Writes a rectangular area of pixels in the destination BufferedImage. - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Pixel

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Description

Writes a rectangular area of pixels in the destination BufferedImage.

Demo Code

/*//  w ww .  j  a  v  a2s. c o  m
 * @(#)EffectUtils.java   1.2 07/12/12
 *
 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
//package com.java2s;

import java.awt.image.BufferedImage;

import java.awt.image.WritableRaster;

public class Main {
    /**
     * <p>
     * Writes a rectangular area of pixels in the destination
     * <code>BufferedImage</code>. Calling this method on an image of type
     * different from <code>BufferedImage.TYPE_INT_ARGB</code> and
     * <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the image.
     * </p>
     * 
     * @param img
     *            the destination image
     * @param x
     *            the x location at which to start storing pixels
     * @param y
     *            the y location at which to start storing pixels
     * @param w
     *            the width of the rectangle of pixels to store
     * @param h
     *            the height of the rectangle of pixels to store
     * @param pixels
     *            an array of pixels, stored as integers
     * @throws IllegalArgumentException
     *             is <code>pixels</code> is non-null and of length &lt; w*h
     */
    static void setPixels(BufferedImage img, int x, int y, int w, int h,
            byte[] pixels) {
        if (pixels == null || w == 0 || h == 0) {
            return;
        } else if (pixels.length < w * h) {
            throw new IllegalArgumentException(
                    "pixels array must have a length >= w*h");
        }
        int imageType = img.getType();
        if (imageType == BufferedImage.TYPE_BYTE_GRAY) {
            WritableRaster raster = img.getRaster();
            raster.setDataElements(x, y, w, h, pixels);
        } else {
            throw new IllegalArgumentException(
                    "Only type BYTE_GRAY is supported");
        }
    }

    /**
     * <p>
     * Writes a rectangular area of pixels in the destination
     * <code>BufferedImage</code>. Calling this method on an image of type
     * different from <code>BufferedImage.TYPE_INT_ARGB</code> and
     * <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the image.
     * </p>
     * 
     * @param img
     *            the destination image
     * @param x
     *            the x location at which to start storing pixels
     * @param y
     *            the y location at which to start storing pixels
     * @param w
     *            the width of the rectangle of pixels to store
     * @param h
     *            the height of the rectangle of pixels to store
     * @param pixels
     *            an array of pixels, stored as integers
     * @throws IllegalArgumentException
     *             is <code>pixels</code> is non-null and of length &lt; w*h
     */
    public static void setPixels(BufferedImage img, int x, int y, int w,
            int h, int[] pixels) {
        if (pixels == null || w == 0 || h == 0) {
            return;
        } else if (pixels.length < w * h) {
            throw new IllegalArgumentException(
                    "pixels array must have a length" + " >= w*h");
        }

        int imageType = img.getType();
        if (imageType == BufferedImage.TYPE_INT_ARGB
                || imageType == BufferedImage.TYPE_INT_RGB) {
            WritableRaster raster = img.getRaster();
            raster.setDataElements(x, y, w, h, pixels);
        } else {
            // Unmanages the image
            img.setRGB(x, y, w, h, pixels, 0, w);
        }
    }
}

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