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gnu.java.awt

Class Buffers

public final class Buffers
extends Object
Utility class for creating and accessing data buffers of arbitrary data types.

Method Summary

static DataBuffer
createBuffer(int dataType, int size)
Create a data buffer of a particular type.
static DataBuffer
createBuffer(int dataType, int size, int numBanks)
Create a data buffer of a particular type.
static DataBuffer
createBuffer(int dataType, Object data, int size)
Create a data buffer of a particular type.
static DataBuffer
createBufferFromData(int dataType, Object data, int size)
Create a data buffer of a particular type.
static Object
getData(DataBuffer buffer)
Return the data array of a data buffer, regardless of the data type.
static Object
getData(DataBuffer src, int srcOffset, Object dest, int dstOffset, int length)
Copy data from array contained in data buffer, much like System.arraycopy.
static int
smallestAppropriateTransferType(int bits)

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

createBuffer

public static DataBuffer createBuffer(int dataType,
                                      int size)
Create a data buffer of a particular type.
Parameters:
dataType - the desired data type of the buffer.
size - the size of the data buffer bank

createBuffer

public static DataBuffer createBuffer(int dataType,
                                      int size,
                                      int numBanks)
Create a data buffer of a particular type.
Parameters:
dataType - the desired data type of the buffer.
size - the size of the data buffer bank
numBanks - the number of banks the buffer should have

createBuffer

public static DataBuffer createBuffer(int dataType,
                                      Object data,
                                      int size)
Create a data buffer of a particular type.
Parameters:
dataType - the desired data type of the buffer.
data - an array containing data, or null
size - the size of the data buffer bank

createBufferFromData

public static DataBuffer createBufferFromData(int dataType,
                                              Object data,
                                              int size)
Create a data buffer of a particular type.
Parameters:
dataType - the desired data type of the buffer
data - an array containing the data
size - the size of the data buffer bank

getData

public static Object getData(DataBuffer buffer)
Return the data array of a data buffer, regardless of the data type.
Returns:
an array of primitive values. The actual array type depends on the data type of the buffer.

getData

public static Object getData(DataBuffer src,
                             int srcOffset,
                             Object dest,
                             int dstOffset,
                             int length)
Copy data from array contained in data buffer, much like System.arraycopy. Create a suitable destination array if the given destination array is null.

smallestAppropriateTransferType

public static int smallestAppropriateTransferType(int bits)
Parameters:
bits - the width of a data element measured in bits
Returns:
the smallest data type that can store data elements of the given number of bits, without any truncation.
Buffers.java -- Copyright (C) 2000, 2002, 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.

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