[PATCH 1/1] win32u: Fix deadlock when setting hdc_src to the window's self DC.

[Zhao Yi]

From: Zhao Yi <[e-mail]>

Signed-off-by: Zhao Yi <[e-mail]>
---
 dlls/win32u/window.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index fc129df0785..350c9092de8 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -2678,7 +2678,7 @@ BOOL WINAPI NtUserUpdateLayeredWindow( HWND hwnd, HDC hdc_dst, const POINT *pts_
     apply_window_pos( hwnd, 0, swp_flags, surface, &new_rects, NULL );
     if (!surface) return FALSE;
 
-    if (!hdc_src || surface == &dummy_surface)
+    if (!hdc_src || surface == &dummy_surface || (NtUserWindowFromDC( hdc_src ) == hwnd))
     {
         user_driver->pUpdateLayeredWindow( hwnd, source_alpha, flags );
         ret = TRUE;
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/10324