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Headless graphics driver for JavaFX
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/*
 * Copyright (c) 2010, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.glass.ui.monocle;

import com.sun.glass.ui.monocle.input.InputDeviceRegistry;

public abstract class NativePlatform {

    private static InputDeviceRegistry inputDeviceRegistry;
    protected final RunnableProcessor runnableProcessor;
    private NativeCursor cursor;
    private NativeScreen screen;
    protected AcceleratedScreen accScreen;

    protected NativePlatform() {
        runnableProcessor = new RunnableProcessor();
    }

    protected void shutdown() {
        runnableProcessor.shutdown();
        if (cursor != null) {
            cursor.shutdown();
        }
        if (screen != null) {
            screen.shutdown();
        }
    }

    public RunnableProcessor getRunnableProcessor() {
        return runnableProcessor;
    }

    public synchronized InputDeviceRegistry getInputDeviceRegistry() {
        if (inputDeviceRegistry == null) {
            inputDeviceRegistry = createInputDeviceRegistry();
        }
        return inputDeviceRegistry;
    }

    protected abstract InputDeviceRegistry createInputDeviceRegistry();

    protected abstract NativeCursor createCursor();

    public synchronized NativeCursor getCursor() {
        if (cursor == null) {
            cursor = createCursor();
        }
        return cursor;
    }

    protected abstract NativeScreen createScreen();

    public synchronized NativeScreen getScreen() {
        if (screen == null) {
            screen = createScreen();
        }
        return screen;
    }

    public synchronized AcceleratedScreen getAcceleratedScreen(int[] attributes)
            throws GLException, UnsatisfiedLinkError {
        if (accScreen == null) {
            accScreen = new AcceleratedScreen(attributes);
        }
        return accScreen;
    }

}