Alexandre Julliard : user32: Invalid DCEs when the window surface changes.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ddf41276e145896664834828389d1ff6f1567f8c
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=ddf41276e145896664834828389d1ff6f1567f8c

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Mon Oct  1 13:17:53 2012 +0200

user32: Invalid DCEs when the window surface changes.

---

 dlls/user32/winpos.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/dlls/user32/winpos.c b/dlls/user32/winpos.c
index 0593140..c866a5d 100644
--- a/dlls/user32/winpos.c
+++ b/dlls/user32/winpos.c
@@ -2017,9 +2017,13 @@ BOOL set_window_pos( HWND hwnd, HWND insert_after, UINT swp_flags,
     }
     SERVER_END_REQ;
 
-    if (ret && (((swp_flags & SWP_AGG_NOPOSCHANGE) != SWP_AGG_NOPOSCHANGE) ||
-                (swp_flags & (SWP_HIDEWINDOW | SWP_SHOWWINDOW | SWP_STATECHANGED | SWP_FRAMECHANGED))))
-        invalidate_dce( win, &old_window_rect );
+    if (ret)
+    {
+        if (old_surface != new_surface ||
+            ((swp_flags & SWP_AGG_NOPOSCHANGE) != SWP_AGG_NOPOSCHANGE) ||
+            (swp_flags & (SWP_HIDEWINDOW | SWP_SHOWWINDOW | SWP_STATECHANGED | SWP_FRAMECHANGED)))
+            invalidate_dce( win, &old_window_rect );
+    }
 
     WIN_ReleasePtr( win );