From a42cb0ef8c4c129205447e67404117de808557fa Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Mon, 9 May 2016 18:00:34 +0200
Subject: [PATCH] OpenGL GAL: Set context in destructor when possible (under
 Linux the window has to be visible).

---
 common/gal/opengl/opengl_gal.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/common/gal/opengl/opengl_gal.cpp b/common/gal/opengl/opengl_gal.cpp
index 5a3a41b3d8..73b1b4f805 100644
--- a/common/gal/opengl/opengl_gal.cpp
+++ b/common/gal/opengl/opengl_gal.cpp
@@ -130,8 +130,12 @@ OPENGL_GAL::~OPENGL_GAL()
     gluDeleteTess( tesselator );
     ClearCache();
 
-    if( IsShown() )
+#ifdef __LINUX__
+    if( IsShownOnScreen() )
         SetCurrent( *OPENGL_GAL::glContext );
+#else
+    SetCurrent( *OPENGL_GAL::glContext );
+#endif
 
     glFlush();