test/jdk/java/awt/image/Headless/HeadlessColorModel.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 */

import java.awt.image.*;

/*
 * @test
 * @summary Check that ColorModel methods do not throw
 *          unexpected exceptions in headless mode
 * @run main/othervm -Djava.awt.headless=true HeadlessColorModel
 */

public class HeadlessColorModel {
    public static void main(String args[]) {
        ColorModel cm = new ColorModel(32) {
            public int getAlpha(int pixel) { return 255; }
            public int getBlue(int pixel) { return 255; }
            public int getGreen(int pixel) { return 255; }
            public int getRed(int pixel) { return 255; }
        };

        cm.hasAlpha();
        cm.isAlphaPremultiplied();
        cm.getTransferType();
        cm.getPixelSize();
        cm.getComponentSize();
        cm.getComponentSize();
        cm.getTransparency();
        cm.getNumComponents();
        cm.getNumColorComponents();
        cm.getRed(20);
        cm.getGreen(20);
        cm.getBlue(20);
        cm.getAlpha(20);
        cm.getRGB(20);
        cm.isAlphaPremultiplied();
        cm.isAlphaPremultiplied();

        cm = ColorModel.getRGBdefault();
    }
}