Resolves: tdf#107372 set opengl context when using opengl functions

even if they are teardown ones

Change-Id: Ie222d3ffb2b555c0013d7346552d3fc76ec87d9b
Reviewed-on: https://gerrit.libreoffice.org/36948Tested-by: Jenkins <ci@libreoffice.org>
Tested-by: Julien Nabet <serval2412@yahoo.fr>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

chart2/source/view/charttypes/GL3DBarChart.cxx

@@ -592,8 +592,13 @@ GL3DBarChart::~GL3DBarChart()
 
     joinRenderThread();
 
-    if(mbValidContext)
+    if (mbValidContext)
+    {
         mpWindow->setRenderer(nullptr);
+        mpWindow->getContext().makeCurrent();
+        mpRenderer.reset();
+        mpWindow->getContext().resetCurrent();
+    }
 }
 
 void GL3DBarChart::create3DShapes(const std::vector<std::unique_ptr<VDataSeries> >& rDataSeriesContainer,
@@ -1123,6 +1128,9 @@ void GL3DBarChart::contextDestroyed()
 {
     SharedResourceAccess aResGuard(maCond1, maCond2);
     osl::MutexGuard aGuard(maMutex);
+    mpWindow->getContext().makeCurrent();
+    mpRenderer.reset();
+    mpWindow->getContext().resetCurrent();
     mbValidContext = false;
 }