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Java > Open Source Codes > HighlightFilter


1 /*
2  * @(#)HighlightFilter.java 1.14 06/02/22
3  *
4  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * -Redistribution of source code must retain the above copyright notice, this
10  * list of conditions and the following disclaimer.
11  *
12  * -Redistribution in binary form must reproduce the above copyright notice,
13  * this list of conditions and the following disclaimer in the documentation
14  * and/or other materials provided with the distribution.
15  *
16  * Neither the name of Sun Microsystems, Inc. or the names of contributors may
17  * be used to endorse or promote products derived from this software without
18  * specific prior written permission.
19  *
20  * This software is provided "AS IS," without a warranty of any kind. ALL
21  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
22  * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
23  * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
24  * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
25  * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
26  * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
27  * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
28  * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
29  * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
30  * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
31  *
32  * You acknowledge that this software is not designed, licensed or intended
33  * for use in the design, construction, operation or maintenance of any
34  * nuclear facility.
35  */
36
37 /*
38  * @(#)HighlightFilter.java 1.14 06/02/22
39  */
40
41 import java.applet.Applet JavaDoc;
42 import java.awt.Image JavaDoc;
43 import java.awt.Graphics JavaDoc;
44 import java.awt.Rectangle JavaDoc;
45 import java.util.StringTokenizer JavaDoc;
46 import java.util.Vector JavaDoc;
47 import java.util.Hashtable JavaDoc;
48 import java.net.URL JavaDoc;
49 import java.awt.image.*;
50 import java.net.MalformedURLException JavaDoc;
51
52 /**
53  * An image filter to highlight an image by brightening or darkening
54  * the pixels in the images.
55  *
56  * @author Jim Graham
57  * @version 1.14, 02/22/06
58  */
59 class HighlightFilter extends RGBImageFilter {
60     boolean brighter;
61     int percent;
62
63     public HighlightFilter(boolean b, int p) {
64     brighter = b;
65     percent = p;
66     canFilterIndexColorModel = true;
67     }
68
69     public int filterRGB(int x, int y, int rgb) {
70     int r = (rgb >> 16) & 0xff;
71     int g = (rgb >> 8) & 0xff;
72     int b = (rgb >> 0) & 0xff;
73     if (brighter) {
74         r = (255 - ((255 - r) * (100 - percent) / 100));
75         g = (255 - ((255 - g) * (100 - percent) / 100));
76         b = (255 - ((255 - b) * (100 - percent) / 100));
77     } else {
78         r = (r * (100 - percent) / 100);
79         g = (g * (100 - percent) / 100);
80         b = (b * (100 - percent) / 100);
81     }
82     if (r < 0) r = 0;
83     if (r > 255) r = 255;
84     if (g < 0) g = 0;
85     if (g > 255) g = 255;
86     if (b < 0) b = 0;
87     if (b > 255) b = 255;
88     return (rgb & 0xff000000) | (r << 16) | (g << 8) | (b << 0);
89     }
90 }
91
92
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