Java BufferedImage Clip subimage(BufferedImage src, int x, int y, int w, int h)

Description

Returns a subimage of the given main image.

License

LGPL

Parameter

Parameter	Description
src	the source image.
x	the x coordinate
y	the y coordinate
w	the width
h	the height

Return

the extracted sub-image

Declaration

@SuppressWarnings("unused")
public static BufferedImage subimage(BufferedImage src, int x, int y, int w, int h) 

Method Source Code

//package com.java2s;
/*/*  w  w  w  .j a  v  a  2  s.com*/
 * Copyright 2008-2011, David Karnok 
 * The file is part of the Open Imperium Galactica project.
 * 
 * The code should be distributed under the LGPL license.
 * See http://www.gnu.org/licenses/lgpl.html for details.
 */

import java.awt.image.BufferedImage;

public class Main {
    /** Use subimage or separate image. */
    private static final boolean SUBIMAGE = false;

    /**
     * Returns a subimage of the given main image. If the sub-image tends to be
     * smaller in area then the original image, a new buffered image is returned
     * instead of the shared sub image
     * 
     * @param src
     *            the source image.
     * @param x
     *            the x coordinate
     * @param y
     *            the y coordinate
     * @param w
     *            the width
     * @param h
     *            the height
     * @return the extracted sub-image
     */
    @SuppressWarnings("unused")
    public static BufferedImage subimage(BufferedImage src, int x, int y, int w, int h) {
        if (!SUBIMAGE /* && w * h * 16 < src.getWidth() * src.getHeight() */) {
            return newSubimage(src, x, y, w, h);
        }
        return src.getSubimage(x, y, w, h);
    }

    /**
     * Returns an independent subimage of the given main image. copying data
     * from the original image.
     * 
     * @param src
     *            the source image.
     * @param x
     *            the x coordinate
     * @param y
     *            the y coordinate
     * @param w
     *            the width
     * @param h
     *            the height
     * @return the extracted sub-image
     */
    public static BufferedImage newSubimage(BufferedImage src, int x, int y, int w, int h) {
        BufferedImage bimg = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
        int[] tmp = new int[w * h];
        src.getRGB(x, y, w, h, tmp, 0, w);
        bimg.setRGB(0, 0, w, h, tmp, 0, w);
        return bimg;
    }
}

Related

1. clip(BufferedImage image, int[] ul, int[] lr)
2. subImage(BufferedImage image, int x, int y, int width, int height)