From 8c42e26cde0ce14e8fe3b62c260ac83f8d846b08 Mon Sep 17 00:00:00 2001
From: Matthew Flatt <mflatt@racket-lang.org>
Date: Fri, 21 Dec 2007 02:54:19 +0000
Subject: [PATCH] give up on GC blit if DC is in CG mode

svn: r8088
---
 src/wxmac/src/mac/wx_dccan2.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/wxmac/src/mac/wx_dccan2.cc b/src/wxmac/src/mac/wx_dccan2.cc
index 8a8bbe60e4..bd10349114 100644
--- a/src/wxmac/src/mac/wx_dccan2.cc
+++ b/src/wxmac/src/mac/wx_dccan2.cc
@@ -1263,6 +1263,11 @@ Bool wxCanvasDC::GCBlit(double xdest, double ydest, double width, double height,
   CGrafPtr theMacGrafPort;
   RgnHandle rgn;
 
+  if (cMacDC->GetCG(TRUE)) {
+    /* The dc is in CG mode. Too bad; just give up. */
+    return FALSE;
+  }
+
   ::GetGWorld(&savep, &savegd);  
 
   theMacGrafPort = cMacDC->macGrafPort();