[PATCH v2 1/1] winex11: Only erase the desktop window pixels on expose events.

[Rémi Bernon]

From: Rémi Bernon

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57665
---
 dlls/winex11.drv/event.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/winex11.drv/event.c b/dlls/winex11.drv/event.c
index 428dcb7b8b7..e5617d3ac11 100644
--- a/dlls/winex11.drv/event.c
+++ b/dlls/winex11.drv/event.c
@@ -968,7 +968,7 @@ static BOOL X11DRV_Expose( HWND hwnd, XEvent *xev )
     RECT rect, abs_rect;
     POINT pos;
     struct x11drv_win_data *data;
-    UINT flags = RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN;
+    UINT flags = RDW_INVALIDATE | RDW_FRAME | RDW_ALLCHILDREN;

TRACE( "win %p (%lx) %d,%d %dx%d\n",
            hwnd, event->window, event->x, event->y, event->width, event->height );
@@ -1008,6 +1008,7 @@ static BOOL X11DRV_Expose( HWND hwnd, XEvent *xev )

release_win_data( data );

+    if (hwnd == NtUserGetDesktopWindow()) flags |= RDW_ERASE;
     NtUserExposeWindowSurface( hwnd, flags, &rect, NtUserGetWinMonitorDpi( hwnd, MDT_RAW_DPI ) );
     return TRUE;
 }