--
--  (c) Copyright 1993,1994,1995,1996 Silicon Graphics, Inc.
--  ALL RIGHTS RESERVED
--  Permission to use, copy, modify, and distribute this software for
--  any purpose and without fee is hereby granted, provided that the above
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--  and this permission notice appear in supporting documentation, and that
--  the name of Silicon Graphics, Inc. not be used in advertising
--  or publicity pertaining to distribution of the software without specific,
--  written prior permission.
--
--  THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
--  AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
--  INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
--  FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
--  GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
--  SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
--  KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
--  LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
--  THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
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--  ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
--  POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
--
--  US Government Users Restricted Rights
--  Use, duplication, or disclosure by the Government is subject to
--  restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
--  (c)(1)(ii) of the Rights in Technical Data and Computer Software
--  clause at DFARS 252.227-7013 and/or in similar or successor
--  clauses in the FAR or the DOD or NASA FAR Supplement.
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--
--  OpenGL(TM) is a trademark of Silicon Graphics, Inc.
--

with GL; use GL;
with Glut; use Glut;
with Fog_Procs; use Fog_Procs;
with Interfaces.C.Strings;

procedure Fog is
   package ICS renames Interfaces.C.Strings;

   type chars_ptr_ptr is access ICS.chars_ptr;

   argc : aliased integer;
   pragma Import (C, argc, "gnat_argc");

   argv : chars_ptr_ptr;
   pragma Import (C, argv, "gnat_argv");

   winRet : Integer;
begin
   glutInitWindowSize(450, 150);
   glutInit (argc'access, argv);
   glutInitDisplayMode(GLUT_RGB or GLUT_DEPTH or GLUT_SINGLE);
   winRet := glutCreateWindow ("OpenGL and Ada: fog");
   glutMouseFunc (CycleFog'ACCESS);

   Initialize;

   glutReshapeFunc (HandleReshape'ACCESS);
   glutDisplayFunc (Display'ACCESS);
   glutMainLoop;
end Fog;
