    --------------------------------------------------------------------------------
    -- |
    -- Module      :  Graphics.Rendering.OpenGL.GL.Antialiasing
    -- Copyright   :  (c) Sven Panne 2002-2006
    -- License     :  BSD-style (see the file libraries/OpenGL/LICENSE)
    --
    -- Maintainer  :  sven.panne@aedion.de
    -- Stability   :  stable
    -- Portability :  portable
    --
    -- This module corresponds to section 3.2 (Antialiasing) of the OpenGL 2.1
    -- specs.
    --
    --------------------------------------------------------------------------------

    module Graphics.Rendering.OpenGL.GL.Antialiasing (
       sampleBuffers, samples, multisample, subpixelBits
    ) where

    import Graphics.Rendering.OpenGL.GL.Capability (
       EnableCap(CapMultisample), makeCapability )
    import Graphics.Rendering.OpenGL.GL.BasicTypes ( GLsizei, Capability )
    import Graphics.Rendering.OpenGL.GL.QueryUtils (
       GetPName(GetSampleBuffers,GetSamples,GetSubpixelBits), getSizei1 )
    import Graphics.Rendering.OpenGL.GL.StateVar (
       GettableStateVar, makeGettableStateVar, StateVar )

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

    sampleBuffers :: GettableStateVar GLsizei
    sampleBuffers = antialiasingInfo GetSampleBuffers

    samples :: GettableStateVar GLsizei
    samples = antialiasingInfo GetSamples

    multisample :: StateVar Capability
    multisample = makeCapability CapMultisample

    subpixelBits :: GettableStateVar GLsizei
    subpixelBits = antialiasingInfo GetSubpixelBits

    antialiasingInfo :: GetPName -> GettableStateVar GLsizei
    antialiasingInfo = makeGettableStateVar . getSizei1 id