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.awt.image.BufferedImage;

/**

 * Realzado Lineal (Amplitude Rescaling) para objetos Image.

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

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

 */

public         class LinearEnhancementImageFilter extends LinearEnhancementFilter {

        /**

         * Constructor

         */

        public LinearEnhancementImageFilter(){

                super();

        }

        /* (non-Javadoc)

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

         */

        public void pre(){

                //Obtenci?n de par?metros

                this.image = (Image)params.get("raster");

                this.stats = (RasterStats)params.get("stats");

                this.removeExtrema = ((Boolean)params.get("remove")).booleanValue();

                this.filename = (String)params.get("filename");

                height = image.getHeight(null);

                width = image.getWidth(null);

                super.pre();

        }

        /* (non-Javadoc)

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

         */

        public void process(int x, int y) {

                int pt = ((BufferedImage) image).getRGB(x,y);

                int []px4 = {

                        ((pt & 0xff000000) >> 24) & 0xff, ((pt & 0xff0000) >> 16) & 0xff,

                        ((pt & 0xff00) >> 8) & 0xff, pt & 0xff};

                for (int i=0; i<3; i++) {

                        if (px4[i+1] > maxBandValue[i])

                                px4[i+1] = maxBandValue[i];

                        else if (px4[i+1] < minBandValue[i] )

                                        px4[i+1] = minBandValue[i];

                        px4[i+1] = (((int) (((double)px4[i+1])*scale[i] + offset[i])) & 0xff);

                }

                ((BufferedImage) image).setRGB(x,y, (

                        (px4[0] << 24) & 0xff000000 | (px4[1] << 16) & 0xff0000 |

                        (px4[2] << 8)  & 0xff00 | (px4[3] & 0xff) ));

        }

        /* (non-Javadoc)

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

         */

        public Object getResult(String name) {

                if(name.equals("raster"))

                        return (Object)this.image;

                else 

                        return null;

        }

        /* (non-Javadoc)

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

         */

        public int getInRasterDataType(){

                return RasterBuf.TYPE_IMAGE;

        }

        /* (non-Javadoc)

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

         */

        public int getOutRasterDataType(){

                return RasterBuf.TYPE_IMAGE;

        }

        /* (non-Javadoc)

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

         */

        public void post(){};

        /* (non-Javadoc)

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

         */

        public void processLine(int y){};

}