Application: gvSIG desktop

/**********************************************************************

 * $Id: Overviews.java 9167 2006-12-04 16:01:24Z  $

 *

 * Name:     Overviews.java

 * Project:  

 * Purpose:  

 * Author:   Nacho Brodin, brodin_ign@gva.es

 *

 **********************************************************************/

/* gvSIG. Sistema de Informaci?n Geogr?fica 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 Ib??ez, 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 par?metro muestra

 * alguna informaci?n y a partir de la ?ltima 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 Overviews {

        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() ;

                           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);

                           double mag = ((LTIImage)img).getMinMagnification();

                           System.out.println("MinMagnification="+mag);

                           System.out.println("Levels from min mag: " + ((MrSIDImageReader)img).getNumLevelsFromMinMagnification());                   

                           System.out.println("**************Zoom******************");

                           for(int i = 0; i < overviews ; i++){

                                   double zoom = LTIUtils.levelToMag(i);

                                   int[] dims=img.getDimsAtMag(zoom);

                                   System.out.println("Dims At overview "+ i +"= "+dims[0]+" "+dims[1]);

                                   System.out.println("Zoom="+zoom);

                           }

                           double zoom = LTIUtils.levelToMag(overviews);

                           int[] dims=img.getDimsAtMag(zoom);

                           System.out.println("************************************");

                           //Creamos la escena con el tama?o 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();

           }

        }  

}