ColorModel.java: New file...

2000-07-23  Rolf W. Rasmussen  <rolfwr@ii.uib.no>

	* libjava/java/awt/image/ColorModel.java: New file, replaces the
	stub libjava/java/awt/ColorModel.java which was located in the
	wrong package.
	* libjava/java/awt/image/ComponentColorModel.java: New file.
	* libjava/java/awt/image/ComponentSampleModel.java: New file.
	* libjava/java/awt/image/DataBuffer.java: New file.
	* libjava/java/awt/image/DataBufferByte.java: New file.
	* libjava/java/awt/image/DataBufferInt.java: New file.
	* libjava/java/awt/image/DataBufferUShort.java: New file.
	* libjava/java/awt/image/DirectColorModel.java: New file.
	* libjava/java/awt/image/PackedColorModel.java: New file.
	* libjava/java/awt/image/Raster.java: New file.
	* libjava/java/awt/image/SampleModel.java: New file.
	* libjava/java/awt/image/SinglePixelPackedSampleModel.java: New
	file.
	* libjava/java/awt/image/IndexColorModel.java: New file.
	* libjava/java/awt/image/ImageConsumer.java: Removed import of
	java.awt.ColorModel stub.

	* gnu/gcj/util/BitMaskExtent.java: New file, utility class.
	* gnu/gcj/util/Buffers.java: New file, utility class.

	* libjava/Makefile.am: Updated to include new files.
	* libjava/Makefile.in: Rebuilt.

From-SVN: r35245

2 files changed, 219 insertions, 0 deletions

diff --git a/libjava/gnu/gcj/awt/BitMaskExtent.java b/libjava/gnu/gcj/awt/BitMaskExtent.java
new file mode 100644
index 0000000..2da39f8
--- /dev/null
+++ b/libjava/gnu/gcj/awt/BitMaskExtent.java
@@ -0,0 +1,51 @@
+/* Copyright © 2000  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.awt;
+
+/** 
+ * Simple transparent utility class that can be used to perform bit
+ * mask extent calculations.
+ */
+public final class BitMaskExtent
+{
+  /** The number of the least significant bit of the bit mask extent. */
+  public byte leastSignificantBit;
+
+  /** The number of bits in the bit mask extent. */
+  public byte bitWidth;
+  
+  /**
+   * Set the bit mask. This will calculate and set the leastSignificantBit
+   * and bitWidth fields.
+   *
+   * @see #leastSignificantBit
+   * @see #bitWidth
+   */
+  public void setMask(long mask)
+  {
+    leastSignificantBit = 0;
+    bitWidth = 0;
+    if (mask == 0) return;
+    long shiftMask = mask;
+    for (; (shiftMask&1) == 0; shiftMask >>>=1) leastSignificantBit++;
+    for (; (shiftMask&1) != 0; shiftMask >>>=1) bitWidth++;
+    
+    if (shiftMask != 0)
+      throw new IllegalArgumentException("mask must be continuous");
+  }
+  
+  /** 
+   * Calculate the bit mask based on the values of the
+   * leastSignificantBit and bitWidth fields.
+   */
+  public long toMask()
+  {
+    return ((1<<bitWidth)-1) << leastSignificantBit;
+  }  
+}
diff --git a/libjava/gnu/gcj/awt/Buffers.java b/libjava/gnu/gcj/awt/Buffers.java
new file mode 100644
index 0000000..d4ad3a8
--- /dev/null
+++ b/libjava/gnu/gcj/awt/Buffers.java
@@ -0,0 +1,168 @@
+/* Copyright © 2000  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.awt;
+
+import java.awt.image.*;
+
+/** 
+ * Utility class for creating and accessing data buffers of arbitrary
+ * data types.
+ */
+public final class Buffers
+{
+  /**
+   * Create a data buffer of a particular type.
+   *
+   * @param dataType the desired data type of the buffer.
+   * @param data an array containing data, or null
+   * @param size the size of the data buffer bank
+   */
+  public static DataBuffer createBuffer(int dataType, Object data,
+					int size)
+  {
+    if (data == null) return createBuffer(dataType, size, 1);
+
+    return createBufferFromData(dataType, data, size);
+  }
+
+
+  /**
+   * Create a data buffer of a particular type.
+   *
+   * @param dataType the desired data type of the buffer.
+   * @param size the size of the data buffer bank
+   */
+  public static DataBuffer createBuffer(int dataType, int size) {
+    return createBuffer(dataType, size, 1);
+  }
+
+  /**
+   * Create a data buffer of a particular type.
+   *
+   * @param dataType the desired data type of the buffer.
+   * @param size the size of the data buffer bank
+   * @param numBanks the number of banks the buffer should have
+   */
+  public static DataBuffer createBuffer(int dataType, int size, int numBanks)
+  {
+    switch (dataType)
+      {
+      case DataBuffer.TYPE_BYTE:
+	return new DataBufferByte(size, numBanks);
+      case DataBuffer.TYPE_USHORT:
+	return new DataBufferUShort(size, numBanks);
+      case DataBuffer.TYPE_INT:
+	return new DataBufferInt(size, numBanks);
+      default:
+	throw new UnsupportedOperationException();
+      }
+  }
+  
+  /**
+   * Create a data buffer of a particular type.
+   *
+   * @param dataType the desired data type of the buffer
+   * @param data an array containing the data
+   * @param size the size of the data buffer bank
+   */
+  public static DataBuffer createBufferFromData(int dataType, Object data,
+						int size)
+  {
+    switch (dataType)
+      {
+      case DataBuffer.TYPE_BYTE:
+	return new DataBufferByte((byte[]) data, size);
+      case DataBuffer.TYPE_USHORT:
+	return new DataBufferUShort((short[]) data, size);
+      case DataBuffer.TYPE_INT:
+	return new DataBufferInt((int[]) data, size);
+      default:
+	throw new UnsupportedOperationException();
+      }
+  }
+
+  /** 
+   * Return the data array of a data buffer, regardless of the data
+   * type.
+   *
+   * @return an array of primitive values. The actual array type
+   * depends on the data type of the buffer.
+   */
+  public static Object getData(DataBuffer buffer)
+  {
+    if (buffer instanceof DataBufferByte)
+      return ((DataBufferByte) buffer).getData();
+    if (buffer instanceof DataBufferUShort)
+      return ((DataBufferUShort) buffer).getData();
+    if (buffer instanceof DataBufferInt)
+      return ((DataBufferInt) buffer).getData();
+    throw new ClassCastException("Unknown data buffer type");
+  }
+
+    
+  /**
+   * Copy data from array contained in data buffer, much like
+   * System.arraycopy. Create a suitable destination array if the
+   * given destination array is null.
+   */
+  public static Object getData(DataBuffer src, int srcOffset,
+			       Object dest,  int destOffset,
+			       int length)
+  {
+    Object from;
+    if (src instanceof DataBufferByte)
+      {
+	from = ((DataBufferByte) src).getData();
+	if (dest == null) dest = new byte[length+destOffset];
+      }
+    else if (src instanceof DataBufferUShort)
+      {
+	from = ((DataBufferUShort) src).getData();
+	if (dest == null) dest = new short[length+destOffset];
+      }
+    else if (src instanceof DataBufferInt)
+      {
+	from = ((DataBufferInt) src).getData();
+	if (dest == null) dest = new int[length+destOffset];
+      }
+    else
+      {
+	throw new ClassCastException("Unknown data buffer type");
+      }
+    
+    System.arraycopy(from, srcOffset, dest, destOffset, length);
+    return dest;
+  }
+  
+  /**
+   * @param bits the width of a data element measured in bits
+   *
+   * @return the smallest data type that can store data elements of
+   * the given number of bits, without any truncation.
+   */
+  public static int smallestAppropriateTransferType(int bits)
+  {
+    if (bits <= 8)
+      {
+	return DataBuffer.TYPE_BYTE;
+      }
+    else if (bits <= 16)
+      {
+	return DataBuffer.TYPE_USHORT;
+      } 
+    else if (bits <= 32)
+      {
+	return DataBuffer.TYPE_INT;
+      }
+    else
+      {
+	return DataBuffer.TYPE_UNDEFINED;
+      }
+  }
+}