[PATCH 4/4] win32u: Update client surfaces starting from toplevel window.

[Rémi Bernon]

From: Rémi Bernon

In apply_window_pos, to notify any parent or children and let them make
the necessary changes for offscreen rendering.
---
 dlls/win32u/window.c | 34 +++++-----------------------------
 1 file changed, 5 insertions(+), 29 deletions(-)

diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index 340ab31e857..fa717c00d09 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -1592,24 +1592,6 @@ int get_window_pixel_format( HWND hwnd )
     return ret;
 }

-static int window_has_client_surface( HWND hwnd )
-{
-    struct client_surface *surface;
-    WND *win = get_win_ptr( hwnd );
-    BOOL ret;
-
-    if (!win || win == WND_DESKTOP || win == WND_OTHER_PROCESS) return FALSE;
-    ret = win->pixel_format || win->current_drawable;
-    release_win_ptr( win );
-    if (ret) return TRUE;
-
-    pthread_mutex_lock( &surfaces_lock );
-    LIST_FOR_EACH_ENTRY( surface, &client_surfaces, struct client_surface, entry )
-        if ((ret = surface->hwnd == hwnd)) break;
-    pthread_mutex_unlock( &surfaces_lock );
-    return ret;
-}
-
 /***********************************************************************
  *           NtUserGetProp   (win32u.@)
  *
@@ -2126,20 +2108,16 @@ static struct window_surface *get_window_surface( HWND hwnd, UINT swp_flags, BOO
     return new_surface;
 }

-static void update_children_window_state( HWND hwnd )
+static void update_window_client_surfaces( HWND hwnd )
 {
     HWND *children;
     int i;

if (!(children = list_window_children( hwnd ))) return;
-
-    for (i = 0; children[i]; i++)
-    {
-        if (!window_has_client_surface( children[i] )) continue;
-        update_window_state( children[i] );
-    }
-
+    for (i = 0; children[i]; i++) update_window_client_surfaces( children[i] );
     free( children );
+
+    update_client_surfaces( hwnd );
 }

static HICON get_icon_info( HICON icon, ICONINFO *ii )
@@ -2345,9 +2323,7 @@ static BOOL apply_window_pos( HWND hwnd, HWND insert_after, UINT swp_flags, stru

user_driver->pWindowPosChanged( hwnd, insert_after, owner_hint, swp_flags, &monitor_rects,
                                         get_driver_window_surface( new_surface, raw_dpi ) );
-        update_client_surfaces( hwnd );
-
-        update_children_window_state( hwnd );
+        update_window_client_surfaces( surface_win );
     }

return ret;