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-rw-r--r--java/gjt/image/BleachImageFilter.java53
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diff --git a/java/gjt/image/BleachImageFilter.java b/java/gjt/image/BleachImageFilter.java
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--- a/java/gjt/image/BleachImageFilter.java
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-package gjt.image;
-
-import java.awt.image.*;
-import gjt.Assert;
-
-/**
- * A derivation of RGBImageFilter that bleaches an image.<p>
- *
- * Extent of the bleaching effect is controlled by the only
- * constructor argument: an integer representing the percentage
- * of bleaching. The percentage of bleaching may also be
- * controlled after instantiation by invoking the
- * void percent(int) method.<p>
- *
- * @version 1.0, Apr 1 1996
- * @author David Geary
- * @see RGBImageFilter
- */
-public class BleachImageFilter extends RGBImageFilter {
- private int percent;
-
- public BleachImageFilter(int percent) {
- Assert.notFalse(percent >= 0 && percent <= 100);
- this.percent = percent;
- canFilterIndexColorModel = true;
- }
- public int percent() { return percent; }
- public void percent(int percent) { percent = percent; }
-
- public int filterRGB(int x, int y, int rgb) {
- DirectColorModel cm =
- (DirectColorModel)ColorModel.getRGBdefault();
-
- int alpha = cm.getAlpha(rgb);
- int red = cm.getRed (rgb);
- int green = cm.getGreen(rgb);
- int blue = cm.getBlue (rgb);
- double percentMultiplier = (double)percent/100;
-
- red = Math.min((int)
- (red + (red * percentMultiplier)), 255);
- green = Math.min((int)
- (green + (green * percentMultiplier)), 255);
- blue = Math.min((int)
- (blue + (blue * percentMultiplier)), 255);
-
- alpha = alpha << 24;
- red = red << 16;
- green = green << 8;
-
- return alpha | red | green | blue;
- }
-}