Image has Alpha - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Color

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Description

Image has Alpha

Demo Code


//package com.java2s;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.awt.image.ColorModel;
import java.awt.image.PixelGrabber;

public class Main {
    public static boolean hasAlpha(Image image) {
        // If buffered image, the color model is readily available
        if (image instanceof BufferedImage) {
            BufferedImage bimage = (BufferedImage) image;
            return bimage.getColorModel().hasAlpha();
        }/*  ww w.  ja  v a  2  s  .  com*/

        // Use a pixel grabber to retrieve the image's color model;
        // grabbing a single pixel is usually sufficient
        PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
        try {
            pg.grabPixels();
        } catch (InterruptedException e) {
        }

        // Get the image's color model
        ColorModel cm = pg.getColorModel();
        return cm.hasAlpha();
    }
}

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