package glredbook11;
import java.awt.event.*;
import java.nio.ByteBuffer;
import javax.swing.JFrame;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*;
/**
* This program demonstrates using glBindTexture() by creating and managing two
* textures.
*
* @author Kiet Le (Java port)
*/
public class texbind
extends JFrame
implements GLEventListener, KeyListener
{
private GLCapabilities caps;
private GLCanvas canvas;
private GLU glu;
private GLUT glut;
//
private static final int rgba = 4;
private static final int checkImageWidth = 64;
private static final int checkImageHeight = 64;
// private byte checkImage[][][];
// private byte otherImage[][][];
private ByteBuffer checkImageBuf = //
BufferUtil.newByteBuffer(checkImageWidth * checkImageHeight * rgba);
private ByteBuffer otherImageBuf = //
BufferUtil.newByteBuffer(checkImageWidth * checkImageHeight * rgba);
private int[] texName = new int[2];
public texbind()
{
super("texbind");
caps = new GLCapabilities();
canvas = new GLCanvas(caps);
canvas.addGLEventListener(this);
canvas.addKeyListener(this);
getContentPane().add(canvas);
}
public void run()
{
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(250, 250);
setLocationRelativeTo(null);
setVisible(true);
canvas.requestFocusInWindow();
}
public static void main(String[] args)
{
new texbind().run();
}
public void init(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
glu = new GLU();
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.glShadeModel(GL.GL_FLAT);
gl.glEnable(GL.GL_DEPTH_TEST);
makeCheckImages();
gl.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, 1);
gl.glGenTextures(2, texName, 0);
gl.glBindTexture(GL.GL_TEXTURE_2D, texName[0]);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER,
GL.GL_NEAREST);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER,
GL.GL_NEAREST);
gl.glTexImage2D(GL.GL_TEXTURE_2D, 0, GL.GL_RGBA, checkImageWidth,
checkImageHeight, 0, GL.GL_RGBA, GL.GL_UNSIGNED_BYTE, checkImageBuf);
gl.glBindTexture(GL.GL_TEXTURE_2D, texName[1]);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER,
GL.GL_NEAREST);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER,
GL.GL_NEAREST);
gl.glTexEnvf(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_DECAL);
gl.glTexImage2D(GL.GL_TEXTURE_2D, 0, GL.GL_RGBA, checkImageWidth,
checkImageHeight, 0, GL.GL_RGBA, GL.GL_UNSIGNED_BYTE, otherImageBuf);
gl.glEnable(GL.GL_TEXTURE_2D);
}
public void display(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
gl.glBindTexture(GL.GL_TEXTURE_2D, texName[0]);
gl.glBegin(GL.GL_QUADS);
gl.glTexCoord2d(0.0, 0.0);
gl.glVertex3d(-2.0, -1.0, 0.0);
gl.glTexCoord2d(0.0, 1.0);
gl.glVertex3d(-2.0, 1.0, 0.0);
gl.glTexCoord2d(1.0, 1.0);
gl.glVertex3d(0.0, 1.0, 0.0);
gl.glTexCoord2d(1.0, 0.0);
gl.glVertex3d(0.0, -1.0, 0.0);
gl.glEnd();
gl.glBindTexture(GL.GL_TEXTURE_2D, texName[1]);
gl.glBegin(GL.GL_QUADS);
gl.glTexCoord2d(0.0, 0.0);
gl.glVertex3d(1.0, -1.0, 0.0);
gl.glTexCoord2d(0.0, 1.0);
gl.glVertex3d(1.0, 1.0, 0.0);
gl.glTexCoord2d(1.0, 1.0);
gl.glVertex3d(2.41421, 1.0, -1.41421);
gl.glTexCoord2d(1.0, 0.0);
gl.glVertex3d(2.41421, -1.0, -1.41421);
gl.glEnd();
gl.glFlush();
}
public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h)
{
GL gl = drawable.getGL();
gl.glViewport(0, 0, w, h);
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
glu.gluPerspective(60.0, (float) w / (float) h, 1.0, 30.0);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslated(0.0, 0.0, -3.6);
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,
boolean deviceChanged)
{
}
private void makeCheckImages()
{
byte c = 0x00;
for (int i = 0; i < checkImageWidth; i++)
{
for (int j = 0; j < checkImageHeight; j++)
{
c = (byte) ((((byte) ((i & 0x8) == 0 ? 0x00 : 0xff)//
^ (byte) ((j & 0x8) == 0 ? 0x00 : 0xff))));
// checkImage[i][j][0] = (byte) c;
// checkImage[i][j][1] = (byte) c;
// checkImage[i][j][2] = (byte) c;
checkImageBuf.put((byte) c);
checkImageBuf.put((byte) c);
checkImageBuf.put((byte) c);
checkImageBuf.put((byte) 0xff);
c = (byte) ((((byte) ((i & 0x10) == 0 ? 0x00 : 0xff)//
^ (byte) ((j & 0x10) == 0 ? 0x00 : 0xff))));
otherImageBuf.put((byte) c);
otherImageBuf.put((byte) 0);
otherImageBuf.put((byte) 0);
otherImageBuf.put((byte) 0xff);
}
}
checkImageBuf.rewind();
otherImageBuf.rewind();
}
public void keyTyped(KeyEvent key)
{
}
public void keyPressed(KeyEvent key)
{
switch (key.getKeyCode()) {
case KeyEvent.VK_ESCAPE:
System.exit(0);
default:
break;
}
}
public void keyReleased(KeyEvent key)
{
}
}
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