[gtk/present-toplevel-2] x11: Stop using gdk_surface_set_opacity

[Matthias Clasen <matthiasc src gnome org>]

commit 44b0cae07700099290a5266f227d72128b185769
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Mar 4 09:38:27 2020 -0800

    x11: Stop using gdk_surface_set_opacity
    
    We can just use the backend api directly.

 gdk/x11/gdkdrag-x11.c    | 2 +-
 gdk/x11/gdkprivate-x11.h | 2 ++
 gdk/x11/gdksurface-x11.c | 4 ++--
 3 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/gdk/x11/gdkdrag-x11.c b/gdk/x11/gdkdrag-x11.c
index 8ac9bd782b..9f2327b813 100644
--- a/gdk/x11/gdkdrag-x11.c
+++ b/gdk/x11/gdkdrag-x11.c
@@ -1786,7 +1786,7 @@ gdk_drag_anim_timeout (gpointer data)
                         (drag->start_x - drag->last_x) * t,
                         (drag->last_y - drag->hot_y) +
                         (drag->start_y - drag->last_y) * t);
-  gdk_surface_set_opacity (drag->drag_surface, 1.0 - f);
+  gdk_x11_surface_set_opacity (drag->drag_surface, 1.0 - f);
 
   return G_SOURCE_CONTINUE;
 }
diff --git a/gdk/x11/gdkprivate-x11.h b/gdk/x11/gdkprivate-x11.h
index d1b5e4c3e3..b97913de6d 100644
--- a/gdk/x11/gdkprivate-x11.h
+++ b/gdk/x11/gdkprivate-x11.h
@@ -231,6 +231,8 @@ void gdk_x11_surface_get_root_coords (GdkSurface *surface,
                                       gint       *root_y);
 
 void gdk_x11_surface_raise (GdkSurface *surface);
+void gdk_x11_surface_set_opacity (GdkSurface *surface,
+                                  double      opacity);
 
 GdkGrabStatus _gdk_x11_convert_grab_status (gint status);
 
diff --git a/gdk/x11/gdksurface-x11.c b/gdk/x11/gdksurface-x11.c
index b7099cb522..f5ed52895c 100644
--- a/gdk/x11/gdksurface-x11.c
+++ b/gdk/x11/gdksurface-x11.c
@@ -4450,9 +4450,9 @@ gdk_x11_surface_beep (GdkSurface *surface)
   return FALSE;
 }
 
-static void
+void
 gdk_x11_surface_set_opacity (GdkSurface *surface,
-                           gdouble    opacity)
+                            double      opacity)
 {
   GdkDisplay *display;
   gulong cardinal;