import static com.jogamp.opengl.GL2ES3.GL_COLOR;
import static com.jogamp.opengl.GL2ES3.GL_DEPTH;

import java.nio.FloatBuffer;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

import com.jogamp.opengl.GL4;
import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLEventListener;
import com.jogamp.opengl.swt.GLCanvas;
import com.jogamp.opengl.util.GLBuffers;

public class OpenGLTest extends GLCanvas implements GLEventListener
{

  public static void main(String[] args)
  {
    final Display display = new Display();
    final Shell shell = new Shell(display, SWT.RESIZE | SWT.MAX | SWT.CLOSE);
    shell.setSize(700, 600);
    shell.setText("Simple SWT viewer");
    shell.setLayout(new FillLayout(SWT.VERTICAL));

    new OpenGLTest(shell, SWT.NONE);

    shell.open();
    while ( !shell.isDisposed() )
    {
      if ( !display.readAndDispatch() )
        display.sleep();
    }
    display.dispose();
  }

  private OpenGLTest(final Composite parent, final int style)
  {
    super(parent, SWT.NO_MERGE_PAINTS, null, null);
    addGLEventListener(this);
  }

  @Override
  public void init(GLAutoDrawable drawable)
  {}

  @Override
  public void dispose(GLAutoDrawable drawable)
  {}

  @Override
  public void display(GLAutoDrawable drawable)
  {
    GL4 gl = drawable.getGL().getGL4();

    FloatBuffer clearColor = GLBuffers.newDirectFloatBuffer(4);
    FloatBuffer clearDepth = GLBuffers.newDirectFloatBuffer(1);

    gl.glClearBufferfv(GL_COLOR, 0, clearColor.put(0, 1f).put(1, .5f).put(2, 0f).put(3, 1f));
    gl.glClearBufferfv(GL_DEPTH, 0, clearDepth.put(0, 1f));

    // redraw();
  }

  @Override
  public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height)
  {

  }
}