Converts a rendered image to a BufferedImage . - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Convert

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Description

Converts a rendered image to a BufferedImage .

Demo Code

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//package com.java2s;

import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.RenderedImage;
import java.awt.image.WritableRaster;
import java.util.Hashtable;

public class Main {
    /**
     * Converts a rendered image to a {@code BufferedImage}.  This utility
     * method has come from a forum post by Jim Moore at:
     * <p>
     * <a href="http://www.jguru.com/faq/view.jsp?EID=114602">
     * http://www.jguru.com/faq/view.jsp?EID=114602</a>
     * 
     * @param img  the rendered image.
     * 
     * @return A buffered image. 
     */
    public static BufferedImage convertRenderedImage(RenderedImage img) {
        if (img instanceof BufferedImage) {
            return (BufferedImage) img;
        }
        ColorModel cm = img.getColorModel();
        int width = img.getWidth();
        int height = img.getHeight();
        WritableRaster raster = cm.createCompatibleWritableRaster(width,
                height);
        boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
        Hashtable properties = new Hashtable();
        String[] keys = img.getPropertyNames();
        if (keys != null) {
            for (int i = 0; i < keys.length; i++) {
                properties.put(keys[i], img.getProperty(keys[i]));
            }
        }
        BufferedImage result = new BufferedImage(cm, raster,
                isAlphaPremultiplied, properties);
        img.copyData(raster);
        return result;
    }
}

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