/*
 *	@(#)OffScreenTest.java 1.6 00/02/10 13:14:25
 *
 * Copyright (c) 1996-2000 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
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 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
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 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
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 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */

import com.sun.j3d.utils.geometry.ColorCube;
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;

/**
 * OffScreenTest issues renderOffScreenBuffer from the postSwap callback
 * of the OnScreen canvas.
 */
public class OffScreenTest extends Applet {

  public BranchGroup createSceneGraph(Raster drawRaster)
  {
    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();

    // spin object has composited transformation matrix
    Transform3D spin = new Transform3D();
    Transform3D tempspin = new Transform3D();

    spin.rotX(Math.PI/4.0d);
    tempspin.rotY(Math.PI/5.0d);
    spin.mul(tempspin);
    spin.setScale(0.7);
    spin.setTranslation(new Vector3d(-0.4, 0.3, 0.0));

    TransformGroup objTrans = new TransformGroup(spin);
    objRoot.addChild(objTrans);

    // Create a simple shape leaf node, add it to the scene graph.
    // ColorCube is a Convenience Utility class
    objTrans.addChild(new ColorCube(0.4));

    //Create a raster 
    Shape3D shape = new Shape3D(drawRaster);
    objRoot.addChild(shape);

    // Let Java 3D perform optimizations on this scene graph.
    objRoot.compile();

    return objRoot;
  }

  public OffScreenTest ()
  {
    setLayout(new BorderLayout());
    GraphicsConfiguration config =
       SimpleUniverse.getPreferredConfiguration();

    BufferedImage bImage = new BufferedImage(
				200, 200 , BufferedImage.TYPE_INT_ARGB);

    ImageComponent2D buffer = new ImageComponent2D(
				ImageComponent.FORMAT_RGBA, bImage);
    buffer.setCapability(ImageComponent2D.ALLOW_IMAGE_READ);

    Raster drawRaster = new Raster(
		new Point3f(0.0f, 0.0f, 0.0f), Raster.RASTER_COLOR,
		0, 0, 200, 200, buffer, null);

    drawRaster.setCapability(Raster.ALLOW_IMAGE_WRITE);

    // create the main scene graph
    BranchGroup scene = createSceneGraph(drawRaster);

    // create the on-screen canvas
    OnScreenCanvas3D d = new OnScreenCanvas3D(config, false);
    add("Center", d);

    // create a simple universe
    SimpleUniverse u = new SimpleUniverse(d);

    // This will move the ViewPlatform back a bit so the
    // objects in the scene can be viewed.
    u.getViewingPlatform().setNominalViewingTransform();

    // create an off Screen Canvas

    OffScreenCanvas3D c = new OffScreenCanvas3D(config, true, drawRaster);

    // set the offscreen to match the onscreen
    Screen3D sOn = d.getScreen3D();
    Screen3D sOff = c.getScreen3D();
    sOff.setSize(sOn.getSize());
    sOff.setPhysicalScreenWidth(sOn.getPhysicalScreenWidth());
    sOff.setPhysicalScreenHeight(sOn.getPhysicalScreenHeight());

    // attach the same view to the offscreen canvas
    u.getViewer().getView().addCanvas3D(c);

    // tell onscreen about the offscreen so it knows to
    // render to the offscreen at postswap
    d.setOffScreenCanvas(c);

    u.addBranchGraph(scene);
  }
  
  
  public static void main(String argv[])
  {
    new MainFrame(new OffScreenTest(), 500, 500);
  }
}
