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diff --git a/libjava/classpath/javax/swing/GrayFilter.java b/libjava/classpath/javax/swing/GrayFilter.java
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+++ b/libjava/classpath/javax/swing/GrayFilter.java
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+/* GrayFilter.java -- Java class for filtering Pixels to produce Gray Pictures
+   Copyright (C) 1999, 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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, or (at your option)
+any later version.
+
+GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing;
+
+import java.awt.Image;
+import java.awt.Toolkit;
+import java.awt.image.FilteredImageSource;
+import java.awt.image.RGBImageFilter;
+
+/**
+ * Produces grayscale images out of colored images. This is used to provide
+ * default disabled icons for buttons.
+ *
+ * @author original author unknown
+ */
+public class GrayFilter extends RGBImageFilter
+{
+  private boolean b;
+  private double p;
+
+  /**
+   * Create a GrayFilter. If b is true then brighten. Also, indicate how much
+   * gray.
+   *
+   * @param b if brighten
+   * @param p percent of gray, 0 - 100
+   */
+  public GrayFilter(boolean b, int p)
+  {
+    this.b = b; //FIXME - HANDLE THIS
+    this.p = (1. - (p / 100.)) / 3.;
+  }
+
+  /**
+   * Create grayed image
+   *
+   * @param src image to gray
+   *
+   * @return a grayed image
+   */
+  public static Image createDisabledImage(Image src)
+  {
+    return (Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(
+        src.getSource(), new GrayFilter(true, 0))));
+  }
+
+  /**
+   * Filter RGB to gray
+   */
+  public int filterRGB(int x, int y, int rgb)
+  {
+    int alpha = 0xff000000 & rgb;
+    int red = (0xff0000 & rgb) >> 16;
+    int green = (0xff00 & rgb) >> 8;
+    int blue = (0xff & rgb);
+    int gray = (int) ((0.299 * red + 0.587 * green + 0.114 * blue) * p);
+    if (b)
+      gray = Math.min(gray + 128, 255);
+    return gray | gray << 8 | gray << 16 | alpha ;
+  }
+}