Rémi Bernon : win32u: Update the display cache when virtual desktop mode changes.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a0cd5e053bbd9ca9f124186c7da27605026ad7e5
URL:    https://gitlab.winehq.org/wine/wine/-/commit/a0cd5e053bbd9ca9f124186c7da2760...

Author: Rémi Bernon <rbernon(a)codeweavers.com>
Date:   Thu Jun 29 12:47:05 2023 +0200

win32u: Update the display cache when virtual desktop mode changes.

We update the cache in NtUserCreateDesktopEx, as it may change existing
thread desktop flags, but we need to do it as well when a new desktop is
created while still detached, then attached to a thread through
NtUserSetThreadDesktop.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55146

---

 dlls/win32u/winstation.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/win32u/winstation.c b/dlls/win32u/winstation.c
index 9b97a4b4076..f99bef2bf11 100644
--- a/dlls/win32u/winstation.c
+++ b/dlls/win32u/winstation.c
@@ -248,7 +248,7 @@ HDESK WINAPI NtUserGetThreadDesktop( DWORD thread )
  */
 BOOL WINAPI NtUserSetThreadDesktop( HDESK handle )
 {
-    BOOL ret;
+    BOOL ret, was_virtual_desktop = is_virtual_desktop();
 
     SERVER_START_REQ( set_thread_desktop )
     {
@@ -264,6 +264,7 @@ BOOL WINAPI NtUserSetThreadDesktop( HDESK handle )
         thread_info->client_info.top_window = 0;
         thread_info->client_info.msg_window = 0;
         if (key_state_info) key_state_info->time = 0;
+        if (was_virtual_desktop != is_virtual_desktop()) update_display_cache( TRUE );
     }
     return ret;
 }