Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

package org.gvsig.raster.impl.datastruct.legend;

import java.awt.Color;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.text.NumberFormat;

import java.util.ArrayList;

import org.gvsig.fmap.dal.coverage.datastruct.ColorItem;

import org.gvsig.fmap.dal.coverage.store.props.ColorTable;

import org.gvsig.raster.impl.datastruct.ColorItemImpl;

import org.gvsig.raster.impl.store.properties.DataStoreColorTable;

/**

 * Clase GimpGradients sirve para importar y exportar gradientes de Gimp

 * Los ficheros de gradientes de gimp tienen la extension .ggr

 *

 * @version 03/12/2007

 * @author BorSanZa - Borja S?nchez Zamorano (borja.sanchez@iver.es)

 */

public class GimpGradients extends RasterLegendIO {

        /**

         * Devuelve el ColorItem asociado a una linea de un fichero de gradientes de

         * Gimp

         * @param strings

         * @param pos

         * @return

         */

        private ColorItem parseColorItem(String[] strings, int pos) {

                ColorItem item = new ColorItemImpl();

                double pos1 = Double.valueOf(strings[0]).doubleValue();

                double pos2 = Double.valueOf(strings[1]).doubleValue();

                double pos3 = Double.valueOf(strings[2]).doubleValue();

                if (pos == 0)

                        item.setValue(pos1 * 255);

                else

                        item.setValue(pos3 * 255);

                if (pos == 0)

                        item.setInterpolated((100 * (pos2 - pos1)) / (pos3 - pos1));

                if (pos == 0)

                        item.setColor(new Color(

                                (int) (Double.valueOf(strings[3]).doubleValue() * 255.0),

                                (int) (Double.valueOf(strings[4]).doubleValue() * 255.0),

                                (int) (Double.valueOf(strings[5]).doubleValue() * 255.0),

                                (int) (Double.valueOf(strings[6]).doubleValue() * 255.0)

                                ));

                else

                        item.setColor(new Color(

                                        (int) (Double.valueOf(strings[7]).doubleValue() * 255.0),

                                        (int) (Double.valueOf(strings[8]).doubleValue() * 255.0),

                                        (int) (Double.valueOf(strings[9]).doubleValue() * 255.0),

                                        (int) (Double.valueOf(strings[10]).doubleValue() * 255.0)

                                        ));

                return item;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.datastruct.io.RasterLegendIO#read(java.io.File)

         */

        public ColorTable read(File input) throws IOException {

                ArrayList<ColorItem> colorItems = new ArrayList<ColorItem>();

                ColorTable colorTable = new DataStoreColorTable();

                try {

                        BufferedReader reader = new BufferedReader(new FileReader(input));

                        String currentLine;

                        int cont = 0;

                        while ((currentLine = reader.readLine()) != null) {

                                if (cont == 1)

                                        colorTable.setName(currentLine.substring(6));

                                if (cont > 1) {

                                        String[] strings = currentLine.split("\\s+");

                                        if (strings.length < 13)

                                                continue;

                                        colorItems.add(parseColorItem(strings, 0));

                                        colorItems.add(parseColorItem(strings, 1));

                                }

                                cont++;

                        }

                        reader.close();

                } catch (IOException ex) {

                        throw new IOException();

                }

                colorTable.createPaletteFromColorItems(colorItems, true);

                return colorTable;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.datastruct.io.RasterLegendIO#write(org.gvsig.raster.datastruct.ColorTable, java.io.File)

         */

        public void write(ColorTable colorTable, File output) throws IOException {

                ArrayList<ColorItem> colorItems = colorTable.getColorItems();

                try {

                        BufferedWriter writer = new BufferedWriter(new FileWriter(output));

                        writer.write("GIMP Gradient\n");

                        writer.write("Name: " + colorTable.getName() + "\n");

                        writer.write((colorItems.size() - 1) + "\n");

                        String line;

                        for (int i = 1; i < colorItems.size(); i++) {

                                double min = ((ColorItem) colorItems.get(0)).getValue();

                                double max = ((ColorItem) colorItems.get(colorItems.size() - 1)).getValue();

                                line = "";

                                ColorItem item1 = (ColorItem) colorItems.get(i - 1);

                                ColorItem item2 = (ColorItem) colorItems.get(i);

                                double pos1 = (item1.getValue() - min) / (max - min);

                                double pos2 = (item2.getValue() - min) / (max - min);

                                NumberFormat format = NumberFormat.getNumberInstance();

                                format.setMaximumFractionDigits(6);

                                format.setMinimumFractionDigits(6);

                                line += format.format(pos1).replaceAll(",", ".") + " ";

                                double interp = pos1 + (((pos2 - pos1) * item1.getInterpolated()) / 100.0);

                                line += format.format(interp).replaceAll(",", ".") + " ";

                                line += format.format(pos2).replaceAll(",", ".") + " ";

                                Color color = item1.getColor();

                                line += format.format(color.getRed() / 255.0).replaceAll(",", ".") + " ";

                                line += format.format(color.getGreen() / 255.0).replaceAll(",", ".") + " ";

                                line += format.format(color.getBlue() / 255.0).replaceAll(",", ".") + " ";

                                line += format.format(color.getAlpha() / 255.0).replaceAll(",", ".") + " ";

                                color = item2.getColor();

                                line += format.format(color.getRed() / 255.0).replaceAll(",", ".") + " ";

                                line += format.format(color.getGreen() / 255.0).replaceAll(",", ".") + " ";

                                line += format.format(color.getBlue() / 255.0).replaceAll(",", ".") + " ";

                                line += format.format(color.getAlpha() / 255.0).replaceAll(",", ".") + " ";

                                line += "0 0\n";

                                writer.write(line);

                        }

                        writer.close();

                } catch (IOException ex) {

                        throw new IOException();

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.datastruct.io.RasterLegendIO#getDescription()

         */

        public String getDescription() {

                return "Gimp Gradients";

        }

}