[mutter/wip/tablet-protocol: 1/15] wayland: Refactor MetaWaylandSurfaceRoleCursor

[Carlos Garnacho <carlosg src gnome org>]

commit c5cf2deb693aab66f31c9f8af9a0b88926a8b619
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Oct 21 16:36:44 2015 +0200

    wayland: Refactor MetaWaylandSurfaceRoleCursor
    
    Move into meta-wayland-surface.[ch], with the rest of the role
    declarations, and make generic enough to work for pointer and
    additional (eg. tablet) cursors.

 src/wayland/meta-wayland-pointer.c |  200 ++------------------------------
 src/wayland/meta-wayland-pointer.h |   10 +-
 src/wayland/meta-wayland-surface.c |  225 ++++++++++++++++++++++++++++++++++++
 src/wayland/meta-wayland-surface.h |   20 +++
 4 files changed, 259 insertions(+), 196 deletions(-)
---
diff --git a/src/wayland/meta-wayland-pointer.c b/src/wayland/meta-wayland-pointer.c
index 894a64d..20002b6 100644
--- a/src/wayland/meta-wayland-pointer.c
+++ b/src/wayland/meta-wayland-pointer.c
@@ -66,22 +66,6 @@
 
 #define DEFAULT_AXIS_STEP_DISTANCE wl_fixed_from_int (10)
 
-struct _MetaWaylandSurfaceRoleCursor
-{
-  MetaWaylandSurfaceRole parent;
-
-  int hot_x;
-  int hot_y;
-  MetaCursorSprite *cursor_sprite;
-};
-
-G_DEFINE_TYPE (MetaWaylandSurfaceRoleCursor,
-               meta_wayland_surface_role_cursor,
-               META_TYPE_WAYLAND_SURFACE_ROLE);
-
-static void
-meta_wayland_pointer_update_cursor_surface (MetaWaylandPointer *pointer);
-
 static MetaWaylandPointerClient *
 meta_wayland_pointer_client_new (void)
 {
@@ -742,7 +726,7 @@ meta_wayland_pointer_get_relative_coordinates (MetaWaylandPointer *pointer,
   *sy = wl_fixed_from_double (yf) / surface->scale;
 }
 
-static void
+void
 meta_wayland_pointer_update_cursor_surface (MetaWaylandPointer *pointer)
 {
   MetaCursorTracker *cursor_tracker = meta_cursor_tracker_get_for_screen (NULL);
@@ -756,7 +740,7 @@ meta_wayland_pointer_update_cursor_surface (MetaWaylandPointer *pointer)
           MetaWaylandSurfaceRoleCursor *cursor_role =
             META_WAYLAND_SURFACE_ROLE_CURSOR (pointer->cursor_surface->role);
 
-          cursor_sprite = cursor_role->cursor_sprite;
+          cursor_sprite = meta_wayland_surface_role_cursor_get_sprite (cursor_role, NULL, NULL);
         }
 
       meta_cursor_tracker_set_window_cursor (cursor_tracker, cursor_sprite);
@@ -768,68 +752,6 @@ meta_wayland_pointer_update_cursor_surface (MetaWaylandPointer *pointer)
 }
 
 static void
-update_cursor_sprite_texture (MetaWaylandSurface *surface)
-{
-  MetaCursorRenderer *cursor_renderer =
-    meta_backend_get_cursor_renderer (meta_get_backend ());
-  MetaCursorTracker *cursor_tracker = meta_cursor_tracker_get_for_screen (NULL);
-  MetaWaylandSurfaceRoleCursor *cursor_role =
-    META_WAYLAND_SURFACE_ROLE_CURSOR (surface->role);
-  MetaCursorSprite *cursor_sprite = cursor_role->cursor_sprite;
-  ClutterBackend *clutter_backend = clutter_get_default_backend ();
-  CoglContext *cogl_context =
-    clutter_backend_get_cogl_context (clutter_backend);
-  CoglTexture *texture;
-
-  if (surface->buffer)
-    {
-      struct wl_resource *buffer;
-
-      buffer = surface->buffer->resource;
-      texture = cogl_wayland_texture_2d_new_from_buffer (cogl_context,
-                                                         buffer,
-                                                         NULL);
-
-      meta_cursor_sprite_set_texture (cursor_sprite,
-                                      texture,
-                                      cursor_role->hot_x * surface->scale,
-                                      cursor_role->hot_y * surface->scale);
-      meta_cursor_renderer_realize_cursor_from_wl_buffer (cursor_renderer,
-                                                          cursor_sprite,
-                                                          buffer);
-      cogl_object_unref (texture);
-    }
-  else
-    {
-      meta_cursor_sprite_set_texture (cursor_sprite, NULL, 0, 0);
-    }
-
-  if (cursor_sprite == meta_cursor_tracker_get_displayed_cursor (cursor_tracker))
-    meta_cursor_renderer_force_update (cursor_renderer);
-}
-
-static void
-cursor_sprite_prepare_at (MetaCursorSprite *cursor_sprite,
-                          int x,
-                          int y,
-                          MetaWaylandSurfaceRoleCursor *cursor_role)
-{
-  MetaWaylandSurfaceRole *role = META_WAYLAND_SURFACE_ROLE (cursor_role);
-  MetaWaylandSurface *surface = meta_wayland_surface_role_get_surface (role);
-  MetaDisplay *display = meta_get_display ();
-  MetaScreen *screen = display->screen;
-  const MetaMonitorInfo *monitor;
-
-  if (!meta_xwayland_is_xwayland_surface (surface))
-    {
-      monitor = meta_screen_get_monitor_for_point (screen, x, y);
-      meta_cursor_sprite_set_texture_scale (cursor_sprite,
-                                            (float)monitor->scale / surface->scale);
-    }
-  meta_wayland_surface_update_outputs (surface);
-}
-
-static void
 meta_wayland_pointer_set_cursor_surface (MetaWaylandPointer *pointer,
                                          MetaWaylandSurface *cursor_surface)
 {
@@ -877,23 +799,17 @@ pointer_set_cursor (struct wl_client *client,
 
   if (surface)
     {
+      MetaCursorRenderer *cursor_renderer =
+        meta_backend_get_cursor_renderer (meta_get_backend ());
       MetaWaylandSurfaceRoleCursor *cursor_role;
+      MetaCursorSprite *sprite;
 
       cursor_role = META_WAYLAND_SURFACE_ROLE_CURSOR (surface->role);
-      if (!cursor_role->cursor_sprite)
-        {
-          cursor_role->cursor_sprite = meta_cursor_sprite_new ();
-          g_signal_connect_object (cursor_role->cursor_sprite,
-                                   "prepare-at",
-                                   G_CALLBACK (cursor_sprite_prepare_at),
-                                   cursor_role,
-                                   0);
-        }
-
-      cursor_role->hot_x = hot_x;
-      cursor_role->hot_y = hot_y;
-
-      update_cursor_sprite_texture (surface);
+      sprite =  meta_cursor_sprite_new ();
+      meta_wayland_surface_role_cursor_set_renderer (cursor_role,
+                                                     cursor_renderer);
+      meta_wayland_surface_role_cursor_set_sprite (cursor_role, sprite,
+                                                   hot_x, hot_y);
     }
 
   meta_wayland_pointer_set_cursor_surface (pointer, surface);
@@ -960,99 +876,3 @@ meta_wayland_pointer_get_top_popup (MetaWaylandPointer *pointer)
   grab = (MetaWaylandPopupGrab*)pointer->grab;
   return meta_wayland_popup_grab_get_top_popup(grab);
 }
-
-static void
-cursor_surface_role_assigned (MetaWaylandSurfaceRole *surface_role)
-{
-  MetaWaylandSurface *surface =
-    meta_wayland_surface_role_get_surface (surface_role);
-
-  meta_wayland_surface_queue_pending_frame_callbacks (surface);
-}
-
-static void
-cursor_surface_role_commit (MetaWaylandSurfaceRole  *surface_role,
-                            MetaWaylandPendingState *pending)
-{
-  MetaWaylandSurface *surface =
-    meta_wayland_surface_role_get_surface (surface_role);
-
-  meta_wayland_surface_queue_pending_state_frame_callbacks (surface, pending);
-
-  if (pending->newly_attached)
-    update_cursor_sprite_texture (surface);
-}
-
-static gboolean
-cursor_surface_role_is_on_output (MetaWaylandSurfaceRole *role,
-                                  MetaMonitorInfo        *monitor)
-{
-  MetaWaylandSurface *surface =
-    meta_wayland_surface_role_get_surface (role);
-  MetaWaylandPointer *pointer = &surface->compositor->seat->pointer;
-  MetaCursorTracker *cursor_tracker = meta_cursor_tracker_get_for_screen (NULL);
-  MetaCursorRenderer *cursor_renderer =
-    meta_backend_get_cursor_renderer (meta_get_backend ());
-  MetaWaylandSurfaceRoleCursor *cursor_role =
-    META_WAYLAND_SURFACE_ROLE_CURSOR (surface->role);
-  MetaCursorSprite *displayed_cursor_sprite;
-  MetaRectangle rect;
-
-  if (surface != pointer->cursor_surface)
-    return FALSE;
-
-  displayed_cursor_sprite =
-    meta_cursor_tracker_get_displayed_cursor (cursor_tracker);
-  if (!displayed_cursor_sprite)
-    return FALSE;
-
-  if (cursor_role->cursor_sprite != displayed_cursor_sprite)
-    return FALSE;
-
-  rect = meta_cursor_renderer_calculate_rect (cursor_renderer,
-                                              cursor_role->cursor_sprite);
-  return meta_rectangle_overlap (&rect, &monitor->rect);
-}
-
-static void
-cursor_surface_role_dispose (GObject *object)
-{
-  MetaWaylandSurfaceRoleCursor *cursor_role =
-    META_WAYLAND_SURFACE_ROLE_CURSOR (object);
-  MetaWaylandSurface *surface =
-    meta_wayland_surface_role_get_surface (META_WAYLAND_SURFACE_ROLE (object));
-  MetaWaylandCompositor *compositor = meta_wayland_compositor_get_default ();
-  MetaWaylandPointer *pointer = &compositor->seat->pointer;
-  MetaCursorTracker *cursor_tracker = meta_cursor_tracker_get_for_screen (NULL);
-
-  g_signal_handlers_disconnect_by_func (cursor_tracker,
-                                        (gpointer) cursor_sprite_prepare_at,
-                                        cursor_role);
-
-  if (pointer->cursor_surface == surface)
-    pointer->cursor_surface = NULL;
-  meta_wayland_pointer_update_cursor_surface (pointer);
-
-  g_clear_object (&cursor_role->cursor_sprite);
-
-  G_OBJECT_CLASS (meta_wayland_surface_role_cursor_parent_class)->dispose (object);
-}
-
-static void
-meta_wayland_surface_role_cursor_init (MetaWaylandSurfaceRoleCursor *role)
-{
-}
-
-static void
-meta_wayland_surface_role_cursor_class_init (MetaWaylandSurfaceRoleCursorClass *klass)
-{
-  MetaWaylandSurfaceRoleClass *surface_role_class =
-    META_WAYLAND_SURFACE_ROLE_CLASS (klass);
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-
-  surface_role_class->assigned = cursor_surface_role_assigned;
-  surface_role_class->commit = cursor_surface_role_commit;
-  surface_role_class->is_on_output = cursor_surface_role_is_on_output;
-
-  object_class->dispose = cursor_surface_role_dispose;
-}
diff --git a/src/wayland/meta-wayland-pointer.h b/src/wayland/meta-wayland-pointer.h
index 7e31da9..d14e1ad 100644
--- a/src/wayland/meta-wayland-pointer.h
+++ b/src/wayland/meta-wayland-pointer.h
@@ -31,12 +31,6 @@
 
 #include <meta/meta-cursor-tracker.h>
 
-#define META_TYPE_WAYLAND_SURFACE_ROLE_CURSOR (meta_wayland_surface_role_cursor_get_type ())
-G_DECLARE_FINAL_TYPE (MetaWaylandSurfaceRoleCursor,
-                      meta_wayland_surface_role_cursor,
-                      META, WAYLAND_SURFACE_ROLE_CURSOR,
-                      MetaWaylandSurfaceRole);
-
 struct _MetaWaylandPointerGrabInterface
 {
   void (*focus) (MetaWaylandPointerGrab *grab,
@@ -142,4 +136,8 @@ MetaWaylandPointerClient * meta_wayland_pointer_get_pointer_client (MetaWaylandP
                                                                     struct wl_client   *client);
 void meta_wayland_pointer_unbind_pointer_client_resource (struct wl_resource *resource);
 
+void meta_wayland_surface_cursor_update (MetaWaylandSurface *cursor_surface);
+
+void meta_wayland_pointer_update_cursor_surface (MetaWaylandPointer *pointer);
+
 #endif /* META_WAYLAND_POINTER_H */
diff --git a/src/wayland/meta-wayland-surface.c b/src/wayland/meta-wayland-surface.c
index f8f6ffc..d63a8fa 100644
--- a/src/wayland/meta-wayland-surface.c
+++ b/src/wayland/meta-wayland-surface.c
@@ -54,6 +54,7 @@
 #include "meta-surface-actor.h"
 #include "meta-surface-actor-wayland.h"
 #include "meta-xwayland-private.h"
+#include "meta-xwayland.h"
 
 typedef struct _MetaWaylandSurfaceRolePrivate
 {
@@ -124,6 +125,20 @@ G_DEFINE_TYPE (MetaWaylandSurfaceRoleDND,
                meta_wayland_surface_role_dnd,
                META_TYPE_WAYLAND_SURFACE_ROLE);
 
+struct _MetaWaylandSurfaceRoleCursor
+{
+  MetaWaylandSurfaceRole parent;
+
+  int hot_x;
+  int hot_y;
+  MetaCursorSprite *cursor_sprite;
+  MetaCursorRenderer *cursor_renderer;
+};
+
+G_DEFINE_TYPE (MetaWaylandSurfaceRoleCursor,
+               meta_wayland_surface_role_cursor,
+               META_TYPE_WAYLAND_SURFACE_ROLE);
+
 static void
 meta_wayland_surface_role_assigned (MetaWaylandSurfaceRole *surface_role);
 
@@ -2570,3 +2585,213 @@ meta_wayland_surface_role_subsurface_class_init (MetaWaylandSurfaceRoleSubsurfac
   surface_role_class->commit = subsurface_surface_commit;
   surface_role_class->is_on_output = actor_surface_is_on_output;
 }
+
+static void
+update_cursor_sprite_texture (MetaWaylandSurfaceRoleCursor *cursor_role)
+{
+  MetaWaylandSurface *surface = meta_wayland_surface_role_get_surface (META_WAYLAND_SURFACE_ROLE 
(cursor_role));
+  MetaCursorSprite *cursor_sprite = cursor_role->cursor_sprite;
+  ClutterBackend *clutter_backend = clutter_get_default_backend ();
+  CoglContext *cogl_context =
+    clutter_backend_get_cogl_context (clutter_backend);
+  CoglTexture *texture;
+
+  if (!cursor_role->cursor_renderer || !cursor_role->cursor_sprite)
+    return;
+
+  if (surface->buffer)
+    {
+      struct wl_resource *buffer;
+
+      buffer = surface->buffer->resource;
+      texture = cogl_wayland_texture_2d_new_from_buffer (cogl_context,
+                                                         buffer,
+                                                         NULL);
+
+      meta_cursor_sprite_set_texture (cursor_sprite,
+                                      texture,
+                                      cursor_role->hot_x * surface->scale,
+                                      cursor_role->hot_y * surface->scale);
+      meta_cursor_renderer_realize_cursor_from_wl_buffer (cursor_role->cursor_renderer,
+                                                          cursor_sprite,
+                                                          buffer);
+      cogl_object_unref (texture);
+    }
+  else
+    {
+      meta_cursor_sprite_set_texture (cursor_sprite, NULL, 0, 0);
+    }
+
+  meta_cursor_renderer_force_update (cursor_role->cursor_renderer);
+}
+
+static void
+cursor_sprite_prepare_at (MetaCursorSprite             *cursor_sprite,
+                          int                           x,
+                          int                           y,
+                          MetaWaylandSurfaceRoleCursor *cursor_role)
+{
+  MetaWaylandSurfaceRole *role = META_WAYLAND_SURFACE_ROLE (cursor_role);
+  MetaWaylandSurface *surface = meta_wayland_surface_role_get_surface (role);
+  MetaDisplay *display = meta_get_display ();
+  MetaScreen *screen = display->screen;
+  const MetaMonitorInfo *monitor;
+
+  if (!meta_xwayland_is_xwayland_surface (surface))
+    {
+      monitor = meta_screen_get_monitor_for_point (screen, x, y);
+      meta_cursor_sprite_set_texture_scale (cursor_sprite,
+                                            (float)monitor->scale / surface->scale);
+    }
+  meta_wayland_surface_update_outputs (surface);
+}
+
+static void
+cursor_surface_role_assigned (MetaWaylandSurfaceRole *surface_role)
+{
+  MetaWaylandSurface *surface =
+    meta_wayland_surface_role_get_surface (surface_role);
+
+  meta_wayland_surface_queue_pending_frame_callbacks (surface);
+}
+
+static void
+cursor_surface_role_commit (MetaWaylandSurfaceRole  *surface_role,
+                            MetaWaylandPendingState *pending)
+{
+  MetaWaylandSurface *surface =
+    meta_wayland_surface_role_get_surface (surface_role);
+
+  meta_wayland_surface_queue_pending_state_frame_callbacks (surface, pending);
+
+  if (pending->newly_attached)
+    update_cursor_sprite_texture (META_WAYLAND_SURFACE_ROLE_CURSOR (surface_role));
+}
+
+static gboolean
+cursor_surface_role_is_on_output (MetaWaylandSurfaceRole *role,
+                                  MetaMonitorInfo        *monitor)
+{
+  MetaWaylandSurface *surface =
+    meta_wayland_surface_role_get_surface (role);
+  MetaWaylandSurfaceRoleCursor *cursor_role =
+    META_WAYLAND_SURFACE_ROLE_CURSOR (surface->role);
+  MetaRectangle rect;
+
+  rect = meta_cursor_renderer_calculate_rect (cursor_role->cursor_renderer,
+                                              cursor_role->cursor_sprite);
+  return meta_rectangle_overlap (&rect, &monitor->rect);
+}
+
+static void
+cursor_surface_role_dispose (GObject *object)
+{
+  MetaWaylandSurfaceRoleCursor *cursor_role =
+    META_WAYLAND_SURFACE_ROLE_CURSOR (object);
+  MetaWaylandCompositor *compositor = meta_wayland_compositor_get_default ();
+  MetaWaylandPointer *pointer = &compositor->seat->pointer;
+  MetaWaylandSurface *surface =
+    meta_wayland_surface_role_get_surface (META_WAYLAND_SURFACE_ROLE (object));
+
+  meta_wayland_surface_role_cursor_set_sprite (cursor_role, NULL, 0, 0);
+
+  if (pointer->cursor_surface == surface)
+    pointer->cursor_surface = NULL;
+  meta_wayland_pointer_update_cursor_surface (pointer);
+
+  G_OBJECT_CLASS (meta_wayland_surface_role_cursor_parent_class)->dispose (object);
+}
+
+static void
+meta_wayland_surface_role_cursor_init (MetaWaylandSurfaceRoleCursor *role)
+{
+}
+
+static void
+meta_wayland_surface_role_cursor_class_init (MetaWaylandSurfaceRoleCursorClass *klass)
+{
+  MetaWaylandSurfaceRoleClass *surface_role_class =
+    META_WAYLAND_SURFACE_ROLE_CLASS (klass);
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  surface_role_class->assigned = cursor_surface_role_assigned;
+  surface_role_class->commit = cursor_surface_role_commit;
+  surface_role_class->is_on_output = cursor_surface_role_is_on_output;
+
+  object_class->dispose = cursor_surface_role_dispose;
+}
+
+void
+meta_wayland_surface_role_cursor_set_sprite (MetaWaylandSurfaceRoleCursor *cursor_role,
+                                             MetaCursorSprite             *cursor_sprite,
+                                             gint                          hotspot_x,
+                                             gint                          hotspot_y)
+{
+  if (cursor_role->cursor_sprite == cursor_sprite &&
+      cursor_role->hot_x == hotspot_x &&
+      cursor_role->hot_y == hotspot_y)
+    return;
+
+  if (cursor_role->cursor_sprite != cursor_sprite)
+    {
+      if (cursor_role->cursor_sprite)
+        {
+          g_signal_handlers_disconnect_by_func (cursor_role->cursor_sprite,
+                                                cursor_sprite_prepare_at,
+                                                cursor_role);
+          g_object_unref (cursor_role->cursor_sprite);
+        }
+
+      if (cursor_sprite)
+        {
+          g_object_ref (cursor_sprite);
+          g_signal_connect_object (cursor_sprite,
+                                   "prepare-at",
+                                   G_CALLBACK (cursor_sprite_prepare_at),
+                                   cursor_role,
+                                   0);
+        }
+
+      cursor_role->cursor_sprite = cursor_sprite;
+    }
+
+  cursor_role->hot_x = hotspot_x;
+  cursor_role->hot_y = hotspot_y;
+
+  update_cursor_sprite_texture (cursor_role);
+}
+
+MetaCursorSprite *
+meta_wayland_surface_role_cursor_get_sprite (MetaWaylandSurfaceRoleCursor *cursor_role,
+                                             gint                         *hotspot_x,
+                                             gint                         *hotspot_y)
+{
+  if (hotspot_x)
+    *hotspot_x = cursor_role->hot_x;
+  if (hotspot_y)
+    *hotspot_y = cursor_role->hot_y;
+
+  return cursor_role->cursor_sprite;
+}
+
+void
+meta_wayland_surface_role_cursor_set_renderer (MetaWaylandSurfaceRoleCursor *cursor_role,
+                                               MetaCursorRenderer           *renderer)
+{
+  if (cursor_role->cursor_renderer == renderer)
+    return;
+
+  if (renderer)
+    g_object_ref (renderer);
+  if (cursor_role->cursor_renderer)
+    g_object_unref (cursor_role->cursor_renderer);
+
+  cursor_role->cursor_renderer = renderer;
+  update_cursor_sprite_texture (cursor_role);
+}
+
+MetaCursorRenderer *
+meta_wayland_surface_role_cursor_get_renderer (MetaWaylandSurfaceRoleCursor *cursor_role)
+{
+  return cursor_role->cursor_renderer;
+}
diff --git a/src/wayland/meta-wayland-surface.h b/src/wayland/meta-wayland-surface.h
index 94ba100..0846c22 100644
--- a/src/wayland/meta-wayland-surface.h
+++ b/src/wayland/meta-wayland-surface.h
@@ -31,6 +31,7 @@
 #include "meta-wayland-types.h"
 #include "meta-surface-actor.h"
 #include "backends/meta-monitor-manager-private.h"
+#include "backends/meta-cursor-renderer.h"
 
 typedef struct _MetaWaylandPendingState MetaWaylandPendingState;
 
@@ -90,6 +91,12 @@ G_DECLARE_FINAL_TYPE (MetaWaylandSurfaceRoleDND,
                       META, WAYLAND_SURFACE_ROLE_DND,
                       MetaWaylandSurfaceRole);
 
+#define META_TYPE_WAYLAND_SURFACE_ROLE_CURSOR (meta_wayland_surface_role_cursor_get_type ())
+G_DECLARE_FINAL_TYPE (MetaWaylandSurfaceRoleCursor,
+                      meta_wayland_surface_role_cursor,
+                      META, WAYLAND_SURFACE_ROLE_CURSOR,
+                      MetaWaylandSurfaceRole);
+
 struct _MetaWaylandPendingState
 {
   /* wl_surface.attach */
@@ -252,4 +259,17 @@ void                meta_wayland_surface_queue_pending_state_frame_callbacks (Me
 
 MetaWaylandSurface * meta_wayland_surface_role_get_surface (MetaWaylandSurfaceRole *role);
 
+
+void                 meta_wayland_surface_role_cursor_set_sprite   (MetaWaylandSurfaceRoleCursor 
*cursor_role,
+                                                                    MetaCursorSprite             
*cursor_sprite,
+                                                                    gint                          hotspot_x,
+                                                                    gint                          hotspot_y);
+MetaCursorSprite *   meta_wayland_surface_role_cursor_get_sprite   (MetaWaylandSurfaceRoleCursor 
*cursor_role,
+                                                                    gint                         *hotspot_x,
+                                                                    gint                         *hotspot_y);
+void                 meta_wayland_surface_role_cursor_set_renderer (MetaWaylandSurfaceRoleCursor 
*cursor_role,
+                                                                    MetaCursorRenderer           *renderer);
+MetaCursorRenderer * meta_wayland_surface_role_cursor_get_renderer (MetaWaylandSurfaceRoleCursor 
*cursor_role);
+
+
 #endif