/*
* $RCSfile: ImageEncoderImpl.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:55:31 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.codec;
import java.awt.image.ColorModel;
import java.awt.image.Raster;
import java.awt.image.RenderedImage;
import java.io.IOException;
import java.io.OutputStream;
import com.lightcrafts.media.jai.codecimpl.SingleTileRenderedImage;
/**
* A partial implementation of the ImageEncoder interface useful for
* subclassing.
*
* <p><b> This class is not a committed part of the JAI API. It may
* be removed or changed in future releases of JAI.</b>
*/
public abstract class ImageEncoderImpl implements ImageEncoder {
/** The OutputStream associcted with this ImageEncoder. */
protected OutputStream output;
/** The ImageEncodeParam object associcted with this ImageEncoder. */
protected ImageEncodeParam param;
/**
* Constructs an ImageEncoderImpl with a given OutputStream
* and ImageEncoderParam instance.
*/
public ImageEncoderImpl(OutputStream output,
ImageEncodeParam param) {
this.output = output;
this.param = param;
}
/**
* Returns the current parameters as an instance of the
* ImageEncodeParam interface. Concrete implementations of this
* interface will return corresponding concrete implementations of
* the ImageEncodeParam interface. For example, a JPEGImageEncoder
* will return an instance of JPEGEncodeParam.
*/
public ImageEncodeParam getParam() {
return param;
}
/**
* Sets the current parameters to an instance of the
* ImageEncodeParam interface. Concrete implementations
* of ImageEncoder may throw a RuntimeException if the
* params argument is not an instance of the appropriate
* subclass or subinterface. For example, a JPEGImageEncoder
* will expect param to be an instance of JPEGEncodeParam.
*/
public void setParam(ImageEncodeParam param) {
this.param = param;
}
/** Returns the OutputStream associated with this ImageEncoder. */
public OutputStream getOutputStream() {
return output;
}
/**
* Encodes a Raster with a given ColorModel and writes the output
* to the OutputStream associated with this ImageEncoder.
*/
public void encode(Raster ras, ColorModel cm) throws IOException {
RenderedImage im = new SingleTileRenderedImage(ras, cm);
encode(im);
}
/**
* Encodes a RenderedImage and writes the output to the
* OutputStream associated with this ImageEncoder.
*/
public abstract void encode(RenderedImage im) throws IOException;
}