/**
 *
 * This file is part of jReality. jReality is open source software, made
 * available under a BSD license:
 *
 * Copyright (c) 2003-2006, jReality Group: Charles Gunn, Tim Hoffmann, Markus
 * Schmies, Steffen Weissmann.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * - Redistributions 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 jReality nor the names of its contributors nor the
 *   names of their associated organizations may be used to endorse or promote
 *   products derived from this software without specific prior written
 *   permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */


package de.jreality.jogl;

import java.awt.Component;
import java.awt.GraphicsEnvironment;
import java.lang.ref.WeakReference;
import java.util.logging.Level;

import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLCapabilitiesChooser;
import javax.media.opengl.GLContext;

import de.jreality.scene.SceneGraphComponent;
import de.jreality.scene.SceneGraphPath;
import de.jreality.util.SceneGraphUtility;
public class Viewer extends AbstractViewer {
	protected GLCanvas canvas;

	public Viewer() {
		this(null, null);
	}

	public Viewer(SceneGraphPath camPath, SceneGraphComponent root) {
		setAuxiliaryRoot(SceneGraphUtility.createFullSceneGraphComponent("AuxiliaryRoot"));
		initializeFrom(root, camPath);	
	}
	@Override
	  protected void initializeFrom(SceneGraphComponent r, SceneGraphPath p)	{
		setSceneRoot(r);
		setCameraPath(p);
		GLCapabilities caps = new GLCapabilities();
		caps.setAlphaBits(8);
		caps.setStereo(JOGLConfiguration.quadBufferedStereo);
		caps.setDoubleBuffered(true);
		GLContext sharedContext = firstOne.get();
		if (JOGLConfiguration.multiSample)	{
			GLCapabilitiesChooser chooser = new MultisampleChooser();
			caps.setSampleBuffers(true);
			caps.setNumSamples(4);
			caps.setStereo(JOGLConfiguration.quadBufferedStereo);
			canvas = new GLCanvas(caps, chooser, sharedContext,  GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice());
		} else {
			canvas = new GLCanvas(caps);
		}
		drawable = canvas;
        JOGLConfiguration.getLogger().log(Level.INFO, "Caps is "+caps.toString());
 		drawable.addGLEventListener(this);
 		if (JOGLConfiguration.quadBufferedStereo) setStereoType(HARDWARE_BUFFER_STEREO);
//		canvas.requestFocus();
		if (JOGLConfiguration.sharedContexts && sharedContext == null) {
			firstOne = new WeakReference<GLContext>(drawable.getContext());
		}
	}

	public void dispose() {
		super.dispose();
		if (drawable != null) drawable.removeGLEventListener(this);
		drawable = null;
		canvas=null;
	}
	
	public void setStereoType(int type)	{
		super.setStereoType(type);
		if ((JOGLConfiguration.quadBufferedStereo && type != HARDWARE_BUFFER_STEREO)
			|| (!JOGLConfiguration.quadBufferedStereo && type == HARDWARE_BUFFER_STEREO)) {
			JOGLConfiguration.quadBufferedStereo = !JOGLConfiguration.quadBufferedStereo;
			if (drawable != null) drawable.removeGLEventListener(this);
			initializeFrom(getSceneRoot(), getCameraPath());
			component.add("Center", (Component) drawable);
		}
	}
}
