Java BufferedImage Transparent applyTransparency(BufferedImage src, float alpha)

Description

apply Transparency

License

Open Source License

Declaration

public static BufferedImage applyTransparency(BufferedImage src, float alpha) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.awt.AlphaComposite;
import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

public class Main {
    public static BufferedImage applyTransparency(BufferedImage src, float alpha) {

        BufferedImage dest = new BufferedImage(src.getWidth(), src.getHeight(), BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = dest.createGraphics();

        g.drawImage(src, 0, 0, null);//  w ww .j av  a 2  s  .  co m

        AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.DST_IN, 1.0f);
        g.setComposite(ac);

        float a = Math.max(0, Math.min(1, alpha));
        g.setColor(new Color(0f, 0f, 0f, a));
        g.fillRect(0, 0, dest.getWidth(), dest.getHeight());

        g.dispose();

        return dest;
    }
}

Related

1. ApplyTransparency(BufferedImage image, Image mask)
2. bordersNonTransparentPixel(BufferedImage data, int wid, int hei, boolean[] traced, int x, int y)
3. ConvToTransparentImage(BufferedImage src, float alpha)
4. cutTransparentBorder(BufferedImage src)
5. fixTransparency(String var0, BufferedImage var1)