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diff --git a/libjava/classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java b/libjava/classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java
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+/* BufferedImageGraphics.java
+   Copyright (C) 2006 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 gnu.java.awt.peer.gtk;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.GraphicsConfiguration;
+import java.awt.Image;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Shape;
+import java.awt.font.GlyphVector;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Rectangle2D;
+import java.awt.image.BufferedImage;
+import java.awt.image.DataBuffer;
+import java.awt.image.DataBufferInt;
+import java.awt.image.ColorModel;
+import java.awt.image.DirectColorModel;
+import java.awt.image.RenderedImage;
+import java.awt.image.ImageObserver;
+import java.util.WeakHashMap;
+
+/**
+ * Implementation of Graphics2D on a Cairo surface.
+ *
+ * Simutanously maintains a CairoSurface and updates the 
+ * BufferedImage from that after each drawing operation.
+ */
+public class BufferedImageGraphics extends CairoGraphics2D
+{
+  /**
+   * the buffered Image.
+   */
+  private BufferedImage image;
+
+  /**
+   * Image size.
+   */
+  private int imageWidth, imageHeight;
+
+  /**
+   * The cairo surface that we actually draw on.
+   */
+  CairoSurface surface;
+
+  /**
+   * Cache BufferedImageGraphics surfaces.
+   */
+  static WeakHashMap bufferedImages = new WeakHashMap();
+
+  /**
+   * Its corresponding cairo_t.
+   */
+  private long cairo_t;
+
+  /**
+   * Colormodels we recognize for fast copying.
+   */  
+  static ColorModel rgb32 = new DirectColorModel(32, 0xFF0000, 0xFF00, 0xFF);
+  static ColorModel argb32 = new DirectColorModel(32, 0xFF0000, 0xFF00, 0xFF,
+						  0xFF000000);
+  private boolean hasFastCM;
+  private boolean hasAlpha;
+
+
+  public BufferedImageGraphics(BufferedImage bi)
+  {
+    this.image = bi;
+    imageWidth = bi.getWidth();
+    imageHeight = bi.getHeight();
+    if(bi.getColorModel().equals(rgb32))
+      {
+	hasFastCM = true;
+	hasAlpha = false;
+      }
+    else if(bi.getColorModel().equals(argb32))
+      {
+	hasFastCM = true;
+	hasAlpha = false;
+      }
+    else
+      hasFastCM = false;
+
+    // Cache surfaces.
+    if( bufferedImages.get( bi ) != null )
+      surface = (CairoSurface)bufferedImages.get( bi );
+    else
+      {
+	surface = new CairoSurface( imageWidth, imageHeight );
+	bufferedImages.put(bi, surface);
+      }
+
+    cairo_t = surface.newCairoContext();
+
+    DataBuffer db = bi.getRaster().getDataBuffer();
+    int[] pixels;
+    // get pixels
+
+    if(db instanceof CairoSurface)
+      pixels = ((CairoSurface)db).getPixels(imageWidth * imageHeight);
+    else
+      {
+	if( hasFastCM )
+	  {
+	    pixels = ((DataBufferInt)db).getData();
+	    if( !hasAlpha )
+	      for(int i = 0; i < pixels.length; i++)
+		pixels[i] &= 0xFFFFFFFF;
+	  }
+	else
+	  {
+	    pixels = CairoGraphics2D.findSimpleIntegerArray
+	      (image.getColorModel(),image.getData());
+	  }
+      }
+    surface.setPixels( pixels );
+
+    setup( cairo_t );
+    setClip(0, 0, imageWidth, imageHeight);
+  }
+  
+  BufferedImageGraphics(BufferedImageGraphics copyFrom)
+  {
+    surface = copyFrom.surface;
+    cairo_t = surface.newCairoContext();
+    imageWidth = copyFrom.imageWidth;
+    imageHeight = copyFrom.imageHeight;
+    copy( copyFrom, cairo_t );
+    setClip(0, 0, surface.width, surface.height);
+  }
+
+  /**
+   * Update a rectangle of the bufferedImage. This can be improved upon a lot.
+   */
+  private void updateBufferedImage(int x, int y, int width, int height)
+  {  
+    int[] pixels = surface.getPixels(imageWidth * imageHeight);
+
+    if( x > imageWidth || y > imageHeight )
+      return;
+    // Clip edges.
+    if( x < 0 ){ width = width + x; x = 0; }
+    if( y < 0 ){ height = height + y; y = 0; }
+    if( x + width > imageWidth ) 
+      width = imageWidth - x;
+    if( y + height > imageHeight ) 
+      height = imageHeight - y;
+
+    if( !hasFastCM )
+      image.setRGB(x, y, width, height, pixels, 
+		   x + y * imageWidth, imageWidth);
+    else
+      System.arraycopy(pixels, y * imageWidth, 
+		       ((DataBufferInt)image.getRaster().getDataBuffer()).
+		       getData(), y * imageWidth, height * imageWidth);
+  }
+
+  /**
+   * Abstract methods.
+   */  
+  public Graphics create()
+  {
+    return new BufferedImageGraphics(this);
+  }
+  
+  public GraphicsConfiguration getDeviceConfiguration()
+  {
+    return null;
+  }
+
+  protected Rectangle2D getRealBounds()
+  {
+    return new Rectangle2D.Double(0.0, 0.0, imageWidth, imageHeight);
+  }
+  
+  public void copyAreaImpl(int x, int y, int width, int height, int dx, int dy)
+  {
+    surface.copyAreaNative(x, y, width, height, dx, dy, surface.width);
+    updateBufferedImage(x + dx, y + dy, width, height);
+  }
+
+  /**
+   * Overloaded methods that do actual drawing need to enter the gdk threads 
+   * and also do certain things before and after.
+   */
+  public void draw(Shape s)
+  {
+    super.draw(s);
+    Rectangle r = s.getBounds();
+    updateBufferedImage(r.x, r.y, r.width, r.height);
+  }
+
+  public void fill(Shape s)
+  {
+    super.fill(s);
+    Rectangle r = s.getBounds();
+    updateBufferedImage(r.x, r.y, r.width, r.height);
+  }
+
+  public void drawRenderedImage(RenderedImage image, AffineTransform xform)
+  {
+    super.drawRenderedImage(image, xform);
+    updateBufferedImage(0, 0, imageWidth, imageHeight);
+  }
+
+  protected boolean drawImage(Image img, AffineTransform xform,
+			      Color bgcolor, ImageObserver obs)
+  {
+    boolean rv = super.drawImage(img, xform, bgcolor, obs);
+    updateBufferedImage(0, 0, imageWidth, imageHeight);
+    return rv;
+  }
+
+  public void drawGlyphVector(GlyphVector gv, float x, float y)
+  {
+    super.drawGlyphVector(gv, x, y);
+    updateBufferedImage(0, 0, imageWidth, imageHeight);
+  }
+}
+