From 6958972a5227c800322cf972787983c899bbb798 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sun, 8 Mar 2015 19:12:31 +0100
Subject: [PATCH] set cache context when off-screen rendering

---
 src/Gui/View3DInventorViewer.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Gui/View3DInventorViewer.cpp b/src/Gui/View3DInventorViewer.cpp
index e970d84e6b..2d6d532f15 100644
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -1246,6 +1246,10 @@ void View3DInventorViewer::renderToFramebuffer(QGLFramebufferObject* fbo)
     glDepthRange(0.1,1.0);
 
     SoGLRenderAction gl(SbViewportRegion(width, height));
+    // When creating a new GL render action we have to copy over the cache context id
+    // For further details see init().
+    uint32_t id = this->getSoRenderManager()->getGLRenderAction()->getCacheContext();
+    gl.setCacheContext(id);
     gl.setTransparencyType(SoGLRenderAction::SORTED_OBJECT_SORTED_TRIANGLE_BLEND);
     gl.apply(this->backgroundroot);
     gl.apply(this->getSoRenderManager()->getSceneGraph());