X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/888dde65f43d5f57e8fb2028b27191cca1741403..a6fd73d33ac80632981dee1c0be669f20ba765b5:/src/msw/dcmemory.cpp

diff --git a/src/msw/dcmemory.cpp b/src/msw/dcmemory.cpp
index 37605f4750..d399b5157b 100644
--- a/src/msw/dcmemory.cpp
+++ b/src/msw/dcmemory.cpp
@@ -80,9 +80,9 @@ void wxMemoryDCImpl::Init()
 
 bool wxMemoryDCImpl::CreateCompatible(wxDC *dc)
 {
-    wxDCImpl *impl = dc->GetImpl();
+    wxDCImpl *impl = dc ? dc->GetImpl() : NULL ;
     wxMSWDCImpl *msw_impl = wxDynamicCast( impl, wxMSWDCImpl );
-    if (!msw_impl)
+    if ( dc && !msw_impl)
     {
         m_ok = false;
         return false;
@@ -106,16 +106,14 @@ void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
         ::SelectObject(GetHdc(), (HBITMAP) m_oldBitmap);
         if ( m_selectedBitmap.Ok() )
         {
-#ifdef __WXDEBUG__
             m_selectedBitmap.SetSelectedInto(NULL);
-#endif
             m_selectedBitmap = wxNullBitmap;
         }
     }
 
     // check for whether the bitmap is already selected into a device context
     wxASSERT_MSG( !bitmap.GetSelectedInto() ||
-                  (bitmap.GetSelectedInto() == this),
+                  (bitmap.GetSelectedInto() == GetOwner()),
                   wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );
 
     m_selectedBitmap = bitmap;
@@ -123,9 +121,7 @@ void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
     if ( !hBmp )
         return;
 
-#ifdef __WXDEBUG__
-    m_selectedBitmap.SetSelectedInto(this);
-#endif
+    m_selectedBitmap.SetSelectedInto(GetOwner());
     hBmp = (WXHBITMAP)::SelectObject(GetHdc(), (HBITMAP)hBmp);
 
     if ( !hBmp )