/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org
This file is part of Gephi.
DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
Copyright 2011 Gephi Consortium. All rights reserved.
The contents of this file are subject to the terms of either the GNU
General Public License Version 3 only ("GPL") or the Common
Development and Distribution License("CDDL") (collectively, the
"License"). You may not use this file except in compliance with the
License. You can obtain a copy of the License at
http://gephi.org/about/legal/license-notice/
or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
specific language governing permissions and limitations under the
License. When distributing the software, include this License Header
Notice in each file and include the License files at
/cddl-1.0.txt and /gpl-3.0.txt. If applicable, add the following below the
License Header, with the fields enclosed by brackets [] replaced by
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"Portions Copyrighted [year] [name of copyright owner]"
If you wish your version of this file to be governed by only the CDDL
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"[Contributor] elects to include this software in this distribution
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However, if you add GPL Version 3 code and therefore, elected the GPL
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Contributor(s):
Portions Copyrighted 2011 Gephi Consortium.
*/
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>.
*/
@Override
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);
}
}