| gvSIG desktop 1

/*

 * Created on 25-feb-2005

 */

package org.cresques.io.raster;

import java.awt.Image;

import java.awt.image.BufferedImage;

/**

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

 */

public         class LinearEnhancementImageFilter extends LinearEnhancementFilter {

        public LinearEnhancementImageFilter(){

                super();

        }

        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();

                height = image.getHeight(null);

                width = image.getWidth(null);

                super.pre();

        }

        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) ));

        }

        public Object getResult(String name) {

                if(name.equals("raster"))

                        return (Object)this.image;

                else 

                        return null;

        }

        public int getInRasterDataType(){

                return RasterBuf.TYPE_IMAGE;

        }

        public int getOutRasterDataType(){

                return RasterBuf.TYPE_IMAGE;

        }

        public void post(){};

        public void processLine(int y){};

}