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diff --git a/libjava/classpath/java/awt/image/SinglePixelPackedSampleModel.java b/libjava/classpath/java/awt/image/SinglePixelPackedSampleModel.java
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+/* Copyright (C) 2000, 2002, 2003, 2004  Free Software Foundation
+
+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 java.awt.image;
+
+import gnu.java.awt.BitMaskExtent;
+import gnu.java.awt.Buffers;
+
+/**
+ * @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
+ */
+public class SinglePixelPackedSampleModel extends SampleModel
+{
+  private int scanlineStride;
+  private int[] bitMasks;
+  private int[] bitOffsets;
+  private int[] sampleSize;
+  
+  public SinglePixelPackedSampleModel(int dataType, int w, int h,
+				      int[] bitMasks)
+  {
+    this(dataType, w, h, w, bitMasks);
+  }
+
+  public SinglePixelPackedSampleModel(int dataType, int w, int h,
+				      int scanlineStride, int[] bitMasks)
+  {
+    super(dataType, w, h, bitMasks.length);
+
+    switch (dataType)
+      {
+      case DataBuffer.TYPE_BYTE:
+      case DataBuffer.TYPE_USHORT:
+      case DataBuffer.TYPE_INT:
+	break;
+      default:
+	throw new IllegalArgumentException("SinglePixelPackedSampleModel unsupported dataType");
+      }
+    
+    this.scanlineStride = scanlineStride;
+    this.bitMasks = bitMasks;
+    
+    bitOffsets = new int[numBands];
+    sampleSize = new int[numBands];
+    
+    BitMaskExtent extent = new BitMaskExtent();
+    for (int b=0; b<numBands; b++)
+      {
+	extent.setMask(bitMasks[b]);
+	sampleSize[b] = extent.bitWidth;
+	bitOffsets[b] = extent.leastSignificantBit;
+      }
+  }
+
+  public int getNumDataElements()
+  {
+    return 1;
+  }
+
+  public SampleModel createCompatibleSampleModel(int w, int h)
+  {
+    /* FIXME: We can avoid recalculation of bit offsets and sample
+       sizes here by passing these from the current instance to a
+       special private constructor. */
+    return new SinglePixelPackedSampleModel(dataType, w, h, bitMasks);
+  }
+
+
+  /**
+   * Creates a DataBuffer for holding pixel data in the format and
+   * layout described by this SampleModel. The returned buffer will
+   * consist of one single bank.
+   */
+  public DataBuffer createDataBuffer()
+  {
+    int size;
+
+    // We can save (scanlineStride - width) pixels at the very end of
+    // the buffer. The Sun reference implementation (J2SE 1.3.1 and
+    // 1.4.1_01) seems to do this; tested with Mauve test code.
+    size = scanlineStride * (height - 1) + width;
+
+    return Buffers.createBuffer(getDataType(), size);
+  }
+
+
+  public int[] getSampleSize()
+  {
+    return sampleSize;
+  }
+  
+  public int getSampleSize(int band)
+  {
+    return sampleSize[band];
+  }
+
+  public int getOffset(int x, int y)
+  {
+    return scanlineStride*y + x;
+  }
+
+  public int[] getBitOffsets()
+  {
+    return bitOffsets;
+  }
+
+  public int[] getBitMasks()
+  {
+    return bitMasks;
+  }
+
+  public int getScanlineStride()
+  {
+    return scanlineStride;
+  }
+
+  public SampleModel createSubsetSampleModel(int[] bands)
+  {
+    // FIXME: Is this the right way to interpret bands?
+    
+    int numBands = bands.length;
+    
+    int[] bitMasks = new int[numBands];
+
+    for (int b=0; b<numBands; b++)
+      bitMasks[b] = this.bitMasks[bands[b]];
+
+    return new SinglePixelPackedSampleModel(dataType, width, height,
+					    scanlineStride, bitMasks);
+  }
+
+  public Object getDataElements(int x, int y, Object obj,
+				DataBuffer data)
+  {
+    int offset = scanlineStride*y + x + data.getOffset();
+    
+    return Buffers.getData(data, offset, obj,
+			   0, // destination offset,
+			   1  // length
+			   );
+  }
+  
+  /**
+   * This is a more efficient implementation of the default implementation in the super
+   * class. 
+   * @param x The x-coordinate of the pixel rectangle to store in <code>obj</code>.
+   * @param y The y-coordinate of the pixel rectangle to store in <code>obj</code>.
+   * @param w The width of the pixel rectangle to store in <code>obj</code>.
+   * @param h The height of the pixel rectangle to store in <code>obj</code>.
+   * @param obj The primitive array to store the pixels into or null to force creation.
+   * @param data The DataBuffer that is the source of the pixel data.
+   * @return The primitive array containing the pixel data.
+   * @see java.awt.image.SampleModel#getDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer)
+   */
+  public Object getDataElements(int x, int y, int w, int h, Object obj,
+							DataBuffer data)
+  {
+    int size = w*h;
+    int dataSize = size;
+    Object pixelData = null;
+    switch (getTransferType())
+    {
+      case DataBuffer.TYPE_BYTE:
+        pixelData = ((DataBufferByte) data).getData();
+        if (obj == null) obj = new byte[dataSize];
+        break;
+       case DataBuffer.TYPE_USHORT:
+         pixelData = ((DataBufferUShort) data).getData();
+         if (obj == null) obj = new short[dataSize];
+         break;
+        case DataBuffer.TYPE_INT:
+          pixelData = ((DataBufferInt) data).getData();
+          if (obj == null) obj = new int[dataSize];
+          break;
+         default:
+             // Seems like the only sensible thing to do.
+           throw new ClassCastException();
+      }
+      if(x==0 && scanlineStride == w)
+      { 
+        // The full width need to be copied therefore we can copy in one shot.
+        System.arraycopy(pixelData, scanlineStride*y + data.getOffset(), obj, 0, size);
+      }
+      else
+      {  
+        // Since we do not need the full width we need to copy line by line.
+        int outOffset = 0;
+        int dataOffset = scanlineStride*y + x + data.getOffset();
+        for (int yy = y; yy<(y+h); yy++)
+        {
+          System.arraycopy(pixelData, dataOffset, obj, outOffset, w);
+          dataOffset += scanlineStride;
+          outOffset += w;
+        }
+      }
+    return obj;
+  }
+  
+
+  public int[] getPixel(int x, int y, int[] iArray, DataBuffer data)
+  {
+    int offset = scanlineStride*y + x;
+    if (iArray == null) iArray = new int[numBands];
+    int samples = data.getElem(offset);
+
+    for (int b=0; b<numBands; b++)
+      iArray[b] = (samples & bitMasks[b]) >>> bitOffsets[b];
+	
+    return iArray;
+  }
+
+  public int[] getPixels(int x, int y, int w, int h, int[] iArray,
+			 DataBuffer data)
+  {
+    int offset = scanlineStride*y + x;
+    if (iArray == null) iArray = new int[numBands*w*h];
+    int outOffset = 0;
+    for (y=0; y<h; y++)
+      {
+	int lineOffset = offset;
+	for (x=0; x<w; x++)
+	  {
+	    int samples = data.getElem(lineOffset++);
+	    for (int b=0; b<numBands; b++)
+	      iArray[outOffset++] = (samples & bitMasks[b]) >>> bitOffsets[b];
+	  }
+	offset += scanlineStride;
+      }
+    return iArray;	
+  }
+
+  public int getSample(int x, int y, int b, DataBuffer data)
+  {
+    int offset = scanlineStride*y + x;
+    int samples = data.getElem(offset);
+    return (samples & bitMasks[b]) >>> bitOffsets[b];
+  }
+  
+  /**
+   * This method implements a more efficient way to set data elements than the default
+   * implementation of the super class. It sets the data elements line by line instead 
+   * of pixel by pixel.
+   * @param x The x-coordinate of the data elements in <code>obj</code>.
+   * @param y The y-coordinate of the data elements in <code>obj</code>.
+   * @param w The width of the data elements in <code>obj</code>.
+   * @param h The height of the data elements in <code>obj</code>.
+   * @param obj The primitive array containing the data elements to set.
+   * @param data The DataBuffer to store the data elements into.
+   * @see java.awt.image.SampleModel#setDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer)
+   */
+  public void setDataElements(int x, int y, int w, int h,
+				Object obj, DataBuffer data)
+  {
+    
+    Object pixelData;
+    switch (getTransferType())
+    {
+      case DataBuffer.TYPE_BYTE:
+        pixelData = ((DataBufferByte) data).getData();
+        break;
+       case DataBuffer.TYPE_USHORT:
+         pixelData = ((DataBufferUShort) data).getData();
+         break;
+       case DataBuffer.TYPE_INT:
+         pixelData = ((DataBufferInt) data).getData();
+         break;
+       default:
+          // Seems like the only sensible thing to do.
+          throw new ClassCastException();
+    }
+    
+    int inOffset = 0;
+    int dataOffset = scanlineStride*y + x + data.getOffset();
+    for (int yy=y; yy<(y+h); yy++)
+    {
+      System.arraycopy(obj,inOffset,pixelData,dataOffset,w);
+      dataOffset += scanlineStride;
+      inOffset += w;
+    }
+  }
+  
+  
+  public void setDataElements(int x, int y, Object obj, DataBuffer data)
+  {
+    int offset = scanlineStride*y + x + data.getOffset();
+    
+    int transferType = getTransferType();
+    if (getTransferType() != data.getDataType())
+      {
+	throw new IllegalArgumentException("transfer type ("+
+					   getTransferType()+"), "+
+					   "does not match data "+
+					   "buffer type (" +
+					   data.getDataType() +
+					   ").");
+      }
+
+    try
+      {
+	switch (transferType)
+	  {
+	  case DataBuffer.TYPE_BYTE:
+	    {
+	      DataBufferByte out = (DataBufferByte) data;
+	      byte[] in = (byte[]) obj;
+	      out.getData()[offset] = in[0];
+	      return;
+	    }
+	  case DataBuffer.TYPE_USHORT:
+	    {
+	      DataBufferUShort out = (DataBufferUShort) data;
+	      short[] in = (short[]) obj;
+	      out.getData()[offset] = in[0];
+	      return;
+	    }
+	  case DataBuffer.TYPE_INT:
+	    {
+	      DataBufferInt out = (DataBufferInt) data;
+	      int[] in = (int[]) obj;
+	      out.getData()[offset] = in[0];
+	      return;
+	    }
+	    // FIXME: Fill in the other possible types.
+	  default:
+	    throw new InternalError();
+	  }
+      }
+    catch (ArrayIndexOutOfBoundsException aioobe)
+      {
+	String msg = "While writing data elements" +
+	  ", x="+x+", y="+y+
+	  ", width="+width+", height="+height+
+	  ", scanlineStride="+scanlineStride+
+	  ", offset="+offset+
+	  ", data.getSize()="+data.getSize()+
+	  ", data.getOffset()="+data.getOffset()+
+	  ": " +
+	  aioobe;
+	throw new ArrayIndexOutOfBoundsException(msg);
+      }
+    }
+
+  public void setPixel(int x, int y, int[] iArray, DataBuffer data)
+  {
+    int offset = scanlineStride*y + x;
+    
+    int samples = 0;
+    for (int b=0; b<numBands; b++)
+      samples |= (iArray[b] << bitOffsets[b]) & bitMasks[b];
+
+    data.setElem(offset, samples);
+  }
+
+  /**
+   * This method implements a more efficient way to set pixels than the default
+   * implementation of the super class. It copies the pixel components directly
+   * from the input array instead of creating a intermediate buffer.
+   * @param x The x-coordinate of the pixel rectangle in <code>obj</code>.
+   * @param y The y-coordinate of the pixel rectangle in <code>obj</code>.
+   * @param w The width of the pixel rectangle in <code>obj</code>.
+   * @param h The height of the pixel rectangle in <code>obj</code>.
+   * @param iArray The primitive array containing the pixels to set.
+   * @param data The DataBuffer to store the pixels into.
+   * @see java.awt.image.SampleModel#setPixels(int, int, int, int, int[], java.awt.image.DataBuffer)
+   */
+  public void setPixels(int x, int y, int w, int h, int[] iArray,
+						DataBuffer data)
+  {
+    int inOffset = 0;
+    int[] pixel = new int[numBands];
+    for (int yy=y; yy<(y+h); yy++)
+     {
+      int offset = scanlineStride*yy + x;
+      for (int xx=x; xx<(x+w); xx++)
+       { 
+        int samples = 0;
+        for (int b=0; b<numBands; b++)
+          samples |= (iArray[inOffset+b] << bitOffsets[b]) & bitMasks[b];
+        data.setElem(0, offset, samples);
+        inOffset += numBands;
+        offset += 1;
+      }
+    }
+  }
+  
+  
+  public void setSample(int x, int y, int b, int s, DataBuffer data)
+  {
+    int offset = scanlineStride*y + x;
+    int samples = data.getElem(offset);
+    int bitMask = bitMasks[b];
+    samples &= ~bitMask;
+    samples |= (s << bitOffsets[b]) & bitMask;
+    data.setElem(offset, samples);
+  }
+  
+  /**
+   * Creates a String with some information about this SampleModel.
+   * @return A String describing this SampleModel.
+   * @see java.lang.Object#toString()
+   */
+  public String toString()
+  {
+    StringBuffer result = new StringBuffer();
+    result.append(getClass().getName());
+    result.append("[");
+    result.append("scanlineStride=").append(scanlineStride);
+    for(int i=0; i < bitMasks.length; i+=1)
+    {
+      result.append(", mask[").append(i).append("]=0x").append(Integer.toHexString(bitMasks[i]));
+    }
+    
+    result.append("]");
+    return result.toString();
+  }
+}