From c4a269b32a4347f8d000cb52583273cf34b600d8 Mon Sep 17 00:00:00 2001
From: BearOso <bearoso@gmail.com>
Date: Wed, 4 Nov 2020 12:03:28 -0600
Subject: [PATCH] Gtk: OpenGL: Try to ensure window is mapped.

---
 gtk/src/gtk_display_driver_opengl.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gtk/src/gtk_display_driver_opengl.cpp b/gtk/src/gtk_display_driver_opengl.cpp
index ec48e159..245cdfef 100644
--- a/gtk/src/gtk_display_driver_opengl.cpp
+++ b/gtk/src/gtk_display_driver_opengl.cpp
@@ -479,6 +479,8 @@ bool S9xOpenGLDisplayDriver::create_context()
 #ifdef GDK_WINDOWING_X11
     if (GDK_IS_X11_WINDOW(gdk_window))
     {
+        gdk_window_ensure_native(gdk_window);
+        gdk_display_sync(gdk_display);
         if (!glx.attach(gdk_x11_display_get_xdisplay(gdk_display), gdk_x11_window_get_xid(gdk_window)))
             return false;
         context = &glx;