/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -------------------
* KeypointPNGEncoderAdapter.java
* -------------------
* (C) Copyright 2004, by Richard Atkinson and Contributors.
*
* Original Author: Richard Atkinson;
* Contributor(s): -;
*
* $Id: KeypointPNGEncoderAdapter.java,v 1.1 2004/08/31 14:32:00 mungady Exp $
*
* Changes
* -------
* 01-Aug-2004 : Initial version (RA);
*
*/
package org.jfree.chart.encoders;
import com.keypoint.PngEncoder;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
/**
* Adapter class for the Keypoint PNG Encoder. The ImageEncoderFactory will only return a
* reference to this class by default if the library has been compiled under a JDK < 1.4 or
* is being run using a JDK < 1.4.
*
* @author Richard Atkinson
*/
public class KeypointPNGEncoderAdapter implements ImageEncoder {
private int quality = 9;
private boolean encodingAlpha = false;
/**
* Get the quality of the image encoding.
*
* @return A float representing the quality.
*/
public float getQuality() {
return this.quality;
}
/**
* Set the quality of the image encoding (supported).
*
* @param quality A float representing the quality.
*/
public void setQuality(float quality) {
this.quality = (int) quality;
}
/**
* Get whether the encoder should encode alpha transparency.
*
* @return Whether the encoder is encoding alpha transparency.
*/
public boolean isEncodingAlpha() {
return this.encodingAlpha;
}
/**
* Set whether the encoder should encode alpha transparency (supported).
*
* @param encodingAlpha Whether the encoder should encode alpha transparency.
*/
public void setEncodingAlpha(boolean encodingAlpha) {
this.encodingAlpha = encodingAlpha;
}
/**
* Encodes an image in PNG format.
*
* @param bufferedImage The image to be encoded.
* @return The byte[] that is the encoded image.
* @throws IOException
*/
public byte[] encode(BufferedImage bufferedImage) throws IOException {
if (bufferedImage == null) throw new IllegalArgumentException("Null 'image' argument.");
PngEncoder encoder = new PngEncoder(bufferedImage, this.encodingAlpha, 0, this.quality);
return encoder.pngEncode();
}
/**
* Encodes an image in PNG format and writes it to an OutputStream.
*
* @param bufferedImage The image to be encoded.
* @param outputStream The OutputStream to write the encoded image to.
* @throws IOException
*/
public void encode(BufferedImage bufferedImage, OutputStream outputStream) throws IOException {
if (bufferedImage == null) throw new IllegalArgumentException("Null 'image' argument.");
if (outputStream == null) throw new IllegalArgumentException("Null 'outputStream' argument.");
PngEncoder encoder = new PngEncoder(bufferedImage, this.encodingAlpha, 0, this.quality);
outputStream.write(encoder.pngEncode());
}
}