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.Vector;

/**

 * Filtro de transparencia aplicada a un rango de valores de un pixel sobre un objeto image

 * @author Nacho Brodin (brodin_ign@gva.es)

 *  

 */

public class TransparencyShortFilter extends TransparencyFilter{

        /**

         * Constructor

         *

         */

        public TransparencyShortFilter(){

                super();

        }

        /* (non-Javadoc)

         * @see org.cresques.io.raster.IRasterFilter#pre()

         */

        public void pre(){

                //Obtenci?n de par?metros

                this.raster = (RasterBuf)params.get("raster");

                height = raster.getHeight();

                width = raster.getWidth();

                super.pre();

        }

        /**

         * Para un vector de rangos de una banda concreta, si el punto pasado como par?metro

         * en la banda concreta est? en el rango especificado se asigna al valor de transparencia

         * por defecto.

         * @param range

         * @param banda

         * @param px

         */

        private void processRange(int[][] range, int banda, int[] px){

                for(int i=0;i<range.length;i++){

                        if(        (px[banda] >= range[i][0] && px[banda] <= range[i][1]) ){

                                px[3] = this.alpha;

                                px[0] = this.transparencyColorRed;

                                px[1] = this.transparencyColorGreen;

                                px[2] = this.transparencyColorBlue;

                        }

                }

        }

        /* (non-Javadoc)

         * @see org.cresques.io.raster.IRasterFilter#process(int, int)

         */

        public void process(int x, int y) {

                raster.getElemInt(x, y, px);

                if(rangesR!=null)

                        processRange(rangesR, 0, px);

                if(rangesG!=null)

                        processRange(rangesG, 1, px);

                if(rangesB!=null)

                        processRange(rangesB, 2, px);

                raster.setElemInt(x, y, px);

        }

        /* (non-Javadoc)

         * @see org.cresques.io.raster.IRasterFilter#getInRasterDataType()

         */

        public int getInRasterDataType(){

                return RasterBuf.TYPE_SHORT;

        }

        /* (non-Javadoc)

         * @see org.cresques.io.raster.IRasterFilter#getOutRasterDataType()

         */

        public int getOutRasterDataType(){

                return RasterBuf.TYPE_SHORT;

        }

        /* (non-Javadoc)

         * @see org.cresques.io.raster.IRasterFilter#getResult(java.lang.String)

         */

        public Object getResult(String name){

                if(name.equals("raster"))

                        return (Object)this.raster;

                else 

                        return null;

        }

        /* (non-Javadoc)

         * @see org.cresques.io.raster.RasterFilter#processLine(int)

         */

        public void processLine(int y){};

        /* (non-Javadoc)

         * @see org.cresques.io.raster.IRasterFilter#post()

         */

        public void post(){}

}