[PATCH 0/1] MR6357: win32u: Only allow a custom visible rect for toplevel windows.

[Rémi Bernon (＠rbernon)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57102
Fixes: cb1c03b926ca01619be02f835f382c1dd7d4a478

[PATCH 1/1] win32u: Only allow a custom visible rect for toplevel windows.

[Rémi Bernon]

From: Rémi Bernon

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57102
Fixes: cb1c03b926ca01619be02f835f382c1dd7d4a478
---
 dlls/win32u/window.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index c53e4f8e0e8..35710f862d5 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -1894,7 +1894,7 @@ static BOOL get_default_window_surface( HWND hwnd, const RECT *surface_rect, str
 static struct window_surface *create_window_surface( HWND hwnd, UINT swp_flags, BOOL create_layered,
                                                      struct window_rects *rects, RECT *surface_rect )
 {
-    BOOL shaped, needs_surface, create_opaque, is_layered;
+    BOOL shaped, needs_surface, create_opaque, is_layered, is_child;
     HWND parent = NtUserGetAncestor( hwnd, GA_PARENT );
     struct window_surface *new_surface;
     UINT style, ex_style;
@@ -1903,18 +1903,19 @@ static struct window_surface *create_window_surface( HWND hwnd, UINT swp_flags,

style = NtUserGetWindowLongW( hwnd, GWL_STYLE );
     ex_style = NtUserGetWindowLongW( hwnd, GWL_EXSTYLE );
+    is_child = parent && parent != NtUserGetDesktopWindow();

if (get_window_region( hwnd, FALSE, &shape, &dummy )) shaped = FALSE;
     else if ((shaped = !!shape)) NtGdiDeleteObjectApp( shape );

rects->visible = rects->window;
     if (!user_driver->pWindowPosChanging( hwnd, swp_flags, shaped, rects )) needs_surface = FALSE;
-    else if (parent && parent != NtUserGetDesktopWindow()) needs_surface = FALSE;
+    else if (is_child) needs_surface = FALSE;
     else if (swp_flags & SWP_HIDEWINDOW) needs_surface = FALSE;
     else if (swp_flags & SWP_SHOWWINDOW) needs_surface = TRUE;
     else needs_surface = !!(style & WS_VISIBLE);

-    rects->visible = get_visible_rect( hwnd, shaped, style, ex_style, rects );
+    if (!is_child) rects->visible = get_visible_rect( hwnd, shaped, style, ex_style, rects );
     if (!get_surface_rect( &rects->visible, surface_rect )) needs_surface = FALSE;
     if (!get_default_window_surface( hwnd, surface_rect, &new_surface )) return NULL;