wayland: Mark opaque_region as dirty on hide

Otherwise if we hide and show a window we recreate a new surface,
breaking the compositor's association, but potentially not resend this
data for the new surface.
This matches what we do for input_region.

diff --git a/gdk/wayland/gdksurface-wayland.c b/gdk/wayland/gdksurface-wayland.c
index 0a02cede9194c02fa983d2f99439062d7ab38c31..21b8be7f0c62f75ab8c2bff8e49d12fbc8b70680 100644 (file)
--- a/gdk/wayland/gdksurface-wayland.c
+++ b/gdk/wayland/gdksurface-wayland.c
@@ -3004,6 +3004,7 @@ gdk_wayland_surface_hide_surface (GdkSurface *surface)
 
   impl->has_uncommitted_ack_configure = FALSE;
   impl->input_region_dirty = TRUE;
+  impl->opaque_region_dirty = TRUE;
 
   unset_transient_for_exported (surface);