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.tools.app.basic.tool.filter.grayscale;

/**

 * Filtro para la conversi?n a escala de grises de tipo byte

 * @author Nacho Brodin nachobrodin@gmail.com

 */

public class GrayScaleByteFilter extends GrayScaleFilter {

        public void process(int col, int line) {

                byte value = 0;

                switch (type) {

                case 0:

                case 4:        value = raster.getElemByte(line, col, 0);

                                break;

                case 1:        value = raster.getElemByte(line, col, 1);

                                break;

                case 2:        value = raster.getElemByte(line, col, 2);

                                break;

                case 3:        int r = (raster.getElemByte(line, col, 0) & 0xff);

                                int g = (raster.getElemByte(line, col, 1) & 0xff);

                                int b = (raster.getElemByte(line, col, 2) & 0xff);

                                value = (byte)((r + g + b) / 3);

                                break;

                }

                rasterResult.setElem(line, col, 0, value);

                rasterResult.setElem(line, col, 1, value);

                rasterResult.setElem(line, col, 2, value);

                rasterResult.setElem(line, col, 3, (byte)255);

                writeAlphaBand(line, col);

        }

}