Source Code : Make image Transparency

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Make image Transparency

 
//package mw.client.utils.gui;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.awt.image.ImageProducer;
import java.awt.image.RGBImageFilter;

public class Transparency {
  public static Image makeColorTransparent(Image im, final Color color) {
    ImageFilter filter = new RGBImageFilter() {
      // the color we are looking for... Alpha bits are set to opaque
      public int markerRGB = color.getRGB() | 0xFF000000;

      @Override
      public final int filterRGB(int x, int y, int rgb) {
        if ((rgb | 0xFF000000) == markerRGB) {
          // Mark the alpha bits as zero - transparent
          return 0x00FFFFFF & rgb;
        } else {
          // nothing to do
          return rgb;
        }
      }
    };

    ImageProducer ip = new FilteredImageSource(im.getSource(), filter);
    return Toolkit.getDefaultToolkit().createImage(ip);
  }

  public static BufferedImage makeImageTranslucent(BufferedImage source,
      double alpha) {
    BufferedImage target = new BufferedImage(source.getWidth(),
        source.getHeight(), java.awt.Transparency.TRANSLUCENT);
    // Get the images graphics
    Graphics2D g = target.createGraphics();
    // Set the Graphics composite to Alpha
    g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
        (float) alpha));
    // Draw the image into the prepared reciver image
    g.drawImage(source, null, 0, 0);
    // let go of all system resources in this Graphics
    g.dispose();
    // Return the image
    return target;
  }
}

   
  

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