/*
 * %W% %E%
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
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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, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
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 * You acknowledge that this software is not designed, licensed or intended
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 */

/*
 * %W% %E%
 *
 * Simple application to test if OGL rendering pipline is available.
 *
 * @author  Rick Reynaga
 */

import java.awt.*;
import java.awt.image.*;
import java.lang.reflect.*;

public class TestOGLConfiguration {

    private static boolean isOGLAvailable() {
        boolean oglStatus = false;

        // Get default GraphicsConfiguration
        GraphicsEnvironment ge =
            GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsConfiguration gc =
            ge.getDefaultScreenDevice().getDefaultConfiguration();
        String gcString = gc.toString();

        // Get os.name attribute
        String osName = System.getProperty("os.name");

        // Check if using OGL GraphicsConfiguration
        if (osName.startsWith("Windows")) {
            if (gcString.startsWith("WGLGraphicsConfig")) {
                oglStatus = true;
            }
        } else if (osName.startsWith("Linux") || osName.startsWith("SunOS")) {
            if (gcString.startsWith("GLXGraphicsConfig")) {
                oglStatus = true;
            }
        }

        return oglStatus;
    }

    private static boolean isFBOAvailable() {
        // Get default GraphicsConfiguration
        GraphicsEnvironment ge =
            GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsConfiguration gc =
            ge.getDefaultScreenDevice().getDefaultConfiguration();

        // Use reflection to see if the FBO codepath is in use
        try {
            Class oglgcKlass =
                Class.forName("sun.java2d.opengl.OGLGraphicsConfig");
            Method m = oglgcKlass.getDeclaredMethod("isCapPresent",
                                                    int.class);
            m.setAccessible(true);
            Class oglcKlass = Class.forName("sun.java2d.opengl.OGLContext");
            Field f = oglcKlass.getDeclaredField("CAPS_EXT_FBOBJECT");
            f.setAccessible(true);
            Boolean fbo = (Boolean)m.invoke(gc, f.get(null));
            return fbo.booleanValue();
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    public static void main(String[] args) {
        boolean checkfbo = (args.length == 1 && "-checkfbo".equals(args[0]));

        // Enable OGL pipeline
        if (checkfbo) {
            System.setProperty("sun.java2d.opengl", "true");
            System.setProperty("sun.java2d.opengl.fbobject", "true");
        } else {
            System.setProperty("sun.java2d.opengl", "True");
        }

        // Require JDK 6 and above
        String javaVersion = System.getProperty("java.version");
        int major = javaVersion.charAt(0);
        int minor = javaVersion.charAt(2);
        if (major == 1 && minor < 6) {
            System.out.println("TestOGLConfiguration: " +
                               "Test suite requires JDK 6 or above");
            System.exit(1);
        }

        if (isOGLAvailable()) {
            if (checkfbo) {
                if (isFBOAvailable()) {
                    System.out.println("TestOGLConfiguration: " +
                                       "FBO codepath supported");
                    System.exit(0);
                } else {
                    System.out.println("TestOGLConfiguration: " +
                                       "FBO codepath not supported");
                    System.exit(1);
                }
            } else {
                System.out.println("TestOGLConfiguration: " +
                                   "OpenGL supported configuration");
                System.exit(0);
            }
        } else {
            System.out.println("TestOGLConfiguration: " +
                               "OpenGL pipeline not supported "+
                               "on this configuration");
            System.exit(1);
        }
    }
}