[PATCH 0/1] MR7026: win32u: Always update the surface region when the surface changes.

[Rémi Bernon (＠rbernon)]

Instead of reapplying the old shape, which not only includes the window
shape but also the old clipping and visible areas that can change
independently.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57551

[PATCH 1/1] win32u: Always update the surface region when the surface changes.

[Rémi Bernon]

From: Rémi Bernon

Instead of reapplying the old shape, which not only includes the window
shape but also the old clipping and visible areas that can change
independently.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57551
---
 dlls/win32u/window.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index 4855555d926..d8974501adb 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -2066,7 +2066,7 @@ static BOOL apply_window_pos( HWND hwnd, HWND insert_after, UINT swp_flags, stru
     old_surface = win->surface;
     if (old_surface != new_surface)
     {
-        if (old_surface && new_surface) window_surface_set_shape( new_surface, old_surface->shape_region );
+        needs_update = TRUE; /* force refreshing the window surface shape */
         swp_flags |= SWP_FRAMECHANGED;  /* force refreshing non-client area */
     }

@@ -2112,7 +2112,7 @@ static BOOL apply_window_pos( HWND hwnd, HWND insert_after, UINT swp_flags, stru
             win->rects        = *new_rects;
             if ((win->surface = new_surface)) window_surface_add_ref( win->surface );
             surface_win       = wine_server_ptr_handle( reply->surface_win );
-            needs_update      = reply->needs_update;
+            if (!needs_update) needs_update = reply->needs_update;
             if (get_window_long( win->parent, GWL_EXSTYLE ) & WS_EX_LAYOUTRTL)
             {
                 RECT client = {0};

[darkblaze69 (＠darkblaze69)]

This has a side effect, in both GNOME and KDE at least without decorations (without vcrun2017) on resizing out the window it isn't refreshed and partially stays black:

![Screenshot_From_2024-12-16_20-11-30](/uploads/70061b5d0fdce3f9c3f40c0c367301a8/Screenshot_From_2024-12-16_20-11-30.png){width=80%}

With decorations (vcrun2017) I don't see this effect.