From 83443ae2ffacb7801f469f234acc9136e5ec654d Mon Sep 17 00:00:00 2001
From: Magne Sjaastad <magne.sjaastad@ceetronsolutions.com>
Date: Thu, 22 Aug 2024 11:49:06 +0200
Subject: [PATCH] Guard use of empty OpenGL context

---
 .../ModelVisualization/RivWellSpheresPartMgr.cpp      | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/ApplicationLibCode/ModelVisualization/RivWellSpheresPartMgr.cpp b/ApplicationLibCode/ModelVisualization/RivWellSpheresPartMgr.cpp
index 58c43d47ed..9e04c755fb 100644
--- a/ApplicationLibCode/ModelVisualization/RivWellSpheresPartMgr.cpp
+++ b/ApplicationLibCode/ModelVisualization/RivWellSpheresPartMgr.cpp
@@ -178,11 +178,14 @@ cvf::ref<cvf::Part> RivWellSpheresPartMgr::createPart( std::vector<std::pair<cvf
     {
         if ( m_rimReservoirView->viewer() )
         {
-            cvf::ref<cvf::OpenGLContext> oglContext      = m_rimReservoirView->viewer()->cvfOpenGLContext();
-            cvf::OpenGLResourceManager*  resourceManager = oglContext->resourceManager();
-            cvf::ref<cvf::ShaderProgram> vectorProgram   = resourceManager->getLinkedVectorDrawerShaderProgram( oglContext.p() );
+            cvf::ref<cvf::OpenGLContext> oglContext = m_rimReservoirView->viewer()->cvfOpenGLContext();
+            if ( oglContext.notNull() )
+            {
+                cvf::OpenGLResourceManager*  resourceManager = oglContext->resourceManager();
+                cvf::ref<cvf::ShaderProgram> vectorProgram   = resourceManager->getLinkedVectorDrawerShaderProgram( oglContext.p() );
 
-            eff->setShaderProgram( vectorProgram.p() );
+                eff->setShaderProgram( vectorProgram.p() );
+            }
         }
     }