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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.statistics;

import org.cresques.io.data.RasterBuf;

/**

 * Calcula el m?ximo y el m?nimo de un raster.

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

 */

public class ComputeMinMaxShortFilter extends ComputeMinMaxFilter {

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

    /**

     * Constructor

     *

     */

    public ComputeMinMaxShortFilter() {

        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();

    }

    /* (non-Javadoc)

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

     */

    public void process(int col, int line)  {

        raster.getElemShort(line, col, px);

        int pxBand = px[0];

        if (pxBand < min[0]) {

            secondMin[0] = min[0];

            min[0] = pxBand;

        } else if ((pxBand < secondMin[0]) && (pxBand != min[0])) {

            secondMin[0] = pxBand;

        }

        if (pxBand > max[0]) {

            secondMax[0] = max[0];

            max[0] = pxBand;

        } else if ((pxBand > secondMax[0]) && (pxBand != max[0])) {

            secondMax[0] = pxBand;

        }

        pxBand = px[1];

        if (pxBand < min[1]) {

            secondMin[1] = min[1];

            min[1] = pxBand;

        } else if ((pxBand < secondMin[1]) && (pxBand != min[1])) {

            secondMin[1] = pxBand;

        }

        if (pxBand > max[1]) {

            secondMax[1] = max[1];

            max[1] = pxBand;

        } else if ((pxBand > secondMax[1]) && (pxBand != max[1])) {

            secondMax[1] = pxBand;

        }

        pxBand = px[2];

        if (pxBand < min[2]) {

            secondMin[2] = min[2];

            min[2] = pxBand;

        } else if ((pxBand < secondMin[2]) && (pxBand != min[2])) {

            secondMin[2] = pxBand;

        }

        if (pxBand > max[2]) {

            secondMax[2] = max[2];

            max[2] = pxBand;

        } else if ((pxBand > secondMax[2]) && (pxBand != max[2])) {

            secondMax[2] = pxBand;

        }

    }

    /* (non-Javadoc)

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

     */

    public void processSuperSampling(int col, int line)  {

            process(col, line);

        }

    /* (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() {

        super.post();

    }

    /* (non-Javadoc)

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

     */

    public void processLine(int y) {

    }

}