winex11: Disable client-side rendering for OpenGL windows.

dlls/winex11.drv/opengl.c

@@ -1135,6 +1135,15 @@ static void release_gl_drawable( struct gl_drawable *gl )
     if (gl) LeaveCriticalSection( &context_section );
 }
 
+BOOL has_gl_drawable( HWND hwnd )
+{
+    struct gl_drawable *gl;
+
+    gl = get_gl_drawable( hwnd, 0 );
+    release_gl_drawable( gl );
+    return gl != NULL;
+}
+
 static GLXContext create_glxcontext(Display *display, struct wgl_context *context, GLXContext shareList)
 {
     GLXContext ctx;
@@ -3342,6 +3351,11 @@ BOOL set_win_format( HWND hwnd, XID fbconfig_id )
     return FALSE;
 }
 
+BOOL has_gl_drawable( HWND hwnd )
+{
+    return FALSE;
+}
+
 void sync_gl_drawable( HWND hwnd, const RECT *visible_rect, const RECT *client_rect )
 {
 }

dlls/winex11.drv/window.c

@@ -2051,6 +2051,7 @@ void CDECL X11DRV_WindowPosChanging( HWND hwnd, HWND insert_after, UINT swp_flag
     if (!data->whole_window) return;
     if (swp_flags & SWP_HIDEWINDOW) return;
     if (data->whole_window == root_window) return;
+    if (has_gl_drawable( hwnd )) return;
     if (!client_side_graphics) return;
 
     surface_rect = get_surface_rect( visible_rect );

dlls/winex11.drv/x11drv.h

@@ -558,6 +558,7 @@ extern Window X11DRV_get_whole_window( HWND hwnd ) DECLSPEC_HIDDEN;
 extern XIC X11DRV_get_ic( HWND hwnd ) DECLSPEC_HIDDEN;
 
 extern BOOL set_win_format( HWND hwnd, XID fbconfig_id ) DECLSPEC_HIDDEN;
+extern BOOL has_gl_drawable( HWND hwnd ) DECLSPEC_HIDDEN;
 extern void sync_gl_drawable( HWND hwnd, const RECT *visible_rect, const RECT *client_rect ) DECLSPEC_HIDDEN;
 extern void destroy_gl_drawable( HWND hwnd ) DECLSPEC_HIDDEN;