/* An actor that produces a JAIImageToken with constant bands.
@Copyright (c) 2003-2007 The Regents of the University of California.
All rights reserved.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the
above copyright notice and the following two paragraphs appear in all
copies of this software.
IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
ENHANCEMENTS, OR MODIFICATIONS.
PT_COPYRIGHT_VERSION 2
COPYRIGHTENDKEY
*/
package ptolemy.actor.lib.jai;
import java.awt.image.renderable.ParameterBlock;
import javax.media.jai.JAI;
import javax.media.jai.RenderedOp;
import ptolemy.actor.lib.Source;
import ptolemy.data.ArrayToken;
import ptolemy.data.IntToken;
import ptolemy.data.ScalarToken;
import ptolemy.data.Token;
import ptolemy.data.expr.Parameter;
import ptolemy.data.type.BaseType;
import ptolemy.kernel.CompositeEntity;
import ptolemy.kernel.util.Attribute;
import ptolemy.kernel.util.IllegalActionException;
import ptolemy.kernel.util.NameDuplicationException;
import ptolemy.kernel.util.StringAttribute;
//////////////////////////////////////////////////////////////////////////
//// JAIConstant
/**
Produce an image with a uniform color.
@author James Yeh, Steve Neuendorffer
@version $Id$
@since Ptolemy II 4.0
@Pt.ProposedRating Red (cxh)
@Pt.AcceptedRating Red (cxh)
*/
public class JAIConstant extends Source {
/** Construct an actor with the given container and name.
* @param container The container.
* @param name The name of this actor.
* @exception IllegalActionException If the actor cannot be contained
* by the proposed container.
* @exception NameDuplicationException If the container already has an
* actor with this name.
*/
public JAIConstant(CompositeEntity container, String name)
throws IllegalActionException, NameDuplicationException {
super(container, name);
output.setTypeEquals(BaseType.OBJECT);
width = new Parameter(this, "width", new IntToken(0));
height = new Parameter(this, "height", new IntToken(0));
bandValues = new Parameter(this, "bandValues", new ArrayToken(
BaseType.INT, _defaultValues));
dataFormat = new StringAttribute(this, "dataFormat");
dataFormat.setExpression("byte");
_dataFormat = _BYTE;
}
///////////////////////////////////////////////////////////////////
//// ports and parameters ////
/** The band values of the image. The default value is an Array
* of 1 integer of value 0.
*/
public Parameter bandValues;
/** The height of the image in pixels. The default value is
* and integer with a value of 0.
*/
public Parameter height;
/** The width of the image in pixels. The default value is
* and integer with a value of 0.
*/
public Parameter width;
/** The type to cast the data to. This is a string valued
* attribute that defaults to "byte". Other valid types
* are "double", "float", "int" and "short".
*/
public StringAttribute dataFormat;
///////////////////////////////////////////////////////////////////
//// public methods ////
public void attributeChanged(Attribute attribute)
throws IllegalActionException {
if (attribute == bandValues) {
values = ((ArrayToken) bandValues.getToken()).arrayValue();
//_bandValues = new Double[values.length];
//for (int i = 0; i < values.length; i++) {
// _bandValues[i] =
// Double.valueOf(((DoubleToken)values[i]).doubleValue());
//}
} else if (attribute == height) {
_height = ((IntToken) height.getToken()).intValue();
} else if (attribute == width) {
_width = ((IntToken) width.getToken()).intValue();
} else if (attribute == dataFormat) {
String dataFormatName = dataFormat.getExpression();
if (dataFormatName.equals("byte")) {
_dataFormat = _BYTE;
} else if (dataFormatName.equals("double")) {
_dataFormat = _DOUBLE;
} else if (dataFormatName.equals("float")) {
_dataFormat = _FLOAT;
} else if (dataFormatName.equals("int")) {
_dataFormat = _INT;
} else if (dataFormatName.equals("short")) {
_dataFormat = _SHORT;
} else {
throw new IllegalActionException(this,
"Unrecognized data type: " + dataFormatName);
}
} else {
super.attributeChanged(attribute);
}
}
public void fire() throws IllegalActionException {
super.fire();
ParameterBlock parameters = new ParameterBlock();
parameters.add((float) _width);
parameters.add((float) _height);
//parameters.add(_bandValues);
if (_dataFormat == _BYTE) {
Byte[] byteValues = new Byte[values.length];
for (int i = 0; i < values.length; i++) {
byteValues[i] = Byte.valueOf((byte) (((ScalarToken) values[i])
.intValue()));
}
parameters.add(byteValues);
} else if (_dataFormat == _DOUBLE) {
Double[] doubleValues = new Double[values.length];
for (int i = 0; i < values.length; i++) {
doubleValues[i] = Double.valueOf(((ScalarToken) values[i])
.doubleValue());
}
parameters.add(doubleValues);
} else if (_dataFormat == _FLOAT) {
Float[] floatValues = new Float[values.length];
for (int i = 0; i < values.length; i++) {
floatValues[i] = Float
.valueOf((float) (((ScalarToken) values[i])
.doubleValue()));
}
parameters.add(floatValues);
} else if (_dataFormat == _INT) {
Integer[] intValues = new Integer[values.length];
for (int i = 0; i < values.length; i++) {
intValues[i] = Integer.valueOf(((ScalarToken) values[i])
.intValue());
}
parameters.add(intValues);
} else if (_dataFormat == _SHORT) {
Short[] shortValues = new Short[values.length];
for (int i = 0; i < values.length; i++) {
shortValues[i] = Short
.valueOf((short) (((ScalarToken) values[i]).intValue()));
}
parameters.add(shortValues);
}
RenderedOp newImage = JAI.create("constant", parameters);
output.send(0, new JAIImageToken(newImage));
}
///////////////////////////////////////////////////////////////////
//// private variables ////
private IntToken _zero = new IntToken(0);
private IntToken[] _defaultValues = { _zero };
//private Double[] _bandValues;
private int _height;
private int _width;
private Token[] values;
private int _dataFormat;
// Constants used for more efficient execution.
private static final int _BYTE = 0;
private static final int _DOUBLE = 1;
private static final int _FLOAT = 2;
private static final int _INT = 3;
private static final int _SHORT = 4;
}