/*
 * $RCSfile$
 *
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistribution of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * 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 MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or
 * intended for use in the design, construction, operation or
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 * $Revision$
 * $Date$
 * $State$
 */

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 {

    private SimpleUniverse u = null;

  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 ()
  {
  }

    public void init() {
	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
	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
	View v = u.getViewer().getView();
	v.addCanvas3D(c);
	
	// tell onscreen about the offscreen so it knows to
	// render to the offscreen at postswap
	d.setOffScreenCanvas(c);
	
	u.addBranchGraph(scene);
	v.stopView();
	// Make sure that image are render completely
	// before grab it in postSwap().
	d.setImageReady();
	v.startView();

    }

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