Application: gvSIG desktop

/*

 * Created on 25-sep-2004

 *

 * TODO To change the template for this generated file go to

 * Window - Preferences - Java - Code Style - Code Templates

 */

package org.cresques.io;

import java.awt.Color;

import java.awt.Image;

import java.awt.geom.Point2D;

import java.awt.image.BufferedImage;

import java.io.IOException;

import java.util.Vector;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import org.cresques.io.GeoFile;

import org.cresques.io.GeoRasterFile;

import org.cresques.px.Extent;

import es.gva.cit.jbsb.BsbException;

/**

 * Soporte 'nativo' para Bsb.

 * Este conjunto de funcionalidades est? tomado de manera casi literal

 * del soporte para ECW de ermapper.<br>

 * Probablemente esto deber?a formar parte del JNI que recubre a la

 * librer?a en C extraida de gdal.<br>

 * Lo pongo aqu? a manera de ejemplo de como atacar un formato binario

 * desde Java.<br><br>   

 * @author Luis W. Sevilla.

 */

class BsbNative extends es.gva.cit.jbsb.Bsb {

        // Polilinea con extent

        class Contour extends Vector {

                public double minX = Double.MAX_VALUE, minY = Double.MAX_VALUE;

                public double maxX = -Double.MAX_VALUE, maxY = -Double.MAX_VALUE;

                public Contour() {

                        super();

                }

                public void add(Point2D pt) {

                        super.add(pt);

                        if (pt.getX() > maxX) maxX = pt.getX();

                        if (pt.getX() < minX) minX = pt.getX();

                        if (pt.getY() > maxY) maxY = pt.getY();

                        if (pt.getY() < minY) minY = pt.getY();

                }

        }

        private int [] paleta = null;

        /**

         * Contorno en coordenadas geogr?ficas. (y Extent del raster).

         */

        public Contour esq = new Contour();

        public int width = 0, height = 0;

        public double originX = 0D, originY = 0D;

        public String version = "";

        public BsbNative(String fName) throws BsbException {

                super();

                try {

                        init(fName);

                } catch (IOException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

        }

        private void init(String fName) throws BsbException, IOException {

                bsbOpen(fName);

                width = g_psInfo.nXSize;

                height = g_psInfo.nYSize;

                Vector pal = new Vector();

                String buf = null;

                  for (int i=0; i<g_psInfo.papszHeader.length; i++) {

                          buf = g_psInfo.papszHeader[i];

                          if (buf.length()<1) continue;

                          if (buf.startsWith("RGB/")) {

                                  String [] dat = buf.split(",");

                                  pal.add(new Color(Integer.parseInt(dat[1]),

                                          Integer.parseInt(dat[2]),

                                        Integer.parseInt(dat[3])));

                          } else if (buf.startsWith("VER/")) {

                                  version = buf.substring(4);

                          } /*else if (buf.startsWith("PLY/")) { // Marco de hoja

                                  String [] dat = buf.split(",");

                                  esq.add(new Point2D.Double(Double.parseDouble(dat[2]),

                                                  Double.parseDouble(dat[1])));

                          }*/

                  }

                  if (true) { //version.startsWith("1")) {

                          esq.add(new Point2D.Double(0D,height));

                          esq.add(new Point2D.Double(0D,0D));

                          esq.add(new Point2D.Double(width,0D));

                          esq.add(new Point2D.Double(width,height));

                  }

                  paleta = new int[pal.size()];

                  for (int i=0; i<pal.size(); i++)

                          paleta[i] = ((Color) pal.get(i)).getRGB();

                  originX = esq.minX;

                  originY = esq.maxY;

        }

        double lastReadLine = -1;

        int currentViewWidth = -1;

        int currentViewHeight = -1;

        double currentViewX = 0D;

        double viewportScale = 0D;

        double step = 0D;

        public Point2D worldToRaster(Point2D pt) {

                double x = (((double) width)/(esq.maxX-esq.minX))*(pt.getX()-esq.minX);

                double y = (((double) height)/(esq.maxY-esq.minY))*(esq.maxY-pt.getY());

                Point2D ptRes = new Point2D.Double(x, y);

                return ptRes;

        }

        public int setView(double dWorldTLX, double dWorldTLY,

            double dWorldBRX, double dWorldBRY,

            int nWidth, int nHeight) {

                int err = 0;

                Point2D tl = worldToRaster(new Point2D.Double(dWorldTLX, dWorldTLY));

                Point2D br = worldToRaster(new Point2D.Double(dWorldBRX, dWorldBRY));

                // Calcula cual es la primera l?nea a leer;

                currentViewWidth = nWidth;

                currentViewHeight = nHeight;

                currentViewX = tl.getX();

                viewportScale = (double) currentViewWidth/(br.getX()-tl.getX());

                step = 1D/viewportScale;

                lastReadLine = tl.getY();

                System.out.println("BsbFile: TL=("+dWorldTLX+","+dWorldTLY+

                        "); BR=("+dWorldBRX+","+dWorldBRY+")\n"+

                        "BsbFile: escala="+viewportScale+"; lastReadLine="+lastReadLine);

                return err;

        }

        public int readLineRGBA(int [] line) throws BsbException {

                int err = 0;

                  bsbReadLine((int) lastReadLine);

                  lastReadLine += step;

                  byte [] l = g_buffer.pabyScanLineBuf;

                  int white = Color.BLUE.getRGB();

                  float j =(float) currentViewX;

                  for (int i=0; i<currentViewWidth && j<l.length; i++, j+=step) {

                          line[i] = paleta[l[(int) j]-1];

                  }

                //for (int i=0; i<currentViewWidth; i++) line[i] = 128+128*256+128*256*256;

                return err;

        }

        void pintaInfo() {

                  System.out.println("Fichero BSB: Info ("+g_psInfo.papszHeader.length+" l?neas):");

                  for (int i=0; i<g_psInfo.papszHeader.length; i++) {

                          if (g_psInfo.papszHeader[i].length()<1) continue;

                          System.out.println("info["+i+"] = "+g_psInfo.papszHeader[i]);

                  }

        }

        void pintaPaleta() {

                  System.out.println("Fichero BSB: Paleta ("+paleta.length+" colores):");

                for (int i=0; i<paleta.length; i++)

                        System.out.println("color("+i+")="+paleta[i]);

        }

}

/**

 * @author Luis W. Sevilla

 */

public class BsbFile extends GeoRasterFile {

        private BsbNative file = null;

        private Extent v = null;

        static {

                GeoRasterFile.registerExtension("nos", BsbFile.class);

                GeoRasterFile.registerExtension("kap", BsbFile.class);

        }

        public BsbFile(IProjection proj, String fName) {

                super(proj, fName);

                extent = new Extent();

                try {

                        file = new BsbNative(fName);

                        showOnOpen();

                        load();

                } catch(BsbException e){

                          System.out.println("Error en BSBOpen");

                          e.printStackTrace();

                          file = null;

                }

        }

        public GeoFile load() {

                /*double minX, minY, maxX, maxY;

                minX = minY = 0D;

                maxX = (double) width;

                maxY = (double) height;*/

                extent = new Extent(file.esq.minX, file.esq.minY, file.esq.maxX, file.esq.maxY);

                return this;

        }

        public void setView(Extent e) { v = new Extent(e); }

        public Extent getView() { return v; }

        public int getWidth() {        return file.width; }

        public int getHeight() { return file.height;}

        /* (non-Javadoc)

         * @see org.cresques.io.GeoRasterFile#reProject(org.cresques.cts.ICoordTrans)

         */

        public void reProject(ICoordTrans rp) {

                // TODO Auto-generated method stub

        }

        /* (non-Javadoc)

         * @see org.cresques.io.GeoRasterFile#setTransparency(boolean)

         */

        public void setTransparency(boolean t) {

                // TODO Auto-generated method stub

        }

        public void setTransparency(int t) {

                // TODO Auto-generated method stub

        }

        /* (non-Javadoc)

         * @see org.cresques.io.GeoRasterFile#updateImage(int, int, org.cresques.cts.ICoordTrans)

         */

        public Image updateImage(int width, int height, ICoordTrans rp) {

                double dFileAspect, dWindowAspect;

                int line, pRGBArray[] = null;

                Image image = null;

                // Work out the correct aspect for the setView call.

                dFileAspect = (double)v.width()/(double)v.height();

                dWindowAspect = (double)width /(double)height;

                if (dFileAspect > dWindowAspect) {

                  height =(int)((double)width/dFileAspect);

                } else {

                  width = (int)((double)height*dFileAspect);

                }

                // Set the view

                file.setView(v.minX(), v.maxY(), v.maxX(), v.minY(),

                        width, height);

                image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

                pRGBArray = new int[width];

                try {

                        for (line=0; line < height; line++) {

                                file.readLineRGBA(pRGBArray);

                                ((BufferedImage)image).setRGB(0, line, width, 1, pRGBArray, 0, width);

                        }

                } catch (Exception e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

                return image;

        }

        public Image updateImage(int width, int height, ICoordTrans rp, Image img, int origBand, int destBand){

                return null;

        }

        private void showOnOpen() {

                  // Report en la apertura (quitar)

                  System.out.println("Fichero BSB '"+getName()+"' abierto.");

                  System.out.println("Version = "+file.version);

                  System.out.println("   Size = ("+file.width+","+file.height+")");

                  file.pintaInfo();

                  file.pintaPaleta();

        }

        /* (non-Javadoc)

         * @see org.cresques.io.GeoRasterFile#close()

         */

        public void close() {

        }

        /* (non-Javadoc)

         * @see org.cresques.io.GeoRasterFile#updateImage(int, int, org.cresques.cts.ICoordTrans, java.awt.Image, int)

         */

        public Image updateImage(int width, int height, ICoordTrans rp, Image img, int flags) {

                // TODO Auto-generated method stub

                return null;

        }

        /* (non-Javadoc)

         * @see org.cresques.io.GeoRasterFile#getData(int, int, int)

         */

        public Object getData(int x, int y, int band) {

                // TODO Auto-generated method stub

                return null;

        }

        /**

         * Devuelve los datos de una ventana solicitada

         * @param ulX        coordenada X superior izda.

         * @param ulY        coordenada Y superior derecha.

         * @param sizeX        tama?o en X de la ventana.

         * @param sizeY tama?o en Y de la ventana.

         * @param band        Banda solicitada.

         */

        public byte[] getWindow(int ulX, int ulY, int sizeX, int sizeY, int band){

                return null;

        }

        /**

         * Devuelve el tama?o de bloque

         * @return Tama?o de bloque

         */

        public int getBlockSize(){

     //TODO Nacho: Implementar getBlockSize de EcwFile

          return 1;

        }

}