make Image Color Transparent - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Color

  1. HOME
  2. Java
  3. 2D Graphics
  4. BufferedImage Color

Description

make Image Color Transparent

Demo Code


//package com.java2s;
import java.awt.Color;

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.awt.image.ImageProducer;

import java.awt.image.RGBImageFilter;

public class Main {
    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;

            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;
                }//from w w w.  j  ava 2s. com
            }
        };

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

Related Tutorials