/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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 or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.swing;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageProducer;
import java.awt.image.RGBImageFilter;
public class SmallMindGrayFilter extends RGBImageFilter {
private boolean brighter;
private int percent;
public static Image createDisabledImage (Image image) {
SmallMindGrayFilter filter = new SmallMindGrayFilter(true, 50);
ImageProducer prod = new FilteredImageSource(image.getSource(), filter);
return Toolkit.getDefaultToolkit().createImage(prod);
}
/**
* Constructs a GrayFilter object that filters a color image to a
* grayscale image. Used by buttons to create disabled ("grayed out")
* button images.
*
* @param brighter a boolean -- true if the pixels should be brightened
* @param percent an int in the range 0..100 that determines the percentage
* of gray, where 100 is the darkest gray, and 0 is the lightest
*/
public SmallMindGrayFilter (boolean brighter, int percent) {
this.brighter = brighter;
this.percent = percent;
// canFilterIndexColorModel indicates whether or not it is acceptable
// to apply the color filtering of the filterRGB method to the color
// table entries of an IndexColorModel object in lieu of pixel by pixel
// filtering.
canFilterIndexColorModel = true;
}
public int filterRGB (int x, int y, int rgb) {
int gray = ((((rgb >> 16) & 0xff) + ((rgb >> 8) & 0xff) + (rgb & 0xff)) / 3);
if (brighter) {
gray = (255 - ((255 - gray) * (100 - percent) / 100));
}
else {
gray = (gray * (100 - percent) / 100);
}
if (gray < 0) gray = 0;
if (gray > 255) gray = 255;
return (rgb & 0xff000000) | (gray << 16) | (gray << 8) | (gray);
}
}