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package org.cresques.filter.enhancement;

import org.cresques.io.data.RasterBuf;

import org.cresques.io.datastruct.Statistic;

public class LinearEnhancementDoubleFilter extends LinearEnhancementFilter {

        private double[]                 px = new double[4];

        private int                         bandsCnt = 3;

        public void post() {

                // TODO Auto-generated method stub

        }

        public void process(int col, int line) {

                raster.getElemDouble(line, col, px);

        px = calcLinearEnhancement(px);

        raster.setElemDouble(line, col, px);

        }

        public void processSuperSampling(int col, int line) {

                raster.getElemDouble(line, col, px);

        px = calcLinearEnhancement(px);

                for(int j = col; j < raster.getWidth() && j < (col + stepX[contX + 1]); j++)

                        for(int i = line; i < raster.getHeight() && i < (line + stepY[contY + 1]); i++)

                                 raster.setElemDouble(i, j, px);

        }

        public void processLine(int y) {

                // TODO Auto-generated method stub

        }

        public int getInRasterDataType() {

                return RasterBuf.TYPE_DOUBLE;

        }

        public int getOutRasterDataType() {

                return RasterBuf.TYPE_DOUBLE;

        }

        public Object getResult(String name) {

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

            return (Object) this.raster;

        } else {

            return null;

        }

        }

        public void pre() {

//                Obtención de parámetros

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

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

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

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

        height = raster.getHeight();

        width = raster.getWidth();

        super.pre();

        }

        /**

     * Calculo del realce

     * @param pt pixel

     * @return pixel con el calculo de realce aplicado

     */

    private double[] calcLinearEnhancement(double[] px){

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

            if (px[i] > (float)maxBandValue[i]) {

                px[i] = (float)maxBandValue[i];

            } else if (px[i] < minBandValue[i]) {

                px[i] = (float)minBandValue[i];

            }

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

        }

            return px;

    }

}