Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

         *

         * Copyright (C) 2006 Instituto de Desarrollo Regional 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 Iba?ez, 50

         *   46010 VALENCIA

         *   SPAIN

         *

         *      +34 963862235

         *   gvsig@gva.es

         *      www.gvsig.gva.es

         *

         *    or

         *

         *   Instituto de Desarrollo Regional (Universidad de Castilla La-Mancha)

         *   Campus Universitario s/n

         *   02071 Alabacete

         *   Spain

         *

         *   +34 967 599 200

         */

package org.gvsig.remotesensing;

import java.util.ArrayList;

import org.gvsig.fmap.raster.layers.FLyrRasterSE;

import org.gvsig.raster.buffer.RasterBuffer;

import org.gvsig.raster.dataset.IBuffer;

import org.gvsig.raster.datastruct.ColorTable;

import org.gvsig.raster.grid.GridPalette;

import org.gvsig.raster.grid.filter.FilterTypeException;

import org.gvsig.raster.grid.filter.RasterFilterList;

import org.gvsig.raster.grid.filter.RasterFilterListManager;

import org.gvsig.raster.grid.filter.bands.ColorTableFilter;

import org.gvsig.raster.grid.filter.bands.ColorTableListManager;

import org.gvsig.raster.grid.filter.enhancement.LinearEnhancementFilter;

import org.gvsig.raster.grid.filter.statistics.TailTrimFilter;

import org.gvsig.raster.hierarchy.IRasterRendering;

import com.iver.cit.gvsig.fmap.layers.FLayer;

/**

 * Herramientas de usa general para la extensi?n extRemoteSensing.

 * 

 * @author Diego Guerrero Sevilla (diego.guerrero@uclm.es)

 *

 */

public class RemoteSensingUtils {

        /**

        * Asigna a la capa <code>lyr</code> una leyenda construida a partir

        * de un <code>ArrayList</code> de <code>ColorItem</code>.

        * 

        * @param lyr capa a la que se asigna la leyenda

        * @param colorItems ColorItems con los que se contruye la leyenda

        * 

        * @throws FilterTypeException 

        */

        public  static void setLeyend(FLayer lyr, ArrayList colorItems) throws FilterTypeException {

                if(lyr instanceof IRasterRendering) {

                        IRasterRendering rendering = (IRasterRendering) lyr;

                        ColorTable colorTable = new ColorTable();

                        colorTable.createPaletteFromColorItems(colorItems, false);

                        RasterFilterList filterList = rendering.getRenderFilterList();

                        RasterFilterListManager manager = new RasterFilterListManager(filterList);

                        ColorTableListManager cManager = (ColorTableListManager) manager.getManagerByClass(ColorTableListManager.class);

                        try {

                                filterList.remove(ColorTableFilter.class);

                                ((FLyrRasterSE)lyr).setLastLegend(null);

                                filterList.remove(LinearEnhancementFilter.class);

                                filterList.remove(TailTrimFilter.class);

                                GridPalette gridPalette = new GridPalette(colorTable);

                                cManager.addColorTableFilter(gridPalette);

                                ((FLyrRasterSE)lyr).setLastLegend(gridPalette);

                        } catch (FilterTypeException e) {

                                throw e;

                        }

                        rendering.setRenderFilterList(filterList);

                }

        }

        public static double getCellValueInLayerCoords(IBuffer buffer, int x, int y, int band) {

                int iType = buffer.getDataType();

                if (iType == RasterBuffer.TYPE_DOUBLE) {

                        return  buffer.getElemDouble(y, x, band);

                } else if (iType == RasterBuffer.TYPE_INT) {

                        return (double)  buffer.getElemInt(y, x, band);

                } else if (iType == RasterBuffer.TYPE_FLOAT) {

                        return (double)  buffer.getElemFloat(y, x, band);

                } else if (iType == RasterBuffer.TYPE_BYTE) {

                        return (double) (buffer.getElemByte(y, x, band) & 0xff);

                } else if ((iType == RasterBuffer.TYPE_SHORT) | (iType == RasterBuffer.TYPE_USHORT)) {

                        return (double)  buffer.getElemShort(y, x, band);

                }

                return buffer.getNoDataValue();

        }

}