/*

     dsh-iconbundle  Bundles of variants for icon images.

     Copyright (c) 2003-2013 held jointly by the individual authors.

     This library is free software; you can redistribute it and/or modify it

     under the terms of the GNU Lesser General Public License as published

     by the Free Software Foundation; either version 3 of the License, or (at

     your option) any later version.

     This library is distributed in the hope that it will be useful, but WITHOUT

     ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or

     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public

     License for more details.

     You should have received a copy of the GNU Lesser General Public License

     along with this library;  if not, write to the Free Software Foundation,

     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.

     > http://www.fsf.org/licensing/licenses/lgpl.html

     > http://www.opensource.org/licenses/lgpl-license.php

 */

 package org.dishevelled.iconbundle.impl;

 import java.awt.Color;

 import java.awt.image.Raster;

 import java.awt.image.WritableRaster;

 /**

  * Selection RasterOp.

  *

  * @author  Michael Heuer

  */

 final class SelectionRasterOp

     extends AbstractRasterOp

 {

     /** Pixel array size. */

     private static final int PIXEL_ARRAY_SIZE = 4;

     /** White color component. */

     private static final int WHITE = 255;

     /** Selection color. */

     private final Color selectionColor;

     /**

      * Create a new selection RasterOp with the specified

      * selection color.

      *

      * @param selectionColor selection color

      */

     public SelectionRasterOp(final Color selectionColor)

     {

         this.selectionColor = selectionColor;

     }

     /** {@inheritDoc} */

     public WritableRaster filter(final Raster src, final WritableRaster dest)

     {

         if (selectionColor != null)

         {

             float[] pixel = new float[PIXEL_ARRAY_SIZE];

             float[] selection = selectionColor.getColorComponents(new float[PIXEL_ARRAY_SIZE]);

             for (int x = 0, w = src.getWidth(); x < w; x++)

             {

                 for (int y = 0, h = src.getHeight(); y < h; y++)

                 {

                     pixel = src.getPixel(x, y, pixel);

                     pixel[0] = Math.min(pixel[0], selection[0] * WHITE);

                     pixel[1] = Math.min(pixel[1], selection[1] * WHITE);

                     pixel[2] = Math.min(pixel[2], selection[2] * WHITE);

                     dest.setPixel(x, y, pixel);

                 }

             }

         }

         return dest;

     }

 }