/**********************************************************************
 * $Id$
 *
 * Name:     Overviews.java
 * Project:  
 * Purpose:  
 * Author:   Nacho Brodin, brodin_ign@gva.es
 *
 **********************************************************************/
/* gvSIG. Sistema de Información Geográfica de la Generalitat Valenciana
*
* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.
*
* For more information, contact:
*
*  Generalitat Valenciana
*   Conselleria d'Infraestructures i Transport
*   Av. Blasco Ibáñez, 50
*   46010 VALENCIA
*   SPAIN
*
*      +34 963862235
*   gvsig@gva.es
*      www.gvsig.gva.es
*
*    or
*
*   IVER T.I. S.A
*   Salamanca 50
*   46005 Valencia
*   Spain
*
*   +34 963163400
*   dac@iver.es
*/

import es.gva.cit.jmrsid.*;
import java.io.*;

/**
 * Ejemplo de acceso a una overview de un mrsid. Accede a la imagen pasada como parámetro muestra
 * alguna información y a partir de la última overview salva a .raw toda la imagen. 
 * 
 * @author Nacho Brodin <brodin_ign@gva.es>.<BR> Equipo de desarrollo gvSIG.<BR> http://www.gvsig.gva.es
 * @version 0.0
 * @link http://www.gvsig.gva.es
 */
public class Overviews4 {
	public static void main(String[] args){
 
	   LTIImageReader img;
	   LTIMetadataDatabase metadata;
	   LTIPixel pixel;
	   int eColorSpace, nBands, eSampleType;
	   
	   try{
	   		img = new MrSIDImageReader(args[0]);
	   		img.initialize();
	   		
	   		//Obtenemos algunos datos
	   		
	   		int overviews=((MrSIDImageReader)img).getNumLevels()-1;
	   		System.out.println("Overviews="+overviews);
	   		System.out.println("Width="+img.getWidth());
	   		System.out.println("Height="+img.getHeight());
	   		System.out.println("Stripsheigth="+img.getStripHeight());
	   		nBands=img.getNumBands();
	   		System.out.println("NumBands="+nBands);
	   		eColorSpace=img.getColorSpace();
	   		System.out.println("ColorSpace="+eColorSpace);
	   		eSampleType=img.getDataType();
	   		System.out.println("DataType="+eSampleType);
	   		pixel=new LTIPixel(eColorSpace, nBands, eSampleType);
	   		
	   		System.out.println("**************Zoom******************");
	   		
	   		double zoom = LTIUtils.levelToMag(4);
	   		int[] dims=img.getDimsAtMag(zoom);
	   		System.out.println("Dims At overview "+overviews+"= "+dims[0]+" "+dims[1]);
	   		System.out.println("Zoom="+zoom);
	   		
	   		System.out.println("************************************");
	   		
	   		//Creamos la escena con el tamaño del overview deseado
	   		
	   		LTIScene scene=new LTIScene(0,0,dims[0],dims[1],zoom);
	   		LTISceneBuffer buffer=new LTISceneBuffer(pixel,dims[0],dims[1],true);
	   		((LTIImageStage)img).read(scene,buffer);
	   		
	   		FileOutputStream s=null;
	   		
	   		try{
		       File mifichero=new File("exit.raw");
		       s = new FileOutputStream(mifichero);
	   		}catch(Exception e){}
	   		
	   		
	   		try{
	   			for(int j=0;j<buffer.size;j++){
	   				s.write(buffer.buf1,j,1);
	   				s.write(buffer.buf2,j,1);
	   				s.write(buffer.buf3,j,1);
	   			}
	  		}catch(IOException e){
	  			System.out.println("Error writing a line in the file\n");	
	  			System.exit(1);
	  		}
	  		
	   		
			
	   		
	   }catch(Exception e){
	   		e.printStackTrace();
	 
	   }
	   
	  
	  
	}  
}