Ptidej-v5.2-master/Ptidej Reporting Tests/src/net/sf/jasperreports/engine/util/JRAbstractImageEncoder.java
/*
 * ============================================================================
 * GNU Lesser General Public License
 * ============================================================================
 *
 * JasperReports - Free Java report-generating library.
 * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
 * 
 * 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.
 * 
 * JasperSoft Corporation
 * 303 Second Street, Suite 450 North
 * San Francisco, CA 94107
 * http://www.jaspersoft.com
 */
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,v 1.1 2008/09/29 16:20:16 guehene Exp $
 */
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;


}
