01: /*
02: * This file is part of the Echo Web Application Framework (hereinafter "Echo").
03: * Copyright (C) 2002-2005 NextApp, Inc.
04: *
05: * Version: MPL 1.1/GPL 2.0/LGPL 2.1
06: *
07: * The contents of this file are subject to the Mozilla Public License Version
08: * 1.1 (the "License"); you may not use this file except in compliance with
09: * the License. You may obtain a copy of the License at
10: * http://www.mozilla.org/MPL/
11: *
12: * Software distributed under the License is distributed on an "AS IS" basis,
13: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14: * for the specific language governing rights and limitations under the
15: * License.
16: *
17: * Alternatively, the contents of this file may be used under the terms of
18: * either the GNU General Public License Version 2 or later (the "GPL"), or
19: * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20: * in which case the provisions of the GPL or the LGPL are applicable instead
21: * of those above. If you wish to allow use of your version of this file only
22: * under the terms of either the GPL or the LGPL, and not to allow others to
23: * use your version of this file under the terms of the MPL, indicate your
24: * decision by deleting the provisions above and replace them with the notice
25: * and other provisions required by the GPL or the LGPL. If you do not delete
26: * the provisions above, a recipient may use your version of this file under
27: * the terms of any one of the MPL, the GPL or the LGPL.
28: */
29:
30: package nextapp.echo2.webcontainer.image;
31:
32: import java.awt.Graphics;
33: import java.awt.Image;
34: import java.awt.image.PixelGrabber;
35: import java.awt.image.BufferedImage;
36:
37: import javax.swing.ImageIcon;
38:
39: class ImageToBufferedImage {
40:
41: static BufferedImage toBufferedImage(Image image) {
42: if (image instanceof BufferedImage) {
43: // Return image unchanged if it is already a BufferedImage.
44: return (BufferedImage) image;
45: }
46:
47: // Ensure image is loaded.
48: image = new ImageIcon(image).getImage();
49:
50: int type = hasAlpha(image) ? BufferedImage.TYPE_INT_RGB
51: : BufferedImage.TYPE_INT_ARGB;
52: BufferedImage bufferedImage = new BufferedImage(image
53: .getWidth(null), image.getHeight(null), type);
54: Graphics g = bufferedImage.createGraphics();
55: g.drawImage(image, 0, 0, null);
56: g.dispose();
57:
58: return bufferedImage;
59: }
60:
61: static boolean hasAlpha(Image image) {
62: PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
63: try {
64: pg.grabPixels();
65: } catch (InterruptedException ex) {
66: }
67: return pg.getColorModel().hasAlpha();
68: }
69:
70: /**
71: * Non-instantiable class.
72: */
73: private ImageToBufferedImage() {
74: }
75: }
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