Trying to use JOGL's curve TextRenderer

gistfile1.java

package experiments;

import static javax.media.opengl.GL.GL_COLOR_BUFFER_BIT;
import static javax.media.opengl.GL.GL_DEPTH_BUFFER_BIT;

import java.awt.BorderLayout;
import java.awt.Container;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;

import javax.media.opengl.GL4;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import com.jogamp.graph.curve.opengl.RenderState;
import com.jogamp.graph.curve.opengl.TextRenderer;
import com.jogamp.graph.font.Font;
import com.jogamp.graph.font.FontFactory;
import com.jogamp.graph.geom.opengl.SVertex;
import com.jogamp.newt.awt.NewtCanvasAWT;
import com.jogamp.newt.opengl.GLWindow;
import com.jogamp.opengl.util.Animator;
import com.jogamp.opengl.util.glsl.ShaderState;


public class TextRendererTest implements GLEventListener{
	
	private ShaderState shaderState;
	private RenderState renderState;
	private TextRenderer textRenderer;
	private float[] position;
	private int[] texSize;
	private int fontSize;
	private Font font;

	@Override
	public void display(GLAutoDrawable glad) {
		render(glad);
	}

	// Render a triangle
	private void render(GLAutoDrawable glad) {
		GL4 gl = glad.getGL().getGL4();
		gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
		
		shaderState.useProgram(gl, true);
		textRenderer.resetModelview(null);
		textRenderer.translate(gl, 10, 10, 0);
		textRenderer.drawString3D(gl, font, "HELLO WORLD", position, fontSize, texSize);
		shaderState.useProgram(gl, false);
	}

	@Override
	public void reshape(GLAutoDrawable glad, int x, int y, int width, int height){
		System.out.println("Reshape issued by "+Thread.currentThread()+": "+width+"x"+height);
	}

	@Override
	public void init(GLAutoDrawable glad) {
		GL4 gl = glad.getGL().getGL4();
		
		shaderState = new ShaderState();
		renderState = RenderState.createRenderState(shaderState, SVertex.factory());
		textRenderer = TextRenderer.create(renderState, 0);
		textRenderer.init(gl);
		textRenderer.setAlpha(gl, 1f);
		textRenderer.setColorStatic(gl, 1f, 1f, 1f);
		
		position = new float[]{ 0f, 0f, 0f };
		texSize = new int[] { 0 };
		fontSize = 38;
		try {
			font = FontFactory.get(FontFactory.UBUNTU).getDefault();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	@Override
	public void dispose(GLAutoDrawable glad) {
	}

	public static void main(String args[]) throws InterruptedException, InvocationTargetException {
		GLCapabilities glCaps = new GLCapabilities(null);
		final GLWindow glWindow = GLWindow.create(glCaps);
		glWindow.setTitle("Fullscreen Test");
		glWindow.addGLEventListener(new TextRendererTest());
		final Animator animator = new Animator(glWindow);
		animator.start();
		final NewtCanvasAWT newtCanvasAWT = new NewtCanvasAWT(glWindow);
		final Container container = new Container();
		container.setLayout(new BorderLayout());
		container.add(newtCanvasAWT, BorderLayout.CENTER);
        final JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        panel.add(container, BorderLayout.CENTER);
        final JFrame frame = new JFrame("JOGL Text Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(panel);
        SwingUtilities.invokeAndWait(new Runnable() {
           public void run() {
        	   frame.setSize(640, 480);
        	   frame.validate();
        	   frame.setVisible(true);
           }
        });
	}
}