1 files changed, 245 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/image/DataBufferByte.java b/libjava/classpath/java/awt/image/DataBufferByte.java
new file mode 100644
index 00000000000..1113ebb7843
--- /dev/null
+++ b/libjava/classpath/java/awt/image/DataBufferByte.java
@@ -0,0 +1,245 @@
+/* Copyright (C) 2000, 2002  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;
+
+/* This is one of several classes that are nearly identical. Maybe we
+   should have a central template and generate all these files. This
+   is one of the cases where templates or macros would have been
+   useful to have in Java.
+
+   This file has been created using search-replace. My only fear is
+   that these classes will grow out-of-sync as of a result of changes
+   that are not propagated to the other files. As always, mirroring
+   code is a maintenance nightmare.  */
+
+/**
+ * A {@link DataBuffer} that uses an array of <code>byte</code> primitives
+ * to represent each of its banks. 
+ * 
+ * @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
+ */
+public final class DataBufferByte extends DataBuffer
+{
+  private byte[] data;
+  private byte[][] bankData;
+  
+  /**
+   * Creates a new data buffer with a single data bank containing the 
+   * specified number of <code>byte</code> elements.
+   * 
+   * @param size the number of elements in the data bank.
+   */
+  public DataBufferByte(int size)
+  {
+    super(TYPE_BYTE, size, 1, 0);
+    bankData = new byte[1][];
+    data = new byte[size];
+    bankData[0] = data;
+  }
+
+  /**
+   * Creates a new data buffer with the specified number of data banks, 
+   * each containing the specified number of <code>byte</code> elements.
+   * 
+   * @param size the number of elements in the data bank.
+   * @param numBanks the number of data banks.
+   */
+  public DataBufferByte(int size, int numBanks)
+  {
+    super(TYPE_BYTE, size, numBanks);
+    bankData = new byte[numBanks][size];
+    data = bankData[0];
+  }
+
+  /**
+   * Creates a new data buffer backed by the specified data bank.
+   * <p>
+   * Note: there is no exception when <code>dataArray</code> is 
+   * <code>null</code>, but in that case an exception will be thrown
+   * later if you attempt to access the data buffer.
+   * 
+   * @param dataArray the data bank.
+   * @param size the number of elements in the data bank.
+   */
+  public DataBufferByte(byte[] dataArray, int size)
+  {
+    super(TYPE_BYTE, size, 1, 0);
+    bankData = new byte[1][];
+    data = dataArray;
+    bankData[0] = data;
+  }
+    
+  /**
+   * Creates a new data buffer backed by the specified data bank, with
+   * the specified offset to the first element.
+   * <p>
+   * Note: there is no exception when <code>dataArray</code> is 
+   * <code>null</code>, but in that case an exception will be thrown
+   * later if you attempt to access the data buffer.
+   * 
+   * @param dataArray the data bank.
+   * @param size the number of elements in the data bank.
+   * @param offset the offset to the first element in the array.
+   */
+  public DataBufferByte(byte[] dataArray, int size, int offset)
+  {
+    super(TYPE_BYTE, size, 1, offset);
+    bankData = new byte[1][];
+    data = dataArray;
+    bankData[0] = data;
+  }
+
+  /**
+   * Creates a new data buffer backed by the specified data banks.
+   * 
+   * @param dataArray the data banks.
+   * @param size the number of elements in the data bank.
+   * 
+   * @throws NullPointerException if <code>dataArray</code> is 
+   *         <code>null</code>.
+   */
+  public DataBufferByte(byte[][] dataArray, int size)
+  {
+    super(TYPE_BYTE, size, dataArray.length);
+    bankData = dataArray;
+    data = bankData[0];
+  }
+
+  /**
+   * Creates a new data buffer backed by the specified data banks, with
+   * the specified offsets to the first element in each bank.
+   * 
+   * @param dataArray the data banks.
+   * @param size the number of elements in the data bank.
+   * @param offsets the offsets to the first element in each data bank.
+   * 
+   * @throws NullPointerException if <code>dataArray</code> is 
+   *         <code>null</code>.
+   */
+  public DataBufferByte(byte[][] dataArray, int size, int[] offsets)
+  {
+    super(TYPE_BYTE, size, dataArray.length, offsets);
+    bankData = dataArray;
+    data = bankData[0];
+  }
+
+  /**
+   * Returns the first data bank.
+   * 
+   * @return The first data bank.
+   */
+  public byte[] getData()
+  {
+    return data;
+  }
+    
+  /**
+   * Returns a data bank.
+   * 
+   * @param bank the bank index.
+   * @return A data bank.
+   */
+  public byte[] getData(int bank) 
+  {
+    return bankData[bank];
+  }
+    
+  /**
+   * Returns the array underlying this <code>DataBuffer</code>.
+   * 
+   * @return The data banks.
+   */
+  public byte[][] getBankData()
+  {
+    return bankData;
+  }
+  
+  /**
+   * Returns an element from the first data bank.  The offset (specified in
+   * the constructor) is added to <code>i</code> before accessing the 
+   * underlying data array.
+   * 
+   * @param i the element index.
+   * @return The element.
+   */
+  public int getElem(int i)
+  {
+    return data[i+offset] & 0xff; // get unsigned byte as int
+  }
+  
+  /**
+   * Returns an element from a particular data bank.  The offset (specified in
+   * the constructor) is added to <code>i</code> before accessing the 
+   * underlying data array.
+   * 
+   * @param bank the bank index.
+   * @param i the element index.
+   * @return The element.
+   */
+  public int getElem(int bank, int i)
+  {
+    // get unsigned byte as int
+    return bankData[bank][i+offsets[bank]] & 0xff;
+  }
+
+  /**
+   * Sets an element in the first data bank.  The offset (specified in the
+   * constructor) is added to <code>i</code> before updating the underlying
+   * data array.
+   * 
+   * @param i the element index.
+   * @param val the new element value.
+   */
+  public void setElem(int i, int val)
+  {
+    data[i+offset] = (byte) val;
+  }
+
+  /**
+   * Sets an element in a particular data bank.  The offset (specified in the
+   * constructor) is added to <code>i</code> before updating the underlying
+   * data array.
+   * 
+   * @param bank the data bank index.
+   * @param i the element index.
+   * @param val the new element value.
+   */
+  public void setElem(int bank, int i, int val)
+  {
+    bankData[bank][i+offsets[bank]] = (byte) val;
+  }
+}