From: Kevin Ollivier <kevino@theolliviers.com>
Date: Wed, 22 Nov 2006 19:54:38 +0000 (+0000)
Subject: Avoid crash when trying to access m_window from wxScreenDC.
X-Git-Url: https://git.saurik.com/wxWidgets.git/commitdiff_plain/90b0f5fced341db319fad931ae34eb1961e23f24

Avoid crash when trying to access m_window from wxScreenDC.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43605 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---

diff --git a/src/mac/carbon/dcclient.cpp b/src/mac/carbon/dcclient.cpp
index 9fcd763bb8..27164c2c9e 100644
--- a/src/mac/carbon/dcclient.cpp
+++ b/src/mac/carbon/dcclient.cpp
@@ -191,6 +191,11 @@ void wxWindowDC::DoGetSize( int* width, int* height ) const
 
 wxBitmap wxWindowDC::DoGetAsBitmap(const wxRect *subrect) const
 {
+    // wxScreenDC is derived from wxWindowDC, so a screen dc will
+    // call this method when a Blit is performed with it as a source.
+    if (!m_window)
+        return wxNullBitmap;
+        
     ControlRef handle = (ControlRef) m_window->GetHandle();
     if ( !handle )
         return wxNullBitmap;