/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org
This file is part of Gephi.
Gephi is free software: you can redistribute it and/or modify
it under the terms of the 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.
Gephi 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with Gephi. If not, see <http://www.gnu.org/licenses/>.
*/
package org.gephi.ui.utils;
import java.awt.Color;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageProducer;
import java.awt.image.RGBImageFilter;
//From Netbeans Profiler sources - ProfilerControlPanel2
//Tomas Hurka
//Ian Formanek
public final class WhiteFilter extends RGBImageFilter {
//~ Instance fields ------------------------------------------------------------------------------------------------------
private final float[] hsv = new float[3];
//~ Constructors ---------------------------------------------------------------------------------------------------------
/**
* Constructs a GrayFilter object that filters a color image to a
* grayscale image. Used by buttons to create disabled ("grayed out")
* button images.
*/
public WhiteFilter() {
// 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;
}
//~ Methods --------------------------------------------------------------------------------------------------------------
/**
* Creates a disabled image
*/
public static Image createDisabledImage(final Image i) {
final WhiteFilter filter = new WhiteFilter();
final ImageProducer prod = new FilteredImageSource(i.getSource(), filter);
return Toolkit.getDefaultToolkit().createImage(prod);
}
/**
* Overrides <code>RGBImageFilter.filterRGB</code>.
*/
public int filterRGB(final int x, final int y, final int rgb) {
int transparency = (rgb >> 24) & 0xFF;
if (transparency <= 1) {
return rgb; // do not alter fully transparent pixels (those would end up being black)
}
transparency /= 2; // set transparency to 50% of original
Color.RGBtoHSB((rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, (rgb >> 0) & 0xFF, hsv);
hsv[1] = 0;
return Color.HSBtoRGB(hsv[0], hsv[1], hsv[2]) + (transparency << 24);
}
}