/***********************************************************************************************
* Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
*
* Redistribution and use of this software and associated documentation ("Software"), with or
* without modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and notices.
* Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. The name "jCharts" or "Nathaniel G. Auvil" must not be used to endorse or promote
* products derived from this Software without prior written permission of Nathaniel G.
* Auvil. For written permission, please contact nathaniel_auvil@users.sourceforge.net
*
* 4. Products derived from this Software may not be called "jCharts" nor may "jCharts" appear
* in their names without prior written permission of Nathaniel G. Auvil. jCharts is a
* registered trademark of Nathaniel G. Auvil.
*
* 5. Due credit should be given to the jCharts Project (http://jcharts.sourceforge.net/).
*
* THIS SOFTWARE IS PROVIDED BY Nathaniel G. Auvil AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* jCharts OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
************************************************************************************************/
package org.krysalis.jcharts.encoders;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import org.krysalis.jcharts.Chart;
import org.krysalis.jcharts.chartData.ChartDataException;
import org.krysalis.jcharts.properties.PropertyException;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.io.IOException;
import java.io.OutputStream;
/*************************************************************************************
* Provided for backwards compatibility for jdk 1.3
*
* @author Nathaniel Auvil
* @version $Id: JPEGEncoder13.java,v 1.2 2003/05/26 13:40:20 nathaniel_auvil Exp $
************************************************************************************/
public class JPEGEncoder13
{
/******************************************************************************************
*
*
******************************************************************************************/
private JPEGEncoder13() throws Exception
{
throw new Exception( "No need to create an instance of this class!" );
}
/******************************************************************************************
* Encodes the chart to a JPEG format. If you are generating large dimension images, the file
* size can get quite large. You can try decreasing the quality to decrease the file size.
*
* @param outputStream
* @param quality float value from 0.0f(worst image quality) - 1.0f(best image quality)
* @throws ChartDataException
* @throws PropertyException
* @throws IOException
*******************************************************************************************/
public static void encode( Chart chart,
float quality,
OutputStream outputStream ) throws ChartDataException, PropertyException, IOException
{
BufferedImage bufferedImage = BinaryEncoderUtil.render( chart );
float[] sharpKernel = {0.0f, -1.0f, 0.0f,
-1.0f, 5.0f, -1.0f,
0.0f, -1.0f, 0.0f};
BufferedImageOp sharpen = new ConvolveOp( new Kernel( 3, 3, sharpKernel ), ConvolveOp.EDGE_NO_OP, null );
BufferedImage sharp = sharpen.filter( bufferedImage, null );
//---create an encoder object for the BufferedImage.
JPEGEncodeParam jpegParam = JPEGCodec.getDefaultJPEGEncodeParam( sharp );
jpegParam.setQuality( quality, false );
JPEGImageEncoder jpeg = JPEGCodec.createJPEGEncoder( outputStream, jpegParam );
//---encode the BufferedImage.
jpeg.encode( bufferedImage );
}
}