/*
 * Copyright (c) 2010-2024 JogAmp Community. All rights reserved.
 * Copyright (c) 2008-2009 Sun Microsystems, Inc. All Rights Reserved.
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 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
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 */

package com.jogamp.nativewindow.x11;

import jogamp.nativewindow.x11.X11Lib;
import jogamp.nativewindow.x11.X11Util;

import com.jogamp.nativewindow.DefaultGraphicsDevice;
import com.jogamp.nativewindow.NativeWindowException;
import com.jogamp.nativewindow.NativeWindowFactory;
import com.jogamp.nativewindow.ToolkitLock;

/** Encapsulates a graphics device on X11 platforms.
 */

public class X11GraphicsDevice extends DefaultGraphicsDevice implements Cloneable {
    final boolean isXineramaEnabled;

    /** Constructs a new X11GraphicsDevice corresponding to the given connection and default
     *  {@link com.jogamp.nativewindow.ToolkitLock} via {@link NativeWindowFactory#getDefaultToolkitLock(String)}.<br>
     *  Note that this is not an open connection, ie no native display handle exist.
     *  This constructor exist to setup a default device connection.
     *  @see DefaultGraphicsDevice#DefaultGraphicsDevice(String, String, int)
     */
    public X11GraphicsDevice(final String connection, final int unitID) {
        super(NativeWindowFactory.TYPE_X11, connection, unitID);
        setHandleOwnership(false);
        isXineramaEnabled = false;
    }

    /** Constructs a new X11GraphicsDevice corresponding to the given native display handle and default
     *  {@link com.jogamp.nativewindow.ToolkitLock} via {@link NativeWindowFactory#getDefaultToolkitLock(String)}.
     *  @see DefaultGraphicsDevice#DefaultGraphicsDevice(String, String, int, long)
     */
    public X11GraphicsDevice(final long display, final int unitID, final boolean owner) {
        this(display, unitID, NativeWindowFactory.getDefaultToolkitLock(NativeWindowFactory.TYPE_X11), owner);
    }

    /**
     * @param display the Display connection
     * @param locker custom {@link com.jogamp.nativewindow.ToolkitLock}, eg to force null locking w/ private connection
     * @see DefaultGraphicsDevice#DefaultGraphicsDevice(String, String, int, long, ToolkitLock)
     */
    public X11GraphicsDevice(final long display, final int unitID, final ToolkitLock locker, final boolean owner) {
        super(NativeWindowFactory.TYPE_X11, X11Lib.XDisplayString(display), unitID, display, locker);
        if(0==display) {
            throw new NativeWindowException("null display");
        }
        setHandleOwnership(owner);
        isXineramaEnabled = X11Util.XineramaIsEnabled(this);
    }

    /**
     * Constructs a new X11GraphicsDevice corresponding to the given display connection.
     * <p>
     * The constructor opens the native connection and takes ownership.
     * </p>
     * @param displayConnection the semantic display connection name
     * @param locker custom {@link com.jogamp.nativewindow.ToolkitLock}, eg to force null locking w/ private connection
     * @see DefaultGraphicsDevice#DefaultGraphicsDevice(String, String, int, long, ToolkitLock)
     */
    public X11GraphicsDevice(final String displayConnection, final int unitID, final ToolkitLock locker) {
        super(NativeWindowFactory.TYPE_X11, displayConnection, unitID, 0, locker);
        setHandleOwnership(true);
        open();
        isXineramaEnabled = X11Util.XineramaIsEnabled(this);
    }

    private static int getDefaultScreenImpl(final long dpy) {
        return X11Lib.DefaultScreen(dpy);
    }

    /**
     * Returns the default screen number as referenced by the display connection, i.e. 'somewhere:0.1' -> 1
     * <p>
     * Implementation uses the XLib macro <code>DefaultScreen(display)</code>.
     * </p>
     */
    public int getDefaultScreen() {
        final long display = getHandle();
        if(0==display) {
            throw new NativeWindowException("null display");
        }
        final int ds = getDefaultScreenImpl(display);
        if(DEBUG) {
            System.err.println(Thread.currentThread().getName() + " - X11GraphicsDevice.getDefaultDisplay() of "+this+": "+ds+", count "+X11Lib.ScreenCount(display));
        }
        return ds;
    }

    public int getDefaultVisualID() {
        final long display = getHandle();
        if(0==display) {
            throw new NativeWindowException("null display");
        }
        return X11Lib.DefaultVisualID(display, getDefaultScreenImpl(display));
    }

    public final boolean isXineramaEnabled() {
        return isXineramaEnabled;
    }

    @Override
    public Object clone() {
      return super.clone();
    }

    @Override
    public boolean open() {
        if(isHandleOwner() && 0 == handle) {
            if(DEBUG) {
                System.err.println(Thread.currentThread().getName() + " - X11GraphicsDevice.open(): "+this);
            }
            handle = X11Util.openDisplay(connection);
            if(0 == handle) {
                throw new NativeWindowException("X11GraphicsDevice.open() failed: "+this);
            }
            return true;
        }
        return false;
    }

    @Override
    public boolean close() {
        if(isHandleOwner() && 0 != handle) {
            if(DEBUG) {
                System.err.println(Thread.currentThread().getName() + " - X11GraphicsDevice.close(): "+this);
            }
            X11Util.closeDisplay(handle);
        }
        return super.close();
    }

    private boolean setHandleOwnership(final boolean v) {
        final Boolean o = (Boolean)getHandleOwnership();
        super.setHandleOwnership(v ? Boolean.valueOf(true) : null);
        return null != o ? o.booleanValue() : false;
    }
}
