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// This example is from the book _Java AWT Reference_ by John Zukowski.
// Written by John Zukowski. Copyright (c) 1997 O'Reilly & Associates.
// You may study, use, modify, and distribute this example for any purpose.
// This example is provided WITHOUT WARRANTY either expressed or
import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.ColorModel;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageConsumer;
import java.awt.image.ImageFilter;
import java.awt.image.ImageProducer;
public class MainClass extends Applet {
Image i, j;
public void init() {
i = getImage(getDocumentBase(), "rosey.jpg");
j = createImage(new FilteredImageSource(i.getSource(), new DynamicFilter(250, 5, Color.yellow)));
}
public void paint(Graphics g) {
g.drawImage(j, 10, 10, this);
}
}
class DynamicFilter extends ImageFilter {
Color overlapColor;
int delay;
int imageWidth;
int imageHeight;
int iterations;
DynamicFilter(int delay, int iterations, Color color) {
this.delay = delay;
this.iterations = iterations;
overlapColor = color;
}
public void setDimensions(int width, int height) {
imageWidth = width;
imageHeight = height;
consumer.setDimensions(width, height);
}
public void setHints(int hints) {
consumer.setHints(ImageConsumer.RANDOMPIXELORDER);
}
public void resendTopDownLeftRight(ImageProducer ip) {
}
public void imageComplete(int status) {
if ((status == IMAGEERROR) || (status == IMAGEABORTED)) {
consumer.imageComplete(status);
return;
} else {
int xWidth = imageWidth / iterations;
if (xWidth <= 0)
xWidth = 1;
int newPixels[] = new int[xWidth * imageHeight];
int iColor = overlapColor.getRGB();
for (int x = 0; x < (xWidth * imageHeight); x++)
newPixels[x] = iColor;
int t = 0;
for (; t < (imageWidth - xWidth); t += xWidth) {
consumer.setPixels(t, 0, xWidth, imageHeight, ColorModel.getRGBdefault(), newPixels, 0,
xWidth);
consumer.imageComplete(ImageConsumer.SINGLEFRAMEDONE);
try {
Thread.sleep(delay);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
int left = imageWidth - t;
if (left > 0) {
consumer.setPixels(imageWidth - left, 0, left, imageHeight, ColorModel.getRGBdefault(),
newPixels, 0, xWidth);
consumer.imageComplete(ImageConsumer.SINGLEFRAMEDONE);
}
consumer.imageComplete(STATICIMAGEDONE);
}
}
}
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