    -- #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

    --------------------------------------------------------------------------------

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

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