/*

 * 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 8007146

 * @summary [macosx] Setting a display mode crashes JDK under VNC

 * @author Alexander Scherbatiy

 * @run main CheckDisplayModes

 */

import java.awt.DisplayMode;

import java.awt.GraphicsDevice;

import java.awt.GraphicsEnvironment;

public class CheckDisplayModes {

    public static void main(String[] args) {

        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();

        GraphicsDevice graphicDevice = ge.getDefaultScreenDevice();

        if (!graphicDevice.isDisplayChangeSupported()) {

            System.err.println("Display mode change is not supported on this host. Test is considered passed.");

            return;

        }

        DisplayMode defaultDisplayMode = graphicDevice.getDisplayMode();

        checkDisplayMode(defaultDisplayMode);

        graphicDevice.setDisplayMode(defaultDisplayMode);

        DisplayMode[] displayModes = graphicDevice.getDisplayModes();

        boolean isDefaultDisplayModeIncluded = false;

        for (DisplayMode displayMode : displayModes) {

            checkDisplayMode(displayMode);

            graphicDevice.setDisplayMode(displayMode);

            if (defaultDisplayMode.equals(displayMode)) {

                isDefaultDisplayModeIncluded = true;

            }

        }

        if (!isDefaultDisplayModeIncluded) {

            throw new RuntimeException("Default display mode is not included");

        }

    }

    static void checkDisplayMode(DisplayMode displayMode) {

        if (displayMode == null || displayMode.getWidth() <= 1 || displayMode.getHeight() <= 1) {

            throw new RuntimeException("invalid display mode");

        }

    }

}