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DOS/V Power Report 1998 February
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VPR9802A.ISO
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APP_DEMO
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HighlightFilter.java
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1997-10-27
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/*
* @(#)HighlightFilter.java 1.4 96/12/06
*
* Copyright (c) 1994-1996 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
import java.applet.Applet;
import java.awt.Image;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.util.StringTokenizer;
import java.util.Vector;
import java.util.Hashtable;
import java.net.URL;
import java.awt.image.*;
import java.net.MalformedURLException;
/**
* An image filter to highlight an image by brightening or darkening
* the pixels in the images.
*
* @author Jim Graham
* @version 1.4, 12/06/96
*/
class HighlightFilter extends RGBImageFilter {
boolean brighter;
int percent;
public HighlightFilter(boolean b, int p) {
brighter = b;
percent = p;
canFilterIndexColorModel = true;
}
public int filterRGB(int x, int y, int rgb) {
int r = (rgb >> 16) & 0xff;
int g = (rgb >> 8) & 0xff;
int b = (rgb >> 0) & 0xff;
if (brighter) {
r = (255 - ((255 - r) * (100 - percent) / 100));
g = (255 - ((255 - g) * (100 - percent) / 100));
b = (255 - ((255 - b) * (100 - percent) / 100));
} else {
r = (r * (100 - percent) / 100);
g = (g * (100 - percent) / 100);
b = (b * (100 - percent) / 100);
}
if (r < 0) r = 0;
if (r > 255) r = 255;
if (g < 0) g = 0;
if (g > 255) g = 255;
if (b < 0) b = 0;
if (b > 255) b = 255;
return (rgb & 0xff000000) | (r << 16) | (g << 8) | (b << 0);
}
}