01: /*
02: * ============================================================================
03: * GNU Lesser General Public License
04: * ============================================================================
05: *
06: * JasperReports - Free Java report-generating library.
07: * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
08: *
09: * This library is free software; you can redistribute it and/or
10: * modify it under the terms of the GNU Lesser General Public
11: * License as published by the Free Software Foundation; either
12: * version 2.1 of the License, or (at your option) any later version.
13: *
14: * This library is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17: * Lesser General Public License for more details.
18: *
19: * You should have received a copy of the GNU Lesser General Public
20: * License along with this library; if not, write to the Free Software
21: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22: *
23: * JasperSoft Corporation
24: * 303 Second Street, Suite 450 North
25: * San Francisco, CA 94107
26: * http://www.jaspersoft.com
27: */
28: package net.sf.jasperreports.engine.util;
29:
30: import java.awt.Graphics;
31: import java.awt.Image;
32: import java.awt.image.BufferedImage;
33:
34: import net.sf.jasperreports.engine.JRException;
35: import net.sf.jasperreports.engine.JRRenderable;
36:
37: /**
38: * @author Teodor Danciu (teodord@users.sourceforge.net)
39: * @version $Id: JRAbstractImageEncoder.java 1664 2007-03-26 09:48:03Z lucianc $
40: */
41: public abstract class JRAbstractImageEncoder implements JRImageEncoder {
42:
43: /**
44: *
45: */
46: public byte[] encode(Image image, byte imageType)
47: throws JRException {
48: BufferedImage bi = null;
49:
50: if (image instanceof BufferedImage) {
51: bi = (BufferedImage) image;
52: } else {
53: bi = new BufferedImage(
54: image.getWidth(null),
55: image.getHeight(null),
56: // avoid creating JPEG images with transparency that would result
57: // in invalid image files for some viewers (browsers)
58: (imageType == JRRenderable.IMAGE_TYPE_GIF || imageType == JRRenderable.IMAGE_TYPE_PNG) ? BufferedImage.TYPE_INT_ARGB
59: : BufferedImage.TYPE_INT_RGB);
60:
61: Graphics g = bi.createGraphics();
62: g.drawImage(image, 0, 0, null);
63: g.dispose();
64: }
65:
66: return encode(bi, imageType);
67: }
68:
69: /**
70: *
71: */
72: public abstract byte[] encode(BufferedImage bi, byte imageType)
73: throws JRException;
74:
75: }
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