Application: gvSIG desktop

/*

 * Cresques Mapping Suite. Graphic Library for constructing mapping applications.

 *

 * Copyright (C) 2004-5.

 *

 * 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:

 *

 * cresques@gmail.com

 */

package org.cresques.io.raster;

import java.awt.Image;

import java.util.Hashtable;

/**

 * Filtro para raster. Ancestro de todos los filtros.

 * @author Luis W. Sevilla (sevilla_lui@gva.es)

 */

public abstract class RasterFilter implements IRasterFilter {

    protected RasterBuf raster = null;

    protected RasterStats stats = null;

    protected Image image = null;

    protected int[] px = new int[4];

    protected int height = 0;

    protected int width = 0;

    protected Hashtable params = new Hashtable();

    protected int incX = 1;

    protected int incY = 1;

    protected boolean exec = true; //Si est? a false no se ejecuta el  filtro

    /**

     * Constructor

     */

    public RasterFilter() {

    }

    /**

     * Aplica el filtro sobre el raster pasado pixel a pixel

     */

    public void execute() {

        pre();

        if (exec) {

            for (int y = 0; y < height; y = y + incY)

                for (int x = 0; x < width; x = x + incX) {

                    process(x, y);

                }

        }

        post();

    }

    /**

     * Aplica el filtro sobre el raster pasado por lineas

     */

    public void executeLines() {

        if (exec) {

            for (int y = 0; y < height; y++)

                processLine(y);

        }

    }

    /**

     * A?ade un par?metro al filtro

     */

    public void addParam(String name, Object param) {

        params.put(name, param);

    }

    /**

     * Funci?n que contiene el c?digo a ejecutar antes de aplicar el filtro

     */

    abstract public void pre();

    /**

     * Funci?n que contiene el c?digo a ejecutar despues de aplicar el filtro

     */

    abstract public void post();

    /**

     * Ejecuci?n del filtro para un pixel de la imagen

     */

    abstract public void process(int x, int y);

    /**

     * Ejecuci?n del filtro para una l?nea de la imagen

     */

    abstract public void processLine(int y);

    /**

     * Obtiene el tipo de datos del raster de entrada

     */

    abstract public int getInRasterDataType();

    /**

     * Obtiene el tipo de datos del raster de salida

     */

    abstract public int getOutRasterDataType();

    /**

     * Obtiene el resultado del filtro despues de su ejecuci?n a trav?s de una clave

     * @param name        clave para obtener un objeto resultado del filtro.

     */

    abstract public Object getResult(String name);

}