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.filter.enhancement;

import org.cresques.filter.RasterBuf;

/**

 * Filtro de transparencia aplicada a un rango de valores de un pixel sobre un objeto image

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

 *

 */

public class TransparencyShortFilter extends TransparencyFilter {

    /**

     * Constructor

     *

     */

    public TransparencyShortFilter() {

        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();

    }

    /**

     * Asigna al pixel pasado como par?metro como transparente con 

     * el color de transparencia que est? seleccionado

     * @param px Pixel a asignarle transparencia

     */

    private void setPixelTransparent(int[] px){

                px[3] = this.alpha;

        px[0] = this.transparencyColorRed;

        px[1] = this.transparencyColorGreen;

        px[2] = this.transparencyColorBlue;        

    }

    /**     

     * @param range rango

     * @param banda banda

     * @param px    pixel

     */

    private void processRange(int[] px) {

            for (int i = 0; i < rangesList.size(); i++) {

                    TransparencyRange tr = ((TransparencyRange)rangesList.get(i));

                    if(tr.isAnd()){

                            if(tr.getRed() != null)

                                    if (px[0] < tr.getRed()[0] || px[0] > tr.getRed()[1])

                                            continue;

                            if(tr.getGreen() != null)

                                    if (px[1] < tr.getGreen()[0] || px[1] > tr.getGreen()[1])

                                            continue;

                            if(tr.getBlue() != null)

                                    if (px[2] < tr.getBlue()[0] || px[2] > tr.getBlue()[1])

                                            continue;

                            if(tr.getRed() != null || tr.getGreen() != null || tr.getBlue() != null)

                                    setPixelTransparent(px);

                    }else{

                            if(tr.getRed() != null){

                                    if (px[0] >= tr.getRed()[0] && px[0] <= tr.getRed()[1]){

                                            setPixelTransparent(px);

                                            continue;

                                    }

                            }

                            if(tr.getGreen() != null){

                                    if (px[1] >= tr.getGreen()[0] && px[1] <= tr.getGreen()[1]){

                                            setPixelTransparent(px);

                                            continue;

                                    }

                            }

                            if(tr.getBlue() != null){

                                    if (px[2] >= tr.getBlue()[0] && px[2] <= tr.getBlue()[1]){

                                            setPixelTransparent(px);

                                            continue;

                                    }

                            }

                    }

            }

    }

    /* (non-Javadoc)

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

     */

    public void process(int x, int y) {

        raster.getElemInt(x, y, px);

        processRange(px);

        raster.setElemInt(x, y, px);

    }

    /* (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#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.RasterFilter#processLine(int)

     */

    public void processLine(int y) {

    }

    /* (non-Javadoc)

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

     */

    public void post() {

    }

}