG_POPUP:
surface_actor = META_SURFACE_ACTOR_WAYLAND (surface->surface_actor);
meta_surface_actor_wayland_add_frame_callbacks (surface_actor,
&surface->pending_frame_callback_list);
wl_list_init (&surface->pending_frame_callback_list);
break;
}
return TRUE;
}
else
@ -495,6 +522,7 @@ apply_pending_state (MetaWaylandSurface *surface,
MetaWaylandPendingState *pending)
{
MetaWaylandCompositor *compositor = surface->compositor;
MetaSurfaceActorWayland *surface_actor;
if (pending->newly_attached)
{
@ -543,6 +571,13 @@ apply_pending_state (MetaWaylandSurface *surface,
switch (surface->role)
{
case META_WAYLAND_SURFACE_ROLE_NONE:
/* Since there is no role assigned to the surface yet, keep frame
* callbacks queued until a role is assigned and we know how
* the surface will be drawn.
*/
wl_list_insert_list (&surface->pending_frame_callback_list,
&pending->frame_callback_list);
break;
case META_WAYLAND_SURFACE_ROLE_XWAYLAND:
/* For Xwayland windows, throttling frames when the window isn't actually
* drawn is less useful, because Xwayland still has to do the drawing
@ -563,7 +598,8 @@ apply_pending_state (MetaWaylandSurface *surface,
case META_WAYLAND_SURFACE_ROLE_XDG_POPUP:
case META_WAYLAND_SURFACE_ROLE_WL_SHELL_SURFACE:
case META_WAYLAND_SURFACE_ROLE_SUBSURFACE:
meta_surface_actor_wayland_add_frame_callbacks (META_SURFACE_ACTOR_WAYLAND (surface->surface_actor),
surface_actor = META_SURFACE_ACTOR_WAYLAND (surface->surface_actor);
meta_surface_actor_wayland_add_frame_callbacks (surface_actor,
&pending->frame_callback_list);
break;
}
@ -942,6 +978,7 @@ wl_surface_destructor (struct wl_resource *resource)
{
MetaWaylandSurface *surface = wl_resource_get_user_data (resource);
MetaWaylandCompositor *compositor = surface->compositor;
MetaWaylandFrameCallback *cb, *next;
/* If we still have a window at the time of destruction, that means that
* the client is disconnecting, as the resources are destroyed in a random
@ -966,6 +1003,9 @@ wl_surface_destructor (struct wl_resource *resource)
g_hash_table_unref (surface->outputs);
wl_list_for_each_safe (cb, next, &surface->pending_frame_callback_list, link)
wl_resource_destroy (cb->resource);
if (surface->resource)
wl_resource_set_user_data (surface->resource, NULL);
@ -1002,6 +1042,8 @@ meta_wayland_surface_create (MetaWaylandCompositor *compositor,
surface->buffer_destroy_listener.notify = surface_handle_buffer_destroy;
surface->surface_actor = g_object_ref_sink (meta_surface_actor_wayland_new (surface));
wl_list_init (&surface->pending_frame_callback_list);
sync_drag_dest_funcs (surface);
surface->outputs = g_hash_table_new (NULL, NULL);

5
src/wayland/meta-wayland-surface.h
View File

@ -113,6 +113,11 @@ struct _MetaWaylandSurface
GList *subsurfaces;
GHashTable *outputs;
/* List of pending frame callbacks that needs to stay queued longer than one
* commit sequence, such as when it has not yet been assigned a role.
*/
struct wl_list pending_frame_callback_list;
struct {
const MetaWaylandDragDestFuncs *funcs;
} dnd;