ImageUtil.java

package arcane.ui.util;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;

/**
 * <p>ImageUtil class.</p>
 *
 * @author Forge
 * @version $Id: $
 */
public class ImageUtil {
    /**
     * <p>getImage.</p>
     *
     * @param stream a {@link java.io.InputStream} object.
     * @return a {@link java.awt.image.BufferedImage} object.
     * @throws java.io.IOException if any.
     */
    static public BufferedImage getImage(InputStream stream) throws IOException {
        Image tempImage = ImageIO.read(stream);
        BufferedImage image = new BufferedImage(tempImage.getWidth(null), tempImage.getHeight(null), BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = image.createGraphics();
        g2.drawImage(tempImage, 0, 0, null);
        g2.dispose();
        return image;
    }

    /**
     * <p>getImage.</p>
     *
     * @param file a {@link java.io.File} object.
     * @return a {@link java.awt.image.BufferedImage} object.
     * @throws java.io.IOException if any.
     */
    static public BufferedImage getImage(File file) throws IOException {
        Image tempImage = ImageIO.read(file);
        BufferedImage image = new BufferedImage(tempImage.getWidth(null), tempImage.getHeight(null), BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = image.createGraphics();
        g2.drawImage(tempImage, 0, 0, null);
        g2.dispose();
        return image;
    }

    /**
     * <p>getBlurredImage.</p>
     *
     * @param image a {@link java.awt.image.BufferedImage} object.
     * @param radius a int.
     * @param intensity a float.
     * @return a {@link java.awt.image.BufferedImage} object.
     */
    static public BufferedImage getBlurredImage(BufferedImage image, int radius, float intensity) {
        float weight = intensity / (radius * radius);
        float[] elements = new float[radius * radius];
        for (int i = 0, n = radius * radius; i < n; i++)
            elements[i] = weight;
        ConvolveOp blurOp = new ConvolveOp(new Kernel(radius, radius, elements));
        return blurOp.filter(image, null);
    }
}