/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2009 Jaspersoft Corporation. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 JasperReports. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.jasperreports.engine.util;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRRenderable;
/**
* @author Teodor Danciu (teodord@users.sourceforge.net)
* @version $Id: JRAbstractImageEncoder.java 3034 2009-08-27 11:58:04Z teodord $
*/
public abstract class JRAbstractImageEncoder implements JRImageEncoder
{
/**
*
*/
public byte[] encode(Image image, byte imageType) throws JRException
{
BufferedImage bi = null;
if (image instanceof BufferedImage)
{
bi = (BufferedImage)image;
}
else
{
bi =
new BufferedImage(
image.getWidth(null),
image.getHeight(null),
// avoid creating JPEG images with transparency that would result
// in invalid image files for some viewers (browsers)
(imageType == JRRenderable.IMAGE_TYPE_GIF || imageType == JRRenderable.IMAGE_TYPE_PNG)
? BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB
);
Graphics g = bi.createGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
}
return encode(bi, imageType);
}
/**
*
*/
public abstract byte[] encode(BufferedImage bi, byte imageType) throws JRException;
}