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/* -----------------------------------------------------------------------------
*
* Module : GL extension support for Graphics.Rendering.OpenGL
* Copyright : (c) Sven Panne 2002-2004
* License : BSD-style (see the file libraries/OpenGL/LICENSE)
*
* Maintainer : sven.panne@aedion.de
* Stability : provisional
* Portability : portable
*
* This header should only define preprocessor macros!
*
* -------------------------------------------------------------------------- */
#ifndef HSOPENGLEXT_H
#define HSOPENGLEXT_H
/* NOTE: The macro must immediately start with the foreign declaration,
otherwise the magic mangler (hack_foreign) in the Hugs build system
doesn't recognize it. */
#define EXTENSION_ENTRY(_msg,_entry,_ty) \
foreign import CALLCONV unsafe "dynamic" dyn_/**/_entry :: Graphics.Rendering.OpenGL.GL.Extensions.Invoker (_ty) ; \
_entry :: (_ty) ; \
_entry = dyn_##_entry ptr_##_entry ; \
ptr_/**/_entry :: FunPtr a ; \
ptr_/**/_entry = unsafePerformIO (Graphics.Rendering.OpenGL.GL.Extensions.getProcAddress (_msg) ("_entry")) ; \
{-# NOINLINE ptr_/**/_entry #-}
#endif
EXTENSION_ENTRY("GL_EXT_fog_coord or OpenGL 1.4",glFogCoorddEXT,GLdouble -> IO ())
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