/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------------------------
* KeypointPNGEncoderAdapter.java
* ------------------------------
* (C) Copyright 2004-2008, by Richard Atkinson and Contributors.
*
* Original Author: Richard Atkinson;
* Contributor(s): -;
*
* Changes
* -------
* 01-Aug-2004 : Initial version (RA);
* 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
*
*/
package org.jfree.chart.encoders;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import com.keypoint.PngEncoder;
/**
* 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.
*/
public class KeypointPNGEncoderAdapter implements ImageEncoder {
/** The quality setting. */
private int quality = 9;
/** Encode alpha? */
private boolean encodingAlpha = false;
/**
* Get the quality of the image encoding. The underlying encoder uses int
* values: 0 for no compression, and values 1 through 9 for various levels
* of compression (1 is best speed, 9 is best compression).
*
* @return A float representing the quality.
*/
public float getQuality() {
return this.quality;
}
/**
* Set the quality of the image encoding (supported). The underlying
* encoder uses int values: 0 for no compression, and values 1 through 9
* for various levels of compression (1 is best speed, 9 is best
* compression).
*
* @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
* <code>OutputStream</code>.
*
* @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());
}
}
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