BufferedImageUtils.java

/*
 * *** BEGIN LICENSE BLOCK *****
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 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
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 * for the specific language governing rights and limitations under the
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 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
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 * The Initial Developer of the Original Code is
 * J4Care.
 * Portions created by the Initial Developer are Copyright (C) 2015
 * the Initial Developer. All Rights Reserved.
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 * See @authors listed below
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package org.dcm4che3.image;

import java.awt.*;
import java.awt.color.ColorSpace;
import java.awt.image.*;

/**
 * @author Gunter Zeilinger <gunterze@gmail.com>
 * @since Aug 2015
 */
public class BufferedImageUtils {

    private BufferedImageUtils() {}

    public static BufferedImage convertToIntRGB(BufferedImage bi) {
        ColorModel cm = bi.getColorModel();
        if (cm instanceof DirectColorModel)
            return bi;

        if (cm.getNumComponents() != 3)
            throw new IllegalArgumentException("ColorModel: " + cm);

        WritableRaster raster = bi.getRaster();
        if (cm instanceof PaletteColorModel)
            return ((PaletteColorModel) cm).convertToIntDiscrete(raster);

        BufferedImage intRGB = new BufferedImage(bi.getWidth(), bi.getHeight(), BufferedImage.TYPE_INT_RGB);
        Graphics graphics = intRGB.getGraphics();
        try {
            graphics.drawImage(bi, 0, 0, null);
        } finally {
            graphics.dispose();
        }
        return intRGB;
    }

}