Java BufferedImage to Transparent getTransparentImage(BufferedImage i)

Description

get Transparent Image

License

Open Source License

Declaration

public static BufferedImage getTransparentImage(BufferedImage i) 

Method Source Code

//package com.java2s;
/*/*from   ww w  . ja  v a2 s .co  m*/
 * Copyright (C) 2007, 2008 Quadduc <quadduc@gmail.com>
 * Copyright (C) 2007, 2011 IsmAvatar <IsmAvatar@gmail.com>
 * Copyright (C) 2007 Clam <clamisgood@gmail.com>
 * Copyright (C) 2013, 2014 Robert B. Colton
 *
 * This file is part of LateralGM.
 * LateralGM is free software and comes with ABSOLUTELY NO WARRANTY.
 * See LICENSE for details.
 */

import java.awt.Graphics;

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;

import javax.swing.ImageIcon;

public class Main {
    public static BufferedImage getTransparentImage(BufferedImage i) {
        if (i == null)
            return null;
        final int t = i.getRGB(0, i.getHeight() - 1) & 0x00FFFFFF;
        ImageFilter filter = new RGBImageFilter() {
            @Override
            public int filterRGB(int x, int y, int rgb) {
                if ((rgb & 0x00FFFFFF) == t)
                    return t;
                return rgb;
            }
        };
        ImageProducer ip = new FilteredImageSource(i.getSource(), filter);
        return toBufferedImage(Toolkit.getDefaultToolkit().createImage(ip));
    }

    public static BufferedImage toBufferedImage(Image image) {
        if (image instanceof BufferedImage)
            return (BufferedImage) image;

        // This code ensures that all the pixels in the image are loaded
        image = new ImageIcon(image).getImage();

        BufferedImage bimage = new BufferedImage(image.getWidth(null), image.getHeight(null),
                BufferedImage.TYPE_INT_ARGB);
        Graphics g = bimage.createGraphics();
        g.drawImage(image, 0, 0, null);
        g.dispose();
        return bimage;
    }
}

Related

1. getTransperentImage(BufferedImage origImage, BufferedImage compImg)
2. makeColorTransparent(BufferedImage im, final Color color)
3. makeColorTransparent(BufferedImage im, final Color color)
4. makeColorTransparent(BufferedImage image, Color color)