add native OpenGL debug output for dbgutil builds

depends on support of ARB_debug_output

Change-Id: I8c96284377e2cb9d2ee06ddd4101c1de4d0fbe9f

chart2/source/view/main/DummyXShape.cxx

@@ -1140,6 +1140,21 @@ int oglErrorHandler( Display* /*dpy*/, XErrorEvent* /*evnt*/ )
 
 #endif
 
+#if DBG_UTIL
+
+namespace {
+
+void debug_callback(GLenum source, GLenum type, GLuint id,
+        GLenum severity, GLsizei , const GLchar* message, void* )
+{
+    SAL_WARN("chart2.opengl", "OpenGL debug message: source: " << source << ", type: "
+            << type << ", id: " << id << ", severity: " << severity << " with message: " << message);
+}
+
+}
+
+#endif
+
 bool DummyChart::initOpengl()
 {
     SAL_WARN("chart2.opengl", "DummyChart::initOpengl----start");
@@ -1253,6 +1268,16 @@ bool DummyChart::initOpengl()
 
     m_GLRender.InitOpenGL(GLWin);
 
+#if DBG_UTIL
+    // only enable debug output in dbgutil build
+    if( GLEW_ARB_debug_output )
+    {
+        glEnable(GL_DEBUG_OUTPUT);
+        glDebugMessageCallback(&debug_callback, NULL);
+    }
+
+#endif
+
     glEnable(GL_TEXTURE_2D);
     glEnable(GL_CULL_FACE);
     glCullFace(GL_BACK);