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How to draw a bitmapped letter on the screen E-mail
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Draws the bitmapped letter F on the screen (several times). This demonstrates use of the glBitmap() call. The example is ported from C examples in the OpenGL Programming Guide (known as the "red book").


Image

-> Copyright and Permission Notice

package glredbook10;

import java.awt.event.*;
import javax.swing.*;

import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*; 

/**
 * Draws the bitmapped letter F on the screen (several times). This demonstrates
 * use of the glBitmap() call.
 
 @author Kiet Le (Java conversion)
 */
public class drawf
  extends JFrame
    implements GLEventListener, KeyListener
{
  private GLCapabilities caps;
  private GLCanvas canvas;
  private FPSAnimator animator;
  private byte rasters[] new byte[]
  { (byte0xc0(byte0x00(byte0xc0(byte0x00(byte0xc0,
    (byte0x00(byte0xc0(byte0x00(byte0xc0(byte0x00,
    (byte0xff(byte0x00(byte0xff(byte0x00(byte0xc0,
    (byte0x00(byte0xc0(byte0x00(byte0xc0(byte0x00,
    (byte0xff(byte0xc0(byte0xff(byte0xc0 };


  public drawf()
  {
    super("drawf");

    caps = new GLCapabilities();
    canvas = new GLCanvas(caps);
    canvas.addGLEventListener(this);
    canvas.addKeyListener(this);

    getContentPane().add(canvas);
  }

  public void run()
  {
    setSize(500500);
    setLocationRelativeTo(null);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
    canvas.requestFocusInWindow();
  }

  public static void main(String[] args)
  {
    new drawf().run();
  }

  public void init(GLAutoDrawable drawable)
  {
    GL gl = drawable.getGL();

    gl.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, 1);
    gl.glClearColor(0.0f0.0f0.0f0.0f);
  }

  public void display(GLAutoDrawable drawable)
  {
    GL gl = drawable.getGL();

    gl.glClear(GL.GL_COLOR_BUFFER_BIT);
    gl.glColor3f(1.0f1.0f1.0f);
    gl.glRasterPos2f(20.5f20.5f);
    gl.glBitmap(10120.0f0.0f12.0f0.0f, rasters, 0);
    gl.glBitmap(10120.0f0.0f12.0f0.0f, rasters, 0);
    gl.glBitmap(10120.0f0.0f12.0f0.0f, rasters, 0);
    gl.glFlush();
  }

  public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h)
  {
    GL gl = drawable.getGL();
  
    gl.glViewport(00, w, h);
    gl.glMatrixMode(GL.GL_PROJECTION);
    gl.glLoadIdentity();
    gl.glOrtho(0, w, 0, h, -1.01.0);
    gl.glMatrixMode(GL.GL_MODELVIEW);
  }

  public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,
      boolean deviceChanged)
  {
  }

  public void keyTyped(KeyEvent key)
  {
    // TODO Auto-generated method stub
  }

  public void keyPressed(KeyEvent key)
  {
     switch (key.getKeyChar()) {
      case KeyEvent.VK_ESCAPE:
        System.exit(0);
        break;

      default:
        break;
    }
  }

  public void keyReleased(KeyEvent key)
  {
    // TODO Auto-generated method stub
  }

}

Source: Kiet Le's The Red Book Examples using JOGL


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