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/*

 * 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.filter.enhancement;

import java.awt.image.BufferedImage;

import org.cresques.io.data.RasterBuf;

import org.cresques.io.datastruct.Statistic;

/**

 * Realzado Lineal (Amplitude Rescaling) para imagenes de 16 bits.

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

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

 */

public class LinearEnhancementShortFilter extends LinearEnhancementFilter {

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

        private int                         bandsCnt = 3;

    /**

     * Constructor

     */

    public LinearEnhancementShortFilter() {

        super();

    }

    /* (non-Javadoc)

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

     */

    public void pre() {

        //Obtenci?n de par?metros

        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 short[] calcLinearEnhancement(short[] px){

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

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

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

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

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

            }

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

        }

            return px;

    }

    /* (non-Javadoc)

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

     */

    public void process(int col, int line) {

        raster.getElemShort(line, col, px);

        px = calcLinearEnhancement(px);

        raster.setElemShort(line, col, px);

    }

    /* (non-Javadoc)

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

     */

    public void processSuperSampling(int col, int line) {

            raster.getElemShort(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.setElemShort(i, j, px);

        }

    /* (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.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#post()

     */

    public void post() {

    }

    /* (non-Javadoc)

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

     */

    public void processLine(int y) {

    }

}