/*
* $RCSfile: DataBufferState.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:50 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.rmi;
import java.awt.RenderingHints;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.DataBufferInt;
import java.awt.image.DataBufferShort;
import java.awt.image.DataBufferUShort;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import com.lightcrafts.media.jai.util.DataBufferUtils;
/**
* This class is a serializable proxy for a DataBuffer from which the
* DataBuffer may be reconstituted.
*
*
* @since 1.1
*/
public class DataBufferState extends SerializableStateImpl {
/** DataBufferFloat and DataBufferDouble core classes or null. */
private static Class[] J2DDataBufferClasses = null;
/** The DataBuffer. */
private transient DataBuffer dataBuffer;
// Initialize J2DDataBufferClasses.
static {
try {
Class dbfClass = Class.forName("java.awt.image.DataBufferFloat");
Class dbdClass = Class.forName("java.awt.image.DataBufferDouble");
J2DDataBufferClasses = new Class[] {dbfClass, dbdClass};
} catch(ClassNotFoundException e) {
// Ignore the exception.
}
}
public static Class[] getSupportedClasses() {
Class[] supportedClasses = null;
if(J2DDataBufferClasses != null) {
// Java 2 1.4.0 and higher.
supportedClasses = new Class[] {
DataBufferByte.class,
DataBufferShort.class,
DataBufferUShort.class,
DataBufferInt.class,
J2DDataBufferClasses[0],
J2DDataBufferClasses[1],
com.lightcrafts.mediax.jai.DataBufferFloat.class,
com.lightcrafts.mediax.jai.DataBufferDouble.class,
com.lightcrafts.media.jai.codecimpl.util.DataBufferFloat.class,
com.lightcrafts.media.jai.codecimpl.util.DataBufferDouble.class
};
} else {
// Java 2 pre-1.4.0.
supportedClasses = new Class[] {
DataBufferByte.class,
DataBufferShort.class,
DataBufferUShort.class,
DataBufferInt.class,
com.lightcrafts.mediax.jai.DataBufferFloat.class,
com.lightcrafts.mediax.jai.DataBufferDouble.class,
com.lightcrafts.media.jai.codecimpl.util.DataBufferFloat.class,
com.lightcrafts.media.jai.codecimpl.util.DataBufferDouble.class
};
}
return supportedClasses;
}
/**
* Constructs a <code>DataBufferState</code> from a
* <code>DataBuffer</code>.
*
* @param source The <code>DataBuffer</code> to be serialized.
* @param o The <code>SampleModel</code> to be serialized.
* @param h The <code>RenderingHints</code> (ignored).
*/
public DataBufferState(Class c, Object o, RenderingHints h) {
super(c, o, h);
}
// XXX Note that there is potential for some form of data compression in
// the readObject() and writeObject() methods.
/**
* Serialize the <code>DataBufferState</code>.
*
* @param out The <code>ObjectOutputStream</code>.
*/
private void writeObject(ObjectOutputStream out) throws IOException {
DataBuffer dataBuffer = (DataBuffer)theObject;
// Write serialized form to the stream.
int dataType = dataBuffer.getDataType();
out.writeInt(dataType);
out.writeObject(dataBuffer.getOffsets());
out.writeInt(dataBuffer.getSize());
Object dataArray = null;
switch (dataType) {
case DataBuffer.TYPE_BYTE:
dataArray = ((DataBufferByte)dataBuffer).getBankData();
break;
case DataBuffer.TYPE_SHORT:
dataArray = ((DataBufferShort)dataBuffer).getBankData();
break;
case DataBuffer.TYPE_USHORT:
dataArray = ((DataBufferUShort)dataBuffer).getBankData();
break;
case DataBuffer.TYPE_INT:
dataArray = ((DataBufferInt)dataBuffer).getBankData();
break;
case DataBuffer.TYPE_FLOAT:
dataArray = DataBufferUtils.getBankDataFloat(dataBuffer);
break;
case DataBuffer.TYPE_DOUBLE:
dataArray = DataBufferUtils.getBankDataDouble(dataBuffer);
break;
default:
throw new RuntimeException(JaiI18N.getString("DataBufferState0"));
}
out.writeObject(dataArray);
}
/**
* Deserialize the <code>DataBufferState</code>.
*
* @param out The <code>ObjectInputStream</code>.
*/
private void readObject(ObjectInputStream in)
throws IOException, ClassNotFoundException {
DataBuffer dataBuffer = null;
// Read serialized form from the stream.
int dataType = -1;
int[] offsets = null;
int size = -1;
Object dataArray = null;
dataType = in.readInt();
offsets = (int[])in.readObject();
size = in.readInt();
dataArray = in.readObject();
// Restore the transient DataBuffer.
switch (dataType) {
case DataBuffer.TYPE_BYTE:
dataBuffer =
new DataBufferByte((byte[][])dataArray, size, offsets);
break;
case DataBuffer.TYPE_SHORT:
dataBuffer =
new DataBufferShort((short[][])dataArray, size, offsets);
break;
case DataBuffer.TYPE_USHORT:
dataBuffer =
new DataBufferUShort((short[][])dataArray, size, offsets);
break;
case DataBuffer.TYPE_INT:
dataBuffer =
new DataBufferInt((int[][])dataArray, size, offsets);
break;
case DataBuffer.TYPE_FLOAT:
dataBuffer =
DataBufferUtils.createDataBufferFloat((float[][])dataArray, size, offsets);
break;
case DataBuffer.TYPE_DOUBLE:
dataBuffer =
DataBufferUtils.createDataBufferDouble((double[][])dataArray, size, offsets);
break;
default:
throw new RuntimeException(JaiI18N.getString("DataBufferState0"));
}
theObject = dataBuffer;
}
}