winex11: Use SetWindowPos to invalidate DCEs when changing the pixel format.

dlls/user32/user32.spec

@@ -788,4 +788,3 @@
 # Wine dll separation hacks, these will go away, don't use them
 #
 @ cdecl HOOK_CallHooks(long long long long long)
-@ cdecl WIN_invalidate_dce(long ptr) invalidate_dce

dlls/winex11.drv/window.c

@@ -496,7 +496,10 @@ done:
     wine_tsx11_lock();
     XFlush( display );
     wine_tsx11_unlock();
-    WIN_invalidate_dce( hwnd, NULL );
+    /* force DCE invalidation */
+    SetWindowPos( hwnd, 0, 0, 0, 0, 0,
+                  SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOSIZE | SWP_NOMOVE |
+                  SWP_NOREDRAW | SWP_NOSENDCHANGING | SWP_STATECHANGED);
     return TRUE;
 }
 
@@ -559,6 +562,7 @@ static void sync_gl_drawable(Display *display, struct x11drv_win_data *data)
 
     XFreePixmap(display, data->pixmap);
     destroy_glxpixmap(display, data->gl_drawable);
+    TRACE( "Recreated GL drawable %lx to replace %lx\n", glxp, data->gl_drawable );
 
     data->pixmap = pix;
     data->gl_drawable = glxp;

dlls/winex11.drv/x11drv.h

@@ -774,7 +774,6 @@ extern void X11DRV_ForceXIMReset(HWND hwnd);
 
 /* FIXME: private functions imported from user32 */
 extern LRESULT HOOK_CallHooks( INT id, INT code, WPARAM wparam, LPARAM lparam, BOOL unicode );
-extern void WIN_invalidate_dce( HWND hwnd, const RECT *rect );
 
 #define XEMBED_MAPPED  (1 << 0)