    {-# LANGUAGE ForeignFunctionInterface, CPP #-}
    --------------------------------------------------------------------------------
    -- |
    -- Module      :  Graphics.Rendering.OpenGL.Raw.EXT.Multisample
    -- Copyright   :  (c) Sven Panne 2009
    -- License     :  BSD-style (see the file LICENSE)
    --
    -- Maintainer  :  sven.panne@aedion.de
    -- Stability   :  stable
    -- Portability :  portable
    --
    -- All raw functions and tokens from the EXT_multisample extension, see
    -- <http://www.opengl.org/registry/specs/EXT/multisample.txt>.
    --
    --------------------------------------------------------------------------------

    module Graphics.Rendering.OpenGL.Raw.EXT.Multisample (
       -- * Functions
       glSampleMask,
       glSamplePattern,
       -- * Tokens
       gl_MULTISAMPLE,
       gl_SAMPLE_ALPHA_TO_MASK,
       gl_SAMPLE_ALPHA_TO_ONE,
       gl_SAMPLE_MASK_EXT,
       gl_MULTISAMPLE_BIT,
       gl_1PASS,
       gl_2PASS_0,
       gl_2PASS_1,
       gl_4PASS_0,
       gl_4PASS_1,
       gl_4PASS_2,
       gl_4PASS_3,
       gl_SAMPLE_BUFFERS,
       gl_SAMPLES,
       gl_SAMPLE_MASK_VALUE_EXT,
       gl_SAMPLE_MASK_INVERT,
       gl_SAMPLE_PATTERN
    ) where

    import Graphics.Rendering.OpenGL.Raw.ARB.Compatibility
    import Graphics.Rendering.OpenGL.Raw.Core32
    import Graphics.Rendering.OpenGL.Raw.Extensions

    #include "HsOpenGLRaw.h"

    extensionNameString :: String
    extensionNameString = "GL_EXT_multisample"

    EXTENSION_ENTRY(glSampleMask,GLclampf -> GLboolean -> IO ())
    EXTENSION_ENTRY(glSamplePattern,GLenum -> IO ())

    gl_SAMPLE_ALPHA_TO_MASK :: GLenum
    gl_SAMPLE_ALPHA_TO_MASK = 0x809E

    -- | Note: We use the EXT suffix here, because the name clashes with the ARB_texture_multisample extension.
    gl_SAMPLE_MASK_EXT :: GLenum
    gl_SAMPLE_MASK_EXT = 0x80A0

    gl_1PASS :: GLenum
    gl_1PASS = 0x80A1

    gl_2PASS_0 :: GLenum
    gl_2PASS_0 = 0x80A2

    gl_2PASS_1 :: GLenum
    gl_2PASS_1 = 0x80A3

    gl_4PASS_0 :: GLenum
    gl_4PASS_0 = 0x80A4

    gl_4PASS_1 :: GLenum
    gl_4PASS_1 = 0x80A5

    gl_4PASS_2 :: GLenum
    gl_4PASS_2 = 0x80A6

    gl_4PASS_3 :: GLenum
    gl_4PASS_3 = 0x80A7

    -- | Note: We use the EXT suffix here, because the name clashes with the ARB_texture_multisample extension.
    gl_SAMPLE_MASK_VALUE_EXT :: GLenum
    gl_SAMPLE_MASK_VALUE_EXT = 0x80AA

    gl_SAMPLE_MASK_INVERT :: GLenum
    gl_SAMPLE_MASK_INVERT = 0x80AB

    gl_SAMPLE_PATTERN :: GLenum
    gl_SAMPLE_PATTERN = 0x80AC