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wayland: Check if state and size changed before calling move_resize()

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The current implementation of the XdgSurface v6 protocol does not check
if the window changed before calling meta_window_wayland_move_resize().

The problem with this approach is that calling this function is a costly
operation since we enter the compositor side. In GNOME Shell case, it is
in JavaScript, which triggers a GJS trampoline. Calling this function on
every mouse movement is naturally as terrible as it could be - and is
exactly what happens now.

This commit adds the necessary checks to only call move_resize() when
the window actually changed, or when it needs to be updated.

https://bugzilla.gnome.org/show_bug.cgi?id=780292
Issue: #78
This commit is contained in:
Georges Basile Stavracas Neto 2018-03-17 05:03:12 -03:00
parent 1c00cd5ca3
commit 2872bb1f2a
2 changed files with 34 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
src/wayland/meta-wayland-legacy-xdg-shell.c
View File

@ -585,6 +585,17 @@ is_new_size_hints_valid (MetaWindow *window,
(new_max_height == 0 || new_min_height <= new_max_height));
}
static inline gboolean
did_geometry_change (MetaWaylandZxdgSurfaceV6 *xdg_surface,
MetaWaylandPendingState *pending)
{
MetaWaylandZxdgSurfaceV6Private *priv =
meta_wayland_zxdg_surface_v6_get_instance_private (xdg_surface);
return pending->has_new_geometry &&
!meta_rectangle_equal (&priv->geometry, &pending->new_geometry);
}
static void
meta_wayland_zxdg_toplevel_v6_commit (MetaWaylandSurfaceRole *surface_role,
MetaWaylandPendingState *pending)
@ -600,6 +611,11 @@ meta_wayland_zxdg_toplevel_v6_commit (MetaWaylandSurfaceRole *surface_role,
meta_wayland_surface_role_get_surface (surface_role);
MetaWindow *window = surface->window;
MetaRectangle window_geometry;
gboolean geometry_changed;
/* This check must happen before chaining up, otherwise the new geometry
* is applied and it'll always return FALSE. */
geometry_changed = did_geometry_change (xdg_surface, pending);
surface_role_class =
META_WAYLAND_SURFACE_ROLE_CLASS (meta_wayland_zxdg_toplevel_v6_parent_class);
@ -618,7 +634,7 @@ meta_wayland_zxdg_toplevel_v6_commit (MetaWaylandSurfaceRole *surface_role,
if (!window)
return;
if (pending->has_new_geometry)
if (geometry_changed || meta_window_wayland_needs_move_resize (window))
{
window_geometry =
meta_wayland_zxdg_surface_v6_get_window_geometry (xdg_surface);

18
src/wayland/meta-wayland-xdg-shell.c
View File

@ -608,6 +608,17 @@ is_new_size_hints_valid (MetaWindow *window,
(new_max_height == 0 || new_min_height <= new_max_height));
}
static inline gboolean
did_geometry_change (MetaWaylandXdgSurface *xdg_surface,
MetaWaylandPendingState *pending)
{
MetaWaylandXdgSurfacePrivate *priv =
meta_wayland_xdg_surface_get_instance_private (xdg_surface);
return pending->has_new_geometry &&
!meta_rectangle_equal (&priv->geometry, &pending->new_geometry);
}
static void
meta_wayland_xdg_toplevel_commit (MetaWaylandSurfaceRole *surface_role,
MetaWaylandPendingState *pending)
@ -621,6 +632,7 @@ meta_wayland_xdg_toplevel_commit (MetaWaylandSurfaceRole *surface_role,
meta_wayland_surface_role_get_surface (surface_role);
MetaWindow *window;
MetaRectangle window_geometry;
gboolean geometry_changed;
if (!surface->buffer_ref.buffer && xdg_surface_priv->first_buffer_attached)
{
@ -630,6 +642,10 @@ meta_wayland_xdg_toplevel_commit (MetaWaylandSurfaceRole *surface_role,
window = surface->window;
/* This check must happen before chaining up, otherwise the new geometry
* is applied and it'll always return FALSE. */
geometry_changed = did_geometry_change (xdg_surface, pending);
surface_role_class =
META_WAYLAND_SURFACE_ROLE_CLASS (meta_wayland_xdg_toplevel_parent_class);
surface_role_class->commit (surface_role, pending);
@ -643,7 +659,7 @@ meta_wayland_xdg_toplevel_commit (MetaWaylandSurfaceRole *surface_role,
if (!pending->newly_attached)
return;
if (pending->has_new_geometry)
if (geometry_changed || meta_window_wayland_needs_move_resize (window))
{
window_geometry = meta_wayland_xdg_surface_get_window_geometry (xdg_surface);
meta_window_wayland_move_resize (window,