GLboolean.hs

-- #hide
--------------------------------------------------------------------------------
-- |
-- Module      :  Graphics.Rendering.OpenGL.GL.GLboolean
-- Copyright   :  (c) Sven Panne 2002-2009
-- License     :  BSD-style (see the file libraries/OpenGL/LICENSE)
-- 
-- Maintainer  :  sven.panne@aedion.de
-- Stability   :  stable
-- Portability :  portable
--
-- This is a purely internal module for (un-)marshaling GLboolean.
--
--------------------------------------------------------------------------------

module Graphics.Rendering.OpenGL.GL.GLboolean (
   marshalGLboolean, unmarshalGLboolean
) where

import Graphics.Rendering.OpenGL.Raw.Core31

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marshalGLboolean :: Num a => Bool -> a
marshalGLboolean x = fromIntegral $ case x of
   False -> gl_FALSE
   True -> gl_TRUE

unmarshalGLboolean :: Num a => a -> Bool
unmarshalGLboolean = (/= fromIntegral gl_FALSE)