/**
 * (C) Copyright Softwareschneiderei GmbH, Karlsruhe, Germany
 * @author mmv
 * @since 02.02.2009
 */
package com.schneide.ramses.demo;

import java.awt.Dimension;

import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLJPanel;
import javax.swing.JFrame;
import javax.swing.WindowConstants;

import com.sun.opengl.util.Animator;
import com.sun.opengl.util.j2d.TextRenderer;

public class TextRendererDisplayListDemo extends JFrame implements GLEventListener {

    private static final long serialVersionUID = -57945727447508397L;
    private GLJPanel glpanel;
    private Animator animator;
    private TextRenderer textRenderer;
    private int displayList;

    public TextRendererDisplayListDemo() {
        super("TextRendererDisplayListDemo"); //$NON-NLS-1$
        setMinimumSize(new Dimension(600, 500));
        this.glpanel = new GLJPanel();
        this.glpanel.setSize(400, 400);
        this.glpanel.addGLEventListener(this);
        this.animator = new Animator(this.glpanel);
        getContentPane().add(this.glpanel);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    @Override
    public void display(GLAutoDrawable drawable) {
        drawable.getGL().glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
        drawable.getGL().glLoadIdentity();
        paintText(drawable, 100, 100);
        drawable.getGL().glCallList(this.displayList);
    }

    private void paintText(GLAutoDrawable drawable, int x, int y) {
        this.textRenderer.beginRendering(drawable.getWidth(), drawable.getHeight());
        this.textRenderer.setColor(1.0f, 0.2f, 0.2f, 0.8f);
        this.textRenderer.draw("Text to draw", x, y); //$NON-NLS-1$
        this.textRenderer.endRendering();
    }

    @Override
    public void displayChanged(GLAutoDrawable gl, boolean arg1, boolean arg2) {
        // do nothing
    }

    @Override
    public void init(GLAutoDrawable drawable) {
        GL gl = drawable.getGL();
        gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        if (null != this.textRenderer) {
            this.textRenderer.dispose();
        }
        this.textRenderer = new TextRenderer(getFont());
        if (0 != this.displayList) {
            gl.glDeleteLists(this.displayList, 1);
        }
        this.displayList = gl.glGenLists(1);
        gl.glNewList(this.displayList, GL.GL_COMPILE);
        paintText(drawable, 200, 200);
        gl.glEndList();
    }

    @Override
    public void reshape(GLAutoDrawable gl, int arg1, int arg2, int arg3, int arg4) {
        // do nothing
    }

    public static void main(String[] args) {
        TextRendererDisplayListDemo demo = new TextRendererDisplayListDemo();
        demo.setVisible(true);
        demo.animator.start();
    }
}