--- a/OrthancStone/Sources/Scene2D/Internals/OpenGLAdvancedPolylineRenderer.cpp	Fri Oct 30 11:07:38 2020 +0100
+++ b/OrthancStone/Sources/Scene2D/Internals/OpenGLAdvancedPolylineRenderer.cpp	Fri Oct 30 16:26:39 2020 +0100
@@ -35,7 +35,7 @@
 
       if (data_.get() == NULL)
       {
-        throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
       }
     }
 
@@ -48,5 +48,16 @@
     {
       LoadLayer(layer);
     }
+
+
+    void OpenGLAdvancedPolylineRenderer::Render(const AffineTransform2D& transform,
+                                                unsigned int canvasWidth,
+                                                unsigned int canvasHeight)
+    {
+      if (!context_.IsContextLost())
+      {
+        program_.Apply(*data_, transform, canvasWidth, canvasHeight, true, true);
+      }
+    }
   }
 }