Jacek Caban : win32u: Fix handling uninitialized process_layout.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 50bbaf9d5e40cfd0c36d7e8e82e33822b3df23bb
URL:    https://gitlab.winehq.org/wine/wine/-/commit/50bbaf9d5e40cfd0c36d7e8e82e3382...

Author: Jacek Caban 
Date:   Fri Aug  5 12:34:19 2022 +0200

win32u: Fix handling uninitialized process_layout.

---

dlls/win32u/sysparams.c      | 7 ++++++-
 dlls/win32u/win32u_private.h | 2 +-
 dlls/win32u/window.c         | 2 +-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/dlls/win32u/sysparams.c b/dlls/win32u/sysparams.c
index 201004e1447..454c4702612 100644
--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -375,7 +375,7 @@ union sysparam_all_entry

static UINT system_dpi;
 static RECT work_area;
-DWORD process_layout = ~0u;
+static DWORD process_layout = ~0u;

static HDC display_dc;
 static pthread_mutex_t display_dc_lock = PTHREAD_MUTEX_INITIALIZER;
@@ -1631,6 +1631,11 @@ DPI_AWARENESS get_thread_dpi_awareness(void)
     }
 }

+DWORD get_process_layout(void)
+{
+    return process_layout == ~0u ? 0 : process_layout;
+}
+
 /**********************************************************************
  *              get_thread_dpi
  */
diff --git a/dlls/win32u/win32u_private.h b/dlls/win32u/win32u_private.h
index a0bc1d62882..e1d163ea8eb 100644
--- a/dlls/win32u/win32u_private.h
+++ b/dlls/win32u/win32u_private.h
@@ -326,7 +326,6 @@ extern void track_scroll_bar( HWND hwnd, int scrollbar, POINT pt ) DECLSPEC_HIDD

/* sysparams.c */
 extern BOOL enable_thunk_lock DECLSPEC_HIDDEN;
-extern DWORD process_layout DECLSPEC_HIDDEN;
 extern HBRUSH get_55aa_brush(void) DECLSPEC_HIDDEN;
 extern DWORD get_dialog_base_units(void) DECLSPEC_HIDDEN;
 extern LONG get_char_dimensions( HDC hdc, TEXTMETRICW *metric, LONG *height ) DECLSPEC_HIDDEN;
@@ -335,6 +334,7 @@ extern UINT get_monitor_dpi( HMONITOR monitor ) DECLSPEC_HIDDEN;
 extern BOOL get_monitor_info( HMONITOR handle, MONITORINFO *info ) DECLSPEC_HIDDEN;
 extern UINT get_win_monitor_dpi( HWND hwnd ) DECLSPEC_HIDDEN;
 extern RECT get_primary_monitor_rect( UINT dpi ) DECLSPEC_HIDDEN;
+extern DWORD get_process_layout(void) DECLSPEC_HIDDEN;
 extern COLORREF get_sys_color( int index ) DECLSPEC_HIDDEN;
 extern HBRUSH get_sys_color_brush( unsigned int index ) DECLSPEC_HIDDEN;
 extern HPEN get_sys_color_pen( unsigned int index ) DECLSPEC_HIDDEN;
diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index b4a65b883f3..d9c771e5d3d 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -5094,7 +5094,7 @@ HWND WINAPI NtUserCreateWindowEx( DWORD ex_style, UNICODE_STRING *class_name,
             (class_name->Length != sizeof(messageW) ||
              wcsnicmp( class_name->Buffer, messageW, ARRAYSIZE(messageW) )))
         {
-            if (process_layout & LAYOUT_RTL) cs.dwExStyle |= WS_EX_LAYOUTRTL;
+            if (get_process_layout() & LAYOUT_RTL) cs.dwExStyle |= WS_EX_LAYOUTRTL;
             parent = get_desktop_window();
         }
     }