GLScene/Source/GLS.OpenGLx.pas

//
// This unit is part of the GLScene Engine, http://glscene.org
//
unit GLS.OpenGLx;

(* -------------------------------------------------------------
 Copyright 1991-1993, Silicon Graphics, Inc.
 All Rights Reserved.

 This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
 the contents of this file may not be disclosed to third parties, copied or
 duplicated in any form, in whole or in part, without the prior written
 permission of Silicon Graphics, Inc.

 RESTRICTED RIGHTS LEGEND:
 Use, duplication or disclosure by the Government is subject to restrictions
 as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
 and Computer Software clause at DFARS 252.227-7013, and/or in similar or
 successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
 rights reserved under the Copyright Laws of the United States.
 ------------------------------------------------------------- *)

interface

{$I GLScene.inc}

uses
  System.SysUtils,
  System.Math,
  {$IFDEF MSWINDOWS}
     Winapi.Windows,
  {$ENDIF}
  {$IFDEF LINUX} X, XLib, XUtil, {$ENDIF}
  GLVectorTypes;

const
{$IFDEF MSWINDOWS}
  opengl32 = 'OpenGL32.dll';
  glu32 = 'GLU32.dll';
  libEGL = 'libEGL.dll';
  libGLES2 = 'libGLESv2.dll';
{$ENDIF}
{$IFDEF LINUX}
  opengl32 = 'libGL.so';
  glu32 = 'libGLU.so';
  libEGL = 'libEGL.so';
  libGLES2 = 'libGLESv2.so';
{$ENDIF}

type
  TRCOptions = set of (
     opDoubleBuffered,
     opGDI,
     opStereo
  );

  PGLChar     = PAnsiChar;
  TGLString   = AnsiString;


  TGLenum     = Cardinal;
  PGLenum     = ^TGLenum;

  TGLboolean = BYTEBOOL;
  PGLboolean = ^TGLboolean;

  TGLbitfield = UINT;
  PGLbitfield = ^TGLbitfield;

  TGLbyte = ShortInt;
  PGLbyte = ^TGLbyte;

  TGLshort = SmallInt;
  PGLshort = ^TGLshort;

  TGLint = Integer;
  PGLint = ^Integer;

  TGLsizei = Integer;
  PGLsizei = ^TGLsizei;

  TGLint64 = Int64;
  PGLint64 = ^TGLint64;

  TGLint64EXT = Int64;
  PGLint64EXT = ^TGLint64EXT;

  TGLuint64 = UInt64;
  PGLuint64 = ^TGLuint64;

  TGLuint64EXT = UInt64;
  PGLuint64EXT = ^TGLuint64EXT;

  TGLubyte = Byte;
  PGLubyte = System.PByte;

  TGLushort = Word;
  PGLushort = System.PWord;

  TGLuint = UINT;
  PGLuint = ^TGLuint;

  TGLfloat = Single;
  PGLfloat = System.PSingle;

  TGLclampf = Single;
  PGLclampf = ^TGLclampf;

  TGLdouble = Double;
  PGLdouble = System.PDouble;

  TGLclampd = Double;
  PGLclampd = ^TGLclampd;

  TGLhandleARB = Cardinal;
  PGLhandleARB = ^TGLhandleARB;

  PGLPCharArray = ^PGLChar;
  PGLvoid = Pointer;

  TVector4p = array[0..3] of Pointer;
  PGLPointer = ^Pointer;

 // the size of these depend on platform (32bit or 64bit)
  TGLintptr = NativeInt;
  TGLsizeiptr = NativeInt;
  TGLsync = NativeInt;


   {$IFDEF MSWINDOWS}
   PWGLSwap = ^TWGLSwap;
   _WGLSWAP = packed record
     hdc: HDC;
     uiFlags: UINT;
   end;
   TWGLSwap = _WGLSWAP;
   WGLSWAP = _WGLSWAP;
   {$ENDIF}

   // Linux type
   {$IFDEF LINUX}
   GLXContext    = Pointer;
   GLXPixmap     = XID;
   GLXDrawable   = XID;

   GLXFBConfig   = Pointer;
   GLXFBConfigID = XID;
   GLXContextID  = XID;
   GLXWindow     = XID;
   GLXPbuffer    = XID;
   {$ENDIF}

   HPBUFFERARB = Integer;


// ---------------------------- OpenGL Utility (GLU) types --------------------
type
  PHGPUNV = ^HGPUNV;
  HGPUNV = THandle;

   HVIDEOINPUTDEVICENV = THandle;
  PHVIDEOINPUTDEVICENV = ^HVIDEOINPUTDEVICENV;

  PGPUDEVICE = ^TGPUDEVICE;
  TGPUDEVICE = record
    cb: Cardinal;
    DeviceName: array [0 .. 31] of AnsiChar;
    DeviceString: array [0 .. 127] of AnsiChar;
    Flags: Cardinal;
    rcVirtualScreen: TRect;
  end;

  TGLUNurbs = record
  end;
  TGLUQuadric = record
  end;
  TGLUTesselator = record
  end;
  PGLUNurbs = ^TGLUNurbs;
  PGLUQuadric = ^TGLUQuadric;
  PGLUTesselator = ^TGLUTesselator;
  // backwards compatibility
  TGLUNurbsObj = TGLUNurbs;
  TGLUQuadricObj = TGLUQuadric;
  TGLUTesselatorObj = TGLUTesselator;
  TGLUTriangulatorObj = TGLUTesselator;
  PGLUNurbsObj = PGLUNurbs;
  PGLUQuadricObj = PGLUQuadric;
  PGLUTesselatorObj = PGLUTesselator;
  PGLUTriangulatorObj = PGLUTesselator;

  // GLUQuadricCallback
  TGLUQuadricErrorProc = procedure(errorCode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  // GLUTessCallback
  TGLUTessBeginProc = procedure(AType: TGLenum); {$IFDEF MSWINDOWS} stdcall;{$ELSE} cdecl; {$ENDIF}
  TGLUTessEdgeFlagProc = procedure(Flag: TGLboolean);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessVertexProc = procedure(VertexData: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessEndProc = procedure; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessErrorProc = procedure(ErrNo: TGLenum); {$IFDEF MSWINDOWS} stdcall;{$ELSE} cdecl; {$ENDIF}
  TGLUTessCombineProc = procedure(const Coords: TVector3d; const VertexData: TVector4p; const Weight: TVector4f; OutData: PGLPointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessBeginDataProc = procedure(AType: TGLenum; UserData: Pointer);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessEdgeFlagDataProc = procedure(Flag: TGLboolean; UserData: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessVertexDataProc = procedure(VertexData: Pointer; UserData: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessEndDataProc = procedure(UserData: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessErrorDataProc = procedure(ErrNo: TGLenum; UserData: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  TGLUTessCombineDataProc = procedure(const Coords: TVector3d; const VertexData: TVector4p; const Weight: TVector4f; OutData: PGLPointer;   UserData: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
  // GLUNurbsCallback
  TGLUNurbsErrorProc = procedure(errorCode: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

var
  GL_VERSION_1_0,
  GL_VERSION_1_1,
  GL_VERSION_1_2,
  GL_VERSION_1_3,
  GL_VERSION_1_4,
  GL_VERSION_1_5,
  GL_VERSION_2_0,
  GL_VERSION_2_1,
  GL_VERSION_3_0,
  GL_VERSION_3_1,
  GL_VERSION_3_2,
  GL_VERSION_3_3,
  GL_VERSION_4_0,
  GL_VERSION_4_1,
  GL_VERSION_4_2,
  GL_VERSION_4_3,
  GL_VERSION_4_4,
  GL_VERSION_4_5,
  GL_VERSION_4_6,
  GLU_VERSION_1_1,
  GLU_VERSION_1_2,
  GLU_VERSION_1_3,
  GL_3DFX_multisample,
  GL_3DFX_tbuffer,
  GL_3DFX_texture_compression_FXT1,
  GL_APPLE_client_storage,
  GL_APPLE_element_array,
  GL_APPLE_fence,
  GL_APPLE_specular_vector,
  GL_APPLE_transform_hint,
  GL_APPLE_vertex_array_object,
  GL_APPLE_vertex_array_range,
  GL_APPLE_ycbcr_422,
  GL_APPLE_texture_range,
  GL_APPLE_float_pixels,
  GL_APPLE_vertex_program_evaluators,
  GL_APPLE_aux_depth_stencil,
  GL_APPLE_object_purgeable,
  GL_APPLE_row_bytes,
  GL_APPLE_rgb_422,
  GL_ARB_depth_texture,
  GL_ARB_fragment_program,
  GL_ARB_imaging,
  GL_ARB_matrix_palette,
  GL_ARB_multisample,
  GL_ARB_multitexture,
  GL_ARB_point_parameters,
  GL_ARB_shadow,
  GL_ARB_shadow_ambient,
  GL_ARB_texture_border_clamp,
  GL_ARB_texture_compression,
  GL_ARB_texture_cube_map,
  GL_ARB_texture_env_add,
  GL_ARB_texture_env_combine,
  GL_ARB_texture_env_crossbar,
  GL_ARB_texture_env_dot3,
  GL_ARB_texture_filter_minmax,
  GL_ARB_texture_mirrored_repeat,
  GL_ARB_transpose_matrix,
  GL_ARB_vertex_blend,
  GL_ARB_vertex_buffer_object,
  GL_ARB_vertex_program,
  GL_ARB_window_pos,
  GL_ARB_shader_objects,
  GL_ARB_vertex_shader,
  GL_ARB_fragment_shader,
  GL_ARB_fragment_shader_interlock,
  GL_ARB_shading_language_100,
  GL_ARB_occlusion_query,
  GL_ARB_texture_non_power_of_two,
  GL_ARB_point_sprite,
  GL_ARB_fragment_program_shadow,
  GL_ARB_draw_buffers,
  GL_ARB_texture_rectangle,
  GL_ARB_color_buffer_float,
  GL_ARB_half_float_pixel,
  GL_ARB_texture_float,
  GL_ARB_pixel_buffer_object,
  GL_ARB_depth_buffer_float,
  GL_ARB_draw_instanced,
  GL_ARB_framebuffer_object,
  GL_ARB_framebuffer_sRGB,
  GL_ARB_geometry_shader4,
  GL_ARB_half_float_vertex,
  GL_ARB_instanced_arrays,
  GL_ARB_map_buffer_range,
  GL_ARB_texture_buffer_object,
  GL_ARB_texture_compression_rgtc,
  GL_ARB_texture_rg,
  GL_ARB_vertex_array_object,
  GL_ARB_uniform_buffer_object,
  GL_ARB_compatibility,
  GL_ARB_copy_buffer,
  GL_ARB_shader_texture_lod,
  GL_ARB_shader_viewport_layer_array,
  GL_ARB_depth_clamp,
  GL_ARB_draw_elements_base_vertex,
  GL_ARB_fragment_coord_conventions,
  GL_ARB_provoking_vertex,
  GL_ARB_seamless_cube_map,
  GL_ARB_sync,
  GL_ARB_texture_multisample,
  GL_ARB_vertex_array_bgra,
  GL_ARB_draw_buffers_blend,
  GL_ARB_sample_shading,
  GL_ARB_sample_locations,
  GL_ARB_sparse_texture2,
  GL_ARB_sparse_texture_clamp,
  GL_ARB_texture_cube_map_array,
  GL_ARB_texture_gather,
  GL_ARB_texture_query_lod,
  GL_ARB_shading_language_include,
  GL_ARB_texture_compression_bptc,
  GL_ARB_blend_func_extended,
  GL_ARB_explicit_attrib_location,
  GL_ARB_occlusion_query2,
  GL_ARB_parallel_shader_compile,
  GL_ARB_post_depth_coverage,
  GL_ARB_sampler_objects,
  GL_ARB_shader_bit_encoding,
  GL_ARB_shader_clock,
  GL_ARB_texture_rgb10_a2ui,
  GL_ARB_texture_swizzle,
  GL_ARB_timer_query,
  GL_ARB_vertex_type_2_10_10_10_rev,
  GL_ARB_draw_indirect,
  GL_ARB_gpu_shader5,
  GL_ARB_gpu_shader_fp64,
  GL_ARB_gpu_shader_int64,
  GL_ARB_shader_subroutine,
  GL_ARB_tessellation_shader,
  GL_ARB_texture_buffer_object_rgb32,
  GL_ARB_transform_feedback2,
  GL_ARB_transform_feedback3,
  GL_ARB_ES2_compatibility,
  GL_ARB_ES3_2_compatibility,
  GL_ARB_get_program_binary,
  GL_ARB_separate_shader_objects,
  GL_ARB_shader_precision,
  GL_ARB_shader_ballot,
  GL_ARB_vertex_attrib_64bit,
  GL_ARB_viewport_array,

  // GL 4.2
  GL_ARB_base_instance,
  GL_ARB_shading_language_420pack,
  GL_ARB_transform_feedback_instanced,
  GL_ARB_compressed_texture_pixel_storage,
  GL_ARB_conservative_depth,
  GL_ARB_internalformat_query,
  GL_ARB_map_buffer_alignment,
  GL_ARB_shader_atomic_counters,
  GL_ARB_shader_image_load_store,
  GL_ARB_shading_language_packing,
  GL_ARB_texture_storage,


  // GL 4.3
  GL_ARB_arrays_of_arrays,
  GL_ARB_fragment_layer_viewport,
  GL_ARB_shader_image_size,
  GL_ARB_ES3_compatibility,
  GL_ARB_clear_buffer_object,
  GL_ARB_compute_shader,
  GL_ARB_copy_image,
  GL_KHR_debug,
  GL_ARB_explicit_uniform_location,
  GL_ARB_framebuffer_no_attachments,
  GL_ARB_internalformat_query2,
  GL_ARB_invalidate_subdata,
  GL_ARB_multi_draw_indirect,
  GL_ARB_program_interface_query,
  GL_ARB_robust_buffer_access_behavior,
  GL_ARB_shader_storage_buffer_object,
  GL_ARB_stencil_texturing,
  GL_ARB_texture_buffer_range,
  GL_ARB_texture_query_levels,
  GL_ARB_texture_storage_multisample,
  GL_ARB_texture_view,
  GL_ARB_vertex_attrib_binding,
  GL_NV_path_rendering,
  GL_AMD_pinned_memory,
  GL_AMD_stencil_operation_extended,
  GL_AMD_vertex_shader_viewport_index,
  GL_AMD_vertex_shader_layer,
  GL_NV_bindless_texture,
  GL_NV_shader_atomic_float,
  GL_AMD_query_buffer_object,


  // GL 4.4
  GL_ARB_buffer_storage,
  GL_ARB_clear_texture,
  GL_ARB_enhanced_layouts,
  GL_ARB_multi_bind,
  GL_ARB_query_buffer_object,
  GL_ARB_texture_mirror_clamp_to_edge,
  GL_ARB_texture_stencil8,
  GL_ARB_vertex_type_10f_11f_11f_rev,
  GL_ARB_bindless_texture,
  GL_ARB_sparse_texture,

  // GL 4.5
  GL_ARB_clip_control,
  GL_ARB_cull_distance,
  GL_ARB_ES3_1_compatibility,
  GL_ARB_conditional_render_inverted,
  GL_KHR_context_flush_control,
  GL_ARB_derivative_control,
  GL_ARB_direct_state_access,
  GL_ARB_get_texture_sub_image,
  GL_KHR_robustness,
  GL_KHR_blend_equation_advanced,
  GL_KHR_blend_equation_advanced_coherent,
  GL_KHR_robust_buffer_access_behavior,
  GL_ARB_shader_texture_image_samples,
  GL_ARB_texture_barrier,

  // GL 4.6
  GL_ARB_indirect_parameters,
  GL_ARB_pipeline_statistics_query,
  GL_ARB_polygon_offset_clamp,
  GL_KHR_no_error,
  GL_ARB_shader_atomic_counter_ops,
  GL_ARB_shader_draw_parameters,
  GL_ARB_shader_group_vote,
  GL_ARB_gl_spirv,
  GL_ARB_spirv_extensions,
  GL_ARB_texture_filter_anisotropic,
  GL_ARB_transform_feedback_overflow_query,

  GL_ARB_cl_event,
  GL_ARB_compute_variable_group_size,
  GL_ARB_debug_output,
  GL_ARB_robustness,
  GL_ARB_shader_stencil_export,
  GL_ATI_draw_buffers,
  GL_ATI_element_array,
  GL_ATI_envmap_bumpmap,
  GL_ATI_fragment_shader,
  GL_ATI_map_object_buffer,
  GL_ATI_pn_triangles,
  GL_ATI_separate_stencil,
  GL_ATI_text_fragment_shader,
  GL_ATI_texture_env_combine3,
  GL_ATI_texture_float,
  GL_ATI_texture_mirror_once,
  GL_ATI_vertex_array_object,
  GL_ATI_vertex_attrib_array_object,
  GL_ATI_vertex_streams,
  GL_ATI_meminfo,
  GL_AMD_performance_monitor,
  GL_AMD_texture_texture4,
  GL_AMD_vertex_shader_tesselator,
  GL_AMD_draw_buffers_blend,
  GL_AMD_shader_stencil_export,
  GL_AMD_seamless_cubemap_per_texture,
  GL_AMD_conservative_depth,
  GL_AMD_name_gen_delete,
  GL_AMD_debug_output,
  GL_AMD_transform_feedback3_lines_triangles,
  GL_AMD_depth_clamp_separate,
  GL_EXT_422_pixels,
  GL_EXT_abgr,
  GL_EXT_bgra,
  GL_EXT_blend_color,
  GL_EXT_blend_func_separate,
  GL_EXT_blend_logic_op,
  GL_EXT_blend_minmax,
  GL_EXT_blend_subtract,
  GL_EXT_clip_volume_hint,
  GL_EXT_cmyka,
  GL_EXT_color_matrix,
  GL_EXT_color_subtable,
  GL_EXT_compiled_vertex_array,
  GL_EXT_convolution,
  GL_EXT_coordinate_frame,
  GL_EXT_copy_texture,
  GL_EXT_cull_vertex,
  GL_EXT_draw_range_elements,
  GL_EXT_fog_coord,
  GL_EXT_framebuffer_object,
  GL_EXT_histogram,
  GL_EXT_index_array_formats,
  GL_EXT_index_func,
  GL_EXT_index_material,
  GL_EXT_index_texture,
  GL_EXT_light_texture,
  GL_EXT_misc_attribute,
  GL_EXT_multi_draw_arrays,
  GL_EXT_multisample,
  GL_EXT_packed_pixels,
  GL_EXT_paletted_texture,
  GL_EXT_pixel_transform,
  GL_EXT_pixel_transform_color_table,
  GL_EXT_point_parameters,
  GL_EXT_polygon_offset,
  GL_EXT_rescale_normal,
  GL_EXT_secondary_color,
  GL_EXT_separate_specular_color,
  GL_EXT_shadow_funcs,
  GL_EXT_shared_texture_palette,
  GL_EXT_stencil_two_side,
  GL_EXT_stencil_wrap,
  GL_EXT_subtexture,
  GL_EXT_texture,
  GL_EXT_texture3D,
  GL_EXT_texture_compression_s3tc,
  GL_EXT_texture_cube_map,
  GL_EXT_texture_edge_clamp,
  GL_EXT_texture_env_add,
  GL_EXT_texture_env_combine,
  GL_EXT_texture_env_dot3,
  GL_EXT_texture_filter_anisotropic,
  GL_EXT_texture_lod_bias,
  GL_EXT_texture_object,
  GL_EXT_texture_perturb_normal,
  GL_EXT_texture_rectangle,
  GL_EXT_vertex_array,
  GL_EXT_vertex_shader,
  GL_EXT_vertex_weighting,
  GL_EXT_depth_bounds_test,
  GL_EXT_texture_mirror_clamp,
  GL_EXT_blend_equation_separate,
  GL_EXT_pixel_buffer_object,
  GL_EXT_texture_compression_dxt1,
  GL_EXT_stencil_clear_tag,
  GL_EXT_packed_depth_stencil,
  GL_EXT_texture_sRGB,
  GL_EXT_framebuffer_blit,
  GL_EXT_framebuffer_multisample,
  GL_EXT_timer_query,
  GL_EXT_gpu_program_parameters,
  GL_EXT_bindable_uniform,
  GL_EXT_draw_buffers2,
  GL_EXT_draw_instanced,
  GL_EXT_framebuffer_sRGB,
  GL_EXT_geometry_shader4,
  GL_EXT_gpu_shader4,
  GL_EXT_packed_float,
  GL_EXT_texture_array,
  GL_EXT_texture_buffer_object,
  GL_EXT_texture_compression_latc,
  GL_EXT_texture_compression_rgtc,
  GL_EXT_texture_integer,
  GL_EXT_texture_shared_exponent,
  GL_EXT_transform_feedback,
  GL_EXT_direct_state_access,
  GL_EXT_vertex_array_bgra,
  GL_EXT_texture_swizzle,
  GL_EXT_provoking_vertex,
  GL_EXT_texture_snorm,
  GL_EXT_separate_shader_objects,
  GL_EXT_shader_image_load_store,
  GL_EXT_vertex_attrib_64bit,
  GL_EXT_texture_sRGB_decode,
  GL_FfdMaskSGIX,
  GL_HP_convolution_border_modes,
  GL_HP_image_transform,
  GL_HP_occlusion_test,
  GL_HP_texture_lighting,
  GL_IBM_cull_vertex,
  GL_IBM_multimode_draw_arrays,
  GL_IBM_rasterpos_clip,
  GL_IBM_texture_mirrored_repeat,
  GL_IBM_vertex_array_lists,
  GL_INGR_blend_func_separate,
  GL_INGR_color_clamp,
  GL_INGR_interlace_read,
  GL_INGR_palette_buffer,
  GL_INTEL_framebuffer_CMAA,
  GL_INTEL_parallel_arrays,
  GL_INTEL_texture_scissor,
  GL_MESA_resize_buffers,
  GL_MESA_window_pos,
  GL_NV_blend_square,
  GL_NV_copy_depth_to_color,
  GL_NV_depth_clamp,
  GL_NV_evaluators,
  GL_NV_fence,
  GL_NV_float_buffer,
  GL_NV_fog_distance,
  GL_NV_fragment_program,
  GL_NV_half_float,
  GL_NV_light_max_exponent,
  GL_NV_multisample_filter_hint,
  GL_NV_occlusion_query,
  GL_NV_packed_depth_stencil,
  GL_NV_pixel_data_range,
  GL_NV_point_sprite,
  GL_NV_primitive_restart,
  GL_NV_register_combiners,
  GL_NV_register_combiners2,
  GL_NV_texgen_emboss,
  GL_NV_texgen_reflection,
  GL_NV_texture_compression_vtc,
  GL_NV_texture_env_combine4,
  GL_NV_texture_expand_normal,
  GL_NV_texture_rectangle,
  GL_NV_texture_shader,
  GL_NV_texture_shader2,
  GL_NV_texture_shader3,
  GL_NV_vertex_array_range,
  GL_NV_vertex_array_range2,
  GL_NV_vertex_program,
  GL_NV_vertex_program1_1,
  GL_NV_vertex_program2,
  GL_NV_fragment_program_option,
  GL_NV_fragment_program2,
  GL_NV_vertex_program2_option,
  GL_NV_vertex_program3,
  GL_NV_depth_buffer_float,
  GL_NV_fragment_program4,
  GL_NV_framebuffer_multisample_coverage,
  GL_NV_geometry_program4,
  GL_NV_gpu_program4,
  GL_NV_parameter_buffer_object,
  GL_NV_transform_feedback,
  GL_NV_vertex_program4,
  GL_NV_conditional_render,
  GL_NV_conservative_raster,
  GL_NV_conservative_raster_dilate,
  GL_NV_present_video,
  GL_NV_explicit_multisample,
  GL_NV_transform_feedback2,
  GL_NV_video_capture,
  GL_NV_copy_image,
  GL_NV_parameter_buffer_object2,
  GL_NV_shader_buffer_load,
  GL_NV_vertex_buffer_unified_memory,
  GL_NV_gpu_program5,
  GL_NV_gpu_shader5,
  GL_NV_shader_buffer_store,
  GL_NV_tessellation_program5,
  GL_NV_vertex_attrib_integer_64bit,
  GL_NV_multisample_coverage,
  GL_NV_vdpau_interop,
  GL_NV_texture_barrier,
  GL_OML_interlace,
  GL_OML_resample,
  GL_OML_subsample,
  GL_OVR_multiview,
  GL_OVR_multiview2,
  GL_PGI_misc_hints,
  GL_PGI_vertex_hints,
  GL_REND_screen_coordinates,
  GL_S3_s3tc,
  GL_SGIS_detail_texture,
  GL_SGIS_fog_function,
  GL_SGIS_generate_mipmap,
  GL_SGIS_multisample,
  GL_SGIS_pixel_texture,
  GL_SGIS_point_line_texgen,
  GL_SGIS_point_parameters,
  GL_SGIS_sharpen_texture,
  GL_SGIS_texture4D,
  GL_SGIS_texture_border_clamp,
  GL_SGIS_texture_color_mask,
  GL_SGIS_texture_edge_clamp,
  GL_SGIS_texture_filter4,
  GL_SGIS_texture_lod,
  GL_SGIS_texture_select,
  GL_SGIX_async,
  GL_SGIX_async_histogram,
  GL_SGIX_async_pixel,
  GL_SGIX_blend_alpha_minmax,
  GL_SGIX_calligraphic_fragment,
  GL_SGIX_clipmap,
  GL_SGIX_convolution_accuracy,
  GL_SGIX_depth_pass_instrument,
  GL_SGIX_depth_texture,
  GL_SGIX_flush_raster,
  GL_SGIX_fog_offset,
  GL_SGIX_fog_scale,
  GL_SGIX_fragment_lighting,
  GL_SGIX_framezoom,
  GL_SGIX_igloo_interface,
  GL_SGIX_impact_pixel_texture,
  GL_SGIX_instruments,
  GL_SGIX_interlace,
  GL_SGIX_ir_instrument1,
  GL_SGIX_list_priority,
  GL_SGIX_pixel_texture,
  GL_SGIX_pixel_tiles,
  GL_SGIX_polynomial_ffd,
  GL_SGIX_reference_plane,
  GL_SGIX_resample,
  GL_SGIX_scalebias_hint,
  GL_SGIX_shadow,
  GL_SGIX_shadow_ambient,
  GL_SGIX_sprite,
  GL_SGIX_subsample,
  GL_SGIX_tag_sample_buffer,
  GL_SGIX_texture_add_env,
  GL_SGIX_texture_coordinate_clamp,
  GL_SGIX_texture_lod_bias,
  GL_SGIX_texture_multi_buffer,
  GL_SGIX_texture_scale_bias,
  GL_SGIX_texture_select,
  GL_SGIX_vertex_preclip,
  GL_SGIX_ycrcb,
  GL_SGIX_ycrcb_subsample,
  GL_SGIX_ycrcba,
  GL_SGI_color_matrix,
  GL_SGI_color_table,
  GL_SGI_depth_pass_instrument,
  GL_SGI_texture_color_table,
  GL_SUNX_constant_data,
  GL_SUN_convolution_border_modes,
  GL_SUN_global_alpha,
  GL_SUN_mesh_array,
  GL_SUN_slice_accum,
  GL_SUN_triangle_list,
  GL_SUN_vertex,

  // WGL
  GL_WIN_phong_shading,
  GL_WIN_specular_fog,
  WGL_3DFX_multisample,
  WGL_ARB_buffer_region,
  WGL_ARB_extensions_string,
  WGL_ARB_make_current_read,
  WGL_ARB_multisample,
  WGL_ARB_pbuffer,
  WGL_ARB_pixel_format,
  WGL_ARB_pixel_format_float,
  WGL_ARB_render_texture,
  WGL_ARB_create_context,
  WGL_ARB_create_context_profile,
  WGL_ARB_framebuffer_sRGB,
  WGL_ARB_create_context_robustness,
  WGL_ATI_pixel_format_float,
  WGL_AMD_gpu_association,
  WGL_EXT_depth_float,
  WGL_EXT_display_color_table,
  WGL_EXT_extensions_string,
  WGL_EXT_make_current_read,
  WGL_EXT_multisample,
  WGL_EXT_pbuffer,
  WGL_EXT_pixel_format,
  WGL_EXT_swap_control,
  WGL_EXT_create_context_es2_profile,
  WGL_I3D_digital_video_control,
  WGL_I3D_gamma,
  WGL_I3D_genlock,
  WGL_I3D_image_buffer,
  WGL_I3D_swap_frame_lock,
  WGL_I3D_swap_frame_usage,
  WGL_NV_float_buffer,
  WGL_NV_render_depth_texture,
  WGL_NV_render_texture_rectangle,
  WGL_NV_vertex_array_range,
  WGL_NV_present_video,
  WGL_NV_video_output,
  WGL_NV_swap_group,
  WGL_NV_gpu_affinity,
  WGL_NV_video_capture,
  WGL_NV_copy_image,
  WGL_NV_multisample_coverage,
  WGL_NV_DX_interop,
  WGL_OML_sync_control,
  WGL_3DL_stereo_control,
  WGL_ARB_context_flush_control,
  WIN_draw_range_elements,
  WIN_swap_hint,

  // GLX
  GLX_VERSION_1_3,
  GLX_VERSION_1_4,
  GLX_ARB_multisample,
  GLX_ARB_fbconfig_float,
  GLX_ARB_get_proc_address,
  GLX_ARB_create_context,
  GLX_ARB_create_context_profile,
  GLX_ARB_vertex_buffer_object,
  GLX_ARB_framebuffer_sRGB,
  GLX_ARB_create_context_robustness,
  GLX_EXT_visual_info,
  GLX_EXT_visual_rating,
  GLX_EXT_import_context,
  GLX_EXT_fbconfig_packed_float,
  GLX_EXT_framebuffer_sRGB,
  GLX_EXT_texture_from_pixmap,
  GLX_EXT_swap_control,
  GLX_ARB_context_flush_control,
  GLX_EXT_create_context_es2_profile : Boolean;

const
  // GL_VERSION_1_1
  { AttribMask }
  GL_DEPTH_BUFFER_BIT = $00000100;
  GL_STENCIL_BUFFER_BIT = $00000400;
  GL_COLOR_BUFFER_BIT = $00004000;
  GL_TRUE = 1;
  GL_FALSE = 0;
  // BeginMode 
  GL_POINTS = $0000;
  GL_LINES = $0001;
  GL_LINE_LOOP = $0002;
  GL_LINE_STRIP = $0003;
  GL_TRIANGLES = $0004;
  GL_TRIANGLE_STRIP = $0005;
  GL_TRIANGLE_FAN = $0006;
  { AlphaFunction }
  GL_NEVER = $0200;
  GL_LESS = $0201;
  GL_EQUAL = $0202;
  GL_LEQUAL = $0203;
  GL_GREATER = $0204;
  GL_NOTEQUAL = $0205;
  GL_GEQUAL = $0206;
  GL_ALWAYS = $0207;
  { BlendingFactorDest }
  GL_ZERO = 0;
  GL_ONE = 1;
  GL_SRC_COLOR = $0300;
  GL_ONE_MINUS_SRC_COLOR = $0301;
  GL_SRC_ALPHA = $0302;
  GL_ONE_MINUS_SRC_ALPHA = $0303;
  GL_DST_ALPHA = $0304;
  GL_ONE_MINUS_DST_ALPHA = $0305;
  { BlendingFactorSrc }
  GL_DST_COLOR = $0306;
  GL_ONE_MINUS_DST_COLOR = $0307;
  GL_SRC_ALPHA_SATURATE = $0308;
  { DrawBufferMode }
  GL_NONE = 0;
  GL_FRONT_LEFT = $0400;
  GL_FRONT_RIGHT = $0401;
  GL_BACK_LEFT = $0402;
  GL_BACK_RIGHT = $0403;
  GL_FRONT = $0404;
  GL_BACK = $0405;
  GL_LEFT = $0406;
  GL_RIGHT = $0407;
  GL_FRONT_AND_BACK = $0408;
  { ErrorCode }
  GL_NO_ERROR = 0;
  GL_INVALID_ENUM = $0500;
  GL_INVALID_VALUE = $0501;
  GL_INVALID_OPERATION = $0502;
  GL_OUT_OF_MEMORY = $0505;
  { FrontFaceDirection }
  GL_CW = $0900;
  GL_CCW = $0901;
  { GetPName }
  GL_POINT_SIZE = $0B11;
  GL_POINT_SIZE_RANGE = $0B12;
  GL_POINT_SIZE_GRANULARITY = $0B13;
  GL_LINE_SMOOTH = $0B20;
  GL_LINE_WIDTH = $0B21;
  GL_LINE_WIDTH_RANGE = $0B22;
  GL_LINE_WIDTH_GRANULARITY = $0B23;
  GL_POLYGON_SMOOTH = $0B41;
  GL_CULL_FACE = $0B44;
  GL_CULL_FACE_MODE = $0B45;
  GL_FRONT_FACE = $0B46;
  GL_DEPTH_RANGE = $0B70;
  GL_DEPTH_TEST = $0B71;
  GL_DEPTH_WRITEMASK = $0B72;
  GL_DEPTH_CLEAR_VALUE = $0B73;
  GL_DEPTH_FUNC = $0B74;
  GL_STENCIL_TEST = $0B90;
  GL_STENCIL_CLEAR_VALUE = $0B91;
  GL_STENCIL_FUNC = $0B92;
  GL_STENCIL_VALUE_MASK = $0B93;
  GL_STENCIL_FAIL = $0B94;
  GL_STENCIL_PASS_DEPTH_FAIL = $0B95;
  GL_STENCIL_PASS_DEPTH_PASS = $0B96;
  GL_STENCIL_REF = $0B97;
  GL_STENCIL_WRITEMASK = $0B98;
  GL_VIEWPORT = $0BA2;
  GL_DITHER = $0BD0;
  GL_BLEND_DST = $0BE0;
  GL_BLEND_SRC = $0BE1;
  GL_BLEND = $0BE2;
  GL_LOGIC_OP_MODE = $0BF0;
  GL_COLOR_LOGIC_OP = $0BF2;
  GL_DRAW_BUFFER = $0C01;
  GL_READ_BUFFER = $0C02;
  GL_SCISSOR_BOX = $0C10;
  GL_SCISSOR_TEST = $0C11;
  GL_COLOR_CLEAR_VALUE = $0C22;
  GL_COLOR_WRITEMASK = $0C23;
  GL_DOUBLEBUFFER = $0C32;
  GL_STEREO = $0C33;
  GL_LINE_SMOOTH_HINT = $0C52;
  GL_POLYGON_SMOOTH_HINT = $0C53;
  GL_UNPACK_SWAP_BYTES = $0CF0;
  GL_UNPACK_LSB_FIRST = $0CF1;
  GL_UNPACK_ROW_LENGTH = $0CF2;
  GL_UNPACK_SKIP_ROWS = $0CF3;
  GL_UNPACK_SKIP_PIXELS = $0CF4;
  GL_UNPACK_ALIGNMENT = $0CF5;
  GL_PACK_SWAP_BYTES = $0D00;
  GL_PACK_LSB_FIRST = $0D01;
  GL_PACK_ROW_LENGTH = $0D02;
  GL_PACK_SKIP_ROWS = $0D03;
  GL_PACK_SKIP_PIXELS = $0D04;
  GL_PACK_ALIGNMENT = $0D05;
  GL_MAX_TEXTURE_SIZE = $0D33;
  GL_MAX_VIEWPORT_DIMS = $0D3A;
  GL_SUBPIXEL_BITS = $0D50;
  GL_TEXTURE_1D = $0DE0;
  GL_TEXTURE_2D = $0DE1;
  GL_POLYGON_OFFSET_UNITS = $2A00;
  GL_POLYGON_OFFSET_POINT = $2A01;
  GL_POLYGON_OFFSET_LINE = $2A02;
  GL_POLYGON_OFFSET_FILL = $8037;
  GL_POLYGON_OFFSET_FACTOR = $8038;
  GL_TEXTURE_BINDING_1D = $8068;
  GL_TEXTURE_BINDING_2D = $8069;
  { GetTextureParameter }
  GL_TEXTURE_WIDTH = $1000;
  GL_TEXTURE_HEIGHT = $1001;
  GL_TEXTURE_INTERNAL_FORMAT = $1003;
  GL_TEXTURE_BORDER_COLOR = $1004;
  GL_TEXTURE_BORDER = $1005;
  GL_TEXTURE_RED_SIZE = $805C;
  GL_TEXTURE_GREEN_SIZE = $805D;
  GL_TEXTURE_BLUE_SIZE = $805E;
  GL_TEXTURE_ALPHA_SIZE = $805F;
  { HintMode }
  GL_DONT_CARE = $1100;
  GL_FASTEST = $1101;
  GL_NICEST = $1102;
  { DataType }
  GL_BYTE = $1400;
  GL_UNSIGNED_BYTE = $1401;
  GL_SHORT = $1402;
  GL_UNSIGNED_SHORT = $1403;
  GL_INT = $1404;
  GL_UNSIGNED_INT = $1405;
  GL_FLOAT = $1406;
  GL_DOUBLE = $140A;
  { LogicOp }
  GL_CLEAR = $1500;
  GL_AND = $1501;
  GL_AND_REVERSE = $1502;
  GL_COPY = $1503;
  GL_AND_INVERTED = $1504;
  GL_NOOP = $1505;
  GL_XOR = $1506;
  GL_OR = $1507;
  GL_NOR = $1508;
  GL_EQUIV = $1509;
  GL_INVERT = $150A;
  GL_OR_REVERSE = $150B;
  GL_COPY_INVERTED = $150C;
  GL_OR_INVERTED = $150D;
  GL_NAND = $150E;
  GL_SET = $150F;
  { MatrixMode (for gl3.h, FBO attachment type) }
  GL_TEXTURE = $1702;
  { PixelCopyType }
  GL_COLOR = $1800;
  GL_DEPTH = $1801;
  GL_STENCIL = $1802;
  { PixelFormat }
  GL_STENCIL_INDEX = $1901;
  GL_DEPTH_COMPONENT = $1902;
  GL_RED = $1903;
  GL_GREEN = $1904;
  GL_BLUE = $1905;
  GL_ALPHA = $1906;
  GL_RGB = $1907;
  GL_RGBA = $1908;
  { PolygonMode }
  GL_POINT = $1B00;
  GL_LINE = $1B01;
  GL_FILL = $1B02;
  { StencilOp }
  GL_KEEP = $1E00;
  GL_REPLACE = $1E01;
  GL_INCR = $1E02;
  GL_DECR = $1E03;
  { StringName }
  GL_VENDOR = $1F00;
  GL_RENDERER = $1F01;
  GL_VERSION = $1F02;
  GL_EXTENSIONS = $1F03;
  { TextureMagFilter }
  GL_NEAREST = $2600;
  GL_LINEAR = $2601;
  { TextureMinFilter }
  GL_NEAREST_MIPMAP_NEAREST = $2700;
  GL_LINEAR_MIPMAP_NEAREST = $2701;
  GL_NEAREST_MIPMAP_LINEAR = $2702;
  GL_LINEAR_MIPMAP_LINEAR = $2703;
  { TextureParameterName }
  GL_TEXTURE_MAG_FILTER = $2800;
  GL_TEXTURE_MIN_FILTER = $2801;
  GL_TEXTURE_WRAP_S = $2802;
  GL_TEXTURE_WRAP_T = $2803;
  { TextureTarget }
  GL_PROXY_TEXTURE_1D = $8063;
  GL_PROXY_TEXTURE_2D = $8064;
  { TextureWrapMode }
  GL_REPEAT = $2901;
  { PixelInternalFormat }
  GL_R3_G3_B2 = $2A10;
  GL_RGB4 = $804F;
  GL_RGB5 = $8050;
  GL_RGB8 = $8051;
  GL_RGB10 = $8052;
  GL_RGB12 = $8053;
  GL_RGB16 = $8054;
  GL_RGBA2 = $8055;
  GL_RGBA4 = $8056;
  GL_RGB5_A1 = $8057;
  GL_RGBA8 = $8058;
  GL_RGB10_A2 = $8059;
  GL_RGBA12 = $805A;
  GL_RGBA16 = $805B;
{$IFDEF USE_DEPRECATED}
  GL_ACCUM = $0100;
  GL_LOAD = $0101;
  GL_RETURN = $0102;
  GL_MULT = $0103;
  GL_ADD = $0104;
  GL_CURRENT_BIT = $00000001;
  GL_POINT_BIT = $00000002;
  GL_LINE_BIT = $00000004;
  GL_POLYGON_BIT = $00000008;
  GL_POLYGON_STIPPLE_BIT = $00000010;
  GL_PIXEL_MODE_BIT = $00000020;
  GL_LIGHTING_BIT = $00000040;
  GL_FOG_BIT = $00000080;
  GL_ACCUM_BUFFER_BIT = $00000200;
  GL_VIEWPORT_BIT = $00000800;
  GL_TRANSFORM_BIT = $00001000;
  GL_ENABLE_BIT = $00002000;
  GL_HINT_BIT = $00008000;
  GL_EVAL_BIT = $00010000;
  GL_LIST_BIT = $00020000;
  GL_TEXTURE_BIT = $00040000;
  GL_SCISSOR_BIT = $00080000;
  GL_ALL_ATTRIB_BITS = $000FFFFF;
  GL_QUADS = $0007;
  GL_QUAD_STRIP = $0008;
  GL_POLYGON = $0009;
  GL_CLIP_PLANE0 = $3000;
  GL_CLIP_PLANE1 = $3001;
  GL_CLIP_PLANE2 = $3002;
  GL_CLIP_PLANE3 = $3003;
  GL_CLIP_PLANE4 = $3004;
  GL_CLIP_PLANE5 = $3005;
  GL_2_BYTES = $1407;
  GL_3_BYTES = $1408;
  GL_4_BYTES = $1409;
  GL_AUX0 = $0409;
  GL_AUX1 = $040A;
  GL_AUX2 = $040B;
  GL_AUX3 = $040C;
  GL_STACK_OVERFLOW = $0503;
  GL_STACK_UNDERFLOW = $0504;
  GL_2D = $0600;
  GL_3D = $0601;
  GL_3D_COLOR = $0602;
  GL_3D_COLOR_TEXTURE = $0603;
  GL_4D_COLOR_TEXTURE = $0604;
  GL_PASS_THROUGH_TOKEN = $0700;
  GL_POINT_TOKEN = $0701;
  GL_LINE_TOKEN = $0702;
  GL_POLYGON_TOKEN = $0703;
  GL_BITMAP_TOKEN = $0704;
  GL_DRAW_PIXEL_TOKEN = $0705;
  GL_COPY_PIXEL_TOKEN = $0706;
  GL_LINE_RESET_TOKEN = $0707;
  GL_EXP = $0800;
  GL_EXP2 = $0801;
  GL_COEFF = $0A00;
  GL_ORDER = $0A01;
  GL_DOMAIN = $0A02;
  GL_CURRENT_COLOR = $0B00;
  GL_CURRENT_INDEX = $0B01;
  GL_CURRENT_NORMAL = $0B02;
  GL_CURRENT_TEXTURE_COORDS = $0B03;
  GL_CURRENT_RASTER_COLOR = $0B04;
  GL_CURRENT_RASTER_INDEX = $0B05;
  GL_CURRENT_RASTER_TEXTURE_COORDS = $0B06;
  GL_CURRENT_RASTER_POSITION = $0B07;
  GL_CURRENT_RASTER_POSITION_VALID = $0B08;
  GL_CURRENT_RASTER_DISTANCE = $0B09;
  GL_POINT_SMOOTH = $0B10;
  GL_LINE_STIPPLE = $0B24;
  GL_LINE_STIPPLE_PATTERN = $0B25;
  GL_LINE_STIPPLE_REPEAT = $0B26;
  GL_LIST_MODE = $0B30;
  GL_MAX_LIST_NESTING = $0B31;
  GL_LIST_BASE = $0B32;
  GL_LIST_INDEX = $0B33;
  GL_POLYGON_MODE = $0B40;
  GL_POLYGON_STIPPLE = $0B42;
  GL_EDGE_FLAG = $0B43;
  GL_LIGHTING = $0B50;
  GL_LIGHT_MODEL_LOCAL_VIEWER = $0B51;
  GL_LIGHT_MODEL_TWO_SIDE = $0B52;
  GL_LIGHT_MODEL_AMBIENT = $0B53;
  GL_SHADE_MODEL = $0B54;
  GL_COLOR_MATERIAL_FACE = $0B55;
  GL_COLOR_MATERIAL_PARAMETER = $0B56;
  GL_COLOR_MATERIAL = $0B57;
  GL_FOG = $0B60;
  GL_FOG_INDEX = $0B61;
  GL_FOG_DENSITY = $0B62;
  GL_FOG_START = $0B63;
  GL_FOG_END = $0B64;
  GL_FOG_MODE = $0B65;
  GL_FOG_COLOR = $0B66;
  GL_ACCUM_CLEAR_VALUE = $0B80;
  GL_MATRIX_MODE = $0BA0;
  GL_NORMALIZE = $0BA1;
  GL_MODELVIEW_STACK_DEPTH = $0BA3;
  GL_PROJECTION_STACK_DEPTH = $0BA4;
  GL_TEXTURE_STACK_DEPTH = $0BA5;
  GL_MODELVIEW_MATRIX = $0BA6;
  GL_PROJECTION_MATRIX = $0BA7;
  GL_TEXTURE_MATRIX = $0BA8;
  GL_ATTRIB_STACK_DEPTH = $0BB0;
  GL_CLIENT_ATTRIB_STACK_DEPTH = $0BB1;
  GL_ALPHA_TEST = $0BC0;
  GL_ALPHA_TEST_FUNC = $0BC1;
  GL_ALPHA_TEST_REF = $0BC2;
  GL_INDEX_LOGIC_OP = $0BF1;
  GL_AUX_BUFFERS = $0C00;
  GL_INDEX_CLEAR_VALUE = $0C20;
  GL_INDEX_WRITEMASK = $0C21;
  GL_INDEX_MODE = $0C30;
  GL_RGBA_MODE = $0C31;
  GL_RENDER_MODE = $0C40;
  GL_PERSPECTIVE_CORRECTION_HINT = $0C50;
  GL_POINT_SMOOTH_HINT = $0C51;
  GL_FOG_HINT = $0C54;
  GL_TEXTURE_GEN_S = $0C60;
  GL_TEXTURE_GEN_T = $0C61;
  GL_TEXTURE_GEN_R = $0C62;
  GL_TEXTURE_GEN_Q = $0C63;
  GL_PIXEL_MAP_I_TO_I = $0C70;
  GL_PIXEL_MAP_S_TO_S = $0C71;
  GL_PIXEL_MAP_I_TO_R = $0C72;
  GL_PIXEL_MAP_I_TO_G = $0C73;
  GL_PIXEL_MAP_I_TO_B = $0C74;
  GL_PIXEL_MAP_I_TO_A = $0C75;
  GL_PIXEL_MAP_R_TO_R = $0C76;
  GL_PIXEL_MAP_G_TO_G = $0C77;
  GL_PIXEL_MAP_B_TO_B = $0C78;
  GL_PIXEL_MAP_A_TO_A = $0C79;
  GL_PIXEL_MAP_I_TO_I_SIZE = $0CB0;
  GL_PIXEL_MAP_S_TO_S_SIZE = $0CB1;
  GL_PIXEL_MAP_I_TO_R_SIZE = $0CB2;
  GL_PIXEL_MAP_I_TO_G_SIZE = $0CB3;
  GL_PIXEL_MAP_I_TO_B_SIZE = $0CB4;
  GL_PIXEL_MAP_I_TO_A_SIZE = $0CB5;
  GL_PIXEL_MAP_R_TO_R_SIZE = $0CB6;
  GL_PIXEL_MAP_G_TO_G_SIZE = $0CB7;
  GL_PIXEL_MAP_B_TO_B_SIZE = $0CB8;
  GL_PIXEL_MAP_A_TO_A_SIZE = $0CB9;
  GL_MAP_COLOR = $0D10;
  GL_MAP_STENCIL = $0D11;
  GL_INDEX_SHIFT = $0D12;
  GL_INDEX_OFFSET = $0D13;
  GL_RED_SCALE = $0D14;
  GL_RED_BIAS = $0D15;
  GL_ZOOM_X = $0D16;
  GL_ZOOM_Y = $0D17;
  GL_GREEN_SCALE = $0D18;
  GL_GREEN_BIAS = $0D19;
  GL_BLUE_SCALE = $0D1A;
  GL_BLUE_BIAS = $0D1B;
  GL_ALPHA_SCALE = $0D1C;
  GL_ALPHA_BIAS = $0D1D;
  GL_DEPTH_SCALE = $0D1E;
  GL_DEPTH_BIAS = $0D1F;
  GL_MAX_EVAL_ORDER = $0D30;
  GL_MAX_LIGHTS = $0D31;
  GL_MAX_CLIP_PLANES = $0D32;
  GL_MAX_PIXEL_MAP_TABLE = $0D34;
  GL_MAX_ATTRIB_STACK_DEPTH = $0D35;
  GL_MAX_MODELVIEW_STACK_DEPTH = $0D36;
  GL_MAX_NAME_STACK_DEPTH = $0D37;
  GL_MAX_PROJECTION_STACK_DEPTH = $0D38;
  GL_MAX_TEXTURE_STACK_DEPTH = $0D39;
  GL_MAX_CLIENT_ATTRIB_STACK_DEPTH = $0D3B;
  GL_INDEX_BITS = $0D51;
  GL_RED_BITS = $0D52;
  GL_GREEN_BITS = $0D53;
  GL_BLUE_BITS = $0D54;
  GL_ALPHA_BITS = $0D55;
  GL_DEPTH_BITS = $0D56;
  GL_STENCIL_BITS = $0D57;
  GL_ACCUM_RED_BITS = $0D58;
  GL_ACCUM_GREEN_BITS = $0D59;
  GL_ACCUM_BLUE_BITS = $0D5A;
  GL_ACCUM_ALPHA_BITS = $0D5B;
  GL_NAME_STACK_DEPTH = $0D70;
  GL_AUTO_NORMAL = $0D80;
  GL_MAP1_COLOR_4 = $0D90;
  GL_MAP1_INDEX = $0D91;
  GL_MAP1_NORMAL = $0D92;
  GL_MAP1_TEXTURE_COORD_1 = $0D93;
  GL_MAP1_TEXTURE_COORD_2 = $0D94;
  GL_MAP1_TEXTURE_COORD_3 = $0D95;
  GL_MAP1_TEXTURE_COORD_4 = $0D96;
  GL_MAP1_VERTEX_3 = $0D97;
  GL_MAP1_VERTEX_4 = $0D98;
  GL_MAP2_COLOR_4 = $0DB0;
  GL_MAP2_INDEX = $0DB1;
  GL_MAP2_NORMAL = $0DB2;
  GL_MAP2_TEXTURE_COORD_1 = $0DB3;
  GL_MAP2_TEXTURE_COORD_2 = $0DB4;
  GL_MAP2_TEXTURE_COORD_3 = $0DB5;
  GL_MAP2_TEXTURE_COORD_4 = $0DB6;
  GL_MAP2_VERTEX_3 = $0DB7;
  GL_MAP2_VERTEX_4 = $0DB8;
  GL_MAP1_GRID_DOMAIN = $0DD0;
  GL_MAP1_GRID_SEGMENTS = $0DD1;
  GL_MAP2_GRID_DOMAIN = $0DD2;
  GL_MAP2_GRID_SEGMENTS = $0DD3;
  GL_FEEDBACK_BUFFER_POINTER = $0DF0;
  GL_FEEDBACK_BUFFER_SIZE = $0DF1;
  GL_FEEDBACK_BUFFER_TYPE = $0DF2;
  GL_SELECTION_BUFFER_POINTER = $0DF3;
  GL_SELECTION_BUFFER_SIZE = $0DF4;
  GL_LIGHT0 = $4000;
  GL_LIGHT1 = $4001;
  GL_LIGHT2 = $4002;
  GL_LIGHT3 = $4003;
  GL_LIGHT4 = $4004;
  GL_LIGHT5 = $4005;
  GL_LIGHT6 = $4006;
  GL_LIGHT7 = $4007;
  GL_AMBIENT = $1200;
  GL_DIFFUSE = $1201;
  GL_SPECULAR = $1202;
  GL_POSITION = $1203;
  GL_SPOT_DIRECTION = $1204;
  GL_SPOT_EXPONENT = $1205;
  GL_SPOT_CUTOFF = $1206;
  GL_CONSTANT_ATTENUATION = $1207;
  GL_LINEAR_ATTENUATION = $1208;
  GL_QUADRATIC_ATTENUATION = $1209;
  GL_COMPILE = $1300;
  GL_COMPILE_AND_EXECUTE = $1301;
  GL_EMISSION = $1600;
  GL_SHININESS = $1601;
  GL_AMBIENT_AND_DIFFUSE = $1602;
  GL_COLOR_INDEXES = $1603;
  GL_MODELVIEW = $1700;
  GL_PROJECTION = $1701;
  GL_COLOR_INDEX = $1900;
  GL_LUMINANCE = $1909;
  GL_LUMINANCE_ALPHA = $190A;
  GL_BITMAP = $1A00;
  GL_RENDER = $1C00;
  GL_FEEDBACK = $1C01;
  GL_SELECT = $1C02;
  GL_FLAT = $1D00;
  GL_SMOOTH = $1D01;
  GL_S = $2000;
  GL_T = $2001;
  GL_R = $2002;
  GL_Q = $2003;
  GL_MODULATE = $2100;
  GL_DECAL = $2101;
  GL_TEXTURE_ENV_MODE = $2200;
  GL_TEXTURE_ENV_COLOR = $2201;
  GL_TEXTURE_ENV = $2300;
  GL_EYE_LINEAR = $2400;
  GL_OBJECT_LINEAR = $2401;
  GL_SPHERE_MAP = $2402;
  GL_TEXTURE_GEN_MODE = $2500;
  GL_OBJECT_PLANE = $2501;
  GL_EYE_PLANE = $2502;
  GL_CLAMP = $2900;
  GL_CLIENT_PIXEL_STORE_BIT = $00000001;
  GL_CLIENT_VERTEX_ARRAY_BIT = $00000002;
  GL_CLIENT_ALL_ATTRIB_BITS = $FFFFFFFF;
  GL_ALPHA4 = $803B;
  GL_ALPHA8 = $803C;
  GL_ALPHA12 = $803D;
  GL_ALPHA16 = $803E;
  GL_LUMINANCE4 = $803F;
  GL_LUMINANCE8 = $8040;
  GL_LUMINANCE12 = $8041;
  GL_LUMINANCE16 = $8042;
  GL_LUMINANCE4_ALPHA4 = $8043;
  GL_LUMINANCE6_ALPHA2 = $8044;
  GL_LUMINANCE8_ALPHA8 = $8045;
  GL_LUMINANCE12_ALPHA4 = $8046;
  GL_LUMINANCE12_ALPHA12 = $8047;
  GL_LUMINANCE16_ALPHA16 = $8048;
  GL_INTENSITY = $8049;
  GL_INTENSITY4 = $804A;
  GL_INTENSITY8 = $804B;
  GL_INTENSITY12 = $804C;
  GL_INTENSITY16 = $804D;
  GL_TEXTURE_LUMINANCE_SIZE = $8060;
  GL_TEXTURE_INTENSITY_SIZE = $8061;
  GL_TEXTURE_PRIORITY = $8066;
  GL_TEXTURE_RESIDENT = $8067;
  GL_VERTEX_ARRAY = $8074;
  GL_NORMAL_ARRAY = $8075;
  GL_COLOR_ARRAY = $8076;
  GL_INDEX_ARRAY = $8077;
  GL_TEXTURE_COORD_ARRAY = $8078;
  GL_EDGE_FLAG_ARRAY = $8079;
  GL_VERTEX_ARRAY_SIZE = $807A;
  GL_VERTEX_ARRAY_TYPE = $807B;
  GL_VERTEX_ARRAY_STRIDE = $807C;
  GL_NORMAL_ARRAY_TYPE = $807E;
  GL_NORMAL_ARRAY_STRIDE = $807F;
  GL_COLOR_ARRAY_SIZE = $8081;
  GL_COLOR_ARRAY_TYPE = $8082;
  GL_COLOR_ARRAY_STRIDE = $8083;
  GL_INDEX_ARRAY_TYPE = $8085;
  GL_INDEX_ARRAY_STRIDE = $8086;
  GL_TEXTURE_COORD_ARRAY_SIZE = $8088;
  GL_TEXTURE_COORD_ARRAY_TYPE = $8089;
  GL_TEXTURE_COORD_ARRAY_STRIDE = $808A;
  GL_EDGE_FLAG_ARRAY_STRIDE = $808C;
  GL_VERTEX_ARRAY_POINTER = $808E;
  GL_NORMAL_ARRAY_POINTER = $808F;
  GL_COLOR_ARRAY_POINTER = $8090;
  GL_INDEX_ARRAY_POINTER = $8091;
  GL_TEXTURE_COORD_ARRAY_POINTER = $8092;
  GL_EDGE_FLAG_ARRAY_POINTER = $8093;
  GL_V2F = $2A20;
  GL_V3F = $2A21;
  GL_C4UB_V2F = $2A22;
  GL_C4UB_V3F = $2A23;
  GL_C3F_V3F = $2A24;
  GL_N3F_V3F = $2A25;
  GL_C4F_N3F_V3F = $2A26;
  GL_T2F_V3F = $2A27;
  GL_T4F_V4F = $2A28;
  GL_T2F_C4UB_V3F = $2A29;
  GL_T2F_C3F_V3F = $2A2A;
  GL_T2F_N3F_V3F = $2A2B;
  GL_T2F_C4F_N3F_V3F = $2A2C;
  GL_T4F_C4F_N3F_V4F = $2A2D;
  GL_COLOR_TABLE_FORMAT_EXT = $80D8;
  GL_COLOR_TABLE_WIDTH_EXT = $80D9;
  GL_COLOR_TABLE_RED_SIZE_EXT = $80DA;
  GL_COLOR_TABLE_GREEN_SIZE_EXT = $80DB;
  GL_COLOR_TABLE_BLUE_SIZE_EXT = $80DC;
  GL_COLOR_TABLE_ALPHA_SIZE_EXT = $80DD;
  GL_COLOR_TABLE_LUMINANCE_SIZE_EXT = $80DE;
  GL_COLOR_TABLE_INTENSITY_SIZE_EXT = $80DF;
  GL_LOGIC_OP = GL_INDEX_LOGIC_OP;
  GL_TEXTURE_COMPONENTS = GL_TEXTURE_INTERNAL_FORMAT;
{$ENDIF}

  // GL_VERSION_1_2
  GL_UNSIGNED_BYTE_3_3_2 = $8032;
  GL_UNSIGNED_SHORT_4_4_4_4 = $8033;
  GL_UNSIGNED_SHORT_5_5_5_1 = $8034;
  GL_UNSIGNED_INT_8_8_8_8 = $8035;
  GL_UNSIGNED_INT_10_10_10_2 = $8036;
  GL_TEXTURE_BINDING_3D = $806A;
  GL_PACK_SKIP_IMAGES = $806B;
  GL_PACK_IMAGE_HEIGHT = $806C;
  GL_UNPACK_SKIP_IMAGES = $806D;
  GL_UNPACK_IMAGE_HEIGHT = $806E;
  GL_TEXTURE_3D = $806F;
  GL_PROXY_TEXTURE_3D = $8070;
  GL_TEXTURE_DEPTH = $8071;
  GL_TEXTURE_WRAP_R = $8072;
  GL_MAX_3D_TEXTURE_SIZE = $8073;
  GL_UNSIGNED_BYTE_2_3_3_REV = $8362;
  GL_UNSIGNED_SHORT_5_6_5 = $8363;
  GL_UNSIGNED_SHORT_5_6_5_REV = $8364;
  GL_UNSIGNED_SHORT_4_4_4_4_REV = $8365;
  GL_UNSIGNED_SHORT_1_5_5_5_REV = $8366;
  GL_UNSIGNED_INT_8_8_8_8_REV = $8367;
  GL_UNSIGNED_INT_2_10_10_10_REV = $8368;
  GL_BGR = $80E0;
  GL_BGRA = $80E1;
  GL_MAX_ELEMENTS_VERTICES = $80E8;
  GL_MAX_ELEMENTS_INDICES = $80E9;
  GL_CLAMP_TO_EDGE = $812F;
  GL_TEXTURE_MIN_LOD = $813A;
  GL_TEXTURE_MAX_LOD = $813B;
  GL_TEXTURE_BASE_LEVEL = $813C;
  GL_TEXTURE_MAX_LEVEL = $813D;
  GL_SMOOTH_POINT_SIZE_RANGE = $0B12;
  GL_SMOOTH_POINT_SIZE_GRANULARITY = $0B13;
  GL_SMOOTH_LINE_WIDTH_RANGE = $0B22;
  GL_SMOOTH_LINE_WIDTH_GRANULARITY = $0B23;
  GL_ALIASED_LINE_WIDTH_RANGE = $846E;
{$IFDEF USE_DEPRECATED}
  GL_RESCALE_NORMAL = $803A;
  GL_LIGHT_MODEL_COLOR_CONTROL = $81F8;
  GL_SINGLE_COLOR = $81F9;
  GL_SEPARATE_SPECULAR_COLOR = $81FA;
  GL_ALIASED_POINT_SIZE_RANGE = $846D;
{$ENDIF}

  // GL_VERSION_1_3
  GL_TEXTURE0 = $84C0;
  GL_TEXTURE1 = $84C1;
  GL_TEXTURE2 = $84C2;
  GL_TEXTURE3 = $84C3;
  GL_TEXTURE4 = $84C4;
  GL_TEXTURE5 = $84C5;
  GL_TEXTURE6 = $84C6;
  GL_TEXTURE7 = $84C7;
  GL_TEXTURE8 = $84C8;
  GL_TEXTURE9 = $84C9;
  GL_TEXTURE10 = $84CA;
  GL_TEXTURE11 = $84CB;
  GL_TEXTURE12 = $84CC;
  GL_TEXTURE13 = $84CD;
  GL_TEXTURE14 = $84CE;
  GL_TEXTURE15 = $84CF;
  GL_TEXTURE16 = $84D0;
  GL_TEXTURE17 = $84D1;
  GL_TEXTURE18 = $84D2;
  GL_TEXTURE19 = $84D3;
  GL_TEXTURE20 = $84D4;
  GL_TEXTURE21 = $84D5;
  GL_TEXTURE22 = $84D6;
  GL_TEXTURE23 = $84D7;
  GL_TEXTURE24 = $84D8;
  GL_TEXTURE25 = $84D9;
  GL_TEXTURE26 = $84DA;
  GL_TEXTURE27 = $84DB;
  GL_TEXTURE28 = $84DC;
  GL_TEXTURE29 = $84DD;
  GL_TEXTURE30 = $84DE;
  GL_TEXTURE31 = $84DF;
  GL_ACTIVE_TEXTURE = $84E0;
  GL_MULTISAMPLE = $809D;
  GL_SAMPLE_ALPHA_TO_COVERAGE = $809E;
  GL_SAMPLE_ALPHA_TO_ONE = $809F;
  GL_SAMPLE_COVERAGE = $80A0;
  GL_SAMPLE_BUFFERS = $80A8;
  GL_SAMPLES = $80A9;
  GL_SAMPLE_COVERAGE_VALUE = $80AA;
  GL_SAMPLE_COVERAGE_INVERT = $80AB;
  GL_TEXTURE_CUBE_MAP = $8513;
  GL_TEXTURE_BINDING_CUBE_MAP = $8514;
  GL_TEXTURE_CUBE_MAP_POSITIVE_X = $8515;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_X = $8516;
  GL_TEXTURE_CUBE_MAP_POSITIVE_Y = $8517;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_Y = $8518;
  GL_TEXTURE_CUBE_MAP_POSITIVE_Z = $8519;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_Z = $851A;
  GL_PROXY_TEXTURE_CUBE_MAP = $851B;
  GL_MAX_CUBE_MAP_TEXTURE_SIZE = $851C;
  GL_COMPRESSED_RGB = $84ED;
  GL_COMPRESSED_RGBA = $84EE;
  GL_TEXTURE_COMPRESSION_HINT = $84EF;
  GL_TEXTURE_COMPRESSED_IMAGE_SIZE = $86A0;
  GL_TEXTURE_COMPRESSED = $86A1;
  GL_NUM_COMPRESSED_TEXTURE_FORMATS = $86A2;
  GL_COMPRESSED_TEXTURE_FORMATS = $86A3;
  GL_CLAMP_TO_BORDER = $812D;
{$IFDEF USE_DEPRECATED}
  GL_CLIENT_ACTIVE_TEXTURE = $84E1;
  GL_MAX_TEXTURE_UNITS = $84E2;
  GL_TRANSPOSE_MODELVIEW_MATRIX = $84E3;
  GL_TRANSPOSE_PROJECTION_MATRIX = $84E4;
  GL_TRANSPOSE_TEXTURE_MATRIX = $84E5;
  GL_TRANSPOSE_COLOR_MATRIX = $84E6;
  GL_MULTISAMPLE_BIT = $20000000;
  GL_NORMAL_MAP = $8511;
  GL_REFLECTION_MAP = $8512;
  GL_COMPRESSED_ALPHA = $84E9;
  GL_COMPRESSED_LUMINANCE = $84EA;
  GL_COMPRESSED_LUMINANCE_ALPHA = $84EB;
  GL_COMPRESSED_INTENSITY = $84EC;
  GL_COMBINE = $8570;
  GL_COMBINE_RGB = $8571;
  GL_COMBINE_ALPHA = $8572;
  GL_SOURCE0_RGB = $8580;
  GL_SOURCE1_RGB = $8581;
  GL_SOURCE2_RGB = $8582;
  GL_SOURCE0_ALPHA = $8588;
  GL_SOURCE1_ALPHA = $8589;
  GL_SOURCE2_ALPHA = $858A;
  GL_OPERAND0_RGB = $8590;
  GL_OPERAND1_RGB = $8591;
  GL_OPERAND2_RGB = $8592;
  GL_OPERAND0_ALPHA = $8598;
  GL_OPERAND1_ALPHA = $8599;
  GL_OPERAND2_ALPHA = $859A;
  GL_RGB_SCALE = $8573;
  GL_ADD_SIGNED = $8574;
  GL_INTERPOLATE = $8575;
  GL_SUBTRACT = $84E7;
  GL_CONSTANT = $8576;
  GL_PRIMARY_COLOR = $8577;
  GL_PREVIOUS = $8578;
  GL_DOT3_RGB = $86AE;
  GL_DOT3_RGBA = $86AF;
{$ENDIF}

  // GL_VERSION_1_4
  GL_BLEND_DST_RGB = $80C8;
  GL_BLEND_SRC_RGB = $80C9;
  GL_BLEND_DST_ALPHA = $80CA;
  GL_BLEND_SRC_ALPHA = $80CB;
  GL_POINT_FADE_THRESHOLD_SIZE = $8128;
  GL_DEPTH_COMPONENT16 = $81A5;
  GL_DEPTH_COMPONENT24 = $81A6;
  GL_DEPTH_COMPONENT32 = $81A7;
  GL_MIRRORED_REPEAT = $8370;
  GL_MAX_TEXTURE_LOD_BIAS = $84FD;
  GL_TEXTURE_LOD_BIAS = $8501;
  GL_INCR_WRAP = $8507;
  GL_DECR_WRAP = $8508;
  GL_TEXTURE_DEPTH_SIZE = $884A;
  GL_TEXTURE_COMPARE_MODE = $884C;
  GL_TEXTURE_COMPARE_FUNC = $884D;
{$IFDEF USE_DEPRECATED}
  GL_POINT_SIZE_MIN = $8126;
  GL_POINT_SIZE_MAX = $8127;
  GL_POINT_DISTANCE_ATTENUATION = $8129;
  GL_GENERATE_MIPMAP = $8191;
  GL_GENERATE_MIPMAP_HINT = $8192;
  GL_FOG_COORDINATE_SOURCE = $8450;
  GL_FOG_COORDINATE = $8451;
  GL_FRAGMENT_DEPTH = $8452;
  GL_CURRENT_FOG_COORDINATE = $8453;
  GL_FOG_COORDINATE_ARRAY_TYPE = $8454;
  GL_FOG_COORDINATE_ARRAY_STRIDE = $8455;
  GL_FOG_COORDINATE_ARRAY_POINTER = $8456;
  GL_FOG_COORDINATE_ARRAY = $8457;
  GL_COLOR_SUM = $8458;
  GL_CURRENT_SECONDARY_COLOR = $8459;
  GL_SECONDARY_COLOR_ARRAY_SIZE = $845A;
  GL_SECONDARY_COLOR_ARRAY_TYPE = $845B;
  GL_SECONDARY_COLOR_ARRAY_STRIDE = $845C;
  GL_SECONDARY_COLOR_ARRAY_POINTER = $845D;
  GL_SECONDARY_COLOR_ARRAY = $845E;
  GL_TEXTURE_FILTER_CONTROL = $8500;
  GL_DEPTH_TEXTURE_MODE = $884B;
  GL_COMPARE_R_TO_TEXTURE = $884E;
{$ENDIF}

  // GL_VERSION_1_5
  GL_BUFFER_SIZE = $8764;
  GL_BUFFER_USAGE = $8765;
  GL_QUERY_COUNTER_BITS = $8864;
  GL_CURRENT_QUERY = $8865;
  GL_QUERY_RESULT = $8866;
  GL_QUERY_RESULT_AVAILABLE = $8867;
  GL_ARRAY_BUFFER = $8892;
  GL_ELEMENT_ARRAY_BUFFER = $8893;
  GL_ARRAY_BUFFER_BINDING = $8894;
  GL_ELEMENT_ARRAY_BUFFER_BINDING = $8895;
  GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING = $889F;
  GL_READ_ONLY = $88B8;
  GL_WRITE_ONLY = $88B9;
  GL_READ_WRITE = $88BA;
  GL_BUFFER_ACCESS = $88BB;
  GL_BUFFER_MAPPED = $88BC;
  GL_BUFFER_MAP_POINTER = $88BD;
  GL_STREAM_DRAW = $88E0;
  GL_STREAM_READ = $88E1;
  GL_STREAM_COPY = $88E2;
  GL_STATIC_DRAW = $88E4;
  GL_STATIC_READ = $88E5;
  GL_STATIC_COPY = $88E6;
  GL_DYNAMIC_DRAW = $88E8;
  GL_DYNAMIC_READ = $88E9;
  GL_DYNAMIC_COPY = $88EA;
  GL_SAMPLES_PASSED = $8914;
{$IFDEF USE_DEPRECATED}
  GL_VERTEX_ARRAY_BUFFER_BINDING = $8896;
  GL_NORMAL_ARRAY_BUFFER_BINDING = $8897;
  GL_COLOR_ARRAY_BUFFER_BINDING = $8898;
  GL_INDEX_ARRAY_BUFFER_BINDING = $8899;
  GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING = $889A;
  GL_EDGE_FLAG_ARRAY_BUFFER_BINDING = $889B;
  GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING = $889C;
  GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING = $889D;
  GL_WEIGHT_ARRAY_BUFFER_BINDING = $889E;
  GL_FOG_COORD_SRC = $8450;
  GL_FOG_COORD = $8451;
  GL_CURRENT_FOG_COORD = $8453;
  GL_FOG_COORD_ARRAY_TYPE = $8454;
  GL_FOG_COORD_ARRAY_STRIDE = $8455;
  GL_FOG_COORD_ARRAY_POINTER = $8456;
  GL_FOG_COORD_ARRAY = $8457;
  GL_FOG_COORD_ARRAY_BUFFER_BINDING = $889D;
  GL_SRC0_RGB = $8580;
  GL_SRC1_RGB = $8581;
  GL_SRC2_RGB = $8582;
  GL_SRC0_ALPHA = $8588;
  GL_SRC1_ALPHA = $8589;
  GL_SRC2_ALPHA = $858A;
{$ENDIF}

  // GL_VERSION_2_0
  GL_BLEND_EQUATION_RGB = $8009;
  GL_VERTEX_ATTRIB_ARRAY_ENABLED = $8622;
  GL_VERTEX_ATTRIB_ARRAY_SIZE = $8623;
  GL_VERTEX_ATTRIB_ARRAY_STRIDE = $8624;
  GL_VERTEX_ATTRIB_ARRAY_TYPE = $8625;
  GL_CURRENT_VERTEX_ATTRIB = $8626;
  GL_VERTEX_PROGRAM_POINT_SIZE = $8642;
  GL_VERTEX_ATTRIB_ARRAY_POINTER = $8645;
  GL_STENCIL_BACK_FUNC = $8800;
  GL_STENCIL_BACK_FAIL = $8801;
  GL_STENCIL_BACK_PASS_DEPTH_FAIL = $8802;
  GL_STENCIL_BACK_PASS_DEPTH_PASS = $8803;
  GL_MAX_DRAW_BUFFERS = $8824;
  GL_DRAW_BUFFER0 = $8825;
  GL_DRAW_BUFFER1 = $8826;
  GL_DRAW_BUFFER2 = $8827;
  GL_DRAW_BUFFER3 = $8828;
  GL_DRAW_BUFFER4 = $8829;
  GL_DRAW_BUFFER5 = $882A;
  GL_DRAW_BUFFER6 = $882B;
  GL_DRAW_BUFFER7 = $882C;
  GL_DRAW_BUFFER8 = $882D;
  GL_DRAW_BUFFER9 = $882E;
  GL_DRAW_BUFFER10 = $882F;
  GL_DRAW_BUFFER11 = $8830;
  GL_DRAW_BUFFER12 = $8831;
  GL_DRAW_BUFFER13 = $8832;
  GL_DRAW_BUFFER14 = $8833;
  GL_DRAW_BUFFER15 = $8834;
  GL_BLEND_EQUATION_ALPHA = $883D;
  GL_MAX_VERTEX_ATTRIBS = $8869;
  GL_VERTEX_ATTRIB_ARRAY_NORMALIZED = $886A;
  GL_MAX_TEXTURE_IMAGE_UNITS = $8872;
  GL_FRAGMENT_SHADER = $8B30;
  GL_VERTEX_SHADER = $8B31;
  GL_MAX_FRAGMENT_UNIFORM_COMPONENTS = $8B49;
  GL_MAX_VERTEX_UNIFORM_COMPONENTS = $8B4A;
  GL_MAX_VARYING_FLOATS = $8B4B;
  GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS = $8B4C;
  GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS = $8B4D;
  GL_SHADER_TYPE = $8B4F;
  GL_FLOAT_VEC2 = $8B50;
  GL_FLOAT_VEC3 = $8B51;
  GL_FLOAT_VEC4 = $8B52;
  GL_INT_VEC2 = $8B53;
  GL_INT_VEC3 = $8B54;
  GL_INT_VEC4 = $8B55;
  GL_BOOL = $8B56;
  GL_BOOL_VEC2 = $8B57;
  GL_BOOL_VEC3 = $8B58;
  GL_BOOL_VEC4 = $8B59;
  GL_FLOAT_MAT2 = $8B5A;
  GL_FLOAT_MAT3 = $8B5B;
  GL_FLOAT_MAT4 = $8B5C;
  GL_SAMPLER_1D = $8B5D;
  GL_SAMPLER_2D = $8B5E;
  GL_SAMPLER_3D = $8B5F;
  GL_SAMPLER_CUBE = $8B60;
  GL_SAMPLER_1D_SHADOW = $8B61;
  GL_SAMPLER_2D_SHADOW = $8B62;
  GL_DELETE_STATUS = $8B80;
  GL_COMPILE_STATUS = $8B81;
  GL_LINK_STATUS = $8B82;
  GL_VALIDATE_STATUS = $8B83;
  GL_INFO_LOG_LENGTH = $8B84;
  GL_ATTACHED_SHADERS = $8B85;
  GL_ACTIVE_UNIFORMS = $8B86;
  GL_ACTIVE_UNIFORM_MAX_LENGTH = $8B87;
  GL_SHADER_SOURCE_LENGTH = $8B88;
  GL_ACTIVE_ATTRIBUTES = $8B89;
  GL_ACTIVE_ATTRIBUTE_MAX_LENGTH = $8B8A;
  GL_FRAGMENT_SHADER_DERIVATIVE_HINT = $8B8B;
  GL_SHADING_LANGUAGE_VERSION = $8B8C;
  GL_CURRENT_PROGRAM = $8B8D;
  GL_POINT_SPRITE_COORD_ORIGIN = $8CA0;
  GL_LOWER_LEFT = $8CA1;
  GL_UPPER_LEFT = $8CA2;
  GL_STENCIL_BACK_REF = $8CA3;
  GL_STENCIL_BACK_VALUE_MASK = $8CA4;
  GL_STENCIL_BACK_WRITEMASK = $8CA5;
{$IFDEF USE_DEPRECATED}
  GL_VERTEX_PROGRAM_TWO_SIDE = $8643;
  GL_POINT_SPRITE = $8861;
  GL_COORD_REPLACE = $8862;
  GL_MAX_TEXTURE_COORDS = $8871;
{$ENDIF}

  // GL_VERSION_2_1
  GL_PIXEL_PACK_BUFFER = $88EB;
  GL_PIXEL_UNPACK_BUFFER = $88EC;
  GL_PIXEL_PACK_BUFFER_BINDING = $88ED;
  GL_PIXEL_UNPACK_BUFFER_BINDING = $88EF;
  GL_FLOAT_MAT2x3 = $8B65;
  GL_FLOAT_MAT2x4 = $8B66;
  GL_FLOAT_MAT3x2 = $8B67;
  GL_FLOAT_MAT3x4 = $8B68;
  GL_FLOAT_MAT4x2 = $8B69;
  GL_FLOAT_MAT4x3 = $8B6A;
  GL_SRGB = $8C40;
  GL_SRGB8 = $8C41;
  GL_SRGB_ALPHA = $8C42;
  GL_SRGB8_ALPHA8 = $8C43;
  GL_COMPRESSED_SRGB = $8C48;
  GL_COMPRESSED_SRGB_ALPHA = $8C49;
{$IFDEF USE_DEPRECATED}
  GL_CURRENT_RASTER_SECONDARY_COLOR = $845F;
  GL_SLUMINANCE_ALPHA = $8C44;
  GL_SLUMINANCE8_ALPHA8 = $8C45;
  GL_SLUMINANCE = $8C46;
  GL_SLUMINANCE8 = $8C47;
  GL_COMPRESSED_SLUMINANCE = $8C4A;
  GL_COMPRESSED_SLUMINANCE_ALPHA = $8C4B;
{$ENDIF}

  // GL_VERSION_3_0
  GL_COMPARE_REF_TO_TEXTURE = $884E;
  GL_CLIP_DISTANCE0 = $3000;
  GL_CLIP_DISTANCE1 = $3001;
  GL_CLIP_DISTANCE2 = $3002;
  GL_CLIP_DISTANCE3 = $3003;
  GL_CLIP_DISTANCE4 = $3004;
  GL_CLIP_DISTANCE5 = $3005;
  GL_CLIP_DISTANCE6 = $3006;
  GL_CLIP_DISTANCE7 = $3007;
  GL_MAX_CLIP_DISTANCES = $0D32;
  GL_MAJOR_VERSION = $821B;
  GL_MINOR_VERSION = $821C;
  GL_NUM_EXTENSIONS = $821D;
  GL_CONTEXT_FLAGS = $821E;
  GL_DEPTH_BUFFER = $8223;
  GL_STENCIL_BUFFER = $8224;
  GL_COMPRESSED_RED = $8225;
  GL_COMPRESSED_RG = $8226;
  GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT = $0001;
  GL_RGBA32F = $8814;
  GL_RGB32F = $8815;
  GL_RGBA16F = $881A;
  GL_RGB16F = $881B;
  GL_VERTEX_ATTRIB_ARRAY_INTEGER = $88FD;
  GL_MAX_ARRAY_TEXTURE_LAYERS = $88FF;
  GL_MIN_PROGRAM_TEXEL_OFFSET = $8904;
  GL_MAX_PROGRAM_TEXEL_OFFSET = $8905;
  GL_CLAMP_READ_COLOR = $891C;
  GL_FIXED_ONLY = $891D;
  GL_MAX_VARYING_COMPONENTS = $8B4B;
  GL_TEXTURE_1D_ARRAY = $8C18;
  GL_PROXY_TEXTURE_1D_ARRAY = $8C19;
  GL_TEXTURE_2D_ARRAY = $8C1A;
  GL_PROXY_TEXTURE_2D_ARRAY = $8C1B;
  GL_TEXTURE_BINDING_1D_ARRAY = $8C1C;
  GL_TEXTURE_BINDING_2D_ARRAY = $8C1D;
  GL_R11F_G11F_B10F = $8C3A;
  GL_UNSIGNED_INT_10F_11F_11F_REV = $8C3B;
  GL_RGB9_E5 = $8C3D;
  GL_UNSIGNED_INT_5_9_9_9_REV = $8C3E;
  GL_TEXTURE_SHARED_SIZE = $8C3F;
  GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH = $8C76;
  GL_TRANSFORM_FEEDBACK_BUFFER_MODE = $8C7F;
  GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS = $8C80;
  GL_TRANSFORM_FEEDBACK_VARYINGS = $8C83;
  GL_TRANSFORM_FEEDBACK_BUFFER_START = $8C84;
  GL_TRANSFORM_FEEDBACK_BUFFER_SIZE = $8C85;
  GL_PRIMITIVES_GENERATED = $8C87;
  GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN = $8C88;
  GL_RASTERIZER_DISCARD = $8C89;
  GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS = $8C8A;
  GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS = $8C8B;
  GL_INTERLEAVED_ATTRIBS = $8C8C;
  GL_SEPARATE_ATTRIBS = $8C8D;
  GL_TRANSFORM_FEEDBACK_BUFFER = $8C8E;
  GL_TRANSFORM_FEEDBACK_BUFFER_BINDING = $8C8F;
  GL_RGBA32UI = $8D70;
  GL_RGB32UI = $8D71;
  GL_RGBA16UI = $8D76;
  GL_RGB16UI = $8D77;
  GL_RGBA8UI = $8D7C;
  GL_RGB8UI = $8D7D;
  GL_RGBA32I = $8D82;
  GL_RGB32I = $8D83;
  GL_RGBA16I = $8D88;
  GL_RGB16I = $8D89;
  GL_RGBA8I = $8D8E;
  GL_RGB8I = $8D8F;
  GL_RED_INTEGER = $8D94;
  GL_GREEN_INTEGER = $8D95;
  GL_BLUE_INTEGER = $8D96;
  GL_RGB_INTEGER = $8D98;
  GL_RGBA_INTEGER = $8D99;
  GL_BGR_INTEGER = $8D9A;
  GL_BGRA_INTEGER = $8D9B;
  GL_SAMPLER_1D_ARRAY = $8DC0;
  GL_SAMPLER_2D_ARRAY = $8DC1;
  GL_SAMPLER_1D_ARRAY_SHADOW = $8DC3;
  GL_SAMPLER_2D_ARRAY_SHADOW = $8DC4;
  GL_SAMPLER_CUBE_SHADOW = $8DC5;
  GL_UNSIGNED_INT_VEC2 = $8DC6;
  GL_UNSIGNED_INT_VEC3 = $8DC7;
  GL_UNSIGNED_INT_VEC4 = $8DC8;
  GL_INT_SAMPLER_1D = $8DC9;
  GL_INT_SAMPLER_2D = $8DCA;
  GL_INT_SAMPLER_3D = $8DCB;
  GL_INT_SAMPLER_CUBE = $8DCC;
  GL_INT_SAMPLER_1D_ARRAY = $8DCE;
  GL_INT_SAMPLER_2D_ARRAY = $8DCF;
  GL_UNSIGNED_INT_SAMPLER_1D = $8DD1;
  GL_UNSIGNED_INT_SAMPLER_2D = $8DD2;
  GL_UNSIGNED_INT_SAMPLER_3D = $8DD3;
  GL_UNSIGNED_INT_SAMPLER_CUBE = $8DD4;
  GL_UNSIGNED_INT_SAMPLER_1D_ARRAY = $8DD6;
  GL_UNSIGNED_INT_SAMPLER_2D_ARRAY = $8DD7;
  GL_QUERY_WAIT = $8E13;
  GL_QUERY_NO_WAIT = $8E14;
  GL_QUERY_BY_REGION_WAIT = $8E15;
  GL_QUERY_BY_REGION_NO_WAIT = $8E16;
  GL_BUFFER_ACCESS_FLAGS = $911F;
  GL_BUFFER_MAP_LENGTH = $9120;
  GL_BUFFER_MAP_OFFSET = $9121;
{$IFDEF USE_DEPRECATED}
  GL_CLAMP_VERTEX_COLOR = $891A;
  GL_CLAMP_FRAGMENT_COLOR = $891B;
  GL_ALPHA_INTEGER = $8D97;
{$ENDIF}

  // GL_VERSION_3_1
  GL_SAMPLER_2D_RECT = $8B63;
  GL_SAMPLER_2D_RECT_SHADOW = $8B64;
  GL_SAMPLER_BUFFER = $8DC2;
  GL_INT_SAMPLER_2D_RECT = $8DCD;
  GL_INT_SAMPLER_BUFFER = $8DD0;
  GL_UNSIGNED_INT_SAMPLER_2D_RECT = $8DD5;
  GL_UNSIGNED_INT_SAMPLER_BUFFER = $8DD8;
  GL_TEXTURE_BUFFER = $8C2A;
  GL_MAX_TEXTURE_BUFFER_SIZE = $8C2B;
  GL_TEXTURE_BINDING_BUFFER = $8C2C;
  GL_TEXTURE_BUFFER_DATA_STORE_BINDING = $8C2D;
  GL_TEXTURE_BUFFER_FORMAT = $8C2E;
  GL_TEXTURE_RECTANGLE = $84F5;
  GL_TEXTURE_BINDING_RECTANGLE = $84F6;
  GL_PROXY_TEXTURE_RECTANGLE = $84F7;
  GL_MAX_RECTANGLE_TEXTURE_SIZE = $84F8;
  GL_RED_SNORM = $8F90;
  GL_RG_SNORM = $8F91;
  GL_RGB_SNORM = $8F92;
  GL_RGBA_SNORM = $8F93;
  GL_R8_SNORM = $8F94;
  GL_RG8_SNORM = $8F95;
  GL_RGB8_SNORM = $8F96;
  GL_RGBA8_SNORM = $8F97;
  GL_R16_SNORM = $8F98;
  GL_RG16_SNORM = $8F99;
  GL_RGB16_SNORM = $8F9A;
  GL_RGBA16_SNORM = $8F9B;
  GL_SIGNED_NORMALIZED = $8F9C;
  GL_PRIMITIVE_RESTART = $8F9D;
  GL_PRIMITIVE_RESTART_INDEX = $8F9E;
  // GL_VERSION_3_2
  GL_CONTEXT_CORE_PROFILE_BIT = $00000001;
  GL_CONTEXT_COMPATIBILITY_PROFILE_BIT = $00000002;
  GL_LINES_ADJACENCY = $000A;
  GL_LINE_STRIP_ADJACENCY = $000B;
  GL_TRIANGLES_ADJACENCY = $000C;
  GL_TRIANGLE_STRIP_ADJACENCY = $000D;
  GL_PROGRAM_POINT_SIZE = $8642;
  GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS = $8C29;
  GL_FRAMEBUFFER_ATTACHMENT_LAYERED = $8DA7;
  GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS = $8DA8;
  GL_GEOMETRY_SHADER = $8DD9;
  GL_GEOMETRY_VERTICES_OUT = $8916;
  GL_GEOMETRY_INPUT_TYPE = $8917;
  GL_GEOMETRY_OUTPUT_TYPE = $8918;
  GL_MAX_GEOMETRY_UNIFORM_COMPONENTS = $8DDF;
  GL_MAX_GEOMETRY_OUTPUT_VERTICES = $8DE0;
  GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS = $8DE1;
  GL_MAX_VERTEX_OUTPUT_COMPONENTS = $9122;
  GL_MAX_GEOMETRY_INPUT_COMPONENTS = $9123;
  GL_MAX_GEOMETRY_OUTPUT_COMPONENTS = $9124;
  GL_MAX_FRAGMENT_INPUT_COMPONENTS = $9125;
  GL_CONTEXT_PROFILE_MASK = $9126;
  // GL_VERSION_3_3
  GL_VERTEX_ATTRIB_ARRAY_DIVISOR = $88FE;
  // GL_VERSION_4_0
  GL_SAMPLE_SHADING = $8C36;
  GL_MIN_SAMPLE_SHADING_VALUE = $8C37;
  GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET = $8E5E;
  GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET = $8E5F;
  GL_TEXTURE_CUBE_MAP_ARRAY = $9009;
  GL_TEXTURE_BINDING_CUBE_MAP_ARRAY = $900A;
  GL_PROXY_TEXTURE_CUBE_MAP_ARRAY = $900B;
  GL_SAMPLER_CUBE_MAP_ARRAY = $900C;
  GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW = $900D;
  GL_INT_SAMPLER_CUBE_MAP_ARRAY = $900E;
  GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY = $900F;

  // GL_VERSION_4_1
  // GL_VERSION_4_2
  // GL_VERSION_4_3
  GL_NUM_SHADING_LANGUAGE_VERSIONS  = $82E9;
  GL_VERTEX_ATTRIB_ARRAY_LONG = $874E;
  // GL_3DFX_multisample
  GL_MULTISAMPLE_3DFX = $86B2;
  GL_SAMPLE_BUFFERS_3DFX = $86B3;
  GL_SAMPLES_3DFX = $86B4;
  GL_MULTISAMPLE_BIT_3DFX = $20000000;

  // GL_3DFX_texture_compression_FXT1
  GL_COMPRESSED_RGB_FXT1_3DFX = $86B0;
  GL_COMPRESSED_RGBA_FXT1_3DFX = $86B1;

  // GL_APPLE_client_storage
  GL_UNPACK_CLIENT_STORAGE_APPLE = $85B2;

  // GL_APPLE_element_array
  GL_ELEMENT_ARRAY_APPLE = $8A0C;
  GL_ELEMENT_ARRAY_TYPE_APPLE = $8A0D;
  GL_ELEMENT_ARRAY_POINTER_APPLE = $8A0E;

  // GL_APPLE_fence
  GL_DRAW_PIXELS_APPLE = $8A0A;
  GL_FENCE_APPLE = $8A0B;

  // GL_APPLE_specular_vector
  GL_LIGHT_MODEL_SPECULAR_VECTOR_APPLE = $85B0;

  // GL_APPLE_transform_hint
  GL_TRANSFORM_HINT_APPLE = $85B1;

  // GL_APPLE_vertex_array_object
  GL_VERTEX_ARRAY_BINDING_APPLE = $85B5;

  // GL_APPLE_vertex_array_range
  GL_VERTEX_ARRAY_RANGE_APPLE = $851D;
  GL_VERTEX_ARRAY_RANGE_LENGTH_APPLE = $851E;
  GL_VERTEX_ARRAY_STORAGE_HINT_APPLE = $851F;
  GL_VERTEX_ARRAY_RANGE_POINTER_APPLE = $8521;
  GL_STORAGE_CLIENT_APPLE = $85B4;
  GL_STORAGE_CACHED_APPLE = $85BE;
  GL_STORAGE_SHARED_APPLE = $85BF;

  // GL_APPLE_ycbcr_422
  GL_YCBCR_422_APPLE = $85B9;
  GL_UNSIGNED_SHORT_8_8_APPLE = $85BA;
  GL_UNSIGNED_SHORT_8_8_REV_APPLE = $85BB;
  GL_RGB_RAW_422_APPLE = $8A51;

  // GL_APPLE_texture_range
  GL_TEXTURE_RANGE_LENGTH_APPLE = $85B7;
  GL_TEXTURE_RANGE_POINTER_APPLE = $85B8;
  GL_TEXTURE_STORAGE_HINT_APPLE = $85BC;
  GL_STORAGE_PRIVATE_APPLE = $85BD;
  { reuse GL_STORAGE_CACHED_APPLE }
  { reuse GL_STORAGE_SHARED_APPLE }

  // GL_APPLE_float_pixels
  GL_HALF_APPLE = $140B;
  GL_RGBA_FLOAT32_APPLE = $8814;
  GL_RGB_FLOAT32_APPLE = $8815;
  GL_ALPHA_FLOAT32_APPLE = $8816;
  GL_INTENSITY_FLOAT32_APPLE = $8817;
  GL_LUMINANCE_FLOAT32_APPLE = $8818;
  GL_LUMINANCE_ALPHA_FLOAT32_APPLE = $8819;
  GL_RGBA_FLOAT16_APPLE = $881A;
  GL_RGB_FLOAT16_APPLE = $881B;
  GL_ALPHA_FLOAT16_APPLE = $881C;
  GL_INTENSITY_FLOAT16_APPLE = $881D;
  GL_LUMINANCE_FLOAT16_APPLE = $881E;
  GL_LUMINANCE_ALPHA_FLOAT16_APPLE = $881F;
  GL_COLOR_FLOAT_APPLE = $8A0F;

  // GL_APPLE_vertex_program_evaluators
  GL_VERTEX_ATTRIB_MAP1_APPLE = $8A00;
  GL_VERTEX_ATTRIB_MAP2_APPLE = $8A01;
  GL_VERTEX_ATTRIB_MAP1_SIZE_APPLE = $8A02;
  GL_VERTEX_ATTRIB_MAP1_COEFF_APPLE = $8A03;
  GL_VERTEX_ATTRIB_MAP1_ORDER_APPLE = $8A04;
  GL_VERTEX_ATTRIB_MAP1_DOMAIN_APPLE = $8A05;
  GL_VERTEX_ATTRIB_MAP2_SIZE_APPLE = $8A06;
  GL_VERTEX_ATTRIB_MAP2_COEFF_APPLE = $8A07;
  GL_VERTEX_ATTRIB_MAP2_ORDER_APPLE = $8A08;
  GL_VERTEX_ATTRIB_MAP2_DOMAIN_APPLE = $8A09;

  // GL_APPLE_aux_depth_stencil
  GL_AUX_DEPTH_STENCIL_APPLE = $8A14;

  // GL_APPLE_object_purgeable
  GL_BUFFER_OBJECT_APPLE = $85B3;
  GL_RELEASED_APPLE = $8A19;
  GL_VOLATILE_APPLE = $8A1A;
  GL_RETAINED_APPLE = $8A1B;
  GL_UNDEFINED_APPLE = $8A1C;
  GL_PURGEABLE_APPLE = $8A1D;

  // GL_APPLE_row_bytes
  GL_PACK_ROW_BYTES_APPLE = $8A15;
  GL_UNPACK_ROW_BYTES_APPLE = $8A16;

  // GL_APPLE_rgb_422
  { reuse GL_UNSIGNED_SHORT_8_8_APPLE }
  { reuse GL_UNSIGNED_SHORT_8_8_REV_APPLE }

  // GL_ARB_depth_texture
  GL_DEPTH_COMPONENT16_ARB = $81A5;
  GL_DEPTH_COMPONENT24_ARB = $81A6;
  GL_DEPTH_COMPONENT32_ARB = $81A7;
  GL_TEXTURE_DEPTH_SIZE_ARB = $884A;
  GL_DEPTH_TEXTURE_MODE_ARB = $884B;

  // GL_ARB_fragment_program
  GL_FRAGMENT_PROGRAM_ARB = $8804;
  GL_PROGRAM_ALU_INSTRUCTIONS_ARB = $8805;
  GL_PROGRAM_TEX_INSTRUCTIONS_ARB = $8806;
  GL_PROGRAM_TEX_INDIRECTIONS_ARB = $8807;
  GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB = $8808;
  GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB = $8809;
  GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB = $880A;
  GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB = $880B;
  GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB = $880C;
  GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB = $880D;
  GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB = $880E;
  GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB = $880F;
  GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB = $8810;
  GL_MAX_TEXTURE_COORDS_ARB = $8871;
  GL_MAX_TEXTURE_IMAGE_UNITS_ARB = $8872;

  // GL_ARB_imaging
  GL_CONSTANT_COLOR_ARB = $8001;
  GL_ONE_MINUS_CONSTANT_COLOR = $8002;
  GL_CONSTANT_ALPHA = $8003;
  GL_ONE_MINUS_CONSTANT_ALPHA = $8004;
  GL_BLEND_COLOR = $8005;
  GL_FUNC_ADD = $8006;
  GL_MIN = $8007;
  GL_MAX = $8008;
  GL_BLEND_EQUATION = $8009;
  GL_FUNC_SUBTRACT = $800A;
  GL_FUNC_REVERSE_SUBTRACT = $800B;
{$IFDEF USE_DEPRECATED}
  GL_CONVOLUTION_1D = $8010;
  GL_CONVOLUTION_2D = $8011;
  GL_SEPARABLE_2D = $8012;
  GL_CONVOLUTION_BORDER_MODE = $8013;
  GL_CONVOLUTION_FILTER_SCALE = $8014;
  GL_CONVOLUTION_FILTER_BIAS = $8015;
  GL_REDUCE = $8016;
  GL_CONVOLUTION_FORMAT = $8017;
  GL_CONVOLUTION_WIDTH = $8018;
  GL_CONVOLUTION_HEIGHT = $8019;
  GL_MAX_CONVOLUTION_WIDTH = $801A;
  GL_MAX_CONVOLUTION_HEIGHT = $801B;
  GL_POST_CONVOLUTION_RED_SCALE = $801C;
  GL_POST_CONVOLUTION_GREEN_SCALE = $801D;
  GL_POST_CONVOLUTION_BLUE_SCALE = $801E;
  GL_POST_CONVOLUTION_ALPHA_SCALE = $801F;
  GL_POST_CONVOLUTION_RED_BIAS = $8020;
  GL_POST_CONVOLUTION_GREEN_BIAS = $8021;
  GL_POST_CONVOLUTION_BLUE_BIAS = $8022;
  GL_POST_CONVOLUTION_ALPHA_BIAS = $8023;
  GL_HISTOGRAM = $8024;
  GL_PROXY_HISTOGRAM = $8025;
  GL_HISTOGRAM_WIDTH = $8026;
  GL_HISTOGRAM_FORMAT = $8027;
  GL_HISTOGRAM_RED_SIZE = $8028;
  GL_HISTOGRAM_GREEN_SIZE = $8029;
  GL_HISTOGRAM_BLUE_SIZE = $802A;
  GL_HISTOGRAM_ALPHA_SIZE = $802B;
  GL_HISTOGRAM_LUMINANCE_SIZE = $802C;
  GL_HISTOGRAM_SINK = $802D;
  GL_MINMAX = $802E;
  GL_MINMAX_FORMAT = $802F;
  GL_MINMAX_SINK = $8030;
  GL_TABLE_TOO_LARGE = $8031;
  GL_COLOR_MATRIX = $80B1;
  GL_COLOR_MATRIX_STACK_DEPTH = $80B2;
  GL_MAX_COLOR_MATRIX_STACK_DEPTH = $80B3;
  GL_POST_COLOR_MATRIX_RED_SCALE = $80B4;
  GL_POST_COLOR_MATRIX_GREEN_SCALE = $80B5;
  GL_POST_COLOR_MATRIX_BLUE_SCALE = $80B6;
  GL_POST_COLOR_MATRIX_ALPHA_SCALE = $80B7;
  GL_POST_COLOR_MATRIX_RED_BIAS = $80B8;
  GL_POST_COLOR_MATRIX_GREEN_BIAS = $80B9;
  GL_POST_COLOR_MATRIX_BLUE_BIAS = $80BA;
  GL_POST_COLOR_MATRIX_ALPHA_BIAS = $80BB;
  GL_COLOR_TABLE = $80D0;
  GL_POST_CONVOLUTION_COLOR_TABLE = $80D1;
  GL_POST_COLOR_MATRIX_COLOR_TABLE = $80D2;
  GL_PROXY_COLOR_TABLE = $80D3;
  GL_PROXY_POST_CONVOLUTION_COLOR_TABLE = $80D4;
  GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE = $80D5;
  GL_COLOR_TABLE_SCALE = $80D6;
  GL_COLOR_TABLE_BIAS = $80D7;
  GL_COLOR_TABLE_FORMAT = $80D8;
  GL_COLOR_TABLE_WIDTH = $80D9;
  GL_COLOR_TABLE_RED_SIZE = $80DA;
  GL_COLOR_TABLE_GREEN_SIZE = $80DB;
  GL_COLOR_TABLE_BLUE_SIZE = $80DC;
  GL_COLOR_TABLE_ALPHA_SIZE = $80DD;
  GL_COLOR_TABLE_LUMINANCE_SIZE = $80DE;
  GL_COLOR_TABLE_INTENSITY_SIZE = $80DF;
  GL_CONSTANT_BORDER = $8151;
  GL_REPLICATE_BORDER = $8153;
  GL_CONVOLUTION_BORDER_COLOR = $8154;
{$ENDIF}

  // GL_ARB_matrix_palette
  GL_MATRIX_PALETTE_ARB = $8840;
  GL_MAX_MATRIX_PALETTE_STACK_DEPTH_ARB = $8841;
  GL_MAX_PALETTE_MATRICES_ARB = $8842;
  GL_CURRENT_PALETTE_MATRIX_ARB = $8843;
  GL_MATRIX_INDEX_ARRAY_ARB = $8844;
  GL_CURRENT_MATRIX_INDEX_ARB = $8845;
  GL_MATRIX_INDEX_ARRAY_SIZE_ARB = $8846;
  GL_MATRIX_INDEX_ARRAY_TYPE_ARB = $8847;
  GL_MATRIX_INDEX_ARRAY_STRIDE_ARB = $8848;
  GL_MATRIX_INDEX_ARRAY_POINTER_ARB = $8849;

  // GL_ARB_multisample
  GL_MULTISAMPLE_ARB = $809D;
  GL_SAMPLE_ALPHA_TO_COVERAGE_ARB = $809E;
  GL_SAMPLE_ALPHA_TO_ONE_ARB = $809F;
  GL_SAMPLE_COVERAGE_ARB = $80A0;
  GL_SAMPLE_BUFFERS_ARB = $80A8;
  GL_SAMPLES_ARB = $80A9;
  GL_SAMPLE_COVERAGE_VALUE_ARB = $80AA;
  GL_SAMPLE_COVERAGE_INVERT_ARB = $80AB;
  GL_MULTISAMPLE_BIT_ARB = $20000000;

  // GL_ARB_multitexture
  GL_TEXTURE0_ARB = $84C0;
  GL_TEXTURE1_ARB = $84C1;
  GL_TEXTURE2_ARB = $84C2;
  GL_TEXTURE3_ARB = $84C3;
  GL_TEXTURE4_ARB = $84C4;
  GL_TEXTURE5_ARB = $84C5;
  GL_TEXTURE6_ARB = $84C6;
  GL_TEXTURE7_ARB = $84C7;
  GL_TEXTURE8_ARB = $84C8;
  GL_TEXTURE9_ARB = $84C9;
  GL_TEXTURE10_ARB = $84CA;
  GL_TEXTURE11_ARB = $84CB;
  GL_TEXTURE12_ARB = $84CC;
  GL_TEXTURE13_ARB = $84CD;
  GL_TEXTURE14_ARB = $84CE;
  GL_TEXTURE15_ARB = $84CF;
  GL_TEXTURE16_ARB = $84D0;
  GL_TEXTURE17_ARB = $84D1;
  GL_TEXTURE18_ARB = $84D2;
  GL_TEXTURE19_ARB = $84D3;
  GL_TEXTURE20_ARB = $84D4;
  GL_TEXTURE21_ARB = $84D5;
  GL_TEXTURE22_ARB = $84D6;
  GL_TEXTURE23_ARB = $84D7;
  GL_TEXTURE24_ARB = $84D8;
  GL_TEXTURE25_ARB = $84D9;
  GL_TEXTURE26_ARB = $84DA;
  GL_TEXTURE27_ARB = $84DB;
  GL_TEXTURE28_ARB = $84DC;
  GL_TEXTURE29_ARB = $84DD;
  GL_TEXTURE30_ARB = $84DE;
  GL_TEXTURE31_ARB = $84DF;
  GL_ACTIVE_TEXTURE_ARB = $84E0;
  GL_CLIENT_ACTIVE_TEXTURE_ARB = $84E1;
  GL_MAX_TEXTURE_UNITS_ARB = $84E2;

  // GL_ARB_point_parameters
  GL_POINT_SIZE_MIN_ARB = $8126;
  GL_POINT_SIZE_MAX_ARB = $8127;
  GL_POINT_FADE_THRESHOLD_SIZE_ARB = $8128;
  GL_POINT_DISTANCE_ATTENUATION_ARB = $8129;

  // GL_ARB_shadow
  GL_TEXTURE_COMPARE_MODE_ARB = $884C;
  GL_TEXTURE_COMPARE_FUNC_ARB = $884D;
  GL_COMPARE_R_TO_TEXTURE_ARB = $884E;

  // GL_ARB_shadow_ambient
  GL_TEXTURE_COMPARE_FAIL_VALUE_ARB = $80BF;

  // GL_ARB_sparse_buffer
  GL_SPARSE_STORAGE_BIT_ARB = $0400;
  GL_SPARSE_BUFFER_PAGE_SIZE_ARB = $82F8;

  // GL_ARB_texture_border_clamp
  GL_CLAMP_TO_BORDER_ARB = $812D;

  // GL_ARB_texture_compression
  GL_COMPRESSED_ALPHA_ARB = $84E9;
  GL_COMPRESSED_LUMINANCE_ARB = $84EA;
  GL_COMPRESSED_LUMINANCE_ALPHA_ARB = $84EB;
  GL_COMPRESSED_INTENSITY_ARB = $84EC;
  GL_COMPRESSED_RGB_ARB = $84ED;
  GL_COMPRESSED_RGBA_ARB = $84EE;
  GL_TEXTURE_COMPRESSION_HINT_ARB = $84EF;
  GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB = $86A0;
  GL_TEXTURE_COMPRESSED_ARB = $86A1;
  GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB = $86A2;
  GL_COMPRESSED_TEXTURE_FORMATS_ARB = $86A3;

  // GL_ARB_texture_cube_map
  GL_NORMAL_MAP_ARB = $8511;
  GL_REFLECTION_MAP_ARB = $8512;
  GL_TEXTURE_CUBE_MAP_ARB = $8513;
  GL_TEXTURE_BINDING_CUBE_MAP_ARB = $8514;
  GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB = $8515;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB = $8516;
  GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB = $8517;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB = $8518;
  GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB = $8519;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB = $851A;
  GL_PROXY_TEXTURE_CUBE_MAP_ARB = $851B;
  GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB = $851C;

  // GL_ARB_texture_env_combine
  GL_COMBINE_ARB = $8570;
  GL_COMBINE_RGB_ARB = $8571;
  GL_COMBINE_ALPHA_ARB = $8572;
  GL_SOURCE0_RGB_ARB = $8580;
  GL_SOURCE1_RGB_ARB = $8581;
  GL_SOURCE2_RGB_ARB = $8582;
  GL_SOURCE0_ALPHA_ARB = $8588;
  GL_SOURCE1_ALPHA_ARB = $8589;
  GL_SOURCE2_ALPHA_ARB = $858A;
  GL_OPERAND0_RGB_ARB = $8590;
  GL_OPERAND1_RGB_ARB = $8591;
  GL_OPERAND2_RGB_ARB = $8592;
  GL_OPERAND0_ALPHA_ARB = $8598;
  GL_OPERAND1_ALPHA_ARB = $8599;
  GL_OPERAND2_ALPHA_ARB = $859A;
  GL_RGB_SCALE_ARB = $8573;
  GL_ADD_SIGNED_ARB = $8574;
  GL_INTERPOLATE_ARB = $8575;
  GL_SUBTRACT_ARB = $84E7;
  GL_CONSTANT_ARB = $8576;
  GL_PRIMARY_COLOR_ARB = $8577;
  GL_PREVIOUS_ARB = $8578;

  // GL_ARB_texture_env_dot3
  GL_DOT3_RGB_ARB = $86AE;
  GL_DOT3_RGBA_ARB = $86AF;

  // GL_ARB_texture_filter_minmax
  GL_TEXTURE_REDUCTION_MODE_ARB = $9366;
  GL_WEIGHTED_AVERAGE_ARB = $9367;

  // GL_ARB_texture_mirrored_repeat
  GL_MIRRORED_REPEAT_ARB = $8370;

  // GL_ARB_transpose_matrix
  GL_TRANSPOSE_MODELVIEW_MATRIX_ARB = $84E3;
  GL_TRANSPOSE_PROJECTION_MATRIX_ARB = $84E4;
  GL_TRANSPOSE_TEXTURE_MATRIX_ARB = $84E5;
  GL_TRANSPOSE_COLOR_MATRIX_ARB = $84E6;

  // GL_ARB_vertex_blend
  GL_MAX_VERTEX_UNITS_ARB = $86A4;
  GL_ACTIVE_VERTEX_UNITS_ARB = $86A5;
  GL_WEIGHT_SUM_UNITY_ARB = $86A6;
  GL_VERTEX_BLEND_ARB = $86A7;
  GL_CURRENT_WEIGHT_ARB = $86A8;
  GL_WEIGHT_ARRAY_TYPE_ARB = $86A9;
  GL_WEIGHT_ARRAY_STRIDE_ARB = $86AA;
  GL_WEIGHT_ARRAY_SIZE_ARB = $86AB;
  GL_WEIGHT_ARRAY_POINTER_ARB = $86AC;
  GL_WEIGHT_ARRAY_ARB = $86AD;
  GL_MODELVIEW0_ARB = $1700;
  GL_MODELVIEW1_ARB = $850A;
  GL_MODELVIEW2_ARB = $8722;
  GL_MODELVIEW3_ARB = $8723;
  GL_MODELVIEW4_ARB = $8724;
  GL_MODELVIEW5_ARB = $8725;
  GL_MODELVIEW6_ARB = $8726;
  GL_MODELVIEW7_ARB = $8727;
  GL_MODELVIEW8_ARB = $8728;
  GL_MODELVIEW9_ARB = $8729;
  GL_MODELVIEW10_ARB = $872A;
  GL_MODELVIEW11_ARB = $872B;
  GL_MODELVIEW12_ARB = $872C;
  GL_MODELVIEW13_ARB = $872D;
  GL_MODELVIEW14_ARB = $872E;
  GL_MODELVIEW15_ARB = $872F;
  GL_MODELVIEW16_ARB = $8730;
  GL_MODELVIEW17_ARB = $8731;
  GL_MODELVIEW18_ARB = $8732;
  GL_MODELVIEW19_ARB = $8733;
  GL_MODELVIEW20_ARB = $8734;
  GL_MODELVIEW21_ARB = $8735;
  GL_MODELVIEW22_ARB = $8736;
  GL_MODELVIEW23_ARB = $8737;
  GL_MODELVIEW24_ARB = $8738;
  GL_MODELVIEW25_ARB = $8739;
  GL_MODELVIEW26_ARB = $873A;
  GL_MODELVIEW27_ARB = $873B;
  GL_MODELVIEW28_ARB = $873C;
  GL_MODELVIEW29_ARB = $873D;
  GL_MODELVIEW30_ARB = $873E;
  GL_MODELVIEW31_ARB = $873F;

  // GL_ARB_vertex_buffer_object
  GL_BUFFER_SIZE_ARB = $8764;
  GL_BUFFER_USAGE_ARB = $8765;
  GL_ARRAY_BUFFER_ARB = $8892;
  GL_ELEMENT_ARRAY_BUFFER_ARB = $8893;
  GL_ARRAY_BUFFER_BINDING_ARB = $8894;
  GL_ELEMENT_ARRAY_BUFFER_BINDING_ARB = $8895;
  GL_VERTEX_ARRAY_BUFFER_BINDING_ARB = $8896;
  GL_NORMAL_ARRAY_BUFFER_BINDING_ARB = $8897;
  GL_COLOR_ARRAY_BUFFER_BINDING_ARB = $8898;
  GL_INDEX_ARRAY_BUFFER_BINDING_ARB = $8899;
  GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING_ARB = $889A;
  GL_EDGE_FLAG_ARRAY_BUFFER_BINDING_ARB = $889B;
  GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING_ARB = $889C;
  GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING_ARB = $889D;
  GL_WEIGHT_ARRAY_BUFFER_BINDING_ARB = $889E;
  GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ARB = $889F;
  GL_READ_ONLY_ARB = $88B8;
  GL_WRITE_ONLY_ARB = $88B9;
  GL_READ_WRITE_ARB = $88BA;
  GL_BUFFER_ACCESS_ARB = $88BB;
  GL_BUFFER_MAPPED_ARB = $88BC;
  GL_BUFFER_MAP_POINTER_ARB = $88BD;
  GL_STREAM_DRAW_ARB = $88E0;
  GL_STREAM_READ_ARB = $88E1;
  GL_STREAM_COPY_ARB = $88E2;
  GL_STATIC_DRAW_ARB = $88E4;
  GL_STATIC_READ_ARB = $88E5;
  GL_STATIC_COPY_ARB = $88E6;
  GL_DYNAMIC_DRAW_ARB = $88E8;
  GL_DYNAMIC_READ_ARB = $88E9;
  GL_DYNAMIC_COPY_ARB = $88EA;

  // GL_ARB_vertex_program
  GL_COLOR_SUM_ARB = $8458;
  GL_VERTEX_PROGRAM_ARB = $8620;
  GL_VERTEX_ATTRIB_ARRAY_ENABLED_ARB = $8622;
  GL_VERTEX_ATTRIB_ARRAY_SIZE_ARB = $8623;
  GL_VERTEX_ATTRIB_ARRAY_STRIDE_ARB = $8624;
  GL_VERTEX_ATTRIB_ARRAY_TYPE_ARB = $8625;
  GL_CURRENT_VERTEX_ATTRIB_ARB = $8626;
  GL_PROGRAM_LENGTH_ARB = $8627;
  GL_PROGRAM_STRING_ARB = $8628;
  GL_MAX_PROGRAM_MATRIX_STACK_DEPTH_ARB = $862E;
  GL_MAX_PROGRAM_MATRICES_ARB = $862F;
  GL_CURRENT_MATRIX_STACK_DEPTH_ARB = $8640;
  GL_CURRENT_MATRIX_ARB = $8641;
  GL_VERTEX_PROGRAM_POINT_SIZE_ARB = $8642;
  GL_VERTEX_PROGRAM_TWO_SIDE_ARB = $8643;
  GL_VERTEX_ATTRIB_ARRAY_POINTER_ARB = $8645;
  GL_PROGRAM_ERROR_POSITION_ARB = $864B;
  GL_PROGRAM_BINDING_ARB = $8677;
  GL_MAX_VERTEX_ATTRIBS_ARB = $8869;
  GL_VERTEX_ATTRIB_ARRAY_NORMALIZED_ARB = $886A;
  GL_PROGRAM_ERROR_STRING_ARB = $8874;
  GL_PROGRAM_FORMAT_ASCII_ARB = $8875;
  GL_PROGRAM_FORMAT_ARB = $8876;
  GL_PROGRAM_INSTRUCTIONS_ARB = $88A0;
  GL_MAX_PROGRAM_INSTRUCTIONS_ARB = $88A1;
  GL_PROGRAM_NATIVE_INSTRUCTIONS_ARB = $88A2;
  GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB = $88A3;
  GL_PROGRAM_TEMPORARIES_ARB = $88A4;
  GL_MAX_PROGRAM_TEMPORARIES_ARB = $88A5;
  GL_PROGRAM_NATIVE_TEMPORARIES_ARB = $88A6;
  GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB = $88A7;
  GL_PROGRAM_PARAMETERS_ARB = $88A8;
  GL_MAX_PROGRAM_PARAMETERS_ARB = $88A9;
  GL_PROGRAM_NATIVE_PARAMETERS_ARB = $88AA;
  GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB = $88AB;
  GL_PROGRAM_ATTRIBS_ARB = $88AC;
  GL_MAX_PROGRAM_ATTRIBS_ARB = $88AD;
  GL_PROGRAM_NATIVE_ATTRIBS_ARB = $88AE;
  GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB = $88AF;
  GL_PROGRAM_ADDRESS_REGISTERS_ARB = $88B0;
  GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB = $88B1;
  GL_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB = $88B2;
  GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB = $88B3;
  GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB = $88B4;
  GL_MAX_PROGRAM_ENV_PARAMETERS_ARB = $88B5;
  GL_PROGRAM_UNDER_NATIVE_LIMITS_ARB = $88B6;
  GL_TRANSPOSE_CURRENT_MATRIX_ARB = $88B7;
  GL_MATRIX0_ARB = $88C0;
  GL_MATRIX1_ARB = $88C1;
  GL_MATRIX2_ARB = $88C2;
  GL_MATRIX3_ARB = $88C3;
  GL_MATRIX4_ARB = $88C4;
  GL_MATRIX5_ARB = $88C5;
  GL_MATRIX6_ARB = $88C6;
  GL_MATRIX7_ARB = $88C7;
  GL_MATRIX8_ARB = $88C8;
  GL_MATRIX9_ARB = $88C9;
  GL_MATRIX10_ARB = $88CA;
  GL_MATRIX11_ARB = $88CB;
  GL_MATRIX12_ARB = $88CC;
  GL_MATRIX13_ARB = $88CD;
  GL_MATRIX14_ARB = $88CE;
  GL_MATRIX15_ARB = $88CF;
  GL_MATRIX16_ARB = $88D0;
  GL_MATRIX17_ARB = $88D1;
  GL_MATRIX18_ARB = $88D2;
  GL_MATRIX19_ARB = $88D3;
  GL_MATRIX20_ARB = $88D4;
  GL_MATRIX21_ARB = $88D5;
  GL_MATRIX22_ARB = $88D6;
  GL_MATRIX23_ARB = $88D7;
  GL_MATRIX24_ARB = $88D8;
  GL_MATRIX25_ARB = $88D9;
  GL_MATRIX26_ARB = $88DA;
  GL_MATRIX27_ARB = $88DB;
  GL_MATRIX28_ARB = $88DC;
  GL_MATRIX29_ARB = $88DD;
  GL_MATRIX30_ARB = $88DE;
  GL_MATRIX31_ARB = $88DF;

  // GL_ARB_draw_buffers
  GL_MAX_DRAW_BUFFERS_ARB = $8824;
  GL_DRAW_BUFFER0_ARB = $8825;
  GL_DRAW_BUFFER1_ARB = $8826;
  GL_DRAW_BUFFER2_ARB = $8827;
  GL_DRAW_BUFFER3_ARB = $8828;
  GL_DRAW_BUFFER4_ARB = $8829;
  GL_DRAW_BUFFER5_ARB = $882A;
  GL_DRAW_BUFFER6_ARB = $882B;
  GL_DRAW_BUFFER7_ARB = $882C;
  GL_DRAW_BUFFER8_ARB = $882D;
  GL_DRAW_BUFFER9_ARB = $882E;
  GL_DRAW_BUFFER10_ARB = $882F;
  GL_DRAW_BUFFER11_ARB = $8830;
  GL_DRAW_BUFFER12_ARB = $8831;
  GL_DRAW_BUFFER13_ARB = $8832;
  GL_DRAW_BUFFER14_ARB = $8833;
  GL_DRAW_BUFFER15_ARB = $8834;

  // GL_ARB_texture_rectangle
  GL_TEXTURE_RECTANGLE_ARB = $84F5;
  GL_TEXTURE_BINDING_RECTANGLE_ARB = $84F6;
  GL_PROXY_TEXTURE_RECTANGLE_ARB = $84F7;
  GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB = $84F8;

  // GL_ARB_color_buffer_float
  GL_RGBA_FLOAT_MODE_ARB = $8820;
  GL_CLAMP_VERTEX_COLOR_ARB = $891A;
  GL_CLAMP_FRAGMENT_COLOR_ARB = $891B;
  GL_CLAMP_READ_COLOR_ARB = $891C;
  GL_FIXED_ONLY_ARB = $891D;
  WGL_TYPE_RGBA_FLOAT_ARB = $21A0;
  GLX_RGBA_FLOAT_TYPE = $20B9;
  GLX_RGBA_FLOAT_BIT = $00000004;

  // GL_ARB_compute_variable_group_size
  GL_MAX_COMPUTE_VARIABLE_GROUP_INVOCATIONS_ARB = $9344;
  GL_MAX_COMPUTE_FIXED_GROUP_INVOCATIONS_ARB = $90EB;
  GL_MAX_COMPUTE_VARIABLE_GROUP_SIZE_ARB = $9345;
  GL_MAX_COMPUTE_FIXED_GROUP_SIZE_ARB = $91BF;

  // GL_ARB_half_float_pixel
  GL_HALF_FLOAT_ARB = $140B;

  // GL_ARB_texture_float
  GL_TEXTURE_RED_TYPE_ARB = $8C10;
  GL_TEXTURE_GREEN_TYPE_ARB = $8C11;
  GL_TEXTURE_BLUE_TYPE_ARB = $8C12;
  GL_TEXTURE_ALPHA_TYPE_ARB = $8C13;
  GL_TEXTURE_LUMINANCE_TYPE_ARB = $8C14;
  GL_TEXTURE_INTENSITY_TYPE_ARB = $8C15;
  GL_TEXTURE_DEPTH_TYPE_ARB = $8C16;
  GL_UNSIGNED_NORMALIZED_ARB = $8C17;
  GL_RGBA32F_ARB = $8814;
  GL_RGB32F_ARB = $8815;
  GL_ALPHA32F_ARB = $8816;
  GL_INTENSITY32F_ARB = $8817;
  GL_LUMINANCE32F_ARB = $8818;
  GL_LUMINANCE_ALPHA32F_ARB = $8819;
  GL_RGBA16F_ARB = $881A;
  GL_RGB16F_ARB = $881B;
  GL_ALPHA16F_ARB = $881C;
  GL_INTENSITY16F_ARB = $881D;
  GL_LUMINANCE16F_ARB = $881E;
  GL_LUMINANCE_ALPHA16F_ARB = $881F;

  // GL_ARB_pixel_buffer_object
  GL_PIXEL_PACK_BUFFER_ARB = $88EB;
  GL_PIXEL_UNPACK_BUFFER_ARB = $88EC;
  GL_PIXEL_PACK_BUFFER_BINDING_ARB = $88ED;
  GL_PIXEL_UNPACK_BUFFER_BINDING_ARB = $88EF;

  // GL_ARB_depth_buffer_float
  GL_DEPTH_COMPONENT32F = $8CAC;
  GL_DEPTH32F_STENCIL8 = $8CAD;
  GL_FLOAT_32_UNSIGNED_INT_24_8_REV = $8DAD;

  // GL_ARB_framebuffer_object
  GL_INVALID_FRAMEBUFFER_OPERATION = $0506;
  GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING = $8210;
  GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE = $8211;
  GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE = $8212;
  GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE = $8213;
  GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE = $8214;
  GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE = $8215;
  GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE = $8216;
  GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE = $8217;
  GL_FRAMEBUFFER_DEFAULT = $8218;
  GL_FRAMEBUFFER_UNDEFINED = $8219;
  GL_DEPTH_STENCIL_ATTACHMENT = $821A;
  GL_MAX_RENDERBUFFER_SIZE = $84E8;
  GL_DEPTH_STENCIL = $84F9;
  GL_UNSIGNED_INT_24_8 = $84FA;
  GL_DEPTH24_STENCIL8 = $88F0;
  GL_TEXTURE_STENCIL_SIZE = $88F1;
  GL_TEXTURE_RED_TYPE = $8C10;
  GL_TEXTURE_GREEN_TYPE = $8C11;
  GL_TEXTURE_BLUE_TYPE = $8C12;
  GL_TEXTURE_ALPHA_TYPE = $8C13;
  GL_TEXTURE_DEPTH_TYPE = $8C16;
  GL_UNSIGNED_NORMALIZED = $8C17;
  GL_FRAMEBUFFER_BINDING = $8CA6;
  GL_DRAW_FRAMEBUFFER_BINDING = GL_FRAMEBUFFER_BINDING;
  GL_RENDERBUFFER_BINDING = $8CA7;
  GL_READ_FRAMEBUFFER = $8CA8;
  GL_DRAW_FRAMEBUFFER = $8CA9;
  GL_READ_FRAMEBUFFER_BINDING = $8CAA;
  GL_RENDERBUFFER_SAMPLES = $8CAB;
  GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE = $8CD0;
  GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME = $8CD1;
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL = $8CD2;
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE = $8CD3;
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER = $8CD4;
  GL_FRAMEBUFFER_COMPLETE = $8CD5;
  GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT = $8CD6;
  GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT = $8CD7;
  GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER = $8CDB;
  GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER = $8CDC;
  GL_FRAMEBUFFER_UNSUPPORTED = $8CDD;
  GL_MAX_COLOR_ATTACHMENTS = $8CDF;
  GL_COLOR_ATTACHMENT0 = $8CE0;
  GL_COLOR_ATTACHMENT1 = $8CE1;
  GL_COLOR_ATTACHMENT2 = $8CE2;
  GL_COLOR_ATTACHMENT3 = $8CE3;
  GL_COLOR_ATTACHMENT4 = $8CE4;
  GL_COLOR_ATTACHMENT5 = $8CE5;
  GL_COLOR_ATTACHMENT6 = $8CE6;
  GL_COLOR_ATTACHMENT7 = $8CE7;
  GL_COLOR_ATTACHMENT8 = $8CE8;
  GL_COLOR_ATTACHMENT9 = $8CE9;
  GL_COLOR_ATTACHMENT10 = $8CEA;
  GL_COLOR_ATTACHMENT11 = $8CEB;
  GL_COLOR_ATTACHMENT12 = $8CEC;
  GL_COLOR_ATTACHMENT13 = $8CED;
  GL_COLOR_ATTACHMENT14 = $8CEE;
  GL_COLOR_ATTACHMENT15 = $8CEF;
  GL_DEPTH_ATTACHMENT = $8D00;
  GL_STENCIL_ATTACHMENT = $8D20;
  GL_FRAMEBUFFER = $8D40;
  GL_RENDERBUFFER = $8D41;
  GL_RENDERBUFFER_WIDTH = $8D42;
  GL_RENDERBUFFER_HEIGHT = $8D43;
  GL_RENDERBUFFER_INTERNAL_FORMAT = $8D44;
  GL_STENCIL_INDEX1 = $8D46;
  GL_STENCIL_INDEX4 = $8D47;
  GL_STENCIL_INDEX8 = $8D48;
  GL_STENCIL_INDEX16 = $8D49;
  GL_RENDERBUFFER_RED_SIZE = $8D50;
  GL_RENDERBUFFER_GREEN_SIZE = $8D51;
  GL_RENDERBUFFER_BLUE_SIZE = $8D52;
  GL_RENDERBUFFER_ALPHA_SIZE = $8D53;
  GL_RENDERBUFFER_DEPTH_SIZE = $8D54;
  GL_RENDERBUFFER_STENCIL_SIZE = $8D55;
  GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE = $8D56;
  GL_MAX_SAMPLES = $8D57;
{$IFDEF USE_DEPRECATED}
  GL_INDEX = $8222;
  GL_TEXTURE_LUMINANCE_TYPE = $8C14;
  GL_TEXTURE_INTENSITY_TYPE = $8C15;
{$ENDIF}

  // GL_ARB_framebuffer_sRGB
  GL_FRAMEBUFFER_SRGB = $8DB9;

  // GL_ARB_geometry_shader4
  GL_LINES_ADJACENCY_ARB = $000A;
  GL_LINE_STRIP_ADJACENCY_ARB = $000B;
  GL_TRIANGLES_ADJACENCY_ARB = $000C;
  GL_TRIANGLE_STRIP_ADJACENCY_ARB = $000D;
  GL_PROGRAM_POINT_SIZE_ARB = $8642;
  GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_ARB = $8C29;
  GL_FRAMEBUFFER_ATTACHMENT_LAYERED_ARB = $8DA7;
  GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_ARB = $8DA8;
  GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_ARB = $8DA9;
  GL_GEOMETRY_SHADER_ARB = $8DD9;
  GL_GEOMETRY_VERTICES_OUT_ARB = $8DDA;
  GL_GEOMETRY_INPUT_TYPE_ARB = $8DDB;
  GL_GEOMETRY_OUTPUT_TYPE_ARB = $8DDC;
  GL_MAX_GEOMETRY_VARYING_COMPONENTS_ARB = $8DDD;
  GL_MAX_VERTEX_VARYING_COMPONENTS_ARB = $8DDE;
  GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_ARB = $8DDF;
  GL_MAX_GEOMETRY_OUTPUT_VERTICES_ARB = $8DE0;
  GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_ARB = $8DE1;

  // GL_ARB_gl_spirv
  GL_SHADER_BINARY_FORMAT_SPIR_V_ARB = $9551;
  GL_SPIR_V_BINARY_ARB = $9552;

  // GL_ARB_half_float_vertex
  GL_HALF_FLOAT = $140B;

  // GL_ARB_instanced_arrays
  GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB = $88FE;

  // GL_ARB_map_buffer_range
  GL_MAP_READ_BIT = $0001;
  GL_MAP_WRITE_BIT = $0002;
  GL_MAP_INVALIDATE_RANGE_BIT = $0004;
  GL_MAP_INVALIDATE_BUFFER_BIT = $0008;
  GL_MAP_FLUSH_EXPLICIT_BIT = $0010;
  GL_MAP_UNSYNCHRONIZED_BIT = $0020;

  // GL_ARB_texture_buffer_object
  GL_TEXTURE_BUFFER_ARB = $8C2A;
  GL_MAX_TEXTURE_BUFFER_SIZE_ARB = $8C2B;
  GL_TEXTURE_BINDING_BUFFER_ARB = $8C2C;
  GL_TEXTURE_BUFFER_DATA_STORE_BINDING_ARB = $8C2D;
  GL_TEXTURE_BUFFER_FORMAT_ARB = $8C2E;

  // GL_ARB_texture_compression_rgtc
  GL_COMPRESSED_RED_RGTC1 = $8DBB;
  GL_COMPRESSED_SIGNED_RED_RGTC1 = $8DBC;
  GL_COMPRESSED_RG_RGTC2 = $8DBD;
  GL_COMPRESSED_SIGNED_RG_RGTC2 = $8DBE;

  // GL_ARB_texture_rg
  GL_RG = $8227;
  GL_RG_INTEGER = $8228;
  GL_R8 = $8229;
  GL_R16 = $822A;
  GL_RG8 = $822B;
  GL_RG16 = $822C;
  GL_R16F = $822D;
  GL_R32F = $822E;
  GL_RG16F = $822F;
  GL_RG32F = $8230;
  GL_R8I = $8231;
  GL_R8UI = $8232;
  GL_R16I = $8233;
  GL_R16UI = $8234;
  GL_R32I = $8235;
  GL_R32UI = $8236;
  GL_RG8I = $8237;
  GL_RG8UI = $8238;
  GL_RG16I = $8239;
  GL_RG16UI = $823A;
  GL_RG32I = $823B;
  GL_RG32UI = $823C;

  // GL_ARB_vertex_array_object
  GL_VERTEX_ARRAY_BINDING = $85B5;

  // GL_ARB_uniform_buffer_object
  GL_UNIFORM_BUFFER = $8A11;
  GL_UNIFORM_BUFFER_BINDING = $8A28;
  GL_UNIFORM_BUFFER_START = $8A29;
  GL_UNIFORM_BUFFER_SIZE = $8A2A;
  GL_MAX_VERTEX_UNIFORM_BLOCKS = $8A2B;
  GL_MAX_GEOMETRY_UNIFORM_BLOCKS = $8A2C;
  GL_MAX_FRAGMENT_UNIFORM_BLOCKS = $8A2D;
  GL_MAX_COMBINED_UNIFORM_BLOCKS = $8A2E;
  GL_MAX_UNIFORM_BUFFER_BINDINGS = $8A2F;
  GL_MAX_UNIFORM_BLOCK_SIZE = $8A30;
  GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS = $8A31;
  GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS = $8A32;
  GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS = $8A33;
  GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT = $8A34;
  GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH = $8A35;
  GL_ACTIVE_UNIFORM_BLOCKS = $8A36;
  GL_UNIFORM_TYPE = $8A37;
  GL_UNIFORM_SIZE = $8A38;
  GL_UNIFORM_NAME_LENGTH = $8A39;
  GL_UNIFORM_BLOCK_INDEX = $8A3A;
  GL_UNIFORM_OFFSET = $8A3B;
  GL_UNIFORM_ARRAY_STRIDE = $8A3C;
  GL_UNIFORM_MATRIX_STRIDE = $8A3D;
  GL_UNIFORM_IS_ROW_MAJOR = $8A3E;
  GL_UNIFORM_BLOCK_BINDING = $8A3F;
  GL_UNIFORM_BLOCK_DATA_SIZE = $8A40;
  GL_UNIFORM_BLOCK_NAME_LENGTH = $8A41;
  GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS = $8A42;
  GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES = $8A43;
  GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER = $8A44;
  GL_UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER = $8A45;
  GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER = $8A46;
  GL_INVALID_INDEX = $FFFFFFFF;

  // GL_ARB_compatibility
  { ARB_compatibility just defines tokens from core 3.0 }

  // GL_ARB_copy_buffer
  GL_COPY_READ_BUFFER_BINDING = $8F36;
  GL_COPY_READ_BUFFER = GL_COPY_READ_BUFFER_BINDING;
  GL_COPY_WRITE_BUFFER_BINDING = $8F37;
  GL_COPY_WRITE_BUFFER = GL_COPY_WRITE_BUFFER_BINDING;

  // GL_ARB_depth_clamp
  GL_DEPTH_CLAMP = $864F;

  // GL_ARB_provoking_vertex
  GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION = $8E4C;
  GL_FIRST_VERTEX_CONVENTION = $8E4D;
  GL_LAST_VERTEX_CONVENTION = $8E4E;
  GL_PROVOKING_VERTEX = $8E4F;

  // GL_ARB_seamless_cube_map
  GL_TEXTURE_CUBE_MAP_SEAMLESS = $884F;

  // GL_ARB_sync
  GL_MAX_SERVER_WAIT_TIMEOUT = $9111;
  GL_OBJECT_TYPE = $9112;
  GL_SYNC_CONDITION = $9113;
  GL_SYNC_STATUS = $9114;
  GL_SYNC_FLAGS = $9115;
  GL_SYNC_FENCE = $9116;
  GL_SYNC_GPU_COMMANDS_COMPLETE = $9117;
  GL_UNSIGNALED = $9118;
  GL_SIGNALED = $9119;
  GL_ALREADY_SIGNALED = $911A;
  GL_TIMEOUT_EXPIRED = $911B;
  GL_CONDITION_SATISFIED = $911C;
  GL_WAIT_FAILED = $911D;
  GL_SYNC_FLUSH_COMMANDS_BIT = $00000001;
  GL_TIMEOUT_IGNORED = $FFFFFFFFFFFFFFFF;

  // GL_ARB_texture_multisample
  GL_SAMPLE_POSITION = $8E50;
  GL_SAMPLE_MASK = $8E51;
  GL_SAMPLE_MASK_VALUE = $8E52;
  GL_MAX_SAMPLE_MASK_WORDS = $8E59;
  GL_TEXTURE_2D_MULTISAMPLE = $9100;
  GL_PROXY_TEXTURE_2D_MULTISAMPLE = $9101;
  GL_TEXTURE_2D_MULTISAMPLE_ARRAY = $9102;
  GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY = $9103;
  GL_TEXTURE_BINDING_2D_MULTISAMPLE = $9104;
  GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY = $9105;
  GL_TEXTURE_SAMPLES = $9106;
  GL_TEXTURE_FIXED_SAMPLE_LOCATIONS = $9107;
  GL_SAMPLER_2D_MULTISAMPLE = $9108;
  GL_INT_SAMPLER_2D_MULTISAMPLE = $9109;
  GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE = $910A;
  GL_SAMPLER_2D_MULTISAMPLE_ARRAY = $910B;
  GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY = $910C;
  GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY = $910D;
  GL_MAX_COLOR_TEXTURE_SAMPLES = $910E;
  GL_MAX_DEPTH_TEXTURE_SAMPLES = $910F;
  GL_MAX_INTEGER_SAMPLES = $9110;

  // GL_ARB_vertex_array_bgra
  { reuse GL_BGRA }

  // GL_ARB_sample_shading
  GL_SAMPLE_SHADING_ARB = $8C36;
  GL_MIN_SAMPLE_SHADING_VALUE_ARB = $8C37;

  // GL_ARB_sample_locations
  GL_SAMPLE_LOCATION_SUBPIXEL_BITS_ARB = $933D;
  GL_SAMPLE_LOCATION_PIXEL_GRID_WIDTH_ARB = $933E;
  GL_SAMPLE_LOCATION_PIXEL_GRID_HEIGHT_ARB = $933F;
  GL_PROGRAMMABLE_SAMPLE_LOCATION_TABLE_SIZE_ARB = $9340;
  GL_SAMPLE_LOCATION_ARB = $8E50;
  GL_PROGRAMMABLE_SAMPLE_LOCATION_ARB = $9341;
  GL_FRAMEBUFFER_PROGRAMMABLE_SAMPLE_LOCATIONS_ARB = $9342;
  GL_FRAMEBUFFER_SAMPLE_LOCATION_PIXEL_GRID_ARB = $9343;

  // GL_ARB_texture_cube_map_array
  GL_TEXTURE_CUBE_MAP_ARRAY_ARB = $9009;
  GL_TEXTURE_BINDING_CUBE_MAP_ARRAY_ARB = $900A;
  GL_PROXY_TEXTURE_CUBE_MAP_ARRAY_ARB = $900B;
  GL_SAMPLER_CUBE_MAP_ARRAY_ARB = $900C;
  GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW_ARB = $900D;
  GL_INT_SAMPLER_CUBE_MAP_ARRAY_ARB = $900E;
  GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY_ARB = $900F;

  // GL_ARB_texture_gather
  GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET_ARB = $8E5E;
  GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET_ARB = $8E5F;

  // GL_ARB_shading_language_include
  GL_SHADER_INCLUDE_ARB = $8DAE;
  GL_NAMED_STRING_LENGTH_ARB = $8DE9;
  GL_NAMED_STRING_TYPE_ARB = $8DEA;

  // GL_ARB_texture_compression_bptc
  GL_COMPRESSED_RGBA_BPTC_UNORM_ARB = $8E8C;
  GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB = $8E8D;
  GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB = $8E8E;
  GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB = $8E8F;

  // GL_ARB_blend_func_extended
  GL_SRC1_COLOR = $88F9;
  GL_ONE_MINUS_SRC1_COLOR = $88FA;
  GL_ONE_MINUS_SRC1_ALPHA = $88FB;
  GL_MAX_DUAL_SOURCE_DRAW_BUFFERS = $88FC;

  // GL_ARB_occlusion_query2
  GL_ANY_SAMPLES_PASSED = $8C2F;

  // GL_ARB_parallel_shader_compile
  GL_MAX_SHADER_COMPILER_THREADS_ARB = $91B0;
  GL_COMPLETION_STATUS_ARB = $91B1;

  // GL_ARB_sampler_objects
  GL_SAMPLER_BINDING = $8919;

  // GL_ARB_texture_rgb10_a2ui
  GL_RGB10_A2UI = $906F;

  // GL_ARB_texture_swizzle
  GL_TEXTURE_SWIZZLE_R = $8E42;
  GL_TEXTURE_SWIZZLE_G = $8E43;
  GL_TEXTURE_SWIZZLE_B = $8E44;
  GL_TEXTURE_SWIZZLE_A = $8E45;
  GL_TEXTURE_SWIZZLE_RGBA = $8E46;

  // GL_ARB_SPARSE_TEXTURE
  GL_TEXTURE_SPARSE_ARB = $91A6;
  GL_VIRTUAL_PAGE_SIZE_INDEX_ARB = $91A7;
  GL_NUM_VIRTUAL_PAGE_SIZES_ARB = $91A8;
  GL_SPARSE_TEXTURE_FULL_ARRAY_CUBE_MIPMAPS_ARB = $91A9;
  GL_NUM_SPARSE_LEVELS_ARB = $91AA;
  GL_VIRTUAL_PAGE_SIZE_X_ARB = $9195;
  GL_VIRTUAL_PAGE_SIZE_Y_ARB = $9196;
  GL_VIRTUAL_PAGE_SIZE_Z_ARB = $9197;
  GL_MAX_SPARSE_TEXTURE_SIZE_ARB = $9198;
  GL_MAX_SPARSE_3D_TEXTURE_SIZE_ARB = $9199;
  GL_MAX_SPARSE_ARRAY_TEXTURE_LAYERS_ARB = $919A;
  GL_MIN_SPARSE_LEVEL_ARB = $919B;

  // GL_ARB_timer_query
  GL_TIME_ELAPSED = $88BF;
  GL_TIMESTAMP = $8E28;

  // GL_ARB_vertex_type_2_10_10_10_rev
  { reuse GL_UNSIGNED_INT_2_10_10_10_REV }
  GL_INT_2_10_10_10_REV = $8D9F;

  // GL_ARB_draw_indirect
  GL_DRAW_INDIRECT_BUFFER = $8F3F;
  GL_DRAW_INDIRECT_BUFFER_BINDING = $8F43;

  // GL_ARB_gpu_shader5
  GL_GEOMETRY_SHADER_INVOCATIONS = $887F;
  GL_MAX_GEOMETRY_SHADER_INVOCATIONS = $8E5A;
  GL_MIN_FRAGMENT_INTERPOLATION_OFFSET = $8E5B;
  GL_MAX_FRAGMENT_INTERPOLATION_OFFSET = $8E5C;
  GL_FRAGMENT_INTERPOLATION_OFFSET_BITS = $8E5D;

  // GL_ARB_gpu_shader_fp64
  GL_DOUBLE_VEC2 = $8FFC;
  GL_DOUBLE_VEC3 = $8FFD;
  GL_DOUBLE_VEC4 = $8FFE;
  GL_DOUBLE_MAT2 = $8F46;
  GL_DOUBLE_MAT3 = $8F47;
  GL_DOUBLE_MAT4 = $8F48;
  GL_DOUBLE_MAT2x3 = $8F49;
  GL_DOUBLE_MAT2x4 = $8F4A;
  GL_DOUBLE_MAT3x2 = $8F4B;
  GL_DOUBLE_MAT3x4 = $8F4C;
  GL_DOUBLE_MAT4x2 = $8F4D;
  GL_DOUBLE_MAT4x3 = $8F4E;

  // GL_ARB_gpu_shader_int64
  GL_INT64_ARB = $140E;
  GL_INT64_VEC2_ARB = $8FE9;
  GL_INT64_VEC3_ARB = $8FEA;
  GL_INT64_VEC4_ARB = $8FEB;
  GL_UNSIGNED_INT64_VEC2_ARB = $8FF5;
  GL_UNSIGNED_INT64_VEC3_ARB = $8FF6;
  GL_UNSIGNED_INT64_VEC4_ARB = $8FF7;

  // GL_ARB_shader_subroutine
  GL_ACTIVE_SUBROUTINES = $8DE5;
  GL_ACTIVE_SUBROUTINE_UNIFORMS = $8DE6;
  GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS = $8E47;
  GL_ACTIVE_SUBROUTINE_MAX_LENGTH = $8E48;
  GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH = $8E49;
  GL_MAX_SUBROUTINES = $8DE7;
  GL_MAX_SUBROUTINE_UNIFORM_LOCATIONS = $8DE8;
  GL_NUM_COMPATIBLE_SUBROUTINES = $8E4A;
  GL_COMPATIBLE_SUBROUTINES = $8E4B;
  // GL_ARB_tessellation_shader
  GL_PATCHES = $000E;
  GL_PATCH_VERTICES = $8E72;
  GL_PATCH_DEFAULT_INNER_LEVEL = $8E73;
  GL_PATCH_DEFAULT_OUTER_LEVEL = $8E74;
  GL_TESS_CONTROL_OUTPUT_VERTICES = $8E75;
  GL_TESS_GEN_MODE = $8E76;
  GL_TESS_GEN_SPACING = $8E77;
  GL_TESS_GEN_VERTEX_ORDER = $8E78;
  GL_TESS_GEN_POINT_MODE = $8E79;
  GL_ISOLINES = $8E7A;
  GL_FRACTIONAL_ODD = $8E7B;
  GL_FRACTIONAL_EVEN = $8E7C;
  GL_MAX_PATCH_VERTICES = $8E7D;
  GL_MAX_TESS_GEN_LEVEL = $8E7E;
  GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS = $8E7F;
  GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS = $8E80;
  GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS = $8E81;
  GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS = $8E82;
  GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS = $8E83;
  GL_MAX_TESS_PATCH_COMPONENTS = $8E84;
  GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS = $8E85;
  GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS = $8E86;
  GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS = $8E89;
  GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS = $8E8A;
  GL_MAX_TESS_CONTROL_INPUT_COMPONENTS = $886C;
  GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS = $886D;
  GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS = $8E1E;
  GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS = $8E1F;
  GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER = $84F0;
  GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER = $84F1;
  GL_TESS_EVALUATION_SHADER = $8E87;
  GL_TESS_CONTROL_SHADER = $8E88;
  // GL_ARB_texture_buffer_object_rgb32
  // GL_ARB_transform_feedback2
  GL_TRANSFORM_FEEDBACK = $8E22;
  GL_TRANSFORM_FEEDBACK_PAUSED = $8E23;
  GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED = GL_TRANSFORM_FEEDBACK_PAUSED;
  GL_TRANSFORM_FEEDBACK_ACTIVE = $8E24;
  GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE = GL_TRANSFORM_FEEDBACK_ACTIVE;
  GL_TRANSFORM_FEEDBACK_BINDING = $8E25;

  // GL_ARB_transform_feedback_overflow_query
  GL_TRANSFORM_FEEDBACK_OVERFLOW_ARB = $82EC;
  GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB = $82ED;

  // GL_ARB_transform_feedback3
  GL_MAX_TRANSFORM_FEEDBACK_BUFFERS = $8E70;
  GL_MAX_VERTEX_STREAMS = $8E71;

  // GL_ARB_ES2_compatibility
  GL_FIXED = $140C;
  GL_IMPLEMENTATION_COLOR_READ_TYPE = $8B9A;
  GL_IMPLEMENTATION_COLOR_READ_FORMAT = $8B9B;
  GL_LOW_FLOAT = $8DF0;
  GL_MEDIUM_FLOAT = $8DF1;
  GL_HIGH_FLOAT = $8DF2;
  GL_LOW_INT = $8DF3;
  GL_MEDIUM_INT = $8DF4;
  GL_HIGH_INT = $8DF5;
  GL_SHADER_COMPILER = $8DFA;
  GL_NUM_SHADER_BINARY_FORMATS = $8DF9;
  GL_MAX_VERTEX_UNIFORM_VECTORS = $8DFB;
  GL_MAX_VARYING_VECTORS = $8DFC;
  GL_MAX_FRAGMENT_UNIFORM_VECTORS = $8DFD;
  GL_RGB565 = $8D62;

  // GL_ARB_ES3_2_compatibility
  GL_PRIMITIVE_BOUNDING_BOX_ARB = $092BE;
  GL_MULTISAMPLE_LINE_WIDTH_RANGE_ARB = $09381;
  GL_MULTISAMPLE_LINE_WIDTH_GRANULARITY_ARB = $09382;

  // GL_ARB_get_program_binary
  GL_PROGRAM_BINARY_RETRIEVABLE_HINT = $8257;
  GL_PROGRAM_BINARY_LENGTH = $8741;
  GL_NUM_PROGRAM_BINARY_FORMATS = $87FE;
  GL_PROGRAM_BINARY_FORMATS = $87FF;

  // GL_ARB_separate_shader_objects
  GL_VERTEX_SHADER_BIT = $00000001;
  GL_FRAGMENT_SHADER_BIT = $00000002;
  GL_GEOMETRY_SHADER_BIT = $00000004;
  GL_TESS_CONTROL_SHADER_BIT = $00000008;
  GL_TESS_EVALUATION_SHADER_BIT = $00000010;
  GL_ALL_SHADER_BITS = $FFFFFFFF;
  GL_PROGRAM_SEPARABLE = $8258;
  GL_ACTIVE_PROGRAM = $8259;
  GL_PROGRAM_PIPELINE_BINDING = $825A;
  // GL_ARB_vertex_attrib_64bit
  GL_MAX_VIEWPORTS = $825B;
  GL_VIEWPORT_SUBPIXEL_BITS = $825C;
  GL_VIEWPORT_BOUNDS_RANGE = $825D;
  GL_LAYER_PROVOKING_VERTEX = $825E;
  GL_VIEWPORT_INDEX_PROVOKING_VERTEX = $825F;
  GL_UNDEFINED_VERTEX = $8260;
  // GL_ARB_cl_event
  GL_SYNC_CL_EVENT_ARB = $8240;
  GL_SYNC_CL_EVENT_COMPLETE_ARB = $8241;

  // GL_ARB_debug_output
  GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB = $8242;
  GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH_ARB = $8243;
  GL_DEBUG_CALLBACK_FUNCTION_ARB = $8244;
  GL_DEBUG_CALLBACK_USER_PARAM_ARB = $8245;
  GL_DEBUG_SOURCE_API_ARB = $8246;
  GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB = $8247;
  GL_DEBUG_SOURCE_SHADER_COMPILER_ARB = $8248;
  GL_DEBUG_SOURCE_THIRD_PARTY_ARB = $8249;
  GL_DEBUG_SOURCE_APPLICATION_ARB = $824A;
  GL_DEBUG_SOURCE_OTHER_ARB = $824B;
  GL_DEBUG_TYPE_ERROR_ARB = $824C;
  GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB = $824D;
  GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB = $824E;
  GL_DEBUG_TYPE_PORTABILITY_ARB = $824F;
  GL_DEBUG_TYPE_PERFORMANCE_ARB = $8250;
  GL_DEBUG_TYPE_OTHER_ARB = $8251;
  GL_MAX_DEBUG_MESSAGE_LENGTH_ARB = $9143;
  GL_MAX_DEBUG_LOGGED_MESSAGES_ARB = $9144;
  GL_DEBUG_LOGGED_MESSAGES_ARB = $9145;
  GL_DEBUG_SEVERITY_HIGH_ARB = $9146;
  GL_DEBUG_SEVERITY_MEDIUM_ARB = $9147;
  GL_DEBUG_SEVERITY_LOW_ARB = $9148;

  // GL_ARB_robustness
  GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB = $00000004;
  GL_LOSE_CONTEXT_ON_RESET_ARB = $8252;
  GL_GUILTY_CONTEXT_RESET_ARB = $8253;
  GL_INNOCENT_CONTEXT_RESET_ARB = $8254;
  GL_UNKNOWN_CONTEXT_RESET_ARB = $8255;
  GL_RESET_NOTIFICATION_STRATEGY_ARB = $8256;
  GL_NO_RESET_NOTIFICATION_ARB = $8261;

  //  GL_ARB_compressed_texture_pixel_storage
  GL_UNPACK_COMPRESSED_BLOCK_WIDTH  = $09127;
  GL_UNPACK_COMPRESSED_BLOCK_HEIGHT = $09128;
  GL_UNPACK_COMPRESSED_BLOCK_DEPTH  = $09129;
  GL_UNPACK_COMPRESSED_BLOCK_SIZE   = $0912A;
  GL_PACK_COMPRESSED_BLOCK_WIDTH    = $0912B;
  GL_PACK_COMPRESSED_BLOCK_HEIGHT   = $0912C;
  GL_PACK_COMPRESSED_BLOCK_DEPTH    = $0912D;
  GL_PACK_COMPRESSED_BLOCK_SIZE     = $0912E;

  // GL_ARB_internalformat_query
  GL_NUM_SAMPLE_COUNTS              = $09380;

  // GL_ARB_map_buffer_alignment
  GL_MIN_MAP_BUFFER_ALIGNMENT       = $090BC;

  // GL_ARB_shader_atomic_counters
  GL_ATOMIC_COUNTER_BUFFER          = $92C0;
  GL_ATOMIC_COUNTER_BUFFER_BINDING  = $92C1;
  GL_ATOMIC_COUNTER_BUFFER_START    = $92C2;
  GL_ATOMIC_COUNTER_BUFFER_SIZE     = $92C3;
  GL_ATOMIC_COUNTER_BUFFER_DATA_SIZE = $92C4;
  GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS = $92C5;
  GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES = $92C6;
  GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER = $92C7;
  GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER = $92C8;
  GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER = $92C9;
  GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER = $92CA;
  GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER = $92CB;
  GL_MAX_VERTEX_ATOMIC_COUNTER_BUFFERS = $92CC;
  GL_MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS = $92CD;
  GL_MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS = $92CE;
  GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS = $92CF;
  GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS = $92D0;
  GL_MAX_COMBINED_ATOMIC_COUNTER_BUFFERS = $92D1;
  GL_MAX_VERTEX_ATOMIC_COUNTERS     = $92D2;
  GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS = $92D3;
  GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS = $92D4;
  GL_MAX_GEOMETRY_ATOMIC_COUNTERS   = $92D5;
  GL_MAX_FRAGMENT_ATOMIC_COUNTERS   = $92D6;
  GL_MAX_COMBINED_ATOMIC_COUNTERS   = $92D7;
  GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE = $92D8;
  GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS = $92DC;
  GL_ACTIVE_ATOMIC_COUNTER_BUFFERS  = $92D9;
  GL_UNIFORM_ATOMIC_COUNTER_BUFFER_INDEX = $92DA;
  GL_UNSIGNED_INT_ATOMIC_COUNTER    = $92DB;

  // GL_ARB_shader_image_load_store
  GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT = $00000001;
  GL_ELEMENT_ARRAY_BARRIER_BIT      = $00000002;
  GL_UNIFORM_BARRIER_BIT            = $00000004;
  GL_TEXTURE_FETCH_BARRIER_BIT      = $00000008;
  GL_SHADER_IMAGE_ACCESS_BARRIER_BIT = $00000020;
  GL_COMMAND_BARRIER_BIT            = $00000040;
  GL_PIXEL_BUFFER_BARRIER_BIT       = $00000080;
  GL_TEXTURE_UPDATE_BARRIER_BIT     = $00000100;
  GL_BUFFER_UPDATE_BARRIER_BIT      = $00000200;
  GL_FRAMEBUFFER_BARRIER_BIT        = $00000400;
  GL_TRANSFORM_FEEDBACK_BARRIER_BIT = $00000800;
  GL_ATOMIC_COUNTER_BARRIER_BIT     = $00001000;
  GL_ALL_BARRIER_BITS               = $FFFFFFFF;
  GL_MAX_IMAGE_UNITS                = $8F38;
  GL_MAX_COMBINED_IMAGE_UNITS_AND_FRAGMENT_OUTPUTS = $8F39;
  GL_IMAGE_BINDING_NAME             = $8F3A;
  GL_IMAGE_BINDING_LEVEL            = $8F3B;
  GL_IMAGE_BINDING_LAYERED          = $8F3C;
  GL_IMAGE_BINDING_LAYER            = $8F3D;
  GL_IMAGE_BINDING_ACCESS           = $8F3E;
  GL_IMAGE_1D                       = $904C;
  GL_IMAGE_2D                       = $904D;
  GL_IMAGE_3D                       = $904E;
  GL_IMAGE_2D_RECT                  = $904F;
  GL_IMAGE_CUBE                     = $9050;
  GL_IMAGE_BUFFER                   = $9051;
  GL_IMAGE_1D_ARRAY                 = $9052;
  GL_IMAGE_2D_ARRAY                 = $9053;
  GL_IMAGE_CUBE_MAP_ARRAY           = $9054;
  GL_IMAGE_2D_MULTISAMPLE           = $9055;
  GL_IMAGE_2D_MULTISAMPLE_ARRAY     = $9056;
  GL_INT_IMAGE_1D                   = $9057;
  GL_INT_IMAGE_2D                   = $9058;
  GL_INT_IMAGE_3D                   = $9059;
  GL_INT_IMAGE_2D_RECT              = $905A;
  GL_INT_IMAGE_CUBE                 = $905B;
  GL_INT_IMAGE_BUFFER               = $905C;
  GL_INT_IMAGE_1D_ARRAY             = $905D;
  GL_INT_IMAGE_2D_ARRAY             = $905E;
  GL_INT_IMAGE_CUBE_MAP_ARRAY       = $905F;
  GL_INT_IMAGE_2D_MULTISAMPLE       = $9060;
  GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY = $9061;
  GL_UNSIGNED_INT_IMAGE_1D          = $9062;
  GL_UNSIGNED_INT_IMAGE_2D          = $9063;
  GL_UNSIGNED_INT_IMAGE_3D          = $9064;
  GL_UNSIGNED_INT_IMAGE_2D_RECT     = $9065;
  GL_UNSIGNED_INT_IMAGE_CUBE        = $9066;
  GL_UNSIGNED_INT_IMAGE_BUFFER      = $9067;
  GL_UNSIGNED_INT_IMAGE_1D_ARRAY    = $9068;
  GL_UNSIGNED_INT_IMAGE_2D_ARRAY    = $9069;
  GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY = $906A;
  GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE = $906B;
  GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY = $906C;
  GL_MAX_IMAGE_SAMPLES              = $906D;
  GL_IMAGE_BINDING_FORMAT           = $906E;
  GL_IMAGE_FORMAT_COMPATIBILITY_TYPE = $90C7;
  GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE = $90C8;
  GL_IMAGE_FORMAT_COMPATIBILITY_BY_CLASS = $90C9;
  GL_MAX_VERTEX_IMAGE_UNIFORMS      = $90CA;
  GL_MAX_TESS_CONTROL_IMAGE_UNIFORMS = $90CB;
  GL_MAX_TESS_EVALUATION_IMAGE_UNIFORMS = $90CC;
  GL_MAX_GEOMETRY_IMAGE_UNIFORMS    = $90CD;
  GL_MAX_FRAGMENT_IMAGE_UNIFORMS    = $90CE;
  GL_MAX_COMBINED_IMAGE_UNIFORMS    = $90CF;

  // GL_ARB_texture_storage
  GL_TEXTURE_IMMUTABLE_FORMAT       = $912F;

  // 4.3
  // GL_KHR_texture_compression_astc_hdr
  GL_COMPRESSED_RGBA_ASTC_4x4_KHR = $93B0;
  GL_COMPRESSED_RGBA_ASTC_5x4_KHR = $93B1;
  GL_COMPRESSED_RGBA_ASTC_5x5_KHR = $93B2;
  GL_COMPRESSED_RGBA_ASTC_6x5_KHR = $93B3;
  GL_COMPRESSED_RGBA_ASTC_6x6_KHR = $93B4;
  GL_COMPRESSED_RGBA_ASTC_8x5_KHR = $93B5;
  GL_COMPRESSED_RGBA_ASTC_8x6_KHR = $93B6;
  GL_COMPRESSED_RGBA_ASTC_8x8_KHR = $93B7;
  GL_COMPRESSED_RGBA_ASTC_105_KHR = $93B8;
  GL_COMPRESSED_RGBA_ASTC_106_KHR = $93B9;
  GL_COMPRESSED_RGBA_ASTC_108_KHR = $93BA;
  GL_COMPRESSED_RGBA_ASTC_110_KHR = $93BB;
  GL_COMPRESSED_RGBA_ASTC_12x10_KHR = $93BC;
  GL_COMPRESSED_RGBA_ASTC_12x12_KHR = $93BD;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR = $93D0;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR = $93D1;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR = $93D2;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR = $93D3;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR = $93D4;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR = $93D5;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR = $93D6;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR = $93D7;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR = $93D8;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR = $93D9;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR = $93DA;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR = $93DB;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR = $93DC;
  GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR = $93DD;
  // (4.3) GL_KHR_debug
  GL_DEBUG_OUTPUT_SYNCHRONOUS       = $8242;
  GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH = $8243;
  GL_DEBUG_CALLBACK_FUNCTION        = $8244;
  GL_DEBUG_CALLBACK_USER_PARAM      = $8245;
  GL_DEBUG_SOURCE_API               = $8246;
  GL_DEBUG_SOURCE_WINDOW_SYSTEM     = $8247;
  GL_DEBUG_SOURCE_SHADER_COMPILER   = $8248;
  GL_DEBUG_SOURCE_THIRD_PARTY       = $8249;
  GL_DEBUG_SOURCE_APPLICATION       = $824A;
  GL_DEBUG_SOURCE_OTHER             = $824B;
  GL_DEBUG_TYPE_ERROR               = $824C;
  GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR = $824D;
  GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR  = $824E;
  GL_DEBUG_TYPE_PORTABILITY         = $824F;
  GL_DEBUG_TYPE_PERFORMANCE         = $8250;
  GL_DEBUG_TYPE_OTHER               = $8251;
  GL_DEBUG_TYPE_MARKER              = $8268;
  GL_DEBUG_TYPE_PUSH_GROUP          = $8269;
  GL_DEBUG_TYPE_POP_GROUP           = $826A;
  GL_DEBUG_SEVERITY_NOTIFICATION    = $826B;
  GL_MAX_DEBUG_GROUP_STACK_DEPTH    = $826C;
  GL_DEBUG_GROUP_STACK_DEPTH        = $826D;
  GL_BUFFER                         = $82E0;
  GL_SHADER                         = $82E1;
  GL_PROGRAM                        = $82E2;
  GL_QUERY                          = $82E3;
  GL_PROGRAM_PIPELINE               = $82E4;
  GL_SAMPLER                        = $82E6;
  GL_DISPLAY_LIST                   = $82E7;
  GL_MAX_LABEL_LENGTH               = $82E8;
  GL_MAX_DEBUG_MESSAGE_LENGTH       = $9143;
  GL_MAX_DEBUG_LOGGED_MESSAGES      = $9144;
  GL_DEBUG_LOGGED_MESSAGES          = $9145;
  GL_DEBUG_SEVERITY_HIGH            = $9146;
  GL_DEBUG_SEVERITY_MEDIUM          = $9147;
  GL_DEBUG_SEVERITY_LOW             = $9148;
  GL_DEBUG_OUTPUT                   = $92E0;
  GL_CONTEXT_FLAG_DEBUG_BIT         = $00000002;
  GL_COMPUTE_SHADER                 = $91B9;
  GL_MAX_COMPUTE_UNIFORM_BLOCKS     = $91BB;
  GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS = $91BC;
  GL_MAX_COMPUTE_IMAGE_UNIFORMS     = $91BD;
  GL_MAX_COMPUTE_SHARED_MEMORY_SIZE = $8262;
  GL_MAX_COMPUTE_UNIFORM_COMPONENTS = $8263;
  GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS = $8264;
  GL_MAX_COMPUTE_ATOMIC_COUNTERS    = $8265;
  GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS = $8266;
  GL_MAX_COMPUTE_LOCAL_INVOCATIONS  = $90EB;
  GL_MAX_COMPUTE_WORK_GROUP_COUNT   = $91BE;
  GL_MAX_COMPUTE_WORK_GROUP_SIZE    = $91BF;
  GL_COMPUTE_LOCAL_WORK_SIZE        = $8267;
  GL_UNIFORM_BLOCK_REFERENCED_BY_COMPUTE_SHADER = $90EC;
  GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_COMPUTE_SHADER = $90ED;
  GL_DISPATCH_INDIRECT_BUFFER       = $90EE;
  GL_DISPATCH_INDIRECT_BUFFER_BINDING = $90EF;
  GL_COMPUTE_SHADER_BIT             = $00000020;
  GL_COMPRESSED_RGB8_ETC2           = $9274;
  GL_COMPRESSED_SRGB8_ETC2          = $9275;
  GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 = $9276;
  GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2 = $9277;
  GL_COMPRESSED_RGBA8_ETC2_EAC      = $9278;
  GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC = $9279;
  GL_COMPRESSED_R11_EAC             = $9270;
  GL_COMPRESSED_SIGNED_R11_EAC      = $9271;
  GL_COMPRESSED_RG11_EAC            = $9272;
  GL_COMPRESSED_SIGNED_RG11_EAC     = $9273;
  GL_PRIMITIVE_RESTART_FIXED_INDEX  = $8D69;
  GL_ANY_SAMPLES_PASSED_CONSERVATIVE = $8D6A;
  GL_MAX_ELEMENT_INDEX              = $8D6B;
      GL_MAX_UNIFORM_LOCATIONS          = $826E;
  GL_FRAMEBUFFER_DEFAULT_WIDTH      = $9310;
  GL_FRAMEBUFFER_DEFAULT_HEIGHT     = $9311;
  GL_FRAMEBUFFER_DEFAULT_LAYERS     = $9312;
  GL_FRAMEBUFFER_DEFAULT_SAMPLES    = $9313;
  GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS = $9314;
  GL_MAX_FRAMEBUFFER_WIDTH          = $9315;
  GL_MAX_FRAMEBUFFER_HEIGHT         = $9316;
  GL_MAX_FRAMEBUFFER_LAYERS         = $9317;
  GL_MAX_FRAMEBUFFER_SAMPLES        = $9318;
        GL_INTERNALFORMAT_SUPPORTED       = $826F;
  GL_INTERNALFORMAT_PREFERRED       = $8270;
  GL_INTERNALFORMAT_RED_SIZE        = $8271;
  GL_INTERNALFORMAT_GREEN_SIZE      = $8272;
  GL_INTERNALFORMAT_BLUE_SIZE       = $8273;
  GL_INTERNALFORMAT_ALPHA_SIZE      = $8274;
  GL_INTERNALFORMAT_DEPTH_SIZE      = $8275;
  GL_INTERNALFORMAT_STENCIL_SIZE    = $8276;
  GL_INTERNALFORMAT_SHARED_SIZE     = $8277;
  GL_INTERNALFORMAT_RED_TYPE        = $8278;
  GL_INTERNALFORMAT_GREEN_TYPE      = $8279;
  GL_INTERNALFORMAT_BLUE_TYPE       = $827A;
  GL_INTERNALFORMAT_ALPHA_TYPE      = $827B;
  GL_INTERNALFORMAT_DEPTH_TYPE      = $827C;
  GL_INTERNALFORMAT_STENCIL_TYPE    = $827D;
  GL_MAX_WIDTH                      = $827E;
  GL_MAX_HEIGHT                     = $827F;
  GL_MAX_DEPTH                      = $8280;
  GL_MAX_LAYERS                     = $8281;
  GL_MAX_COMBINED_DIMENSIONS        = $8282;
  GL_COLOR_COMPONENTS               = $8283;
  GL_DEPTH_COMPONENTS               = $8284;
  GL_STENCIL_COMPONENTS             = $8285;
  GL_COLOR_RENDERABLE               = $8286;
  GL_DEPTH_RENDERABLE               = $8287;
  GL_STENCIL_RENDERABLE             = $8288;
  GL_FRAMEBUFFER_RENDERABLE         = $8289;
  GL_FRAMEBUFFER_RENDERABLE_LAYERED = $828A;
  GL_FRAMEBUFFER_BLEND              = $828B;
  GL_READ_PIXELS                    = $828C;
  GL_READ_PIXELS_FORMAT             = $828D;
  GL_READ_PIXELS_TYPE               = $828E;
  GL_TEXTURE_IMAGE_FORMAT           = $828F;
  GL_TEXTURE_IMAGE_TYPE             = $8290;
  GL_GET_TEXTURE_IMAGE_FORMAT       = $8291;
  GL_GET_TEXTURE_IMAGE_TYPE         = $8292;
  GL_MIPMAP                         = $8293;
  GL_MANUAL_GENERATE_MIPMAP         = $8294;
  GL_AUTO_GENERATE_MIPMAP           = $8295;
  GL_COLOR_ENCODING                 = $8296;
  GL_SRGB_READ                      = $8297;
  GL_SRGB_WRITE                     = $8298;
  GL_SRGB_DECODE_ARB                = $8299;
  GL_FILTER                         = $829A;
  GL_VERTEX_TEXTURE                 = $829B;
  GL_TESS_CONTROL_TEXTURE           = $829C;
  GL_TESS_EVALUATION_TEXTURE        = $829D;
  GL_GEOMETRY_TEXTURE               = $829E;
  GL_FRAGMENT_TEXTURE               = $829F;
  GL_COMPUTE_TEXTURE                = $82A0;
  GL_TEXTURE_SHADOW                 = $82A1;
  GL_TEXTURE_GATHER                 = $82A2;
  GL_TEXTURE_GATHER_SHADOW          = $82A3;
  GL_SHADER_IMAGE_LOAD              = $82A4;
  GL_SHADER_IMAGE_STORE             = $82A5;
  GL_SHADER_IMAGE_ATOMIC            = $82A6;
  GL_IMAGE_TEXEL_SIZE               = $82A7;
  GL_IMAGE_COMPATIBILITY_CLASS      = $82A8;
  GL_IMAGE_PIXEL_FORMAT             = $82A9;
  GL_IMAGE_PIXEL_TYPE               = $82AA;
  GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_TEST = $82AC;
  GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_TEST = $82AD;
  GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_WRITE = $82AE;
  GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_WRITE = $82AF;
  GL_TEXTURE_COMPRESSED_BLOCK_WIDTH = $82B1;
  GL_TEXTURE_COMPRESSED_BLOCK_HEIGHT = $82B2;
  GL_TEXTURE_COMPRESSED_BLOCK_SIZE  = $82B3;
  GL_CLEAR_BUFFER                   = $82B4;
  GL_TEXTURE_VIEW                   = $82B5;
  GL_VIEW_COMPATIBILITY_CLASS       = $82B6;
  GL_FULL_SUPPORT                   = $82B7;
  GL_CAVEAT_SUPPORT                 = $82B8;
  GL_IMAGE_CLASS_4_X_32             = $82B9;
  GL_IMAGE_CLASS_2_X_32             = $82BA;
  GL_IMAGE_CLASS_1_X_32             = $82BB;
  GL_IMAGE_CLASS_4_X_16             = $82BC;
  GL_IMAGE_CLASS_2_X_16             = $82BD;
  GL_IMAGE_CLASS_1_X_16             = $82BE;
  GL_IMAGE_CLASS_4_X_8              = $82BF;
  GL_IMAGE_CLASS_2_X_8              = $82C0;
  GL_IMAGE_CLASS_1_X_8              = $82C1;
  GL_IMAGE_CLASS_11_11_10           = $82C2;
  GL_IMAGE_CLASS_10_10_10_2         = $82C3;
  GL_VIEW_CLASS_128_BITS            = $82C4;
  GL_VIEW_CLASS_96_BITS             = $82C5;
  GL_VIEW_CLASS_64_BITS             = $82C6;
  GL_VIEW_CLASS_48_BITS             = $82C7;
  GL_VIEW_CLASS_32_BITS             = $82C8;
  GL_VIEW_CLASS_24_BITS             = $82C9;
  GL_VIEW_CLASS_16_BITS             = $82CA;
  GL_VIEW_CLASS_8_BITS              = $82CB;
  GL_VIEW_CLASS_S3TC_DXT1_RGB       = $82CC;
  GL_VIEW_CLASS_S3TC_DXT1_RGBA      = $82CD;
  GL_VIEW_CLASS_S3TC_DXT3_RGBA      = $82CE;
  GL_VIEW_CLASS_S3TC_DXT5_RGBA      = $82CF;
  GL_VIEW_CLASS_RGTC1_RED           = $82D0;
  GL_VIEW_CLASS_RGTC2_RG            = $82D1;
  GL_VIEW_CLASS_BPTC_UNORM          = $82D2;
  GL_VIEW_CLASS_BPTC_FLOAT          = $82D3;
  GL_UNIFORM                        = $92E1;
  GL_UNIFORM_BLOCK                  = $92E2;
  GL_PROGRAM_INPUT                  = $92E3;
  GL_PROGRAM_OUTPUT                 = $92E4;
  GL_BUFFER_VARIABLE                = $92E5;
  GL_SHADER_STORAGE_BLOCK           = $92E6;
  GL_VERTEX_SUBROUTINE              = $92E8;
  GL_TESS_CONTROL_SUBROUTINE        = $92E9;
  GL_TESS_EVALUATION_SUBROUTINE     = $92EA;
  GL_GEOMETRY_SUBROUTINE            = $92EB;
  GL_FRAGMENT_SUBROUTINE            = $92EC;
  GL_COMPUTE_SUBROUTINE             = $92ED;
  GL_VERTEX_SUBROUTINE_UNIFORM      = $92EE;
  GL_TESS_CONTROL_SUBROUTINE_UNIFORM = $92EF;
  GL_TESS_EVALUATION_SUBROUTINE_UNIFORM = $92F0;
  GL_GEOMETRY_SUBROUTINE_UNIFORM    = $92F1;
  GL_FRAGMENT_SUBROUTINE_UNIFORM    = $92F2;
  GL_COMPUTE_SUBROUTINE_UNIFORM     = $92F3;
  GL_TRANSFORM_FEEDBACK_VARYING     = $92F4;
  GL_ACTIVE_RESOURCES               = $92F5;
  GL_MAX_NAME_LENGTH                = $92F6;
  GL_MAX_NUM_ACTIVE_VARIABLES       = $92F7;
  GL_MAX_NUM_COMPATIBLE_SUBROUTINES = $92F8;
  GL_NAME_LENGTH                    = $92F9;
  GL_TYPE                           = $92FA;
  GL_ARRAY_SIZE                     = $92FB;
  GL_OFFSET                         = $92FC;
  GL_BLOCK_INDEX                    = $92FD;
  GL_ARRAY_STRIDE                   = $92FE;
  GL_MATRIX_STRIDE                  = $92FF;
  GL_IS_ROW_MAJOR                   = $9300;
  GL_ATOMIC_COUNTER_BUFFER_INDEX    = $9301;
  GL_BUFFER_BINDING                 = $9302;
  GL_BUFFER_DATA_SIZE               = $9303;
  GL_NUM_ACTIVE_VARIABLES           = $9304;
  GL_ACTIVE_VARIABLES               = $9305;
  GL_REFERENCED_BY_VERTEX_SHADER    = $9306;
  GL_REFERENCED_BY_TESS_CONTROL_SHADER = $9307;
  GL_REFERENCED_BY_TESS_EVALUATION_SHADER = $9308;
  GL_REFERENCED_BY_GEOMETRY_SHADER  = $9309;
  GL_REFERENCED_BY_FRAGMENT_SHADER  = $930A;
  GL_REFERENCED_BY_COMPUTE_SHADER   = $930B;
  GL_TOP_LEVEL_ARRAY_SIZE           = $930C;
  GL_TOP_LEVEL_ARRAY_STRIDE         = $930D;
  GL_LOCATION                       = $930E;
  GL_LOCATION_INDEX                 = $930F;
  GL_IS_PER_PATCH                   = $92E7;
  GL_SHADER_STORAGE_BUFFER          = $90D2;
  GL_SHADER_STORAGE_BUFFER_BINDING  = $90D3;
  GL_SHADER_STORAGE_BUFFER_START    = $90D4;
  GL_SHADER_STORAGE_BUFFER_SIZE     = $90D5;
  GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS = $90D6;
  GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS = $90D7;
  GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS = $90D8;
  GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS = $90D9;
  GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS = $90DA;
  GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS = $90DB;
  GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS = $90DC;
  GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS = $90DD;
  GL_MAX_SHADER_STORAGE_BLOCK_SIZE  = $90DE;
  GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT = $90DF;
  GL_SHADER_STORAGE_BARRIER_BIT     = $2000;
  GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES = GL_MAX_COMBINED_IMAGE_UNITS_AND_FRAGMENT_OUTPUTS;
  GL_DEPTH_STENCIL_TEXTURE_MODE     = $90EA;

  GL_TEXTURE_BUFFER_OFFSET          = $919D;
  GL_TEXTURE_BUFFER_SIZE            = $919E;
  GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT = $919F;
  GL_TEXTURE_VIEW_MIN_LEVEL         = $82DB;
  GL_TEXTURE_VIEW_NUM_LEVELS        = $82DC;
  GL_TEXTURE_VIEW_MIN_LAYER         = $82DD;
  GL_TEXTURE_VIEW_NUM_LAYERS        = $82DE;
  GL_TEXTURE_IMMUTABLE_LEVELS       = $82DF;
  GL_VERTEX_ATTRIB_BINDING          = $82D4;
  GL_VERTEX_ATTRIB_RELATIVE_OFFSET  = $82D5;
  GL_VERTEX_BINDING_DIVISOR         = $82D6;
  GL_VERTEX_BINDING_OFFSET          = $82D7;
  GL_VERTEX_BINDING_STRIDE          = $82D8;
  GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET = $82D9;
  GL_MAX_VERTEX_ATTRIB_BINDINGS     = $82DA;

  // GL 4.4
  GL_MAX_VERTEX_ATTRIB_STRIDE         = $82E5;
  GL_PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED = $8221;
  GL_TEXTURE_BUFFER_BINDING = $8C2A;
  GL_MAP_PERSISTENT_BIT               = $0040;
  GL_MAP_COHERENT_BIT                 = $0080;
  GL_DYNAMIC_STORAGE_BIT              = $0100;
  GL_CLIENT_STORAGE_BIT               = $0200;
  GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT = $00004000;
  GL_BUFFER_IMMUTABLE_STORAGE       	= $821F;
  GL_BUFFER_STORAGE_FLAGS           	= $8220;
  GL_CLEAR_TEXTURE                  	= $9365;
  GL_LOCATION_COMPONENT             	= $934A;
  GL_TRANSFORM_FEEDBACK_BUFFER_INDEX 	= $934B;
  GL_TRANSFORM_FEEDBACK_BUFFER_STRIDE = $934C;
  GL_QUERY_BUFFER                   	= $9192;
  GL_QUERY_BUFFER_BARRIER_BIT       	= $00008000;
  GL_QUERY_BUFFER_BINDING           	= $9193;
  GL_QUERY_RESULT_NO_WAIT           	= $9194;
  GL_MIRROR_CLAMP_TO_EDGE           	= $8743;

  // GL 4.5
  GL_CONTEXT_LOST                   = $0507;
  GL_NEGATIVE_ONE_TO_ONE            = $935E;
  GL_ZERO_TO_ONE                    = $935F;
  GL_CLIP_ORIGIN                    = $935C;
  GL_CLIP_DEPTH_MODE                = $935D;
  GL_QUERY_WAIT_INVERTED            = $8E17;
  GL_QUERY_NO_WAIT_INVERTED         = $8E18;
  GL_QUERY_BY_REGION_WAIT_INVERTED  = $8E19;
  GL_QUERY_BY_REGION_NO_WAIT_INVERTED = $8E1A;
  GL_MAX_CULL_DISTANCES             = $82F9;
  GL_MAX_COMBINED_CLIP_AND_CULL_DISTANCES = $82FA;
  GL_TEXTURE_TARGET                 = $1006;
  GL_QUERY_TARGET                   = $82EA;
  GL_TEXTURE_BINDING                = $82EB;
  GL_GUILTY_CONTEXT_RESET           = $8253;
  GL_INNOCENT_CONTEXT_RESET         = $8254;
  GL_UNKNOWN_CONTEXT_RESET          = $8255;
  GL_RESET_NOTIFICATION_STRATEGY    = $8256;
  GL_LOSE_CONTEXT_ON_RESET          = $8252;
  GL_NO_RESET_NOTIFICATION          = $8261;
  GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT = $00000004;
  GL_CONTEXT_RELEASE_BEHAVIOR       = $82FB;
  GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH = $82FC;

  // 4.6
  GL_SHADER_BINARY_FORMAT_SPIR_V = $9551;
  GL_SPIR_V_BINARY = $9552;
  GL_PARAMETER_BUFFER = $80EE;
  GL_PARAMETER_BUFFER_BINDING = $80EF;
  GL_CONTEXT_FLAG_NO_ERROR_BIT = $00000008;
  GL_VERTICES_SUBMITTED = $82EE;
  GL_PRIMITIVES_SUBMITTED = $82EF;
  GL_VERTEX_SHADER_INVOCATIONS = $82F0;
  GL_TESS_CONTROL_SHADER_PATCHES = $82F1;
  GL_TESS_EVALUATION_SHADER_INVOCATIONS = $82F2;
  GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED = $82F3;
  GL_FRAGMENT_SHADER_INVOCATIONS = $82F4;
  GL_COMPUTE_SHADER_INVOCATIONS = $82F5;
  GL_CLIPPING_INPUT_PRIMITIVES = $82F6;
  GL_CLIPPING_OUTPUT_PRIMITIVES = $82F7;
  GL_POLYGON_OFFSET_CLAMP = $8E1B;
  GL_SPIR_V_EXTENSIONS = $9553;
  GL_NUM_SPIR_V_EXTENSIONS = $9554;
  GL_TEXTURE_MAX_ANISOTROPY = $84FE;
  GL_MAX_TEXTURE_MAX_ANISOTROPY = $84FF;
  GL_TRANSFORM_FEEDBACK_OVERFLOW = $82EC;
  GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW = $82ED;  

  // GL_ATI_draw_buffers
  GL_MAX_DRAW_BUFFERS_ATI = $8824;
  GL_DRAW_BUFFER0_ATI = $8825;
  GL_DRAW_BUFFER1_ATI = $8826;
  GL_DRAW_BUFFER2_ATI = $8827;
  GL_DRAW_BUFFER3_ATI = $8828;
  GL_DRAW_BUFFER4_ATI = $8829;
  GL_DRAW_BUFFER5_ATI = $882A;
  GL_DRAW_BUFFER6_ATI = $882B;
  GL_DRAW_BUFFER7_ATI = $882C;
  GL_DRAW_BUFFER8_ATI = $882D;
  GL_DRAW_BUFFER9_ATI = $882E;
  GL_DRAW_BUFFER10_ATI = $882F;
  GL_DRAW_BUFFER11_ATI = $8830;
  GL_DRAW_BUFFER12_ATI = $8831;
  GL_DRAW_BUFFER13_ATI = $8832;
  GL_DRAW_BUFFER14_ATI = $8833;
  GL_DRAW_BUFFER15_ATI = $8834;

  // GL_ATI_element_array
  GL_ELEMENT_ARRAY_ATI = $8768;
  GL_ELEMENT_ARRAY_TYPE_ATI = $8769;
  GL_ELEMENT_ARRAY_POINTER_ATI = $876A;

  // GL_ATI_envmap_bumpmap
  GL_BUMP_ROT_MATRIX_ATI = $8775;
  GL_BUMP_ROT_MATRIX_SIZE_ATI = $8776;
  GL_BUMP_NUM_TEX_UNITS_ATI = $8777;
  GL_BUMP_TEX_UNITS_ATI = $8778;
  GL_DUDV_ATI = $8779;
  GL_DU8DV8_ATI = $877A;
  GL_BUMP_ENVMAP_ATI = $877B;
  GL_BUMP_TARGET_ATI = $877C;

  // GL_ATI_fragment_shader
  GL_FRAGMENT_SHADER_ATI = $8920;
  GL_REG_0_ATI = $8921;
  GL_REG_1_ATI = $8922;
  GL_REG_2_ATI = $8923;
  GL_REG_3_ATI = $8924;
  GL_REG_4_ATI = $8925;
  GL_REG_5_ATI = $8926;
  GL_REG_6_ATI = $8927;
  GL_REG_7_ATI = $8928;
  GL_REG_8_ATI = $8929;
  GL_REG_9_ATI = $892A;
  GL_REG_10_ATI = $892B;
  GL_REG_11_ATI = $892C;
  GL_REG_12_ATI = $892D;
  GL_REG_13_ATI = $892E;
  GL_REG_14_ATI = $892F;
  GL_REG_15_ATI = $8930;
  GL_REG_16_ATI = $8931;
  GL_REG_17_ATI = $8932;
  GL_REG_18_ATI = $8933;
  GL_REG_19_ATI = $8934;
  GL_REG_20_ATI = $8935;
  GL_REG_21_ATI = $8936;
  GL_REG_22_ATI = $8937;
  GL_REG_23_ATI = $8938;
  GL_REG_24_ATI = $8939;
  GL_REG_25_ATI = $893A;
  GL_REG_26_ATI = $893B;
  GL_REG_27_ATI = $893C;
  GL_REG_28_ATI = $893D;
  GL_REG_29_ATI = $893E;
  GL_REG_30_ATI = $893F;
  GL_REG_31_ATI = $8940;
  GL_CON_0_ATI = $8941;
  GL_CON_1_ATI = $8942;
  GL_CON_2_ATI = $8943;
  GL_CON_3_ATI = $8944;
  GL_CON_4_ATI = $8945;
  GL_CON_5_ATI = $8946;
  GL_CON_6_ATI = $8947;
  GL_CON_7_ATI = $8948;
  GL_CON_8_ATI = $8949;
  GL_CON_9_ATI = $894A;
  GL_CON_10_ATI = $894B;
  GL_CON_11_ATI = $894C;
  GL_CON_12_ATI = $894D;
  GL_CON_13_ATI = $894E;
  GL_CON_14_ATI = $894F;
  GL_CON_15_ATI = $8950;
  GL_CON_16_ATI = $8951;
  GL_CON_17_ATI = $8952;
  GL_CON_18_ATI = $8953;
  GL_CON_19_ATI = $8954;
  GL_CON_20_ATI = $8955;
  GL_CON_21_ATI = $8956;
  GL_CON_22_ATI = $8957;
  GL_CON_23_ATI = $8958;
  GL_CON_24_ATI = $8959;
  GL_CON_25_ATI = $895A;
  GL_CON_26_ATI = $895B;
  GL_CON_27_ATI = $895C;
  GL_CON_28_ATI = $895D;
  GL_CON_29_ATI = $895E;
  GL_CON_30_ATI = $895F;
  GL_CON_31_ATI = $8960;
  GL_MOV_ATI = $8961;
  GL_ADD_ATI = $8963;
  GL_MUL_ATI = $8964;
  GL_SUB_ATI = $8965;
  GL_DOT3_ATI = $8966;
  GL_DOT4_ATI = $8967;
  GL_MAD_ATI = $8968;
  GL_LERP_ATI = $8969;
  GL_CND_ATI = $896A;
  GL_CND0_ATI = $896B;
  GL_DOT2_ADD_ATI = $896C;
  GL_SECONDARY_INTERPOLATOR_ATI = $896D;
  GL_NUM_FRAGMENT_REGISTERS_ATI = $896E;
  GL_NUM_FRAGMENT_CONSTANTS_ATI = $896F;
  GL_NUM_PASSES_ATI = $8970;
  GL_NUM_INSTRUCTIONS_PER_PASS_ATI = $8971;
  GL_NUM_INSTRUCTIONS_TOTAL_ATI = $8972;
  GL_NUM_INPUT_INTERPOLATOR_COMPONENTS_ATI = $8973;
  GL_NUM_LOOPBACK_COMPONENTS_ATI = $8974;
  GL_COLOR_ALPHA_PAIRING_ATI = $8975;
  GL_SWIZZLE_STR_ATI = $8976;
  GL_SWIZZLE_STQ_ATI = $8977;
  GL_SWIZZLE_STR_DR_ATI = $8978;
  GL_SWIZZLE_STQ_DQ_ATI = $8979;
  GL_SWIZZLE_STRQ_ATI = $897A;
  GL_SWIZZLE_STRQ_DQ_ATI = $897B;
  GL_RED_BIT_ATI = $00000001;
  GL_GREEN_BIT_ATI = $00000002;
  GL_BLUE_BIT_ATI = $00000004;
  GL_2X_BIT_ATI = $00000001;
  GL_4X_BIT_ATI = $00000002;
  GL_8X_BIT_ATI = $00000004;
  GL_HALF_BIT_ATI = $00000008;
  GL_QUARTER_BIT_ATI = $00000010;
  GL_EIGHTH_BIT_ATI = $00000020;
  GL_SATURATE_BIT_ATI = $00000040;
  GL_COMP_BIT_ATI = $00000002;
  GL_NEGATE_BIT_ATI = $00000004;
  GL_BIAS_BIT_ATI = $00000008;

  // GL_ATI_pn_triangles
  GL_PN_TRIANGLES_ATI = $87F0;
  GL_MAX_PN_TRIANGLES_TESSELATION_LEVEL_ATI = $87F1;
  GL_PN_TRIANGLES_POINT_MODE_ATI = $87F2;
  GL_PN_TRIANGLES_NORMAL_MODE_ATI = $87F3;
  GL_PN_TRIANGLES_TESSELATION_LEVEL_ATI = $87F4;
  GL_PN_TRIANGLES_POINT_MODE_LINEAR_ATI = $87F5;
  GL_PN_TRIANGLES_POINT_MODE_CUBIC_ATI = $87F6;
  GL_PN_TRIANGLES_NORMAL_MODE_LINEAR_ATI = $87F7;
  GL_PN_TRIANGLES_NORMAL_MODE_QUADRATIC_ATI = $87F8;

  // GL_ATI_separate_stencil
  GL_STENCIL_BACK_FUNC_ATI = $8800;
  GL_STENCIL_BACK_FAIL_ATI = $8801;
  GL_STENCIL_BACK_PASS_DEPTH_FAIL_ATI = $8802;
  GL_STENCIL_BACK_PASS_DEPTH_PASS_ATI = $8803;

  // GL_ATI_text_fragment_shader
  GL_TEXT_FRAGMENT_SHADER_ATI = $8200;

  // GL_ATI_texture_env_combine3
  GL_MODULATE_ADD_ATI = $8744;
  GL_MODULATE_SIGNED_ADD_ATI = $8745;
  GL_MODULATE_SUBTRACT_ATI = $8746;

  // GL_ATI_texture_float
  GL_RGBA_FLOAT32_ATI = $8814;
  GL_RGB_FLOAT32_ATI = $8815;
  GL_ALPHA_FLOAT32_ATI = $8816;
  GL_INTENSITY_FLOAT32_ATI = $8817;
  GL_LUMINANCE_FLOAT32_ATI = $8818;
  GL_LUMINANCE_ALPHA_FLOAT32_ATI = $8819;
  GL_RGBA_FLOAT16_ATI = $881A;
  GL_RGB_FLOAT16_ATI = $881B;
  GL_ALPHA_FLOAT16_ATI = $881C;
  GL_INTENSITY_FLOAT16_ATI = $881D;
  GL_LUMINANCE_FLOAT16_ATI = $881E;
  GL_LUMINANCE_ALPHA_FLOAT16_ATI = $881F;

  // GL_ATI_texture_mirror_once
  GL_MIRROR_CLAMP_ATI = $8742;
  GL_MIRROR_CLAMP_TO_EDGE_ATI = $8743;

  // GL_ATI_vertex_array_object
  GL_STATIC_ATI = $8760;
  GL_DYNAMIC_ATI = $8761;
  GL_PRESERVE_ATI = $8762;
  GL_DISCARD_ATI = $8763;
  GL_OBJECT_BUFFER_SIZE_ATI = $8764;
  GL_OBJECT_BUFFER_USAGE_ATI = $8765;
  GL_ARRAY_OBJECT_BUFFER_ATI = $8766;
  GL_ARRAY_OBJECT_OFFSET_ATI = $8767;

  // GL_ATI_vertex_streams
  GL_MAX_VERTEX_STREAMS_ATI = $876B;
  GL_VERTEX_STREAM0_ATI = $876C;
  GL_VERTEX_STREAM1_ATI = $876D;
  GL_VERTEX_STREAM2_ATI = $876E;
  GL_VERTEX_STREAM3_ATI = $876F;
  GL_VERTEX_STREAM4_ATI = $8770;
  GL_VERTEX_STREAM5_ATI = $8771;
  GL_VERTEX_STREAM6_ATI = $8772;
  GL_VERTEX_STREAM7_ATI = $8773;
  GL_VERTEX_SOURCE_ATI = $8774;

  // GL_ATI_meminfo
  GL_VBO_FREE_MEMORY_ATI = $87FB;
  GL_TEXTURE_FREE_MEMORY_ATI = $87FC;
  GL_RENDERBUFFER_FREE_MEMORY_ATI = $87FD;

  // GL_AMD_performance_monitor
  GL_COUNTER_TYPE_AMD = $8BC0;
  GL_COUNTER_RANGE_AMD = $8BC1;
  GL_UNSIGNED_INT64_AMD = $8BC2;
  GL_PERCENTAGE_AMD = $8BC3;
  GL_PERFMON_RESULT_AVAILABLE_AMD = $8BC4;
  GL_PERFMON_RESULT_SIZE_AMD = $8BC5;
  GL_PERFMON_RESULT_AMD = $8BC6;

  // GL_AMD_vertex_shader_tesselator
  GL_SAMPLER_BUFFER_AMD = $9001;
  GL_INT_SAMPLER_BUFFER_AMD = $9002;
  GL_UNSIGNED_INT_SAMPLER_BUFFER_AMD = $9003;
  GL_TESSELLATION_MODE_AMD = $9004;
  GL_TESSELLATION_FACTOR_AMD = $9005;
  GL_DISCRETE_AMD = $9006;
  GL_CONTINUOUS_AMD = $9007;

  // GL_AMD_seamless_cubemap_per_texture
  { reuse GL_TEXTURE_CUBE_MAP_SEAMLESS }

  // GL_AMD_name_gen_delete
  GL_DATA_BUFFER_AMD = $9151;
  GL_PERFORMANCE_MONITOR_AMD = $9152;
  GL_QUERY_OBJECT_AMD = $9153;
  GL_VERTEX_ARRAY_OBJECT_AMD = $9154;
  GL_SAMPLER_OBJECT_AMD = $9155;

  // GL_AMD_debug_output
  GL_MAX_DEBUG_LOGGED_MESSAGES_AMD = $9144;
  GL_DEBUG_LOGGED_MESSAGES_AMD = $9145;
  GL_DEBUG_SEVERITY_HIGH_AMD = $9146;
  GL_DEBUG_SEVERITY_MEDIUM_AMD = $9147;
  GL_DEBUG_SEVERITY_LOW_AMD = $9148;
  GL_DEBUG_CATEGORY_API_ERROR_AMD = $9149;
  GL_DEBUG_CATEGORY_WINDOW_SYSTEM_AMD = $914A;
  GL_DEBUG_CATEGORY_DEPRECATION_AMD = $914B;
  GL_DEBUG_CATEGORY_UNDEFINED_BEHAVIOR_AMD = $914C;
  GL_DEBUG_CATEGORY_PERFORMANCE_AMD = $914D;
  GL_DEBUG_CATEGORY_SHADER_COMPILER_AMD = $914E;
  GL_DEBUG_CATEGORY_APPLICATION_AMD = $914F;
  GL_DEBUG_CATEGORY_OTHER_AMD = $9150;

  // GL_AMD_depth_clamp_separate
  GL_DEPTH_CLAMP_NEAR_AMD = $901E;
  GL_DEPTH_CLAMP_FAR_AMD = $901F;

  // GL_EXT_422_pixels
  GL_422_EXT = $80CC;
  GL_422_REV_EXT = $80CD;
  GL_422_AVERAGE_EXT = $80CE;
  GL_422_REV_AVERAGE_EXT = $80CF;

  // GL_EXT_abgr
  GL_ABGR_EXT = $8000;

  // GL_EXT_bgra
  GL_BGR_EXT = $80E0;
  GL_BGRA_EXT = $80E1;

  // GL_EXT_blend_color
  GL_CONSTANT_COLOR_EXT = $8001;
  GL_ONE_MINUS_CONSTANT_COLOR_EXT = $8002;
  GL_CONSTANT_ALPHA_EXT = $8003;
  GL_ONE_MINUS_CONSTANT_ALPHA_EXT = $8004;
  GL_BLEND_COLOR_EXT = $8005;

  // GL_EXT_blend_func_separate
  GL_BLEND_DST_RGB_EXT = $80C8;
  GL_BLEND_SRC_RGB_EXT = $80C9;
  GL_BLEND_DST_ALPHA_EXT = $80CA;
  GL_BLEND_SRC_ALPHA_EXT = $80CB;

  // GL_EXT_blend_minmax
  GL_FUNC_ADD_EXT = $8006;
  GL_MIN_EXT = $8007;
  GL_MAX_EXT = $8008;
  GL_BLEND_EQUATION_EXT = $8009;

  // GL_EXT_blend_subtract
  GL_FUNC_SUBTRACT_EXT = $800A;
  GL_FUNC_REVERSE_SUBTRACT_EXT = $800B;

  // GL_EXT_clip_volume_hint
  GL_CLIP_VOLUME_CLIPPING_HINT_EXT = $80F0;

  // GL_EXT_cmyka
  GL_CMYK_EXT = $800C;
  GL_CMYKA_EXT = $800D;
  GL_PACK_CMYK_HINT_EXT = $800E;
  GL_UNPACK_CMYK_HINT_EXT = $800F;

  // GL_EXT_compiled_vertex_array
  GL_ARRAY_ELEMENT_LOCK_FIRST_EXT = $81A8;
  GL_ARRAY_ELEMENT_LOCK_COUNT_EXT = $81A9;

  // GL_EXT_convolution
  GL_CONVOLUTION_1D_EXT = $8010;
  GL_CONVOLUTION_2D_EXT = $8011;
  GL_SEPARABLE_2D_EXT = $8012;
  GL_CONVOLUTION_BORDER_MODE_EXT = $8013;
  GL_CONVOLUTION_FILTER_SCALE_EXT = $8014;
  GL_CONVOLUTION_FILTER_BIAS_EXT = $8015;
  GL_REDUCE_EXT = $8016;
  GL_CONVOLUTION_FORMAT_EXT = $8017;
  GL_CONVOLUTION_WIDTH_EXT = $8018;
  GL_CONVOLUTION_HEIGHT_EXT = $8019;
  GL_MAX_CONVOLUTION_WIDTH_EXT = $801A;
  GL_MAX_CONVOLUTION_HEIGHT_EXT = $801B;
  GL_POST_CONVOLUTION_RED_SCALE_EXT = $801C;
  GL_POST_CONVOLUTION_GREEN_SCALE_EXT = $801D;
  GL_POST_CONVOLUTION_BLUE_SCALE_EXT = $801E;
  GL_POST_CONVOLUTION_ALPHA_SCALE_EXT = $801F;
  GL_POST_CONVOLUTION_RED_BIAS_EXT = $8020;
  GL_POST_CONVOLUTION_GREEN_BIAS_EXT = $8021;
  GL_POST_CONVOLUTION_BLUE_BIAS_EXT = $8022;
  GL_POST_CONVOLUTION_ALPHA_BIAS_EXT = $8023;

  // GL_EXT_coordinate_frame
  GL_TANGENT_ARRAY_EXT = $8439;
  GL_BINORMAL_ARRAY_EXT = $843A;
  GL_CURRENT_TANGENT_EXT = $843B;
  GL_CURRENT_BINORMAL_EXT = $843C;
  GL_TANGENT_ARRAY_TYPE_EXT = $843E;
  GL_TANGENT_ARRAY_STRIDE_EXT = $843F;
  GL_BINORMAL_ARRAY_TYPE_EXT = $8440;
  GL_BINORMAL_ARRAY_STRIDE_EXT = $8441;
  GL_TANGENT_ARRAY_POINTER_EXT = $8442;
  GL_BINORMAL_ARRAY_POINTER_EXT = $8443;
  GL_MAP1_TANGENT_EXT = $8444;
  GL_MAP2_TANGENT_EXT = $8445;
  GL_MAP1_BINORMAL_EXT = $8446;
  GL_MAP2_BINORMAL_EXT = $8447;

  // GL_EXT_cull_vertex
  GL_CULL_VERTEX_EXT = $81AA;
  GL_CULL_VERTEX_EYE_POSITION_EXT = $81AB;
  GL_CULL_VERTEX_OBJECT_POSITION_EXT = $81AC;

  // GL_EXT_draw_range_elements
  GL_MAX_ELEMENTS_VERTICES_EXT = $80E8;
  GL_MAX_ELEMENTS_INDICES_EXT = $80E9;

  // GL_EXT_fog_coord
  GL_FOG_COORDINATE_SOURCE_EXT = $8450;
  GL_FOG_COORDINATE_EXT = $8451;
  GL_FRAGMENT_DEPTH_EXT = $8452;
  GL_CURRENT_FOG_COORDINATE_EXT = $8453;
  GL_FOG_COORDINATE_ARRAY_TYPE_EXT = $8454;
  GL_FOG_COORDINATE_ARRAY_STRIDE_EXT = $8455;
  GL_FOG_COORDINATE_ARRAY_POINTER_EXT = $8456;
  GL_FOG_COORDINATE_ARRAY_EXT = $8457;

  // GL_EXT_framebuffer_object
  GL_FRAMEBUFFER_EXT = $8D40;
  GL_RENDERBUFFER_EXT = $8D41;
  GL_STENCIL_INDEX_EXT = $8D45;
  GL_STENCIL_INDEX1_EXT = $8D46;
  GL_STENCIL_INDEX4_EXT = $8D47;
  GL_STENCIL_INDEX8_EXT = $8D48;
  GL_STENCIL_INDEX16_EXT = $8D49;
  GL_RENDERBUFFER_WIDTH_EXT = $8D42;
  GL_RENDERBUFFER_HEIGHT_EXT = $8D43;
  GL_RENDERBUFFER_INTERNAL_FORMAT_EXT = $8D44;
  GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT = $8CD0;
  GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT = $8CD1;
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT = $8CD2;
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT = $8CD3;
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT = $8CD4;
  GL_COLOR_ATTACHMENT0_EXT = $8CE0;
  GL_COLOR_ATTACHMENT1_EXT = $8CE1;
  GL_COLOR_ATTACHMENT2_EXT = $8CE2;
  GL_COLOR_ATTACHMENT3_EXT = $8CE3;
  GL_COLOR_ATTACHMENT4_EXT = $8CE4;
  GL_COLOR_ATTACHMENT5_EXT = $8CE5;
  GL_COLOR_ATTACHMENT6_EXT = $8CE6;
  GL_COLOR_ATTACHMENT7_EXT = $8CE7;
  GL_COLOR_ATTACHMENT8_EXT = $8CE8;
  GL_COLOR_ATTACHMENT9_EXT = $8CE9;
  GL_COLOR_ATTACHMENT10_EXT = $8CEA;
  GL_COLOR_ATTACHMENT11_EXT = $8CEB;
  GL_COLOR_ATTACHMENT12_EXT = $8CEC;
  GL_COLOR_ATTACHMENT13_EXT = $8CED;
  GL_COLOR_ATTACHMENT14_EXT = $8CEE;
  GL_COLOR_ATTACHMENT15_EXT = $8CEF;
  GL_DEPTH_ATTACHMENT_EXT = $8D00;
  GL_STENCIL_ATTACHMENT_EXT = $8D20;
  GL_FRAMEBUFFER_COMPLETE_EXT = $8CD5;
  GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT = $8CD6;
  GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT = $8CD7;
  GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT = $8CD8;
  GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT = $8CD9;
  GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT = $8CDA;
  GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT = $8CDB;
  GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT = $8CDC;
  GL_FRAMEBUFFER_UNSUPPORTED_EXT = $8CDD;
  GL_FRAMEBUFFER_STATUS_ERROR_EXT = $8CDE;
  GL_FRAMEBUFFER_BINDING_EXT = $8CA6;
  GL_RENDERBUFFER_BINDING_EXT = $8CA7;
  GL_MAX_COLOR_ATTACHMENTS_EXT = $8CDF;
  GL_MAX_RENDERBUFFER_SIZE_EXT = $84E8;
  GL_INVALID_FRAMEBUFFER_OPERATION_EXT = $0506;

  // GL_EXT_histogram
  GL_HISTOGRAM_EXT = $8024;
  GL_PROXY_HISTOGRAM_EXT = $8025;
  GL_HISTOGRAM_WIDTH_EXT = $8026;
  GL_HISTOGRAM_FORMAT_EXT = $8027;
  GL_HISTOGRAM_RED_SIZE_EXT = $8028;
  GL_HISTOGRAM_GREEN_SIZE_EXT = $8029;
  GL_HISTOGRAM_BLUE_SIZE_EXT = $802A;
  GL_HISTOGRAM_ALPHA_SIZE_EXT = $802B;
  GL_HISTOGRAM_LUMINANCE_SIZE_EXT = $802C;
  GL_HISTOGRAM_SINK_EXT = $802D;
  GL_MINMAX_EXT = $802E;
  GL_MINMAX_FORMAT_EXT = $802F;
  GL_MINMAX_SINK_EXT = $8030;
  GL_TABLE_TOO_LARGE_EXT = $8031;

  // GL_EXT_index_array_formats
  GL_IUI_V2F_EXT = $81AD;
  GL_IUI_V3F_EXT = $81AE;
  GL_IUI_N3F_V2F_EXT = $81AF;
  GL_IUI_N3F_V3F_EXT = $81B0;
  GL_T2F_IUI_V2F_EXT = $81B1;
  GL_T2F_IUI_V3F_EXT = $81B2;
  GL_T2F_IUI_N3F_V2F_EXT = $81B3;
  GL_T2F_IUI_N3F_V3F_EXT = $81B4;

  // GL_EXT_index_func
  GL_INDEX_TEST_EXT = $81B5;
  GL_INDEX_TEST_FUNC_EXT = $81B6;
  GL_INDEX_TEST_REF_EXT = $81B7;

  // GL_EXT_index_material
  GL_INDEX_MATERIAL_EXT = $81B8;
  GL_INDEX_MATERIAL_PARAMETER_EXT = $81B9;
  GL_INDEX_MATERIAL_FACE_EXT = $81BA;

  // GL_EXT_light_texture
  GL_FRAGMENT_MATERIAL_EXT = $8349;
  GL_FRAGMENT_NORMAL_EXT = $834A;
  GL_FRAGMENT_COLOR_EXT = $834C;
  GL_ATTENUATION_EXT = $834D;
  GL_SHADOW_ATTENUATION_EXT = $834E;
  GL_TEXTURE_APPLICATION_MODE_EXT = $834F;
  GL_TEXTURE_LIGHT_EXT = $8350;
  GL_TEXTURE_MATERIAL_FACE_EXT = $8351;
  GL_TEXTURE_MATERIAL_PARAMETER_EXT = $8352;

  // GL_EXT_multisample
  GL_MULTISAMPLE_EXT = $809D;
  GL_SAMPLE_ALPHA_TO_MASK_EXT = $809E;
  GL_SAMPLE_ALPHA_TO_ONE_EXT = $809F;
  GL_SAMPLE_MASK_EXT = $80A0;
  GL_1PASS_EXT = $80A1;
  GL_2PASS_0_EXT = $80A2;
  GL_2PASS_1_EXT = $80A3;
  GL_4PASS_0_EXT = $80A4;
  GL_4PASS_1_EXT = $80A5;
  GL_4PASS_2_EXT = $80A6;
  GL_4PASS_3_EXT = $80A7;
  GL_SAMPLE_BUFFERS_EXT = $80A8;
  GL_SAMPLES_EXT = $80A9;
  GL_SAMPLE_MASK_VALUE_EXT = $80AA;
  GL_SAMPLE_MASK_INVERT_EXT = $80AB;
  GL_SAMPLE_PATTERN_EXT = $80AC;
  GL_MULTISAMPLE_BIT_EXT = $20000000;

  // GL_EXT_packed_pixels
  GL_UNSIGNED_BYTE_3_3_2_EXT = $8032;
  GL_UNSIGNED_SHORT_4_4_4_4_EXT = $8033;
  GL_UNSIGNED_SHORT_5_5_5_1_EXT = $8034;
  GL_UNSIGNED_INT_8_8_8_8_EXT = $8035;
  GL_UNSIGNED_INT_10_10_10_2_EXT = $8036;

  // GL_EXT_paletted_texture
  GL_COLOR_INDEX1_EXT = $80E2;
  GL_COLOR_INDEX2_EXT = $80E3;
  GL_COLOR_INDEX4_EXT = $80E4;
  GL_COLOR_INDEX8_EXT = $80E5;
  GL_COLOR_INDEX12_EXT = $80E6;
  GL_COLOR_INDEX16_EXT = $80E7;
  GL_TEXTURE_INDEX_SIZE_EXT = $80ED;

  // GL_EXT_pixel_transform
  GL_PIXEL_TRANSFORM_2D_EXT = $8330;
  GL_PIXEL_MAG_FILTER_EXT = $8331;
  GL_PIXEL_MIN_FILTER_EXT = $8332;
  GL_PIXEL_CUBIC_WEIGHT_EXT = $8333;
  GL_CUBIC_EXT = $8334;
  GL_AVERAGE_EXT = $8335;
  GL_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT = $8336;
  GL_MAX_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT = $8337;
  GL_PIXEL_TRANSFORM_2D_MATRIX_EXT = $8338;

  // GL_EXT_point_parameters
  GL_POINT_SIZE_MIN_EXT = $8126;
  GL_POINT_SIZE_MAX_EXT = $8127;
  GL_POINT_FADE_THRESHOLD_SIZE_EXT = $8128;
  GL_DISTANCE_ATTENUATION_EXT = $8129;

  // GL_EXT_polygon_offset
  GL_POLYGON_OFFSET_EXT = $8037;
  GL_POLYGON_OFFSET_FACTOR_EXT = $8038;
  GL_POLYGON_OFFSET_BIAS_EXT = $8039;

  // GL_EXT_rescale_normal
  GL_RESCALE_NORMAL_EXT = $803A;

  // GL_EXT_secondary_color
  GL_COLOR_SUM_EXT = $8458;
  GL_CURRENT_SECONDARY_COLOR_EXT = $8459;
  GL_SECONDARY_COLOR_ARRAY_SIZE_EXT = $845A;
  GL_SECONDARY_COLOR_ARRAY_TYPE_EXT = $845B;
  GL_SECONDARY_COLOR_ARRAY_STRIDE_EXT = $845C;
  GL_SECONDARY_COLOR_ARRAY_POINTER_EXT = $845D;
  GL_SECONDARY_COLOR_ARRAY_EXT = $845E;

  // GL_EXT_separate_specular_color
  GL_LIGHT_MODEL_COLOR_CONTROL_EXT = $81F8;
  GL_SINGLE_COLOR_EXT = $81F9;
  GL_SEPARATE_SPECULAR_COLOR_EXT = $81FA;

  // GL_EXT_shared_texture_palette
  GL_SHARED_TEXTURE_PALETTE_EXT = $81FB;

  // GL_EXT_stencil_two_side
  GL_STENCIL_TEST_TWO_SIDE_EXT = $8910;
  GL_ACTIVE_STENCIL_FACE_EXT = $8911;

  // GL_EXT_stencil_wrap
  GL_INCR_WRAP_EXT = $8507;
  GL_DECR_WRAP_EXT = $8508;

  // GL_EXT_texture
  GL_ALPHA4_EXT = $803B;
  GL_ALPHA8_EXT = $803C;
  GL_ALPHA12_EXT = $803D;
  GL_ALPHA16_EXT = $803E;
  GL_LUMINANCE4_EXT = $803F;
  GL_LUMINANCE8_EXT = $8040;
  GL_LUMINANCE12_EXT = $8041;
  GL_LUMINANCE16_EXT = $8042;
  GL_LUMINANCE4_ALPHA4_EXT = $8043;
  GL_LUMINANCE6_ALPHA2_EXT = $8044;
  GL_LUMINANCE8_ALPHA8_EXT = $8045;
  GL_LUMINANCE12_ALPHA4_EXT = $8046;
  GL_LUMINANCE12_ALPHA12_EXT = $8047;
  GL_LUMINANCE16_ALPHA16_EXT = $8048;
  GL_INTENSITY_EXT = $8049;
  GL_INTENSITY4_EXT = $804A;
  GL_INTENSITY8_EXT = $804B;
  GL_INTENSITY12_EXT = $804C;
  GL_INTENSITY16_EXT = $804D;
  GL_RGB2_EXT = $804E;
  GL_RGB4_EXT = $804F;
  GL_RGB5_EXT = $8050;
  GL_RGB8_EXT = $8051;
  GL_RGB10_EXT = $8052;
  GL_RGB12_EXT = $8053;
  GL_RGB16_EXT = $8054;
  GL_RGBA2_EXT = $8055;
  GL_RGBA4_EXT = $8056;
  GL_RGB5_A1_EXT = $8057;
  GL_RGBA8_EXT = $8058;
  GL_RGB10_A2_EXT = $8059;
  GL_RGBA12_EXT = $805A;
  GL_RGBA16_EXT = $805B;
  GL_TEXTURE_RED_SIZE_EXT = $805C;
  GL_TEXTURE_GREEN_SIZE_EXT = $805D;
  GL_TEXTURE_BLUE_SIZE_EXT = $805E;
  GL_TEXTURE_ALPHA_SIZE_EXT = $805F;
  GL_TEXTURE_LUMINANCE_SIZE_EXT = $8060;
  GL_TEXTURE_INTENSITY_SIZE_EXT = $8061;
  GL_REPLACE_EXT = $8062;
  GL_PROXY_TEXTURE_1D_EXT = $8063;
  GL_PROXY_TEXTURE_2D_EXT = $8064;
  GL_TEXTURE_TOO_LARGE_EXT = $8065;

  // GL_EXT_texture3D
  GL_PACK_SKIP_IMAGES_EXT = $806B;
  GL_PACK_IMAGE_HEIGHT_EXT = $806C;
  GL_UNPACK_SKIP_IMAGES_EXT = $806D;
  GL_UNPACK_IMAGE_HEIGHT_EXT = $806E;
  GL_TEXTURE_3D_EXT = $806F;
  GL_PROXY_TEXTURE_3D_EXT = $8070;
  GL_TEXTURE_DEPTH_EXT = $8071;
  GL_TEXTURE_WRAP_R_EXT = $8072;
  GL_MAX_3D_TEXTURE_SIZE_EXT = $8073;

  // GL_EXT_texture_compression_s3tc
  GL_COMPRESSED_RGB_S3TC_DXT1_EXT = $83F0;
  GL_COMPRESSED_RGBA_S3TC_DXT1_EXT = $83F1;
  GL_COMPRESSED_RGBA_S3TC_DXT3_EXT = $83F2;
  GL_COMPRESSED_RGBA_S3TC_DXT5_EXT = $83F3;

  // GL_EXT_texture_cube_map
  GL_NORMAL_MAP_EXT = $8511;
  GL_REFLECTION_MAP_EXT = $8512;
  GL_TEXTURE_CUBE_MAP_EXT = $8513;
  GL_TEXTURE_BINDING_CUBE_MAP_EXT = $8514;
  GL_TEXTURE_CUBE_MAP_POSITIVE_X_EXT = $8515;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_X_EXT = $8516;
  GL_TEXTURE_CUBE_MAP_POSITIVE_Y_EXT = $8517;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT = $8518;
  GL_TEXTURE_CUBE_MAP_POSITIVE_Z_EXT = $8519;
  GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT = $851A;
  GL_PROXY_TEXTURE_CUBE_MAP_EXT = $851B;
  GL_MAX_CUBE_MAP_TEXTURE_SIZE_EXT = $851C;

  // GL_EXT_texture_edge_clamp
  GL_CLAMP_TO_EDGE_EXT = $812F;

  // GL_EXT_texture_env_combine
  GL_COMBINE_EXT = $8570;
  GL_COMBINE_RGB_EXT = $8571;
  GL_COMBINE_ALPHA_EXT = $8572;
  GL_RGB_SCALE_EXT = $8573;
  GL_ADD_SIGNED_EXT = $8574;
  GL_INTERPOLATE_EXT = $8575;
  GL_CONSTANT_EXT = $8576;
  GL_PRIMARY_COLOR_EXT = $8577;
  GL_PREVIOUS_EXT = $8578;
  GL_SOURCE0_RGB_EXT = $8580;
  GL_SOURCE1_RGB_EXT = $8581;
  GL_SOURCE2_RGB_EXT = $8582;
  GL_SOURCE0_ALPHA_EXT = $8588;
  GL_SOURCE1_ALPHA_EXT = $8589;
  GL_SOURCE2_ALPHA_EXT = $858A;
  GL_OPERAND0_RGB_EXT = $8590;
  GL_OPERAND1_RGB_EXT = $8591;
  GL_OPERAND2_RGB_EXT = $8592;
  GL_OPERAND0_ALPHA_EXT = $8598;
  GL_OPERAND1_ALPHA_EXT = $8599;
  GL_OPERAND2_ALPHA_EXT = $859A;

  // GL_EXT_texture_env_dot3
  GL_DOT3_RGB_EXT = $8740;
  GL_DOT3_RGBA_EXT = $8741;

  // GL_EXT_texture_filter_anisotropic
  GL_TEXTURE_MAX_ANISOTROPY_EXT = $84FE;
  GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT = $84FF;

  // GL_EXT_texture_lod_bias
  GL_MAX_TEXTURE_LOD_BIAS_EXT = $84FD;
  GL_TEXTURE_FILTER_CONTROL_EXT = $8500;
  GL_TEXTURE_LOD_BIAS_EXT = $8501;

  // GL_EXT_texture_object
  GL_TEXTURE_PRIORITY_EXT = $8066;
  GL_TEXTURE_RESIDENT_EXT = $8067;
  GL_TEXTURE_1D_BINDING_EXT = $8068;
  GL_TEXTURE_2D_BINDING_EXT = $8069;
  GL_TEXTURE_3D_BINDING_EXT = $806A;

  // GL_EXT_texture_perturb_normal
  GL_PERTURB_EXT = $85AE;
  GL_TEXTURE_NORMAL_EXT = $85AF;

  // GL_EXT_texture_rectangle
  GL_TEXTURE_RECTANGLE_EXT = $84F5;
  GL_TEXTURE_BINDING_RECTANGLE_EXT = $84F6;
  GL_PROXY_TEXTURE_RECTANGLE_EXT = $84F7;
  GL_MAX_RECTANGLE_TEXTURE_SIZE_EXT = $84F8;

  // GL_EXT_vertex_array
  GL_VERTEX_ARRAY_EXT = $8074;
  GL_NORMAL_ARRAY_EXT = $8075;
  GL_COLOR_ARRAY_EXT = $8076;
  GL_INDEX_ARRAY_EXT = $8077;
  GL_TEXTURE_COORD_ARRAY_EXT = $8078;
  GL_EDGE_FLAG_ARRAY_EXT = $8079;
  GL_VERTEX_ARRAY_SIZE_EXT = $807A;
  GL_VERTEX_ARRAY_TYPE_EXT = $807B;
  GL_VERTEX_ARRAY_STRIDE_EXT = $807C;
  GL_VERTEX_ARRAY_COUNT_EXT = $807D;
  GL_NORMAL_ARRAY_TYPE_EXT = $807E;
  GL_NORMAL_ARRAY_STRIDE_EXT = $807F;
  GL_NORMAL_ARRAY_COUNT_EXT = $8080;
  GL_COLOR_ARRAY_SIZE_EXT = $8081;
  GL_COLOR_ARRAY_TYPE_EXT = $8082;
  GL_COLOR_ARRAY_STRIDE_EXT = $8083;
  GL_COLOR_ARRAY_COUNT_EXT = $8084;
  GL_INDEX_ARRAY_TYPE_EXT = $8085;
  GL_INDEX_ARRAY_STRIDE_EXT = $8086;
  GL_INDEX_ARRAY_COUNT_EXT = $8087;
  GL_TEXTURE_COORD_ARRAY_SIZE_EXT = $8088;
  GL_TEXTURE_COORD_ARRAY_TYPE_EXT = $8089;
  GL_TEXTURE_COORD_ARRAY_STRIDE_EXT = $808A;
  GL_TEXTURE_COORD_ARRAY_COUNT_EXT = $808B;
  GL_EDGE_FLAG_ARRAY_STRIDE_EXT = $808C;
  GL_EDGE_FLAG_ARRAY_COUNT_EXT = $808D;
  GL_VERTEX_ARRAY_POINTER_EXT = $808E;
  GL_NORMAL_ARRAY_POINTER_EXT = $808F;
  GL_COLOR_ARRAY_POINTER_EXT = $8090;
  GL_INDEX_ARRAY_POINTER_EXT = $8091;
  GL_TEXTURE_COORD_ARRAY_POINTER_EXT = $8092;
  GL_EDGE_FLAG_ARRAY_POINTER_EXT = $8093;

  // GL_EXT_vertex_shader
  GL_VERTEX_SHADER_EXT = $8780;
  GL_VERTEX_SHADER_BINDING_EXT = $8781;
  GL_OP_INDEX_EXT = $8782;
  GL_OP_NEGATE_EXT = $8783;
  GL_OP_DOT3_EXT = $8784;
  GL_OP_DOT4_EXT = $8785;
  GL_OP_MUL_EXT = $8786;
  GL_OP_ADD_EXT = $8787;
  GL_OP_MADD_EXT = $8788;
  GL_OP_FRAC_EXT = $8789;
  GL_OP_MAX_EXT = $878A;
  GL_OP_MIN_EXT = $878B;
  GL_OP_SET_GE_EXT = $878C;
  GL_OP_SET_LT_EXT = $878D;
  GL_OP_CLAMP_EXT = $878E;
  GL_OP_FLOOR_EXT = $878F;
  GL_OP_ROUND_EXT = $8790;
  GL_OP_EXP_BASE_2_EXT = $8791;
  GL_OP_LOG_BASE_2_EXT = $8792;
  GL_OP_POWER_EXT = $8793;
  GL_OP_RECIP_EXT = $8794;
  GL_OP_RECIP_SQRT_EXT = $8795;
  GL_OP_SUB_EXT = $8796;
  GL_OP_CROSS_PRODUCT_EXT = $8797;
  GL_OP_MULTIPLY_MATRIX_EXT = $8798;
  GL_OP_MOV_EXT = $8799;
  GL_OUTPUT_VERTEX_EXT = $879A;
  GL_OUTPUT_COLOR0_EXT = $879B;
  GL_OUTPUT_COLOR1_EXT = $879C;
  GL_OUTPUT_TEXTURE_COORD0_EXT = $879D;
  GL_OUTPUT_TEXTURE_COORD1_EXT = $879E;
  GL_OUTPUT_TEXTURE_COORD2_EXT = $879F;
  GL_OUTPUT_TEXTURE_COORD3_EXT = $87A0;
  GL_OUTPUT_TEXTURE_COORD4_EXT = $87A1;
  GL_OUTPUT_TEXTURE_COORD5_EXT = $87A2;
  GL_OUTPUT_TEXTURE_COORD6_EXT = $87A3;
  GL_OUTPUT_TEXTURE_COORD7_EXT = $87A4;
  GL_OUTPUT_TEXTURE_COORD8_EXT = $87A5;
  GL_OUTPUT_TEXTURE_COORD9_EXT = $87A6;
  GL_OUTPUT_TEXTURE_COORD10_EXT = $87A7;
  GL_OUTPUT_TEXTURE_COORD11_EXT = $87A8;
  GL_OUTPUT_TEXTURE_COORD12_EXT = $87A9;
  GL_OUTPUT_TEXTURE_COORD13_EXT = $87AA;
  GL_OUTPUT_TEXTURE_COORD14_EXT = $87AB;
  GL_OUTPUT_TEXTURE_COORD15_EXT = $87AC;
  GL_OUTPUT_TEXTURE_COORD16_EXT = $87AD;
  GL_OUTPUT_TEXTURE_COORD17_EXT = $87AE;
  GL_OUTPUT_TEXTURE_COORD18_EXT = $87AF;
  GL_OUTPUT_TEXTURE_COORD19_EXT = $87B0;
  GL_OUTPUT_TEXTURE_COORD20_EXT = $87B1;
  GL_OUTPUT_TEXTURE_COORD21_EXT = $87B2;
  GL_OUTPUT_TEXTURE_COORD22_EXT = $87B3;
  GL_OUTPUT_TEXTURE_COORD23_EXT = $87B4;
  GL_OUTPUT_TEXTURE_COORD24_EXT = $87B5;
  GL_OUTPUT_TEXTURE_COORD25_EXT = $87B6;
  GL_OUTPUT_TEXTURE_COORD26_EXT = $87B7;
  GL_OUTPUT_TEXTURE_COORD27_EXT = $87B8;
  GL_OUTPUT_TEXTURE_COORD28_EXT = $87B9;
  GL_OUTPUT_TEXTURE_COORD29_EXT = $87BA;
  GL_OUTPUT_TEXTURE_COORD30_EXT = $87BB;
  GL_OUTPUT_TEXTURE_COORD31_EXT = $87BC;
  GL_OUTPUT_FOG_EXT = $87BD;
  GL_SCALAR_EXT = $87BE;
  GL_VECTOR_EXT = $87BF;
  GL_MATRIX_EXT = $87C0;
  GL_VARIANT_EXT = $87C1;
  GL_INVARIANT_EXT = $87C2;
  GL_LOCAL_CONSTANT_EXT = $87C3;
  GL_LOCAL_EXT = $87C4;
  GL_MAX_VERTEX_SHADER_INSTRUCTIONS_EXT = $87C5;
  GL_MAX_VERTEX_SHADER_VARIANTS_EXT = $87C6;
  GL_MAX_VERTEX_SHADER_INVARIANTS_EXT = $87C7;
  GL_MAX_VERTEX_SHADER_LOCAL_CONSTANTS_EXT = $87C8;
  GL_MAX_VERTEX_SHADER_LOCALS_EXT = $87C9;
  GL_MAX_OPTIMIZED_VERTEX_SHADER_INSTRUCTIONS_EXT = $87CA;
  GL_MAX_OPTIMIZED_VERTEX_SHADER_VARIANTS_EXT = $87CB;
  GL_MAX_OPTIMIZED_VERTEX_SHADER_LOCAL_CONSTANTS_EXT = $87CC;
  GL_MAX_OPTIMIZED_VERTEX_SHADER_INVARIANTS_EXT = $87CD;
  GL_MAX_OPTIMIZED_VERTEX_SHADER_LOCALS_EXT = $87CE;
  GL_VERTEX_SHADER_INSTRUCTIONS_EXT = $87CF;
  GL_VERTEX_SHADER_VARIANTS_EXT = $87D0;
  GL_VERTEX_SHADER_INVARIANTS_EXT = $87D1;
  GL_VERTEX_SHADER_LOCAL_CONSTANTS_EXT = $87D2;
  GL_VERTEX_SHADER_LOCALS_EXT = $87D3;
  GL_VERTEX_SHADER_OPTIMIZED_EXT = $87D4;
  GL_X_EXT = $87D5;
  GL_Y_EXT = $87D6;
  GL_Z_EXT = $87D7;
  GL_W_EXT = $87D8;
  GL_NEGATIVE_X_EXT = $87D9;
  GL_NEGATIVE_Y_EXT = $87DA;
  GL_NEGATIVE_Z_EXT = $87DB;
  GL_NEGATIVE_W_EXT = $87DC;
  GL_ZERO_EXT = $87DD;
  GL_ONE_EXT = $87DE;
  GL_NEGATIVE_ONE_EXT = $87DF;
  GL_NORMALIZED_RANGE_EXT = $87E0;
  GL_FULL_RANGE_EXT = $87E1;
  GL_CURRENT_VERTEX_EXT = $87E2;
  GL_MVP_MATRIX_EXT = $87E3;
  GL_VARIANT_VALUE_EXT = $87E4;
  GL_VARIANT_DATATYPE_EXT = $87E5;
  GL_VARIANT_ARRAY_STRIDE_EXT = $87E6;
  GL_VARIANT_ARRAY_TYPE_EXT = $87E7;
  GL_VARIANT_ARRAY_EXT = $87E8;
  GL_VARIANT_ARRAY_POINTER_EXT = $87E9;
  GL_INVARIANT_VALUE_EXT = $87EA;
  GL_INVARIANT_DATATYPE_EXT = $87EB;
  GL_LOCAL_CONSTANT_VALUE_EXT = $87EC;
  GL_LOCAL_CONSTANT_DATATYPE_EXT = $87ED;

  // GL_EXT_vertex_weighting
  GL_MODELVIEW0_STACK_DEPTH_EXT = $0BA3;
  GL_MODELVIEW1_STACK_DEPTH_EXT = $8502;
  GL_MODELVIEW0_MATRIX_EXT = $0BA6;
  GL_MODELVIEW1_MATRIX_EXT = $8506;
  GL_VERTEX_WEIGHTING_EXT = $8509;
  GL_MODELVIEW0_EXT = $1700;
  GL_MODELVIEW1_EXT = $850A;
  GL_CURRENT_VERTEX_WEIGHT_EXT = $850B;
  GL_VERTEX_WEIGHT_ARRAY_EXT = $850C;
  GL_VERTEX_WEIGHT_ARRAY_SIZE_EXT = $850D;
  GL_VERTEX_WEIGHT_ARRAY_TYPE_EXT = $850E;
  GL_VERTEX_WEIGHT_ARRAY_STRIDE_EXT = $850F;
  GL_VERTEX_WEIGHT_ARRAY_POINTER_EXT = $8510;

  // GL_EXT_depth_bounds_test
  GL_DEPTH_BOUNDS_TEST_EXT = $8890;
  GL_DEPTH_BOUNDS_EXT = $8891;

  // GL_EXT_texture_mirror_clamp
  GL_MIRROR_CLAMP_EXT = $8742;
  GL_MIRROR_CLAMP_TO_EDGE_EXT = $8743;
  GL_MIRROR_CLAMP_TO_BORDER_EXT = $8912;

  // GL_EXT_blend_equation_separate
  GL_BLEND_EQUATION_RGB_EXT = $8009;
  GL_BLEND_EQUATION_ALPHA_EXT = $883D;

  // GL_EXT_pixel_buffer_object
  GL_PIXEL_PACK_BUFFER_EXT = $88EB;
  GL_PIXEL_UNPACK_BUFFER_EXT = $88EC;
  GL_PIXEL_PACK_BUFFER_BINDING_EXT = $88ED;
  GL_PIXEL_UNPACK_BUFFER_BINDING_EXT = $88EF;

  // GL_EXT_stencil_clear_tag
  GL_STENCIL_TAG_BITS_EXT = $88F2;
  GL_STENCIL_CLEAR_TAG_VALUE_EXT = $88F3;

  // GL_EXT_packed_depth_stencil
  GL_DEPTH_STENCIL_EXT = $84F9;
  GL_UNSIGNED_INT_24_8_EXT = $84FA;
  GL_DEPTH24_STENCIL8_EXT = $88F0;
  GL_TEXTURE_STENCIL_SIZE_EXT = $88F1;

  // GL_EXT_texture_sRGB
  GL_SRGB_EXT = $8C40;
  GL_SRGB8_EXT = $8C41;
  GL_SRGB_ALPHA_EXT = $8C42;
  GL_SRGB8_ALPHA8_EXT = $8C43;
  GL_SLUMINANCE_ALPHA_EXT = $8C44;
  GL_SLUMINANCE8_ALPHA8_EXT = $8C45;
  GL_SLUMINANCE_EXT = $8C46;
  GL_SLUMINANCE8_EXT = $8C47;
  GL_COMPRESSED_SRGB_EXT = $8C48;
  GL_COMPRESSED_SRGB_ALPHA_EXT = $8C49;
  GL_COMPRESSED_SLUMINANCE_EXT = $8C4A;
  GL_COMPRESSED_SLUMINANCE_ALPHA_EXT = $8C4B;
  GL_COMPRESSED_SRGB_S3TC_DXT1_EXT = $8C4C;
  GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT = $8C4D;
  GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT = $8C4E;
  GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT = $8C4F;

  // GL_EXT_framebuffer_blit
  GL_READ_FRAMEBUFFER_EXT = $8CA8;
  GL_DRAW_FRAMEBUFFER_EXT = $8CA9;
  GL_READ_FRAMEBUFFER_BINDING_EXT = GL_FRAMEBUFFER_BINDING_EXT;
  GL_DRAW_FRAMEBUFFER_BINDING_EXT = $8CAA;

  // GL_EXT_framebuffer_multisample
  GL_RENDERBUFFER_SAMPLES_EXT = $8CAB;
  GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT = $8D56;
  GL_MAX_SAMPLES_EXT = $8D57;

  // GL_EXT_timer_query
  GL_TIME_ELAPSED_EXT = $88BF;

  // GL_EXT_bindable_uniform
  GL_MAX_VERTEX_BINDABLE_UNIFORMS_EXT = $8DE2;
  GL_MAX_FRAGMENT_BINDABLE_UNIFORMS_EXT = $8DE3;
  GL_MAX_GEOMETRY_BINDABLE_UNIFORMS_EXT = $8DE4;
  GL_MAX_BINDABLE_UNIFORM_SIZE_EXT = $8DED;
  GL_UNIFORM_BUFFER_EXT = $8DEE;
  GL_UNIFORM_BUFFER_BINDING_EXT = $8DEF;

  // GL_EXT_framebuffer_sRGB
  GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT = $20B2;
  WGL_FRAMEBUFFER_SRGB_CAPABLE_EXT = $20A9;
  GL_FRAMEBUFFER_SRGB_EXT = $8DB9;
  GL_FRAMEBUFFER_SRGB_CAPABLE_EXT = $8DBA;

  // GL_EXT_geometry_shader4
  GL_GEOMETRY_SHADER_EXT = $8DD9;
  GL_GEOMETRY_VERTICES_OUT_EXT = $8DDA;
  GL_GEOMETRY_INPUT_TYPE_EXT = $8DDB;
  GL_GEOMETRY_OUTPUT_TYPE_EXT = $8DDC;
  GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_EXT = $8C29;
  GL_MAX_GEOMETRY_VARYING_COMPONENTS_EXT = $8DDD;
  GL_MAX_VERTEX_VARYING_COMPONENTS_EXT = $8DDE;
  GL_MAX_VARYING_COMPONENTS_EXT = $8B4B;
  GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_EXT = $8DDF;
  GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT = $8DE0;
  GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_EXT = $8DE1;
  GL_LINES_ADJACENCY_EXT = $A;
  GL_LINE_STRIP_ADJACENCY_EXT = $B;
  GL_TRIANGLES_ADJACENCY_EXT = $C;
  GL_TRIANGLE_STRIP_ADJACENCY_EXT = $D;
  GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_EXT = $8DA8;
  GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_EXT = $8DA9;
  GL_FRAMEBUFFER_ATTACHMENT_LAYERED_EXT = $8DA7;
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT = $8CD4;
  GL_PROGRAM_POINT_SIZE_EXT = $8642;

  // GL_EXT_gpu_shader4
  GL_VERTEX_ATTRIB_ARRAY_INTEGER_EXT = $88FD;
  GL_SAMPLER_1D_ARRAY_EXT = $8DC0;
  GL_SAMPLER_2D_ARRAY_EXT = $8DC1;
  GL_SAMPLER_BUFFER_EXT = $8DC2;
  GL_SAMPLER_1D_ARRAY_SHADOW_EXT = $8DC3;
  GL_SAMPLER_2D_ARRAY_SHADOW_EXT = $8DC4;
  GL_SAMPLER_CUBE_SHADOW_EXT = $8DC5;
  GL_UNSIGNED_INT_VEC2_EXT = $8DC6;
  GL_UNSIGNED_INT_VEC3_EXT = $8DC7;
  GL_UNSIGNED_INT_VEC4_EXT = $8DC8;
  GL_INT_SAMPLER_1D_EXT = $8DC9;
  GL_INT_SAMPLER_2D_EXT = $8DCA;
  GL_INT_SAMPLER_3D_EXT = $8DCB;
  GL_INT_SAMPLER_CUBE_EXT = $8DCC;
  GL_INT_SAMPLER_2D_RECT_EXT = $8DCD;
  GL_INT_SAMPLER_1D_ARRAY_EXT = $8DCE;
  GL_INT_SAMPLER_2D_ARRAY_EXT = $8DCF;
  GL_INT_SAMPLER_BUFFER_EXT = $8DD0;
  GL_UNSIGNED_INT_SAMPLER_1D_EXT = $8DD1;
  GL_UNSIGNED_INT_SAMPLER_2D_EXT = $8DD2;
  GL_UNSIGNED_INT_SAMPLER_3D_EXT = $8DD3;
  GL_UNSIGNED_INT_SAMPLER_CUBE_EXT = $8DD4;
  GL_UNSIGNED_INT_SAMPLER_2D_RECT_EXT = $8DD5;
  GL_UNSIGNED_INT_SAMPLER_1D_ARRAY_EXT = $8DD6;
  GL_UNSIGNED_INT_SAMPLER_2D_ARRAY_EXT = $8DD7;
  GL_UNSIGNED_INT_SAMPLER_BUFFER_EXT = $8DD8;
  GL_MIN_PROGRAM_TEXEL_OFFSET_EXT = $8904;
  GL_MAX_PROGRAM_TEXEL_OFFSET_EXT = $8905;

  // GL_EXT_packed_float
  GL_R11F_G11F_B10F_EXT = $8C3A;
  GL_UNSIGNED_INT_10F_11F_11F_REV_EXT = $8C3B;
  RGBA_SIGNED_COMPONENTS_EXT = $8C3C;
  WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT = $20A8;
  GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT = $20B1;
  GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT = $00000008;

  // GL_EXT_texture_array
  GL_TEXTURE_1D_ARRAY_EXT = $8C18;
  GL_TEXTURE_2D_ARRAY_EXT = $8C1A;
  GL_PROXY_TEXTURE_2D_ARRAY_EXT = $8C1B;
  GL_PROXY_TEXTURE_1D_ARRAY_EXT = $8C19;
  GL_TEXTURE_BINDING_1D_ARRAY_EXT = $8C1C;
  GL_TEXTURE_BINDING_2D_ARRAY_EXT = $8C1D;
  GL_MAX_ARRAY_TEXTURE_LAYERS_EXT = $88FF;
  GL_COMPARE_REF_DEPTH_TO_TEXTURE_EXT = $884E;

  // GL_EXT_texture_buffer_object
  GL_TEXTURE_BUFFER_EXT = $8C2A;
  GL_MAX_TEXTURE_BUFFER_SIZE_EXT = $8C2B;
  GL_TEXTURE_BINDING_BUFFER_EXT = $8C2C;
  GL_TEXTURE_BUFFER_DATA_STORE_BINDING_EXT = $8C2D;
  GL_TEXTURE_BUFFER_FORMAT_EXT = $8C2E;

  // GL_EXT_texture_compression_latc
  GL_COMPRESSED_LUMINANCE_LATC1_EXT = $8C70;
  GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT = $8C71;
  GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT = $8C72;
  GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT = $8C73;

  // GL_EXT_texture_compression_rgtc
  GL_COMPRESSED_RED_RGTC1_EXT = $8DBB;
  GL_COMPRESSED_SIGNED_RED_RGTC1_EXT = $8DBC;
  GL_COMPRESSED_RED_GREEN_RGTC2_EXT = $8DBD;
  GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT = $8DBE;

  // GL_EXT_texture_integer
  GL_RGBA_INTEGER_MODE_EXT = $8D9E;
  GL_RGBA32UI_EXT = $8D70;
  GL_RGB32UI_EXT = $8D71;
  GL_ALPHA32UI_EXT = $8D72;
  GL_INTENSITY32UI_EXT = $8D73;
  GL_LUMINANCE32UI_EXT = $8D74;
  GL_LUMINANCE_ALPHA32UI_EXT = $8D75;
  GL_RGBA16UI_EXT = $8D76;
  GL_RGB16UI_EXT = $8D77;
  GL_ALPHA16UI_EXT = $8D78;
  GL_INTENSITY16UI_EXT = $8D79;
  GL_LUMINANCE16UI_EXT = $8D7A;
  GL_LUMINANCE_ALPHA16UI_EXT = $8D7B;
  GL_RGBA8UI_EXT = $8D7C;
  GL_RGB8UI_EXT = $8D7D;
  GL_ALPHA8UI_EXT = $8D7E;
  GL_INTENSITY8UI_EXT = $8D7F;
  GL_LUMINANCE8UI_EXT = $8D80;
  GL_LUMINANCE_ALPHA8UI_EXT = $8D81;
  GL_RGBA32I_EXT = $8D82;
  GL_RGB32I_EXT = $8D83;
  GL_ALPHA32I_EXT = $8D84;
  GL_INTENSITY32I_EXT = $8D85;
  GL_LUMINANCE32I_EXT = $8D86;
  GL_LUMINANCE_ALPHA32I_EXT = $8D87;
  GL_RGBA16I_EXT = $8D88;
  GL_RGB16I_EXT = $8D89;
  GL_ALPHA16I_EXT = $8D8A;
  GL_INTENSITY16I_EXT = $8D8B;
  GL_LUMINANCE16I_EXT = $8D8C;
  GL_LUMINANCE_ALPHA16I_EXT = $8D8D;
  GL_RGBA8I_EXT = $8D8E;
  GL_RGB8I_EXT = $8D8F;
  GL_ALPHA8I_EXT = $8D90;
  GL_INTENSITY8I_EXT = $8D91;
  GL_LUMINANCE8I_EXT = $8D92;
  GL_LUMINANCE_ALPHA8I_EXT = $8D93;
  GL_RED_INTEGER_EXT = $8D94;
  GL_GREEN_INTEGER_EXT = $8D95;
  GL_BLUE_INTEGER_EXT = $8D96;
  GL_ALPHA_INTEGER_EXT = $8D97;
  GL_RGB_INTEGER_EXT = $8D98;
  GL_RGBA_INTEGER_EXT = $8D99;
  GL_BGR_INTEGER_EXT = $8D9A;
  GL_BGRA_INTEGER_EXT = $8D9B;
  GL_LUMINANCE_INTEGER_EXT = $8D9C;
  GL_LUMINANCE_ALPHA_INTEGER_EXT = $8D9D;

  // GL_EXT_texture_shared_exponent
  GL_RGB9_E5_EXT = $8C3D;
  GL_UNSIGNED_INT_5_9_9_9_REV_EXT = $8C3E;
  GL_TEXTURE_SHARED_SIZE_EXT = $8C3F;

  // GL_EXT_transform_feedback
  GL_TRANSFORM_FEEDBACK_BUFFER_EXT = $8C8E;
  GL_TRANSFORM_FEEDBACK_BUFFER_START_EXT = $8C84;
  GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_EXT = $8C85;
  GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_EXT = $8C8F;
  GL_INTERLEAVED_ATTRIBS_EXT = $8C8C;
  GL_SEPARATE_ATTRIBS_EXT = $8C8D;
  GL_PRIMITIVES_GENERATED_EXT = $8C87;
  GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_EXT = $8C88;
  GL_RASTERIZER_DISCARD_EXT = $8C89;
  GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS_EXT = $8C8A;
  GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_EXT = $8C8B;
  GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_EXT = $8C80;
  GL_TRANSFORM_FEEDBACK_VARYINGS_EXT = $8C83;
  GL_TRANSFORM_FEEDBACK_BUFFER_MODE_EXT = $8C7F;
  GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH_EXT = $8C76;

  // GL_EXT_direct_state_access
  GL_PROGRAM_MATRIX_EXT = $8E2D;
  GL_TRANSPOSE_PROGRAM_MATRIX_EXT = $8E2E;
  GL_PROGRAM_MATRIX_STACK_DEPTH_EXT = $8E2F;

  // GL_EXT_texture_swizzle
  GL_TEXTURE_SWIZZLE_R_EXT = $8E42;
  GL_TEXTURE_SWIZZLE_G_EXT = $8E43;
  GL_TEXTURE_SWIZZLE_B_EXT = $8E44;
  GL_TEXTURE_SWIZZLE_A_EXT = $8E45;
  GL_TEXTURE_SWIZZLE_RGBA_EXT = $8E46;

  // GL_EXT_provoking_vertex
  GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION_EXT = $8E4C;
  GL_FIRST_VERTEX_CONVENTION_EXT = $8E4D;
  GL_LAST_VERTEX_CONVENTION_EXT = $8E4E;
  GL_PROVOKING_VERTEX_EXT = $8E4F;

  // GL_EXT_texture_snorm
  GL_ALPHA_SNORM = $9010;
  GL_LUMINANCE_SNORM = $9011;
  GL_LUMINANCE_ALPHA_SNORM = $9012;
  GL_INTENSITY_SNORM = $9013;
  GL_ALPHA8_SNORM = $9014;
  GL_LUMINANCE8_SNORM = $9015;
  GL_LUMINANCE8_ALPHA8_SNORM = $9016;
  GL_INTENSITY8_SNORM = $9017;
  GL_ALPHA16_SNORM = $9018;
  GL_LUMINANCE16_SNORM = $9019;
  GL_LUMINANCE16_ALPHA16_SNORM = $901A;
  GL_INTENSITY16_SNORM = $901B;

  // GL_EXT_separate_shader_objects
  GL_ACTIVE_PROGRAM_EXT = $8B8D;

  // GL_EXT_shader_image_load_store
  GL_MAX_IMAGE_UNITS_EXT = $8F38;
  GL_MAX_COMBINED_IMAGE_UNITS_AND_FRAGMENT_OUTPUTS_EXT = $8F39;
  GL_IMAGE_BINDING_NAME_EXT = $8F3A;
  GL_IMAGE_BINDING_LEVEL_EXT = $8F3B;
  GL_IMAGE_BINDING_LAYERED_EXT = $8F3C;
  GL_IMAGE_BINDING_LAYER_EXT = $8F3D;
  GL_IMAGE_BINDING_ACCESS_EXT = $8F3E;
  GL_IMAGE_1D_EXT = $904C;
  GL_IMAGE_2D_EXT = $904D;
  GL_IMAGE_3D_EXT = $904E;
  GL_IMAGE_2D_RECT_EXT = $904F;
  GL_IMAGE_CUBE_EXT = $9050;
  GL_IMAGE_BUFFER_EXT = $9051;
  GL_IMAGE_1D_ARRAY_EXT = $9052;
  GL_IMAGE_2D_ARRAY_EXT = $9053;
  GL_IMAGE_CUBE_MAP_ARRAY_EXT = $9054;
  GL_IMAGE_2D_MULTISAMPLE_EXT = $9055;
  GL_IMAGE_2D_MULTISAMPLE_ARRAY_EXT = $9056;
  GL_INT_IMAGE_1D_EXT = $9057;
  GL_INT_IMAGE_2D_EXT = $9058;
  GL_INT_IMAGE_3D_EXT = $9059;
  GL_INT_IMAGE_2D_RECT_EXT = $905A;
  GL_INT_IMAGE_CUBE_EXT = $905B;
  GL_INT_IMAGE_BUFFER_EXT = $905C;
  GL_INT_IMAGE_1D_ARRAY_EXT = $905D;
  GL_INT_IMAGE_2D_ARRAY_EXT = $905E;
  GL_INT_IMAGE_CUBE_MAP_ARRAY_EXT = $905F;
  GL_INT_IMAGE_2D_MULTISAMPLE_EXT = $9060;
  GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY_EXT = $9061;
  GL_UNSIGNED_INT_IMAGE_1D_EXT = $9062;
  GL_UNSIGNED_INT_IMAGE_2D_EXT = $9063;
  GL_UNSIGNED_INT_IMAGE_3D_EXT = $9064;
  GL_UNSIGNED_INT_IMAGE_2D_RECT_EXT = $9065;
  GL_UNSIGNED_INT_IMAGE_CUBE_EXT = $9066;
  GL_UNSIGNED_INT_IMAGE_BUFFER_EXT = $9067;
  GL_UNSIGNED_INT_IMAGE_1D_ARRAY_EXT = $9068;
  GL_UNSIGNED_INT_IMAGE_2D_ARRAY_EXT = $9069;
  GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY_EXT = $906A;
  GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_EXT = $906B;
  GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY_EXT = $906C;
  GL_MAX_IMAGE_SAMPLES_EXT = $906D;
  GL_IMAGE_BINDING_FORMAT_EXT = $906E;
  GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT_EXT = $00000001;
  GL_ELEMENT_ARRAY_BARRIER_BIT_EXT = $00000002;
  GL_UNIFORM_BARRIER_BIT_EXT = $00000004;
  GL_TEXTURE_FETCH_BARRIER_BIT_EXT = $00000008;
  GL_SHADER_IMAGE_ACCESS_BARRIER_BIT_EXT = $00000020;
  GL_COMMAND_BARRIER_BIT_EXT = $00000040;
  GL_PIXEL_BUFFER_BARRIER_BIT_EXT = $00000080;
  GL_TEXTURE_UPDATE_BARRIER_BIT_EXT = $00000100;
  GL_BUFFER_UPDATE_BARRIER_BIT_EXT = $00000200;
  GL_FRAMEBUFFER_BARRIER_BIT_EXT = $00000400;
  GL_TRANSFORM_FEEDBACK_BARRIER_BIT_EXT = $00000800;
  GL_ATOMIC_COUNTER_BARRIER_BIT_EXT = $00001000;
  GL_ALL_BARRIER_BITS_EXT = $FFFFFFFF;

  // GL_EXT_vertex_attrib_64bit
  { reuse GL_DOUBLE }
  GL_DOUBLE_VEC2_EXT = $8FFC;
  GL_DOUBLE_VEC3_EXT = $8FFD;
  GL_DOUBLE_VEC4_EXT = $8FFE;
  GL_DOUBLE_MAT2_EXT = $8F46;
  GL_DOUBLE_MAT3_EXT = $8F47;
  GL_DOUBLE_MAT4_EXT = $8F48;
  GL_DOUBLE_MAT2x3_EXT = $8F49;
  GL_DOUBLE_MAT2x4_EXT = $8F4A;
  GL_DOUBLE_MAT3x2_EXT = $8F4B;
  GL_DOUBLE_MAT3x4_EXT = $8F4C;
  GL_DOUBLE_MAT4x2_EXT = $8F4D;
  GL_DOUBLE_MAT4x3_EXT = $8F4E;

  // GL_EXT_texture_sRGB_decode
  GL_TEXTURE_SRGB_DECODE_EXT = $8A48;
  GL_DECODE_EXT = $8A49;
  GL_SKIP_DECODE_EXT = $8A4A;

  // GL_NV_texture_multisample
  GL_TEXTURE_COVERAGE_SAMPLES_NV    = $9045;
  GL_TEXTURE_COLOR_SAMPLES_NV       = $9046;

  // GL_AMD_blend_minmax_factor
  GL_FACTOR_MIN_AMD                 = $901C;
  GL_FACTOR_MAX_AMD                 = $901D;

  // GL_AMD_sample_positions
  GL_SUBSAMPLE_DISTANCE_AMD         = $883F;

  // GL_EXT_x11_sync_object
  GL_SYNC_X11_FENCE_EXT             = $90E1;

  // GL_EXT_framebuffer_multisample_blit_scaled
  GL_SCALED_RESOLVE_FASTEST_EXT     = $90BA;
  GL_SCALED_RESOLVE_NICEST_EXT      = $90BB;

  // (4.3) GL_NV_path_rendering
 	GL_PATH_FORMAT_SVG_NV            = $9070;
 	GL_PATH_FORMAT_PS_NV             = $9071;
 	GL_STANDARD_FONT_NAME_NV         = $9072;
 	GL_SYSTEM_FONT_NAME_NV           = $9073;
 	GL_FILE_NAME_NV                  = $9074;
 	GL_PATH_STROKE_WIDTH_NV          = $9075;
 	GL_PATH_END_CAPS_NV              = $9076;
 	GL_PATH_INITIAL_END_CAP_NV       = $9077;
 	GL_PATH_TERMINAL_END_CAP_NV      = $9078;
 	GL_PATH_JOIN_STYLE_NV            = $9079;
 	GL_PATH_MITER_LIMIT_NV           = $907A;
 	GL_PATH_DASH_CAPS_NV             = $907B;
 	GL_PATH_INITIAL_DASH_CAP_NV      = $907C;
 	GL_PATH_TERMINAL_DASH_CAP_NV     = $907D;
 	GL_PATH_DASH_OFFSET_NV           = $907E;
 	GL_PATH_CLIENT_LENGTH_NV         = $907F;
 	GL_PATH_FILL_MODE_NV             = $9080;
 	GL_PATH_FILL_MASK_NV             = $9081;
 	GL_PATH_FILL_COVER_MODE_NV       = $9082;
 	GL_PATH_STROKE_COVER_MODE_NV     = $9083;
 	GL_PATH_STROKE_MASK_NV           = $9084;
 	GL_PATH_SAMPLE_QUALITY_NV        = $9085;
 	GL_PATH_STROKE_BOUND_NV          = $9086;
 	GL_PATH_STROKE_OVERSAMPLE_COUNT_NV= $9087;
 	GL_COUNT_UP_NV                   = $9088;
 	GL_COUNT_DOWN_NV                 = $9089;
 	GL_PATH_OBJECT_BOUNDING_BOX_NV   = $908A;
 	GL_CONVEX_HULL_NV                = $908B;
 	GL_MULTI_HULLS_NV                = $908C;
 	GL_BOUNDING_BOX_NV               = $908D;
 	GL_TRANSLATE_X_NV                = $908E;
 	GL_TRANSLATE_Y_NV                = $908F;
 	GL_TRANSLATE_2D_NV               = $9090;
 	GL_TRANSLATE_3D_NV               = $9091;
 	GL_AFFINE_2D_NV                  = $9092;
 	GL_PROJECTIVE_2D_NV              = $9093;
 	GL_AFFINE_3D_NV                  = $9094;
 	GL_PROJECTIVE_3D_NV              = $9095;
 	GL_TRANSPOSE_AFFINE_2D_NV        = $9096;
 	GL_TRANSPOSE_PROJECTIVE_2D_NV    = $9097;
	GL_TRANSPOSE_AFFINE_3D_NV        = $9098;
 	GL_TRANSPOSE_PROJECTIVE_3D_NV    = $9099;
 	GL_UTF8_NV                       = $909A;
 	GL_UTF16_NV                      = $909B;
 	GL_BOUNDING_BOX_OF_BOUNDING_BOXES_NV= $909C;
 	GL_PATH_COMMAND_COUNT_NV         = $909D;
 	GL_PATH_COORD_COUNT_NV           = $909E;
  GL_PATH_DASH_ARRAY_COUNT_NV      = $909F;
  GL_PATH_COMPUTED_LENGTH_NV       = $90A0;
  GL_PATH_FILL_BOUNDING_BOX_NV     = $90A1;
  GL_PATH_STROKE_BOUNDING_BOX_NV   = $90A2;
  GL_SQUARE_NV                     = $90A3;
  GL_ROUND_NV                      = $90A4;
  GL_TRIANGULAR_NV                 = $90A5;
  GL_BEVEL_NV                      = $90A6;
  GL_MITER_REVERT_NV               = $90A7;
  GL_MITER_TRUNCATE_NV             = $90A8;
  GL_SKIP_MISSING_GLYPH_NV         = $90A9;
  GL_USE_MISSING_GLYPH_NV          = $90AA;
  GL_PATH_ERROR_POSITION_NV        = $90AB;
  GL_PATH_FOG_GEN_MODE_NV          = $90AC;
  GL_ACCUM_ADJACENT_PAIRS_NV       = $90AD;
  GL_ADJACENT_PAIRS_NV             = $90AE;
  GL_FIRST_TO_REST_NV              = $90AF;
  GL_PATH_GEN_MODE_NV              = $90B0;
  GL_PATH_GEN_COEFF_NV             = $90B1;
  GL_PATH_GEN_COLOR_FORMAT_NV      = $90B2;
  GL_PATH_GEN_COMPONENTS_NV        = $90B3;
  GL_PATH_STENCIL_FUNC_NV          = $90B7;
  GL_PATH_STENCIL_REF_NV           = $90B8;
  GL_PATH_STENCIL_VALUE_MASK_NV    = $90B9;
  GL_PATH_STENCIL_DEPTH_OFFSET_FACTOR_NV= $90BD;
  GL_PATH_STENCIL_DEPTH_OFFSET_UNITS_NV= $90BE;
  GL_PATH_COVER_DEPTH_FUNC_NV      = $90BF;
  GL_PATH_DASH_OFFSET_RESET_NV     = $90B4;
  GL_MOVE_TO_RESETS_NV             = $90B5;
  GL_MOVE_TO_CONTINUES_NV          = $90B6;
  GL_CLOSE_PATH_NV                 = $00;
  GL_MOVE_TO_NV                    = $02;
  GL_RELATIVE_MOVE_TO_NV           = $03;
  GL_LINE_TO_NV                    = $04;
  GL_RELATIVE_LINE_TO_NV           = $05;
  GL_HORIZONTAL_LINE_TO_NV         = $06;
  GL_RELATIVE_HORIZONTAL_LINE_TO_NV= $07;
  GL_VERTICAL_LINE_TO_NV           = $08;
  GL_RELATIVE_VERTICAL_LINE_TO_NV  = $09;
  GL_QUADRATIC_CURVE_TO_NV         = $0A;
  GL_RELATIVE_QUADRATIC_CURVE_TO_NV= $0B;
  GL_CUBIC_CURVE_TO_NV             = $0C;
  GL_RELATIVE_CUBIC_CURVE_TO_NV    = $0D;
  GL_SMOOTH_QUADRATIC_CURVE_TO_NV  = $0E;
  GL_RELATIVE_SMOOTH_QUADRATIC_CURVE_TO_NV= $0F;
  GL_SMOOTH_CUBIC_CURVE_TO_NV      = $10;
  GL_RELATIVE_SMOOTH_CUBIC_CURVE_TO_NV= $11;
  GL_SMALL_CCW_ARC_TO_NV           = $12;
  GL_RELATIVE_SMALL_CCW_ARC_TO_NV  = $13;
  GL_SMALL_CW_ARC_TO_NV            = $14;
  GL_RELATIVE_SMALL_CW_ARC_TO_NV   = $15;
  GL_LARGE_CCW_ARC_TO_NV           = $16;
  GL_RELATIVE_LARGE_CCW_ARC_TO_NV  = $17;
  GL_LARGE_CW_ARC_TO_NV            = $18;
  GL_RELATIVE_LARGE_CW_ARC_TO_NV   = $19;
  GL_RESTART_PATH_NV               = $F0;
  GL_DUP_FIRST_CUBIC_CURVE_TO_NV   = $F2;
  GL_DUP_LAST_CUBIC_CURVE_TO_NV    = $F4;
  GL_RECT_NV                       = $F6;
  GL_CIRCULAR_CCW_ARC_TO_NV        = $F8;
  GL_CIRCULAR_CW_ARC_TO_NV         = $FA;
  GL_CIRCULAR_TANGENT_ARC_TO_NV    = $FC;
  GL_ARC_TO_NV                     = $FE;
  GL_RELATIVE_ARC_TO_NV            = $FF;
  GL_BOLD_BIT_NV                   = $01;
  GL_ITALIC_BIT_NV                 = $02;
  GL_GLYPH_WIDTH_BIT_NV            = $01;
  GL_GLYPH_HEIGHT_BIT_NV           = $02;
  GL_GLYPH_HORIZONTAL_BEARING_X_BIT_NV= $04;
  GL_GLYPH_HORIZONTAL_BEARING_Y_BIT_NV= $08;
  GL_GLYPH_HORIZONTAL_BEARING_ADVANCE_BIT_NV= $10;
  GL_GLYPH_VERTICAL_BEARING_X_BIT_NV= $20;
  GL_GLYPH_VERTICAL_BEARING_Y_BIT_NV= $40;
  GL_GLYPH_VERTICAL_BEARING_ADVANCE_BIT_NV= $80;
  GL_GLYPH_HAS_KERNING_NV          = $100;
  GL_FONT_X_MIN_BOUNDS_NV          = $00010000;
  GL_FONT_Y_MIN_BOUNDS_NV          = $00020000;
  GL_FONT_X_MAX_BOUNDS_NV          = $00040000;
  GL_FONT_Y_MAX_BOUNDS_NV          = $00080000;
  GL_FONT_UNITS_PER_EM_NV          = $00100000;
  GL_FONT_ASCENDER_NV              = $00200000;
  GL_FONT_DESCENDER_NV             = $00400000;
  GL_FONT_HEIGHT_NV                = $00800000;
  GL_FONT_MAX_ADVANCE_WIDTH_NV     = $01000000;
  GL_FONT_MAX_ADVANCE_HEIGHT_NV    = $02000000;
  GL_FONT_UNDERLINE_POSITION_NV    = $04000000;
  GL_FONT_UNDERLINE_THICKNESS_NV   = $08000000;
  GL_FONT_HAS_KERNING_NV           = $10000000;

  // (4.3) GL_AMD_pinned_memory
  GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD= $9160;

  // (4.3) GL_AMD_stencil_operation_extended
  GL_SET_AMD                       = $874A;
  GL_REPLACE_VALUE_AMD             = $874B;
  GL_STENCIL_OP_VALUE_AMD          = $874C;
  GL_STENCIL_BACK_OP_VALUE_AMD     = $874D;

  // (4.3) GL_AMD_vertex_shader_viewport_index

  // (4.3) GL_AMD_vertex_shader_layer

  // (4.3) GL_NV_bindless_texture

  // (4.3) GL_NV_shader_atomic_float

  // (4.3) GL_AMD_query_buffer_object
  GL_QUERY_BUFFER_AMD              = $9192;
  GL_QUERY_BUFFER_BINDING_AMD      = $9193;
  GL_QUERY_RESULT_NO_WAIT_AMD      = $9194;

  // GL_FfdMaskSGIX
  GL_TEXTURE_DEFORMATION_BIT_SGIX = $00000001;
  GL_GEOMETRY_DEFORMATION_BIT_SGIX = $00000002;

  // GL_HP_convolution_border_modes
  GL_IGNORE_BORDER_HP = $8150;
  GL_CONSTANT_BORDER_HP = $8151;
  GL_REPLICATE_BORDER_HP = $8153;
  GL_CONVOLUTION_BORDER_COLOR_HP = $8154;

  // GL_HP_image_transform
  GL_IMAGE_SCALE_X_HP = $8155;
  GL_IMAGE_SCALE_Y_HP = $8156;
  GL_IMAGE_TRANSLATE_X_HP = $8157;
  GL_IMAGE_TRANSLATE_Y_HP = $8158;
  GL_IMAGE_ROTATE_ANGLE_HP = $8159;
  GL_IMAGE_ROTATE_ORIGIN_X_HP = $815A;
  GL_IMAGE_ROTATE_ORIGIN_Y_HP = $815B;
  GL_IMAGE_MAG_FILTER_HP = $815C;
  GL_IMAGE_MIN_FILTER_HP = $815D;
  GL_IMAGE_CUBIC_WEIGHT_HP = $815E;
  GL_CUBIC_HP = $815F;
  GL_AVERAGE_HP = $8160;
  GL_IMAGE_TRANSFORM_2D_HP = $8161;
  GL_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP = $8162;
  GL_PROXY_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP = $8163;

  // GL_HP_occlusion_test
  GL_OCCLUSION_TEST_HP = $8165;
  GL_OCCLUSION_TEST_RESULT_HP = $8166;

  // GL_HP_texture_lighting
  GL_TEXTURE_LIGHTING_MODE_HP = $8167;
  GL_TEXTURE_POST_SPECULAR_HP = $8168;
  GL_TEXTURE_PRE_SPECULAR_HP = $8169;

  // GL_IBM_cull_vertex
  GL_CULL_VERTEX_IBM = 103050;

  // GL_IBM_rasterpos_clip
  GL_RASTER_POSITION_UNCLIPPED_IBM = $19262;

  // GL_IBM_texture_mirrored_repeat
  GL_MIRRORED_REPEAT_IBM = $8370;

  // GL_IBM_vertex_array_lists
  GL_VERTEX_ARRAY_LIST_IBM = 103070;
  GL_NORMAL_ARRAY_LIST_IBM = 103071;
  GL_COLOR_ARRAY_LIST_IBM = 103072;
  GL_INDEX_ARRAY_LIST_IBM = 103073;
  GL_TEXTURE_COORD_ARRAY_LIST_IBM = 103074;
  GL_EDGE_FLAG_ARRAY_LIST_IBM = 103075;
  GL_FOG_COORDINATE_ARRAY_LIST_IBM = 103076;
  GL_SECONDARY_COLOR_ARRAY_LIST_IBM = 103077;
  GL_VERTEX_ARRAY_LIST_STRIDE_IBM = 103080;
  GL_NORMAL_ARRAY_LIST_STRIDE_IBM = 103081;
  GL_COLOR_ARRAY_LIST_STRIDE_IBM = 103082;
  GL_INDEX_ARRAY_LIST_STRIDE_IBM = 103083;
  GL_TEXTURE_COORD_ARRAY_LIST_STRIDE_IBM = 103084;
  GL_EDGE_FLAG_ARRAY_LIST_STRIDE_IBM = 103085;
  GL_FOG_COORDINATE_ARRAY_LIST_STRIDE_IBM = 103086;
  GL_SECONDARY_COLOR_ARRAY_LIST_STRIDE_IBM = 103087;

  // GL_INGR_color_clamp
  GL_RED_MIN_CLAMP_INGR = $8560;
  GL_GREEN_MIN_CLAMP_INGR = $8561;
  GL_BLUE_MIN_CLAMP_INGR = $8562;
  GL_ALPHA_MIN_CLAMP_INGR = $8563;
  GL_RED_MAX_CLAMP_INGR = $8564;
  GL_GREEN_MAX_CLAMP_INGR = $8565;
  GL_BLUE_MAX_CLAMP_INGR = $8566;
  GL_ALPHA_MAX_CLAMP_INGR = $8567;

  // GL_INGR_interlace_read
  GL_INTERLACE_READ_INGR = $8568;

  // GL_INTEL_parallel_arrays
  GL_PARALLEL_ARRAYS_INTEL = $83F4;
  GL_VERTEX_ARRAY_PARALLEL_POINTERS_INTEL = $83F5;
  GL_NORMAL_ARRAY_PARALLEL_POINTERS_INTEL = $83F6;
  GL_COLOR_ARRAY_PARALLEL_POINTERS_INTEL = $83F7;
  GL_TEXTURE_COORD_ARRAY_PARALLEL_POINTERS_INTEL = $83F8;

  // GL_NV_copy_depth_to_color
  GL_DEPTH_STENCIL_TO_RGBA_NV = $886E;
  GL_DEPTH_STENCIL_TO_BGRA_NV = $886F;

  // GL_NV_depth_clamp
  GL_DEPTH_CLAMP_NV = $864F;

  // GL_NV_evaluators
  GL_EVAL_2D_NV = $86C0;
  GL_EVAL_TRIANGULAR_2D_NV = $86C1;
  GL_MAP_TESSELLATION_NV = $86C2;
  GL_MAP_ATTRIB_U_ORDER_NV = $86C3;
  GL_MAP_ATTRIB_V_ORDER_NV = $86C4;
  GL_EVAL_FRACTIONAL_TESSELLATION_NV = $86C5;
  GL_EVAL_VERTEX_ATTRIB0_NV = $86C6;
  GL_EVAL_VERTEX_ATTRIB1_NV = $86C7;
  GL_EVAL_VERTEX_ATTRIB2_NV = $86C8;
  GL_EVAL_VERTEX_ATTRIB3_NV = $86C9;
  GL_EVAL_VERTEX_ATTRIB4_NV = $86CA;
  GL_EVAL_VERTEX_ATTRIB5_NV = $86CB;
  GL_EVAL_VERTEX_ATTRIB6_NV = $86CC;
  GL_EVAL_VERTEX_ATTRIB7_NV = $86CD;
  GL_EVAL_VERTEX_ATTRIB8_NV = $86CE;
  GL_EVAL_VERTEX_ATTRIB9_NV = $86CF;
  GL_EVAL_VERTEX_ATTRIB10_NV = $86D0;
  GL_EVAL_VERTEX_ATTRIB11_NV = $86D1;
  GL_EVAL_VERTEX_ATTRIB12_NV = $86D2;
  GL_EVAL_VERTEX_ATTRIB13_NV = $86D3;
  GL_EVAL_VERTEX_ATTRIB14_NV = $86D4;
  GL_EVAL_VERTEX_ATTRIB15_NV = $86D5;
  GL_MAX_MAP_TESSELLATION_NV = $86D6;
  GL_MAX_RATIONAL_EVAL_ORDER_NV = $86D7;

  // GL_NV_fence
  GL_ALL_COMPLETED_NV = $84F2;
  GL_FENCE_STATUS_NV = $84F3;
  GL_FENCE_CONDITION_NV = $84F4;

  // GL_NV_float_buffer
  GL_FLOAT_R_NV = $8880;
  GL_FLOAT_RG_NV = $8881;
  GL_FLOAT_RGB_NV = $8882;
  GL_FLOAT_RGBA_NV = $8883;
  GL_FLOAT_R16_NV = $8884;
  GL_FLOAT_R32_NV = $8885;
  GL_FLOAT_RG16_NV = $8886;
  GL_FLOAT_RG32_NV = $8887;
  GL_FLOAT_RGB16_NV = $8888;
  GL_FLOAT_RGB32_NV = $8889;
  GL_FLOAT_RGBA16_NV = $888A;
  GL_FLOAT_RGBA32_NV = $888B;
  GL_TEXTURE_FLOAT_COMPONENTS_NV = $888C;
  GL_FLOAT_CLEAR_COLOR_VALUE_NV = $888D;
  GL_FLOAT_RGBA_MODE_NV = $888E;

  // GL_NV_fog_distance
  GL_FOG_DISTANCE_MODE_NV = $855A;
  GL_EYE_RADIAL_NV = $855B;
  GL_EYE_PLANE_ABSOLUTE_NV = $855C;

  // GL_NV_fragment_program
  GL_MAX_FRAGMENT_PROGRAM_LOCAL_PARAMETERS_NV = $8868;
  GL_FRAGMENT_PROGRAM_NV = $8870;
  GL_MAX_TEXTURE_COORDS_NV = $8871;
  GL_MAX_TEXTURE_IMAGE_UNITS_NV = $8872;
  GL_FRAGMENT_PROGRAM_BINDING_NV = $8873;
  GL_PROGRAM_ERROR_STRING_NV = $8874;

  // GL_NV_half_float
  GL_HALF_FLOAT_NV = $140B;

  // GL_NV_light_max_exponent
  GL_MAX_SHININESS_NV = $8504;
  GL_MAX_SPOT_EXPONENT_NV = $8505;

  // GL_NV_multisample_filter_hint
  GL_MULTISAMPLE_FILTER_HINT_NV = $8534;

  // GL_NV_occlusion_query
  GL_PIXEL_COUNTER_BITS_NV = $8864;
  GL_CURRENT_OCCLUSION_QUERY_ID_NV = $8865;
  GL_PIXEL_COUNT_NV = $8866;
  GL_PIXEL_COUNT_AVAILABLE_NV = $8867;

  // GL_NV_packed_depth_stencil
  GL_DEPTH_STENCIL_NV = $84F9;
  GL_UNSIGNED_INT_24_8_NV = $84FA;

  // GL_NV_pixel_data_range
  GL_WRITE_PIXEL_DATA_RANGE_NV = $8878;
  GL_READ_PIXEL_DATA_RANGE_NV = $8879;
  GL_WRITE_PIXEL_DATA_RANGE_LENGTH_NV = $887A;
  GL_READ_PIXEL_DATA_RANGE_LENGTH_NV = $887B;
  GL_WRITE_PIXEL_DATA_RANGE_POINTER_NV = $887C;
  GL_READ_PIXEL_DATA_RANGE_POINTER_NV = $887D;

  // GL_NV_point_sprite
  GL_POINT_SPRITE_NV = $8861;
  GL_COORD_REPLACE_NV = $8862;
  GL_POINT_SPRITE_R_MODE_NV = $8863;

  // GL_NV_primitive_restart
  GL_PRIMITIVE_RESTART_NV = $8558;
  GL_PRIMITIVE_RESTART_INDEX_NV = $8559;

  // GL_NV_register_combiners
  GL_REGISTER_COMBINERS_NV = $8522;
  GL_VARIABLE_A_NV = $8523;
  GL_VARIABLE_B_NV = $8524;
  GL_VARIABLE_C_NV = $8525;
  GL_VARIABLE_D_NV = $8526;
  GL_VARIABLE_E_NV = $8527;
  GL_VARIABLE_F_NV = $8528;
  GL_VARIABLE_G_NV = $8529;
  GL_CONSTANT_COLOR0_NV = $852A;
  GL_CONSTANT_COLOR1_NV = $852B;
  GL_PRIMARY_COLOR_NV = $852C;
  GL_SECONDARY_COLOR_NV = $852D;
  GL_SPARE0_NV = $852E;
  GL_SPARE1_NV = $852F;
  GL_DISCARD_NV = $8530;
  GL_E_TIMES_F_NV = $8531;
  GL_SPARE0_PLUS_SECONDARY_COLOR_NV = $8532;
  GL_UNSIGNED_IDENTITY_NV = $8536;
  GL_UNSIGNED_INVERT_NV = $8537;
  GL_EXPAND_NORMAL_NV = $8538;
  GL_EXPAND_NEGATE_NV = $8539;
  GL_HALF_BIAS_NORMAL_NV = $853A;
  GL_HALF_BIAS_NEGATE_NV = $853B;
  GL_SIGNED_IDENTITY_NV = $853C;
  GL_SIGNED_NEGATE_NV = $853D;
  GL_SCALE_BY_TWO_NV = $853E;
  GL_SCALE_BY_FOUR_NV = $853F;
  GL_SCALE_BY_ONE_HALF_NV = $8540;
  GL_BIAS_BY_NEGATIVE_ONE_HALF_NV = $8541;
  GL_COMBINER_INPUT_NV = $8542;
  GL_COMBINER_MAPPING_NV = $8543;
  GL_COMBINER_COMPONENT_USAGE_NV = $8544;
  GL_COMBINER_AB_DOT_PRODUCT_NV = $8545;
  GL_COMBINER_CD_DOT_PRODUCT_NV = $8546;
  GL_COMBINER_MUX_SUM_NV = $8547;
  GL_COMBINER_SCALE_NV = $8548;
  GL_COMBINER_BIAS_NV = $8549;
  GL_COMBINER_AB_OUTPUT_NV = $854A;
  GL_COMBINER_CD_OUTPUT_NV = $854B;
  GL_COMBINER_SUM_OUTPUT_NV = $854C;
  GL_MAX_GENERAL_COMBINERS_NV = $854D;
  GL_NUM_GENERAL_COMBINERS_NV = $854E;
  GL_COLOR_SUM_CLAMP_NV = $854F;
  GL_COMBINER0_NV = $8550;
  GL_COMBINER1_NV = $8551;
  GL_COMBINER2_NV = $8552;
  GL_COMBINER3_NV = $8553;
  GL_COMBINER4_NV = $8554;
  GL_COMBINER5_NV = $8555;
  GL_COMBINER6_NV = $8556;
  GL_COMBINER7_NV = $8557;

  // GL_NV_register_combiners2
  GL_PER_STAGE_CONSTANTS_NV = $8535;

  // GL_NV_texgen_emboss
  GL_EMBOSS_LIGHT_NV = $855D;
  GL_EMBOSS_CONSTANT_NV = $855E;
  GL_EMBOSS_MAP_NV = $855F;

  // GL_NV_texgen_reflection
  GL_NORMAL_MAP_NV = $8511;
  GL_REFLECTION_MAP_NV = $8512;

  // GL_NV_texture_env_combine4
  GL_COMBINE4_NV = $8503;
  GL_SOURCE3_RGB_NV = $8583;
  GL_SOURCE3_ALPHA_NV = $858B;
  GL_OPERAND3_RGB_NV = $8593;
  GL_OPERAND3_ALPHA_NV = $859B;

  // GL_NV_texture_expand_normal
  GL_TEXTURE_UNSIGNED_REMAP_MODE_NV = $888F;

  // GL_NV_texture_rectangle
  GL_TEXTURE_RECTANGLE_NV = $84F5;
  GL_TEXTURE_BINDING_RECTANGLE_NV = $84F6;
  GL_PROXY_TEXTURE_RECTANGLE_NV = $84F7;
  GL_MAX_RECTANGLE_TEXTURE_SIZE_NV = $84F8;

  // GL_NV_texture_shader
  GL_OFFSET_TEXTURE_RECTANGLE_NV = $864C;
  GL_OFFSET_TEXTURE_RECTANGLE_SCALE_NV = $864D;
  GL_DOT_PRODUCT_TEXTURE_RECTANGLE_NV = $864E;
  GL_RGBA_UNSIGNED_DOT_PRODUCT_MAPPING_NV = $86D9;
  GL_UNSIGNED_INT_S8_S8_8_8_NV = $86DA;
  GL_UNSIGNED_INT_8_8_S8_S8_REV_NV = $86DB;
  GL_DSDT_MAG_INTENSITY_NV = $86DC;
  GL_SHADER_CONSISTENT_NV = $86DD;
  GL_TEXTURE_SHADER_NV = $86DE;
  GL_SHADER_OPERATION_NV = $86DF;
  GL_CULL_MODES_NV = $86E0;
  GL_OFFSET_TEXTURE_MATRIX_NV = $86E1;
  GL_OFFSET_TEXTURE_SCALE_NV = $86E2;
  GL_OFFSET_TEXTURE_BIAS_NV = $86E3;
  GL_OFFSET_TEXTURE_2D_MATRIX_NV = GL_OFFSET_TEXTURE_MATRIX_NV;
  GL_OFFSET_TEXTURE_2D_SCALE_NV = GL_OFFSET_TEXTURE_SCALE_NV;
  GL_OFFSET_TEXTURE_2D_BIAS_NV = GL_OFFSET_TEXTURE_BIAS_NV;
  GL_PREVIOUS_TEXTURE_INPUT_NV = $86E4;
  GL_CONST_EYE_NV = $86E5;
  GL_PASS_THROUGH_NV = $86E6;
  GL_CULL_FRAGMENT_NV = $86E7;
  GL_OFFSET_TEXTURE_2D_NV = $86E8;
  GL_DEPENDENT_AR_TEXTURE_2D_NV = $86E9;
  GL_DEPENDENT_GB_TEXTURE_2D_NV = $86EA;
  GL_DOT_PRODUCT_NV = $86EC;
  GL_DOT_PRODUCT_DEPTH_REPLACE_NV = $86ED;
  GL_DOT_PRODUCT_TEXTURE_2D_NV = $86EE;
  GL_DOT_PRODUCT_TEXTURE_CUBE_MAP_NV = $86F0;
  GL_DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV = $86F1;
  GL_DOT_PRODUCT_REFLECT_CUBE_MAP_NV = $86F2;
  GL_DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV = $86F3;
  GL_HILO_NV = $86F4;
  GL_DSDT_NV = $86F5;
  GL_DSDT_MAG_NV = $86F6;
  GL_DSDT_MAG_VIB_NV = $86F7;
  GL_HILO16_NV = $86F8;
  GL_SIGNED_HILO_NV = $86F9;
  GL_SIGNED_HILO16_NV = $86FA;
  GL_SIGNED_RGBA_NV = $86FB;
  GL_SIGNED_RGBA8_NV = $86FC;
  GL_SIGNED_RGB_NV = $86FE;
  GL_SIGNED_RGB8_NV = $86FF;
  GL_SIGNED_LUMINANCE_NV = $8701;
  GL_SIGNED_LUMINANCE8_NV = $8702;
  GL_SIGNED_LUMINANCE_ALPHA_NV = $8703;
  GL_SIGNED_LUMINANCE8_ALPHA8_NV = $8704;
  GL_SIGNED_ALPHA_NV = $8705;
  GL_SIGNED_ALPHA8_NV = $8706;
  GL_SIGNED_INTENSITY_NV = $8707;
  GL_SIGNED_INTENSITY8_NV = $8708;
  GL_DSDT8_NV = $8709;
  GL_DSDT8_MAG8_NV = $870A;
  GL_DSDT8_MAG8_INTENSITY8_NV = $870B;
  GL_SIGNED_RGB_UNSIGNED_ALPHA_NV = $870C;
  GL_SIGNED_RGB8_UNSIGNED_ALPHA8_NV = $870D;
  GL_HI_SCALE_NV = $870E;
  GL_LO_SCALE_NV = $870F;
  GL_DS_SCALE_NV = $8710;
  GL_DT_SCALE_NV = $8711;
  GL_MAGNITUDE_SCALE_NV = $8712;
  GL_VIBRANCE_SCALE_NV = $8713;
  GL_HI_BIAS_NV = $8714;
  GL_LO_BIAS_NV = $8715;
  GL_DS_BIAS_NV = $8716;
  GL_DT_BIAS_NV = $8717;
  GL_MAGNITUDE_BIAS_NV = $8718;
  GL_VIBRANCE_BIAS_NV = $8719;
  GL_TEXTURE_BORDER_VALUES_NV = $871A;
  GL_TEXTURE_HI_SIZE_NV = $871B;
  GL_TEXTURE_LO_SIZE_NV = $871C;
  GL_TEXTURE_DS_SIZE_NV = $871D;
  GL_TEXTURE_DT_SIZE_NV = $871E;
  GL_TEXTURE_MAG_SIZE_NV = $871F;

  // GL_NV_texture_shader2
  GL_DOT_PRODUCT_TEXTURE_3D_NV = $86EF;

  // GL_NV_texture_shader3
  GL_OFFSET_PROJECTIVE_TEXTURE_2D_NV = $8850;
  GL_OFFSET_PROJECTIVE_TEXTURE_2D_SCALE_NV = $8851;
  GL_OFFSET_PROJECTIVE_TEXTURE_RECTANGLE_NV = $8852;
  GL_OFFSET_PROJECTIVE_TEXTURE_RECTANGLE_SCALE_NV = $8853;
  GL_OFFSET_HILO_TEXTURE_2D_NV = $8854;
  GL_OFFSET_HILO_TEXTURE_RECTANGLE_NV = $8855;
  GL_OFFSET_HILO_PROJECTIVE_TEXTURE_2D_NV = $8856;
  GL_OFFSET_HILO_PROJECTIVE_TEXTURE_RECTANGLE_NV = $8857;
  GL_DEPENDENT_HILO_TEXTURE_2D_NV = $8858;
  GL_DEPENDENT_RGB_TEXTURE_3D_NV = $8859;
  GL_DEPENDENT_RGB_TEXTURE_CUBE_MAP_NV = $885A;
  GL_DOT_PRODUCT_PASS_THROUGH_NV = $885B;
  GL_DOT_PRODUCT_TEXTURE_1D_NV = $885C;
  GL_DOT_PRODUCT_AFFINE_DEPTH_REPLACE_NV = $885D;
  GL_HILO8_NV = $885E;
  GL_SIGNED_HILO8_NV = $885F;
  GL_FORCE_BLUE_TO_ONE_NV = $8860;

  // GL_NV_vertex_array_range
  GL_VERTEX_ARRAY_RANGE_NV = $851D;
  GL_VERTEX_ARRAY_RANGE_LENGTH_NV = $851E;
  GL_VERTEX_ARRAY_RANGE_VALID_NV = $851F;
  GL_MAX_VERTEX_ARRAY_RANGE_ELEMENT_NV = $8520;
  GL_VERTEX_ARRAY_RANGE_POINTER_NV = $8521;

  // GL_NV_vertex_array_range2
  GL_VERTEX_ARRAY_RANGE_WITHOUT_FLUSH_NV = $8533;

  // GL_NV_vertex_program
  GL_VERTEX_PROGRAM_NV = $8620;
  GL_VERTEX_STATE_PROGRAM_NV = $8621;
  GL_ATTRIB_ARRAY_SIZE_NV = $8623;
  GL_ATTRIB_ARRAY_STRIDE_NV = $8624;
  GL_ATTRIB_ARRAY_TYPE_NV = $8625;
  GL_CURRENT_ATTRIB_NV = $8626;
  GL_PROGRAM_LENGTH_NV = $8627;
  GL_PROGRAM_STRING_NV = $8628;
  GL_MODELVIEW_PROJECTION_NV = $8629;
  GL_IDENTITY_NV = $862A;
  GL_INVERSE_NV = $862B;
  GL_TRANSPOSE_NV = $862C;
  GL_INVERSE_TRANSPOSE_NV = $862D;
  GL_MAX_TRACK_MATRIX_STACK_DEPTH_NV = $862E;
  GL_MAX_TRACK_MATRICES_NV = $862F;
  GL_MATRIX0_NV = $8630;
  GL_MATRIX1_NV = $8631;
  GL_MATRIX2_NV = $8632;
  GL_MATRIX3_NV = $8633;
  GL_MATRIX4_NV = $8634;
  GL_MATRIX5_NV = $8635;
  GL_MATRIX6_NV = $8636;
  GL_MATRIX7_NV = $8637;
  GL_CURRENT_MATRIX_STACK_DEPTH_NV = $8640;
  GL_CURRENT_MATRIX_NV = $8641;
  GL_VERTEX_PROGRAM_POINT_SIZE_NV = $8642;
  GL_VERTEX_PROGRAM_TWO_SIDE_NV = $8643;
  GL_PROGRAM_PARAMETER_NV = $8644;
  GL_ATTRIB_ARRAY_POINTER_NV = $8645;
  GL_PROGRAM_TARGET_NV = $8646;
  GL_PROGRAM_RESIDENT_NV = $8647;
  GL_TRACK_MATRIX_NV = $8648;
  GL_TRACK_MATRIX_TRANSFORM_NV = $8649;
  GL_VERTEX_PROGRAM_BINDING_NV = $864A;
  GL_PROGRAM_ERROR_POSITION_NV = $864B;
  GL_VERTEX_ATTRIB_ARRAY0_NV = $8650;
  GL_VERTEX_ATTRIB_ARRAY1_NV = $8651;
  GL_VERTEX_ATTRIB_ARRAY2_NV = $8652;
  GL_VERTEX_ATTRIB_ARRAY3_NV = $8653;
  GL_VERTEX_ATTRIB_ARRAY4_NV = $8654;
  GL_VERTEX_ATTRIB_ARRAY5_NV = $8655;
  GL_VERTEX_ATTRIB_ARRAY6_NV = $8656;
  GL_VERTEX_ATTRIB_ARRAY7_NV = $8657;
  GL_VERTEX_ATTRIB_ARRAY8_NV = $8658;
  GL_VERTEX_ATTRIB_ARRAY9_NV = $8659;
  GL_VERTEX_ATTRIB_ARRAY10_NV = $865A;
  GL_VERTEX_ATTRIB_ARRAY11_NV = $865B;
  GL_VERTEX_ATTRIB_ARRAY12_NV = $865C;
  GL_VERTEX_ATTRIB_ARRAY13_NV = $865D;
  GL_VERTEX_ATTRIB_ARRAY14_NV = $865E;
  GL_VERTEX_ATTRIB_ARRAY15_NV = $865F;
  GL_MAP1_VERTEX_ATTRIB0_4_NV = $8660;
  GL_MAP1_VERTEX_ATTRIB1_4_NV = $8661;
  GL_MAP1_VERTEX_ATTRIB2_4_NV = $8662;
  GL_MAP1_VERTEX_ATTRIB3_4_NV = $8663;
  GL_MAP1_VERTEX_ATTRIB4_4_NV = $8664;
  GL_MAP1_VERTEX_ATTRIB5_4_NV = $8665;
  GL_MAP1_VERTEX_ATTRIB6_4_NV = $8666;
  GL_MAP1_VERTEX_ATTRIB7_4_NV = $8667;
  GL_MAP1_VERTEX_ATTRIB8_4_NV = $8668;
  GL_MAP1_VERTEX_ATTRIB9_4_NV = $8669;
  GL_MAP1_VERTEX_ATTRIB10_4_NV = $866A;
  GL_MAP1_VERTEX_ATTRIB11_4_NV = $866B;
  GL_MAP1_VERTEX_ATTRIB12_4_NV = $866C;
  GL_MAP1_VERTEX_ATTRIB13_4_NV = $866D;
  GL_MAP1_VERTEX_ATTRIB14_4_NV = $866E;
  GL_MAP1_VERTEX_ATTRIB15_4_NV = $866F;
  GL_MAP2_VERTEX_ATTRIB0_4_NV = $8670;
  GL_MAP2_VERTEX_ATTRIB1_4_NV = $8671;
  GL_MAP2_VERTEX_ATTRIB2_4_NV = $8672;
  GL_MAP2_VERTEX_ATTRIB3_4_NV = $8673;
  GL_MAP2_VERTEX_ATTRIB4_4_NV = $8674;
  GL_MAP2_VERTEX_ATTRIB5_4_NV = $8675;
  GL_MAP2_VERTEX_ATTRIB6_4_NV = $8676;
  GL_MAP2_VERTEX_ATTRIB7_4_NV = $8677;
  GL_MAP2_VERTEX_ATTRIB8_4_NV = $8678;
  GL_MAP2_VERTEX_ATTRIB9_4_NV = $8679;
  GL_MAP2_VERTEX_ATTRIB10_4_NV = $867A;
  GL_MAP2_VERTEX_ATTRIB11_4_NV = $867B;
  GL_MAP2_VERTEX_ATTRIB12_4_NV = $867C;
  GL_MAP2_VERTEX_ATTRIB13_4_NV = $867D;
  GL_MAP2_VERTEX_ATTRIB14_4_NV = $867E;
  GL_MAP2_VERTEX_ATTRIB15_4_NV = $867F;

  // GL_NV_fragment_program2 and GL_NV_vertex_program2_option
  GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV = $88F4;
  GL_MAX_PROGRAM_CALL_DEPTH_NV = $88F5;

  // GL_NV_fragment_program2
  GL_MAX_PROGRAM_IF_DEPTH_NV = $88F6;
  GL_MAX_PROGRAM_LOOP_DEPTH_NV = $88F7;
  GL_MAX_PROGRAM_LOOP_COUNT_NV = $88F8;

  // GL_NV_vertex_program3
  MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB = $8B4C;

  // GL_NV_depth_buffer_float
  GL_FLOAT_32_UNSIGNED_INT_24_8_REV_NV = $8DAD;
  GL_DEPTH_BUFFER_FLOAT_MODE_NV = $8DAF;

  // GL_NV_framebuffer_multisample_coverage
  GL_RENDERBUFFER_COVERAGE_SAMPLES_NV = $8CAB;
  GL_RENDERBUFFER_COLOR_SAMPLES_NV = $8E10;

  // GL_NV_geometry_program4
  GL_GEOMETRY_PROGRAM_NV = $8C26;
  GL_MAX_PROGRAM_OUTPUT_VERTICES_NV = $8C27;
  GL_MAX_PROGRAM_TOTAL_OUTPUT_COMPONENTS_NV = $8C28;

  // GL_NV_gpu_program4
  GL_PROGRAM_ATTRIB_COMPONENTS_NV = $8906;
  GL_PROGRAM_RESULT_COMPONENTS_NV = $8907;
  GL_MAX_PROGRAM_ATTRIB_COMPONENTS_NV = $8908;
  GL_MAX_PROGRAM_RESULT_COMPONENTS_NV = $8909;
  GL_MAX_PROGRAM_GENERIC_ATTRIBS_NV = $8DA5;
  GL_MAX_PROGRAM_GENERIC_RESULTS_NV = $8DA6;

  // GL_NV_parameter_buffer_object
  GL_MAX_PROGRAM_PARAMETER_BUFFER_BINDINGS_NV = $8DA0;
  GL_MAX_PROGRAM_PARAMETER_BUFFER_SIZE_NV = $8DA1;
  GL_VERTEX_PROGRAM_PARAMETER_BUFFER_NV = $8DA2;
  GL_GEOMETRY_PROGRAM_PARAMETER_BUFFER_NV = $8DA3;
  GL_FRAGMENT_PROGRAM_PARAMETER_BUFFER_NV = $8DA4;

  // GL_NV_transform_feedback
  GL_TRANSFORM_FEEDBACK_BUFFER_NV = $8C8E;
  GL_TRANSFORM_FEEDBACK_BUFFER_START_NV = $8C84;
  GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_NV = $8C85;
  GL_TRANSFORM_FEEDBACK_RECORD_NV = $8C86;
  GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_NV = $8C8F;
  GL_INTERLEAVED_ATTRIBS_NV = $8C8C;
  GL_SEPARATE_ATTRIBS_NV = $8C8D;
  GL_PRIMITIVES_GENERATED_NV = $8C87;
  GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_NV = $8C88;
  GL_RASTERIZER_DISCARD_NV = $8C89;
  GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS_NV = $8C8A;
  GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_NV = $8C8B;
  GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_NV = $8C80;
  GL_TRANSFORM_FEEDBACK_ATTRIBS_NV = $8C7E;
  GL_ACTIVE_VARYINGS_NV = $8C81;
  GL_ACTIVE_VARYING_MAX_LENGTH_NV = $8C82;
  GL_TRANSFORM_FEEDBACK_VARYINGS_NV = $8C83;
  GL_TRANSFORM_FEEDBACK_BUFFER_MODE_NV = $8C7F;
  GL_BACK_PRIMARY_COLOR_NV = $8C77;
  GL_BACK_SECONDARY_COLOR_NV = $8C78;
  GL_TEXTURE_COORD_NV = $8C79;
  GL_CLIP_DISTANCE_NV = $8C7A;
  GL_VERTEX_ID_NV = $8C7B;
  GL_PRIMITIVE_ID_NV = $8C7C;
  GL_GENERIC_ATTRIB_NV = $8C7D;
  GL_LAYER_NV = $8DAA;
  GL_NEXT_BUFFER_NV = -2;
  GL_SKIP_COMPONENTS4_NV = -3;
  GL_SKIP_COMPONENTS3_NV = -4;
  GL_SKIP_COMPONENTS2_NV = -5;
  GL_SKIP_COMPONENTS1_NV = -6;

  // GL_NV_conditional_render
  GL_QUERY_WAIT_NV = $8E13;
  GL_QUERY_NO_WAIT_NV = $8E14;
  GL_QUERY_BY_REGION_WAIT_NV = $8E15;
  GL_QUERY_BY_REGION_NO_WAIT_NV = $8E16;

  // GL_NV_conservative_raster
  GL_CONSERVATIVE_RASTERIZATION_NV = $9346;
  GL_SUBPIXEL_PRECISION_BIAS_X_BITS_NV = $9347;
  GL_SUBPIXEL_PRECISION_BIAS_Y_BITS_NV = $9348;
  GL_MAX_SUBPIXEL_PRECISION_BIAS_BITS_NV = $9349;

  // GL_NV_conservative_raster_dilate
  GL_CONSERVATIVE_RASTER_DILATE_NV = $9379;
  GL_CONSERVATIVE_RASTER_DILATE_RANGE_NV = $937A;
  GL_CONSERVATIVE_RASTER_DILATE_GRANULARITY_NV = $937B;

  // GL_NV_present_video
  GL_FRAME_NV = $8E26;
  GL_FIELDS_NV = $8E27;
  GL_CURRENT_TIME_NV = $8E28;
  GL_NUM_FILL_STREAMS_NV = $8E29;
  GL_PRESENT_TIME_NV = $8E2A;
  GL_PRESENT_DURATION_NV = $8E2B;

  // GL_NV_explicit_multisample
  GL_SAMPLE_POSITION_NV = $8E50;
  GL_SAMPLE_MASK_NV = $8E51;
  GL_SAMPLE_MASK_VALUE_NV = $8E52;
  GL_TEXTURE_BINDING_RENDERBUFFER_NV = $8E53;
  GL_TEXTURE_RENDERBUFFER_DATA_STORE_BINDING_NV = $8E54;
  GL_TEXTURE_RENDERBUFFER_NV = $8E55;
  GL_SAMPLER_RENDERBUFFER_NV = $8E56;
  GL_INT_SAMPLER_RENDERBUFFER_NV = $8E57;
  GL_UNSIGNED_INT_SAMPLER_RENDERBUFFER_NV = $8E58;
  GL_MAX_SAMPLE_MASK_WORDS_NV = $8E59;

  // GL_NV_transform_feedback2
  GL_TRANSFORM_FEEDBACK_NV = $8E22;
  GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED_NV = $8E23;
  GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE_NV = $8E24;
  GL_TRANSFORM_FEEDBACK_BINDING_NV = $8E25;

  // GL_NV_video_capture
  GL_VIDEO_BUFFER_NV = $9020;
  GL_VIDEO_BUFFER_BINDING_NV = $9021;
  GL_FIELD_UPPER_NV = $9022;
  GL_FIELD_LOWER_NV = $9023;
  GL_NUM_VIDEO_CAPTURE_STREAMS_NV = $9024;
  GL_NEXT_VIDEO_CAPTURE_BUFFER_STATUS_NV = $9025;
  GL_VIDEO_CAPTURE_TO_422_SUPPORTED_NV = $9026;
  GL_LAST_VIDEO_CAPTURE_STATUS_NV = $9027;
  GL_VIDEO_BUFFER_PITCH_NV = $9028;
  GL_VIDEO_COLOR_CONVERSION_MATRIX_NV = $9029;
  GL_VIDEO_COLOR_CONVERSION_MAX_NV = $902A;
  GL_VIDEO_COLOR_CONVERSION_MIN_NV = $902B;
  GL_VIDEO_COLOR_CONVERSION_OFFSET_NV = $902C;
  GL_VIDEO_BUFFER_INTERNAL_FORMAT_NV = $902D;
  GL_PARTIAL_SUCCESS_NV = $902E;
  GL_SUCCESS_NV = $902F;
  GL_FAILURE_NV = $9030;
  GL_YCBYCR8_422_NV = $9031;
  GL_YCBAYCR8A_4224_NV = $9032;
  GL_Z6Y10Z6CB10Z6Y10Z6CR10_422_NV = $9033;
  GL_Z6Y10Z6CB10Z6A10Z6Y10Z6CR10Z6A10_4224_NV = $9034;
  GL_Z4Y12Z4CB12Z4Y12Z4CR12_422_NV = $9035;
  GL_Z4Y12Z4CB12Z4A12Z4Y12Z4CR12Z4A12_4224_NV = $9036;
  GL_Z4Y12Z4CB12Z4CR12_444_NV = $9037;
  GL_VIDEO_CAPTURE_FRAME_WIDTH_NV = $9038;
  GL_VIDEO_CAPTURE_FRAME_HEIGHT_NV = $9039;
  GL_VIDEO_CAPTURE_FIELD_UPPER_HEIGHT_NV = $903A;
  GL_VIDEO_CAPTURE_FIELD_LOWER_HEIGHT_NV = $903B;
  GL_VIDEO_CAPTURE_SURFACE_ORIGIN_NV = $903C;

  // GL_NV_shader_buffer_load
  GL_BUFFER_GPU_ADDRESS_NV = $8F1D;
  GL_GPU_ADDRESS_NV = $8F34;
  GL_MAX_SHADER_BUFFER_ADDRESS_NV = $8F35;

  // GL_NV_vertex_buffer_unified_memory
  GL_VERTEX_ATTRIB_ARRAY_UNIFIED_NV = $8F1E;
  GL_ELEMENT_ARRAY_UNIFIED_NV = $8F1F;
  GL_VERTEX_ATTRIB_ARRAY_ADDRESS_NV = $8F20;
  GL_VERTEX_ARRAY_ADDRESS_NV = $8F21;
  GL_NORMAL_ARRAY_ADDRESS_NV = $8F22;
  GL_COLOR_ARRAY_ADDRESS_NV = $8F23;
  GL_INDEX_ARRAY_ADDRESS_NV = $8F24;
  GL_TEXTURE_COORD_ARRAY_ADDRESS_NV = $8F25;
  GL_EDGE_FLAG_ARRAY_ADDRESS_NV = $8F26;
  GL_SECONDARY_COLOR_ARRAY_ADDRESS_NV = $8F27;
  GL_FOG_COORD_ARRAY_ADDRESS_NV = $8F28;
  GL_ELEMENT_ARRAY_ADDRESS_NV = $8F29;
  GL_VERTEX_ATTRIB_ARRAY_LENGTH_NV = $8F2A;
  GL_VERTEX_ARRAY_LENGTH_NV = $8F2B;
  GL_NORMAL_ARRAY_LENGTH_NV = $8F2C;
  GL_COLOR_ARRAY_LENGTH_NV = $8F2D;
  GL_INDEX_ARRAY_LENGTH_NV = $8F2E;
  GL_TEXTURE_COORD_ARRAY_LENGTH_NV = $8F2F;
  GL_EDGE_FLAG_ARRAY_LENGTH_NV = $8F30;
  GL_SECONDARY_COLOR_ARRAY_LENGTH_NV = $8F31;
  GL_FOG_COORD_ARRAY_LENGTH_NV = $8F32;
  GL_ELEMENT_ARRAY_LENGTH_NV = $8F33;
  GL_DRAW_INDIRECT_UNIFIED_NV = $8F40;
  GL_DRAW_INDIRECT_ADDRESS_NV = $8F41;
  GL_DRAW_INDIRECT_LENGTH_NV = $8F42;

  // GL_NV_gpu_program5
  GL_MAX_GEOMETRY_PROGRAM_INVOCATIONS_NV = $8E5A;
  GL_MIN_FRAGMENT_INTERPOLATION_OFFSET_NV = $8E5B;
  GL_MAX_FRAGMENT_INTERPOLATION_OFFSET_NV = $8E5C;
  GL_FRAGMENT_PROGRAM_INTERPOLATION_OFFSET_BITS_NV = $8E5D;
  GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET_NV = $8E5E;
  GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET_NV = $8E5F;
  GL_MAX_PROGRAM_SUBROUTINE_PARAMETERS_NV = $8F44;
  GL_MAX_PROGRAM_SUBROUTINE_NUM_NV = $8F45;

  // GL_NV_gpu_shader5
  GL_INT64_NV = $140E;
  GL_UNSIGNED_INT64_NV = $140F;
  GL_INT8_NV = $8FE0;
  GL_INT8_VEC2_NV = $8FE1;
  GL_INT8_VEC3_NV = $8FE2;
  GL_INT8_VEC4_NV = $8FE3;
  GL_INT16_NV = $8FE4;
  GL_INT16_VEC2_NV = $8FE5;
  GL_INT16_VEC3_NV = $8FE6;
  GL_INT16_VEC4_NV = $8FE7;
  GL_INT64_VEC2_NV = $8FE9;
  GL_INT64_VEC3_NV = $8FEA;
  GL_INT64_VEC4_NV = $8FEB;
  GL_UNSIGNED_INT8_NV = $8FEC;
  GL_UNSIGNED_INT8_VEC2_NV = $8FED;
  GL_UNSIGNED_INT8_VEC3_NV = $8FEE;
  GL_UNSIGNED_INT8_VEC4_NV = $8FEF;
  GL_UNSIGNED_INT16_NV = $8FF0;
  GL_UNSIGNED_INT16_VEC2_NV = $8FF1;
  GL_UNSIGNED_INT16_VEC3_NV = $8FF2;
  GL_UNSIGNED_INT16_VEC4_NV = $8FF3;
  GL_UNSIGNED_INT64_VEC2_NV = $8FF5;
  GL_UNSIGNED_INT64_VEC3_NV = $8FF6;
  GL_UNSIGNED_INT64_VEC4_NV = $8FF7;
  GL_FLOAT16_NV = $8FF8;
  GL_FLOAT16_VEC2_NV = $8FF9;
  GL_FLOAT16_VEC3_NV = $8FFA;
  GL_FLOAT16_VEC4_NV = $8FFB;
  { reuse GL_PATCHES }

  // GL_NV_shader_buffer_store
  GL_SHADER_GLOBAL_ACCESS_BARRIER_BIT_NV = $00000010;
  { reuse GL_READ_WRITE }
  { reuse GL_WRITE_ONLY }

  // GL_NV_tessellation_program5
  GL_MAX_PROGRAM_PATCH_ATTRIBS_NV = $86D8;
  GL_TESS_CONTROL_PROGRAM_NV = $891E;
  GL_TESS_EVALUATION_PROGRAM_NV = $891F;
  GL_TESS_CONTROL_PROGRAM_PARAMETER_BUFFER_NV = $8C74;
  GL_TESS_EVALUATION_PROGRAM_PARAMETER_BUFFER_NV = $8C75;

  // GL_NV_vertex_attrib_integer_64bit
  { reuse GL_INT64_NV }
  { reuse GL_UNSIGNED_INT64_NV }

  // GL_NV_multisample_coverage
  GL_COVERAGE_SAMPLES_NV = $80A9;
  GL_COLOR_SAMPLES_NV = $8E20;

  // GL_NV_vdpau_interop
  GL_SURFACE_STATE_NV = $86EB;
  GL_SURFACE_REGISTERED_NV = $86FD;
  GL_SURFACE_MAPPED_NV = $8700;
  GL_WRITE_DISCARD_NV = $88BE;

  // GL_OML_interlace
  GL_INTERLACE_OML = $8980;
  GL_INTERLACE_READ_OML = $8981;

  // GL_OML_resample
  GL_PACK_RESAMPLE_OML = $8984;
  GL_UNPACK_RESAMPLE_OML = $8985;
  GL_RESAMPLE_REPLICATE_OML = $8986;
  GL_RESAMPLE_ZERO_FILL_OML = $8987;
  GL_RESAMPLE_AVERAGE_OML = $8988;
  GL_RESAMPLE_DECIMATE_OML = $8989;

  // GL_OML_subsample
  GL_FORMAT_SUBSAMPLE_24_24_OML = $8982;
  GL_FORMAT_SUBSAMPLE_244_244_OML = $8983;

  // GL_OVR_multiview
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_NUM_VIEWS_OVR = $9630;
  GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_BASE_VIEW_INDEX_OVR = $9632;
  GL_MAX_VIEWS_OVR = $9631;
  GL_FRAMEBUFFER_INCOMPLETE_VIEW_TARGETS_OVR  = $9633;

  // GL_PGI_misc_hints
  GL_PREFER_DOUBLEBUFFER_HINT_PGI = $1A1F8;
  GL_CONSERVE_MEMORY_HINT_PGI = $1A1FD;
  GL_RECLAIM_MEMORY_HINT_PGI = $1A1FE;
  GL_NATIVE_GRAPHICS_HANDLE_PGI = $1A202;
  GL_NATIVE_GRAPHICS_BEGIN_HINT_PGI = $1A203;
  GL_NATIVE_GRAPHICS_END_HINT_PGI = $1A204;
  GL_ALWAYS_FAST_HINT_PGI = $1A20C;
  GL_ALWAYS_SOFT_HINT_PGI = $1A20D;
  GL_ALLOW_DRAW_OBJ_HINT_PGI = $1A20E;
  GL_ALLOW_DRAW_WIN_HINT_PGI = $1A20F;
  GL_ALLOW_DRAW_FRG_HINT_PGI = $1A210;
  GL_ALLOW_DRAW_MEM_HINT_PGI = $1A211;
  GL_STRICT_DEPTHFUNC_HINT_PGI = $1A216;
  GL_STRICT_LIGHTING_HINT_PGI = $1A217;
  GL_STRICT_SCISSOR_HINT_PGI = $1A218;
  GL_FULL_STIPPLE_HINT_PGI = $1A219;
  GL_CLIP_NEAR_HINT_PGI = $1A220;
  GL_CLIP_FAR_HINT_PGI = $1A221;
  GL_WIDE_LINE_HINT_PGI = $1A222;
  GL_BACK_NORMALS_HINT_PGI = $1A223;

  // GL_PGI_vertex_hints
  GL_VERTEX_DATA_HINT_PGI = $1A22A;
  GL_VERTEX_CONSISTENT_HINT_PGI = $1A22B;
  GL_MATERIAL_SIDE_HINT_PGI = $1A22C;
  GL_MAX_VERTEX_HINT_PGI = $1A22D;
  GL_COLOR3_BIT_PGI = $00010000;
  GL_COLOR4_BIT_PGI = $00020000;
  GL_EDGEFLAG_BIT_PGI = $00040000;
  GL_INDEX_BIT_PGI = $00080000;
  GL_MAT_AMBIENT_BIT_PGI = $00100000;
  GL_MAT_AMBIENT_AND_DIFFUSE_BIT_PGI = $00200000;
  GL_MAT_DIFFUSE_BIT_PGI = $00400000;
  GL_MAT_EMISSION_BIT_PGI = $00800000;
  GL_MAT_COLOR_INDEXES_BIT_PGI = $01000000;
  GL_MAT_SHININESS_BIT_PGI = $02000000;
  GL_MAT_SPECULAR_BIT_PGI = $04000000;
  GL_NORMAL_BIT_PGI = $08000000;
  GL_TEXCOORD1_BIT_PGI = $10000000;
  GL_TEXCOORD2_BIT_PGI = $20000000;
  GL_TEXCOORD3_BIT_PGI = $40000000;
  GL_TEXCOORD4_BIT_PGI = $80000000;
  GL_VERTEX23_BIT_PGI = $00000004;
  GL_VERTEX4_BIT_PGI = $00000008;

  // GL_REND_screen_coordinates
  GL_SCREEN_COORDINATES_REND = $8490;
  GL_INVERTED_SCREEN_W_REND = $8491;

  // GL_S3_s3tc
  GL_RGB_S3TC = $83A0;
  GL_RGB4_S3TC = $83A1;
  GL_RGBA_S3TC = $83A2;
  GL_RGBA4_S3TC = $83A3;

  // GL_SGIS_detail_texture
  GL_DETAIL_TEXTURE_2D_SGIS = $8095;
  GL_DETAIL_TEXTURE_2D_BINDING_SGIS = $8096;
  GL_LINEAR_DETAIL_SGIS = $8097;
  GL_LINEAR_DETAIL_ALPHA_SGIS = $8098;
  GL_LINEAR_DETAIL_COLOR_SGIS = $8099;
  GL_DETAIL_TEXTURE_LEVEL_SGIS = $809A;
  GL_DETAIL_TEXTURE_MODE_SGIS = $809B;
  GL_DETAIL_TEXTURE_FUNC_POINTS_SGIS = $809C;

  // GL_SGIS_fog_function
  GL_FOG_FUNC_SGIS = $812A;
  GL_FOG_FUNC_POINTS_SGIS = $812B;
  GL_MAX_FOG_FUNC_POINTS_SGIS = $812C;

  // GL_SGIS_generate_mipmap
  GL_GENERATE_MIPMAP_SGIS = $8191;
  GL_GENERATE_MIPMAP_HINT_SGIS = $8192;

  // GL_SGIS_multisample
  GL_MULTISAMPLE_SGIS = $809D;
  GL_SAMPLE_ALPHA_TO_MASK_SGIS = $809E;
  GL_SAMPLE_ALPHA_TO_ONE_SGIS = $809F;
  GL_SAMPLE_MASK_SGIS = $80A0;
  GL_1PASS_SGIS = $80A1;
  GL_2PASS_0_SGIS = $80A2;
  GL_2PASS_1_SGIS = $80A3;
  GL_4PASS_0_SGIS = $80A4;
  GL_4PASS_1_SGIS = $80A5;
  GL_4PASS_2_SGIS = $80A6;
  GL_4PASS_3_SGIS = $80A7;
  GL_SAMPLE_BUFFERS_SGIS = $80A8;
  GL_SAMPLES_SGIS = $80A9;
  GL_SAMPLE_MASK_VALUE_SGIS = $80AA;
  GL_SAMPLE_MASK_INVERT_SGIS = $80AB;
  GL_SAMPLE_PATTERN_SGIS = $80AC;

  // GL_SGIS_pixel_texture
  GL_PIXEL_TEXTURE_SGIS = $8353;
  GL_PIXEL_FRAGMENT_RGB_SOURCE_SGIS = $8354;
  GL_PIXEL_FRAGMENT_ALPHA_SOURCE_SGIS = $8355;
  GL_PIXEL_GROUP_COLOR_SGIS = $8356;

  // GL_SGIS_point_line_texgen
  GL_EYE_DISTANCE_TO_POINT_SGIS = $81F0;
  GL_OBJECT_DISTANCE_TO_POINT_SGIS = $81F1;
  GL_EYE_DISTANCE_TO_LINE_SGIS = $81F2;
  GL_OBJECT_DISTANCE_TO_LINE_SGIS = $81F3;
  GL_EYE_POINT_SGIS = $81F4;
  GL_OBJECT_POINT_SGIS = $81F5;
  GL_EYE_LINE_SGIS = $81F6;
  GL_OBJECT_LINE_SGIS = $81F7;

  // GL_SGIS_point_parameters
  GL_POINT_SIZE_MIN_SGIS = $8126;
  GL_POINT_SIZE_MAX_SGIS = $8127;
  GL_POINT_FADE_THRESHOLD_SIZE_SGIS = $8128;
  GL_DISTANCE_ATTENUATION_SGIS = $8129;

  // GL_SGIS_sharpen_texture
  GL_LINEAR_SHARPEN_SGIS = $80AD;
  GL_LINEAR_SHARPEN_ALPHA_SGIS = $80AE;
  GL_LINEAR_SHARPEN_COLOR_SGIS = $80AF;
  GL_SHARPEN_TEXTURE_FUNC_POINTS_SGIS = $80B0;

  // GL_SGIS_texture4D
  GL_PACK_SKIP_VOLUMES_SGIS = $8130;
  GL_PACK_IMAGE_DEPTH_SGIS = $8131;
  GL_UNPACK_SKIP_VOLUMES_SGIS = $8132;
  GL_UNPACK_IMAGE_DEPTH_SGIS = $8133;
  GL_TEXTURE_4D_SGIS = $8134;
  GL_PROXY_TEXTURE_4D_SGIS = $8135;
  GL_TEXTURE_4DSIZE_SGIS = $8136;
  GL_TEXTURE_WRAP_Q_SGIS = $8137;
  GL_MAX_4D_TEXTURE_SIZE_SGIS = $8138;
  GL_TEXTURE_4D_BINDING_SGIS = $814F;

  // GL_SGIS_texture_color_mask
  GL_TEXTURE_COLOR_WRITEMASK_SGIS = $81EF;

  // GL_SGIS_texture_edge_clamp
  GL_CLAMP_TO_EDGE_SGIS = $812F;

  // GL_SGIS_texture_filter4
  GL_FILTER4_SGIS = $8146;
  GL_TEXTURE_FILTER4_SIZE_SGIS = $8147;

  // GL_SGIS_texture_lod
  GL_TEXTURE_MIN_LOD_SGIS = $813A;
  GL_TEXTURE_MAX_LOD_SGIS = $813B;
  GL_TEXTURE_BASE_LEVEL_SGIS = $813C;
  GL_TEXTURE_MAX_LEVEL_SGIS = $813D;

  // GL_SGIS_texture_select
  GL_DUAL_ALPHA4_SGIS = $8110;
  GL_DUAL_ALPHA8_SGIS = $8111;
  GL_DUAL_ALPHA12_SGIS = $8112;
  GL_DUAL_ALPHA16_SGIS = $8113;
  GL_DUAL_LUMINANCE4_SGIS = $8114;
  GL_DUAL_LUMINANCE8_SGIS = $8115;
  GL_DUAL_LUMINANCE12_SGIS = $8116;
  GL_DUAL_LUMINANCE16_SGIS = $8117;
  GL_DUAL_INTENSITY4_SGIS = $8118;
  GL_DUAL_INTENSITY8_SGIS = $8119;
  GL_DUAL_INTENSITY12_SGIS = $811A;
  GL_DUAL_INTENSITY16_SGIS = $811B;
  GL_DUAL_LUMINANCE_ALPHA4_SGIS = $811C;
  GL_DUAL_LUMINANCE_ALPHA8_SGIS = $811D;
  GL_QUAD_ALPHA4_SGIS = $811E;
  GL_QUAD_ALPHA8_SGIS = $811F;
  GL_QUAD_LUMINANCE4_SGIS = $8120;
  GL_QUAD_LUMINANCE8_SGIS = $8121;
  GL_QUAD_INTENSITY4_SGIS = $8122;
  GL_QUAD_INTENSITY8_SGIS = $8123;
  GL_DUAL_TEXTURE_SELECT_SGIS = $8124;
  GL_QUAD_TEXTURE_SELECT_SGIS = $8125;

  // GL_SGIX_async
  GL_ASYNC_MARKER_SGIX = $8329;

  // GL_SGIX_async_histogram
  GL_ASYNC_HISTOGRAM_SGIX = $832C;
  GL_MAX_ASYNC_HISTOGRAM_SGIX = $832D;

  // GL_SGIX_async_pixel
  GL_ASYNC_TEX_IMAGE_SGIX = $835C;
  GL_ASYNC_DRAW_PIXELS_SGIX = $835D;
  GL_ASYNC_READ_PIXELS_SGIX = $835E;
  GL_MAX_ASYNC_TEX_IMAGE_SGIX = $835F;
  GL_MAX_ASYNC_DRAW_PIXELS_SGIX = $8360;
  GL_MAX_ASYNC_READ_PIXELS_SGIX = $8361;

  // GL_SGIX_blend_alpha_minmax
  GL_ALPHA_MIN_SGIX = $8320;
  GL_ALPHA_MAX_SGIX = $8321;

  // GL_SGIX_calligraphic_fragment
  GL_CALLIGRAPHIC_FRAGMENT_SGIX = $8183;

  // GL_SGIX_clipmap
  GL_LINEAR_CLIPMAP_LINEAR_SGIX = $8170;
  GL_TEXTURE_CLIPMAP_CENTER_SGIX = $8171;
  GL_TEXTURE_CLIPMAP_FRAME_SGIX = $8172;
  GL_TEXTURE_CLIPMAP_OFFSET_SGIX = $8173;
  GL_TEXTURE_CLIPMAP_VIRTUAL_DEPTH_SGIX = $8174;
  GL_TEXTURE_CLIPMAP_LOD_OFFSET_SGIX = $8175;
  GL_TEXTURE_CLIPMAP_DEPTH_SGIX = $8176;
  GL_MAX_CLIPMAP_DEPTH_SGIX = $8177;
  GL_MAX_CLIPMAP_VIRTUAL_DEPTH_SGIX = $8178;
  GL_NEAREST_CLIPMAP_NEAREST_SGIX = $844D;
  GL_NEAREST_CLIPMAP_LINEAR_SGIX = $844E;
  GL_LINEAR_CLIPMAP_NEAREST_SGIX = $844F;

  // GL_SGIX_convolution_accuracy
  GL_CONVOLUTION_HINT_SGIX = $8316;

  // GL_SGIX_depth_texture
  GL_DEPTH_COMPONENT16_SGIX = $81A5;
  GL_DEPTH_COMPONENT24_SGIX = $81A6;
  GL_DEPTH_COMPONENT32_SGIX = $81A7;

  // GL_SGIX_fog_offset
  GL_FOG_OFFSET_SGIX = $8198;
  GL_FOG_OFFSET_VALUE_SGIX = $8199;

  // GL_SGIX_fog_scale
  GL_FOG_SCALE_SGIX = $81FC;
  GL_FOG_SCALE_VALUE_SGIX = $81FD;

  // GL_SGIX_fragment_lighting
  GL_FRAGMENT_LIGHTING_SGIX = $8400;
  GL_FRAGMENT_COLOR_MATERIAL_SGIX = $8401;
  GL_FRAGMENT_COLOR_MATERIAL_FACE_SGIX = $8402;
  GL_FRAGMENT_COLOR_MATERIAL_PARAMETER_SGIX = $8403;
  GL_MAX_FRAGMENT_LIGHTS_SGIX = $8404;
  GL_MAX_ACTIVE_LIGHTS_SGIX = $8405;
  GL_CURRENT_RASTER_NORMAL_SGIX = $8406;
  GL_LIGHT_ENV_MODE_SGIX = $8407;
  GL_FRAGMENT_LIGHT_MODEL_LOCAL_VIEWER_SGIX = $8408;
  GL_FRAGMENT_LIGHT_MODEL_TWO_SIDE_SGIX = $8409;
  GL_FRAGMENT_LIGHT_MODEL_AMBIENT_SGIX = $840A;
  GL_FRAGMENT_LIGHT_MODEL_NORMAL_INTERPOLATION_SGIX = $840B;
  GL_FRAGMENT_LIGHT0_SGIX = $840C;
  GL_FRAGMENT_LIGHT1_SGIX = $840D;
  GL_FRAGMENT_LIGHT2_SGIX = $840E;
  GL_FRAGMENT_LIGHT3_SGIX = $840F;
  GL_FRAGMENT_LIGHT4_SGIX = $8410;
  GL_FRAGMENT_LIGHT5_SGIX = $8411;
  GL_FRAGMENT_LIGHT6_SGIX = $8412;
  GL_FRAGMENT_LIGHT7_SGIX = $8413;

  // GL_SGIX_framezoom
  GL_FRAMEZOOM_SGIX = $818B;
  GL_FRAMEZOOM_FACTOR_SGIX = $818C;
  GL_MAX_FRAMEZOOM_FACTOR_SGIX = $818D;

  // GL_SGIX_impact_pixel_texture
  GL_PIXEL_TEX_GEN_Q_CEILING_SGIX = $8184;
  GL_PIXEL_TEX_GEN_Q_ROUND_SGIX = $8185;
  GL_PIXEL_TEX_GEN_Q_FLOOR_SGIX = $8186;
  GL_PIXEL_TEX_GEN_ALPHA_REPLACE_SGIX = $8187;
  GL_PIXEL_TEX_GEN_ALPHA_NO_REPLACE_SGIX = $8188;
  GL_PIXEL_TEX_GEN_ALPHA_LS_SGIX = $8189;
  GL_PIXEL_TEX_GEN_ALPHA_MS_SGIX = $818A;

  // GL_SGIX_instruments
  GL_INSTRUMENT_BUFFER_POINTER_SGIX = $8180;
  GL_INSTRUMENT_MEASUREMENTS_SGIX = $8181;

  // GL_SGIX_interlace
  GL_INTERLACE_SGIX = $8094;

  // GL_SGIX_ir_instrument1
  GL_IR_INSTRUMENT1_SGIX = $817F;

  // GL_SGIX_list_priority
  GL_LIST_PRIORITY_SGIX = $8182;

  // GL_SGIX_pixel_texture
  GL_PIXEL_TEX_GEN_SGIX = $8139;
  GL_PIXEL_TEX_GEN_MODE_SGIX = $832B;

  // GL_SGIX_pixel_tiles
  GL_PIXEL_TILE_BEST_ALIGNMENT_SGIX = $813E;
  GL_PIXEL_TILE_CACHE_INCREMENT_SGIX = $813F;
  GL_PIXEL_TILE_WIDTH_SGIX = $8140;
  GL_PIXEL_TILE_HEIGHT_SGIX = $8141;
  GL_PIXEL_TILE_GRID_WIDTH_SGIX = $8142;
  GL_PIXEL_TILE_GRID_HEIGHT_SGIX = $8143;
  GL_PIXEL_TILE_GRID_DEPTH_SGIX = $8144;
  GL_PIXEL_TILE_CACHE_SIZE_SGIX = $8145;

  // GL_SGIX_polynomial_ffd
  GL_GEOMETRY_DEFORMATION_SGIX = $8194;
  GL_TEXTURE_DEFORMATION_SGIX = $8195;
  GL_DEFORMATIONS_MASK_SGIX = $8196;
  GL_MAX_DEFORMATION_ORDER_SGIX = $8197;

  // GL_SGIX_reference_plane
  GL_REFERENCE_PLANE_SGIX = $817D;
  GL_REFERENCE_PLANE_EQUATION_SGIX = $817E;

  // GL_SGIX_resample
  GL_PACK_RESAMPLE_SGIX = $842C;
  GL_UNPACK_RESAMPLE_SGIX = $842D;
  GL_RESAMPLE_REPLICATE_SGIX = $842E;
  GL_RESAMPLE_ZERO_FILL_SGIX = $842F;
  GL_RESAMPLE_DECIMATE_SGIX = $8430;

  // GL_SGIX_scalebias_hint
  GL_SCALEBIAS_HINT_SGIX = $8322;

  // GL_SGIX_shadow
  GL_TEXTURE_COMPARE_SGIX = $819A;
  GL_TEXTURE_COMPARE_OPERATOR_SGIX = $819B;
  GL_TEXTURE_LEQUAL_R_SGIX = $819C;
  GL_TEXTURE_GEQUAL_R_SGIX = $819D;

  // GL_SGIX_shadow_ambient
  GL_SHADOW_AMBIENT_SGIX = $80BF;

  // GL_SGIX_sprite
  GL_SPRITE_SGIX = $8148;
  GL_SPRITE_MODE_SGIX = $8149;
  GL_SPRITE_AXIS_SGIX = $814A;
  GL_SPRITE_TRANSLATION_SGIX = $814B;
  GL_SPRITE_AXIAL_SGIX = $814C;
  GL_SPRITE_OBJECT_ALIGNED_SGIX = $814D;
  GL_SPRITE_EYE_ALIGNED_SGIX = $814E;

  // GL_SGIX_subsample
  GL_PACK_SUBSAMPLE_RATE_SGIX = $85A0;
  GL_UNPACK_SUBSAMPLE_RATE_SGIX = $85A1;
  GL_PIXEL_SUBSAMPLE_4444_SGIX = $85A2;
  GL_PIXEL_SUBSAMPLE_2424_SGIX = $85A3;
  GL_PIXEL_SUBSAMPLE_4242_SGIX = $85A4;

  // GL_SGIX_texture_add_env
  GL_TEXTURE_ENV_BIAS_SGIX = $80BE;

  // GL_SGIX_texture_coordinate_clamp
  GL_TEXTURE_MAX_CLAMP_S_SGIX = $8369;
  GL_TEXTURE_MAX_CLAMP_T_SGIX = $836A;
  GL_TEXTURE_MAX_CLAMP_R_SGIX = $836B;

  // GL_SGIX_texture_lod_bias
  GL_TEXTURE_LOD_BIAS_S_SGIX = $818E;
  GL_TEXTURE_LOD_BIAS_T_SGIX = $818F;
  GL_TEXTURE_LOD_BIAS_R_SGIX = $8190;

  // GL_SGIX_texture_multi_buffer
  GL_TEXTURE_MULTI_BUFFER_HINT_SGIX = $812E;

  // GL_SGIX_texture_scale_bias
  GL_POST_TEXTURE_FILTER_BIAS_SGIX = $8179;
  GL_POST_TEXTURE_FILTER_SCALE_SGIX = $817A;
  GL_POST_TEXTURE_FILTER_BIAS_RANGE_SGIX = $817B;
  GL_POST_TEXTURE_FILTER_SCALE_RANGE_SGIX = $817C;

  // GL_SGIX_vertex_preclip
  GL_VERTEX_PRECLIP_SGIX = $83EE;
  GL_VERTEX_PRECLIP_HINT_SGIX = $83EF;

  // GL_SGIX_ycrcb
  GL_YCRCB_422_SGIX = $81BB;
  GL_YCRCB_444_SGIX = $81BC;

  // GL_SGIX_ycrcba
  GL_YCRCB_SGIX = $8318;
  GL_YCRCBA_SGIX = $8319;

  // GL_SGI_color_matrix
  GL_COLOR_MATRIX_SGI = $80B1;
  GL_COLOR_MATRIX_STACK_DEPTH_SGI = $80B2;
  GL_MAX_COLOR_MATRIX_STACK_DEPTH_SGI = $80B3;
  GL_POST_COLOR_MATRIX_RED_SCALE_SGI = $80B4;
  GL_POST_COLOR_MATRIX_GREEN_SCALE_SGI = $80B5;
  GL_POST_COLOR_MATRIX_BLUE_SCALE_SGI = $80B6;
  GL_POST_COLOR_MATRIX_ALPHA_SCALE_SGI = $80B7;
  GL_POST_COLOR_MATRIX_RED_BIAS_SGI = $80B8;
  GL_POST_COLOR_MATRIX_GREEN_BIAS_SGI = $80B9;
  GL_POST_COLOR_MATRIX_BLUE_BIAS_SGI = $80BA;
  GL_POST_COLOR_MATRIX_ALPHA_BIAS_SGI = $80BB;

  // GL_SGI_color_table
  GL_COLOR_TABLE_SGI = $80D0;
  GL_POST_CONVOLUTION_COLOR_TABLE_SGI = $80D1;
  GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI = $80D2;
  GL_PROXY_COLOR_TABLE_SGI = $80D3;
  GL_PROXY_POST_CONVOLUTION_COLOR_TABLE_SGI = $80D4;
  GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE_SGI = $80D5;
  GL_COLOR_TABLE_SCALE_SGI = $80D6;
  GL_COLOR_TABLE_BIAS_SGI = $80D7;
  GL_COLOR_TABLE_FORMAT_SGI = $80D8;
  GL_COLOR_TABLE_WIDTH_SGI = $80D9;
  GL_COLOR_TABLE_RED_SIZE_SGI = $80DA;
  GL_COLOR_TABLE_GREEN_SIZE_SGI = $80DB;
  GL_COLOR_TABLE_BLUE_SIZE_SGI = $80DC;
  GL_COLOR_TABLE_ALPHA_SIZE_SGI = $80DD;
  GL_COLOR_TABLE_LUMINANCE_SIZE_SGI = $80DE;
  GL_COLOR_TABLE_INTENSITY_SIZE_SGI = $80DF;

  // GL_SGI_depth_pass_instrument
  GL_DEPTH_PASS_INSTRUMENT_SGIX = $8310;
  GL_DEPTH_PASS_INSTRUMENT_COUNTERS_SGIX = $8311;
  GL_DEPTH_PASS_INSTRUMENT_MAX_SGIX = $8312;

  // GL_SGI_texture_color_table
  GL_TEXTURE_COLOR_TABLE_SGI = $80BC;
  GL_PROXY_TEXTURE_COLOR_TABLE_SGI = $80BD;

  // GL_SUNX_constant_data
  GL_UNPACK_CONSTANT_DATA_SUNX = $81D5;
  GL_TEXTURE_CONSTANT_DATA_SUNX = $81D6;

  // GL_SUN_convolution_border_modes
  GL_WRAP_BORDER_SUN = $81D4;

  // GL_SUN_global_alpha
  GL_GLOBAL_ALPHA_SUN = $81D9;
  GL_GLOBAL_ALPHA_FACTOR_SUN = $81DA;

  // GL_SUN_mesh_array
  GL_QUAD_MESH_SUN = $8614;
  GL_TRIANGLE_MESH_SUN = $8615;

  // GL_SUN_slice_accum
  GL_SLICE_ACCUM_SUN = $85CC;

  // GL_SUN_triangle_list
  GL_RESTART_SUN = $0001;
  GL_REPLACE_MIDDLE_SUN = $0002;
  GL_REPLACE_OLDEST_SUN = $0003;
  GL_TRIANGLE_LIST_SUN = $81D7;
  GL_REPLACEMENT_CODE_SUN = $81D8;
  GL_REPLACEMENT_CODE_ARRAY_SUN = $85C0;
  GL_REPLACEMENT_CODE_ARRAY_TYPE_SUN = $85C1;
  GL_REPLACEMENT_CODE_ARRAY_STRIDE_SUN = $85C2;
  GL_REPLACEMENT_CODE_ARRAY_POINTER_SUN = $85C3;
  GL_R1UI_V3F_SUN = $85C4;
  GL_R1UI_C4UB_V3F_SUN = $85C5;
  GL_R1UI_C3F_V3F_SUN = $85C6;
  GL_R1UI_N3F_V3F_SUN = $85C7;
  GL_R1UI_C4F_N3F_V3F_SUN = $85C8;
  GL_R1UI_T2F_V3F_SUN = $85C9;
  GL_R1UI_T2F_N3F_V3F_SUN = $85CA;
  GL_R1UI_T2F_C4F_N3F_V3F_SUN = $85CB;

  // GL_WIN_phong_shading
  GL_PHONG_WIN = $80EA;
  GL_PHONG_HINT_WIN = $80EB;

  // GL_WIN_specular_fog
  GL_FOG_SPECULAR_TEXTURE_WIN = $80EC;

  // GL_ARB_vertex_shader
  GL_VERTEX_SHADER_ARB = $8B31;
  GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB = $8B4A;
  GL_MAX_VARYING_FLOATS_ARB = $8B4B;
  GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB = $8B4C;
  GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB = $8B4D;
  GL_OBJECT_ACTIVE_ATTRIBUTES_ARB = $8B89;
  GL_OBJECT_ACTIVE_ATTRIBUTE_MAX_LENGTH_ARB = $8B8A;

  // GL_KHR_blend_equation_advanced
  GL_MULTIPLY_KHR = $9294;
  GL_SCREEN_KHR = $9295;
  GL_OVERLAY_KHR = $9296;
  GL_DARKEN_KHR = $9297;
  GL_LIGHTEN_KHR = $9298;
  GL_COLORDODGE_KHR = $9299;
  GL_COLORBURN_KHR = $929A;
  GL_HARDLIGHT_KHR = $929B;
  GL_SOFTLIGHT_KHR = $929C;
  GL_DIFFERENCE_KHR = $929E;
  GL_EXCLUSION_KHR = $92A0;
  GL_HSL_HUE_KHR = $92AD;
  GL_HSL_SATURATION_KHR = $92AE;
  GL_HSL_COLOR_KHR = $92AF;
  GL_HSL_LUMINOSITY_KHR = $92B0;

  // GL_KHR_blend_equation_advanced_coherent
  GL_BLEND_ADVANCED_COHERENT_KHR = $9285;

  // GL_KHR_robustness
  GL_CONTEXT_ROBUST_ACCESS = $90F3;

  // GL_KHR_no_error
  GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR = $00000008;

  // GL_ARB_fragment_shader
  GL_FRAGMENT_SHADER_ARB = $8B30;
  GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB = $8B49; // 1.4
  GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB = $8B8B; // 1.4

  // GL_ARB_occlusion_query
  GL_SAMPLES_PASSED_ARB = $8914;
  GL_QUERY_COUNTER_BITS_ARB = $8864;
  GL_CURRENT_QUERY_ARB = $8865;
  GL_QUERY_RESULT_ARB = $8866;
  GL_QUERY_RESULT_AVAILABLE_ARB = $8867;

  // GL_ARB_pipeline_statistics_query
  GL_VERTICES_SUBMITTED_ARB         = $82EE;
  GL_PRIMITIVES_SUBMITTED_ARB       = $82EF;
  GL_VERTEX_SHADER_INVOCATIONS_ARB  = $82F0;
  GL_TESS_CONTROL_SHADER_PATCHES_ARB = $82F1;
  GL_TESS_EVALUATION_SHADER_INVOCATIONS_ARB = $82F2;
  GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB = $82F3;
  GL_FRAGMENT_SHADER_INVOCATIONS_ARB = $82F4;
  GL_COMPUTE_SHADER_INVOCATIONS_ARB = $82F5;
  GL_CLIPPING_INPUT_PRIMITIVES_ARB  = $82F6;
  GL_CLIPPING_OUTPUT_PRIMITIVES_ARB = $82F7;

  // GL_ARB_point_sprite
  GL_POINT_SPRITE_ARB = $8861;
  GL_COORD_REPLACE_ARB = $8862;

  // GL_ARB_shading_language_100
  GL_SHADING_LANGUAGE_VERSION_ARB = $8B8C; // 1.4

  // GL_ARB_shader_objects
  GL_PROGRAM_OBJECT_ARB = $8B40;

  GL_OBJECT_TYPE_ARB = $8B4E;
  GL_OBJECT_SUBTYPE_ARB = $8B4F;
  GL_OBJECT_DELETE_STATUS_ARB = $8B80;
  GL_OBJECT_COMPILE_STATUS_ARB = $8B81;
  GL_OBJECT_LINK_STATUS_ARB = $8B82;
  GL_OBJECT_VALIDATE_STATUS_ARB = $8B83;
  GL_OBJECT_INFO_LOG_LENGTH_ARB = $8B84;
  GL_OBJECT_ATTACHED_OBJECTS_ARB = $8B85;
  GL_OBJECT_ACTIVE_UNIFORMS_ARB = $8B86;
  GL_OBJECT_ACTIVE_UNIFORM_MAX_LENGTH_ARB = $8B87;
  GL_OBJECT_SHADER_SOURCE_LENGTH_ARB = $8B88;

  GL_SHADER_OBJECT_ARB = $8B48;

  GL_FLOAT_VEC2_ARB = $8B50;
  GL_FLOAT_VEC3_ARB = $8B51;
  GL_FLOAT_VEC4_ARB = $8B52;
  GL_INT_VEC2_ARB = $8B53;
  GL_INT_VEC3_ARB = $8B54;
  GL_INT_VEC4_ARB = $8B55;
  GL_BOOL_ARB = $8B56;
  GL_BOOL_VEC2_ARB = $8B57;
  GL_BOOL_VEC3_ARB = $8B58;
  GL_BOOL_VEC4_ARB = $8B59;
  GL_FLOAT_MAT2_ARB = $8B5A;
  GL_FLOAT_MAT3_ARB = $8B5B;
  GL_FLOAT_MAT4_ARB = $8B5C;
  GL_SAMPLER_1D_ARB = $8B5D;
  GL_SAMPLER_2D_ARB = $8B5E;
  GL_SAMPLER_3D_ARB = $8B5F;
  GL_SAMPLER_CUBE_ARB = $8B60;
  GL_SAMPLER_1D_SHADOW_ARB = $8B61;
  GL_SAMPLER_2D_SHADOW_ARB = $8B62;
  GL_SAMPLER_2D_RECT_ARB = $8B63;
  GL_SAMPLER_2D_RECT_SHADOW_ARB = $8B64;

  // WGL_3DFX_multisample
  WGL_SAMPLE_BUFFERS_3DFX = $2060;
  WGL_SAMPLES_3DFX = $2061;

  // WGL_ARB_buffer_region
  WGL_FRONT_COLOR_BUFFER_BIT_ARB = $00000001;
  WGL_BACK_COLOR_BUFFER_BIT_ARB = $00000002;
  WGL_DEPTH_BUFFER_BIT_ARB = $00000004;
  WGL_STENCIL_BUFFER_BIT_ARB = $00000008;

  // WGL_ARB_context_flush_control
  WGL_CONTEXT_RELEASE_BEHAVIOR_ARB = $2097;
  WGL_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB = 0;
  WGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB = $2098;

  // WGL_ARB_make_current_read
  ERROR_INVALID_PIXEL_TYPE_ARB = $2043;
  ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB = $2054;

  // WGL_ARB_multisample
  WGL_SAMPLE_BUFFERS_ARB = $2041;
  WGL_SAMPLES_ARB = $2042;

  // WGL_ARB_pbuffer
  WGL_DRAW_TO_PBUFFER_ARB = $202D;
  WGL_MAX_PBUFFER_PIXELS_ARB = $202E;
  WGL_MAX_PBUFFER_WIDTH_ARB = $202F;
  WGL_MAX_PBUFFER_HEIGHT_ARB = $2030;
  WGL_PBUFFER_LARGEST_ARB = $2033;
  WGL_PBUFFER_WIDTH_ARB = $2034;
  WGL_PBUFFER_HEIGHT_ARB = $2035;
  WGL_PBUFFER_LOST_ARB = $2036;

  // WGL_ARB_pixel_format
  WGL_NUMBER_PIXEL_FORMATS_ARB = $2000;
  WGL_DRAW_TO_WINDOW_ARB = $2001;
  WGL_DRAW_TO_BITMAP_ARB = $2002;
  WGL_ACCELERATION_ARB = $2003;
  WGL_NEED_PALETTE_ARB = $2004;
  WGL_NEED_SYSTEM_PALETTE_ARB = $2005;
  WGL_SWAP_LAYER_BUFFERS_ARB = $2006;
  WGL_SWAP_METHOD_ARB = $2007;
  WGL_NUMBER_OVERLAYS_ARB = $2008;
  WGL_NUMBER_UNDERLAYS_ARB = $2009;
  WGL_TRANSPARENT_ARB = $200A;
  WGL_TRANSPARENT_RED_VALUE_ARB = $2037;
  WGL_TRANSPARENT_GREEN_VALUE_ARB = $2038;
  WGL_TRANSPARENT_BLUE_VALUE_ARB = $2039;
  WGL_TRANSPARENT_ALPHA_VALUE_ARB = $203A;
  WGL_TRANSPARENT_INDEX_VALUE_ARB = $203B;
  WGL_SHARE_DEPTH_ARB = $200C;
  WGL_SHARE_STENCIL_ARB = $200D;
  WGL_SHARE_ACCUM_ARB = $200E;
  WGL_SUPPORT_GDI_ARB = $200F;
  WGL_SUPPORT_OPENGL_ARB = $2010;
  WGL_DOUBLE_BUFFER_ARB = $2011;
  WGL_STEREO_ARB = $2012;
  WGL_PIXEL_TYPE_ARB = $2013;
  WGL_COLOR_BITS_ARB = $2014;
  WGL_RED_BITS_ARB = $2015;
  WGL_RED_SHIFT_ARB = $2016;
  WGL_GREEN_BITS_ARB = $2017;
  WGL_GREEN_SHIFT_ARB = $2018;
  WGL_BLUE_BITS_ARB = $2019;
  WGL_BLUE_SHIFT_ARB = $201A;
  WGL_ALPHA_BITS_ARB = $201B;
  WGL_ALPHA_SHIFT_ARB = $201C;
  WGL_ACCUM_BITS_ARB = $201D;
  WGL_ACCUM_RED_BITS_ARB = $201E;
  WGL_ACCUM_GREEN_BITS_ARB = $201F;
  WGL_ACCUM_BLUE_BITS_ARB = $2020;
  WGL_ACCUM_ALPHA_BITS_ARB = $2021;
  WGL_DEPTH_BITS_ARB = $2022;
  WGL_STENCIL_BITS_ARB = $2023;
  WGL_AUX_BUFFERS_ARB = $2024;
  WGL_NO_ACCELERATION_ARB = $2025;
  WGL_GENERIC_ACCELERATION_ARB = $2026;
  WGL_FULL_ACCELERATION_ARB = $2027;
  WGL_SWAP_EXCHANGE_ARB = $2028;
  WGL_SWAP_COPY_ARB = $2029;
  WGL_SWAP_UNDEFINED_ARB = $202A;
  WGL_TYPE_RGBA_ARB = $202B;
  WGL_TYPE_COLORINDEX_ARB = $202C;

  // WGL_ARB_pixel_format_float
  WGL_RGBA_FLOAT_MODE_ARB = $8820;
  WGL_CLAMP_VERTEX_COLOR_ARB = $891A;
  WGL_CLAMP_FRAGMENT_COLOR_ARB = $891B;
  WGL_CLAMP_READ_COLOR_ARB = $891C;
  WGL_FIXED_ONLY_ARB = $891D;

  // WGL_ARB_render_texture
  WGL_BIND_TO_TEXTURE_RGB_ARB = $2070;
  WGL_BIND_TO_TEXTURE_RGBA_ARB = $2071;
  WGL_TEXTURE_FORMAT_ARB = $2072;
  WGL_TEXTURE_TARGET_ARB = $2073;
  WGL_MIPMAP_TEXTURE_ARB = $2074;
  WGL_TEXTURE_RGB_ARB = $2075;
  WGL_TEXTURE_RGBA_ARB = $2076;
  WGL_NO_TEXTURE_ARB = $2077;
  WGL_TEXTURE_CUBE_MAP_ARB = $2078;
  WGL_TEXTURE_1D_ARB = $2079;
  WGL_TEXTURE_2D_ARB = $207A;
  WGL_MIPMAP_LEVEL_ARB = $207B;
  WGL_CUBE_MAP_FACE_ARB = $207C;
  WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB = $207D;
  WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB = $207E;
  WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB = $207F;
  WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB = $2080;
  WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB = $2081;
  WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB = $2082;
  WGL_FRONT_LEFT_ARB = $2083;
  WGL_FRONT_RIGHT_ARB = $2084;
  WGL_BACK_LEFT_ARB = $2085;
  WGL_BACK_RIGHT_ARB = $2086;
  WGL_AUX0_ARB = $2087;
  WGL_AUX1_ARB = $2088;
  WGL_AUX2_ARB = $2089;
  WGL_AUX3_ARB = $208A;
  WGL_AUX4_ARB = $208B;
  WGL_AUX5_ARB = $208C;
  WGL_AUX6_ARB = $208D;
  WGL_AUX7_ARB = $208E;
  WGL_AUX8_ARB = $208F;
  WGL_AUX9_ARB = $2090;

  // WGL_ARB_robustness_application_isolation
  WGL_CONTEXT_RESET_ISOLATION_BIT_ARB = $00000008;

  // WGL_ARB_create_context
  WGL_CONTEXT_DEBUG_BIT_ARB = $00000001;
  WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB = $00000002;
  WGL_CONTEXT_MAJOR_VERSION_ARB = $2091;
  WGL_CONTEXT_MINOR_VERSION_ARB = $2092;
  WGL_CONTEXT_LAYER_PLANE_ARB = $2093;
  WGL_CONTEXT_FLAGS_ARB = $2094;
  ERROR_INVALID_VERSION_ARB = $2095;

  // WGL_ARB_create_context_profile
  WGL_CONTEXT_PROFILE_MASK_ARB = $9126;
  WGL_CONTEXT_CORE_PROFILE_BIT_ARB = $00000001;
  WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB = $00000002;
  ERROR_INVALID_PROFILE_ARB = $2096;

  // WGL_ARB_framebuffer_sRGB
  WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB = $20A9;

  // WGL_ARB_create_context_robustness
  WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB = $00000004;
  WGL_LOSE_CONTEXT_ON_RESET_ARB = $8252;
  WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB = $8256;
  WGL_NO_RESET_NOTIFICATION_ARB = $8261;

  // WGL_ATI_pixel_format_float
  WGL_TYPE_RGBA_FLOAT_ATI = $21A0;
  GL_TYPE_RGBA_FLOAT_ATI = $8820;
  GL_COLOR_CLEAR_UNCLAMPED_VALUE_ATI = $8835;

  // WGL_AMD_gpu_association
  WGL_GPU_VENDOR_AMD = $1F00;
  WGL_GPU_RENDERER_STRING_AMD = $1F01;
  WGL_GPU_OPENGL_VERSION_STRING_AMD = $1F02;
  WGL_GPU_FASTEST_TARGET_GPUS_AMD = $21A2;
  WGL_GPU_RAM_AMD = $21A3;
  WGL_GPU_CLOCK_AMD = $21A4;
  WGL_GPU_NUM_PIPES_AMD = $21A5;
  WGL_GPU_NUM_SIMD_AMD = $21A6;
  WGL_GPU_NUM_RB_AMD = $21A7;
  WGL_GPU_NUM_SPI_AMD = $21A8;

  // WGL_EXT_depth_float
  WGL_DEPTH_FLOAT_EXT = $2040;

  // WGL_EXT_make_current_read
  ERROR_INVALID_PIXEL_TYPE_EXT = $2043;

  // WGL_EXT_multisample
  WGL_SAMPLE_BUFFERS_EXT = $2041;
  WGL_SAMPLES_EXT = $2042;

  // WGL_EXT_pbuffer
  WGL_DRAW_TO_PBUFFER_EXT = $202D;
  WGL_MAX_PBUFFER_PIXELS_EXT = $202E;
  WGL_MAX_PBUFFER_WIDTH_EXT = $202F;
  WGL_MAX_PBUFFER_HEIGHT_EXT = $2030;
  WGL_OPTIMAL_PBUFFER_WIDTH_EXT = $2031;
  WGL_OPTIMAL_PBUFFER_HEIGHT_EXT = $2032;
  WGL_PBUFFER_LARGEST_EXT = $2033;
  WGL_PBUFFER_WIDTH_EXT = $2034;
  WGL_PBUFFER_HEIGHT_EXT = $2035;

  // WGL_EXT_pixel_format
  WGL_NUMBER_PIXEL_FORMATS_EXT = $2000;
  WGL_DRAW_TO_WINDOW_EXT = $2001;
  WGL_DRAW_TO_BITMAP_EXT = $2002;
  WGL_ACCELERATION_EXT = $2003;
  WGL_NEED_PALETTE_EXT = $2004;
  WGL_NEED_SYSTEM_PALETTE_EXT = $2005;
  WGL_SWAP_LAYER_BUFFERS_EXT = $2006;
  WGL_SWAP_METHOD_EXT = $2007;
  WGL_NUMBER_OVERLAYS_EXT = $2008;
  WGL_NUMBER_UNDERLAYS_EXT = $2009;
  WGL_TRANSPARENT_EXT = $200A;
  WGL_TRANSPARENT_VALUE_EXT = $200B;
  WGL_SHARE_DEPTH_EXT = $200C;
  WGL_SHARE_STENCIL_EXT = $200D;
  WGL_SHARE_ACCUM_EXT = $200E;
  WGL_SUPPORT_GDI_EXT = $200F;
  WGL_SUPPORT_OPENGL_EXT = $2010;
  WGL_DOUBLE_BUFFER_EXT = $2011;
  WGL_STEREO_EXT = $2012;
  WGL_PIXEL_TYPE_EXT = $2013;
  WGL_COLOR_BITS_EXT = $2014;
  WGL_RED_BITS_EXT = $2015;
  WGL_RED_SHIFT_EXT = $2016;
  WGL_GREEN_BITS_EXT = $2017;
  WGL_GREEN_SHIFT_EXT = $2018;
  WGL_BLUE_BITS_EXT = $2019;
  WGL_BLUE_SHIFT_EXT = $201A;
  WGL_ALPHA_BITS_EXT = $201B;
  WGL_ALPHA_SHIFT_EXT = $201C;
  WGL_ACCUM_BITS_EXT = $201D;
  WGL_ACCUM_RED_BITS_EXT = $201E;
  WGL_ACCUM_GREEN_BITS_EXT = $201F;
  WGL_ACCUM_BLUE_BITS_EXT = $2020;
  WGL_ACCUM_ALPHA_BITS_EXT = $2021;
  WGL_DEPTH_BITS_EXT = $2022;
  WGL_STENCIL_BITS_EXT = $2023;
  WGL_AUX_BUFFERS_EXT = $2024;
  WGL_NO_ACCELERATION_EXT = $2025;
  WGL_GENERIC_ACCELERATION_EXT = $2026;
  WGL_FULL_ACCELERATION_EXT = $2027;
  WGL_SWAP_EXCHANGE_EXT = $2028;
  WGL_SWAP_COPY_EXT = $2029;
  WGL_SWAP_UNDEFINED_EXT = $202A;
  WGL_TYPE_RGBA_EXT = $202B;
  WGL_TYPE_COLORINDEX_EXT = $202C;

  // WGL_I3D_digital_video_control
  WGL_DIGITAL_VIDEO_CURSOR_ALPHA_FRAMEBUFFER_I3D = $2050;
  WGL_DIGITAL_VIDEO_CURSOR_ALPHA_VALUE_I3D = $2051;
  WGL_DIGITAL_VIDEO_CURSOR_INCLUDED_I3D = $2052;
  WGL_DIGITAL_VIDEO_GAMMA_CORRECTED_I3D = $2053;

  // WGL_I3D_gamma
  WGL_GAMMA_TABLE_SIZE_I3D = $204E;
  WGL_GAMMA_EXCLUDE_DESKTOP_I3D = $204F;

  // WGL_I3D_genlock
  WGL_GENLOCK_SOURCE_MULTIVIEW_I3D = $2044;
  WGL_GENLOCK_SOURCE_EXTENAL_SYNC_I3D = $2045;
  WGL_GENLOCK_SOURCE_EXTENAL_FIELD_I3D = $2046;
  WGL_GENLOCK_SOURCE_EXTENAL_TTL_I3D = $2047;
  WGL_GENLOCK_SOURCE_DIGITAL_SYNC_I3D = $2048;
  WGL_GENLOCK_SOURCE_DIGITAL_FIELD_I3D = $2049;
  WGL_GENLOCK_SOURCE_EDGE_FALLING_I3D = $204A;
  WGL_GENLOCK_SOURCE_EDGE_RISING_I3D = $204B;
  WGL_GENLOCK_SOURCE_EDGE_BOTH_I3D = $204C;

  // WGL_I3D_image_buffer
  WGL_IMAGE_BUFFER_MIN_ACCESS_I3D = $00000001;
  WGL_IMAGE_BUFFER_LOCK_I3D = $00000002;

  // WGL_NV_float_buffer
  WGL_FLOAT_COMPONENTS_NV = $20B0;
  WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_R_NV = $20B1;
  WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RG_NV = $20B2;
  WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGB_NV = $20B3;
  WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGBA_NV = $20B4;
  WGL_TEXTURE_FLOAT_R_NV = $20B5;
  WGL_TEXTURE_FLOAT_RG_NV = $20B6;
  WGL_TEXTURE_FLOAT_RGB_NV = $20B7;
  WGL_TEXTURE_FLOAT_RGBA_NV = $20B8;

  // WGL_NV_render_depth_texture
  WGL_BIND_TO_TEXTURE_DEPTH_NV = $20A3;
  WGL_BIND_TO_TEXTURE_RECTANGLE_DEPTH_NV = $20A4;
  WGL_DEPTH_TEXTURE_FORMAT_NV = $20A5;
  WGL_TEXTURE_DEPTH_COMPONENT_NV = $20A6;
  WGL_DEPTH_COMPONENT_NV = $20A7;

  // WGL_NV_render_texture_rectangle
  WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV = $20A0;
  WGL_BIND_TO_TEXTURE_RECTANGLE_RGBA_NV = $20A1;
  WGL_TEXTURE_RECTANGLE_NV = $20A2;

  // WGL_NV_present_video
  WGL_NUM_VIDEO_SLOTS_NV = $20F0;

  // WGL_NV_video_output
  WGL_BIND_TO_VIDEO_RGB_NV = $20C0;
  WGL_BIND_TO_VIDEO_RGBA_NV = $20C1;
  WGL_BIND_TO_VIDEO_RGB_AND_DEPTH_NV = $20C2;
  WGL_VIDEO_OUT_COLOR_NV = $20C3;
  WGL_VIDEO_OUT_ALPHA_NV = $20C4;
  WGL_VIDEO_OUT_DEPTH_NV = $20C5;
  WGL_VIDEO_OUT_COLOR_AND_ALPHA_NV = $20C6;
  WGL_VIDEO_OUT_COLOR_AND_DEPTH_NV = $20C7;
  WGL_VIDEO_OUT_FRAME = $20C8;
  WGL_VIDEO_OUT_FIELD_1 = $20C9;
  WGL_VIDEO_OUT_FIELD_2 = $20CA;
  WGL_VIDEO_OUT_STACKED_FIELDS_1_2 = $20CB;
  WGL_VIDEO_OUT_STACKED_FIELDS_2_1 = $20CC;

  // WGL_NV_gpu_affinity
  WGL_ERROR_INCOMPATIBLE_AFFINITY_MASKS_NV = $20D0;
  WGL_ERROR_MISSING_AFFINITY_MASK_NV = $20D1;

  // WGL_NV_video_capture
  WGL_UNIQUE_ID_NV = $20CE;
  WGL_NUM_VIDEO_CAPTURE_SLOTS_NV = $20CF;

  // WGL_NV_multisample_coverage
  WGL_COVERAGE_SAMPLES_NV = $2042;
  WGL_COLOR_SAMPLES_NV = $20B9;

  // WGL_EXT_create_context_es2_profile
  WGL_CONTEXT_ES2_PROFILE_BIT_EXT = $00000004;

  // WGL_NV_DX_interop
  WGL_ACCESS_READ_ONLY_NV        = $00000000;
  WGL_ACCESS_READ_WRITE_NV       = $00000001;
  WGL_ACCESS_WRITE_DISCARD_NV    = $00000002;

  // WIN_draw_range_elements
  GL_MAX_ELEMENTS_VERTICES_WIN = $80E8;
  GL_MAX_ELEMENTS_INDICES_WIN = $80E9;

  // GLX 1.1 and later:
  GLX_VENDOR = 1;
  GLX_VERSION = 2;
  GLX_EXTENSIONS = 3;

  GLX_USE_GL = 1;
  GLX_BUFFER_SIZE = 2;
  GLX_LEVEL = 3;
  GLX_RGBA = 4;
  GLX_DOUBLEBUFFER = 5;
  GLX_STEREO = 6;
  GLX_AUX_BUFFERS = 7;
  GLX_RED_SIZE = 8;
  GLX_GREEN_SIZE = 9;
  GLX_BLUE_SIZE = 10;
  GLX_ALPHA_SIZE = 11;
  GLX_DEPTH_SIZE = 12;
  GLX_STENCIL_SIZE = 13;
  GLX_ACCUM_RED_SIZE = 14;
  GLX_ACCUM_GREEN_SIZE = 15;
  GLX_ACCUM_BLUE_SIZE = 16;
  GLX_ACCUM_ALPHA_SIZE = 17;

  // GLX_VERSION_1_3
  GLX_WINDOW_BIT = $00000001;
  GLX_PIXMAP_BIT = $00000002;
  GLX_PBUFFER_BIT = $00000004;
  GLX_RGBA_BIT = $00000001;
  GLX_COLOR_INDEX_BIT = $00000002;
  GLX_PBUFFER_CLOBBER_MASK = $08000000;
  GLX_FRONT_LEFT_BUFFER_BIT = $00000001;
  GLX_FRONT_RIGHT_BUFFER_BIT = $00000002;
  GLX_BACK_LEFT_BUFFER_BIT = $00000004;
  GLX_BACK_RIGHT_BUFFER_BIT = $00000008;
  GLX_AUX_BUFFERS_BIT = $00000010;
  GLX_DEPTH_BUFFER_BIT = $00000020;
  GLX_STENCIL_BUFFER_BIT = $00000040;
  GLX_ACCUM_BUFFER_BIT = $00000080;
  GLX_CONFIG_CAVEAT = $20;
  GLX_X_VISUAL_TYPE = $22;
  GLX_TRANSPARENT_TYPE = $23;
  GLX_TRANSPARENT_INDEX_VALUE = $24;
  GLX_TRANSPARENT_RED_VALUE = $25;
  GLX_TRANSPARENT_GREEN_VALUE = $26;
  GLX_TRANSPARENT_BLUE_VALUE = $27;
  GLX_TRANSPARENT_ALPHA_VALUE = $28;
  GLX_DONT_CARE = $FFFFFFFF;
  GLX_NONE = $8000;
  GLX_SLOW_CONFIG = $8001;
  GLX_TRUE_COLOR = $8002;
  GLX_DIRECT_COLOR = $8003;
  GLX_PSEUDO_COLOR = $8004;
  GLX_STATIC_COLOR = $8005;
  GLX_GRAY_SCALE = $8006;
  GLX_STATIC_GRAY = $8007;
  GLX_TRANSPARENT_RGB = $8008;
  GLX_TRANSPARENT_INDEX = $8009;
  GLX_VISUAL_ID = $800B;
  GLX_SCREEN = $800C;
  GLX_NON_CONFORMANT_CONFIG = $800D;
  GLX_DRAWABLE_TYPE = $8010;
  GLX_RENDER_TYPE = $8011;
  GLX_X_RENDERABLE = $8012;
  GLX_FBCONFIG_ID = $8013;
  GLX_RGBA_TYPE = $8014;
  GLX_COLOR_INDEX_TYPE = $8015;
  GLX_MAX_PBUFFER_WIDTH = $8016;
  GLX_MAX_PBUFFER_HEIGHT = $8017;
  GLX_MAX_PBUFFER_PIXELS = $8018;
  GLX_PRESERVED_CONTENTS = $801B;
  GLX_LARGEST_PBUFFER = $801C;
  GLX_WIDTH = $801D;
  GLX_HEIGHT = $801E;
  GLX_EVENT_MASK = $801F;
  GLX_DAMAGED = $8020;
  GLX_SAVED = $8021;
  GLX_WINDOW = $8022;
  GLX_PBUFFER = $8023;
  GLX_PBUFFER_HEIGHT = $8040;
  GLX_PBUFFER_WIDTH = $8041;

  // GLX_VERSION_1_4
  GLX_SAMPLE_BUFFERS = 100000;
  GLX_SAMPLES = 100001;

  // GLX_ARB_multisample
  GLX_SAMPLE_BUFFERS_ARB = 100000;
  GLX_SAMPLES_ARB = 100001;

  // GLX_ARB_robustness_application_isolation
  GLX_CONTEXT_RESET_ISOLATION_BIT_ARB = $00000008;

  // GLX_ARB_fbconfig_float
  GLX_RGBA_FLOAT_TYPE_ARB = $20B9;
  GLX_RGBA_FLOAT_BIT_ARB = $00000004;

  // GLX_ARB_context_flush_control
  GLX_CONTEXT_RELEASE_BEHAVIOR_ARB = $2097;
  GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB = 0;
  GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB = $2098;

  // GLX_ARB_create_context
  GLX_CONTEXT_DEBUG_BIT_ARB = $00000001;
  GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB = $00000002;
  GLX_CONTEXT_MAJOR_VERSION_ARB = $2091;
  GLX_CONTEXT_MINOR_VERSION_ARB = $2092;
  GLX_CONTEXT_FLAGS_ARB = $2094;

  // GLX_ARB_create_context_profile
  GLX_CONTEXT_CORE_PROFILE_BIT_ARB = $00000001;
  GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB = $00000002;
  GLX_CONTEXT_PROFILE_MASK_ARB = $9126;

  // GLX_ARB_vertex_buffer_object
  GLX_CONTEXT_ALLOW_BUFFER_BYTE_ORDER_MISMATCH_ARB = $2095;

  // GLX_ARB_framebuffer_sRGB
  GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB = $20B2;

  // GLX_ARB_create_context_robustness
  GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB = $00000004;
  GLX_LOSE_CONTEXT_ON_RESET_ARB = $8252;
  GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB = $8256;
  GLX_NO_RESET_NOTIFICATION_ARB = $8261;

  // GLX_EXT_visual_info
  GLX_X_VISUAL_TYPE_EXT = $22;
  GLX_TRANSPARENT_TYPE_EXT = $23;
  GLX_TRANSPARENT_INDEX_VALUE_EXT = $24;
  GLX_TRANSPARENT_RED_VALUE_EXT = $25;
  GLX_TRANSPARENT_GREEN_VALUE_EXT = $26;
  GLX_TRANSPARENT_BLUE_VALUE_EXT = $27;
  GLX_TRANSPARENT_ALPHA_VALUE_EXT = $28;
  GLX_NONE_EXT = $8000;
  GLX_TRUE_COLOR_EXT = $8002;
  GLX_DIRECT_COLOR_EXT = $8003;
  GLX_PSEUDO_COLOR_EXT = $8004;
  GLX_STATIC_COLOR_EXT = $8005;
  GLX_GRAY_SCALE_EXT = $8006;
  GLX_STATIC_GRAY_EXT = $8007;
  GLX_TRANSPARENT_RGB_EXT = $8008;
  GLX_TRANSPARENT_INDEX_EXT = $8009;

  // GLX_EXT_visual_rating
  GLX_VISUAL_CAVEAT_EXT = $20;
  GLX_SLOW_VISUAL_EXT = $8001;
  GLX_NON_CONFORMANT_VISUAL_EXT = $800D;
  (* reuse GLX_NONE_EXT *)

  // GLX_EXT_import_context
  GLX_SHARE_CONTEXT_EXT = $800A;
  GLX_VISUAL_ID_EXT = $800B;
  GLX_SCREEN_EXT = $800C;

  // GLX_EXT_fbconfig_packed_float
//  GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT = $20B1;
//  GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT = $00000008;

  // GLX_EXT_framebuffer_sRGB
//  GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT = $20B2;

  // GLX_EXT_texture_from_pixmap
  GLX_TEXTURE_1D_BIT_EXT = $00000001;
  GLX_TEXTURE_2D_BIT_EXT = $00000002;
  GLX_TEXTURE_RECTANGLE_BIT_EXT = $00000004;
  GLX_BIND_TO_TEXTURE_RGB_EXT = $20D0;
  GLX_BIND_TO_TEXTURE_RGBA_EXT = $20D1;
  GLX_BIND_TO_MIPMAP_TEXTURE_EXT = $20D2;
  GLX_BIND_TO_TEXTURE_TARGETS_EXT = $20D3;
  GLX_Y_INVERTED_EXT = $20D4;
  GLX_TEXTURE_FORMAT_EXT = $20D5;
  GLX_TEXTURE_TARGET_EXT = $20D6;
  GLX_MIPMAP_TEXTURE_EXT = $20D7;
  GLX_TEXTURE_FORMAT_NONE_EXT = $20D8;
  GLX_TEXTURE_FORMAT_RGB_EXT = $20D9;
  GLX_TEXTURE_FORMAT_RGBA_EXT = $20DA;
  GLX_TEXTURE_1D_EXT = $20DB;
  GLX_TEXTURE_2D_EXT = $20DC;
  GLX_TEXTURE_RECTANGLE_EXT = $20DD;
  GLX_FRONT_LEFT_EXT = $20DE;
  GLX_FRONT_RIGHT_EXT = $20DF;
  GLX_BACK_LEFT_EXT = $20E0;
  GLX_BACK_RIGHT_EXT = $20E1;
  GLX_FRONT_EXT = GLX_FRONT_LEFT_EXT;
  GLX_BACK_EXT = GLX_BACK_LEFT_EXT;
  GLX_AUX0_EXT = $20E2;
  GLX_AUX1_EXT = $20E3;
  GLX_AUX2_EXT = $20E4;
  GLX_AUX3_EXT = $20E5;
  GLX_AUX4_EXT = $20E6;
  GLX_AUX5_EXT = $20E7;
  GLX_AUX6_EXT = $20E8;
  GLX_AUX7_EXT = $20E9;
  GLX_AUX8_EXT = $20EA;
  GLX_AUX9_EXT = $20EB;

  // GLX_EXT_swap_control
  GLX_SWAP_INTERVAL_EXT = $20F1;
  GLX_MAX_SWAP_INTERVAL_EXT = $20F2;

  // GLX_EXT_create_context_es2_profile
  GLX_CONTEXT_ES2_PROFILE_BIT_EXT = $00000004;

  // GL_EXT_Late_Swaps
  GLX_LATE_SWAPS_TEAR_EXT         = $20F3;

  // GLU
  GLU_INVALID_ENUM = 100900;
  GLU_INVALID_VALUE = 100901;
  GLU_OUT_OF_MEMORY = 100902;
  GLU_INCOMPATIBLE_GL_VERSION = 100903;
  GLU_VERSION = 100800;
  GLU_EXTENSIONS = 100801;
  GLU_TRUE = GL_TRUE;
  GLU_FALSE = GL_FALSE;
  GLU_SMOOTH = 100000;
  GLU_FLAT = 100001;
  GLU_NONE = 100002;
  GLU_POINT = 100010;
  GLU_LINE = 100011;
  GLU_FILL = 100012;
  GLU_SILHOUETTE = 100013;
  GLU_OUTSIDE = 100020;
  GLU_INSIDE = 100021;
  GLU_TESS_MAX_COORD = 1.0E150;
  GLU_TESS_WINDING_RULE = 100140;
  GLU_TESS_BOUNDARY_ONLY = 100141;
  GLU_TESS_TOLERANCE = 100142;
  GLU_TESS_WINDING_ODD = 100130;
  GLU_TESS_WINDING_NONZERO = 100131;
  GLU_TESS_WINDING_POSITIVE = 100132;
  GLU_TESS_WINDING_NEGATIVE = 100133;
  GLU_TESS_WINDING_ABS_GEQ_TWO = 100134;
  GLU_TESS_BEGIN = 100100;
  GLU_TESS_VERTEX = 100101;
  GLU_TESS_END = 100102;
  GLU_TESS_ERROR = 100103;
  GLU_TESS_EDGE_FLAG = 100104;
  GLU_TESS_COMBINE = 100105;
  GLU_TESS_BEGIN_DATA = 100106;
  GLU_TESS_VERTEX_DATA = 100107;
  GLU_TESS_END_DATA = 100108;
  GLU_TESS_ERROR_DATA = 100109;
  GLU_TESS_EDGE_FLAG_DATA = 100110;
  GLU_TESS_COMBINE_DATA = 100111;
  GLU_TESS_ERROR1 = 100151;
  GLU_TESS_ERROR2 = 100152;
  GLU_TESS_ERROR3 = 100153;
  GLU_TESS_ERROR4 = 100154;
  GLU_TESS_ERROR5 = 100155;
  GLU_TESS_ERROR6 = 100156;
  GLU_TESS_ERROR7 = 100157;
  GLU_TESS_ERROR8 = 100158;
  GLU_TESS_MISSING_BEGIN_POLYGON = GLU_TESS_ERROR1;
  GLU_TESS_MISSING_BEGIN_CONTOUR = GLU_TESS_ERROR2;
  GLU_TESS_MISSING_END_POLYGON = GLU_TESS_ERROR3;
  GLU_TESS_MISSING_END_CONTOUR = GLU_TESS_ERROR4;
  GLU_TESS_COORD_TOO_LARGE = GLU_TESS_ERROR5;
  GLU_TESS_NEED_COMBINE_CALLBACK = GLU_TESS_ERROR6;
  GLU_AUTO_LOAD_MATRIX = 100200;
  GLU_CULLING = 100201;
  GLU_SAMPLING_TOLERANCE = 100203;
  GLU_DISPLAY_MODE = 100204;
  GLU_PARAMETRIC_TOLERANCE = 100202;
  GLU_SAMPLING_METHOD = 100205;
  GLU_U_STEP = 100206;
  GLU_V_STEP = 100207;
  GLU_PATH_LENGTH = 100215;
  GLU_PARAMETRIC_ERROR = 100216;
  GLU_DOMAIN_DISTANCE = 100217;
  GLU_MAP1_TRIM_2 = 100210;
  GLU_MAP1_TRIM_3 = 100211;
  GLU_OUTLINE_POLYGON = 100240;
  GLU_OUTLINE_PATCH = 100241;
  GLU_NURBS_ERROR1 = 100251;
  GLU_NURBS_ERROR2 = 100252;
  GLU_NURBS_ERROR3 = 100253;
  GLU_NURBS_ERROR4 = 100254;
  GLU_NURBS_ERROR5 = 100255;
  GLU_NURBS_ERROR6 = 100256;
  GLU_NURBS_ERROR7 = 100257;
  GLU_NURBS_ERROR8 = 100258;
  GLU_NURBS_ERROR9 = 100259;
  GLU_NURBS_ERROR10 = 100260;
  GLU_NURBS_ERROR11 = 100261;
  GLU_NURBS_ERROR12 = 100262;
  GLU_NURBS_ERROR13 = 100263;
  GLU_NURBS_ERROR14 = 100264;
  GLU_NURBS_ERROR15 = 100265;
  GLU_NURBS_ERROR16 = 100266;
  GLU_NURBS_ERROR17 = 100267;
  GLU_NURBS_ERROR18 = 100268;
  GLU_NURBS_ERROR19 = 100269;
  GLU_NURBS_ERROR20 = 100270;
  GLU_NURBS_ERROR21 = 100271;
  GLU_NURBS_ERROR22 = 100272;
  GLU_NURBS_ERROR23 = 100273;
  GLU_NURBS_ERROR24 = 100274;
  GLU_NURBS_ERROR25 = 100275;
  GLU_NURBS_ERROR26 = 100276;
  GLU_NURBS_ERROR27 = 100277;
  GLU_NURBS_ERROR28 = 100278;
  GLU_NURBS_ERROR29 = 100279;
  GLU_NURBS_ERROR30 = 100280;
  GLU_NURBS_ERROR31 = 100281;
  GLU_NURBS_ERROR32 = 100282;
  GLU_NURBS_ERROR33 = 100283;
  GLU_NURBS_ERROR34 = 100284;
  GLU_NURBS_ERROR35 = 100285;
  GLU_NURBS_ERROR36 = 100286;
  GLU_NURBS_ERROR37 = 100287;
  GLU_CW = 100120;
  GLU_CCW = 100121;
  GLU_INTERIOR = 100122;
  GLU_EXTERIOR = 100123;
  GLU_UNKNOWN = 100124;
  GLU_BEGIN = GLU_TESS_BEGIN;
  GLU_VERTEX = GLU_TESS_VERTEX;
  GLU_END = GLU_TESS_END;
  GLU_ERROR = GLU_TESS_ERROR;
  GLU_EDGE_FLAG = GLU_TESS_EDGE_FLAG;

// GL functions and procedures
   
   procedure glAccum(op: TGLuint; value: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glAlphaFunc(func: TGLEnum; ref: TGLclampf); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   function  glAreTexturesResident(n: TGLsizei; Textures: PGLuint; residences: PGLboolean): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glArrayElement(i: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glBegin(mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glBindTexture(target: TGLEnum; texture: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glBitmap(width: TGLsizei; height: TGLsizei; xorig, yorig: TGLfloat; xmove: TGLfloat; ymove: TGLfloat; bitmap: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glBlendFunc(sfactor: TGLEnum; dfactor: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glCallList(list: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glCallLists(n: TGLsizei; atype: TGLEnum; lists: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glClear(mask: TGLbitfield); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glClearAccum(red, green, blue, alpha: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glClearColor(red, green, blue, alpha: TGLclampf); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glClearDepth(depth: TGLclampd); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glClearIndex(c: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glClearStencil(s: TGLint ); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glClipPlane(plane: TGLEnum; equation: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3b(red, green, blue: TGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3bv(v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3d(red, green, blue: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3f(red, green, blue: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3i(red, green, blue: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3s(red, green, blue: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3ub(red, green, blue: TGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3ubv(v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3ui(red, green, blue: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3uiv(v: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3us(red, green, blue: TGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor3usv(v: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4b(red, green, blue, alpha: TGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4bv(v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4d(red, green, blue, alpha: TGLdouble ); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4f(red, green, blue, alpha: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4i(red, green, blue, alpha: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4s(red, green, blue, alpha: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4sv(v: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4ub(red, green, blue, alpha: TGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4ubv(v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4ui(red, green, blue, alpha: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4uiv(v: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4us(red, green, blue, alpha: TGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColor4usv(v: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColorMask(red, green, blue, alpha: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glColorMaterial(face: TGLEnum; mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glColorPointer(size: TGLint; atype: TGLEnum; stride: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glCopyPixels(x, y: TGLint; width, height: TGLsizei; atype: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glCopyTexImage1D(target: TGLEnum; level: TGLint; internalFormat: TGLEnum; x, y: TGLint; width: TGLsizei; border: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glCopyTexImage2D(target: TGLEnum; level: TGLint; internalFormat: TGLEnum; x, y: TGLint; width, height: TGLsizei; border: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glCopyTexSubImage1D(target: TGLEnum; level, xoffset, x, y: TGLint; width: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glCopyTexSubImage2D(target: TGLEnum; level, xoffset, yoffset, x, y: TGLint; width, height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glCullFace(mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDeleteLists(list: TGLuint; range: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glDeleteTextures(n: TGLsizei; textures: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDepthFunc(func: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDepthMask(flag: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDepthRange(zNear, zFar: TGLclampd); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDisable(cap: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDisableClientState(aarray: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glDrawArrays(mode: TGLEnum; first: TGLint; count: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDrawBuffer(mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDrawElements(mode: TGLEnum; count: TGLsizei; atype: TGLEnum; indices: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glDrawPixels(width, height: TGLsizei; format, atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEdgeFlag(flag: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEdgeFlagPointer(stride: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEdgeFlagv(flag: PGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEnable(cap: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glEnableClientState(aarray: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEnd; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEndList; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalCoord1d(u: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalCoord1dv(u: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalCoord1f(u: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalCoord1fv(u: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalCoord2d(u: TGLdouble; v: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalCoord2dv(u: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalCoord2f(u, v: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalCoord2fv(u: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalMesh1(mode: TGLEnum; i1, i2: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalMesh2(mode: TGLEnum; i1, i2, j1, j2: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalPoint1(i: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glEvalPoint2(i, j: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glFeedbackBuffer(size: TGLsizei; atype: TGLEnum; buffer: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glFinish; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glFlush; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glFogf(pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glFogfv(pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glFogi(pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glFogiv(pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glFrontFace(mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glFrustum(left, right, bottom, top, zNear, zFar: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   function  glGenLists(range: TGLsizei): TGLuint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGenTextures(n: TGLsizei; textures: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetBooleanv(pname: TGLEnum; params: PGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetClipPlane(plane: TGLEnum; equation: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetDoublev(pname: TGLEnum; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   function  glGetError: TGLuint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetFloatv(pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetIntegerv(pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetLightfv(light, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetLightiv(light, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetMapdv(target, query: TGLEnum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetMapfv(target, query: TGLEnum; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetMapiv(target, query: TGLEnum; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetMaterialfv(face, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetMaterialiv(face, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetPixelMapfv(map: TGLEnum; values: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetPixelMapuiv(map: TGLEnum; values: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetPixelMapusv(map: TGLEnum; values: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetPointerv(pname: TGLEnum; var params); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetPolygonStipple(mask: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   function  glGetString(name: TGLEnum): PChar; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetTexEnvfv(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetTexEnviv(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetTexGendv(coord, pname: TGLEnum; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetTexGenfv(coord, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetTexGeniv(coord, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glGetTexImage(target: TGLEnum; level: TGLint; format, atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetTexLevelParameterfv(target: TGLEnum; level: TGLint; pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetTexLevelParameteriv(target: TGLEnum; level: TGLint; pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetTexParameterfv(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glGetTexParameteriv(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glHint(target, mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glIndexMask(mask: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexPointer(atype: TGLEnum; stride: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexd(c: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexdv(c: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexf(c: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexfv(c: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexi(c: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexiv(c: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexs(c: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexsv(c: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexub(c: TGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glIndexubv(c: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glInitNames; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glInterleavedArrays(format: TGLEnum; stride: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   function  glIsEnabled(cap: TGLEnum): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   function  glIsList(list: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   function  glIsTexture(texture: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glLightModelf(pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLightModelfv(pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLightModeli(pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLightModeliv(pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLightf(light, pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLightfv(light, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLighti(light, pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLightiv(light, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLineStipple(factor: TGLint; pattern: TGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLineWidth(width: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glListBase(base: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLoadIdentity; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLoadMatrixd(m: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLoadMatrixf(m: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLoadName(name: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glLogicOp(opcode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;  
   procedure glMap1d(target: TGLEnum; u1, u2: TGLdouble; stride, order: TGLint; points: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMap1f(target: TGLEnum; u1, u2: TGLfloat; stride, order: TGLint; points: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMap2d(target: TGLEnum; u1, u2: TGLdouble; ustride, uorder: TGLint; v1, v2: TGLdouble; vstride, vorder: TGLint; points: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMap2f(target: TGLEnum; u1, u2: TGLfloat; ustride, uorder: TGLint; v1, v2: TGLfloat; vstride, vorder: TGLint; points: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMapGrid1d(un: TGLint; u1, u2: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMapGrid1f(un: TGLint; u1, u2: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMapGrid2d(un: TGLint; u1, u2: TGLdouble; vn: TGLint; v1, v2: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMapGrid2f(un: TGLint; u1, u2: TGLfloat; vn: TGLint; v1, v2: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMaterialf(face, pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMaterialfv(face, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMateriali(face, pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMaterialiv(face, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMatrixMode(mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMultMatrixd(m: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glMultMatrixf(m: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNewList(list: TGLuint; mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3b(nx, ny, nz: TGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3bv(v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3d(nx, ny, nz: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3f(nx, ny, nz: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3i(nx, ny, nz: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3s(nx, ny, nz: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormal3sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glNormalPointer(atype: TGLEnum; stride: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glOrtho(left, right, bottom, top, zNear, zFar: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPassThrough(token: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPixelMapfv(map: TGLEnum; mapsize: TGLsizei; values: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPixelMapuiv(map: TGLEnum; mapsize: TGLsizei; values: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPixelMapusv(map: TGLEnum; mapsize: TGLsizei; values: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPixelStoref(pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glPixelStorei(pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glPixelTransferf(pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPixelTransferi(pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPixelZoom(xfactor, yfactor: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPointSize(size: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glPolygonMode(face, mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glPolygonOffset(factor, units: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glPolygonStipple(mask: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPopAttrib; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPopClientAttrib; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPopMatrix; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPopName; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPrioritizeTextures(n: TGLsizei; textures: PGLuint; priorities: PGLclampf); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPushAttrib(mask: TGLbitfield); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPushClientAttrib(mask: TGLbitfield); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPushMatrix; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glPushName(name: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos2d(x, y: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos2dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos2f(x, y: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos2fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos2i(x, y: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos2iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos2s(x, y: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos2sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos3d(x, y, z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos3dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos3f(x, y, z: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos3fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos3i(x, y, z: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos3iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos3s(x, y, z: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos3sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos4d(x, y, z, w: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos4dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos4f(x, y, z, w: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos4fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos4i(x, y, z, w: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos4iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos4s(x, y, z, w: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRasterPos4sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glReadBuffer(mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glReadPixels(x, y: TGLint; width, height: TGLsizei; format, atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glRectd(x1, y1, x2, y2: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRectdv(v1, v2: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRectf(x1, y1, x2, y2: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRectfv(v1, v2: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRecti(x1, y1, x2, y2: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRectiv(v1, v2: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRects(x1, y1, x2, y2: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRectsv(v1, v2: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   function  glRenderMode(mode: TGLEnum): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glRotated(angle, x, y, z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glRotatef(angle, x, y, z: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glScaled(x, y, z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glScalef(x, y, z: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glScissor(x, y: TGLint; width, height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glSelectBuffer(size: TGLsizei; buffer: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glShadeModel(mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glStencilFunc(func: TGLEnum; ref: TGLint; mask: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glStencilMask(mask: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glStencilOp(fail, zfail, zpass: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTexCoord1d(s: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord1dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord1f(s: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord1fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord1i(s: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord1iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord1s(s: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord1sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord2d(s, t: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord2dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord2f(s, t: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord2fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord2i(s, t: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord2iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord2s(s, t: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord2sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord3d(s, t, r: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord3dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord3f(s, t, r: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord3fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord3i(s, t, r: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord3iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord3s(s, t, r: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord3sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord4d(s, t, r, q: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord4dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord4f(s, t, r, q: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord4fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord4i(s, t, r, q: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord4iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord4s(s, t, r, q: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoord4sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexCoordPointer(size: TGLint; atype: TGLEnum; stride: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexEnvf(target, pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexEnvfv(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexEnvi(target, pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexEnviv(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexGend(coord, pname: TGLEnum; param: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexGendv(coord, pname: TGLEnum; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexGenf(coord, pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexGenfv(coord, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexGeni(coord, pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexGeniv(coord, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTexImage1D(target: TGLEnum; level, internalformat: TGLint; width: TGLsizei; border: TGLint; format, atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTexImage2D(target: TGLEnum; level, internalformat: TGLint; width, height: TGLsizei; border: TGLint; format, atype: TGLEnum; Pixels:Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTexParameterf(target, pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTexParameterfv(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTexParameteri(target, pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTexParameteriv(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTexSubImage1D(target: TGLEnum; level, xoffset: TGLint; width: TGLsizei; format, atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTexSubImage2D(target: TGLEnum; level, xoffset, yoffset: TGLint; width, height: TGLsizei; format, atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   procedure glTranslated(x, y, z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glTranslatef(x, y, z: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex2d(x, y: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex2dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex2f(x, y: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex2fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex2i(x, y: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex2iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex2s(x, y: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex2sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex3d(x, y, z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex3dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex3f(x, y, z: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex3fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex3i(x, y, z: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex3iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex3s(x, y, z: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex3sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex4d(x, y, z, w: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex4dv(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex4f(x, y, z, w: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex4fv(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex4i(x, y, z, w: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex4iv(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex4s(x, y, z, w: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertex4sv(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glVertexPointer(size: TGLint; atype: TGLEnum; stride: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32; //deprecated;
   procedure glViewport(x, y: TGLint; width, height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external opengl32;
   // GLU utility functions and procedures
   function  gluErrorString(errCode: TGLEnum): PGLChar; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   function  gluGetString(name: TGLEnum): PGLChar; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluBeginCurve(nobj: PGLUnurbs); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluBeginPolygon(tess: PGLUtesselator); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluBeginSurface(nobj: PGLUnurbs); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   function  gluProject(objx, objy, objz: TGLdouble; const modelMatrix: TMatrix4d; const projMatrix: TMatrix4d; const viewport: TVector4i; winx, winy, winz: PGLdouble): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   function  gluUnProject(winx, winy, winz: TGLdouble; const modelMatrix: TMatrix4d; const projMatrix: TMatrix4d; const viewport: TVector4i; objx, objy, objz: PGLdouble): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   function  gluScaleImage(format: TGLEnum; widthin, heightin: TGLint; typein: TGLEnum; datain: Pointer; widthout, heightout: TGLint; typeout: TGLEnum; dataout: Pointer): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   function  gluBuild1DMipmaps(target: TGLEnum; components, width: TGLint; format, atype: TGLEnum; data: Pointer): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   function  gluBuild2DMipmaps(target: TGLEnum; components, width, height: TGLint; format, atype: TGLEnum;  data: Pointer): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;   
   function  gluNewQuadric: PGLUquadric; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;   
   function  gluNewNurbsRenderer: PGLUnurbs; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   function  gluNewTess: PGLUtesselator; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;

   procedure gluBeginTrim(nobj: PGLUnurbs); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluCylinder(quadObject: PGLUquadric; baseRadius, topRadius, height: TGLdouble; slices,  stacks: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluDeleteNurbsRenderer(nobj: PGLUnurbs); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluDeleteQuadric(state: PGLUquadric); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluDeleteTess(tess: PGLUtesselator); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluDisk(quadObject: PGLUquadric; innerRadius, outerRadius: TGLdouble; slices, loops: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluEndCurve(nobj: PGLUnurbs); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluEndPolygon(tess: PGLUtesselator); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluEndSurface(nobj: PGLUnurbs); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;  
   procedure gluEndTrim(nobj: PGLUnurbs); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluGetNurbsProperty(nobj: PGLUnurbs; aproperty: TGLEnum; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluGetTessProperty(tess: PGLUtesselator; which: TGLEnum; value: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluLoadSamplingMatrices(nobj: PGLUnurbs; const modelMatrix: TMatrix4f; const projMatrix: TMatrix4f; const viewport: TVector4i); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluNextContour(tess: PGLUtesselator; atype: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluNurbsCallback(nobj: PGLUnurbs; which: TGLEnum; fn: TGLUNurbsErrorProc); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluNurbsCurve(nobj: PGLUnurbs; nknots: TGLint; knot: PGLfloat; stride: TGLint; ctlarray: PGLfloat; order: TGLint; atype: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluNurbsProperty(nobj: PGLUnurbs; aproperty: TGLEnum; value: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluNurbsSurface(nobj: PGLUnurbs; sknot_count: TGLint; sknot: PGLfloat; tknot_count: TGLint; tknot: PGLfloat; s_stride, t_stride: TGLint; ctlarray: PGLfloat; sorder, torder: TGLint; atype: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluOrtho2D(left, right, bottom, top: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluPartialDisk(quadObject: PGLUquadric; innerRadius, outerRadius: TGLdouble; slices, loops: TGLint;                            startAngle, sweepAngle: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluPerspective(fovy, aspect, zNear, zFar: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluPickMatrix(x, y, width, height: TGLdouble; const viewport: TVector4i); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluPwlCurve(nobj: PGLUnurbs; count: TGLint; points: PGLfloat; stride: TGLint; atype: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluQuadricCallback(quadObject: PGLUquadric; which: TGLEnum; fn: TGLUQuadricErrorProc); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluQuadricDrawStyle(quadObject: PGLUquadric; drawStyle: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluQuadricNormals(quadObject: PGLUquadric; normals: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluQuadricOrientation(quadObject: PGLUquadric; orientation: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluQuadricTexture(quadObject: PGLUquadric; textureCoords: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluSphere(quadObject: PGLUquadric; radius: TGLdouble; slices, stacks: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluTessBeginContour(tess: PGLUtesselator); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluTessBeginPolygon(tess: PGLUtesselator; polygon_data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluTessCallback(tess: PGLUtesselator; which: TGLEnum; fn: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluTessEndContour(tess: PGLUtesselator); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluTessEndPolygon(tess: PGLUtesselator); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluTessNormal(tess: PGLUtesselator; x, y, z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluTessProperty(tess: PGLUtesselator; which: TGLEnum; value: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;
   procedure gluTessVertex(tess: PGLUtesselator; const coords: TVector3d; data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} external glu32;

   function wglCopyContext(p1: HGLRC; p2: HGLRC; p3: Cardinal): BOOL; stdcall; external opengl32;
   function wglCreateContext(DC: HDC): HGLRC; stdcall; external opengl32;
   function wglCreateLayerContext(p1: HDC; p2: Integer): HGLRC; stdcall; external opengl32;
   function wglDeleteContext(p1: HGLRC): BOOL; stdcall; external opengl32;
   function wglDescribeLayerPlane(p1: HDC; p2, p3: Integer; p4: Cardinal; var p5: TLayerPlaneDescriptor): BOOL; stdcall; external opengl32;
   function wglGetCurrentContext: HGLRC; stdcall; external opengl32;
   function wglGetCurrentDC: HDC; stdcall; external opengl32;
   function wglGetLayerPaletteEntries(p1: HDC; p2, p3, p4: Integer; var pcr): Integer; stdcall; external opengl32;
   function wglGetProcAddress(ProcName: PGLChar): Pointer; stdcall; external opengl32;
   function wglMakeCurrent(DC: HDC; p2: HGLRC): BOOL; stdcall; external opengl32;
   function wglRealizeLayerPalette(p1: HDC; p2: Integer; p3: BOOL): BOOL; stdcall; external opengl32;
   function wglSetLayerPaletteEntries(p1: HDC; p2, p3, p4: Integer; var pcr): Integer; stdcall; external opengl32;
   function wglShareLists(p1, p2: HGLRC): BOOL; stdcall; external opengl32;
   function wglSwapLayerBuffers(p1: HDC; p2: Cardinal): BOOL; stdcall; external opengl32;
   function wglSwapMultipleBuffers(p1: UINT; const p2: PWGLSwap): DWORD; stdcall; external opengl32;
   function wglUseFontBitmapsA(DC: HDC; p2, p3, p4: DWORD): BOOL; stdcall; external opengl32;
   function wglUseFontOutlinesA (p1: HDC; p2, p3, p4: DWORD; p5, p6: Single; p7: Integer; p8: PGlyphMetricsFloat): BOOL; stdcall; external opengl32;
   function wglUseFontBitmapsW(DC: HDC; p2, p3, p4: DWORD): BOOL; stdcall; external opengl32;
   function wglUseFontOutlinesW (p1: HDC; p2, p3, p4: DWORD; p5, p6: Single; p7: Integer; p8: PGlyphMetricsFloat): BOOL; stdcall; external opengl32;
   function wglUseFontBitmaps(DC: HDC; p2, p3, p4: DWORD): BOOL; stdcall; external opengl32 name 'wglUseFontBitmapsA';
   function wglUseFontOutlines(p1: HDC; p2, p3, p4: DWORD; p5, p6: Single; p7: Integer; p8: PGlyphMetricsFloat): BOOL; stdcall; external opengl32 name 'wglUseFontOutlinesA';

{$IFDEF USE_MULTITHREAD}
threadvar
{$ELSE}
var
{$ENDIF}

// ------------------- OpenGL extension function/procedure definitions ------------------

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 1.2 Core
   //  ###########################################################

   // promoted to core v1.2 from GL_EXT_blend_color (#2)
   glBlendColor: procedure(red, green, blue, alpha: TGLclampf); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.2 from GL_EXT_blend_minmax (#37)
   glBlendEquation: procedure(mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.2 from GL_EXT_draw_range_elements (#112)
   glDrawRangeElements: procedure(mode: TGLEnum; Astart, Aend: TGLuint; count: TGLsizei; Atype: TGLEnum; indices: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.2 from GL_EXT_texture3D (#6)
   glTexImage3D: procedure(target: TGLEnum; level: TGLint; internalformat: TGLEnum; width, height, depth: TGLsizei; border: TGLint; format: TGLEnum; Atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexSubImage3D: procedure(target: TGLEnum; level, xoffset, yoffset, zoffset: TGLint;  width, height, depth: TGLsizei; format: TGLEnum; Atype: TGLEnum; pixels: Pointer);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.2 from GL_EXT_copy_texture
   glCopyTexSubImage3D: procedure(target: TGLEnum; level, xoffset, yoffset, zoffset, x, y: TGLint; width, height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

{$IFDEF USE_DEPRECATED} 
   // promoted to core v1.2 from GL_SGI_color_table (#14)
   glColorTable: procedure(target, internalformat: TGLEnum; width: TGLsizei; format, Atype: TGLEnum;
                           table: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glColorTableParameterfv: procedure(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glColorTableParameteriv: procedure(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glCopyColorTable: procedure(target, internalformat: TGLEnum; x, y: TGLint; width: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetColorTable: procedure(target, format, Atype: TGLEnum; table: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetColorTableParameterfv: procedure(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetColorTableParameteriv: procedure(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;

   // promoted to core v1.2 from GL_EXT_color_subtable (#74)
   glColorSubTable: procedure(target: TGLEnum; start, count: TGLsizei; format, Atype: TGLEnum; data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glCopyColorSubTable: procedure(target: TGLEnum; start: TGLsizei; x, y: TGLint; width: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;

   // promoted to core v1.2 from GL_EXT_convolution (#12)
   glConvolutionFilter1D: procedure(target, internalformat: TGLEnum; width: TGLsizei; format, Atype: TGLEnum;
     image: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glConvolutionFilter2D: procedure(target, internalformat: TGLEnum; width, height: TGLsizei; format, Atype: TGLEnum;
     image: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glConvolutionParameterf: procedure(target, pname: TGLEnum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glConvolutionParameterfv: procedure(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glConvolutionParameteri: procedure(target, pname: TGLEnum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glConvolutionParameteriv: procedure(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glCopyConvolutionFilter1D: procedure(target, internalformat: TGLEnum; x, y: TGLint; width: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glCopyConvolutionFilter2D: procedure(target, internalformat: TGLEnum; x, y: TGLint; width, height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetConvolutionFilter: procedure(target, internalformat, Atype: TGLEnum; image: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetConvolutionParameterfv: procedure(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetConvolutionParameteriv: procedure(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetSeparableFilter: procedure(target, format, Atype: TGLEnum; row, column, span: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSeparableFilter2D: procedure(target, internalformat: TGLEnum; width, height: TGLsizei; format, Atype: TGLEnum; row, column: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;

   // promoted to core v1.2 from GL_EXT_histogram (#11)
   glGetHistogram: procedure(target: TGLEnum; reset: TGLboolean; format, Atype: TGLEnum; values: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetHistogramParameterfv: procedure(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetHistogramParameteriv: procedure(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetMinmax: procedure(target: TGLEnum; reset: TGLboolean; format, Atype: TGLEnum; values: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetMinmaxParameterfv: procedure(target, pname: TGLEnum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glGetMinmaxParameteriv: procedure(target, pname: TGLEnum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glHistogram: procedure(target: TGLEnum; width: TGLsizei; internalformat: TGLEnum; sink: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMinmax: procedure(target, internalformat: TGLEnum; sink: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glResetHistogram: procedure(target: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glResetMinmax: procedure(target: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
{$ENDIF}

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 1.3 Core
   //  ###########################################################

   // promoted to core v1.3 from GL_ARB_multitexture (#1)
   glActiveTexture: procedure(texture: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   // promoted to core v1.3 from GL_ARB_multisample (#5)
   glSampleCoverage: procedure(Value: TGLclampf; invert: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.3 from GL_ARB_texture_compression (#12)
   glCompressedTexImage3D: procedure(target: TGLenum; level: TGLint; internalformat: TGLenum; Width, Height, depth: TGLsizei; border: TGLint; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexImage2D: procedure(target: TGLenum; level: TGLint; internalformat: TGLenum; Width, Height: TGLsizei; border: TGLint; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexImage1D: procedure(target: TGLenum; level: TGLint; internalformat: TGLenum; Width: TGLsizei; border: TGLint; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexSubImage3D: procedure(target: TGLenum; level: TGLint; xoffset, yoffset, zoffset: TGLint; width, height, depth: TGLsizei; Format: TGLenum; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexSubImage2D: procedure(target: TGLenum; level: TGLint; xoffset, yoffset: TGLint; width, height: TGLsizei; Format: TGLenum; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexSubImage1D: procedure(target: TGLenum; level: TGLint; xoffset: TGLint; width: TGLsizei; Format: TGLenum; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetCompressedTexImage: procedure(target: TGLenum; level: TGLint; img: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

{$IFDEF USE_DEPRECATED} 
   glClientActiveTexture: procedure(texture: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord1d: procedure(target: TGLenum; s: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord1dV: procedure(target: TGLenum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord1f: procedure(target: TGLenum; s: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord1fV: procedure(target: TGLenum; v: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord1i: procedure(target: TGLenum; s: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord1iV: procedure(target: TGLenum; v: PGLInt); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord1s: procedure(target: TGLenum; s: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord1sV: procedure(target: TGLenum; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord2d: procedure(target: TGLenum; s, t: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord2dv: procedure(target: TGLenum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord2f: procedure(target: TGLenum; s, t: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord2fv: procedure(target: TGLenum; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord2i: procedure(target: TGLenum; s, t: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord2iv: procedure(target: TGLenum; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord2s: procedure(target: TGLenum; s, t: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord2sv: procedure(target: TGLenum; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord3d: procedure(target: TGLenum; s, t, r: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord3dv: procedure(target: TGLenum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord3f: procedure(target: TGLenum; s, t, r: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord3fv: procedure(target: TGLenum; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord3i: procedure(target: TGLenum; s, t, r: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord3iv: procedure(target: TGLenum; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord3s: procedure(target: TGLenum; s, t, r: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord3sv: procedure(target: TGLenum; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord4d: procedure(target: TGLenum; s, t, r, q: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord4dv: procedure(target: TGLenum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord4f: procedure(target: TGLenum; s, t, r, q: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord4fv: procedure(target: TGLenum; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord4i: procedure(target: TGLenum; s, t, r, q: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord4iv: procedure(target: TGLenum; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord4s: procedure(target: TGLenum; s, t, r, q: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultiTexCoord4sv: procedure(target: TGLenum; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;

   // promoted to core v1.3 from GL_ARB_transpose_matrix
   glLoadTransposeMatrixf: procedure(m: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glLoadTransposeMatrixd: procedure(m: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultTransposeMatrixf: procedure(m: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glMultTransposeMatrixd: procedure(m: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
{$ENDIF}

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 1.4 Core
   //  ###########################################################

   // promoted to core v1.4 from GL_EXT_blend_func_separate (#173)
   glBlendFuncSeparate: procedure(sfactorRGB, dfactorRGB, sfactorAlpha, dfactorAlpha: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.4 from GL_EXT_multi_draw_arrays (#148)
   glMultiDrawArrays: procedure(mode: TGLenum; First: PGLint; Count: PGLsizei; primcount: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiDrawElements: procedure(mode: TGLenum; Count: PGLsizei; AType: TGLenum; var indices; primcount: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.4 from GL_ARB_point_parameters (#14), GL_NV_point_sprite (#262)
   glPointParameterf: procedure(pname: TGLenum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPointParameterfv: procedure(pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPointParameteri: procedure(pname: TGLenum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPointParameteriv: procedure(pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
{$IFDEF USE_DEPRECATED} 
   // promoted to core v1.4 from GL_EXT_fog_coord (#149)
   glFogCoordf: procedure(coord: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glFogCoordfv: procedure(coord: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glFogCoordd: procedure(coord: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glFogCoorddv: procedure(coord: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glFogCoordPointer: procedure(AType: TGLenum; stride: TGLsizei; p: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;

   // promoted to core v1.4 from GL_EXT_secondary_color (#145)
   glSecondaryColor3b: procedure(red, green, blue: TGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3bv: procedure(v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3d: procedure(red, green, blue: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3dv: procedure(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3f: procedure(red, green, blue: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3fv: procedure(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3i: procedure(red, green, blue: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3iv: procedure(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3s: procedure(red, green, blue: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3sv: procedure(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3ub: procedure(red, green, blue: TGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3ubv: procedure(v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3ui: procedure(red, green, blue: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3uiv: procedure(v: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3us: procedure(red, green, blue: TGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColor3usv: procedure(v: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glSecondaryColorPointer: procedure(Size: TGLint; Atype: TGLenum; stride: TGLsizei; p: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;

   // promoted to core v1.4 from GL_ARB_window_pos (#25)
   glWindowPos2d: procedure(x,y : TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos2dv: procedure(v : PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos2f: procedure(x,y : TGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos2fv: procedure(v : PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos2i: procedure(x,y : TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos2iv: procedure(v : PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos2s: procedure(x,y : TGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos2sv: procedure(v : PGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos3d: procedure(x,y,z : TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos3dv: procedure(v : PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos3f: procedure(x,y,z : TGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos3fv: procedure(v : PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos3i: procedure(x,y,z : TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos3iv: procedure(v : PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos3s: procedure(x,y,z : TGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
   glWindowPos3sv: procedure(v : PGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF} //deprecated;
  {$ENDIF} 
   
   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 1.5 Core
   //  ###########################################################

   // promoted to core v1.5 from GL_ARB_occlusion_query (#29)
   glGenQueries: procedure(n: TGLsizei; ids: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteQueries: procedure(n: TGLsizei; const ids: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsQuery:  function(id: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBeginQuery: procedure(target: TGLenum; id: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndQuery: procedure(target: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryiv: procedure(target: TGLEnum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryObjectiv: procedure(id: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryObjectuiv: procedure(id: TGLuint; pname: TGLenum; params: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.5 from GL_ARB_vertex_buffer_object (#28)
   glBindBuffer: procedure(target: TGLenum; buffer: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteBuffers: procedure(n: TGLsizei; const buffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenBuffers: procedure(n: TGLsizei; buffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsBuffer: function(buffer: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBufferData: procedure(target: TGLenum; size: TGLsizei; const data: Pointer; usage: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBufferSubData: procedure(target: TGLenum; offset: TGLuint; size: TGLsizei; const data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBufferSubData: procedure(target: TGLenum; offset: TGLuint; size: TGLsizei; data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMapBuffer: function(target: TGLenum; access: TGLenum): Pointer; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUnmapBuffer: function(target: TGLenum): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBufferParameteriv: procedure(target: TGLenum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBufferPointerv: procedure(target: TGLenum; pname: TGLenum; params: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v1.5 from GL_EXT_shadow_funcs (#267)
   // (no functions or procedures)

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 2.0 Core
   //  ###########################################################

   // promoted to core v2.0 from GL_EXT_blend_equation_separate (#299)
   glBlendEquationSeparate: procedure(modeRGB: TGLenum; modeAlpha: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v2.0 from GL_ARB_draw_buffers (#37)
   glDrawBuffers: procedure(n: TGLsizei; const bufs: PGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v2.0 from GL_ARB_stencil_two_side (no # found)
   glStencilOpSeparate: procedure(face, sfail, dpfail, dppass: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glStencilFuncSeparate: procedure(face, func: TGLenum; ref: TGLint; mask: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glStencilMaskSeparate: procedure(face: TGLenum; mask: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v2.0 from GL_ARB_shader_objects (#30) / GL_ARB_vertex_shader (#31) / GL_ARB_fragment_shader (#32)
   glAttachShader: procedure(_program: TGLuint; shader: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindAttribLocation: procedure(_program: TGLuint; index: TGLuint; const name: PGLChar);
   glCompileShader: procedure(shader: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCreateProgram: function(): TGLuint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCreateShader: function(_type: TGLenum): TGLuint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteProgram: procedure(_program: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteShader: procedure(shader: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDetachShader: procedure(_program: TGLuint; shader: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDisableVertexAttribArray: procedure(index: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEnableVertexAttribArray: procedure(index: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveAttrib: procedure(_program: TGLuint; index: TGLuint; bufSize: TGLsizei; length: PGLsizei; size: PGLint; _type: PGLenum; name: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveUniform: procedure(_program: TGLuint; index: TGLuint; bufSize: TGLsizei; length: PGLsizei; size: PGLint; _type: PGLenum; name: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetAttachedShaders: procedure(_program: TGLuint; maxCount: TGLsizei; count: PGLSizei; obj: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetAttribLocation: function(_program: TGLuint; const name: PGLChar): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramiv: procedure(_program: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramInfoLog: procedure(_program: TGLuint; bufSize: TGLsizei; length: PGLsizei; infoLog: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetShaderiv: procedure(shader: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetShaderInfoLog: procedure(shader: TGLuint; bufSize: TGLsizei; length: PGLsizei; infoLog: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetShaderSource: procedure(shader:TGLuint; bufSize: TGLsizei; length: PGLsizei; source: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformLocation: function(_program: TGLuint; const name: PGLChar): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformfv: procedure(_program: TGLuint; location: TGLint; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformiv: procedure(_program: TGLuint; location: TGLint; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribdv: procedure(index:TGLuint; pname: TGLenum; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribfv: procedure(index: TGLuint; pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribiv: procedure(index: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribPointerv: procedure(index: TGLuint; pname: TGLenum; _pointer:pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsProgram: function(_program: TGLuint):TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsShader: function(shader: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glLinkProgram: procedure(_program: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glShaderSource: procedure(shader: TGLuint; count: TGLsizei; const _string: PGLPCharArray; const length: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUseProgram: procedure(_program: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1f: procedure(location: TGLint; v0: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2f: procedure(location: TGLint; v0: TGLfloat; v1: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3f: procedure(location: TGLint; v0: TGLfloat; v1: TGLfloat; v2: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4f: procedure(location: TGLint; v0: TGLfloat; v1: TGLfloat; v2: TGLfloat; v3: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1i: procedure(location: TGLint; v0: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2i: procedure(location: TGLint; v0: TGLint; v1: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3i: procedure(location: TGLint; v0: TGLint; v1: TGLint; v2: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4i: procedure(location: TGLint; v0: TGLint; v1: TGLint; v2: TGLint; v3: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1fv: procedure(location: TGLint; count: TGLsizei; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2fv: procedure(location: TGLint; count: TGLsizei; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3fv: procedure(location: TGLint; count: TGLsizei; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4fv: procedure(location: TGLint; count: TGLsizei; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1iv: procedure(location: TGLint; count: TGLsizei; value: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2iv: procedure(location: TGLint; count: TGLsizei; value: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3iv: procedure(location: TGLint; count: TGLsizei; value: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4iv: procedure(location: TGLint; count: TGLsizei; value: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix2fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix3fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix4fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glValidateProgram: procedure(_program: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1d: procedure(index:TGLuint; x: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1dv: procedure(index:TGLuint; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1f: procedure(index:TGLuint; x: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1fv: procedure(index:TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1s: procedure(index:TGLuint; x: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1sv: procedure(index:TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2d: procedure(index:TGLuint; x,y: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2dv: procedure(index:TGLuint; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2f: procedure(index:TGLuint; x,y: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2fv: procedure(index:TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2s: procedure(index:TGLuint; x,y: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2sv: procedure(index:TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3d: procedure(index:TGLuint; x,y,z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3dv: procedure(index:TGLuint; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3f: procedure(index:TGLuint; x,y,z: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3fv: procedure(index:TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3s: procedure(index:TGLuint; x,y,z: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3sv: procedure(index:TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4Nbv: procedure(index:TGLuint; v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4Niv: procedure(index:TGLuint; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4Nsv: procedure(index:TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4Nub: procedure(index:TGLuint; x,y,z,w: TGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4Nubv: procedure(index:TGLuint; v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4Nuiv: procedure(index:TGLuint; v: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4Nusv: procedure(index:TGLuint; v: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4bv: procedure(index:TGLuint; v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4d: procedure(index:TGLuint; x,y,z,w: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4dv: procedure(index:TGLuint; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4f: procedure(index:TGLuint; x,y,z,w: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4fv: procedure(index:TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4iv: procedure(index:TGLuint; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4s: procedure(index:TGLuint; x,y,z,w: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4sv: procedure(index:TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4ubv: procedure(index:TGLuint; v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4uiv: procedure(index:TGLuint; v: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4usv: procedure(index:TGLuint; v: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribPointer: procedure(index:TGLuint; size: TGLint; _type: TGLenum; normalized: TGLboolean; stride:TGLsizei; _pointer:pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}


   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 2.1 Core
   //  ###########################################################

   glUniformMatrix2x3fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLBoolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix3x2fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLBoolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix2x4fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLBoolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix4x2fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLBoolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix3x4fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLBoolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix4x3fv: procedure(location: TGLint; count: TGLsizei; transpose: TGLBoolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 3.0 Core
   //  ###########################################################

   glVertexAttribI1i: procedure(index: TGLuint; x: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI2i: procedure(index: TGLuint; x: TGLint; y: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI3i: procedure(index: TGLuint; x: TGLint; y: TGLint; z: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4i: procedure(index: TGLuint; x: TGLint; y: TGLint; z: TGLint; w: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI1ui: procedure(index: TGLuint; x: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI2ui: procedure(index: TGLuint; x: TGLuint; y: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI3ui: procedure(index: TGLuint; x: TGLuint; y: TGLuint; z: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4ui: procedure(index: TGLuint; x: TGLuint; y: TGLuint; z: TGLuint; w: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI1iv: procedure(index: TGLuint; v:PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI2iv: procedure(index: TGLuint; v:PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI3iv: procedure(index: TGLuint; v:PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4iv: procedure(index: TGLuint; v:PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI1uiv: procedure(index: TGLuint; v:PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI2uiv: procedure(index: TGLuint; v:PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI3uiv: procedure(index: TGLuint; v:PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4uiv: procedure(index: TGLuint; v:PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4bv: procedure(index: TGLuint; v:PGLbyte);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4sv: procedure(index: TGLuint; v:PGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4ubv: procedure(index: TGLuint; v: PGLUbyte);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4usv: procedure(index: TGLuint; v: PGLushort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribIPointer: procedure(index: TGLuint; size: TGLint; _type: TGLenum;
                                stride: TGLsizei; _pointer: pointer);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribIiv: procedure(index: TGLuint; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribIuiv: procedure(index: TGLuint; pname: TGLenum; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1ui: procedure(location: TGLInt; v0: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2ui: procedure(location: TGLInt; v0: TGLuint; v1: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3ui: procedure(location: TGLInt; v0: TGLuint; v1: TGLuint; v2: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4ui: procedure(location: TGLInt; v0: TGLuint; v1: TGLuint; v2: TGLuint; v3: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1uiv: procedure(location: TGLInt; count: TGLsizei; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2uiv: procedure(location: TGLInt; count: TGLsizei; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3uiv: procedure(location: TGLInt; count: TGLsizei; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4uiv: procedure(location: TGLInt; count: TGLsizei; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformuiv: procedure(_program: TGLuint; location: TGLint; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindFragDataLocation: procedure(_program: TGLuint; colorNumber: TGLuint; name: PGLChar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetFragDataLocation: function(_program: TGLuint; name: PGLChar): TGLint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   glBeginConditionalRender: procedure(id: TGLuint; mode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndConditionalRender: procedure();{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   glClampColor: procedure (target: TGLenum; clamp: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v3.0 from GL_EXT_texture_integer
   //glClearColorIi: procedure(r: TGLint; g: TGLint; b: TGLint; a: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   //glClearColorIui: procedure(r: TGLuint; g: TGLuint; b: TGLuint; a: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexParameterIiv: procedure(target: TGLenum; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexParameterIuiv: procedure(target: TGLenum; pname: TGLenum; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetTexParameterIiv: procedure(target: TGLenum; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetTexParameterIuiv: procedure(target: TGLenum; pname: TGLenum; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // promoted to core v3.0 from GL_EXT_draw_buffers2
   glColorMaski: procedure(index: TGLuint; r: TGLboolean; g: TGLboolean;
                            b: TGLboolean; a: TGLboolean);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBooleani_v: procedure(target: TGLenum; index: TGLuint; data: PGLboolean);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetIntegeri_v: procedure(target: TGLenum; index: TGLuint; data: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEnablei: procedure(target: TGLenum; index: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDisablei: procedure(target: TGLenum; index: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsEnabledi: function(target: TGLenum; index: TGLuint): TGLboolean;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   //promoted to core v3.0 from GL_EXT_transform_feedback
   glBindBufferRange: procedure(target: TGLenum; index: TGLuint; buffer: TGLuint;
                            offset: TGLintptr; size: TGLsizeiptr);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindBufferBase: procedure(target: TGLenum; index: TGLuint; buffer: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBeginTransformFeedback: procedure(primitiveMode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndTransformFeedback: procedure();{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTransformFeedbackVaryings: procedure(_program: TGLuint; count: TGLsizei;
                                      const varyings: PGLPCharArray; bufferMode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetTransformFeedbackVarying: procedure(_program: TGLuint; index: TGLuint;
     bufSize: TGLsizei; length: PGLsizei; size: PGLsizei; _type: PGLenum; name: PGLChar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // New commands in OpenGL 3.0
   glClearBufferiv: procedure(buffer: TGLenum; drawbuffer: TGLint; value: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glClearBufferuiv: procedure(buffer: TGLenum; drawbuffer: TGLint; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glClearBufferfv: procedure(buffer: TGLenum; drawbuffer: TGLint; value: PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glClearBufferfi: procedure(buffer: TGLenum; drawbuffer: TGLint; depth: TGLfloat; stencil: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetStringi: function(name: TGLenum; index: TGLuint): PGLChar;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

  // GL_VERSION_2_1

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 3.1 Core
   //  ###########################################################

   glDrawArraysInstanced: procedure(mode: TGLenum; first: TGLint; count: TGLsizei; primcount: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDrawElementsInstanced: procedure(mode: TGLenum; count: TGLsizei; _type: TGLenum; indices: PGLvoid; primcount: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexBuffer: procedure(target: TGLenum; internalformat: TGLenum; buffer: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPrimitiveRestartIndex: procedure(index: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 3.2 Core
   //  ###########################################################

   glGetInteger64i_v: procedure(target: TGLenum; index: TGLuint; data: PGLint64);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBufferParameteri64v: procedure(target: TGLenum; pname: TGLenum; params: PGLint64);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramParameteri: procedure(_program: TGLuint; pname: TGLenum; value: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTexture: procedure(target: TGLenum; attachment: TGLenum; texture: TGLuint; level: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
// glFramebufferTextureFace: procedure(target: TGLenum; attachment: TGLenum; texture: TGLuint; level: TGLint; face: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   // OpenGL 3.2 also reuses entry points from these extensions:
   // GL_ARB_draw_elements_base_vertex
   // GL_ARB_provoking_vertex
   // GL_ARB_sync
   // GL_ARB_texture_multisample

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 3.3 Core
   //  ###########################################################

   // OpenGL 3.3 reuses entry points from these extensions:
   // GL_ARB_blend_func_extended (ARB #78)
   (* ARB_sampler_objects *)
   // GL_ARB_explicit_attrib_location (ARB #79) (none)
   // GL_ARB_occlusion_query2 (ARB #80)
   // GL_ARB_sampler_objects (ARB #81)
   // GL_ARB_shader_bit_encoding (ARB #82)
   // GL_ARB_texture_rgb10_a2ui (ARB #83)
   // GL_ARB_texture_swizzle (ARB #84)
   // GL_ARB_timer_query (ARB #85)
   // GL_ARB_vertex_type_2_10_10_10_rev (ARB #86)

   //  ###########################################################
   //           function and procedure definitions for
   //            extensions integrated into OpenGL 4.0 Core
   //  ###########################################################

   // OpenGL 4.0 uses entry points from these extensions:
  (* ARB_texture_query_lod (no entry points) *)
   // GL_ARB_draw_indirect (ARB #87)
   // GL_ARB_gpu_shader5 (ARB #88) (none)
   // GL_ARB_gpu_shader_fp64 (ARB #89)
   // GL_ARB_shader_subroutine (ARB #90)
   // GL_ARB_tessellation_shader (ARB #91)
   // GL_ARB_texture_buffer_object_rgb32 (ARB #92) (none)
   // GL_ARB_transform_feedback2 (ARB #93)
   // GL_ARB_transform_feedback3 (ARB #94)


  // GL_VERSION_4_1


   //  ###########################################################
   //           function and procedure definitions for
   //                     GLU extensions
   //  ###########################################################

   // GLU extensions
   gluNurbsCallbackDataEXT: procedure(nurb: PGLUnurbs; userData: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   gluNewNurbsTessellatorEXT: function: PGLUnurbs; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   gluDeleteNurbsTessellatorEXT: procedure(nurb: PGLUnurbs); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

{$IFDEF SUPPORT_WGL}
   //  ###########################################################
   //           function and procedure definitions for
   //               ARB approved WGL extensions
   //  ###########################################################

   // WGL_buffer_region (ARB #4)
   wglCreateBufferRegionARB: function(DC: HDC; iLayerPlane: Integer; uType: TGLenum) : Integer; stdcall;
   wglDeleteBufferRegionARB: procedure(hRegion: Integer); stdcall;
   wglSaveBufferRegionARB: function(hRegion: Integer; x, y, width, height: Integer): BOOL; stdcall;
   wglRestoreBufferRegionARB: function(hRegion: Integer; x, y, width, height: Integer;
     xSrc, ySrc: Integer): BOOL; stdcall;

   // WGL_ARB_extensions_string (ARB #8)
   wglGetExtensionsStringARB: function(DC: HDC): PGLChar; stdcall;

   // WGL_ARB_pixel_format (ARB #9)
   wglGetPixelFormatAttribivARB: function(DC: HDC; iPixelFormat, iLayerPlane: Integer; nAttributes: TGLenum;
     const piAttributes: PGLint; piValues : PGLint) : BOOL; stdcall;
   wglGetPixelFormatAttribfvARB: function(DC: HDC; iPixelFormat, iLayerPlane: Integer; nAttributes: TGLenum;
     const piAttributes: PGLint; piValues: PGLFloat) : BOOL; stdcall;
   wglChoosePixelFormatARB: function(DC: HDC; const piAttribIList: PGLint; const pfAttribFList: PGLFloat;
     nMaxFormats: TGLuint; piFormats: PGLint; nNumFormats: PGLenum) : BOOL; stdcall;

   // WGL_make_current_read (ARB #10)
   wglMakeContextCurrentARB: function(hDrawDC: HDC; hReadDC: HDC; _hglrc: HGLRC): BOOL; stdcall;
   wglGetCurrentReadDCARB: function(): HDC; stdcall;

   // WGL_ARB_pbuffer (ARB #11)
   wglCreatePbufferARB: function(DC: HDC; iPixelFormat: TGLint; iWidth, iHeight : TGLint;
     const piAttribList: PGLint) : HPBUFFERARB; stdcall;
   wglGetPbufferDCARB: function(hPbuffer: HPBUFFERARB) : HDC; stdcall;
   wglReleasePbufferDCARB: function(hPbuffer: HPBUFFERARB; DC: HDC) : Integer; stdcall;
   wglDestroyPbufferARB: function(hPbuffer: HPBUFFERARB): BOOL; stdcall;
   wglQueryPbufferARB: function(hPbuffer: HPBUFFERARB; iAttribute : Integer;
     piValue: PGLint) : BOOL; stdcall;

   // WGL_ARB_render_texture (ARB #20)
   wglBindTexImageARB: function(hPbuffer: HPBUFFERARB; iBuffer: Integer): BOOL; stdcall;
   wglReleaseTexImageARB: function(hpBuffer: HPBUFFERARB; iBuffer: Integer): BOOL; stdcall;
   wglSetPbufferAttribARB: function(hpBuffer: HPBUFFERARB; const piAttribList: PGLint): BOOL; stdcall;

   // WGL_ARB_create_context (ARB #55)
   wglCreateContextAttribsARB: function(DC: HDC; hShareContext: HGLRC;
				     attribList: PGLint):HGLRC; stdcall;
   // WGL_NV_gpu_affinity
   wglEnumGpusNV: function(iGpuIndex: Cardinal; var hGpu: HGPUNV): Boolean;
   wglEnumGpuDevicesNV: function(hGpu: HGPUNV; iDeviceIndex: Cardinal; lpGpuDevice: PGPUDevice): Boolean;
   wglCreateAffinityDCNV: function(hGpuList: PHGPUNV): HDC;
   wglEnumGpusFromAffinityDCNV: function(hAffinityDC: HDC; iGpuIndex: Cardinal; var hGpu: HGPUNV): Boolean;
   wglDeleteDCNV: function(hdc: HDC): Boolean;
{$ENDIF}

{$IFDEF SUPPORT_WGL}
   //  ###########################################################
   //           function and procedure definitions for
   //               Vendor/EXT WGL extensions
   //  ###########################################################

   // WGL_EXT_swap_control (EXT #172)
   wglSwapIntervalEXT: function(interval : Integer) : BOOL; stdcall;
   wglGetSwapIntervalEXT: function : Integer; stdcall;
{$ENDIF}

{$IFDEF SUPPORT_GLX}
   //  ###########################################################
   //           function and procedure definitions for
   //               ARB approved GLX extensions
   //  ###########################################################

   // GLX 1.3 and later
   glXChooseFBConfig: function(dpy: PDisplay; screen: TGLInt; attribList: PGLInt; nitems: PGLInt): GLXFBConfig; cdecl;
   glXGetFBConfigAttrib: function(dpy: PDisplay; config: GLXFBConfig; attribute: TGLInt; value: PGLInt): TGLInt; cdecl;
   glXGetFBConfigs: function(dpy: PDisplay; screen: TGLInt; nelements: PGLInt): GLXFBConfig; cdecl;
   glXGetVisualFromFBConfig: function(dpy: PDisplay; config: GLXFBConfig): PXVisualInfo; cdecl;
   glXCreateWindow: function(dpy: PDisplay; config: GLXFBConfig; win: GLXWindow; const attribList: PGLInt): GLXWindow; cdecl;
   glXDestroyWindow: procedure(dpy: PDisplay; window: GLXWindow); cdecl;
   glXCreatePixmap: function(dpy: PDisplay; config: GLXFBConfig; pixmap: GLXPixmap; attribList: PGLInt): GLXPixmap; cdecl;
   glXDestroyPixmap: procedure(dpy: PDisplay; pixmap: GLXPixmap); cdecl;
   glXCreatePbuffer: function(dpy: PDisplay; config: GLXFBConfig; attribList: PGLInt): GLXPBuffer; cdecl;
   glXDestroyPbuffer: procedure(dpy: PDisplay; pbuf: GLXPBuffer); cdecl;
   glXQueryDrawable: procedure(dpy: PDisplay; draw: GLXDrawable; attribute: TGLInt; value: PGLuint); cdecl;
   glXCreateNewContext: function(dpy: PDisplay; config: GLXFBConfig; renderType: TGLInt; shareList: GLXContext; direct: TGLboolean): GLXContext; cdecl;
   glXMakeContextCurrent: function(dpy: PDisplay; draw: GLXDrawable; read: GLXDrawable; ctx: GLXContext): TGLboolean; cdecl;
   glXGetCurrentReadDrawable: function: GLXDrawable; cdecl;
   glXQueryContext: function(dpy: PDisplay; ctx: GLXContext; attribute: TGLInt; value: PGLInt): TGLInt; cdecl;
   glXSelectEvent: procedure(dpy: PDisplay; drawable: GLXDrawable; mask: TGLsizei); cdecl;
   glXGetSelectedEvent: procedure(dpy: PDisplay; drawable: GLXDrawable; mask: TGLsizei); cdecl;
   glXBindTexImageARB: function(dpy: PDisplay; pbuffer: GLXPbuffer; buffer: TGLInt): TGLboolean; cdecl;
   glXReleaseTexImageARB: function(dpy: PDisplay; pbuffer: GLXPbuffer; buffer: TGLint): TGLboolean; cdecl;
   glxDrawableAttribARB: function(dpy: PDisplay; draw: GLXDrawable; const attribList:PGLInt): TGLboolean; cdecl;

   //GLX 1.4
   // GLX_ARB_create_context (EXT #56)
   glXCreateContextAttribsARB: function(dpy: PDisplay; config: GLXFBConfig;
		    share_context: GLXContext; direct: TGLBoolean;
		    attrib_list: PGLint): GLXContext; cdecl;
   glXGetProcAddress: function(const name: PAnsiChar): pointer; cdecl;
   glXGetProcAddressARB: function (const name: PAnsiChar): pointer; cdecl;
{$ENDIF}

{$IFDEF SUPPORT_GLX}
   //  ###########################################################
   //           function and procedure definitions for
   //               Vendor/EXT GLX extensions
   //  ###########################################################

   // GLX_SGI_swap_control (EXT #40)
   glXSwapIntervalSGI: function(interval: TGLint): TGLint; cdecl;
   glXGetVideoSyncSGI: function(count: PGLuint): TGLInt; cdecl;
   glXWaitVideoSyncSGI: function(divisor: TGLInt; remainder: TGLInt; count: PGLuint): TGLInt; cdecl;
   glXFreeContextEXT: procedure(dpy: PDisplay; context: GLXContext); cdecl;
   glXGetContextIDEXT: function(const context: GLXContext): GLXContextID; cdecl;
   glXGetCurrentDisplayEXT: function: PDisplay; cdecl;
   glXImportContextEXT: function(dpy: PDisplay; contextID: GLXContextID): GLXContext; cdecl;
   glXQueryContextInfoEXT: function(dpy: PDisplay; context: GLXContext; attribute: TGLInt; value: PGLInt): TGLInt; cdecl;
   glXCopySubBufferMESA: procedure(dpy: PDisplay; drawable: GLXDrawable; x: TGLInt; y: TGLInt; width: TGLInt; height: TGLInt); cdecl;
   glXCreateGLXPixmapMESA: function(dpy: PDisplay; visual: PXVisualInfo; pixmap: XPixmap; cmap: XColormap): GLXPixmap; cdecl;
   glXReleaseBuffersMESA: function(dpy: PDisplay; d: GLXDrawable): TGLboolean; cdecl;
   glXSet3DfxModeMESA: function(mode: TGLint): TGLboolean; cdecl;

   glXBindTexImageEXT: procedure(dpy: PDisplay; drawable: GLXDrawable; buffer: TGLint; const attrib_list: PGLint); cdecl;
   glXReleaseTexImageEXT: procedure(dpy: PDisplay; drawable: GLXDrawable; buffer: TGLint); cdecl;

   //GLX 1.4
   glXMakeCurrentReadSGI: function(dpy: PDisplay; draw: GLXDrawable; read: GLXDrawable; ctx: GLXContext): TGLboolean; cdecl;
   glXGetCurrentReadDrawableSGI: function: GLXDrawable; cdecl;
   glXGetFBConfigAttribSGIX: function(dpy: PDisplay; config: GLXFBConfigSGIX; attribute: TGLInt; value: PGLInt):TGLInt; cdecl;
   glXChooseFBConfigSGIX: function(dpy: PDisplay; screen: TGLInt; attribList: PGLInt; nitems: PGLInt): GLXFBConfigSGIX; cdecl;
   glXCreateGLXPixmapWithConfigSGIX: function(dpy: PDisplay; config:GLXFBConfigSGIX;  pixmap: GLXPixmap): GLXPixmap; cdecl;
   glXCreateContextWithConfigSGIX: function(dpy: PDisplay; config: GLXFBConfigSGIX; renderType: TGLInt; shareList: GLXContext; direct: TGLboolean): GLXContext; cdecl;
   glXGetVisualFromFBConfigSGIX: function(dpy: PDisplay; config: GLXFBConfigSGIX): PXVisualInfo; cdecl;
   glXGetFBConfigFromVisualSGIX: function(dpy: PDisplay; vis: PXVisualInfo): GLXFBConfigSGIX; cdecl;
   glXCreateGLXPbufferSGIX: function(dpy: PDisplay; config: GLXFBConfigSGIX; width:PGLuint;  height: PGLuint; attribList: PGLInt): GLXPBufferSGIX; cdecl;
   glXDestroyGLXPbufferSGIX: procedure(dpy: PDisplay; pbuf: GLXFBConfigSGIX); cdecl;
   glXQueryGLXPbufferSGIX: function(dpy: PDisplay; pbuf: GLXFBConfigSGIX; attribute: PGLInt; value: PGLuint): TGLInt; cdecl;
   glXSelectEventSGIX: procedure(dpy: PDisplay; drawable: GLXDrawable; mask: PGLuint64); cdecl;
   glXGetSelectedEventSGIX: procedure(dpy: PDisplay; drawable: GLXDrawable; mask: PGLuint64); cdecl;
   glXCushionSGI: procedure(dpy: PDisplay; window: TWindow; cushion: TGLfloat); cdecl;
   glXBindChannelToWindowSGIX: function(dpy: PDisplay; screen: TGLInt; channel: TGLInt; window: TWindow): TGLInt; cdecl;
   glXChannelRectSGIX: function (dpy: PDisplay; screen: TGLInt; channel:TGLInt; x, y, w, h: TGLInt): TGLInt; cdecl;
   glXQueryChannelRectSGIX: function (dpy: PDisplay; screen: TGLInt; channel:TGLInt; dx, dy, dw, dh: TGLInt): TGLInt; cdecl;
   glXQueryChannelDeltasSGIX: function (dpy: PDisplay; screen: TGLInt; channel:TGLInt; x, y, w, h: TGLInt): TGLInt; cdecl;
   glXChannelRectSyncSGIX: function (dpy: PDisplay; screen: TGLInt; channel: TGLInt; synctype: TGLEnum): TGLInt; cdecl;
   glXJoinSwapGroupSGIX: procedure (dpy: PDisplay; drawable: GLXDrawable; member: GLXDrawable); cdecl;
   glXBindSwapBarrierSGIX: procedure (dpy: PDisplay; drawable: GLXDrawable; barrier: TGLInt); cdecl;
   glXQueryMaxSwapBarriersSGIX: procedure (dpy: PDisplay; screen: TGLInt; max: TGLInt); cdecl;
   glXQueryHyperpipeNetworkSGIX: function (dpy: PDisplay; npipes:PGLint): PGLXHyperpipeNetworkSGIX; cdecl;
   glXHyperpipeConfigSGIX: function(dpy: PDisplay; networkId, npipes: PGLint; cfg: PGLXHyperpipeConfigSGIX; hpId: PGLInt): TGLint; cdecl;
   glXQueryHyperpipeConfigSGIX: function(dpy: PDisplay; hpId: TGLInt; npipes: PGLInt): PGLXHyperpipeConfigSGIX; cdecl;
   glXDestroyHyperpipeConfigSGIX: function(dpy: PDisplay; hpId:TGLint): PGLInt; cdecl;
   glXBindHyperpipeSGIX: function(dpy: PDisplay; hpId: PGLint): PGLInt; cdecl;
   glXQueryHyperpipeBestAttribSGIX: function(dpy: PDisplay; timeSlice: TGLint; attrib: TGLint; size: TGLint; attribList: TGLint; returnAttribList: TGLint): TGLint; cdecl;
   glXHyperpipeAttribSGIX: function(dpy: PDisplay; timeSlice: TGLint; attrib: TGLint; size: TGLint; attribList: TGLint): TGLint; cdecl;
   glXQueryHyperpipeAttribSGIX: function(dpy: PDisplay; timeSlice: TGLint; attrib: TGLint; size: TGLint; returnAttribList: TGLint): TGLint; cdecl;
   glXGetAGPOffsetMESA: function(param: Pointer): PGLInt;cdecl;
   glXEnumerateVideoDevicesNV: function(dpy: PDisplay; screen: TGLInt; nelements: PGLint): PGLuint; cdecl;
   glXBindVideoDeviceNV: function(dpy: PDisplay; video_slot: TGLInt; video_device: TGLInt; attrib_list: PGLint): TGLint; cdecl;
   GetVideoDeviceNV: function(dpy: PDisplay; screen: TGLInt; numVideoDevices: TGLInt; pVideoDevice: GLXVideoDeviceNV): TGLInt; cdecl;

   glXAllocateMemoryNV: procedure( size: TGLsizei; readFrequency: TGLfloat; writeFrequency: TGLfloat; priority: TGLfloat ); cdecl;
   glXFreeMemoryNV: procedure ( GLvoid: pointer ); cdecl;

   glXReleaseVideoDeviceNV: function(dpy: PDisplay; screen: TGLInt; VideoDevice: GLXVideoDeviceNV): TGLuint; cdecl;
   glXBindVideoImageNV: function(dpy: PDisplay; VideoDevice: GLXVideoDeviceNV; pbuf: GLXPbuffer; iVideoBuffer: TGLInt): TGLuint; cdecl;
   glXReleaseVideoImageNV: function(dpy: PDisplay; pbuf: GLXPbuffer): TGLInt; cdecl;
   glXSendPbufferToVideoNV: function(dpy: PDisplay; pbuf: GLXPbuffer; iBufferType: TGLInt; pulCounterPbuffer: TGLuint64; bBlock: TGLboolean): TGLInt; cdecl;
   glXGetVideoInfoNV: function(dpy: PDisplay; screen: TGLInt; VideoDevice: GLXVideoDeviceNV; pulCounterOutputPbuffer: TGLuInt64; pulCounterOutputVideo: TGLuInt64): TGLInt; cdecl;
   glXJoinSwapGroupNV: function(dpy: PDisplay; drawable: GLXDrawable; group: TGLuint): TGLBoolean; cdecl;
   glXBindSwapBarrierNV: function(dpy: PDisplay; group: TGLuint; barrier: TGLuint): TGLboolean; cdecl;
   glXQuerySwapGroupNV: function(dpy: PDisplay; drawable: GLXDrawable; group: PGLuint; barrier: PGLuint): TGLBoolean; cdecl;
   glXQueryMaxSwapGroupsNV: function(dpy: PDisplay; screen: TGLInt; maxGroups: TGLuInt; maxBarriers: TGLuInt): TGLBoolean; cdecl;
   glXQueryFrameCountNV: function(dpy: PDisplay; screen: TGLInt; count: TGLuint): TGLBoolean; cdecl;
   glXResetFrameCountNV: function(dpy: PDisplay; screen: TGLInt): TGLBoolean; cdecl;
   glXBindVideoCaptureDeviceNV: function(dpy: PDisplay; video_capture_slot: TGLuint; device: GLXVideoCaptureDeviceNV): TGLint; cdecl;
   glXEnumerateVideoCaptureDevicesNV: function(dpy: PDisplay; screen: TGLInt; nelements: PGLint): GLXVideoCaptureDeviceNV; cdecl;
   glxLockVideoCaptureDeviceNV: procedure (dpy: PDisplay; device: GLXVideoCaptureDeviceNV); cdecl;
   glXQueryVideoCaptureDeviceNV: function(dpy: PDisplay; device: GLXVideoCaptureDeviceNV; attribute:TGLint; value: PGLint): TGLint; cdecl;
   glXReleaseVideoCaptureDeviceNV: procedure(dpy: PDisplay; device: GLXVideoCaptureDeviceNV); cdecl;
   glXSwapIntervalEXT: function(dpy: PDisplay; drawable: GLXDrawable; interval:TGLint): TGLint; cdecl;
   glXCopyImageSubDataNV: procedure(dpy: PDisplay; srcCtx: GLXContext; srcName: TGLuint; srcTarget: TGLenum;
                         srcLevel: TGLuint; srcX: TGLuint;
                         srcY: TGLuint; srcZ: TGLuint;
                         dstCtx:GLXContext; dstName:TGLuint; dstTarget: TGLenum; dstLevel: TGLint;
                         dstX: TGLint; dstY: TGLint; dstZ: TGLint; width: TGLsizei; height: TGLsizei;
                         depth: TGLsizei); cdecl;
{$ENDIF}

   //  ###########################################################
   //           function and procedure definitions for
   //                  ARB approved extensions
   //  ###########################################################

   // unknown ARB extension
   glSamplePassARB: procedure(pass: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   
   // GL_ARB_multitexture (ARB #1)
   glActiveTextureARB: procedure(target: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glClientActiveTextureARB: procedure(target: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord1dARB: procedure(target: TGLenum; s: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord1dVARB: procedure(target: TGLenum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord1fARB: procedure(target: TGLenum; s: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord1fVARB: procedure(target: TGLenum; v: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord1iARB: procedure(target: TGLenum; s: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord1iVARB: procedure(target: TGLenum; v: PGLInt); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord1sARB: procedure(target: TGLenum; s: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord1sVARB: procedure(target: TGLenum; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord2dARB: procedure(target: TGLenum; s, t: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord2dvARB: procedure(target: TGLenum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord2fARB: procedure(target: TGLenum; s, t: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord2fvARB: procedure(target: TGLenum; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord2iARB: procedure(target: TGLenum; s, t: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord2ivARB: procedure(target: TGLenum; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord2sARB: procedure(target: TGLenum; s, t: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord2svARB: procedure(target: TGLenum; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord3dARB: procedure(target: TGLenum; s, t, r: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord3dvARB: procedure(target: TGLenum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord3fARB: procedure(target: TGLenum; s, t, r: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord3fvARB: procedure(target: TGLenum; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord3iARB: procedure(target: TGLenum; s, t, r: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord3ivARB: procedure(target: TGLenum; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord3sARB: procedure(target: TGLenum; s, t, r: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord3svARB: procedure(target: TGLenum; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord4dARB: procedure(target: TGLenum; s, t, r, q: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord4dvARB: procedure(target: TGLenum; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord4fARB: procedure(target: TGLenum; s, t, r, q: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord4fvARB: procedure(target: TGLenum; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord4iARB: procedure(target: TGLenum; s, t, r, q: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord4ivARB: procedure(target: TGLenum; v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord4sARB: procedure(target: TGLenum; s, t, r, q: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoord4svARB: procedure(target: TGLenum; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_transpose_matrix (ARB #3)
   glLoadTransposeMatrixfARB: procedure(m: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glLoadTransposeMatrixdARB: procedure(m: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultTransposeMatrixfARB: procedure(m: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultTransposeMatrixdARB: procedure(m: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   
   // GL_ARB_multisample (ARB #5)
   glSampleCoverageARB: procedure(Value: TGLclampf; invert: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_texture_compression (ARB #12)
   glCompressedTexImage3DARB: procedure(target: TGLenum; level: TGLint; internalformat: TGLenum; Width, Height, depth: TGLsizei; border: TGLint; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexImage2DARB: procedure(target: TGLenum; level: TGLint; internalformat: TGLenum; Width, Height: TGLsizei; border: TGLint; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexImage1DARB: procedure(target: TGLenum; level: TGLint; internalformat: TGLenum; Width: TGLsizei; border: TGLint; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexSubImage3DARB: procedure(target: TGLenum; level: TGLint; xoffset, yoffset, zoffset: TGLint; width, height, depth: TGLsizei; Format: TGLenum; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexSubImage2DARB: procedure(target: TGLenum; level: TGLint; xoffset, yoffset: TGLint; width, height: TGLsizei; Format: TGLenum; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompressedTexSubImage1DARB: procedure(target: TGLenum; level: TGLint; xoffset: TGLint; width: TGLsizei; Format: TGLenum; imageSize: TGLsizei; data: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetCompressedTexImageARB: procedure(target: TGLenum; level: TGLint; img: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_point_parameter (ARB #14)
   glPointParameterfARB: procedure(pname: TGLenum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPointParameterfvARB: procedure(pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_vertex_blend (ARB #15) {deprecated?}
   glWeightbvARB: procedure(size: TGLint; weights: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWeightsvARB: procedure(size: TGLint; weights: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWeightivARB: procedure(size: TGLint; weights: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWeightfvARB: procedure(size: TGLint; weights: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWeightdvARB: procedure(size: TGLint; weights: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWeightubvARB: procedure(size: TGLint; weights: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWeightusvARB: procedure(size: TGLint; weights: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWeightuivARB: procedure(size: TGLint; weights: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWeightPointerARB: procedure(size: TGLint; _type: TGLenum; stride:TGLsizei; _pointer:pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexBlendARB: procedure(count: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
 
   // GL_ARB_matrix_palette (ARB #16) {deprecated?}
   glCurrentPaletteMatrixARB: procedure(index: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMatrixIndexubvARB: procedure(size: TGLint; indices: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMatrixIndexusvARB: procedure(size: TGLint; indices: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMatrixIndexuivARB: procedure(size: TGLint; indices: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMatrixIndexPointerARB: procedure(size: TGLint; _type: TGLenum; stride: TGLsizei; _pointer:pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_window_pos (ARB #25)
   glWindowPos2dARB: procedure(x,y : TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos2dvARB: procedure(v : PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos2fARB: procedure(x,y : TGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos2fvARB: procedure(v : PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos2iARB: procedure(x,y : TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos2ivARB: procedure(v : PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos2sARB: procedure(x,y : TGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos2svARB: procedure(v : PGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos3dARB: procedure(x,y,z : TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos3dvARB: procedure(v : PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos3fARB: procedure(x,y,z : TGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos3fvARB: procedure(v : PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos3iARB: procedure(x,y,z : TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos3ivARB: procedure(v : PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos3sARB: procedure(x,y,z : TGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWindowPos3svARB: procedure(v : PGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_vertex_program (ARB #26)
   glVertexAttrib1dARB: procedure(index: TGLuint; x: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1dvARB: procedure(index: TGLuint; const v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1fARB: procedure(index: TGLuint; x: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1fvARB: procedure(index: TGLuint; const v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1sARB: procedure(index: TGLuint; x: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1svARB: procedure(index: TGLuint; const v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2dARB: procedure(index: TGLuint; x: TGLdouble; y: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2dvARB: procedure(index: TGLuint; const v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2fARB: procedure(index: TGLuint; x: TGLfloat; y: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2fvARB: procedure(index: TGLuint; const v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2sARB: procedure(index: TGLuint; x: TGLshort; y: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2svARB: procedure(index: TGLuint; const v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3dARB: procedure(index: TGLuint; x: TGLdouble; y: TGLdouble; z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3dvARB: procedure(index: TGLuint; const v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3fARB: procedure(index: TGLuint; x: TGLfloat; y: TGLfloat; z: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3fvARB: procedure(index: TGLuint; const v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3sARB: procedure(index: TGLuint; x: TGLshort; y: TGLshort; z: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3svARB: procedure(index: TGLuint; const v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4NbvARB: procedure(index: TGLuint; const v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4NivARB: procedure(index: TGLuint; const v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4NsvARB: procedure(index: TGLuint; const v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4NubARB: procedure(index: TGLuint; x: TGLubyte; y: TGLubyte; z: TGLubyte; w: TGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4NubvARB: procedure(index: TGLuint; const v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4NuivARB: procedure(index: TGLuint; const v: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4NusvARB: procedure(index: TGLuint; const v: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4bvARB: procedure(index: TGLuint; const v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4dARB: procedure(index: TGLuint; x: TGLdouble; y: TGLdouble; z: TGLdouble; w: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4dvARB: procedure(index: TGLuint; const v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4fARB: procedure(index: TGLuint; x: TGLfloat; y: TGLfloat; z: TGLfloat; w: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4fvARB: procedure(index: TGLuint; const v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4ivARB: procedure(index: TGLuint; const v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4sARB: procedure(index: TGLuint; x: TGLshort; y: TGLshort; z: TGLshort; w: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4svARB: procedure(index: TGLuint; const v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4ubvARB: procedure(index: TGLuint; const v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4uivARB: procedure(index: TGLuint; const v: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4usvARB: procedure(index: TGLuint; const v: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribPointerARB: procedure(index: TGLuint; size: TGLint; _type: TGLenum; normalized: TGLboolean; stride: TGLsizei; const _pointer: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEnableVertexAttribArrayARB: procedure(index: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDisableVertexAttribArrayARB: procedure(index: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramStringARB: procedure(target: TGLenum; format: TGLenum; len: TGLsizei; const _string: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindProgramARB: procedure(target: TGLenum; _program: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteProgramsARB: procedure(n: TGLsizei; const programs: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenProgramsARB: procedure(n: TGLsizei; programs: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramEnvParameter4dARB: procedure(target: TGLenum; index: TGLuint; x: TGLdouble; y: TGLdouble; z: TGLdouble; w: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramEnvParameter4dvARB: procedure(target: TGLenum; index: TGLuint; const params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramEnvParameter4fARB: procedure(target: TGLenum; index: TGLuint; x: TGLfloat; y: TGLfloat; z: TGLfloat; w: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramEnvParameter4fvARB: procedure(target: TGLenum; index: TGLuint; const params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramLocalParameter4dARB: procedure(target: TGLenum; index: TGLuint; x: TGLdouble; y: TGLdouble; z: TGLdouble; w: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramLocalParameter4dvARB: procedure(target: TGLenum; index: TGLuint; const params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramLocalParameter4fARB: procedure(target: TGLenum; index: TGLuint; x: TGLfloat; y: TGLfloat; z: TGLfloat; w: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramLocalParameter4fvARB: procedure(target: TGLenum; index: TGLuint; const params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramEnvParameterdvARB: procedure(target: TGLenum; index: TGLuint; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramEnvParameterfvARB: procedure(target: TGLenum; index: TGLuint; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramLocalParameterdvARB: procedure(target: TGLenum; index: TGLuint; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramLocalParameterfvARB: procedure(target: TGLenum; index: TGLuint; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramivARB: procedure(target: TGLenum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramStringARB: procedure(target: TGLenum; pname: TGLenum; _string: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribdvARB: procedure(index: TGLuint; pname: TGLenum; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribfvARB: procedure(index: TGLuint; pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribivARB: procedure(index: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribPointervARB: procedure(index: TGLuint; pname: TGLenum; _pointer: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsProgramARB: function(_program: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_vertex_buffer_object (ARB #28)
   glBindBufferARB: procedure(target: TGLenum; buffer: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteBuffersARB: procedure(n: TGLsizei; const buffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenBuffersARB: procedure(n: TGLsizei; buffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsBufferARB: function(buffer: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBufferDataARB: procedure(target: TGLenum; size: TGLsizei; const data: Pointer; usage: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBufferSubDataARB: procedure(target: TGLenum; offset: TGLuint; size: TGLsizei; const data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBufferSubDataARB: procedure(target: TGLenum; offset: TGLuint; size: TGLsizei; data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMapBufferARB: function(target: TGLenum; access: TGLenum): Pointer; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUnmapBufferARB: function(target: TGLenum): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBufferParameterivARB: procedure(target: TGLenum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBufferPointervARB: procedure(target: TGLenum; pname: TGLenum; params: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_occlusion_query (ARB #29)
   glGenQueriesARB: procedure(n: TGLsizei; ids: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteQueriesARB: procedure(n: TGLsizei; const ids: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsQueryARB:  function(id: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBeginQueryARB: procedure(target: TGLenum; id: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndQueryARB: procedure(target: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryivARB: procedure(target: TGLEnum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryObjectivARB: procedure(id: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryObjectuivARB: procedure(id: TGLuint; pname: TGLenum; params: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_shader_objects (ARB #30)
   glDeleteObjectARB: procedure(obj: TGLhandleARB); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetHandleARB: function(pname: TGLenum): TGLhandleARB; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDetachObjectARB: procedure(containerObj: TGLhandleARB; attachedObj: TGLhandleARB); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCreateShaderObjectARB: function(shaderType: TGLenum): TGLhandleARB; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glShaderSourceARB: procedure(shaderObj: TGLhandleARB; count: TGLsizei; const _string: PGLPCharArray; const length: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCompileShaderARB: procedure(shaderObj: TGLhandleARB); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCreateProgramObjectARB: function(): TGLhandleARB; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glAttachObjectARB: procedure(containerObj: TGLhandleARB; obj: TGLhandleARB); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glLinkProgramARB: procedure(programObj: TGLhandleARB); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUseProgramObjectARB: procedure(programObj: TGLhandleARB); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glValidateProgramARB: procedure(programObj: TGLhandleARB); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1fARB: procedure(location: TGLint; v0: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2fARB: procedure(location: TGLint; v0: TGLfloat; v1: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3fARB: procedure(location: TGLint; v0: TGLfloat; v1: TGLfloat; v2: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4fARB: procedure(location: TGLint; v0: TGLfloat; v1: TGLfloat; v2: TGLfloat; v3: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1iARB: procedure(location: TGLint; v0: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2iARB: procedure(location: TGLint; v0: TGLint; v1: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3iARB: procedure(location: TGLint; v0: TGLint; v1: TGLint; v2: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4iARB: procedure(location: TGLint; v0: TGLint; v1: TGLint; v2: TGLint; v3: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1fvARB: procedure(location: TGLint; count: TGLsizei; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2fvARB: procedure(location: TGLint; count: TGLsizei; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3fvARB: procedure(location: TGLint; count: TGLsizei; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4fvARB: procedure(location: TGLint; count: TGLsizei; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1ivARB: procedure(location: TGLint; count: TGLsizei; value: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2ivARB: procedure(location: TGLint; count: TGLsizei; value: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3ivARB: procedure(location: TGLint; count: TGLsizei; value: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4ivARB: procedure(location: TGLint; count: TGLsizei; value: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix2fvARB: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix3fvARB: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix4fvARB: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; value: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetObjectParameterfvARB: procedure(obj: TGLhandleARB; pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetObjectParameterivARB: procedure(obj: TGLhandleARB; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetInfoLogARB: procedure(obj: TGLhandleARB; maxLength: TGLsizei; length: PGLsizei; infoLog: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetAttachedObjectsARB: procedure(containerObj: TGLhandleARB; maxCount: TGLsizei; count: PGLsizei; obj: PGLhandleARB); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformLocationARB: function(programObj: TGLhandleARB; const name: PGLChar): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveUniformARB: procedure(programObj: TGLhandleARB; index: TGLuint; maxLength: TGLsizei; length: PGLsizei; size: PGLint; _type: PGLenum; name: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformfvARB: procedure(programObj: TGLhandleARB; location: TGLint; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformivARB: procedure(programObj: TGLhandleARB; location: TGLint; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetShaderSourceARB: procedure(obj: TGLhandleARB; maxLength: TGLsizei; length: PGLsizei; source: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_vertex_shader (ARB #31)
   glBindAttribLocationARB: procedure(programObj: TGLhandleARB; index: TGLuint; const name: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveAttribARB: procedure(programObj: TGLhandleARB; index: TGLuint; maxLength: TGLsizei; length: PGLsizei; size: PGLint; _type: PGLenum; name: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetAttribLocationARB: function(programObj: TGLhandleARB; const name: PGLChar): TGLint; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_DrawBuffers (ARB #37)
   glDrawBuffersARB: procedure (n: TGLsizei; const bufs: PGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_color_buffer_float (ARB #39)
   glClampColorARB: procedure (target: TGLenum; clamp: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_draw_instanced (ARB #44)
   glDrawArraysInstancedARB: procedure(mode: TGLenum; first: TGLint; count: TGLsizei; primcount: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDrawElementsInstancedARB: procedure(mode: TGLenum; count: TGLSizei; _type: TGLenum; indices: PGLvoid; primcount: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_framebuffer_object (ARB #45)         
   glIsRenderbuffer: function(renderbuffer: TGLuint): TGLBoolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindRenderbuffer: procedure(target: TGLenum; renderbuffer: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteRenderbuffers: procedure(n: TGLsizei; renderbuffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenRenderbuffers: procedure(n: TGLSizei; renderbuffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glRenderbufferStorage: procedure(target: TGLenum; internalformat: TGLenum; width: TGLsizei;  height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glRenderbufferStorageMultisample: procedure(target: TGLenum; samples: TGLsizei; internalformat: TGLenum; width: TGLsizei; height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetRenderbufferParameteriv: procedure(target: TGLenum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsFramebuffer: function(framebuffer: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindFramebuffer: procedure(target: TGLenum; framebuffer: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteFramebuffers: procedure(n: TGLsizei; framebuffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenFramebuffers: procedure(n: TGLsizei; framebuffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCheckFramebufferStatus: function(target: TGLenum): TGLenum; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTexture1D: procedure(target: TGLenum; attachment: TGLenum; textarget: TGLenum; texture: TGLuint; level: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTexture2D: procedure(target: TGLenum; attachment: TGLenum; textarget: TGLenum; texture: TGLuint; level: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTexture3D: procedure(target: TGLenum; attachment: TGLenum; textarget: TGLenum; texture: TGLuint; level: TGLint; layer: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTextureLayer: procedure(target: TGLenum; attachment: TGLenum; texture: TGLuint; level: TGLint; layer: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferRenderbuffer: procedure(target: TGLenum; attachment: TGLenum; renderbuffertarget: TGLenum; renderbuffer: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetFramebufferAttachmentParameteriv: procedure(target: TGLenum; attachment: TGLenum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBlitFramebuffer: procedure(srcX0: TGLint; srcY0: TGLint; srcX1: TGLint; srcY1: TGLint; dstX0: TGLint; dstY0: TGLint; dstX1: TGLint; dstY1: TGLint; mask: TGLbitfield; filter: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenerateMipmap: procedure(target: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_geometry_shader4 (ARB #47)
   glProgramParameteriARB: procedure ( _program:TGLuint; pname:TGLenum; value: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTextureARB: procedure ( target:TGLenum;  attachment:TGLenum; texture:TGLuint;  level:TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTextureLayerARB: procedure ( target:TGLenum;  attachment:TGLenum; texture:TGLuint;  level:TGLint; layer:TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTextureFaceARB: procedure ( target:TGLenum;  attachment:TGLenum; texture:TGLuint;  level:TGLint; face:TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_instanced_arrays (ARB #49)
   glVertexAttribDivisorARB: procedure(index: TGLuint; divisor: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_map_buffer_range (ARB #50)
   glMapBufferRange: function(target: TGLenum; offset: TGLint{ptr}; length: TGLsizei{ptr}; access: TGLbitfield ): Pointer;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFlushMappedBufferRange: procedure( target: TGLenum; offset: TGLint{ptr}; length: TGLsizei{ptr} );{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_texture_buffer_object (ARB #51)
   glTexBufferARB: procedure(target: TGLenum; internalformat: TGLEnum; buffer: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_vertex_array_object (ARB #54)
   glBindVertexArray: procedure(_array: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteVertexArrays: procedure(n: TGLsizei; arrays: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenVertexArrays: procedure(n: TGLsizei; arrays: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsVertexArray: function(_array: TGLuint): TGLboolean;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_uniform_buffer_object (ARB #57)
   glGetUniformIndices: procedure(_program: TGLuint; uniformCount: TGLsizei; uniformNames: PGLPCharArray; uniformIndices: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveUniformsiv: procedure(_program: TGLuint; uniformCount: TGLsizei; uniformIndices: PGLuint; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveUniformName: procedure(_program: TGLuint; uniformIndex: TGLuint; bufSize: TGLsizei; length: PGLsizei; uniformName: PGLchar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformBlockIndex: function(_program: TGLuint; uniformBlockName: PGLchar): TGLuint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveUniformBlockiv: procedure(_program: TGLuint; uniformBlockIndex: TGLuint; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveUniformBlockName: procedure(_program: TGLuint; uniformBlockIndex: TGLuint; bufSize: TGLsizei; length: PGLsizei; uniformBlockName: PGLchar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformBlockBinding: procedure(_program: TGLuint; uniformBlockIndex: TGLuint; uniformBlockBinding: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_copy_buffer (ARB #59)
   glCopyBufferSubData: procedure(readTarget: TGLenum; writeTarget: TGLenum; readOffset: TGLintptr; writeOffset: TGLintptr; size: TGLsizeiptr);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_draw_elements_base_vertex (ARB #62)
   glDrawElementsBaseVertex: procedure(mode: TGLenum; count: TGLsizei; _type: TGLenum; indices: PGLvoid; basevertex: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDrawRangeElementsBaseVertex: procedure(mode: TGLenum; start: TGLuint; _end: TGLuint; count: TGLsizei; _type: TGLenum; indices: PGLvoid; basevertex: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDrawElementsInstancedBaseVertex: procedure(mode: TGLenum; count: TGLsizei; _type: TGLenum; indices: PGLvoid; primcount: TGLsizei; basevertex: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiDrawElementsBaseVertex: procedure(mode: TGLenum; count: PGLsizei; _type: TGLenum; var indices; primcount: TGLsizei; basevertex: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_provoking_vertex (ARB #64)
   glProvokingVertex: procedure(mode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_sync (ARB #66)
   glFenceSync: function(condition: TGLenum; flags: TGLbitfield): TGLsync;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsSync: function(sync: TGLsync): TGLboolean;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteSync: procedure(sync: TGLsync);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glClientWaitSync: function(sync: TGLsync; flags: TGLbitfield; timeout: TGLuint64): TGLenum;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glWaitSync: procedure(sync: TGLsync; flags: TGLbitfield; timeout: TGLuint64);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetInteger64v: procedure(pname: TGLenum; params: PGLint64);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetSynciv: procedure(sync: TGLsync; pname: TGLenum; bufSize: TGLsizei; length: PGLsizei; values: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_texture_multisample (ARB #67)
   glTexImage2DMultisample: procedure(target: TGLenum; samples: TGLsizei; internalformat: TGLint; width: TGLsizei; height: TGLsizei;
                               fixedsamplelocations: TGLboolean);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexImage3DMultisample: procedure(target: TGLenum; samples: TGLsizei; internalformat: TGLint; width: TGLsizei; height: TGLsizei; depth: TGLsizei;
                               fixedsamplelocations: TGLboolean);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetMultisamplefv: procedure(pname: TGLenum; index: TGLuint; val: PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSampleMaski: procedure(index: TGLuint; mask: TGLbitfield);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_draw_buffers_blend (ARB #69)
   glBlendEquationi: procedure(buf: TGLuint; mode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBlendEquationSeparatei: procedure(buf: TGLuint; modeRGB: TGLenum; modeAlpha: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBlendFunci: procedure(buf: TGLuint; src: TGLenum; dst: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBlendFuncSeparatei: procedure(buf: TGLuint; srcRGB: TGLenum; dstRGB: TGLenum; srcAlpha: TGLenum; dstAlpha: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_sample_shading (ARB #70)
   glMinSampleShading: procedure(value: TGLclampf);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_blend_func_extended (ARB #78)
   glBindFragDataLocationIndexed: procedure (_program: TGLuint; colorNumber: TGLuint; index: TGLuint; const name: PGLchar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetFragDataIndex: function (_program: TGLuint; const name: PGLchar): TGLint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_sampler_objects (ARB #81)
   glGenSamplers: procedure(count: TGLsizei; samplers: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteSamplers: procedure(count: TGLsizei; const samplers: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsSampler: function(sampler: TGLuint): TGLboolean;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindSampler: procedure(_unit: TGLuint; sampler: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSamplerParameteri: procedure(sampler: TGLuint; pname: TGLenum; param: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSamplerParameteriv: procedure(sampler: TGLuint; pname: TGLenum; const params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSamplerParameterf: procedure(sampler: TGLuint; pname: TGLenum; param: TGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSamplerParameterfv: procedure(sampler: TGLuint; pname: TGLenum; const params: PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSamplerParameterIiv: procedure(sampler: TGLuint; pname: TGLenum; const params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSamplerParameterIuiv: procedure(sampler: TGLuint; pname: TGLenum; const params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetSamplerParameteriv: procedure(sampler: TGLuint; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetSamplerParameterIiv: procedure(sampler: TGLuint; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetSamplerParameterfv: procedure(sampler: TGLuint; pname: TGLenum; params: PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetSamplerParameterIfv: procedure(sampler: TGLuint; pname: TGLenum; params: PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_timer_query (ARB #85)
   glQueryCounter: procedure(id: TGLuint; target: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryObjecti64v: procedure(id: TGLuint; pname: TGLenum; params: PGLint64);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryObjectui64v: procedure(id: TGLuint; pname: TGLenum; params: PGLuint64);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_vertex_type_2_10_10_10_rev (ARB #86)
   glVertexP2ui: procedure(_type: TGLenum; value: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexP2uiv: procedure(_type: TGLenum; const value: PGLuint );{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexP3ui: procedure(_type: TGLenum; value: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexP3uiv: procedure(_type: TGLenum; const value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexP4ui: procedure(_type: TGLenum; value: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexP4uiv: procedure(_type: TGLenum; const value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordP1ui: procedure(_type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordP1uiv: procedure(_type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordP2ui: procedure(_type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordP2uiv: procedure(_type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordP3ui: procedure(_type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordP3uiv: procedure(_type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordP4ui: procedure(_type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordP4uiv: procedure(_type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoordP1ui: procedure(texture: TGLenum; _type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoordP1uiv: procedure(texture: TGLenum; _type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoordP2ui: procedure(texture: TGLenum; _type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoordP2uiv: procedure(texture: TGLenum; _type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoordP3ui: procedure(texture: TGLenum; _type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoordP3uiv: procedure(texture: TGLenum; _type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoordP4ui: procedure(texture: TGLenum; _type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiTexCoordP4uiv: procedure(texture: TGLenum; _type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glNormalP3ui: procedure(_type: TGLenum; coords: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glNormalP3uiv: procedure(_type: TGLenum; const coords: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glColorP3ui: procedure(_type: TGLenum; color: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glColorP3uiv: procedure(_type: TGLenum; const color: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glColorP4ui: procedure(_type: TGLenum; color: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glColorP4uiv: procedure(_type: TGLenum; const color: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColorP3ui: procedure(_type: TGLenum; color: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColorP3uiv: procedure(_type: TGLenum; const color: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribP1ui: procedure(index: TGLuint; _type: TGLenum; normalized: TGLboolean; value: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribP1uiv: procedure(index: TGLuint; _type: TGLenum; normalized: TGLboolean; const value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribP2ui: procedure(index: TGLuint; _type: TGLenum; normalized: TGLboolean; value: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribP2uiv: procedure(index: TGLuint; _type: TGLenum; normalized: TGLboolean; const value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribP3ui: procedure(index: TGLuint; _type: TGLenum; normalized: TGLboolean; value: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribP3uiv: procedure(index: TGLuint; _type: TGLenum; normalized: TGLboolean; const value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribP4ui: procedure(index: TGLuint; _type: TGLenum; normalized: TGLboolean; value: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribP4uiv: procedure(index: TGLuint; _type: TGLenum; normalized: TGLboolean; const value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_draw_indirect (ARB #87)
   glDrawArraysIndirect: procedure(mode: TGLenum; const indirect: PGLvoid);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDrawElementsIndirect: procedure(mode: TGLenum; _type: TGLenum; const indirect: PGLvoid);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_gpu_shader_fp64 (ARB #89)
   glUniform1d: procedure(location: TGLint; x: TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2d: procedure(location: TGLint; x: TGLdouble; y: TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3d: procedure(location: TGLint; x: TGLdouble; y: TGLdouble; z: TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4d: procedure(location: TGLint; x: TGLdouble; y: TGLdouble; z: TGLdouble; w: TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1dv: procedure(location: TGLint; count: TGLsizei; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2dv: procedure(location: TGLint; count: TGLsizei; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3dv: procedure(location: TGLint; count: TGLsizei; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4dv: procedure(location: TGLint; count: TGLsizei; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix2dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix3dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix4dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix2x3dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix2x4dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix3x2dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix3x4dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix4x2dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformMatrix4x3dv: procedure(location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformdv: procedure(_program: TGLuint; location: TGLint; params : PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   // glProgramUniformXXX only valid if EXT_direct_state_access is available
   glProgramUniform1dEXT: procedure(_program: TGLuint; location: TGLint; x: TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniform2dEXT: procedure(_program: TGLuint; location: TGLint; x: TGLdouble; y: TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniform3dEXT: procedure(_program: TGLuint; location: TGLint; x: TGLdouble; y: TGLdouble; z: TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniform4dEXT: procedure(_program: TGLuint; location: TGLint; x: TGLdouble; y: TGLdouble; z: TGLdouble; w: TGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniform1dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniform2dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniform3dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniform4dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix2dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix3dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix4dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix2x3dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix2x4dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix3x2dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix3x4dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix4x2dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformMatrix4x3dvEXT: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; transpose: TGLboolean; const value: PGLdouble);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_shader_subroutine (ARB #90)
   glGetSubroutineUniformLocation: function(_program: TGLuint; shadertype: TGLenum; const name: PGLchar): TGLint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetSubroutineIndex: function(_program: TGLuint; shadertype: TGLenum; const name: PGLchar): TGLuint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveSubroutineUniformiv: procedure(_program: TGLuint; shadertype: TGLenum; index: TGLuint; pname: TGLenum; values: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveSubroutineUniformName: procedure(_program: TGLuint; shadertype: TGLenum; index: TGLuint; bufsize: TGLsizei; length: PGLsizei; name: PGLchar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveSubroutineName: procedure(_program: TGLuint; shadertype: TGLenum; index: TGLuint; bufsize: TGLsizei; length: PGLsizei; name: PGLchar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformSubroutinesuiv: procedure(shadertype: TGLenum; count: TGLsizei; const indices: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformSubroutineuiv: procedure(shadertype: TGLenum; location: TGLint; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramStageiv: procedure(_program: TGLuint; shadertype: TGLenum; pname: TGLenum; values: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_tessellation_shader (ARB #91)
   glPatchParameteri: procedure(pname: TGLenum; value: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPatchParameterfv: procedure(pname: TGLenum; const values: PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_transform_feedback2 (ARB #93)
   glBindTransformFeedback: procedure(target: TGLenum; id: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteTransformFeedbacks: procedure(n: TGLsizei; const ids: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenTransformFeedbacks: procedure(n: TGLsizei; ids: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsTransformFeedback: function(id: TGLuint): TGLboolean;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPauseTransformFeedback: procedure();{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glResumeTransformFeedback: procedure();{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDrawTransformFeedback: procedure(mode: TGLenum; id: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ARB_transform_feedback3 (ARB #94)
   glDrawTransformFeedbackStream: procedure(mode: TGLenum; id: TGLuint; stream: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBeginQueryIndexed: procedure(target: TGLenum; index: TGLuint; id: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndQueryIndexed: procedure(target: TGLenum; index: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryIndexediv: procedure(target: TGLenum; index: TGLuint; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}



//--------------- OpenGL function/procedure definitions for Vendor/EXT extensions ------------------

   //  ###########################################################
   //           function and procedure definitions for
   //                   Vendor/EXT extensions
   //  ###########################################################

   // Unknown Vendor/EXT functions
   glArrayElementArrayEXT: procedure(mode: TGLEnum; count: TGLsizei; pi: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_WIN_swap_hint (extension # not found)
   glAddSwapHintRectWIN: procedure(x, y: TGLint; width, height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_blend_color (EXT #2)
   glBlendColorEXT: procedure(red, green, blue: TGLclampf; alpha: TGLclampf); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_polygon_offset (EXT #3)
   glPolygonOffsetEXT: procedure(factor, bias: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_texture3D (EXT #6)
   glTexImage3DEXT: procedure(target: TGLenum; level: TGLint; internalformat: TGLenum; width, height, depth: TGLsizei; border: TGLint; Format, AType: TGLenum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_subtexture (EXT #9)
   glTexSubImage1DEXT: procedure(target: TGLEnum; level, xoffset: TGLint; width: TGLsizei; format, Atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexSubImage2DEXT: procedure(target: TGLEnum; level, xoffset, yoffset: TGLint; width, height: TGLsizei; format, Atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexSubImage3DEXT: procedure(target: TGLEnum; level, xoffset, yoffset, zoffset: TGLint; width, height, depth: TGLsizei; format, Atype: TGLEnum; pixels: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_copy_texture (EXT #10)
   glCopyTexImage1DEXT: procedure(target: TGLEnum; level: TGLint; internalFormat: TGLEnum; x, y: TGLint; width: TGLsizei; border: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCopyTexImage2DEXT: procedure(target: TGLEnum; level: TGLint; internalFormat: TGLEnum; x, y: TGLint; width, height: TGLsizei; border: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCopyTexSubImage1DEXT: procedure(target: TGLEnum; level, xoffset, x, y: TGLint; width: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCopyTexSubImage2DEXT: procedure(target: TGLEnum; level, xoffset, yoffset, x, y: TGLint; width, height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCopyTexSubImage3DEXT: procedure(target: TGLEnum; level, xoffset, yoffset, zoffset, x, y: TGLint; width, height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_texture_object (EXT #20)
   glGenTexturesEXT: procedure(n: TGLsizei; textures: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteTexturesEXT: procedure(n: TGLsizei; textures: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindTextureEXT: procedure(target: TGLEnum; texture: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPrioritizeTexturesEXT: procedure(n: TGLsizei; textures: PGLuint; priorities: PGLclampf); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glAreTexturesResidentEXT: function(n: TGLsizei; textures: PGLuint; residences: PGLBoolean): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsTextureEXT: function(texture: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_SGIS_multisample (EXT #25)
   glSampleMaskSGIS: procedure(Value: TGLclampf; invert: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSamplePatternSGIS: procedure(pattern: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_blend_minmax (EXT #37)
   glBlendEquationEXT: procedure(mode: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_paletted_texture (EXT #78)
   glColorTableEXT: procedure(target, internalFormat: TGLEnum; width: TGLsizei; format, atype: TGLEnum; data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glColorSubTableExt: procedure(target: TGLEnum; start, count: TGLsizei; format, atype: TGLEnum; data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetColorTableEXT: procedure(target, format, atype: TGLEnum; data: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetColorTableParameterfvEXT: procedure(target, pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetColorTableParameterivEXT: procedure(target, pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

//   glGetColorTableParameterfvEXT: procedure(target, pname: TGLEnum; params: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
//   glGetColorTableParameterivEXT: procedure(target, pname: TGLEnum; params: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_index_material (EXT #94)
   glIndexMaterialEXT: procedure(face: TGLEnum; mode: TGLEnum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_index_func (EXT #95)
   glIndexFuncEXT: procedure(func: TGLEnum; ref: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_compiled_vertex_array (EXT #97)
   glLockArraysEXT: procedure(first: TGLint; count: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUnlockArraysEXT: procedure; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_draw_range_elements (EXT #112)
   glDrawRangeElementsEXT: procedure(mode: TGLenum; start, Aend: TGLuint; Count: TGLsizei; Atype: TGLenum; indices: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_scene_marker (EXT #120)
   glBeginSceneEXT: procedure; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndSceneEXT: procedure; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_secondary_color (EXT #145)
   glSecondaryColor3bEXT: procedure(red, green, blue: TGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3bvEXT: procedure(v: PGLbyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3dEXT: procedure(red, green, blue: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3dvEXT: procedure(v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3fEXT: procedure(red, green, blue: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3fvEXT: procedure(v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3iEXT: procedure(red, green, blue: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3ivEXT: procedure(v: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3sEXT: procedure(red, green, blue: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3svEXT: procedure(v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3ubEXT: procedure(red, green, blue: TGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3ubvEXT: procedure(v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3uiEXT: procedure(red, green, blue: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3uivEXT: procedure(v: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3usEXT: procedure(red, green, blue: TGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColor3usvEXT: procedure(v: PGLushort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColorPointerEXT: procedure(Size: TGLint; Atype: TGLenum; stride: TGLsizei; p: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_multi_draw_arrays (EXT #148)
   glMultiDrawArraysEXT: procedure(mode: TGLenum; First: PGLint; Count: PGLsizei; primcount: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMultiDrawElementsEXT: procedure(mode: TGLenum; Count: PGLsizei; AType: TGLenum; var indices; primcount: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_fog_coord (EXT #149)
   glFogCoordfEXT: procedure(coord: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFogCoordfvEXT: procedure(coord: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFogCoorddEXT: procedure(coord: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFogCoorddvEXT: procedure(coord: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFogCoordPointerEXT: procedure(AType: TGLenum; stride: TGLsizei; p: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_blend_func_separate (EXT #173)
   glBlendFuncSeparateEXT: procedure(sfactorRGB, dfactorRGB, sfactorAlpha, dfactorAlpha: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_vertex_array_range (EXT #190)
   glFlushVertexArrayRangeNV: procedure; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexArrayRangeNV: procedure(Size: TGLsizei; p: pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   wglAllocateMemoryNV: function(size: TGLsizei; readFrequency, writeFrequency, priority: Single): Pointer; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   wglFreeMemoryNV: procedure(ptr: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_register_combiners (EXT #191)
   glCombinerParameterfvNV: procedure(pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCombinerParameterfNV: procedure(pname: TGLenum; param: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCombinerParameterivNV: procedure(pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCombinerParameteriNV: procedure(pname: TGLenum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCombinerInputNV: procedure(stage, portion, variable, input, mapping, componentUsage: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCombinerOutputNV: procedure(stage, portion, abOutput, cdOutput, sumOutput, scale, bias: TGLenum; abDotProduct, cdDotProduct, muxSum: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFinalCombinerInputNV: procedure(variable, input, mapping, componentUsage: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetCombinerInputParameterfvNV: procedure(stage, portion, variable, pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetCombinerInputParameterivNV: procedure(stage, portion, variable, pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetCombinerOutputParameterfvNV: procedure(stage, portion, pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetCombinerOutputParameterivNV: procedure(stage, portion, pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetFinalCombinerInputParameterfvNV: procedure(variable, pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetFinalCombinerInputParameterivNV: procedure(variable, pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_MESA_resize_buffers (EXT #196)
   glResizeBuffersMESA: procedure; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_3DFX_tbuffer (EXT #208)
   glTbufferMask3DFX: procedure(mask: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_multisample (EXT #209)
   glSampleMaskEXT: procedure(Value: TGLclampf; invert: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSamplePatternEXT: procedure(pattern: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_SGIS_texture_color_mask (EXT #214)
   glTextureColorMaskSGIS: procedure(red, green, blue, alpha: TGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_fence (EXT #222)
   glGenFencesNV: procedure(n: TGLsizei; fences: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteFencesNV: procedure(n: TGLsizei; fences: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSetFenceNV: procedure(fence: TGLuint; condition: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTestFenceNV: function(fence: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFinishFenceNV: procedure(fence: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsFenceNV: function(fence: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetFenceivNV: procedure(fence: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_vertex_program (EXT #233)
   glAreProgramsResidentNV: procedure(n: TGLSizei; programs: PGLuint; residences: PGLboolean); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindProgramNV: procedure(target: TGLenum; id: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteProgramsNV: procedure(n: TGLSizei; programs: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glExecuteProgramNV: procedure(target: TGLenum; id: TGLuint; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenProgramsNV: procedure(n: TGLSizei; programs: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramParameterdvNV: procedure (target: TGLenum; index: TGLuint; pname: TGLenum; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramParameterfvNV: procedure (target: TGLenum; index: TGLuint; pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramivNV: procedure (id: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetProgramStringNV: procedure (id: TGLuint; pname: TGLenum; programIdx: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetTrackMatrixivNV: procedure (target: TGLenum; address: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribdvNV: procedure (index: TGLuint; pname: TGLenum; params: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribfvNV: procedure (index: TGLuint; pname: TGLenum; params: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribivNV: procedure (index: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribPointervNV: procedure (index: TGLuint; pname: TGLenum; pointer: PGLPointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsProgramNV: function (id: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glLoadProgramNV: procedure (target: TGLenum; id: TGLuint; len: TGLSizei; programIdx: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramParameter4dNV: procedure (target: TGLenum; index: TGLuint; x, y, z, w: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramParameter4dvNV: procedure (target: TGLenum; index: TGLuint; v: PGLdouble ); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramParameter4fNV: procedure (target: TGLenum; index: TGLuint; x, y, z, w: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramParameter4fvNV: procedure (target: TGLenum; index: TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramParameters4dvNV: procedure (target: TGLenum; index: TGLuint; count: TGLSizei; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramParameters4fvNV: procedure (target: TGLenum; index: TGLuint; count: TGLSizei; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glRequestResidentProgramsNV: procedure (n: TGLSizei; programs: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTrackMatrixNV: procedure (target: TGLenum; address: TGLuint; matrix: TGLenum; transform: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribPointerNV: procedure (index: TGLuint; fsize: TGLint; vertextype: TGLenum; stride: TGLSizei; pointer: Pointer); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1dNV: procedure (index: TGLuint; x: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1dvNV: procedure (index: TGLuint; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1fNV: procedure (index: TGLuint; x: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1fvNV: procedure (index: TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1sNV: procedure (index: TGLuint; x: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib1svNV: procedure (index: TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2dNV: procedure (index: TGLuint; x: TGLdouble; y: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2dvNV: procedure (index: TGLuint; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2fNV: procedure (index: TGLuint; x: TGLfloat; y: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2fvNV: procedure (index: TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2sNV: procedure (index: TGLuint; x: TGLshort; y: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib2svNV: procedure (index: TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3dNV: procedure (index: TGLuint; x: TGLdouble; y: TGLdouble; z: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3dvNV: procedure (index: TGLuint; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3fNV: procedure (index: TGLuint; x: TGLfloat; y: TGLfloat; z: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3fvNV: procedure (index: TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3sNV: procedure (index: TGLuint; x: TGLshort; y: TGLshort; z: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib3svNV: procedure (index: TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4dNV: procedure (index: TGLuint; x: TGLdouble; y: TGLdouble; z: TGLdouble; w: TGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4dvNV: procedure (index: TGLuint; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4fNV: procedure(index: TGLuint; x: TGLfloat; y: TGLfloat; z: TGLfloat; w: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4fvNV: procedure(index: TGLuint; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4sNV: procedure (index: TGLuint; x: TGLshort; y: TGLshort; z: TGLdouble; w: TGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4svNV: procedure (index: TGLuint; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttrib4ubvNV: procedure (index: TGLuint; v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs1dvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs1fvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs1svNV: procedure (index: TGLuint; count: TGLSizei; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs2dvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs2fvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs2svNV: procedure (index: TGLuint; count: TGLSizei; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs3dvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs3fvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs3svNV: procedure (index: TGLuint; count: TGLSizei; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs4dvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLdouble); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs4fvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs4svNV: procedure (index: TGLuint; count: TGLSizei; v: PGLshort); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribs4ubvNV: procedure (index: TGLuint; count: TGLSizei; v: PGLubyte); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_occlusion_query (EXT #261)
   glGenOcclusionQueriesNV: procedure(n: TGLsizei; ids: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteOcclusionQueriesNV: procedure(n: TGLsizei; const ids: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsOcclusionQueryNV: function(id: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBeginOcclusionQueryNV: procedure(id: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndOcclusionQueryNV: procedure; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetOcclusionQueryivNV: procedure(id: TGLuint; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetOcclusionQueryuivNV: procedure(id: TGLuint; pname: TGLenum; params: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_point_sprite (EXT #262)
   glPointParameteriNV: procedure(pname: TGLenum; param: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPointParameterivNV: procedure(pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_stencil_two_side (EXT #268)
   glActiveStencilFaceEXT: procedure(face: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_ATI_draw_buffers (EXT #277)
   glDrawBuffersATI: procedure(n: TGLsizei; const bufs: PGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_primitive_restart (EXT #285)
   glPrimitiveRestartNV: procedure();{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glPrimitiveRestartIndexNV: procedure(index: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_depth_bounds_test (EXT #297)
   glDepthBoundsEXT: procedure(zmin: TGLclampd; zmax: TGLclampd);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_blend_equation_separate (EXT #299)
   glBlendEquationSeparateEXT: procedure(modeRGB: TGLenum; modeAlpha: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_framebuffer_object (EXT #310)
   glIsRenderbufferEXT: function(renderbuffer: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindRenderbufferEXT: procedure(target: TGLenum; renderbuffer: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteRenderbuffersEXT: procedure(n: TGLsizei; renderbuffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenRenderbuffersEXT: procedure(n: TGLsizei; renderbuffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glRenderbufferStorageEXT: procedure(target: TGLenum; internalformat: TGLenum; width: TGLsizei; height: TGLsizei); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetRenderbufferParameterivEXT: procedure(target: TGLenum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsFramebufferEXT: function(framebuffer: TGLuint): TGLboolean; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindFramebufferEXT: procedure(target: TGLenum; framebuffer: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDeleteFramebuffersEXT: procedure(n: TGLsizei; framebuffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenFramebuffersEXT: procedure(n: TGLsizei; framebuffers: PGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glCheckFramebufferStatusEXT: function(target: TGLenum): TGLenum; {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTexture1DEXT: procedure(target: TGLenum; attachment: TGLenum; textarget: TGLenum; texture: TGLuint; level: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTexture2DEXT: procedure(target: TGLenum; attachment: TGLenum; textarget: TGLenum; texture: TGLuint; level: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTexture3DEXT: procedure(target: TGLenum; attachment: TGLenum; textarget: TGLenum; texture: TGLuint; level: TGLint; zoffset: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferRenderbufferEXT: procedure(target: TGLenum; attachment: TGLenum; renderbuffertarget: TGLenum; renderbuffer: TGLuint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetFramebufferAttachmentParameterivEXT: procedure(target: TGLenum; attachment: TGLenum; pname: TGLenum; params: PGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGenerateMipmapEXT: procedure(target: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_stencil_clear_tag (EXT #314)
   glStencilClearTagEXT: procedure(stencilTagBits: TGLsizei; stencilClearTag: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_framebuffer_blit (#316)
   glBlitFramebufferEXT: procedure(srcX0: TGLint; srcY0: TGLint; srcX1: TGLint; srcY1: TGLint; dstX0: TGLint; dstY0: TGLint; dstX1: TGLint; dstY1: TGLint;
                            mask: TGLbitfield; filter: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_framebuffer_multisample (#317)
   glRenderbufferStorageMultisampleEXT: procedure(target: TGLenum; samples: TGLsizei; internalformat: TGLenum; width: TGLsizei; height: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_timer_query (#319)
   glGetQueryObjecti64vEXT: procedure(id: TGLuint; pname: TGLenum; params: PGLint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetQueryObjectui64vEXT: procedure(id: TGLuint; pname: TGLenum; params: PGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_gpu_program_parameters (EXT #320)
   glProgramEnvParameters4fvEXT:   procedure(target:TGLenum; index:TGLuint; count:TGLsizei; const params:PGLfloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramLocalParameters4fvEXT: procedure(target:TGLenum; index:TGLuint; count:TGLsizei; const params:PGLFloat);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_geometry_program4 (EXT #323)
   glProgramVertexLimitNV: procedure (target: TGLenum; limit: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_geometry_shader4 (EXT #324)
   glProgramParameteriEXT: procedure ( _program:TGLuint; pname:TGLenum; value: TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTextureEXT: procedure ( target:TGLenum;  attachment:TGLenum; texture:TGLuint;  level:TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTextureLayerEXT: procedure ( target:TGLenum;  attachment:TGLenum; texture:TGLuint;  level:TGLint; layer:TGLint); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFramebufferTextureFaceEXT: procedure ( target:TGLenum;  attachment:TGLenum; texture:TGLuint;  level:TGLint; face:TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_gpu_shader4 (EXT #326)
   glVertexAttribI1iEXT: procedure(index: TGLuint; x: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI2iEXT: procedure(index: TGLuint; x: TGLint; y: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI3iEXT: procedure(index: TGLuint; x: TGLint; y: TGLint; z: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4iEXT: procedure(index: TGLuint; x: TGLint; y: TGLint; z: TGLint; w: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI1uiEXT: procedure(index: TGLuint; x: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI2uiEXT: procedure(index: TGLuint; x: TGLuint; y: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI3uiEXT: procedure(index: TGLuint; x: TGLuint; y: TGLuint; z: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4uiEXT: procedure(index: TGLuint; x: TGLuint; y: TGLuint; z: TGLuint; w: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI1ivEXT: procedure(index: TGLuint; v:PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI2ivEXT: procedure(index: TGLuint; v:PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI3ivEXT: procedure(index: TGLuint; v:PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4ivEXT: procedure(index: TGLuint; v:PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI1uivEXT: procedure(index: TGLuint; v:PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI2uivEXT: procedure(index: TGLuint; v:PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI3uivEXT: procedure(index: TGLuint; v:PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4uivEXT: procedure(index: TGLuint; v:PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4bvEXT: procedure(index: TGLuint; v:PGLbyte);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4svEXT: procedure(index: TGLuint; v:PGLshort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4ubvEXT: procedure(index: TGLuint; v: PGLUbyte);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribI4usvEXT: procedure(index: TGLuint; v: PGLushort);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribIPointerEXT: procedure(index: TGLuint; size: TGLint; _type: TGLenum;
                                stride: TGLsizei; _pointer: pointer);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribIivEXT: procedure(index: TGLuint; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetVertexAttribIuivEXT: procedure(index: TGLuint; pname: TGLenum; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1uiEXT: procedure(location: TGLInt; v0: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2uiEXT: procedure(location: TGLInt; v0: TGLuint; v1: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3uiEXT: procedure(location: TGLInt; v0: TGLuint; v1: TGLuint; v2: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4uiEXT: procedure(location: TGLInt; v0: TGLuint; v1: TGLuint; v2: TGLuint; v3: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform1uivEXT: procedure(location: TGLInt; count: TGLsizei; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform2uivEXT: procedure(location: TGLInt; count: TGLsizei; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform3uivEXT: procedure(location: TGLInt; count: TGLsizei; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniform4uivEXT: procedure(location: TGLInt; count: TGLsizei; value: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformuivEXT: procedure(_program: TGLuint; location: TGLint; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindFragDataLocationEXT: procedure(_program: TGLuint; colorNumber: TGLuint; name: PGLChar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetFragDataLocationEXT: function(_program: TGLuint; name: PGLChar): TGLint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_draw_instanced (#327)
   glDrawArraysInstancedEXT: procedure(mode: TGLenum; first: TGLint; count: TGLsizei; primcount: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDrawElementsInstancedEXT: procedure(mode: TGLenum; count: TGLSizei; _type: TGLenum; indices: PGLvoid; primcount: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_packed_float (#328)
   // WGL_EXT_pixel_format_packed_float
   // GLX_EXT_fbconfig_packed_float


   // GL_EXT_texture_array (#329)
   //glFramebufferTextureLayerEXT: procedure(target: TGLenum; attachment: TGLenum;
   //                                texture: TGLuint; level: TGLint; layer: TGLint);


   // GL_EXT_texture_buffer_object (#330)
   glTexBufferEXT: procedure(target: TGLenum; internalformat: TGLenum; buffer: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_draw_buffers2 (#340)
   glColorMaskIndexedEXT: procedure(buf: TGLuint; r: TGLboolean; g: TGLboolean; b: TGLboolean; a: TGLboolean);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBooleanIndexedvEXT: procedure(value: TGLenum; index: TGLuint; data: PGLboolean);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetIntegerIndexedvEXT: procedure(value: TGLenum; index: TGLuint; data: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEnableIndexedEXT: procedure(target: TGLenum; index: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glDisableIndexedEXT: procedure(target: TGLenum; index: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsEnabledIndexedEXT: function(target: TGLenum; index: TGLuint): TGLboolean;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_transform_feedback (#341)
   glBindBufferRangeNV: procedure(target: TGLenum; index: TGLuint; buffer: TGLuint; offset: TGLintptr; size: TGLsizeiptr);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindBufferOffsetNV: procedure(target: TGLenum; index: TGLuint; buffer: TGLuint; offset: TGLintptr);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindBufferBaseNV: procedure(target: TGLenum; index: TGLuint; buffer: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTransformFeedbackAttribsNV: procedure(count: TGLsizei; attribs: PGLint; bufferMode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTransformFeedbackVaryingsNV: procedure(_program: TGLuint; count: TGLsizei; locations: PGLint; bufferMode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBeginTransformFeedbackNV: procedure(primitiveMode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndTransformFeedbackNV: procedure();{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   glGetVaryingLocationNV: function(_program: TGLuint; name: PGLChar): TGLint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetActiveVaryingNV: procedure(_program: TGLuint; index: TGLuint; bufSize: TGLsizei; length: PGLsizei; size: PGLsizei;  _type: TGLenum; name: PGLChar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glActiveVaryingNV: procedure(_program: TGLuint; name: PGLChar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetTransformFeedbackVaryingNV: procedure(_program: TGLuint; index: TGLuint; location: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}


   // GL_EXT_bindable_uniform (#342)
   glUniformBufferEXT: procedure(_program: TGLUint; location: TGLint; buffer: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformBufferSizeEXT: function(_program: TGLuint; location: TGLint): TGLint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformOffsetEXT: function(_program: TGLuint; location: TGLint): PGLint;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_texture_integer (#343)
   glClearColorIiEXT: procedure(r: TGLint; g: TGLint; b: TGLint; a: TGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glClearColorIuiEXT: procedure(r: TGLuint; g: TGLuint; b: TGLuint; a: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexParameterIivEXT: procedure(target: TGLenum; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexParameterIuivEXT: procedure(target: TGLenum; pname: TGLenum; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetTexParameterIivEXT: procedure(target: TGLenum; pname: TGLenum; params: PGLint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetTexParameterIuivEXT: procedure(target: TGLenum; pname: TGLenum; params: PGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_conditional_render (#346)
   glBeginConditionalRenderNV: procedure(id: TGLuint; mode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndConditionalRenderNV: procedure();{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_EXT_transform_feedback (#352)
   glBindBufferRangeEXT: procedure(target: TGLenum; index: TGLuint; buffer: TGLuint;
                            offset:TGLintptr; size: TGLsizeiptr);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindBufferOffsetEXT: procedure(target: TGLenum; index: TGLuint; buffer: TGLuint; offset:TGLintptr);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBindBufferBaseEXT: procedure(target: TGLenum; index: TGLuint; buffer: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glBeginTransformFeedbackEXT: procedure(primitiveMode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEndTransformFeedbackEXT: procedure();{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTransformFeedbackVaryingsEXT: procedure(_program: TGLuint; count: TGLsizei; const varyings: PGLPCharArray; bufferMode: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetTransformFeedbackVaryingEXT: procedure(_program: TGLuint; index: TGLuint; bufSize: TGLsizei; length: PGLsizei; size: PGLsizei; _type: PGLenum; name: PGLChar);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_AMD_vertex_shader_tessellator (#363)
   glTessellationFactorAMD: procedure(factor: TGLfloat); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTessellationModeAMD: procedure(mode: TGLenum); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_copy_image (#376)
   glCopyImageSubDataNV: procedure(srcName: TGLuint; srcTarget: TGLenum; srcLevel: TGLint; srcX: TGLint; srcY: TGLint; srcZ: TGLint; dstName: TGLuint; dstTarget: TGLenum; dstLevel: TGLint; dstX: TGLint; dstY: TGLint; dstZ: TGLint;
     width: TGLsizei; height: TGLsizei; depth: TGLsizei);  {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_shader_buffer_load (#379)
   glMakeBufferResidentNV: procedure(target: TGLenum; access: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMakeBufferNonResidentNV: procedure(target: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsBufferResidentNV: function(target: TGLenum): TGLboolean;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMakeNamedBufferResidentNV: procedure(buffer: TGLuint; access: TGLenum);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glMakeNamedBufferNonResidentNV: procedure(buffer: TGLuint);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIsNamedBufferResidentNV: function (buffer: TGLuint): TGLboolean;{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetBufferParameterui64vNV: procedure(target: TGLenum; pname: TGLenum; params: PGLuint64EXT );{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetNamedBufferParameterui64vNV: procedure(buffer: TGLuint; pname: TGLenum; params: PGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetIntegerui64vNV: procedure(value: TGLenum; result: PGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformui64NV: procedure(location: TGLint; value: TGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glUniformui64vNV: procedure(location: TGLint; count: TGLsizei; const value: PGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetUniformui64vNV: procedure(_program: TGLuint; location: TGLint; params: PGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformui64NV: procedure(_program: TGLuint; location: TGLint; value: TGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glProgramUniformui64vNV: procedure(_program: TGLuint; location: TGLint; count: TGLsizei; const value: PGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // GL_NV_vertex_buffer_unified_memory (#380)
   glBufferAddressRangeNV: procedure(pname: TGLenum; index: TGLuint; address: TGLuint64EXT; length: TGLsizeiptr);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexFormatNV: procedure(size: TGLint; _type: TGLenum; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glNormalFormatNV: procedure(_type: TGLenum; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glColorFormatNV: procedure(size: TGLint; _type: TGLenum; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glIndexFormatNV: procedure(_type: TGLenum; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glTexCoordFormatNV: procedure(size: TGLint; _type: TGLenum; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glEdgeFlagFormatNV: procedure(stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glSecondaryColorFormatNV: procedure(size: TGLint; _type: TGLenum; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glFogCoordFormatNV: procedure(_type: TGLenum; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribFormatNV: procedure(index: TGLuint; size: TGLint; _type: TGLenum; normalized: TGLboolean; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glVertexAttribIFormatNV: procedure(index: TGLuint; size: TGLint; _type: TGLenum; stride: TGLsizei);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glGetIntegerui64i_vNV: procedure(value: TGLenum; index: TGLuint; result: PGLuint64EXT);{$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

   // Special Gremedy debugger extension
   glFrameTerminatorGREMEDY: procedure(); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
   glStringMarkerGREMEDY: procedure(len: TGLsizei; str: PGLChar); {$IFDEF MSWINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}


//------------------------------------------------------------------------------

function GLGetProcAddress(ProcName: PGLChar): Pointer;
procedure ReadExtensions;
procedure ReadImplementationProperties;
{$IFDEF SUPPORT_WGL}
procedure ReadWGLExtensions;
procedure ReadWGLImplementationProperties;
{$ENDIF}
{$IFDEF SUPPORT_GLX}

procedure ReadGLXExtensions;
procedure ReadGLXImplementationProperties;
{$ENDIF}

procedure CloseOpenGL;
function InitOpenGL : Boolean;
function InitOpenGLFromLibrary(const GLName, GLUName : String) : Boolean;
function IsOpenGLInitialized: Boolean;

// compatibility routines
procedure UnloadOpenGL;
function LoadOpenGL : Boolean;
function LoadOpenGLFromLibrary(const GLName, GLUName: String): Boolean;
function IsOpenGLLoaded : Boolean;

function IsMesaGL : Boolean;
procedure TrimAndSplitVersionString(Buffer: String; out Max, Min: Integer);
function IsVersionMet(MajorVersion,MinorVersion, actualMajorVersion, actualMinorVersion:Integer): boolean;
function IsOpenGLVersionMet(MajorVersion,MinorVersion: Integer): boolean;

type
  EOpenGLError = class(Exception);

procedure CheckOpenGLError; //Gets the oldest error and tries to clear the error queue
procedure ClearGLError; //Clears all pending OpenGL errors
procedure RaiseOpenGLError(const msg : String); //Raises an EOpenGLError with 'msg' error string

var
   vIgnoreOpenGLErrors : Boolean = false;

// ------------------------------------------------------------------
implementation
// ------------------------------------------------------------------

// ************** Windows specific ********************
{$IFDEF MSWINDOWS}
const
   INVALID_MODULEHANDLE = 0;
var
   GLHandle: HINST;
   GLUHandle: HINST;

function GLGetProcAddress(ProcName: PGLChar):Pointer;
begin
  result := wglGetProcAddress(ProcName);
end;
{$ENDIF}

// ************** UNIX specific ********************
{$IFDEF Unix}
const
   INVALID_MODULEHANDLE = 0;//nil;
var
   GLHandle: TLibHandle = 0;//Pointer;
   GLUHandle: TLibHandle = 0;//Pointer;

function GLGetProcAddress(ProcName: PGLChar):Pointer;
begin
  {$IFDEF SUPPORT_GLX}
  if @glXGetProcAddress<>nil then
    result := glXGetProcAddress(ProcName);
    if result <> nil then exit;
  if @glXGetProcAddressARB<>nil then
    result := glXGetProcAddressARB(ProcName);
    if result <> nil then exit;
  {$ENDIF}
  result := GetProcAddress(GLHandle, ProcName);
end;
{$ENDIF}

procedure CheckOpenGLError;
var
   GLError : LongWord;
   Count : Word;
begin
	GLError:=glGetError;
	if GLError <> GL_NO_ERROR then begin
		Count:=0;
      // Because under some circumstances reading the error code creates a new error
      // and thus hanging up the thread, we limit the loop to 6 reads.
      try
         while (glGetError <> GL_NO_ERROR) and (Count < 6) do Inc(Count);
      except
         // Egg : ignore exceptions here, will perhaps avoid problem expressed before
		end;
      if not vIgnoreOpenGLErrors then
   		raise EOpenGLError.Create(String(gluErrorString(GLError)));
	end;
end;

procedure ClearGLError;
var
   n : Integer;
begin
   n:=0;
   while (glGetError<>GL_NO_ERROR) and (n<6) do Inc(n);
end;

procedure RaiseOpenGLError(const msg : String);
begin
   raise EOpenGLError.Create(msg);
end;

// ************** Extensions ********************
procedure ReadExtensions;
begin
   glBlendColor := GLGetProcAddress('glBlendColor');
   glBlendEquation := GLGetProcAddress('glBlendEquation');
   glDrawRangeElements := GLGetProcAddress('glDrawRangeElements');
   glColorTable := GLGetProcAddress('glColorTable');
   glColorTableParameterfv := GLGetProcAddress('glColorTableParameterfv');
   glColorTableParameteriv := GLGetProcAddress('glColorTableParameteriv');
   glCopyColorTable := GLGetProcAddress('glCopyColorTable');
   glGetColorTable := GLGetProcAddress('glGetColorTable');
   glGetColorTableParameterfv := GLGetProcAddress('glGetColorTableParameterfv');
   glGetColorTableParameteriv := GLGetProcAddress('glGetColorTableParameteriv');
   glColorSubTable := GLGetProcAddress('glColorSubTable');
   glCopyColorSubTable := GLGetProcAddress('glCopyColorSubTable');
   glConvolutionFilter1D := GLGetProcAddress('glConvolutionFilter1D');
   glConvolutionFilter2D := GLGetProcAddress('glConvolutionFilter2D'); 
   glConvolutionParameterf := GLGetProcAddress('glConvolutionParameterf');
   glConvolutionParameterfv := GLGetProcAddress('glConvolutionParameterfv');
   glConvolutionParameteri := GLGetProcAddress('glConvolutionParameteri'); 
   glConvolutionParameteriv := GLGetProcAddress('glConvolutionParameteriv');
   glCopyConvolutionFilter1D := GLGetProcAddress('glCopyConvolutionFilter1D');
   glCopyConvolutionFilter2D := GLGetProcAddress('glCopyConvolutionFilter2D');
   glGetConvolutionFilter := GLGetProcAddress('glGetConvolutionFilter');
   glGetConvolutionParameterfv := GLGetProcAddress('glGetConvolutionParameterfv');
   glGetConvolutionParameteriv := GLGetProcAddress('glGetConvolutionParameteriv');
   glGetSeparableFilter := GLGetProcAddress('glGetSeparableFilter');
   glSeparableFilter2D := GLGetProcAddress('glSeparableFilter2D');
   glGetHistogram := GLGetProcAddress('glGetHistogram');
   glGetHistogramParameterfv := GLGetProcAddress('glGetHistogramParameterfv');
   glGetHistogramParameteriv := GLGetProcAddress('glGetHistogramParameteriv');
   glGetMinmax := GLGetProcAddress('glGetMinmax');
   glGetMinmaxParameterfv := GLGetProcAddress('glGetMinmaxParameterfv');
   glGetMinmaxParameteriv := GLGetProcAddress('glGetMinmaxParameteriv');
   glHistogram := GLGetProcAddress('glHistogram');
   glMinmax := GLGetProcAddress('glMinmax');
   glResetHistogram := GLGetProcAddress('glResetHistogram');
   glResetMinmax := GLGetProcAddress('glResetMinmax');
   glTexImage3D := GLGetProcAddress('glTexImage3D');
   glTexSubImage3D := GLGetProcAddress('glTexSubImage3D');
   glCopyTexSubImage3D := GLGetProcAddress('glCopyTexSubImage3D');
   glActiveTexture := GLGetProcAddress('glActiveTexture');
   glClientActiveTexture := GLGetProcAddress('glClientActiveTexture');
   glMultiTexCoord1d := GLGetProcAddress('glMultiTexCoord1d');
   glMultiTexCoord1dV := GLGetProcAddress('glMultiTexCoord1dV');
   glMultiTexCoord1f := GLGetProcAddress('glMultiTexCoord1f');
   glMultiTexCoord1fV := GLGetProcAddress('glMultiTexCoord1fV');
   glMultiTexCoord1i := GLGetProcAddress('glMultiTexCoord1i');
   glMultiTexCoord1iV := GLGetProcAddress('glMultiTexCoord1iV');
   glMultiTexCoord1s := GLGetProcAddress('glMultiTexCoord1s');
   glMultiTexCoord1sV := GLGetProcAddress('glMultiTexCoord1sV'); 
   glMultiTexCoord2d := GLGetProcAddress('glMultiTexCoord2d');
   glMultiTexCoord2dv := GLGetProcAddress('glMultiTexCoord2dv');
   glMultiTexCoord2f := GLGetProcAddress('glMultiTexCoord2f');
   glMultiTexCoord2fv := GLGetProcAddress('glMultiTexCoord2fv');
   glMultiTexCoord2i := GLGetProcAddress('glMultiTexCoord2i');
   glMultiTexCoord2iv := GLGetProcAddress('glMultiTexCoord2iv');
   glMultiTexCoord2s := GLGetProcAddress('glMultiTexCoord2s'); 
   glMultiTexCoord2sv := GLGetProcAddress('glMultiTexCoord2sv');
   glMultiTexCoord3d := GLGetProcAddress('glMultiTexCoord3d');
   glMultiTexCoord3dv := GLGetProcAddress('glMultiTexCoord3dv'); 
   glMultiTexCoord3f := GLGetProcAddress('glMultiTexCoord3f');
   glMultiTexCoord3fv := GLGetProcAddress('glMultiTexCoord3fv');
   glMultiTexCoord3i := GLGetProcAddress('glMultiTexCoord3i');
   glMultiTexCoord3iv := GLGetProcAddress('glMultiTexCoord3iv'); 
   glMultiTexCoord3s := GLGetProcAddress('glMultiTexCoord3s'); 
   glMultiTexCoord3sv := GLGetProcAddress('glMultiTexCoord3sv');
   glMultiTexCoord4d := GLGetProcAddress('glMultiTexCoord4d');
   glMultiTexCoord4dv := GLGetProcAddress('glMultiTexCoord4dv');
   glMultiTexCoord4f := GLGetProcAddress('glMultiTexCoord4f');
   glMultiTexCoord4fv := GLGetProcAddress('glMultiTexCoord4fv');
   glMultiTexCoord4i := GLGetProcAddress('glMultiTexCoord4i');
   glMultiTexCoord4iv := GLGetProcAddress('glMultiTexCoord4iv');
   glMultiTexCoord4s := GLGetProcAddress('glMultiTexCoord4s');
   glMultiTexCoord4sv := GLGetProcAddress('glMultiTexCoord4sv');
   glLoadTransposeMatrixf := GLGetProcAddress('glLoadTransposeMatrixf');
   glLoadTransposeMatrixd := GLGetProcAddress('glLoadTransposeMatrixd');
   glMultTransposeMatrixf := GLGetProcAddress('glMultTransposeMatrixf');
   glMultTransposeMatrixd := GLGetProcAddress('glMultTransposeMatrixd');
   glSampleCoverage := GLGetProcAddress('glSampleCoverage');
   glCompressedTexImage3D := GLGetProcAddress('glCompressedTexImage3D');
   glCompressedTexImage2D := GLGetProcAddress('glCompressedTexImage2D');
   glCompressedTexImage1D := GLGetProcAddress('glCompressedTexImage1D');
   glCompressedTexSubImage3D := GLGetProcAddress('glCompressedTexSubImage3D');
   glCompressedTexSubImage2D := GLGetProcAddress('glCompressedTexSubImage2D');
   glCompressedTexSubImage1D := GLGetProcAddress('glCompressedTexSubImage1D');
   glGetCompressedTexImage := GLGetProcAddress('glGetCompressedTexImage');
   glBlendFuncSeparate := GLGetProcAddress('glBlendFuncSeparate');
   glFogCoordf := GLGetProcAddress('glFogCoordf');
   glFogCoordfv := GLGetProcAddress('glFogCoordfv');
   glFogCoordd := GLGetProcAddress('glFogCoordd');
   glFogCoorddv := GLGetProcAddress('glFogCoorddv');
   glFogCoordPointer := GLGetProcAddress('glFogCoordPointer');
   glMultiDrawArrays := GLGetProcAddress('glMultiDrawArrays');
   glMultiDrawElements := GLGetProcAddress('glMultiDrawElements');
   glPointParameterf := GLGetProcAddress('glPointParameterf');
   glPointParameterfv := GLGetProcAddress('glPointParameterfv');
   glPointParameteri := GLGetProcAddress('glPointParameteri');
   glPointParameteriv := GLGetProcAddress('glPointParameteriv');
   glSecondaryColor3b := GLGetProcAddress('glSecondaryColor3b');
   glSecondaryColor3bv := GLGetProcAddress('glSecondaryColor3bv');
   glSecondaryColor3d := GLGetProcAddress('glSecondaryColor3d');
   glSecondaryColor3dv := GLGetProcAddress('glSecondaryColor3dv');
   glSecondaryColor3f := GLGetProcAddress('glSecondaryColor3f');
   glSecondaryColor3fv := GLGetProcAddress('glSecondaryColor3fv');
   glSecondaryColor3i := GLGetProcAddress('glSecondaryColor3i');
   glSecondaryColor3iv := GLGetProcAddress('glSecondaryColor3iv');
   glSecondaryColor3s := GLGetProcAddress('glSecondaryColor3s');
   glSecondaryColor3sv := GLGetProcAddress('glSecondaryColor3sv');
   glSecondaryColor3ub := GLGetProcAddress('glSecondaryColor3ub');
   glSecondaryColor3ubv := GLGetProcAddress('glSecondaryColor3ubv');
   glSecondaryColor3ui := GLGetProcAddress('glSecondaryColor3ui');
   glSecondaryColor3uiv := GLGetProcAddress('glSecondaryColor3uiv');
   glSecondaryColor3us := GLGetProcAddress('glSecondaryColor3us');
   glSecondaryColor3usv := GLGetProcAddress('glSecondaryColor3usv');
   glSecondaryColorPointer := GLGetProcAddress('glSecondaryColorPointer');
   glWindowPos2d := GLGetProcAddress('glWindowPos2d');
   glWindowPos2dv := GLGetProcAddress('glWindowPos2dv');
   glWindowPos2f := GLGetProcAddress('glWindowPos2f');
   glWindowPos2fv := GLGetProcAddress('glWindowPos2fv');
   glWindowPos2i := GLGetProcAddress('glWindowPos2i');
   glWindowPos2iv := GLGetProcAddress('glWindowPos2iv');
   glWindowPos2s := GLGetProcAddress('glWindowPos2s');
   glWindowPos2sv := GLGetProcAddress('glWindowPos2sv');
   glWindowPos3d := GLGetProcAddress('glWindowPos3d');
   glWindowPos3dv := GLGetProcAddress('glWindowPos3dv');
   glWindowPos3f := GLGetProcAddress('glWindowPos3f');
   glWindowPos3fv := GLGetProcAddress('glWindowPos3fv');
   glWindowPos3i := GLGetProcAddress('glWindowPos3i');
   glWindowPos3iv := GLGetProcAddress('glWindowPos3iv');
   glWindowPos3s := GLGetProcAddress('glWindowPos3s');
   glWindowPos3sv := GLGetProcAddress('glWindowPos3sv');
   glGenQueries := GLGetProcAddress('glGenQueries');
   glDeleteQueries := GLGetProcAddress('glDeleteQueries');
   glIsQuery := GLGetProcAddress('glIsQuery');
   glBeginQuery := GLGetProcAddress('glBeginQuery');
   glEndQuery := GLGetProcAddress('glEndQuery');
   glGetQueryiv := GLGetProcAddress('glGetQueryiv');
   glGetQueryObjectiv := GLGetProcAddress('glGetQueryObjectiv');
   glGetQueryObjectuiv := GLGetProcAddress('glGetQueryObjectuiv');
   glBindBuffer := GLGetProcAddress('glBindBuffer');
   glDeleteBuffers := GLGetProcAddress('glDeleteBuffers');
   glGenBuffers := GLGetProcAddress('glGenBuffers');
   glIsBuffer := GLGetProcAddress('glIsBuffer');
   glBufferData := GLGetProcAddress('glBufferData');
   glBufferSubData := GLGetProcAddress('glBufferSubData');
   glGetBufferSubData := GLGetProcAddress('glGetBufferSubData');
   glMapBuffer := GLGetProcAddress('glMapBuffer');
   glUnmapBuffer := GLGetProcAddress('glUnmapBuffer');
   glGetBufferParameteriv := GLGetProcAddress('glGetBufferParameteriv');
   glGetBufferPointerv := GLGetProcAddress('glGetBufferPointerv');
   glBlendEquationSeparate := GLGetProcAddress('glBlendEquationSeparate');
   glDrawBuffers := GLGetProcAddress('glDrawBuffers');
   glStencilOpSeparate := GLGetProcAddress('glStencilOpSeparate');
   glStencilFuncSeparate := GLGetProcAddress('glStencilFuncSeparate');
   glStencilMaskSeparate := GLGetProcAddress('glStencilMaskSeparate');
   glAttachShader := GLGetProcAddress('glAttachShader');
   glBindAttribLocation := GLGetProcAddress('glBindAttribLocation');
   glCompileShader := GLGetProcAddress('glCompileShader');
   glCreateProgram := GLGetProcAddress('glCreateProgram');
   glCreateShader := GLGetProcAddress('glCreateShader');
   glDeleteProgram := GLGetProcAddress('glDeleteProgram');
   glDeleteShader := GLGetProcAddress('glDeleteShader');
   glDetachShader := GLGetProcAddress('glDetachShader');
   glDisableVertexAttribArray := GLGetProcAddress('glDisableVertexAttribArray');
   glEnableVertexAttribArray := GLGetProcAddress('glEnableVertexAttribArray');
   glGetActiveAttrib := GLGetProcAddress('glGetActiveAttrib');
   glGetActiveUniform := GLGetProcAddress('glGetActiveUniform');
   glGetAttachedShaders := GLGetProcAddress('glGetAttachedShaders');
   glGetAttribLocation := GLGetProcAddress('glGetAttribLocation');
   glGetProgramiv := GLGetProcAddress('glGetProgramiv');
   glGetProgramInfoLog := GLGetProcAddress('glGetProgramInfoLog');
   glGetShaderiv := GLGetProcAddress('glGetShaderiv');
   glGetShaderInfoLog := GLGetProcAddress('glGetShaderInfoLog');
   glGetShaderSource := GLGetProcAddress('glGetShaderSource');
   glGetUniformLocation := GLGetProcAddress('glGetUniformLocation');
   glGetUniformfv := GLGetProcAddress('glGetUniformfv');
   glGetUniformiv := GLGetProcAddress('glGetUniformiv');
   glGetVertexAttribdv := GLGetProcAddress('glGetVertexAttribdv');
   glGetVertexAttribfv := GLGetProcAddress('glGetVertexAttribfv');
   glGetVertexAttribiv := GLGetProcAddress('glGetVertexAttribiv');
   glGetVertexAttribPointerv := GLGetProcAddress('glGetVertexAttribPointerv');
   glIsProgram := GLGetProcAddress('glIsProgram');
   glIsShader := GLGetProcAddress('glIsShader');
   glLinkProgram := GLGetProcAddress('glLinkProgram');
   glShaderSource := GLGetProcAddress('glShaderSource');
   glUseProgram := GLGetProcAddress('glUseProgram');
   glUniform1f := GLGetProcAddress('glUniform1f');
   glUniform2f := GLGetProcAddress('glUniform2f');
   glUniform3f := GLGetProcAddress('glUniform3f');
   glUniform4f := GLGetProcAddress('glUniform4f');
   glUniform1i := GLGetProcAddress('glUniform1i');
   glUniform2i := GLGetProcAddress('glUniform2i');
   glUniform3i := GLGetProcAddress('glUniform3i');
   glUniform4i := GLGetProcAddress('glUniform4i');
   glUniform1fv := GLGetProcAddress('glUniform1fv');
   glUniform2fv := GLGetProcAddress('glUniform2fv');
   glUniform3fv := GLGetProcAddress('glUniform3fv');
   glUniform4fv := GLGetProcAddress('glUniform4fv');
   glUniform1iv := GLGetProcAddress('glUniform1iv');
   glUniform2iv := GLGetProcAddress('glUniform2iv');
   glUniform3iv := GLGetProcAddress('glUniform3iv');
   glUniform4iv := GLGetProcAddress('glUniform4iv');
   glUniformMatrix2fv := GLGetProcAddress('glUniformMatrix2fv');
   glUniformMatrix3fv := GLGetProcAddress('glUniformMatrix3fv');
   glUniformMatrix4fv := GLGetProcAddress('glUniformMatrix4fv');
   glValidateProgram := GLGetProcAddress('glValidateProgram');
   glVertexAttrib1d := GLGetProcAddress('glVertexAttrib1d');
   glVertexAttrib1dv := GLGetProcAddress('glVertexAttrib1dv');
   glVertexAttrib1f := GLGetProcAddress('glVertexAttrib1f');
   glVertexAttrib1fv := GLGetProcAddress('glVertexAttrib1fv');
   glVertexAttrib1s := GLGetProcAddress('glVertexAttrib1s');
   glVertexAttrib1sv := GLGetProcAddress('glVertexAttrib1sv');
   glVertexAttrib2d := GLGetProcAddress('glVertexAttrib2d');
   glVertexAttrib2dv := GLGetProcAddress('glVertexAttrib2dv');
   glVertexAttrib2f := GLGetProcAddress('glVertexAttrib2f');
   glVertexAttrib2fv := GLGetProcAddress('glVertexAttrib2fv');
   glVertexAttrib2s := GLGetProcAddress('glVertexAttrib2s');
   glVertexAttrib2sv := GLGetProcAddress('glVertexAttrib2sv');
   glVertexAttrib3d := GLGetProcAddress('glVertexAttrib3d');
   glVertexAttrib3dv := GLGetProcAddress('glVertexAttrib3dv');
   glVertexAttrib3f := GLGetProcAddress('glVertexAttrib3f');
   glVertexAttrib3fv := GLGetProcAddress('glVertexAttrib3fv');
   glVertexAttrib3s := GLGetProcAddress('glVertexAttrib3s');
   glVertexAttrib3sv := GLGetProcAddress('glVertexAttrib3sv');
   glVertexAttrib4Nbv := GLGetProcAddress('glVertexAttrib4Nbv');
   glVertexAttrib4Niv := GLGetProcAddress('glVertexAttrib4Niv');
   glVertexAttrib4Nsv := GLGetProcAddress('glVertexAttrib4Nsv');
   glVertexAttrib4Nub := GLGetProcAddress('glVertexAttrib4Nub');
   glVertexAttrib4Nubv := GLGetProcAddress('glVertexAttrib4Nubv');
   glVertexAttrib4Nuiv := GLGetProcAddress('glVertexAttrib4Nuiv');
   glVertexAttrib4Nusv := GLGetProcAddress('glVertexAttrib4Nusv');
   glVertexAttrib4bv := GLGetProcAddress('glVertexAttrib4bv');
   glVertexAttrib4d := GLGetProcAddress('glVertexAttrib4d');
   glVertexAttrib4dv := GLGetProcAddress('glVertexAttrib4dv');
   glVertexAttrib4f := GLGetProcAddress('glVertexAttrib4f');
   glVertexAttrib4fv := GLGetProcAddress('glVertexAttrib4fv');
   glVertexAttrib4iv := GLGetProcAddress('glVertexAttrib4iv');
   glVertexAttrib4s := GLGetProcAddress('glVertexAttrib4s');
   glVertexAttrib4sv := GLGetProcAddress('glVertexAttrib4sv');
   glVertexAttrib4ubv := GLGetProcAddress('glVertexAttrib4ubv');
   glVertexAttrib4uiv := GLGetProcAddress('glVertexAttrib4uiv');
   glVertexAttrib4usv := GLGetProcAddress('glVertexAttrib4usv');
   glVertexAttribPointer := GLGetProcAddress('glVertexAttribPointer');
   glUniformMatrix2x3fv := GLGetProcAddress('glUniformMatrix2x3fv');
   glUniformMatrix3x2fv := GLGetProcAddress('glUniformMatrix3x2fv');
   glUniformMatrix2x4fv := GLGetProcAddress('glUniformMatrix2x4fv');
   glUniformMatrix4x2fv := GLGetProcAddress('glUniformMatrix4x2fv');
   glUniformMatrix3x4fv := GLGetProcAddress('glUniformMatrix3x4fv');
   glUniformMatrix4x3fv := GLGetProcAddress('glUniformMatrix4x3fv');
   glVertexAttribI1i := GLGetProcAddress('glVertexAttribI1i');
   glVertexAttribI2i := GLGetProcAddress('glVertexAttribI2i');
   glVertexAttribI3i := GLGetProcAddress('glVertexAttribI3i');
   glVertexAttribI4i := GLGetProcAddress('glVertexAttribI4i');
   glVertexAttribI1ui := GLGetProcAddress('glVertexAttribI1ui');
   glVertexAttribI2ui := GLGetProcAddress('glVertexAttribI2ui');
   glVertexAttribI3ui := GLGetProcAddress('glVertexAttribI3ui');
   glVertexAttribI4ui := GLGetProcAddress('glVertexAttribI4ui');
   glVertexAttribI1iv := GLGetProcAddress('glVertexAttribI1iv');
   glVertexAttribI2iv := GLGetProcAddress('glVertexAttribI2iv');
   glVertexAttribI3iv := GLGetProcAddress('glVertexAttribI3iv');
   glVertexAttribI4iv := GLGetProcAddress('glVertexAttribI4iv');
   glVertexAttribI1uiv := GLGetProcAddress('glVertexAttribI1uiv');
   glVertexAttribI2uiv := GLGetProcAddress('glVertexAttribI2uiv');
   glVertexAttribI3uiv := GLGetProcAddress('glVertexAttribI3uiv');
   glVertexAttribI4uiv := GLGetProcAddress('glVertexAttribI4uiv');
   glVertexAttribI4bv := GLGetProcAddress('glVertexAttribI4bv');
   glVertexAttribI4sv := GLGetProcAddress('glVertexAttribI4sv');
   glVertexAttribI4ubv := GLGetProcAddress('glVertexAttribI4ubv');
   glVertexAttribI4usv := GLGetProcAddress('glVertexAttribI4usv');
   glVertexAttribIPointer := GLGetProcAddress('glVertexAttribIPointer');
   glGetVertexAttribIiv := GLGetProcAddress('glGetVertexAttribIiv');
   glGetVertexAttribIuiv := GLGetProcAddress('glGetVertexAttribIuiv');
   glUniform1ui := GLGetProcAddress('glUniform1ui');
   glUniform2ui :=  GLGetProcAddress('glUniform2ui');
   glUniform3ui := GLGetProcAddress('glUniform3ui');
   glUniform4ui := GLGetProcAddress('glUniform4ui');
   glUniform1uiv := GLGetProcAddress('glUniform1uiv');
   glUniform2uiv := GLGetProcAddress('glUniform2uiv');
   glUniform3uiv := GLGetProcAddress('glUniform3uiv');
   glUniform4uiv := GLGetProcAddress('glUniform4uiv');
   glGetUniformuiv := GLGetProcAddress('glGetUniformuiv');
   glBindFragDataLocation := GLGetProcAddress('glBindFragDataLocation');
   glGetFragDataLocation := GLGetProcAddress('glGetFragDataLocation');
   glBeginConditionalRender := GLGetProcAddress('glBeginConditionalRender');
   glEndConditionalRender := GLGetProcAddress('glEndConditionalRender');
   glClampColor := GLGetProcAddress('glClampColor');
   //glClearColorIi := GLGetProcAddress('glClearColorIi');
   //glClearColorIui := GLGetProcAddress('glClearColorIui');
   glTexParameterIiv := GLGetProcAddress('glTexParameterIiv');
   glTexParameterIuiv := GLGetProcAddress('glTexParameterIuiv');
   glGetTexParameterIiv := GLGetProcAddress('glGetTexParameterIiv');
   glGetTexParameterIuiv := GLGetProcAddress('glGetTexParameterIuiv');
   glColorMaski := GLGetProcAddress('glColorMaski');
   glGetBooleani_v := GLGetProcAddress('glGetBooleani_v');
   glGetIntegeri_v := GLGetProcAddress('glGetIntegeri_v');
   glEnablei := GLGetProcAddress('glEnablei');
   glDisablei := GLGetProcAddress('glDisablei');
   glIsEnabledi := GLGetProcAddress('glIsEnabledi');
   glBindBufferRange := GLGetProcAddress('glBindBufferRange');
   glBindBufferBase := GLGetProcAddress('glBindBufferBase');
   glBeginTransformFeedback := GLGetProcAddress('glBeginTransformFeedback');
   glEndTransformFeedback := GLGetProcAddress('glEndTransformFeedback');
   glTransformFeedbackVaryings := GLGetProcAddress('glTransformFeedbackVaryings');
   glGetTransformFeedbackVarying := GLGetProcAddress('glGetTransformFeedbackVarying');
   glClearBufferiv := GLGetProcAddress('glClearBufferiv');
   glClearBufferuiv := GLGetProcAddress('glClearBufferuiv');
   glClearBufferfv := GLGetProcAddress('glClearBufferfv');
   glClearBufferfi := GLGetProcAddress('glClearBufferfi');
   glGetStringi := GLGetProcAddress('glGetStringi');
   glDrawArraysInstanced := GLGetProcAddress('glDrawArraysInstanced');
   glDrawElementsInstanced := GLGetProcAddress('glDrawElementsInstanced');
   glTexBuffer := GLGetProcAddress('glTexBuffer');
   glPrimitiveRestartIndex := GLGetProcAddress('glPrimitiveRestartIndex');
   glGetInteger64i_v := GLGetProcAddress('glGetInteger64i_v');
   glGetBufferParameteri64v := GLGetProcAddress('glGetBufferParameteri64v');
   glProgramParameteri := GLGetProcAddress('glProgramParameteri');
   glFramebufferTexture := GLGetProcAddress('glFramebufferTexture');
   glVertexAttribDivisorARB := GLGetProcAddress('glVertexAttribDivisor');
   glBlendEquationi := GLGetProcAddress('glBlendEquationi');
   glBlendEquationSeparatei := GLGetProcAddress('glBlendEquationSeparatei');
   glBlendFunci := GLGetProcAddress('glBlendFunci');
   glBlendFuncSeparatei := GLGetProcAddress('glBlendFuncSeparatei');
   glMinSampleShading := GLGetProcAddress('glMinSampleShading');
   gluNurbsCallbackDataEXT := GLGetProcAddress('gluNurbsCallbackDataEXT');
   gluNewNurbsTessellatorEXT := GLGetProcAddress('gluNewNurbsTessellatorEXT');
   gluDeleteNurbsTessellatorEXT := GLGetProcAddress('gluDeleteNurbsTessellatorEXT');
   glActiveTextureARB := GLGetProcAddress('glActiveTextureARB');
   glClientActiveTextureARB := GLGetProcAddress('glClientActiveTextureARB');
   glMultiTexCoord1dARB := GLGetProcAddress('glMultiTexCoord1dARB');
   glMultiTexCoord1dVARB := GLGetProcAddress('glMultiTexCoord1dVARB');
   glMultiTexCoord1fARB := GLGetProcAddress('glMultiTexCoord1fARB');
   glMultiTexCoord1fVARB := GLGetProcAddress('glMultiTexCoord1fVARB');
   glMultiTexCoord1iARB := GLGetProcAddress('glMultiTexCoord1iARB');
   glMultiTexCoord1iVARB := GLGetProcAddress('glMultiTexCoord1iVARB');
   glMultiTexCoord1sARB := GLGetProcAddress('glMultiTexCoord1sARB');
   glMultiTexCoord1sVARB := GLGetProcAddress('glMultiTexCoord1sVARB');
   glMultiTexCoord2dARB := GLGetProcAddress('glMultiTexCoord2dARB');
   glMultiTexCoord2dvARB := GLGetProcAddress('glMultiTexCoord2dvARB');
   glMultiTexCoord2fARB := GLGetProcAddress('glMultiTexCoord2fARB');
   glMultiTexCoord2fvARB := GLGetProcAddress('glMultiTexCoord2fvARB');
   glMultiTexCoord2iARB := GLGetProcAddress('glMultiTexCoord2iARB');
   glMultiTexCoord2ivARB := GLGetProcAddress('glMultiTexCoord2ivARB');
   glMultiTexCoord2sARB := GLGetProcAddress('glMultiTexCoord2sARB');
   glMultiTexCoord2svARB := GLGetProcAddress('glMultiTexCoord2svARB');
   glMultiTexCoord3dARB := GLGetProcAddress('glMultiTexCoord3dARB');
   glMultiTexCoord3dvARB := GLGetProcAddress('glMultiTexCoord3dvARB');
   glMultiTexCoord3fARB := GLGetProcAddress('glMultiTexCoord3fARB');
   glMultiTexCoord3fvARB := GLGetProcAddress('glMultiTexCoord3fvARB');
   glMultiTexCoord3iARB := GLGetProcAddress('glMultiTexCoord3iARB');
   glMultiTexCoord3ivARB := GLGetProcAddress('glMultiTexCoord3ivARB');
   glMultiTexCoord3sARB := GLGetProcAddress('glMultiTexCoord3sARB');
   glMultiTexCoord3svARB := GLGetProcAddress('glMultiTexCoord3svARB');
   glMultiTexCoord4dARB := GLGetProcAddress('glMultiTexCoord4dARB');
   glMultiTexCoord4dvARB := GLGetProcAddress('glMultiTexCoord4dvARB');
   glMultiTexCoord4fARB := GLGetProcAddress('glMultiTexCoord4fARB');
   glMultiTexCoord4fvARB := GLGetProcAddress('glMultiTexCoord4fvARB');
   glMultiTexCoord4iARB := GLGetProcAddress('glMultiTexCoord4iARB');
   glMultiTexCoord4ivARB := GLGetProcAddress('glMultiTexCoord4ivARB');
   glMultiTexCoord4sARB := GLGetProcAddress('glMultiTexCoord4sARB');
   glMultiTexCoord4svARB := GLGetProcAddress('glMultiTexCoord4svARB');
   glLoadTransposeMatrixfARB := GLGetProcAddress('glLoadTransposeMatrixfARB');
   glLoadTransposeMatrixdARB := GLGetProcAddress('glLoadTransposeMatrixdARB');
   glMultTransposeMatrixfARB := GLGetProcAddress('glMultTransposeMatrixfARB');
   glMultTransposeMatrixdARB := GLGetProcAddress('glMultTransposeMatrixdARB');
   glSampleCoverageARB := GLGetProcAddress('glSampleCoverageARB');
   glCompressedTexImage3DARB := GLGetProcAddress('glCompressedTexImage3DARB');
   glCompressedTexImage2DARB := GLGetProcAddress('glCompressedTexImage2DARB');
   glCompressedTexImage1DARB := GLGetProcAddress('glCompressedTexImage1DARB');
   glCompressedTexSubImage3DARB := GLGetProcAddress('glCompressedTexSubImage3DARB');
   glCompressedTexSubImage2DARB := GLGetProcAddress('glCompressedTexSubImage2DARB');
   glCompressedTexSubImage1DARB := GLGetProcAddress('glCompressedTexSubImage1DARB');
   glGetCompressedTexImageARB := GLGetProcAddress('glGetCompressedTexImageARB');
   glPointParameterfARB := GLGetProcAddress('glPointParameterfARB');
   glPointParameterfvARB := GLGetProcAddress('glPointParameterfvARB');
   glWeightbvARB := GLGetProcAddress('glWeightbvARB');
   glWeightsvARB := GLGetProcAddress('glWeightsvARB');
   glWeightivARB := GLGetProcAddress('glWeightivARB');
   glWeightfvARB := GLGetProcAddress('glWeightfvARB');
   glWeightdvARB := GLGetProcAddress('glWeightdvARB');
   glWeightubvARB := GLGetProcAddress('glWeightubvARB');
   glWeightusvARB := GLGetProcAddress('glWeightusvARB');
   glWeightuivARB := GLGetProcAddress('glWeightuivARB');
   glWeightPointerARB := GLGetProcAddress('glWeightPointerARB');
   glVertexBlendARB := GLGetProcAddress('glVertexBlendARB');
   glCurrentPaletteMatrixARB := GLGetProcAddress('glCurrentPaletteMatrixARB');
   glMatrixIndexubvARB := GLGetProcAddress('glMatrixIndexubvARB');
   glMatrixIndexusvARB := GLGetProcAddress('glMatrixIndexusvARB');
   glMatrixIndexuivARB := GLGetProcAddress('glMatrixIndexuivARB');
   glMatrixIndexPointerARB := GLGetProcAddress('glMatrixIndexPointerARB');
   glWindowPos2dARB := GLGetProcAddress('glWindowPos2dARB');
   glWindowPos2dvARB := GLGetProcAddress('glWindowPos2dvARB');
   glWindowPos2fARB := GLGetProcAddress('glWindowPos2fARB');
   glWindowPos2fvARB := GLGetProcAddress('glWindowPos2fvARB');
   glWindowPos2iARB := GLGetProcAddress('glWindowPos2iARB');
   glWindowPos2ivARB := GLGetProcAddress('glWindowPos2ivARB');
   glWindowPos2sARB := GLGetProcAddress('glWindowPos2sARB');
   glWindowPos2svARB := GLGetProcAddress('glWindowPos2svARB');
   glWindowPos3dARB := GLGetProcAddress('glWindowPos3dARB');
   glWindowPos3dvARB := GLGetProcAddress('glWindowPos3dvARB');
   glWindowPos3fARB := GLGetProcAddress('glWindowPos3fARB');
   glWindowPos3fvARB := GLGetProcAddress('glWindowPos3fvARB');
   glWindowPos3iARB := GLGetProcAddress('glWindowPos3iARB');
   glWindowPos3ivARB := GLGetProcAddress('glWindowPos3ivARB');
   glWindowPos3sARB := GLGetProcAddress('glWindowPos3sARB');
   glWindowPos3svARB := GLGetProcAddress('glWindowPos3svARB');
   glVertexAttrib1dARB := GLGetProcAddress('glVertexAttrib1dARB');
   glVertexAttrib1dvARB := GLGetProcAddress('glVertexAttrib1dvARB');
   glVertexAttrib1fARB := GLGetProcAddress('glVertexAttrib1fARB');
   glVertexAttrib1fvARB := GLGetProcAddress('glVertexAttrib1fvARB');
   glVertexAttrib1sARB := GLGetProcAddress('glVertexAttrib1sARB');
   glVertexAttrib1svARB := GLGetProcAddress('glVertexAttrib1svARB');
   glVertexAttrib2dARB := GLGetProcAddress('glVertexAttrib2dARB');
   glVertexAttrib2dvARB := GLGetProcAddress('glVertexAttrib2dvARB');
   glVertexAttrib2fARB := GLGetProcAddress('glVertexAttrib2fARB');
   glVertexAttrib2fvARB := GLGetProcAddress('glVertexAttrib2fvARB');
   glVertexAttrib2sARB := GLGetProcAddress('glVertexAttrib2sARB');
   glVertexAttrib2svARB := GLGetProcAddress('glVertexAttrib2svARB');
   glVertexAttrib3dARB := GLGetProcAddress('glVertexAttrib3dARB');
   glVertexAttrib3dvARB := GLGetProcAddress('glVertexAttrib3dvARB');
   glVertexAttrib3fARB := GLGetProcAddress('glVertexAttrib3fARB');
   glVertexAttrib3fvARB := GLGetProcAddress('glVertexAttrib3fvARB');
   glVertexAttrib3sARB := GLGetProcAddress('glVertexAttrib3sARB');
   glVertexAttrib3svARB := GLGetProcAddress('glVertexAttrib3svARB');
   glVertexAttrib4NbvARB := GLGetProcAddress('glVertexAttrib4NbvARB');
   glVertexAttrib4NivARB := GLGetProcAddress('glVertexAttrib4NivARB');
   glVertexAttrib4NsvARB := GLGetProcAddress('glVertexAttrib4NsvARB');
   glVertexAttrib4NubARB := GLGetProcAddress('glVertexAttrib4NubARB');
   glVertexAttrib4NubvARB := GLGetProcAddress('glVertexAttrib4NubvARB');
   glVertexAttrib4NuivARB := GLGetProcAddress('glVertexAttrib4NuivARB');
   glVertexAttrib4NusvARB := GLGetProcAddress('glVertexAttrib4NusvARB');
   glVertexAttrib4bvARB := GLGetProcAddress('glVertexAttrib4bvARB');
   glVertexAttrib4dARB := GLGetProcAddress('glVertexAttrib4dARB');
   glVertexAttrib4dvARB := GLGetProcAddress('glVertexAttrib4dvARB');
   glVertexAttrib4fARB := GLGetProcAddress('glVertexAttrib4fARB');
   glVertexAttrib4fvARB := GLGetProcAddress('glVertexAttrib4fvARB');
   glVertexAttrib4ivARB := GLGetProcAddress('glVertexAttrib4ivARB');
   glVertexAttrib4sARB := GLGetProcAddress('glVertexAttrib4sARB');
   glVertexAttrib4svARB := GLGetProcAddress('glVertexAttrib4svARB');
   glVertexAttrib4ubvARB := GLGetProcAddress('glVertexAttrib4ubvARB');
   glVertexAttrib4uivARB := GLGetProcAddress('glVertexAttrib4uivARB');
   glVertexAttrib4usvARB := GLGetProcAddress('glVertexAttrib4usvARB');
   glVertexAttribPointerARB := GLGetProcAddress('glVertexAttribPointerARB');
   glEnableVertexAttribArrayARB := GLGetProcAddress('glEnableVertexAttribArrayARB');
   glDisableVertexAttribArrayARB := GLGetProcAddress('glDisableVertexAttribArrayARB');
   glProgramStringARB := GLGetProcAddress('glProgramStringARB');
   glBindProgramARB := GLGetProcAddress('glBindProgramARB');
   glDeleteProgramsARB := GLGetProcAddress('glDeleteProgramsARB');
   glGenProgramsARB := GLGetProcAddress('glGenProgramsARB');
   glProgramEnvParameter4dARB := GLGetProcAddress('glProgramEnvParameter4dARB');
   glProgramEnvParameter4dvARB := GLGetProcAddress('glProgramEnvParameter4dvARB');
   glProgramEnvParameter4fARB := GLGetProcAddress('glProgramEnvParameter4fARB');
   glProgramEnvParameter4fvARB := GLGetProcAddress('glProgramEnvParameter4fvARB');
   glProgramLocalParameter4dARB := GLGetProcAddress('glProgramLocalParameter4dARB');
   glProgramLocalParameter4dvARB := GLGetProcAddress('glProgramLocalParameter4dvARB');
   glProgramLocalParameter4fARB := GLGetProcAddress('glProgramLocalParameter4fARB');
   glProgramLocalParameter4fvARB := GLGetProcAddress('glProgramLocalParameter4fvARB');
   glGetProgramEnvParameterdvARB := GLGetProcAddress('glGetProgramEnvParameterdvARB');
   glGetProgramEnvParameterfvARB := GLGetProcAddress('glGetProgramEnvParameterfvARB');
   glGetProgramLocalParameterdvARB := GLGetProcAddress('glGetProgramLocalParameterdvARB');
   glGetProgramLocalParameterfvARB := GLGetProcAddress('glGetProgramLocalParameterfvARB');
   glGetProgramivARB := GLGetProcAddress('glGetProgramivARB');
   glGetProgramStringARB := GLGetProcAddress('glGetProgramStringARB');
   glGetVertexAttribdvARB := GLGetProcAddress('glGetVertexAttribdvARB');
   glGetVertexAttribfvARB := GLGetProcAddress('glGetVertexAttribfvARB');
   glGetVertexAttribivARB := GLGetProcAddress('glGetVertexAttribivARB');
   glGetVertexAttribPointervARB := GLGetProcAddress('glGetVertexAttribPointervARB');
   glIsProgramARB := GLGetProcAddress('glIsProgramARB');
   glBindBufferARB := GLGetProcAddress('glBindBufferARB');
   glDeleteBuffersARB := GLGetProcAddress('glDeleteBuffersARB');
   glGenBuffersARB := GLGetProcAddress('glGenBuffersARB');
   glIsBufferARB := GLGetProcAddress('glIsBufferARB');
   glBufferDataARB := GLGetProcAddress('glBufferDataARB');
   glBufferSubDataARB := GLGetProcAddress('glBufferSubDataARB');
   glGetBufferSubDataARB := GLGetProcAddress('glGetBufferSubDataARB');
   glMapBufferARB := GLGetProcAddress('glMapBufferARB');
   glUnmapBufferARB := GLGetProcAddress('glUnmapBufferARB');
   glGetBufferParameterivARB := GLGetProcAddress('glGetBufferParameterivARB');
   glGetBufferPointervARB := GLGetProcAddress('glGetBufferPointervARB');
   glGenQueriesARB := GLGetProcAddress('glGenQueriesARB');
   glDeleteQueriesARB := GLGetProcAddress('glDeleteQueriesARB');
   glIsQueryARB := GLGetProcAddress('glIsQueryARB');
   glBeginQueryARB := GLGetProcAddress('glBeginQueryARB');
   glEndQueryARB := GLGetProcAddress('glEndQueryARB');
   glGetQueryivARB := GLGetProcAddress('glGetQueryivARB');
   glGetQueryObjectivARB := GLGetProcAddress('glGetQueryObjectivARB');
   glGetQueryObjectuivARB := GLGetProcAddress('glGetQueryObjectuivARB');
   glDeleteObjectARB := GLGetProcAddress('glDeleteObjectARB');
   glGetHandleARB := GLGetProcAddress('glGetHandleARB');
   glDetachObjectARB := GLGetProcAddress('glDetachObjectARB');
   glCreateShaderObjectARB := GLGetProcAddress('glCreateShaderObjectARB');
   glShaderSourceARB := GLGetProcAddress('glShaderSourceARB');
   glCompileShaderARB := GLGetProcAddress('glCompileShaderARB');
   glCreateProgramObjectARB := GLGetProcAddress('glCreateProgramObjectARB');
   glAttachObjectARB := GLGetProcAddress('glAttachObjectARB');
   glLinkProgramARB := GLGetProcAddress('glLinkProgramARB');
   glUseProgramObjectARB := GLGetProcAddress('glUseProgramObjectARB');
   glValidateProgramARB := GLGetProcAddress('glValidateProgramARB');
   glUniform1fARB := GLGetProcAddress('glUniform1fARB');
   glUniform2fARB := GLGetProcAddress('glUniform2fARB');
   glUniform3fARB := GLGetProcAddress('glUniform3fARB');
   glUniform4fARB := GLGetProcAddress('glUniform4fARB');
   glUniform1iARB := GLGetProcAddress('glUniform1iARB');
   glUniform2iARB := GLGetProcAddress('glUniform2iARB');
   glUniform3iARB := GLGetProcAddress('glUniform3iARB');
   glUniform4iARB := GLGetProcAddress('glUniform4iARB');
   glUniform1fvARB := GLGetProcAddress('glUniform1fvARB');
   glUniform2fvARB := GLGetProcAddress('glUniform2fvARB');
   glUniform3fvARB := GLGetProcAddress('glUniform3fvARB');
   glUniform4fvARB := GLGetProcAddress('glUniform4fvARB');
   glUniform1ivARB := GLGetProcAddress('glUniform1ivARB');
   glUniform2ivARB := GLGetProcAddress('glUniform2ivARB');
   glUniform3ivARB := GLGetProcAddress('glUniform3ivARB');
   glUniform4ivARB := GLGetProcAddress('glUniform4ivARB');
   glUniformMatrix2fvARB := GLGetProcAddress('glUniformMatrix2fvARB');
   glUniformMatrix3fvARB := GLGetProcAddress('glUniformMatrix3fvARB');
   glUniformMatrix4fvARB := GLGetProcAddress('glUniformMatrix4fvARB');
   glGetObjectParameterfvARB := GLGetProcAddress('glGetObjectParameterfvARB');
   glGetObjectParameterivARB := GLGetProcAddress('glGetObjectParameterivARB');
   glGetInfoLogARB := GLGetProcAddress('glGetInfoLogARB');
   glGetAttachedObjectsARB := GLGetProcAddress('glGetAttachedObjectsARB');
   glGetUniformLocationARB := GLGetProcAddress('glGetUniformLocationARB');
   glGetActiveUniformARB := GLGetProcAddress('glGetActiveUniformARB');
   glGetUniformfvARB := GLGetProcAddress('glGetUniformfvARB');
   glGetUniformivARB := GLGetProcAddress('glGetUniformivARB');
   glGetShaderSourceARB := GLGetProcAddress('glGetShaderSourceARB');
   glBindAttribLocationARB := GLGetProcAddress('glBindAttribLocationARB');
   glGetActiveAttribARB := GLGetProcAddress('glGetActiveAttribARB');
   glGetAttribLocationARB := GLGetProcAddress('glGetAttribLocationARB');
   glDrawBuffersARB := GLGetProcAddress('glDrawBuffersARB');
   glClampColorARB := GLGetProcAddress('glClampColorARB');
   glDrawArraysInstancedARB := GLGetProcAddress('glDrawArraysInstancedARB');
   glDrawElementsInstancedARB := GLGetProcAddress('glDrawElementsInstancedARB');
   glIsRenderbuffer := GLGetProcAddress('glIsRenderbuffer');
   glBindRenderbuffer := GLGetProcAddress('glBindRenderbuffer');
   glDeleteRenderbuffers := GLGetProcAddress('glDeleteRenderbuffers');
   glGenRenderbuffers := GLGetProcAddress('glGenRenderbuffers');
   glRenderbufferStorage := GLGetProcAddress('glRenderbufferStorage');
   glRenderbufferStorageMultisample := GLGetProcAddress('glRenderbufferStorageMultisample');
   glGetRenderbufferParameteriv := GLGetProcAddress('glGetRenderbufferParameteriv');
   glIsFramebuffer := GLGetProcAddress('glIsFramebuffer');
   glBindFramebuffer := GLGetProcAddress('glBindFramebuffer');
   glDeleteFramebuffers := GLGetProcAddress('glDeleteFramebuffers');
   glGenFramebuffers := GLGetProcAddress('glGenFramebuffers');
   glCheckFramebufferStatus := GLGetProcAddress('glCheckFramebufferStatus');
   glFramebufferTexture1D := GLGetProcAddress('glFramebufferTexture1D');
   glFramebufferTexture2D := GLGetProcAddress('glFramebufferTexture2D');
   glFramebufferTexture3D := GLGetProcAddress('glFramebufferTexture3D');
   glFramebufferTextureLayer := GLGetProcAddress('glFramebufferTextureLayer');
   glFramebufferRenderbuffer := GLGetProcAddress('glFramebufferRenderbuffer');
   glGetFramebufferAttachmentParameteriv := GLGetProcAddress('glGetFramebufferAttachmentParameteriv');
   glBlitFramebuffer := GLGetProcAddress('glBlitFramebuffer');
   glGenerateMipmap := GLGetProcAddress('glGenerateMipmap');
   glProgramParameteriARB := GLGetProcAddress('glProgramParameteriARB');
   glFramebufferTextureARB := GLGetProcAddress('glFramebufferTextureARB');
   glFramebufferTextureLayerARB := GLGetProcAddress('glFramebufferTextureLayerARB');
   glFramebufferTextureFaceARB := GLGetProcAddress('glFramebufferTextureFaceARB');
   glVertexAttribDivisorARB := GLGetProcAddress('glVertexAttribDivisorARB');
   glMapBufferRange := GLGetProcAddress('glMapBufferRange');
   glFlushMappedBufferRange := GLGetProcAddress('glFlushMappedBufferRange');
   glTexBufferARB := GLGetProcAddress('glTexBufferARB');
   glBindVertexArray := GLGetProcAddress('glBindVertexArray');
   glDeleteVertexArrays := GLGetProcAddress('glDeleteVertexArrays');
   glGenVertexArrays := GLGetProcAddress('glGenVertexArrays');
   glIsVertexArray := GLGetProcAddress('glIsVertexArray');
   glGetUniformIndices := GLGetProcAddress('glGetUniformIndices');
   glGetActiveUniformsiv := GLGetProcAddress('glGetActiveUniformsiv');
   glGetActiveUniformName := GLGetProcAddress('glGetActiveUniformName');
   glGetUniformBlockIndex := GLGetProcAddress('glGetUniformBlockIndex');
   glGetActiveUniformBlockiv := GLGetProcAddress('glGetActiveUniformBlockiv');
   glGetActiveUniformBlockName := GLGetProcAddress('glGetActiveUniformBlockName');
   glUniformBlockBinding := GLGetProcAddress('glUniformBlockBinding');
   glCopyBufferSubData := GLGetProcAddress('glCopyBufferSubData');
   glDrawElementsBaseVertex := GLGetProcAddress('glDrawElementsBaseVertex');
   glDrawRangeElementsBaseVertex := GLGetProcAddress('glDrawRangeElementsBaseVertex');
   glDrawElementsInstancedBaseVertex := GLGetProcAddress('glDrawElementsInstancedBaseVertex');
   glMultiDrawElementsBaseVertex := GLGetProcAddress('glMultiDrawElementsBaseVertex');
   glProvokingVertex := GLGetProcAddress('glProvokingVertex');
   glFenceSync := GLGetProcAddress('glFenceSync');
   glIsSync := GLGetProcAddress('glIsSync');
   glDeleteSync := GLGetProcAddress('glDeleteSync');
   glClientWaitSync := GLGetProcAddress('glClientWaitSync');
   glWaitSync := GLGetProcAddress('glWaitSync');
   glGetInteger64v := GLGetProcAddress('glGetInteger64v');
   glGetSynciv := GLGetProcAddress('glGetSynciv');
   glTexImage2DMultisample := GLGetProcAddress('glTexImage2DMultisample');
   glTexImage3DMultisample := GLGetProcAddress('glTexImage3DMultisample');
   glGetMultisamplefv := GLGetProcAddress('glGetMultisamplefv');
   glSampleMaski := GLGetProcAddress('glSampleMaski');
   glBlendEquation := GLGetProcAddress('glBlendEquationiARB');
   glBlendEquationSeparatei := GLGetProcAddress('glBlendEquationSeparateiARB');
   glBlendFunci := GLGetProcAddress('glBlendFunciARB');
   glBlendFuncSeparatei := GLGetProcAddress('glBlendFuncSeparateiARB');
   glMinSampleShading := GLGetProcAddress('glMinSampleShadingARB');
   glBindFragDataLocationIndexed := GLGetProcAddress('glBindFragDataLocationIndexed');
   glGetFragDataIndex := GLGetProcAddress('glGetFragDataIndex');
   glGenSamplers := GLGetProcAddress('glGenSamplers');
   glDeleteSamplers := GLGetProcAddress('glDeleteSamplers');
   glIsSampler := GLGetProcAddress('glIsSampler');
   glBindSampler := GLGetProcAddress('glBindSampler');
   glSamplerParameteri := GLGetProcAddress('glSamplerParameteri');
   glSamplerParameteriv := GLGetProcAddress('glSamplerParameteriv');
   glSamplerParameterf := GLGetProcAddress('glSamplerParameterf');
   glSamplerParameterfv := GLGetProcAddress('glSamplerParameterfv');
   glSamplerParameterIiv := GLGetProcAddress('glSamplerParameterIiv');
   glSamplerParameterIuiv := GLGetProcAddress('glSamplerParameterIuiv');
   glGetSamplerParameteriv := GLGetProcAddress('glGetSamplerParameteriv');
   glGetSamplerParameterIiv := GLGetProcAddress('glGetSamplerParameterIiv');
   glGetSamplerParameterfv := GLGetProcAddress('glGetSamplerParameterfv');
   glGetSamplerParameterIfv := GLGetProcAddress('glGetSamplerParameterIfv');
   glQueryCounter := GLGetProcAddress('glQueryCounter');
   glGetQueryObjecti64v := GLGetProcAddress('glGetQueryObjecti64v');
   glGetQueryObjectui64v := GLGetProcAddress('glGetQueryObjectui64v');
   glVertexP2ui := GLGetProcAddress('glVertexP2ui');
   glVertexP2uiv := GLGetProcAddress('glVertexP2uiv');
   glVertexP3ui := GLGetProcAddress('glVertexP3ui');
   glVertexP3uiv := GLGetProcAddress('glVertexP3uiv');
   glVertexP4ui := GLGetProcAddress('glVertexP4ui');
   glVertexP4uiv := GLGetProcAddress('glVertexP4uiv');
   glTexCoordP1ui := GLGetProcAddress('glTexCoordP1ui');
   glTexCoordP1uiv := GLGetProcAddress('glTexCoordP1uiv');
   glTexCoordP2ui := GLGetProcAddress('glTexCoordP2ui');
   glTexCoordP2uiv := GLGetProcAddress('glTexCoordP2uiv');
   glTexCoordP3ui := GLGetProcAddress('glTexCoordP3ui');
   glTexCoordP3uiv := GLGetProcAddress('glTexCoordP3uiv');
   glTexCoordP4ui := GLGetProcAddress('glTexCoordP4ui');
   glTexCoordP4uiv := GLGetProcAddress('glTexCoordP4uiv');
   glMultiTexCoordP1ui := GLGetProcAddress('glMultiTexCoordP1ui');
   glMultiTexCoordP1uiv := GLGetProcAddress('glMultiTexCoordP1uiv');
   glMultiTexCoordP2ui := GLGetProcAddress('glMultiTexCoordP2ui');
   glMultiTexCoordP2uiv := GLGetProcAddress('glMultiTexCoordP2uiv');
   glMultiTexCoordP3ui := GLGetProcAddress('glMultiTexCoordP3ui');
   glMultiTexCoordP3uiv := GLGetProcAddress('glMultiTexCoordP3uiv');
   glMultiTexCoordP4ui := GLGetProcAddress('glMultiTexCoordP4ui');
   glMultiTexCoordP4uiv := GLGetProcAddress('glMultiTexCoordP4uiv');
   glNormalP3ui := GLGetProcAddress('glNormalP3ui');
   glNormalP3uiv := GLGetProcAddress('glNormalP3uiv');
   glColorP3ui := GLGetProcAddress('glColorP3ui');
   glColorP3uiv := GLGetProcAddress('glColorP3uiv');
   glColorP4ui := GLGetProcAddress('glColorP4ui');
   glColorP4uiv := GLGetProcAddress('glColorP4uiv');
   glSecondaryColorP3ui := GLGetProcAddress('glSecondaryColorP3ui');
   glSecondaryColorP3uiv := GLGetProcAddress('glSecondaryColorP3uiv');
   glVertexAttribP1ui := GLGetProcAddress('glVertexAttribP1ui');
   glVertexAttribP1uiv := GLGetProcAddress('glVertexAttribP1uiv');
   glVertexAttribP2ui := GLGetProcAddress('glVertexAttribP2ui');
   glVertexAttribP2uiv := GLGetProcAddress('glVertexAttribP2uiv');
   glVertexAttribP3ui := GLGetProcAddress('glVertexAttribP3ui');
   glVertexAttribP3uiv := GLGetProcAddress('glVertexAttribP3uiv');
   glVertexAttribP4ui := GLGetProcAddress('glVertexAttribP4ui');
   glVertexAttribP4uiv := GLGetProcAddress('glVertexAttribP4uiv');
   glDrawArraysIndirect := GLGetProcAddress('glDrawArraysIndirect');
   glDrawElementsIndirect := GLGetProcAddress('glDrawElementsIndirect');
   glUniform1d := GLGetProcAddress('glUniform1d');
   glUniform2d := GLGetProcAddress('glUniform2d');
   glUniform3d := GLGetProcAddress('glUniform3d');
   glUniform4d := GLGetProcAddress('glUniform4d');
   glUniform1dv := GLGetProcAddress('glUniform1dv');
   glUniform2dv := GLGetProcAddress('glUniform2dv');
   glUniform3dv := GLGetProcAddress('glUniform3dv');
   glUniform4dv := GLGetProcAddress('glUniform4dv');
   glUniformMatrix2dv := GLGetProcAddress('glUniformMatrix2dv');
   glUniformMatrix3dv := GLGetProcAddress('glUniformMatrix3dv');
   glUniformMatrix4dv := GLGetProcAddress('glUniformMatrix4dv');
   glUniformMatrix2x3dv := GLGetProcAddress('glUniformMatrix2x3dv');
   glUniformMatrix2x4dv := GLGetProcAddress('glUniformMatrix2x4dv');
   glUniformMatrix3x2dv := GLGetProcAddress('glUniformMatrix3x2dv');
   glUniformMatrix3x4dv := GLGetProcAddress('glUniformMatrix3x4dv');
   glUniformMatrix4x2dv := GLGetProcAddress('glUniformMatrix4x2dv');
   glUniformMatrix4x3dv := GLGetProcAddress('glUniformMatrix4x3dv');
   glGetUniformdv := GLGetProcAddress('glGetUniformdv');
   glProgramUniform1dEXT := GLGetProcAddress('glProgramUniform1dEXT');
   glProgramUniform2dEXT := GLGetProcAddress('glProgramUniform2dEXT');
   glProgramUniform3dEXT := GLGetProcAddress('glProgramUniform3dEXT');
   glProgramUniform4dEXT := GLGetProcAddress('glProgramUniform4dEXT');
   glProgramUniform1dvEXT := GLGetProcAddress('glProgramUniform1dvEXT');
   glProgramUniform2dvEXT := GLGetProcAddress('glProgramUniform2dvEXT');
   glProgramUniform3dvEXT := GLGetProcAddress('glProgramUniform3dvEXT');
   glProgramUniform4dvEXT := GLGetProcAddress('glProgramUniform4dvEXT');
   glProgramUniformMatrix2dvEXT := GLGetProcAddress('glProgramUniformMatrix2dvEXT');
   glProgramUniformMatrix3dvEXT := GLGetProcAddress('glProgramUniformMatrix3dvEXT');
   glProgramUniformMatrix4dvEXT := GLGetProcAddress('glProgramUniformMatrix4dvEXT');
   glProgramUniformMatrix2x3dvEXT := GLGetProcAddress('glProgramUniformMatrix2x3dvEXT');
   glProgramUniformMatrix2x4dvEXT := GLGetProcAddress('glProgramUniformMatrix2x4dvEXT');
   glProgramUniformMatrix3x2dvEXT := GLGetProcAddress('glProgramUniformMatrix3x2dvEXT');
   glProgramUniformMatrix3x4dvEXT := GLGetProcAddress('glProgramUniformMatrix3x4dvEXT');
   glProgramUniformMatrix4x2dvEXT := GLGetProcAddress('glProgramUniformMatrix4x2dvEXT');
   glProgramUniformMatrix4x3dvEXT := GLGetProcAddress('glProgramUniformMatrix4x3dvEXT');
   glGetSubroutineUniformLocation := GLGetProcAddress('glGetSubroutineUniformLocation');
   glGetSubroutineIndex := GLGetProcAddress('glGetSubroutineIndex');
   glGetActiveSubroutineUniformiv := GLGetProcAddress('glGetActiveSubroutineUniformiv');
   glGetActiveSubroutineUniformName := GLGetProcAddress('glGetActiveSubroutineUniformName');
   glGetActiveSubroutineName := GLGetProcAddress('glGetActiveSubroutineName');
   glUniformSubroutinesuiv := GLGetProcAddress('glUniformSubroutinesuiv');
   glGetUniformSubroutineuiv := GLGetProcAddress('glGetUniformSubroutineuiv');
   glGetProgramStageiv := GLGetProcAddress('glGetProgramStageiv');
   glPatchParameteri := GLGetProcAddress('glPatchParameteri');
   glPatchParameterfv := GLGetProcAddress('glPatchParameterfv');
   glBindTransformFeedback := GLGetProcAddress('glBindTransformFeedback');
   glDeleteTransformFeedbacks := GLGetProcAddress('glDeleteTransformFeedbacks');
   glGenTransformFeedbacks := GLGetProcAddress('glGenTransformFeedbacks');
   glIsTransformFeedback := GLGetProcAddress('glIsTransformFeedback');
   glPauseTransformFeedback := GLGetProcAddress('glPauseTransformFeedback');
   glResumeTransformFeedback := GLGetProcAddress('glResumeTransformFeedback');
   glDrawTransformFeedback := GLGetProcAddress('glDrawTransformFeedback');
   glDrawTransformFeedbackStream := GLGetProcAddress('glDrawTransformFeedbackStream');
   glBeginQueryIndexed := GLGetProcAddress('glBeginQueryIndexed');
   glEndQueryIndexed := GLGetProcAddress('glEndQueryIndexed');
   glGetQueryIndexediv := GLGetProcAddress('glGetQueryIndexediv');
   {
   glReleaseShaderCompiler := GLGetProcAddress('glReleaseShaderCompiler');
   glShaderBinary := GLGetProcAddress('glShaderBinary');
   glGetShaderPrecisionFormat := GLGetProcAddress('glGetShaderPrecisionFormat');
   glDepthRangef := GLGetProcAddress('glDepthRangef');
   glClearDepthf := GLGetProcAddress('glClearDepthf');
   glGetProgramBinary := GLGetProcAddress('glGetProgramBinary');
   glProgramBinary := GLGetProcAddress('glProgramBinary');
   glProgramParameteri := GLGetProcAddress('glProgramParameteri');
   glUseProgramStages := GLGetProcAddress('glUseProgramStages');
   glActiveShaderProgram := GLGetProcAddress('glActiveShaderProgram');
   glCreateShaderProgramv := GLGetProcAddress('glCreateShaderProgramv');
   glBindProgramPipeline := GLGetProcAddress('glBindProgramPipeline');
   glDeleteProgramPipelines := GLGetProcAddress('glDeleteProgramPipelines');
   glGenProgramPipelines := GLGetProcAddress('glGenProgramPipelines');
   glIsProgramPipeline := GLGetProcAddress('glIsProgramPipeline');
   glGetProgramPipelineiv := GLGetProcAddress('glGetProgramPipelineiv');
   glProgramUniform1i := GLGetProcAddress('glProgramUniform1i');
   glProgramUniform1iv := GLGetProcAddress('glProgramUniform1iv');
   glProgramUniform1f := GLGetProcAddress('glProgramUniform1f');
   glProgramUniform1fv := GLGetProcAddress('glProgramUniform1fv');
   glProgramUniform1d := GLGetProcAddress('glProgramUniform1d');
   glProgramUniform1dv := GLGetProcAddress('glProgramUniform1dv');
   glProgramUniform1ui := GLGetProcAddress('glProgramUniform1ui');
   glProgramUniform1uiv := GLGetProcAddress('glProgramUniform1uiv');
   glProgramUniform2i := GLGetProcAddress('glProgramUniform2i');
   glProgramUniform2iv := GLGetProcAddress('glProgramUniform2iv');
   glProgramUniform2f := GLGetProcAddress('glProgramUniform2f');
   glProgramUniform2fv := GLGetProcAddress('glProgramUniform2fv');
   glProgramUniform2d := GLGetProcAddress('glProgramUniform2d');
   glProgramUniform2dv := GLGetProcAddress('glProgramUniform2dv');
   glProgramUniform2ui := GLGetProcAddress('glProgramUniform2ui');
   glProgramUniform2uiv := GLGetProcAddress('glProgramUniform2uiv');
   glProgramUniform3i := GLGetProcAddress('glProgramUniform3i');
   glProgramUniform3iv := GLGetProcAddress('glProgramUniform3iv');
   glProgramUniform3f := GLGetProcAddress('glProgramUniform3f');
   glProgramUniform3fv := GLGetProcAddress('glProgramUniform3fv');
   glProgramUniform3d := GLGetProcAddress('glProgramUniform3d');
   glProgramUniform3dv := GLGetProcAddress('glProgramUniform3dv');
   glProgramUniform3ui := GLGetProcAddress('glProgramUniform3ui');
   glProgramUniform3uiv := GLGetProcAddress('glProgramUniform3uiv');
   glProgramUniform4i := GLGetProcAddress('glProgramUniform4i');
   glProgramUniform4iv := GLGetProcAddress('glProgramUniform4iv');
   glProgramUniform4f := GLGetProcAddress('glProgramUniform4f');
   glProgramUniform4fv := GLGetProcAddress('glProgramUniform4fv');
   glProgramUniform4d := GLGetProcAddress('glProgramUniform4d');
   glProgramUniform4dv := GLGetProcAddress('glProgramUniform4dv');
   glProgramUniform4ui := GLGetProcAddress('glProgramUniform4ui');
   glProgramUniform4uiv := GLGetProcAddress('glProgramUniform4uiv');
   glProgramUniformMatrix2fv := GLGetProcAddress('glProgramUniformMatrix2fv');
   glProgramUniformMatrix3fv := GLGetProcAddress('glProgramUniformMatrix3fv');
   glProgramUniformMatrix4fv := GLGetProcAddress('glProgramUniformMatrix4fv');
   glProgramUniformMatrix2dv := GLGetProcAddress('glProgramUniformMatrix2dv');
   glProgramUniformMatrix3dv := GLGetProcAddress('glProgramUniformMatrix3dv');
   glProgramUniformMatrix4dv := GLGetProcAddress('glProgramUniformMatrix4dv');
   glProgramUniformMatrix2x3fv := GLGetProcAddress('glProgramUniformMatrix2x3fv');
   glProgramUniformMatrix3x2fv := GLGetProcAddress('glProgramUniformMatrix3x2fv');
   glProgramUniformMatrix2x4fv := GLGetProcAddress('glProgramUniformMatrix2x4fv');
   glProgramUniformMatrix4x2fv := GLGetProcAddress('glProgramUniformMatrix4x2fv');
   glProgramUniformMatrix3x4fv := GLGetProcAddress('glProgramUniformMatrix3x4fv');
   glProgramUniformMatrix4x3fv := GLGetProcAddress('glProgramUniformMatrix4x3fv');
   glProgramUniformMatrix2x3dv := GLGetProcAddress('glProgramUniformMatrix2x3dv');
   glProgramUniformMatrix3x2dv := GLGetProcAddress('glProgramUniformMatrix3x2dv');
   glProgramUniformMatrix2x4dv := GLGetProcAddress('glProgramUniformMatrix2x4dv');
   glProgramUniformMatrix4x2dv := GLGetProcAddress('glProgramUniformMatrix4x2dv');
   glProgramUniformMatrix3x4dv := GLGetProcAddress('glProgramUniformMatrix3x4dv');
   glProgramUniformMatrix4x3dv := GLGetProcAddress('glProgramUniformMatrix4x3dv');
   glValidateProgramPipeline := GLGetProcAddress('glValidateProgramPipeline');
   glGetProgramPipelineInfoLog := GLGetProcAddress('glGetProgramPipelineInfoLog');
   glVertexAttribL1d := GLGetProcAddress('glVertexAttribL1d');
   glVertexAttribL2d := GLGetProcAddress('glVertexAttribL2d');
   glVertexAttribL3d := GLGetProcAddress('glVertexAttribL3d');
   glVertexAttribL4d := GLGetProcAddress('glVertexAttribL4d');
   glVertexAttribL1dv := GLGetProcAddress('glVertexAttribL1dv');
   glVertexAttribL2dv := GLGetProcAddress('glVertexAttribL2dv');
   glVertexAttribL3dv := GLGetProcAddress('glVertexAttribL3dv');
   glVertexAttribL4dv := GLGetProcAddress('glVertexAttribL4dv');
   glVertexAttribLPointer := GLGetProcAddress('glVertexAttribLPointer');
   glGetVertexAttribLdv := GLGetProcAddress('glGetVertexAttribLdv');
   glVertexArrayVertexAttribLOffsetEXT := GLGetProcAddress('glVertexArrayVertexAttribLOffsetEXT');
   glViewportArrayv := GLGetProcAddress('glViewportArrayv');
   glViewportIndexedf := GLGetProcAddress('glViewportIndexedf');
   glViewportIndexedfv := GLGetProcAddress('glViewportIndexedfv');
   glScissorArrayv := GLGetProcAddress('glScissorArrayv');
   glScissorIndexed := GLGetProcAddress('glScissorIndexed');
   glScissorIndexedv := GLGetProcAddress('glScissorIndexedv');
   glDepthRangeArrayv := GLGetProcAddress('glDepthRangeArrayv');
   glDepthRangeIndexed := GLGetProcAddress('glDepthRangeIndexed');
   glGetFloati_v := GLGetProcAddress('glGetFloati_v');
   glGetDoublei_v := GLGetProcAddress('glGetDoublei_v');
   glDebugMessageControlARB := GLGetProcAddress('glDebugMessageControlARB');
   glDebugMessageInsertARB := GLGetProcAddress('glDebugMessageInsertARB');
   glDebugMessageCallbackARB := GLGetProcAddress('glDebugMessageCallbackARB');
   glGetDebugMessageLogARB := GLGetProcAddress('glGetDebugMessageLogARB');
   glGetGraphicsResetStatusARB := GLGetProcAddress('glGetGraphicsResetStatusARB');
   glGetnMapdvARB := GLGetProcAddress('glGetnMapdvARB');
   glGetnMapfvARB := GLGetProcAddress('glGetnMapfvARB');
   glGetnMapivARB := GLGetProcAddress('glGetnMapivARB');
   glGetnPixelMapfvARB := GLGetProcAddress('glGetnPixelMapfvARB');
   glGetnPixelMapuivARB := GLGetProcAddress('glGetnPixelMapuivARB');
   glGetnPixelMapusvARB := GLGetProcAddress('glGetnPixelMapusvARB');
   glGetnPolygonStippleARB := GLGetProcAddress('glGetnPolygonStippleARB');
   glGetnColorTableARB := GLGetProcAddress('glGetnColorTableARB');
   glGetnConvolutionFilterARB := GLGetProcAddress('glGetnConvolutionFilterARB');
   glGetnSeparableFilterARB := GLGetProcAddress('glGetnSeparableFilterARB');
   glGetnHistogramARB := GLGetProcAddress('glGetnHistogramARB');
   glGetnMinmaxARB := GLGetProcAddress('glGetnMinmaxARB');
   glGetnTexImageARB := GLGetProcAddress('glGetnTexImageARB');
   glReadnPixelsARB := GLGetProcAddress('glReadnPixelsARB');
   glGetnCompressedTexImageARB := GLGetProcAddress('glGetnCompressedTexImageARB');
   glGetnUniformfvARB := GLGetProcAddress('glGetnUniformfvARB');
   glGetnUniformivARB := GLGetProcAddress('glGetnUniformivARB');
   glGetnUniformuivARB := GLGetProcAddress('glGetnUniformuivARB');
   glGetnUniformdvARB := GLGetProcAddress('glGetnUniformdvARB');
   }
   glSamplePassARB := GLGetProcAddress('glSamplePassARB');
   glArrayElementArrayEXT := GLGetProcAddress('glArrayElementArrayEXT');
   glAddSwapHintRectWIN := GLGetProcAddress('glAddSwapHintRectWIN');
   glBlendColorEXT := GLGetProcAddress('glBlendColorEXT');
   glPolygonOffsetEXT := GLGetProcAddress('glPolygonOffsetEXT');
   glTexImage3DEXT := GLGetProcAddress('glTexImage3DEXT');
   glTexSubImage1dEXT := GLGetProcAddress('glTexSubImage1DEXT');
   glTexSubImage2dEXT := GLGetProcAddress('glTexSubImage2DEXT');
   glTexSubImage3dEXT := GLGetProcAddress('glTexSubImage3DEXT');
   glCopyTexImage1DEXT := GLGetProcAddress('glCopyTexImage1DEXT');
   glCopyTexImage2DEXT := GLGetProcAddress('glCopyTexImage2DEXT');
   glCopyTexSubImage1DEXT := GLGetProcAddress('glCopyTexSubImage1DEXT');
   glCopyTexSubImage2DEXT := GLGetProcAddress('glCopyTexSubImage2DEXT');
   glCopyTexSubImage3DEXT := GLGetProcAddress('glCopyTexSubImage3DEXT');
   glGenTexturesEXT := GLGetProcAddress('glGenTexturesEXT');
   glDeleteTexturesEXT := GLGetProcAddress('glDeleteTexturesEXT');
   glBindTextureEXT := GLGetProcAddress('glBindTextureEXT');
   glPrioritizeTexturesEXT := GLGetProcAddress('glPrioritizeTexturesEXT');
   glAreTexturesResidentEXT := GLGetProcAddress('glAreTexturesResidentEXT');
   glIsTextureEXT := GLGetProcAddress('glIsTextureEXT');
   glSampleMaskSGIS := GLGetProcAddress('glSampleMaskSGIS');
   glSamplePatternSGIS := GLGetProcAddress('glSamplePatternSGIS');
   glBlendEquationEXT := GLGetProcAddress('glBlendEquationEXT');
   glColorTableEXT := GLGetProcAddress('glColorTableEXT');
   glColorSubTableEXT := GLGetProcAddress('glColorSubTableEXT');
   glGetColorTableEXT := GLGetProcAddress('glGetColorTableEXT');
   glGetColorTableParameterivEXT := GLGetProcAddress('glGetColorTableParameterivEXT');
   glGetColorTableParameterfvEXT := GLGetProcAddress('glGetColorTableParameterfvEXT');
   glIndexMaterialEXT := GLGetProcAddress('glIndexMaterialEXT');
   glIndexFuncEXT := GLGetProcAddress('glIndexFuncEXT');
   glLockArraysEXT := GLGetProcAddress('glLockArraysEXT');
   glUnlockArraysEXT := GLGetProcAddress('glUnlockArraysEXT');
   glDrawRangeElementsEXT := GLGetProcAddress('glDrawRangeElementsEXT');
   glSecondaryColor3bEXT := GLGetProcAddress('glSecondaryColor3bEXT');
   glSecondaryColor3bvEXT := GLGetProcAddress('glSecondaryColor3bvEXT');
   glSecondaryColor3dEXT := GLGetProcAddress('glSecondaryColor3dEXT');
   glSecondaryColor3dvEXT := GLGetProcAddress('glSecondaryColor3dvEXT');
   glSecondaryColor3fEXT := GLGetProcAddress('glSecondaryColor3fEXT');
   glSecondaryColor3fvEXT := GLGetProcAddress('glSecondaryColor3fvEXT');
   glSecondaryColor3iEXT := GLGetProcAddress('glSecondaryColor3iEXT');
   glSecondaryColor3ivEXT := GLGetProcAddress('glSecondaryColor3ivEXT');
   glSecondaryColor3sEXT := GLGetProcAddress('glSecondaryColor3sEXT');
   glSecondaryColor3svEXT := GLGetProcAddress('glSecondaryColor3svEXT');
   glSecondaryColor3ubEXT := GLGetProcAddress('glSecondaryColor3ubEXT');
   glSecondaryColor3ubvEXT := GLGetProcAddress('glSecondaryColor3ubvEXT');
   glSecondaryColor3uiEXT := GLGetProcAddress('glSecondaryColor3uiEXT');
   glSecondaryColor3uivEXT := GLGetProcAddress('glSecondaryColor3uivEXT');
   glSecondaryColor3usEXT := GLGetProcAddress('glSecondaryColor3usEXT');
   glSecondaryColor3usvEXT := GLGetProcAddress('glSecondaryColor3usvEXT');
   glSecondaryColorPointerEXT := GLGetProcAddress('glSecondaryColorPointerEXT');
   glMultiDrawArraysEXT := GLGetProcAddress('glMultiDrawArraysEXT');
   glMultiDrawElementsEXT := GLGetProcAddress('glMultiDrawElementsEXT');
   glFogCoordfEXT := GLGetProcAddress('glFogCoordfEXT'); 
   glFogCoordfvEXT := GLGetProcAddress('glFogCoordfvEXT'); 
   glFogCoorddEXT := GLGetProcAddress('glFogCoorddEXT');
   glFogCoorddvEXT := GLGetProcAddress('glFogCoorddvEXT'); 
   glFogCoordPointerEXT := GLGetProcAddress('glFogCoordPointerEXT'); 
   glBlendFuncSeparateEXT := GLGetProcAddress('glBlendFuncSeparateEXT');
   glFlushVertexArrayRangeNV := GLGetProcAddress('glFlushVertexArrayRangeNV'); 
   glVertexArrayRangeNV := GLGetProcAddress('glVertexArrayRangeNV');
   wglAllocateMemoryNV := GLGetProcAddress('wglAllocateMemoryNV'); 
   wglFreeMemoryNV := GLGetProcAddress('wglFreeMemoryNV');
   glCombinerParameterfvNV := GLGetProcAddress('glCombinerParameterfvNV'); 
   glCombinerParameterfNV := GLGetProcAddress('glCombinerParameterfNV');
   glCombinerParameterivNV := GLGetProcAddress('glCombinerParameterivNV'); 
   glCombinerParameteriNV := GLGetProcAddress('glCombinerParameteriNV'); 
   glCombinerInputNV := GLGetProcAddress('glCombinerInputNV');
   glCombinerOutputNV := GLGetProcAddress('glCombinerOutputNV'); 
   glFinalCombinerInputNV := GLGetProcAddress('glFinalCombinerInputNV');
   glGetCombinerInputParameterfvNV := GLGetProcAddress('glGetCombinerInputParameterfvNV');
   glGetCombinerInputParameterivNV := GLGetProcAddress('glGetCombinerInputParameterivNV'); 
   glGetCombinerOutputParameterfvNV := GLGetProcAddress('glGetCombinerOutputParameterfvNV');
   glGetCombinerOutputParameterivNV := GLGetProcAddress('glGetCombinerOutputParameterivNV');
   glGetFinalCombinerInputParameterfvNV := GLGetProcAddress('glGetFinalCombinerInputParameterfvNV');
   glGetFinalCombinerInputParameterivNV := GLGetProcAddress('glGetFinalCombinerInputParameterivNV');
   glResizeBuffersMESA := GLGetProcAddress('glResizeBuffersMESA');
   glTbufferMask3DFX := GLGetProcAddress('glTbufferMask3DFX');
   glSampleMaskEXT := GLGetProcAddress('glSampleMaskEXT');
   glSamplePatternEXT := GLGetProcAddress('glSamplePatternEXT');
   glTextureColorMaskSGIS := GLGetProcAddress('glTextureColorMaskSGIS');
   glGenFencesNV := GLGetProcAddress('glGenFencesNV');
   glDeleteFencesNV := GLGetProcAddress('glDeleteFencesNV');
   glSetFenceNV := GLGetProcAddress('glSetFenceNV');
   glTestFenceNV := GLGetProcAddress('glTestFenceNV');
   glFinishFenceNV := GLGetProcAddress('glFinishFenceNV');
   glIsFenceNV := GLGetProcAddress('glIsFenceNV');
   glGetFenceivNV := GLGetProcAddress('glGetFenceivNV');
   glAreProgramsResidentNV := GLGetProcAddress('glAreProgramsResidentNV');
   glBindProgramNV := GLGetProcAddress('glBindProgramNV');
   glDeleteProgramsNV := GLGetProcAddress('glDeleteProgramsNV');
   glExecuteProgramNV := GLGetProcAddress('glExecuteProgramNV');
   glGenProgramsNV := GLGetProcAddress('glGenProgramsNV');
   glGetProgramParameterdvNV := GLGetProcAddress('glGetProgramParameterdvNV');
   glGetProgramParameterfvNV := GLGetProcAddress('glGetProgramParameterfvNV');
   glGetProgramivNV := GLGetProcAddress('glGetProgramivNV');
   glGetProgramStringNV := GLGetProcAddress('glGetProgramStringNV');
   glGetTrackMatrixivNV := GLGetProcAddress('glGetTrackMatrixivNV');
   glGetVertexAttribdvNV:= GLGetProcAddress('glGetVertexAttribdvNV');
   glGetVertexAttribfvNV:= GLGetProcAddress('glGetVertexAttribfvNV');
   glGetVertexAttribivNV:= GLGetProcAddress('glGetVertexAttribivNV');
   glGetVertexAttribPointervNV := GLGetProcAddress ('glGetVertexAttribPointervNV');
   glIsProgramNV := GLGetProcAddress('glIsProgramNV');
   glLoadProgramNV := GLGetProcAddress('glLoadProgramNV');
   glProgramParameter4dNV := GLGetProcAddress('glProgramParameter4dNV');
   glProgramParameter4dvNV := GLGetProcAddress('glProgramParameter4dvNV');
   glProgramParameter4fNV := GLGetProcAddress('glProgramParameter4fNV');
   glProgramParameter4fvNV := GLGetProcAddress('glProgramParameter4fvNV');
   glProgramParameters4dvNV := GLGetProcAddress ('glProgramParameters4dvNV');
   glProgramParameters4fvNV := GLGetProcAddress ('glProgramParameters4fvNV');
   glRequestResidentProgramsNV := GLGetProcAddress ('glRequestResidentProgramsNV');
   glTrackMatrixNV := GLGetProcAddress('glTrackMatrixNV');
   glVertexAttribPointerNV := GLGetProcAddress('glVertexAttribPointerNV');
   glVertexAttrib1dNV := GLGetProcAddress('glVertexAttrib1dNV');
   glVertexAttrib1dvNV := GLGetProcAddress('glVertexAttrib1dvNV');
   glVertexAttrib1fNV := GLGetProcAddress('glVertexAttrib1fNV');
   glVertexAttrib1fvNV := GLGetProcAddress('glVertexAttrib1fvNV');
   glVertexAttrib1sNV := GLGetProcAddress('glVertexAttrib1sNV');
   glVertexAttrib1svNV := GLGetProcAddress('glVertexAttrib1svNV');
   glVertexAttrib2dNV := GLGetProcAddress('glVertexAttrib2dNV');
   glVertexAttrib2dvNV := GLGetProcAddress('glVertexAttrib2dvNV');
   glVertexAttrib2fNV := GLGetProcAddress('glVertexAttrib2fNV');
   glVertexAttrib2fvNV := GLGetProcAddress('glVertexAttrib2fvNV');
   glVertexAttrib2sNV := GLGetProcAddress('glVertexAttrib2sNV');
   glVertexAttrib2svNV := GLGetProcAddress('glVertexAttrib2svNV');
   glVertexAttrib3dNV := GLGetProcAddress('glVertexAttrib3dNV');
   glVertexAttrib3dvNV := GLGetProcAddress('glVertexAttrib3dvNV');
   glVertexAttrib3fNV := GLGetProcAddress('glVertexAttrib3fNV');
   glVertexAttrib3fvNV := GLGetProcAddress('glVertexAttrib3fvNV');
   glVertexAttrib3sNV := GLGetProcAddress('glVertexAttrib3sNV');
   glVertexAttrib3svNV := GLGetProcAddress('glVertexAttrib3svNV');
   glVertexAttrib4dNV := GLGetProcAddress('glVertexAttrib4dNV');
   glVertexAttrib4dvNV := GLGetProcAddress('glVertexAttrib4dvNV');
   glVertexAttrib4fNV := GLGetProcAddress('glVertexAttrib4fNV');
   glVertexAttrib4fvNV := GLGetProcAddress('glVertexAttrib4fvNV');
   glVertexAttrib4sNV := GLGetProcAddress('glVertexAttrib4sNV');
   glVertexAttrib4svNV := GLGetProcAddress('glVertexAttrib4svNV');
   glVertexAttrib4ubvNV := GLGetProcAddress('glVertexAttrib4ubvNV');
   glVertexAttribs1dvNV := GLGetProcAddress('glVertexAttribs1dvNV');
   glVertexAttribs1fvNV := GLGetProcAddress('glVertexAttribs1fvNV');
   glVertexAttribs1svNV := GLGetProcAddress('glVertexAttribs1svNV');
   glVertexAttribs2dvNV := GLGetProcAddress('glVertexAttribs2dvNV');
   glVertexAttribs2fvNV := GLGetProcAddress('glVertexAttribs2fvNV');
   glVertexAttribs2svNV := GLGetProcAddress('glVertexAttribs2svNV');
   glVertexAttribs3dvNV := GLGetProcAddress('glVertexAttribs3dvNV');
   glVertexAttribs3fvNV := GLGetProcAddress('glVertexAttribs3fvNV');
   glVertexAttribs3svNV := GLGetProcAddress('glVertexAttribs3svNV');
   glVertexAttribs4dvNV := GLGetProcAddress('glVertexAttribs4dvNV');
   glVertexAttribs4fvNV := GLGetProcAddress('glVertexAttribs4fvNV');
   glVertexAttribs4svNV := GLGetProcAddress('glVertexAttribs4svNV');
   glVertexAttribs4ubvNV := GLGetProcAddress('glVertexAttribs4ubvN');
   glGenOcclusionQueriesNV := GLGetProcAddress('glGenOcclusionQueriesNV');
   glDeleteOcclusionQueriesNV := GLGetProcAddress('glDeleteOcclusionQueriesNV');
   glIsOcclusionQueryNV := GLGetProcAddress('glIsOcclusionQueryNV');
   glBeginOcclusionQueryNV := GLGetProcAddress('glBeginOcclusionQueryNV');
   glEndOcclusionQueryNV := GLGetProcAddress('glEndOcclusionQueryNV');
   glGetOcclusionQueryivNV := GLGetProcAddress('glGetOcclusionQueryivNV');
   glGetOcclusionQueryuivNV := GLGetProcAddress('glGetOcclusionQueryuivNV');
   glPointParameteriNV := GLGetProcAddress('glPointParameteriNV');
   glPointParameterivNV := GLGetProcAddress('glPointParameterivNV');
   glActiveStencilFaceEXT := GLGetProcAddress('glActiveStencilFaceEXT');
   glDrawBuffersATI := GLGetProcAddress('glDrawBuffersATI');
   glPrimitiveRestartNV := GLGetProcAddress('glPrimitiveRestartNV');
   glPrimitiveRestartIndexNV := GLGetProcAddress('glPrimitiveRestartIndexNV');
   glPrimitiveRestartIndex := GLGetProcAddress('glPrimitiveRestartIndex');
   if Addr(glPrimitiveRestartIndex) = nil then
    glPrimitiveRestartIndex := glPrimitiveRestartIndexNV;
   glDepthBoundsEXT := GLGetProcAddress('glDepthBoundsEXT');
   glBlendEquationSeparateEXT := GLGetProcAddress('glBlendEquationSeparateEXT');
   glIsRenderbufferEXT := GLGetProcAddress('glIsRenderbufferEXT');
   glBindRenderbufferEXT := GLGetProcAddress('glBindRenderbufferEXT');
   glDeleteRenderbuffersEXT := GLGetProcAddress('glDeleteRenderbuffersEXT');
   glGenRenderbuffersEXT := GLGetProcAddress('glGenRenderbuffersEXT');
   glRenderbufferStorageEXT := GLGetProcAddress('glRenderbufferStorageEXT');
   glGetRenderbufferParameterivEXT := GLGetProcAddress('glGetRenderbufferParameterivEXT');
   glIsFramebufferEXT := GLGetProcAddress('glIsFramebufferEXT');
   glBindFramebufferEXT := GLGetProcAddress('glBindFramebufferEXT');
   glDeleteFramebuffersEXT := GLGetProcAddress('glDeleteFramebuffersEXT');
   glGenFramebuffersEXT := GLGetProcAddress('glGenFramebuffersEXT');
   glCheckFramebufferStatusEXT := GLGetProcAddress('glCheckFramebufferStatusEXT');
   glFramebufferTexture1DEXT := GLGetProcAddress('glFramebufferTexture1DEXT');
   glFramebufferTexture2DEXT := GLGetProcAddress('glFramebufferTexture2DEXT');
   glFramebufferTexture3DEXT := GLGetProcAddress('glFramebufferTexture3DEXT');
   glFramebufferRenderbufferEXT := GLGetProcAddress('glFramebufferRenderbufferEXT');
   glGetFramebufferAttachmentParameterivEXT := GLGetProcAddress('glGetFramebufferAttachmentParameterivEXT');
   glGenerateMipmapEXT := GLGetProcAddress('glGenerateMipmapEXT');
   glStringMarkerGREMEDY := GLGetProcAddress('glStringMarkerGREMEDY');
   glStencilClearTagEXT := GLGetProcAddress('glStencilClearTagEXT');
   glBlitFramebufferEXT := GLGetProcAddress('glBlitFramebufferEXT');
   glRenderbufferStorageMultisampleEXT := GLGetProcAddress('glRenderbufferStorageMultisampleEXT');
   glGetQueryObjecti64vEXT := GLGetProcAddress('glGetQueryObjecti64vEXT');
   glGetQueryObjectui64vEXT := GLGetProcAddress('glGetQueryObjectui64vEXT');
   glProgramEnvParameters4fvEXT := GLGetProcAddress('glProgramEnvParameters4fvEXT');
   glProgramLocalParameters4fvEXT := GLGetProcAddress('glProgramLocalParameters4fvEXT');
   glProgramVertexLimitNV := GLGetProcAddress('glProgramVertexLimitNV');
   glProgramParameteriEXT := GLGetProcAddress('glProgramParameteriEXT');
   glFramebufferTextureEXT := GLGetProcAddress('glFramebufferTextureEXT');
   glFramebufferTextureLayerEXT := GLGetProcAddress('glFramebufferTextureLayerEXT');
   glFramebufferTextureFaceEXT := GLGetProcAddress('glFramebufferTextureFaceEXT');
   glVertexAttribI1iEXT := GLGetProcAddress('glVertexAttribI1iEXT');
   glVertexAttribI2iEXT := GLGetProcAddress('glVertexAttribI2iEXT');
   glVertexAttribI3iEXT := GLGetProcAddress('glVertexAttribI3iEXT');
   glVertexAttribI4iEXT := GLGetProcAddress('glVertexAttribI4iEXT');
   glVertexAttribI1uiEXT := GLGetProcAddress('glVertexAttribI1uiEXT');
   glVertexAttribI2uiEXT := GLGetProcAddress('glVertexAttribI2uiEXT');
   glVertexAttribI3uiEXT := GLGetProcAddress('glVertexAttribI3uiEXT');
   glVertexAttribI4uiEXT := GLGetProcAddress('glVertexAttribI4uiEXT');
   glVertexAttribI1ivEXT := GLGetProcAddress('glVertexAttribI1ivEXT');
   glVertexAttribI2ivEXT := GLGetProcAddress('glVertexAttribI2ivEXT');
   glVertexAttribI3ivEXT := GLGetProcAddress('glVertexAttribI3ivEXT');
   glVertexAttribI4ivEXT := GLGetProcAddress('glVertexAttribI4ivEXT');
   glVertexAttribI1uivEXT := GLGetProcAddress('glVertexAttribI1uivEXT');
   glVertexAttribI2uivEXT := GLGetProcAddress('glVertexAttribI2uivEXT');
   glVertexAttribI3uivEXT := GLGetProcAddress('glVertexAttribI3uivEXT');
   glVertexAttribI4uivEXT := GLGetProcAddress('glVertexAttribI4uivEXT');
   glVertexAttribI4bvEXT := GLGetProcAddress('glVertexAttribI4bvEXT');
   glVertexAttribI4svEXT := GLGetProcAddress('glVertexAttribI4svEXT');
   glVertexAttribI4ubvEXT := GLGetProcAddress('glVertexAttribI4ubvEXT');
   glVertexAttribI4usvEXT := GLGetProcAddress('glVertexAttribI4usvEXT');
   glVertexAttribIPointerEXT := GLGetProcAddress('glVertexAttribIPointerEXT');
   glGetVertexAttribIivEXT := GLGetProcAddress('glGetVertexAttribIivEXT');
   glGetVertexAttribIuivEXT := GLGetProcAddress('glGetVertexAttribIuivEXT');
   glUniform1uiEXT := GLGetProcAddress('glUniform1uiEXT');
   glUniform2uiEXT := GLGetProcAddress('glUniform2uiEXT');
   glUniform3uiEXT := GLGetProcAddress('glUniform3uiEXT');
   glUniform4uiEXT := GLGetProcAddress('glUniform4uiEXT');
   glUniform1uivEXT := GLGetProcAddress('glUniform1uivEXT');
   glUniform2uivEXT := GLGetProcAddress('glUniform2uivEXT');
   glUniform3uivEXT := GLGetProcAddress('glUniform3uivEXT');
   glUniform4uivEXT := GLGetProcAddress('glUniform4uivEXT');
   glGetUniformuivEXT := GLGetProcAddress('glGetUniformuivEXT');
   glBindFragDataLocationEXT := GLGetProcAddress('glBindFragDataLocationEXT');
   glGetFragDataLocationEXT := GLGetProcAddress('glGetFragDataLocationEXT');
   glDrawArraysInstancedEXT := GLGetProcAddress('glDrawArraysInstancedEXT');
   glDrawElementsInstancedEXT := GLGetProcAddress('glDrawElementsInstancedEXT');
   // glFramebufferTextureLayerEXT:= GLGetProcAddress('glFramebufferTextureLayerEXT');
   glTexBufferEXT := GLGetProcAddress('glTexBufferEXT');
   glColorMaskIndexedEXT := GLGetProcAddress('glColorMaskIndexedEXT');
   glGetBooleanIndexedvEXT := GLGetProcAddress('glGetBooleanIndexedvEXT');
   glGetIntegerIndexedvEXT:= GLGetProcAddress('glGetIntegerIndexedvEXT');
   glEnableIndexedEXT:= GLGetProcAddress('glEnableIndexedEXT');
   glDisableIndexedEXT:= GLGetProcAddress('glDisableIndexedEXT');
   glIsEnabledIndexedEXT:= GLGetProcAddress('glIsEnabledIndexedEXT');
   glBindBufferRangeNV := GLGetProcAddress('glBindBufferRangeNV');
   glBindBufferOffsetNV := GLGetProcAddress('glBindBufferOffsetNV');
   glBindBufferBaseNV := GLGetProcAddress('glBindBufferBaseNV');
   glTransformFeedbackAttribsNV := GLGetProcAddress('glTransformFeedbackAttribsNV');
   glTransformFeedbackVaryingsNV := GLGetProcAddress('glTransformFeedbackVaryingsNV');
   glBeginTransformFeedbackNV := GLGetProcAddress('glBeginTransformFeedbackNV');
   glEndTransformFeedbackNV := GLGetProcAddress('glEndTransformFeedbackNV');
   glGetVaryingLocationNV := GLGetProcAddress('glGetVaryingLocationNV');
   glGetActiveVaryingNV := GLGetProcAddress('glGetActiveVaryingNV');
   glActiveVaryingNV := GLGetProcAddress('glActiveVaryingNV');
   glGetTransformFeedbackVaryingNV := GLGetProcAddress('glGetTransformFeedbackVaryingNV');
   glUniformBufferEXT := GLGetProcAddress('glUniformBufferEXT');
   glGetUniformBufferSizeEXT := GLGetProcAddress('glGetUniformBufferSizeEXT');
   glGetUniformOffsetEXT := GLGetProcAddress('glGetUniformOffsetEXT');
   glClearColorIiEXT := GLGetProcAddress('glClearColorIiEXT');
   glClearColorIuiEXT := GLGetProcAddress('glClearColorIuiEXT');
   glTexParameterIivEXT := GLGetProcAddress('glTexParameterIivEXT');
   glTexParameterIuivEXT := GLGetProcAddress('glTexParameterIuivEXT');
   glGetTexParameterIivEXT := GLGetProcAddress('glGetTexParameterIivEXT');
   glGetTexParameterIuivEXT := GLGetProcAddress('glGetTexParameterIuivEXT');
   glFrameTerminatorGREMEDY := GLGetProcAddress('glFrameTerminatorGREMEDY');
   glBeginConditionalRenderNV := GLGetProcAddress('glBeginConditionalRenderNV');
   glEndConditionalRenderNV := GLGetProcAddress('glEndConditionalRenderNV');
   glBindBufferRangeEXT := GLGetProcAddress('glBindBufferRangeEXT');
   glBindBufferOffsetEXT := GLGetProcAddress('glBindBufferOffsetEXT');
   glBindBufferBaseEXT := GLGetProcAddress('glBindBufferBaseEXT');
   glBeginTransformFeedbackEXT := GLGetProcAddress('glBeginTransformFeedbackEXT');
   glEndTransformFeedbackEXT := GLGetProcAddress('glEndTransformFeedbackEXT');
   glTransformFeedbackVaryingsEXT := GLGetProcAddress('glTransformFeedbackVaryingsEXT');
   glGetTransformFeedbackVaryingEXT:= GLGetProcAddress('glGetTransformFeedbackVaryingEXT');
   glTessellationFactorAMD := GLGetProcAddress('glTessellationFactorAMD');
   glTessellationModeAMD := GLGetProcAddress('glTessellationModeAMD');
   glCopyImageSubDataNV := GLGetProcAddress('glCopyImageSubDataNV');
   glMakeBufferResidentNV := GLGetProcAddress('glMakeBufferResidentNV');
   glMakeBufferNonResidentNV := GLGetProcAddress('glMakeBufferNonResidentNV');
   glIsBufferResidentNV := GLGetProcAddress('glIsBufferResidentNV');
   glMakeNamedBufferResidentNV := GLGetProcAddress('glMakeNamedBufferResidentNV');
   glMakeNamedBufferNonResidentNV := GLGetProcAddress('glMakeNamedBufferNonResidentNV');
   glIsNamedBufferResidentNV := GLGetProcAddress('glIsNamedBufferResidentNV');
   glGetBufferParameterui64vNV := GLGetProcAddress('glGetBufferParameterui64vNV');
   glGetNamedBufferParameterui64vNV := GLGetProcAddress('glGetNamedBufferParameterui64vNV');
   glGetIntegerui64vNV := GLGetProcAddress('glGetIntegerui64vNV');
   glUniformui64NV := GLGetProcAddress('glUniformui64NV');
   glUniformui64vNV := GLGetProcAddress('glUniformui64vNV');
   glGetUniformui64vNV := GLGetProcAddress('glGetUniformui64vNV');
   glProgramUniformui64NV := GLGetProcAddress('glProgramUniformui64NV');
   glProgramUniformui64vNV := GLGetProcAddress('glProgramUniformui64vNV');
   glBufferAddressRangeNV := GLGetProcAddress('glBufferAddressRangeNV');
   glVertexFormatNV := GLGetProcAddress('glVertexFormatNV');
   glNormalFormatNV := GLGetProcAddress('glNormalFormatNV');
   glColorFormatNV := GLGetProcAddress('glColorFormatNV');
   glIndexFormatNV := GLGetProcAddress('glIndexFormatNV');
   glTexCoordFormatNV := GLGetProcAddress('glTexCoordFormatNV');
   glEdgeFlagFormatNV := GLGetProcAddress('glEdgeFlagFormatNV');
   glSecondaryColorFormatNV := GLGetProcAddress('glSecondaryColorFormatNV');
   glFogCoordFormatNV := GLGetProcAddress('glFogCoordFormatNV');
   glVertexAttribFormatNV := GLGetProcAddress('glVertexAttribFormatNV');
   glVertexAttribIFormatNV := GLGetProcAddress('glVertexAttribIFormatNV');
   glGetIntegerui64i_vNV := GLGetProcAddress('glGetIntegerui64i_vNV');

//------ locate functions/procedures for Windows OpenGL (WGL) extensions -------
   {$IFDEF SUPPORT_WGL}
   ReadWGLExtensions;
   {$ENDIF}

//------------------- locate functions/procedures for GLX extensions -----------
   {$IFDEF SUPPORT_GLX}
   ReadGLXExtensions;
   {$ENDIF}
end;

{$IFDEF SUPPORT_WGL}
// ReadWGLExtensions
//
procedure ReadWGLExtensions;
begin
  wglCreateBufferRegionARB := GLGetProcAddress('wglCreateBufferRegionARB');
  wglDeleteBufferRegionARB := GLGetProcAddress('wglDeleteBufferRegionARB');
  wglSaveBufferRegionARB := GLGetProcAddress('wglSaveBufferRegionARB');
  wglRestoreBufferRegionARB := GLGetProcAddress('wglRestoreBufferRegionARB');
  wglGetExtensionsStringARB := GLGetProcAddress('wglGetExtensionsStringARB');
  wglGetPixelFormatAttribivARB := GLGetProcAddress('wglGetPixelFormatAttribivARB');
  wglGetPixelFormatAttribfvARB := GLGetProcAddress('wglGetPixelFormatAttribfvARB');
  wglChoosePixelFormatARB := GLGetProcAddress('wglChoosePixelFormatARB');
  wglMakeContextCurrentARB := GLGetProcAddress('wglMakeContextCurrentARB');
  wglGetCurrentReadDCARB := GLGetProcAddress('wglGetCurrentReadDCARB');
  wglCreatePbufferARB := GLGetProcAddress('wglCreatePbufferARB');
  wglGetPbufferDCARB := GLGetProcAddress('wglGetPbufferDCARB');
  wglReleasePbufferDCARB := GLGetProcAddress('wglReleasePbufferDCARB');
  wglDestroyPbufferARB := GLGetProcAddress('wglDestroyPbufferARB');
  wglQueryPbufferARB := GLGetProcAddress('wglQueryPbufferARB');
  wglBindTexImageARB := GLGetProcAddress('wglBindTexImageARB');
  wglReleaseTexImageARB := GLGetProcAddress('wglReleaseTexImageARB');
  wglSetPbufferAttribARB := GLGetProcAddress('wglSetPbufferAttribARB');
  wglCreateContextAttribsARB := GLGetProcAddress('wglCreateContextAttribsARB');
  wglSwapIntervalEXT := GLGetProcAddress('wglSwapIntervalEXT');
  wglGetSwapIntervalEXT := GLGetProcAddress('wglGetSwapIntervalEXT');
  wglAllocateMemoryNV := GLGetProcAddress('wglAllocateMemoryNV');
  wglFreeMemoryNV := GLGetProcAddress('wglFreeMemoryNV');
  wglEnumGpusNV := GLGetProcAddress('wglEnumGpusNV');
  wglEnumGpuDevicesNV := GLGetProcAddress('wglEnumGpuDevicesNV');
  wglCreateAffinityDCNV := GLGetProcAddress('wglCreateAffinityDCNV');
  wglEnumGpusFromAffinityDCNV := GLGetProcAddress('wglEnumGpusFromAffinityDCNV');
  wglDeleteDCNV := GLGetProcAddress('wglDeleteDCNV');
end;
{$ENDIF}

{$IFDEF SUPPORT_GLX}
procedure ReadGLXExtensions;
begin
   glXGetProcAddress := GLLibGetProcAddress('glXGetProcAddress');
   glXGetProcAddressARB := GLLibGetProcAddress('glXGetProcAddressARB');
   glXChooseFBConfig := GLGetProcAddress('glXChooseFBConfig');
   glXGetFBConfigAttrib := GLGetProcAddress('glXGetFBConfigAttrib');
   glXGetFBConfigs := GLGetProcAddress('glXGetFBConfigs');
   glXGetVisualFromFBConfig := GLGetProcAddress('glXGetVisualFromFBConfig');
   glXCreateWindow := GLGetProcAddress('glXCreateWindow');
   glXDestroyWindow := GLGetProcAddress('glXDestroyWindow');
   glXCreatePixmap := GLGetProcAddress('glXCreatePixmap');
   glXDestroyPixmap := GLGetProcAddress('glXDestroyPixmap');
   glXCreatePbuffer := GLGetProcAddress('glXCreatePbuffer');
   glXDestroyPbuffer := GLGetProcAddress('glXDestroyPbuffer');
   glXQueryDrawable := GLGetProcAddress('glXQueryDrawable');
   glXCreateNewContext := GLGetProcAddress('glXCreateNewContext');
   glXMakeContextCurrent := GLGetProcAddress('glXMakeContextCurrent');
   glXGetCurrentReadDrawable := GLGetProcAddress('glXGetCurrentReadDrawable');
   glXQueryContext := GLGetProcAddress('glXQueryContext');
   glXSelectEvent := GLGetProcAddress('glXSelectEvent');
    glXGetSelectedEvent := GLGetProcAddress('glXGetSelectedEvent');
    glXBindTexImageARB := GLGetProcAddress('glXBindTexImageARB');
    glXReleaseTexImageARB := GLGetProcAddress('glXReleaseTexImageARB');
    glxDrawableAttribARB := GLGetProcAddress('glxDrawableAttribARB');
    glXCreateContextAttribsARB := GLGetProcAddress('glXCreateContextAttribsARB');
    glXSwapIntervalSGI := GLGetProcAddress('glXSwapIntervalSGI');
    glXGetVideoSyncSGI := GLGetProcAddress('glXGetVideoSyncSGI');
    glXWaitVideoSyncSGI := GLGetProcAddress('glXWaitVideoSyncSGI');
    glXFreeContextEXT := GLGetProcAddress('glXFreeContextEXT');
    glXGetContextIDEXT := GLGetProcAddress('glXGetContextIDEXT');
    glXGetCurrentDisplayEXT := GLGetProcAddress('glXGetCurrentDisplayEXT');
    glXImportContextEXT := GLGetProcAddress('glXImportContextEXT');
    glXQueryContextInfoEXT := GLGetProcAddress('glXQueryContextInfoEXT');
    glXCopySubBufferMESA := GLGetProcAddress('glXCopySubBufferMESA');
    glXCreateGLXPixmapMESA := GLGetProcAddress('glXCreateGLXPixmapMESA');
    glXReleaseBuffersMESA := GLGetProcAddress('glXReleaseBuffersMESA');
    glXSet3DfxModeMESA := GLGetProcAddress('glXSet3DfxModeMESA');
    glXBindTexImageEXT := GLGetProcAddress('glXBindTexImageEXT');
    glXReleaseTexImageEXT := GLGetProcAddress('glXReleaseTexImageEXT');
    glXMakeCurrentReadSGI := GLGetProcAddress('glXMakeCurrentReadSGI');
    glXGetCurrentReadDrawableSGI := GLGetProcAddress('glXGetCurrentReadDrawableSGI');
    glXGetFBConfigAttribSGIX := GLGetProcAddress('glXGetFBConfigAttribSGIX');
    glXChooseFBConfigSGIX := GLGetProcAddress('glXChooseFBConfigSGIX');
    glXCreateGLXPixmapWithConfigSGIX := GLGetProcAddress('glXCreateGLXPixmapWithConfigSGIX');
    glXCreateContextWithConfigSGIX := GLGetProcAddress('glXCreateContextWithConfigSGIX');
    glXGetVisualFromFBConfigSGIX := GLGetProcAddress('glXGetVisualFromFBConfigSGIX');
    glXGetFBConfigFromVisualSGIX := GLGetProcAddress('glXGetFBConfigFromVisualSGIX');
    glXCreateGLXPbufferSGIX := GLGetProcAddress('glXCreateGLXPbufferSGIX');
    glXDestroyGLXPbufferSGIX := GLGetProcAddress('glXDestroyGLXPbufferSGIX');
    glXQueryGLXPbufferSGIX := GLGetProcAddress('glXQueryGLXPbufferSGIX');
    glXSelectEventSGIX := GLGetProcAddress('glXSelectEventSGIX');
    glXGetSelectedEventSGIX := GLGetProcAddress('glXGetSelectedEventSGIX');
    glXCushionSGI := GLGetProcAddress('glXCushionSGI');
    glXBindChannelToWindowSGIX := GLGetProcAddress('glXBindChannelToWindowSGIX');
    glXChannelRectSGIX := GLGetProcAddress('glXChannelRectSGIX');
    glXQueryChannelRectSGIX := GLGetProcAddress('glXQueryChannelRectSGIX');
    glXQueryChannelDeltasSGIX := GLGetProcAddress('glXQueryChannelDeltasSGIX');
    glXChannelRectSyncSGIX := GLGetProcAddress('glXChannelRectSyncSGIX');
    glXJoinSwapGroupSGIX := GLGetProcAddress('glXJoinSwapGroupSGIX');
    glXBindSwapBarrierSGIX := GLGetProcAddress('glXBindSwapBarrierSGIX');
    glXQueryMaxSwapBarriersSGIX := GLGetProcAddress('glXQueryMaxSwapBarriersSGIX');
    glXQueryHyperpipeNetworkSGIX := GLGetProcAddress('glXQueryHyperpipeNetworkSGIX');
    glXHyperpipeConfigSGIX := GLGetProcAddress('glXHyperpipeConfigSGIX');
    glXQueryHyperpipeConfigSGIX := GLGetProcAddress('glXQueryHyperpipeConfigSGIX');
    glXDestroyHyperpipeConfigSGIX := GLGetProcAddress('glXDestroyHyperpipeConfigSGIX');
    glXBindHyperpipeSGIX := GLGetProcAddress('glXBindHyperpipeSGIX');
    glXQueryHyperpipeBestAttribSGIX := GLGetProcAddress('glXQueryHyperpipeBestAttribSGIX');
    glXHyperpipeAttribSGIX := GLGetProcAddress('glXHyperpipeAttribSGIX');
    glXQueryHyperpipeAttribSGIX := GLGetProcAddress('glXQueryHyperpipeAttribSGIX');
    glXGetAGPOffsetMESA := GLGetProcAddress('glXGetAGPOffsetMESA');
    glXEnumerateVideoDevicesNV := GLGetProcAddress('glXEnumerateVideoDevicesNV');
    glXBindVideoDeviceNV := GLGetProcAddress('glXBindVideoDeviceNV');
    glxGetVideoDeviceNV := GLGetProcAddress('glxGetVideoDeviceNV');
    glXCopySubBufferMESA := GLGetProcAddress('glXCopySubBufferMESA');
    glXReleaseBuffersMESA := GLGetProcAddress('glXReleaseBuffersMESA');
    glXCreateGLXPixmapMESA := GLGetProcAddress('glXCreateGLXPixmapMESA');
    glXSet3DfxModeMESA := GLGetProcAddress('glXSet3DfxModeMESA');
    glXAllocateMemoryNV := GLGetProcAddress('glXAllocateMemoryNV');
    glXFreeMemoryNV := GLGetProcAddress('glXFreeMemoryNV');
    glXReleaseVideoDeviceNV := GLGetProcAddress('glXReleaseVideoDeviceNV');
    glXBindVideoImageNV := GLGetProcAddress('glXBindVideoImageNV');
    glXReleaseVideoImageNV := GLGetProcAddress('glXReleaseVideoImageNV');
    glXSendPbufferToVideoNV := GLGetProcAddress('glXSendPbufferToVideoNV');
    glXGetVideoInfoNV := GLGetProcAddress('glXGetVideoInfoNV');
    glXJoinSwapGroupNV := GLGetProcAddress('glXJoinSwapGroupNV');
    glXBindSwapBarrierNV := GLGetProcAddress('glXBindSwapBarrierNV');
    glXQuerySwapGroupNV := GLGetProcAddress('glXQuerySwapGroupNV');
    glXQueryMaxSwapGroupsNV := GLGetProcAddress('glXQueryMaxSwapGroupsNV');
    glXQueryFrameCountNV := GLGetProcAddress('glXQueryFrameCountNV');
    glXResetFrameCountNV := GLGetProcAddress('glXResetFrameCountNV');
    glXBindVideoCaptureDeviceNV := GLGetProcAddress('glXBindVideoCaptureDeviceNV');
    glXEnumerateVideoCaptureDevicesNV := GLGetProcAddress('glXEnumerateVideoCaptureDevicesNV');
    glxLockVideoCaptureDeviceNV := GLGetProcAddress('glxLockVideoCaptureDeviceNV');
    glXQueryVideoCaptureDeviceNV := GLGetProcAddress('glXQueryVideoCaptureDeviceNV');
    glXReleaseVideoCaptureDeviceNV := GLGetProcAddress('glXReleaseVideoCaptureDeviceNV');
    glXSwapIntervalEXT := GLGetProcAddress('glXSwapIntervalEXT');
    glXCopyImageSubDataNV := GLGetProcAddress('glXCopyImageSubDataNV');
end;
{$ENDIF}

procedure TrimAndSplitVersionString(Buffer: String; out Max, Min: Integer);
// Peels out the X.Y form from the given Buffer which must contain a version string like "text Minor.Major.Build text"
// at least however "Major.Minor".
var
  Separator: Integer;
begin
  try
    // There must be at least one dot to separate major and minor version number.
    Separator := Pos('.', Buffer);
    // At least one number must be before and one after the dot.
    if (Separator > 1) and (Separator < Length(Buffer)) and 
	  (AnsiChar(Buffer[Separator - 1]) in ['0'..'9']) and
      (AnsiChar(Buffer[Separator + 1]) in ['0'..'9']) then
    begin
      // OK, it's a valid version string. Now remove unnecessary parts.
      Dec(Separator);
      // Find last non-numeric character before version number.
      while (Separator > 0) and (AnsiChar(Buffer[Separator]) in ['0'..'9']) do
        Dec(Separator);
      // Delete leading characters which do not belong to the version string.
      Delete(Buffer, 1, Separator);
      Separator := Pos('.', Buffer) + 1;
      // Find first non-numeric character after version number
      while (Separator <= Length(Buffer)) and 
	    (AnsiChar(Buffer[Separator]) in ['0'..'9']) do
        Inc(Separator);
      // delete trailing characters not belonging to the version string
      Delete(Buffer, Separator, 255);
      // Now translate the numbers.
      Separator := Pos('.', Buffer); // This is necessary because the buffer length might have changed.
      Max := StrToInt(Copy(Buffer, 1, Separator - 1));
      Min := StrToInt(Copy(Buffer, Separator + 1, 255));
    end
    else
      Abort;
  except
    Min := 0;
    Max := 0;
  end;
end;

function IsVersionMet(MajorVersion, MinorVersion, actualMajorVersion,
  actualMinorVersion: Integer): Boolean;
begin
  Result := (actualMajorVersion > MajorVersion) or
    ((actualMajorVersion = MajorVersion) and
    (actualMinorVersion >= MinorVersion));
end;

procedure ReadImplementationProperties;
var
   Buffer : String;
   MajorVersion, MinorVersion: Integer;

   // Checks if the given Extension string is in Buffer.
   function CheckExtension(const Extension: string): Boolean; //PALOFF
   var
     ExtPos: Integer;
   begin
     // First find the position of the extension string as substring in Buffer.
     ExtPos := Pos(Extension, Buffer);
     Result := ExtPos > 0;
     // Now check that it isn't only a substring of another extension.
     if Result then
       Result := ((ExtPos + Length(Extension) - 1)= Length(Buffer))
                 or (Buffer[ExtPos + Length(Extension)]=' ');
   end;

begin
  // determine OpenGL versions supported
  Buffer := string(glGetString(GL_VERSION));
  TrimAndSplitVersionString(Buffer, MajorVersion, MinorVersion);
  GL_VERSION_1_0 := True;
  GL_VERSION_1_1 := IsVersionMet(1, 1, MajorVersion, MinorVersion);
  GL_VERSION_1_2 := IsVersionMet(1, 2, MajorVersion, MinorVersion);
  GL_VERSION_1_3 := IsVersionMet(1, 3, MajorVersion, MinorVersion);
  GL_VERSION_1_4 := IsVersionMet(1, 4, MajorVersion, MinorVersion);
  GL_VERSION_1_5 := IsVersionMet(1, 5, MajorVersion, MinorVersion);
  GL_VERSION_2_0 := IsVersionMet(2, 0, MajorVersion, MinorVersion);
  GL_VERSION_2_1 := IsVersionMet(2, 1, MajorVersion, MinorVersion);
  GL_VERSION_3_0 := IsVersionMet(3, 0, MajorVersion, MinorVersion);
  GL_VERSION_3_1 := IsVersionMet(3, 1, MajorVersion, MinorVersion);
  GL_VERSION_3_2 := IsVersionMet(3, 2, MajorVersion, MinorVersion);
  GL_VERSION_3_3 := IsVersionMet(3, 3, MajorVersion, MinorVersion);
  GL_VERSION_4_0 := IsVersionMet(4, 0, MajorVersion, MinorVersion);
  GL_VERSION_4_1 := IsVersionMet(4, 1, MajorVersion, MinorVersion);
  GL_VERSION_4_2 := IsVersionMet(4, 2, MajorVersion, MinorVersion);
  GL_VERSION_4_3 := IsVersionMet(4, 3, MajorVersion, MinorVersion);
  GL_VERSION_4_4 := IsVersionMet(4, 4, MajorVersion, MinorVersion);
  GL_VERSION_4_5 := IsVersionMet(4, 5, MajorVersion, MinorVersion);

   // determine GLU versions met
   buffer:=String(gluGetString(GLU_VERSION));
   TrimAndSplitVersionString(buffer, majorversion, minorVersion);
   GLU_VERSION_1_1:=True; // won't load without at least GLU 1.1
   GLU_VERSION_1_2:=IsVersionMet(1,2,majorVersion,minorVersion);
   GLU_VERSION_1_3:=IsVersionMet(1,3,majorVersion,minorVersion);
   // check supported OpenGL extensions
   Buffer := String(glGetString(GL_EXTENSIONS));
   GL_ARB_blend_func_extended := CheckExtension('GL_ARB_blend_func_extended');
   GL_ARB_color_buffer_float := CheckExtension('GL_ARB_color_buffer_float');
   GL_ARB_compatibility := CheckExtension('GL_ARB_compatibility');
   GL_ARB_copy_buffer := CheckExtension('GL_ARB_copy_buffer');
   GL_ARB_debug_output := CheckExtension('GL_ARB_debug_output');
   GL_ARB_depth_buffer_float := CheckExtension('GL_ARB_depth_buffer_float');
   GL_ARB_depth_clamp := CheckExtension('GL_ARB_depth_clamp');
   GL_ARB_depth_texture := CheckExtension('GL_ARB_depth_texture');
   GL_ARB_draw_buffers := CheckExtension('GL_ARB_draw_buffers');
   GL_ARB_draw_buffers_blend := CheckExtension('GL_ARB_draw_buffers_blend');
   GL_ARB_draw_elements_base_vertex := CheckExtension('GL_ARB_draw_elements_base_vertex');
   GL_ARB_draw_indirect := CheckExtension('GL_ARB_draw_indirect');
   GL_ARB_draw_instanced := CheckExtension('GL_ARB_draw_instanced');
   GL_ARB_ES2_compatibility := CheckExtension('GL_ARB_ES2_compatibility');
   GL_ARB_explicit_attrib_location := CheckExtension('GL_ARB_explicit_attrib_location');
   GL_ARB_fragment_coord_conventions := CheckExtension('GL_ARB_fragment_coord_conventions');
   GL_ARB_fragment_program := CheckExtension('GL_ARB_fragment_program');
   GL_ARB_fragment_program_shadow := CheckExtension('GL_ARB_fragment_program_shadow');
   GL_ARB_fragment_shader := CheckExtension('GL_ARB_fragment_shader');
   GL_ARB_framebuffer_object := CheckExtension('GL_ARB_framebuffer_object');
   GL_ARB_framebuffer_sRGB := CheckExtension('GL_ARB_framebuffer_sRGB');
   GL_ARB_geometry_shader4 := CheckExtension('GL_ARB_geometry_shader4');
   GL_ARB_get_program_binary := CheckExtension('GL_ARB_get_program_binary');
   GL_ARB_gpu_shader_fp64 := CheckExtension('GL_ARB_gpu_shader_fp64');
   GL_ARB_gpu_shader5 := CheckExtension('GL_ARB_gpu_shader5');
   GL_ARB_half_float_pixel := CheckExtension('GL_ARB_half_float_pixel');
   GL_ARB_half_float_vertex := CheckExtension('GL_ARB_half_float_vertex');
   GL_ARB_imaging := CheckExtension('GL_ARB_imaging');
   GL_ARB_instanced_arrays := CheckExtension('GL_ARB_instanced_arrays');
   GL_ARB_map_buffer_range := CheckExtension('GL_ARB_map_buffer_range');
   GL_ARB_matrix_palette  := CheckExtension('GL_ARB_matrix_palette');
   GL_ARB_multisample := CheckExtension(' GL_ARB_multisample'); // ' ' to avoid collision with WGL variant
   GL_ARB_multitexture := CheckExtension('GL_ARB_multitexture');
   GL_ARB_occlusion_query := CheckExtension('GL_ARB_occlusion_query');
   GL_ARB_occlusion_query2 := CheckExtension('GL_ARB_occlusion_query2');
   GL_ARB_pixel_buffer_object := CheckExtension('GL_ARB_pixel_buffer_object');
   GL_ARB_point_parameters := CheckExtension('GL_ARB_point_parameters');
   GL_ARB_point_sprite := CheckExtension('GL_ARB_point_sprite');
   GL_ARB_provoking_vertex := CheckExtension('GL_ARB_provoking_vertex');
   GL_ARB_robustness := CheckExtension('GL_ARB_robustness');
   GL_ARB_sample_shading := CheckExtension('GL_ARB_sample_shading');
   GL_ARB_sampler_objects := CheckExtension('GL_ARB_sampler_objects');
   GL_ARB_seamless_cube_map := CheckExtension('GL_ARB_seamless_cube_map');
   GL_ARB_separate_shader_objects := CheckExtension('GL_ARB_separate_shader_objects');
   GL_ARB_shader_bit_encoding := CheckExtension('GL_ARB_shader_bit_encoding');
   GL_ARB_shader_precision := CheckExtension('GL_ARB_shader_precision');
   GL_ARB_shader_objects := CheckExtension('GL_ARB_shader_objects');
   GL_ARB_shader_stencil_export := CheckExtension('GL_ARB_shader_stencil_export');
   GL_ARB_shader_subroutine := CheckExtension('GL_ARB_shader_subroutine');
   GL_ARB_shader_texture_lod := CheckExtension('GL_ARB_shader_texture_lod');
   GL_ARB_shading_language_100 := CheckExtension('GL_ARB_shading_language_100');
   GL_ARB_shadow := CheckExtension('GL_ARB_shadow');
   GL_ARB_shadow_ambient := CheckExtension('GL_ARB_shadow_ambient');
   GL_ARB_sync := CheckExtension('GL_ARB_sync');
   GL_ARB_tessellation_shader := CheckExtension('GL_ARB_tessellation_shader');
   GL_ARB_texture_border_clamp := CheckExtension('GL_ARB_texture_border_clamp');
   GL_ARB_texture_buffer_object := CheckExtension('GL_ARB_texture_buffer_object');
   GL_ARB_texture_buffer_object_rgb32 := CheckExtension('GL_ARB_texture_buffer_object_rgb32');
   GL_ARB_texture_compression := CheckExtension('GL_ARB_texture_compression');
   GL_ARB_texture_compression_rgtc := CheckExtension('GL_ARB_texture_compression_rgtc');
   GL_ARB_texture_cube_map := CheckExtension('GL_ARB_texture_cube_map');
   GL_ARB_texture_cube_map_array := CheckExtension('GL_ARB_texture_cube_map_array');
   GL_ARB_texture_env_add := CheckExtension('GL_ARB_texture_env_add');
   GL_ARB_texture_env_combine := CheckExtension('GL_ARB_texture_env_combine');
   GL_ARB_texture_env_crossbar := CheckExtension('GL_ARB_texture_env_crossbar');
   GL_ARB_texture_env_dot3 := CheckExtension('GL_ARB_texture_env_dot3');
   GL_ARB_texture_float := CheckExtension('GL_ARB_texture_float');
   GL_ARB_texture_gather := CheckExtension('GL_ARB_texture_gather');
   GL_ARB_texture_mirrored_repeat := CheckExtension('GL_ARB_texture_mirrored_repeat');
   GL_ARB_texture_multisample := CheckExtension('GL_ARB_texture_multisample');
   GL_ARB_texture_non_power_of_two := CheckExtension('GL_ARB_texture_non_power_of_two');
   GL_ARB_texture_query_lod := CheckExtension('GL_ARB_texture_query_lod');
   GL_ARB_texture_rectangle := CheckExtension('GL_ARB_texture_rectangle');
   GL_ARB_texture_rg := CheckExtension('GL_ARB_texture_rg');
   GL_ARB_texture_rgb10_a2ui := CheckExtension('GL_ARB_texture_rgb10_a2ui');
   GL_ARB_texture_swizzle := CheckExtension('GL_ARB_texture_swizzle');
   GL_ARB_timer_query := CheckExtension('GL_ARB_timer_query');
   GL_ARB_transform_feedback2 := CheckExtension('GL_ARB_transform_feedback2');
   GL_ARB_transform_feedback3 := CheckExtension('GL_ARB_transform_feedback3');
   GL_ARB_transpose_matrix := CheckExtension('GL_ARB_transpose_matrix');
   GL_ARB_uniform_buffer_object := CheckExtension('GL_ARB_uniform_buffer_object');
   GL_ARB_vertex_array_bgra := CheckExtension('GL_ARB_vertex_array_bgra');
   GL_ARB_vertex_array_object := CheckExtension('GL_ARB_vertex_array_object');
   GL_ARB_vertex_attrib_64bit := CheckExtension('GL_ARB_vertex_attrib_64bit');
   GL_ARB_vertex_blend := CheckExtension('GL_ARB_vertex_blend');
   GL_ARB_vertex_buffer_object := CheckExtension('GL_ARB_vertex_buffer_object');
   GL_ARB_vertex_program := CheckExtension('GL_ARB_vertex_program');
   GL_ARB_vertex_shader := CheckExtension('GL_ARB_vertex_shader');
   GL_ARB_vertex_type_2_10_10_10_rev := CheckExtension('GL_ARB_vertex_type_2_10_10_10_rev');
   GL_ARB_viewport_array := CheckExtension('GL_ARB_viewport_array');
   GL_ARB_window_pos := CheckExtension('GL_ARB_window_pos');
   GL_ARB_texture_compression_bptc := CheckExtension('GL_ARB_texture_compression_bptc');
   GL_3DFX_multisample := CheckExtension('GL_3DFX_multisample');
   GL_3DFX_tbuffer := CheckExtension('GL_3DFX_tbuffer');
   GL_3DFX_texture_compression_FXT1 := CheckExtension('GL_3DFX_texture_compression_FXT1');
   GL_ATI_draw_buffers := CheckExtension('GL_ATI_draw_buffers');
//   GL_ATI_texture_compression_3dc := CheckExtension('GL_ATI_texture_compression_3dc');
   GL_ATI_texture_float := CheckExtension('GL_ATI_texture_float');
   GL_ATI_texture_mirror_once := CheckExtension('GL_ATI_texture_mirror_once');
   GL_S3_s3tc := CheckExtension('GL_S3_s3tc');
   GL_EXT_abgr := CheckExtension('GL_EXT_abgr');
   GL_EXT_bgra := CheckExtension('GL_EXT_bgra');
   GL_EXT_bindable_uniform := CheckExtension('GL_EXT_bindable_uniform');
   GL_EXT_blend_color := CheckExtension('GL_EXT_blend_color');
   GL_EXT_blend_equation_separate := CheckExtension('GL_EXT_blend_equation_separate');
   GL_EXT_blend_func_separate := CheckExtension('GL_EXT_blend_func_separate');
   GL_EXT_blend_logic_op := CheckExtension('GL_EXT_blend_logic_op');
   GL_EXT_blend_minmax := CheckExtension('GL_EXT_blend_minmax');
   GL_EXT_blend_subtract := CheckExtension('GL_EXT_blend_subtract');
///   GL_EXT_Cg_shader := CheckExtension('GL_EXT_Cg_shader');
   GL_EXT_clip_volume_hint := CheckExtension('GL_EXT_clip_volume_hint');
   GL_EXT_compiled_vertex_array := CheckExtension('GL_EXT_compiled_vertex_array');
   GL_EXT_copy_texture := CheckExtension('GL_EXT_copy_texture');
   GL_EXT_depth_bounds_test := CheckExtension('GL_EXT_depth_bounds_test');
   GL_EXT_draw_buffers2 := CheckExtension('GL_EXT_draw_buffers2');
   GL_EXT_draw_instanced := CheckExtension('GL_EXT_draw_instanced');
   GL_EXT_draw_range_elements := CheckExtension('GL_EXT_draw_range_elements');
   GL_EXT_fog_coord := CheckExtension('GL_EXT_fog_coord');
   GL_EXT_framebuffer_blit := CheckExtension('GL_EXT_framebuffer_blit');
   GL_EXT_framebuffer_multisample := CheckExtension('GL_EXT_framebuffer_multisample');
   GL_EXT_framebuffer_object := CheckExtension('GL_EXT_framebuffer_object');
   GL_EXT_framebuffer_sRGB := CheckExtension('GL_EXT_framebuffer_sRGB');
   GL_EXT_geometry_shader4 := CheckExtension('GL_EXT_geometry_shader4');
   GL_EXT_gpu_program_parameters := CheckExtension('GL_EXT_gpu_program_parameters');
   GL_EXT_gpu_shader4 := CheckExtension('GL_EXT_gpu_shader4');
   GL_EXT_multi_draw_arrays := CheckExtension('GL_EXT_multi_draw_arrays');
   GL_EXT_multisample := CheckExtension('GL_EXT_multisample');
   GL_EXT_packed_depth_stencil := CheckExtension('GL_EXT_packed_depth_stencil');
   GL_EXT_packed_float := CheckExtension('GL_EXT_packed_float');
   GL_EXT_packed_pixels := CheckExtension('GL_EXT_packed_pixels');
   GL_EXT_paletted_texture := CheckExtension('GL_EXT_paletted_texture');
   GL_EXT_pixel_buffer_object := CheckExtension('GL_EXT_pixel_buffer_object');
   GL_EXT_polygon_offset := CheckExtension('GL_EXT_polygon_offset');
   GL_EXT_rescale_normal := CheckExtension('GL_EXT_rescale_normal');
   GL_EXT_secondary_color := CheckExtension('GL_EXT_secondary_color');
   GL_EXT_separate_specular_color := CheckExtension('GL_EXT_separate_specular_color');
   GL_EXT_shadow_funcs := CheckExtension('GL_EXT_shadow_funcs');
   GL_EXT_shared_texture_palette := CheckExtension('GL_EXT_shared_texture_palette');
   GL_EXT_stencil_clear_tag := CheckExtension('GL_EXT_stencil_clear_tag');
   GL_EXT_stencil_two_side := CheckExtension('GL_EXT_stencil_two_side');
   GL_EXT_stencil_wrap := CheckExtension('GL_EXT_stencil_wrap');
   GL_EXT_texture3D := CheckExtension('GL_EXT_texture3D');
   GL_EXT_texture_array := CheckExtension('GL_EXT_texture_array');
   GL_EXT_texture_buffer_object := CheckExtension('GL_EXT_texture_buffer_object');
   GL_EXT_texture_compression_latc := CheckExtension('GL_EXT_texture_compression_latc');
   GL_EXT_texture_compression_rgtc := CheckExtension('GL_EXT_texture_compression_rgtc');
   GL_EXT_texture_compression_s3tc := CheckExtension('GL_EXT_texture_compression_s3tc');
   GL_EXT_texture_cube_map := CheckExtension('GL_EXT_texture_cube_map');
   GL_EXT_texture_edge_clamp := CheckExtension('GL_EXT_texture_edge_clamp');
   GL_EXT_texture_env_add := CheckExtension('GL_EXT_texture_env_add');
   GL_EXT_texture_env_combine := CheckExtension('GL_EXT_texture_env_combine');
   GL_EXT_texture_env_dot3 := CheckExtension('GL_EXT_texture_env_dot3');
   GL_EXT_texture_filter_anisotropic := CheckExtension('GL_EXT_texture_filter_anisotropic');
   GL_EXT_texture_integer := CheckExtension('GL_EXT_texture_integer');
///   GL_EXT_texture_lod := CheckExtension('GL_EXT_texture_lod');
   GL_EXT_texture_lod_bias := CheckExtension('GL_EXT_texture_lod_bias');
   GL_EXT_texture_mirror_clamp := CheckExtension('GL_EXT_texture_mirror_clamp');
   GL_EXT_texture_object := CheckExtension('GL_EXT_texture_object');
   GL_EXT_texture_rectangle := CheckExtension('GL_EXT_texture_rectangle');
   GL_EXT_texture_sRGB := CheckExtension('GL_EXT_texture_sRGB');
   GL_EXT_texture_shared_exponent := CheckExtension('GL_EXT_texture_shared_exponent');
   GL_EXT_timer_query := CheckExtension('GL_EXT_timer_query');
   GL_EXT_transform_feedback := CheckExtension('GL_EXT_transform_feedback');
   GL_EXT_vertex_array := CheckExtension('GL_EXT_vertex_array');
   GL_HP_occlusion_test := CheckExtension('GL_HP_occlusion_test');
   GL_IBM_rasterpos_clip := CheckExtension('GL_IBM_rasterpos_clip');
///   GL_KTX_buffer_region := CheckExtension('GL_KTX_buffer_region');
   GL_MESA_resize_buffers := CheckExtension('GL_MESA_resize_buffers');
   GL_NV_blend_square := CheckExtension('GL_NV_blend_square');
   GL_NV_conditional_render := CheckExtension('GL_NV_conditional_render');
   GL_NV_copy_image := CheckExtension('GL_NV_copy_image');
   GL_NV_depth_buffer_float := CheckExtension('GL_NV_depth_buffer_float');
   GL_NV_fence := CheckExtension('GL_NV_fence');
   GL_NV_float_buffer := CheckExtension('GL_NV_float_buffer');
   GL_NV_fog_distance := CheckExtension('GL_NV_fog_distance');
   GL_NV_geometry_program4 := CheckExtension('GL_NV_geometry_program4');
   GL_NV_light_max_exponent := CheckExtension('GL_NV_light_max_exponent');
   GL_NV_multisample_filter_hint  := CheckExtension('GL_NV_multisample_filter_hint');
   GL_NV_occlusion_query := CheckExtension('GL_NV_occlusion_query');
   GL_NV_point_sprite := CheckExtension('GL_NV_point_sprite');
   GL_NV_primitive_restart := CheckExtension('GL_NV_primitive_restart');
   GL_NV_register_combiners := CheckExtension('GL_NV_register_combiners');
   GL_NV_shader_buffer_load := CheckExtension('GL_NV_shader_buffer_load');
   GL_NV_texgen_reflection := CheckExtension('GL_NV_texgen_reflection');
   GL_NV_texture_compression_vtc := CheckExtension('GL_NV_texture_compression_vtc');
   GL_NV_texture_env_combine4 := CheckExtension('GL_NV_texture_env_combine4');
   GL_NV_texture_rectangle := CheckExtension('GL_NV_texture_rectangle');
   GL_NV_texture_shader := CheckExtension('GL_NV_texture_shader');
   GL_NV_texture_shader2 := CheckExtension('GL_NV_texture_shader2');
   GL_NV_texture_shader3 := CheckExtension('GL_NV_texture_shader3');
   GL_NV_transform_feedback := CheckExtension('GL_NV_transform_feedback');
   GL_NV_vertex_array_range := CheckExtension('GL_NV_vertex_array_range');
   GL_NV_vertex_array_range2 := CheckExtension('GL_NV_vertex_array_range2');
   GL_NV_vertex_buffer_unified_memory := CheckExtension('GL_NV_vertex_buffer_unified_memory');
   GL_NV_vertex_program := CheckExtension('GL_NV_vertex_program');
   GL_SGI_color_matrix := CheckExtension('GL_SGI_color_matrix');
   GL_SGIS_generate_mipmap := CheckExtension('GL_SGIS_generate_mipmap');
   GL_SGIS_multisample := CheckExtension('GL_SGIS_multisample');
   GL_SGIS_texture_border_clamp := CheckExtension('GL_SGIS_texture_border_clamp');
   GL_SGIS_texture_color_mask := CheckExtension('GL_SGIS_texture_color_mask');
   GL_SGIS_texture_edge_clamp := CheckExtension('GL_SGIS_texture_edge_clamp');
   GL_SGIS_texture_lod := CheckExtension('GL_SGIS_texture_lod');
   GL_SGIX_depth_texture := CheckExtension('GL_SGIX_depth_texture');
   GL_SGIX_shadow := CheckExtension('GL_SGIX_shadow');
   GL_SGIX_shadow_ambient := CheckExtension('GL_SGIX_shadow_ambient');
///   GL_AMD_vertex_shader_tessellator := CheckExtension('GL_AMD_vertex_shader_tessellator');
///   GL_WIN_swap_hint := CheckExtension('GL_WIN_swap_hint');
///   GL_GREMEDY_frame_terminator := CheckExtension('GL_GREMEDY_frame_terminator');
///   GL_GREMEDY_string_marker := CheckExtension('GL_GREMEDY_string_marker');
   // check supported GLU extensions
   Buffer := String(gluGetString(GLU_EXTENSIONS));
///   GLU_EXT_nurbs_tessellator := CheckExtension('GLU_EXT_nurbs_tessellator');
///   GLU_EXT_object_space_tess := CheckExtension('GLU_EXT_object_space_tess');
///   GLU_EXT_TEXTURE := CheckExtension('GLU_EXT_TEXTURE');

   {$IFDEF SUPPORT_WGL}
   //check supported WGL extensions
   ReadWGLImplementationProperties;
   {$ENDIF}

   {$IFDEF SUPPORT_GLX}
   //check supported GLX extensions
   ReadGLXImplementationProperties;
   {$ENDIF}
end;

{$IFDEF SUPPORT_WGL}
procedure ReadWGLImplementationProperties;
var
   Buffer: string;
   // Checks if the given Extension string is in Buffer.
   function CheckExtension(const Extension: string): Boolean; //PALOFF
   var
     ExtPos: Integer;
   begin
     // First find the position of the extension string as substring in Buffer.
     ExtPos := Pos(Extension, Buffer);
     Result := ExtPos > 0;
     // Now check that it isn't only a substring of another extension.
     if Result then
       Result := ((ExtPos + Length(Extension) - 1)= Length(Buffer))
                 or (Buffer[ExtPos + Length(Extension)]=' ');
   end;

begin
   // ARB wgl extensions
   if Assigned(wglGetExtensionsStringARB) then
      Buffer:=String(wglGetExtensionsStringARB(wglGetCurrentDC))
   else Buffer:='';
   WGL_ARB_buffer_region:=CheckExtension('WGL_ARB_buffer_region');
   WGL_ARB_create_context := CheckExtension('WGL_ARB_create_context');
   WGL_ARB_create_context_profile := CheckExtension('WGL_ARB_create_context_profile');
   WGL_ARB_extensions_string:=CheckExtension('WGL_ARB_extensions_string');
   WGL_ARB_framebuffer_sRGB := CheckExtension('WGL_ARB_framebuffer_sRGB');
   WGL_ARB_make_current_read:=CheckExtension('WGL_ARB_make_current_read');
   WGL_ARB_multisample:=CheckExtension('WGL_ARB_multisample');
   WGL_ARB_pbuffer:=CheckExtension('WGL_ARB_pbuffer');
   WGL_ARB_pixel_format:=CheckExtension('WGL_ARB_pixel_format');
   WGL_ARB_pixel_format_float:=CheckExtension('WGL_ARB_pixel_format_float');
   WGL_ARB_render_texture:=CheckExtension('WGL_ARB_render_texture');
   // Vendor/EXT wgl extensions
   WGL_ATI_pixel_format_float := CheckExtension('WGL_ATI_pixel_format_float');
   WGL_EXT_pbuffer := CheckExtension('WGL_EXT_pbuffer');
   WGL_EXT_pixel_format := CheckExtension('WGL_EXT_pixel_format');
   WGL_EXT_swap_control := CheckExtension('WGL_EXT_swap_control');
   WGL_NV_gpu_affinity := CheckExtension('WGL_NV_gpu_affinity');
end;
{$ENDIF}

{$IFDEF SUPPORT_GLX}
procedure ReadGLXImplementationProperties;
var
   Buffer: string;
   MajorVersion, MinorVersion: Integer;
   Dpy: PDisplay;
   // Checks if the given Extension string is in Buffer.
   function CheckExtension(const Extension: string): Boolean;
   var
     ExtPos: Integer;
   begin
     // First find the position of the extension string as substring in Buffer.
     ExtPos := Pos(Extension, Buffer);
     Result := ExtPos > 0;
     // Now check that it isn't only a substring of another extension.
     if Result then
       Result := ((ExtPos + Length(Extension) - 1)= Length(Buffer))
                 or (Buffer[ExtPos + Length(Extension)]=' ');
   end;
begin
   Dpy:=glXGetCurrentDisplay();
   buffer:=String(glXQueryServerString(Dpy, XDefaultScreen(Dpy), GLX_VERSION));
   TrimAndSplitVersionString(buffer, majorversion, minorVersion);
   GLX_VERSION_1_1:=IsVersionMet(1,1,majorVersion,minorVersion);
   GLX_VERSION_1_2:=IsVersionMet(1,2,majorVersion,minorVersion);
   GLX_VERSION_1_3:=IsVersionMet(1,3,majorVersion,minorVersion);
   GLX_VERSION_1_4:=IsVersionMet(1,4,majorVersion,minorVersion);

   // This procedure will probably need changing, as totally untested
   // This might only work if GLX functions/procedures are loaded dynamically
   if Assigned(glXQueryExtensionsString) then
     Buffer := glXQueryExtensionsString(Dpy, 0)  //guess at a valid screen
   else
     Buffer:='';
   GLX_ARB_create_context := CheckExtension('GLX_ARB_create_context');
   GLX_ARB_create_context_profile := CheckExtension('GLX_ARB_create_context_profile');
   GLX_ARB_framebuffer_sRGB := CheckExtension('GLX_ARB_framebuffer_sRGB');
   GLX_EXT_framebuffer_sRGB := CheckExtension('GLX_EXT_framebuffer_sRGB');
   GLX_EXT_fbconfig_packed_float := CheckExtension('GLX_EXT_fbconfig_packed_float');
   GLX_SGI_swap_control := CheckExtension('GLX_SGI_swap_control');
   GLX_ARB_multisample := CheckExtension('GLX_ARB_multisample');
   GLX_SGIS_multisample	 := CheckExtension('GLX_SGIS_multisample');
   GLX_EXT_visual_info	 := CheckExtension('GLX_EXT_visual_info');
   GLX_SGI_video_sync := CheckExtension('GLX_SGI_video_sync');
   GLX_SGI_make_current_read := CheckExtension('GLX_SGI_make_current_read');
   GLX_SGIX_video_source := CheckExtension('GLX_SGIX_video_source');
   GLX_EXT_visual_rating := CheckExtension('GLX_EXT_visual_rating');
   GLX_EXT_import_context := CheckExtension('GLX_EXT_import_context');
   GLX_SGIX_fbconfig := CheckExtension('GLX_SGIX_fbconfig');
   GLX_SGIX_pbuffer := CheckExtension('GLX_SGIX_pbuffer');
   GLX_SGI_cushion := CheckExtension('GLX_SGI_cushion');
   GLX_SGIX_video_resize := CheckExtension('GLX_SGIX_video_resize');
   GLX_SGIX_dmbuffer := CheckExtension('GLX_SGIX_dmbuffer');
   GLX_SGIX_swap_group := CheckExtension('GLX_SGIX_swap_group');
   GLX_SGIX_swap_barrier := CheckExtension('GLX_SGIX_swap_barrier');
   GLX_SGIS_blended_overlay := CheckExtension('GLX_SGIS_blended_overlay');
   GLX_SGIS_shared_multisample	 := CheckExtension('GLX_SGIS_shared_multisample');
   GLX_SUN_get_transparent_index := CheckExtension('GLX_SUN_get_transparent_index');
   GLX_3DFX_multisample	 := CheckExtension('GLX_3DFX_multisample');
   GLX_MESA_copy_sub_buffer := CheckExtension('GLX_MESA_copy_sub_buffer');
   GLX_MESA_pixmap_colormap := CheckExtension('GLX_MESA_pixmap_colormap');
   GLX_MESA_release_buffers := CheckExtension('GLX_MESA_release_buffers');
   GLX_MESA_set_3dfx_mode := CheckExtension('GLX_MESA_set_3dfx_mode');
   GLX_SGIX_visual_select_group	 := CheckExtension('GLX_SGIX_visual_select_group');
   GLX_SGIX_hyperpipe  := CheckExtension('GLX_SGIX_hyperpipe');
end;
{$ENDIF}

procedure CloseOpenGL;
begin
   if GLHandle<>INVALID_MODULEHANDLE then begin
      FreeLibrary(Cardinal(GLHandle));
      GLHandle:=INVALID_MODULEHANDLE;
   end;

   if GLUHandle<>INVALID_MODULEHANDLE then begin
      FreeLibrary(Cardinal(GLUHandle));
      GLUHandle:=INVALID_MODULEHANDLE;
   end;
end;

function InitOpenGL : Boolean;
begin
   if (GLHandle=INVALID_MODULEHANDLE) or (GLUHandle=INVALID_MODULEHANDLE) then
      Result:=InitOpenGLFromLibrary(opengl32, glu32)
   else Result:=True;
end;

function InitOpenGLFromLibrary(const GLName, GLUName : String) : Boolean;
begin
  Result := False;
  CloseOpenGL;
  GLHandle := LoadLibrary(PChar(GLName));
  GLUHandle := LoadLibrary(PChar(GLUName));

   if (GLHandle<>INVALID_MODULEHANDLE) and (GLUHandle<>INVALID_MODULEHANDLE) then
     Result:=True
   else begin
      if GLHandle<>INVALID_MODULEHANDLE then
         FreeLibrary(Cardinal(GLHandle));
      if GLUHandle<>INVALID_MODULEHANDLE then
         FreeLibrary(Cardinal(GLUHandle));
   end;
end;

function IsOpenGLInitialized: Boolean;
begin
   Result:=(GLHandle<>INVALID_MODULEHANDLE);
end;

// compatibility routines
procedure UnloadOpenGL;
begin
  CloseOpenGL;
end;

function LoadOpenGL: Boolean;
begin
  Result := InitOpenGL;
end;

function LoadOpenGLFromLibrary(const GLName, GLUName: String): Boolean;
begin
  Result := InitOpenGLFromLibrary(GLName, GLUName);
end;

function IsOpenGLLoaded: Boolean;
begin
  Result := IsOpenGLInitialized();
end;

function IsMesaGL : Boolean;
begin
  Result := GLGetProcAddress('glResizeBuffersMESA') <> nil;
end;

function IsOpenGLVersionMet(MajorVersion, MinorVersion: Integer): Boolean;
var
  Buffer : String;
  GLMajorVersion, GLMinorVersion: Integer;
begin
  buffer:=String(glGetString(GL_VERSION));
  TrimAndSplitVersionString(buffer, GLMajorVersion, GLMinorVersion);
  Result:=IsVersionMet(MajorVersion,MinorVersion,GLMajorVersion,GLMinorVersion);
end;

initialization

  Set8087CW($133F);

finalization

  CloseOpenGL;

end.