Application: gvSIG desktop

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

 *

 * Copyright (C) 2006 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.

 */

package org.gvsig.raster.grid.filter.enhancement;

import org.gvsig.raster.buffer.RasterBuffer;

import org.gvsig.raster.buffer.cache.RasterReadOnlyBuffer;

import org.gvsig.raster.dataset.IBuffer;

import org.gvsig.raster.dataset.Params;

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

/**

 * Clase base para los filtros de brillo.

 *

 * @version 31/05/2007

 * @author Miguel ?ngel Querol Carratal?  (miguelangel.querol@iver.es)

 */

public class BrightnessFilter extends RasterFilter {

        public static String[]        names = new String[] {"brightness"};

        /**

         * Variable para guardar el incremento de brillo que se va a aplicar

         */

        int incrBrillo = 0;

        /**

         * Constructor. Llama al constructor de la clase base y asigna el

         * nombre del filtro.

         */

        public BrightnessFilter() {

                setName(names[0]);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.RasterFilter#pre()

         */

        public void pre() {

                exec = true;

                incrBrillo = ((Integer) params.get("incrBrillo")).intValue();

                raster = rasterResult;

                raster = (RasterBuffer) params.get("raster");

                if (raster != null) {

                        height = raster.getHeight();

                        width = raster.getWidth();

                        rasterResult = RasterBuffer.getBuffer(IBuffer.TYPE_BYTE, raster.getWidth(), raster.getHeight(), raster.getBandCount(), true);

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.RasterFilter#post()

         */

        public void post() {

                // En caso de que nadie apunte a raster, se liberar? su memoria.

                raster = null;

        }

        /**

         * Obtiene el incremento de brillo que se est? aplicando

         * @return entero que representa el incremento de brillo aplicado.

         */

        public int getBrightnessIncrease() {

                return this.incrBrillo;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.IRasterFilter#getGroup()

         */

        public String getGroup() {

                return "realces";

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.IRasterFilter#getParams()

         */

        public Params getUIParams(String nameFilter) {

                Params params = new Params();

                params.setParam("Brightness",

                                new Integer(incrBrillo),

                                Params.SLIDER,

                                new String[]{ "-255", "255", "50", "1", "25" }); //min, max, valor defecto, intervalo peque?o, intervalo grande;

                return params;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.RasterFilter#getInRasterDataType()

         */

        public int getInRasterDataType() {

                return 0;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.RasterFilter#getOutRasterDataType()

         */

        public int getOutRasterDataType() {

                return RasterBuffer.TYPE_BYTE;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.enhancement.BrightnessFilter#getResult(java.lang.String)

         */

        public Object getResult(String name) {

                if (name.equals("raster")) {

                        if (!exec)

                                return this.raster;

                        return this.rasterResult;

                }

                return null;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.RasterFilter#process(int, int)

         */

        public void process(int x, int y) {

        }

        /**

         * Calcula el brillo para un pixel

         * @param px

         * @return

         */

        protected int calcBrightness(int px) {

                px += incrBrillo;

                if (px > 255)

                        px = 255;

                else if (px < 0)

                        px = 0;

                return px;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.RasterFilter#getName()

         */

        public String[] getNames() {

                return names;

        }

}