/*
 * Copyright (c) 2008 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.
 * 
 * - 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
 * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
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 * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
 * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
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 */

package jogamp.opengl.x11.glx;

import javax.media.opengl.*;


public class GLXUtil {
    public static String getExtension(long display) {
        return GLX.glXGetClientString(display, GLX.GLX_EXTENSIONS);
    }

    public static boolean isMultisampleAvailable(String extensions) {
        if (extensions != null) {
            return (extensions.indexOf("GLX_ARB_multisample") >= 0);
        }
        return false;
    }

    public static boolean isMultisampleAvailable(long display) {
        return isMultisampleAvailable(getExtension(display));
    }

    /** Workaround for apparent issue with ATI's proprietary drivers
        where direct contexts still send GLX tokens for GL calls */
    public static String getVendorName(long display) {
        return GLX.glXGetClientString(display, GLX.GLX_VENDOR);
    }

    public static boolean isVendorNVIDIA(String vendor) {
        return vendor != null && vendor.startsWith("NVIDIA") ;
    }

    public static boolean isVendorATI(String vendor) {
        return vendor != null && vendor.startsWith("ATI") ;
    }

    public static boolean isVendorATI(long display) {
        return isVendorATI(getVendorName(display));
    }

    public static boolean isVendorNVIDIA(long display) {
        return isVendorNVIDIA(getVendorName(display));
    }

    public static void getGLXVersion(long display, int major[], int minor[]) { 
        if(0 == display) {
            throw new GLException("null display handle");
        }
        if(major.length<1||minor.length<1) {
            throw new GLException("passed int arrays size is not >= 1");
        }

        if (!GLX.glXQueryVersion(display, major, 0, minor, 0)) {
          throw new GLException("glXQueryVersion failed");
        }

        // Work around bugs in ATI's Linux drivers where they report they
        // only implement GLX version 1.2 on the server side
        if (major[0] == 1 && minor[0] == 2) {
          String str = GLX.glXGetClientString(display, GLX.GLX_VERSION);
          try {
              // e.g. "1.3"
              major[0] = Integer.valueOf(str.substring(0, 1)).intValue();
              minor[0] = Integer.valueOf(str.substring(2, 3)).intValue();
          } catch (Exception e) {
              major[0] = 1;
              minor[0] = 2;
          }
        }
    }
}