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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. 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 .
*/
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.type.ImageTypeEnum;
/**
* @author Teodor Danciu ([email protected])
*/
public abstract class JRAbstractImageEncoder implements JRImageEncoder
{
@Override
public byte[] encode(Image image, ImageTypeEnum 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 == ImageTypeEnum.GIF || imageType == ImageTypeEnum.PNG)
? BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB
);
Graphics g = bi.createGraphics();
try
{
g.drawImage(image, 0, 0, null);
}
finally
{
g.dispose();
}
}
return encode(bi, imageType);
}
/**
*
*/
public abstract byte[] encode(BufferedImage bi, ImageTypeEnum imageType) throws JRException;
}