/*

 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

 * 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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

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 */

package java.awt;

import java.lang.annotation.Native;

/**

 * The <code>DisplayMode</code> class encapsulates the bit depth, height,

 * width, and refresh rate of a <code>GraphicsDevice</code>. The ability to

 * change graphics device's display mode is platform- and

 * configuration-dependent and may not always be available

 * (see {@link GraphicsDevice#isDisplayChangeSupported}).

 * <p>

 * For more information on full-screen exclusive mode API, see the

 * <a href="http://docs.oracle.com/javase/tutorial/extra/fullscreen/index.html">

 * Full-Screen Exclusive Mode API Tutorial</a>.

 *

 * @see GraphicsDevice

 * @see GraphicsDevice#isDisplayChangeSupported

 * @see GraphicsDevice#getDisplayModes

 * @see GraphicsDevice#setDisplayMode

 * @author Michael Martak

 * @since 1.4

 */

public final class DisplayMode {

    private Dimension size;

    private int bitDepth;

    private int refreshRate;

    /**

     * Create a new display mode object with the supplied parameters.

     * @param width the width of the display, in pixels

     * @param height the height of the display, in pixels

     * @param bitDepth the bit depth of the display, in bits per

     *        pixel.  This can be <code>BIT_DEPTH_MULTI</code> if multiple

     *        bit depths are available.

     * @param refreshRate the refresh rate of the display, in hertz.

     *        This can be <code>REFRESH_RATE_UNKNOWN</code> if the

     *        information is not available.

     * @see #BIT_DEPTH_MULTI

     * @see #REFRESH_RATE_UNKNOWN

     */

    public DisplayMode(int width, int height, int bitDepth, int refreshRate) {

        this.size = new Dimension(width, height);

        this.bitDepth = bitDepth;

        this.refreshRate = refreshRate;

    }

    /**

     * Returns the height of the display, in pixels.

     * @return the height of the display, in pixels

     */

    public int getHeight() {

        return size.height;

    }

    /**

     * Returns the width of the display, in pixels.

     * @return the width of the display, in pixels

     */

    public int getWidth() {

        return size.width;

    }

    /**

     * Value of the bit depth if multiple bit depths are supported in this

     * display mode.

     * @see #getBitDepth

     */

    @Native public final static int BIT_DEPTH_MULTI = -1;

    /**

     * Returns the bit depth of the display, in bits per pixel.  This may be

     * <code>BIT_DEPTH_MULTI</code> if multiple bit depths are supported in

     * this display mode.

     *

     * @return the bit depth of the display, in bits per pixel.

     * @see #BIT_DEPTH_MULTI

     */

    public int getBitDepth() {

        return bitDepth;

    }

    /**

     * Value of the refresh rate if not known.

     * @see #getRefreshRate

     */

    @Native public final static int REFRESH_RATE_UNKNOWN = 0;

    /**

     * Returns the refresh rate of the display, in hertz.  This may be

     * <code>REFRESH_RATE_UNKNOWN</code> if the information is not available.

     *

     * @return the refresh rate of the display, in hertz.

     * @see #REFRESH_RATE_UNKNOWN

     */

    public int getRefreshRate() {

        return refreshRate;

    }

    /**

     * Returns whether the two display modes are equal.

     *

     * @param  dm the display mode to compare to

     * @return whether the two display modes are equal

     */

    public boolean equals(DisplayMode dm) {

        if (dm == null) {

            return false;

        }

        return (getHeight() == dm.getHeight()

            && getWidth() == dm.getWidth()

            && getBitDepth() == dm.getBitDepth()

            && getRefreshRate() == dm.getRefreshRate());

    }

    /**

     * {@inheritDoc}

     */

    public boolean equals(Object dm) {

        if (dm instanceof DisplayMode) {

            return equals((DisplayMode)dm);

        } else {

            return false;

        }

    }

    /**

     * {@inheritDoc}

     */

    public int hashCode() {

        return getWidth() + getHeight() + getBitDepth() * 7

            + getRefreshRate() * 13;

    }

}