//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//     file="glApiManager.cs"
//     Project: StgSharp
//     AuthorGroup: Nitload Space
//     Copyright (c) Nitload Space. All rights reserved.
//     
//     Permission is hereby granted, free of charge, to any person 
//     obtaining a copy of this software and associated documentation 
//     files (the “Software”), to deal in the Software without restriction, 
//     including without limitation the rights to use, copy, modify, merge,
//     publish, distribute, sublicense, and/or sell copies of the Software, 
//     and to permit persons to whom the Software is furnished to do so, 
//     subject to the following conditions:
//     
//     The above copyright notice and 
//     this permission notice shall be included in all copies 
//     or substantial portions of the Software.
//     
//     THE SOFTWARE IS PROVIDED “AS IS”, 
//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//     
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
using StgSharp.HighPerformance;
using StgSharp.Math;
using StgSharp.MVVM;
using StgSharp.MVVM;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;

namespace StgSharp.Graphics.OpenGL
{
    public static partial class glManager
    {

        private const int glExtension = 0x1f03;
        private const int glVersion = 0x1f02;

        private static readonly string[] glBranch = {
                "OpenGL ES-CM ",
                "OpenGL ES-CL ",
                "OpenGL ES ",
                "OpenGL SC "
            };

        private static string glExtensionList;

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

        /// <summary>
        ///   Get the function pointer of given OpenGL api _label
        /// </summary>
        /// <param _label="name">
        ///   ContextName of the OpenGL api
        /// </param>
        /// <returns>
        ///   The funtion pointer of the api in stream of <see cref="IntPtr" />
        /// </returns>
        public static IntPtr LoadGLfunc( string name )
        {
            IntPtr ret = InternalIO.glfwGetProcAddress( name );
            if( ret == default )
            {
                InternalIO.InternalAppendLog(
                    $"Cannot load OpenGL api called {name}, this api may not exist or supported." );
                return ret;
            }
            return ret;
        }

        /// <summary>
        ///   Load all supported OpenGL APIs and bind them to given <see cref="ViewPort" />.
        /// </summary>
        /// <param _label="contextHandle">
        ///   The handle to current OpenGL viewPortDisplay
        /// </param>
        public static unsafe void LoadOpenGLApiTo( IntPtr contextHandle )
        {
            OpenglContext* context = ( OpenglContext* )contextHandle;
            delegate*<string, IntPtr> loader = &InternalIO.glfwGetProcAddress;
            if( ( IntPtr )context->glGetString != IntPtr.Zero ) {
                return;
            }
            IntPtr proc = loader( "glGetString" );
            if( proc == IntPtr.Zero )
            {
                #if DEBUG
                Console.WriteLine( "Cannot load GL." );
                #endif
                throw new Exception( "Cannot load gl" );
            }
            context->glGetString = ( delegate*<uint, IntPtr> )proc;

            string coreVersion;
            if( context->glGetString( glVersion ) == IntPtr.Zero ) {
                InternalIO.InternalWriteLog( "Failed to call glGetString", LogType.Error );
            }
            coreVersion = Marshal.PtrToStringAnsi( context->glGetString( glVersion ) ) ??
                string.Empty;

            foreach( string branch in glBranch )
            {
                if( coreVersion.Contains( branch ) ) {
                    coreVersion.Replace( branch, string.Empty );
                }
            }
            string[] versionSep = coreVersion!.Split( '.' );
            int majorVersion = int.Parse( versionSep[ 0 ] );
            int minorVersion = int.Parse( versionSep[ 1 ] );
            CheckCoreVersion( majorVersion, minorVersion );

            try
            {
                #region load_core_gl

                LoadGLcore10( context, loader );
                LoadGLcore11( context, loader );
                LoadGLcore12( context, loader );
                LoadGLcore13( context, loader );
                LoadGLcore14( context, loader );
                LoadGLcore15( context, loader );
                LoadGLcore20( context, loader );
                LoadGLcore21( context, loader );
                LoadGLcore30( context, loader );
                LoadGLcore31( context, loader );
                LoadGLcore32( context, loader );
                LoadGLcore33( context, loader );
                LoadGLcore40( context, loader );
                LoadGLcore41( context, loader );
                LoadGLcore42( context, loader );
                LoadGLcore43( context, loader );
                LoadGLcore44( context, loader );
                LoadGLcore45( context, loader );
                LoadGLcore46( context, loader );

                #endregion load_core_gl
            }
            catch( Exception ex )
            {
                if( ex.Message != "Final Version" ) {
                    throw;
                }
            }

            uint code = context->glGetError();
            if( code != 0 )
            {
                Console.WriteLine(code);
                throw new GlExecutionException( code );
            }

            int extensionCount;
            context->glGetIntegerv( glConst.NUM_EXTENSIONS, &extensionCount );
            if( extensionCount == 0 )
            {
                InternalIO.InternalWriteLog(
                    "No supported OpenGL extensions are found.", LogType.Info );
                return;
            }

            List<string> extensions = new List<string>();

            for( uint i = 0; i < extensionCount; i++ )
            {
                byte* strPtr = context->glGetStringi( glConst.EXTENSIONS, i );
                extensions.Add( Marshal.PtrToStringAnsi( ( IntPtr )strPtr ) );
            }

            InternalIO.InternalWriteLog(
                $"{$"Find OpenGL extensions:"}{Environment.NewLine}{($"{string.Join(';', extensions)}")}",
                LogType.Info );

            #region checkGLextensions

            if( extensions.Contains( "gl_4DFX_multisample" ) )
            {
                _4DFX_multisample = true;
                extensions.Remove( "gl_4DFX_multisample" );
            }
            if( extensions.Contains( "gl_3DFX_tbuffer" ) )
            {
                _3DFX_tbuffer = true;
                extensions.Remove( "gl_3DFX_tbuffer" );
            }
            if( extensions.Contains( "gl_3DFX_texture_compression_FXT1" ) )
            {
                _3DFX_texture_compression_FXT1 = true;
                extensions.Remove( "gl_3DFX_texture_compression_FXT1" );
            }
            if( extensions.Contains( "gl_AMD_blend_minmax_factor" ) )
            {
                AMD_blend_minmax_factor = true;
                extensions.Remove( "glAMD_blend_minmax_factor" );
            }
            if( extensions.Contains( "gl_AMD_conservative_depth" ) )
            {
                AMD_conservative_depth = true;
                extensions.Remove( "glAMD_conservative_depth" );
            }
            if( extensions.Contains( "gl_AMD_debug_output" ) )
            {
                AMD_debug_output = true;
                extensions.Remove( "glAMD_debug_output" );
            }
            if( extensions.Contains( "gl_AMD_depth_clamp_separate" ) )
            {
                AMD_depth_clamp_separate = true;
                extensions.Remove( "glAMD_depth_clamp_separate" );
            }
            if( extensions.Contains( "gl_AMD_draw_buffers_blend" ) )
            {
                AMD_draw_buffers_blend = true;
                extensions.Remove( "glAMD_draw_buffers_blend" );
            }
            if( extensions.Contains( "gl_AMD_framebuffer_multisample_advanced" ) )
            {
                AMD_framebuffer_multisample_advanced = true;
                extensions.Remove( "glAMD_framebuffer_multisample_advanced" );
            }
            if( extensions.Contains( "gl_AMD_framebuffer_sample_positions" ) )
            {
                AMD_framebuffer_sample_positions = true;
                extensions.Remove( "glAMD_framebuffer_sample_positions" );
            }
            if( extensions.Contains( "gl_AMD_gcn_shader" ) )
            {
                AMD_gcn_shader = true;
                extensions.Remove( "glAMD_gcn_shader" );
            }
            if( extensions.Contains( "gl_AMD_gpu_shader_half_float" ) )
            {
                AMD_gpu_shader_half_float = true;
                extensions.Remove( "glAMD_gpu_shader_half_float" );
            }
            if( extensions.Contains( "gl_AMD_gpu_shader_int16" ) )
            {
                AMD_gpu_shader_int16 = true;
                extensions.Remove( "glAMD_gpu_shader_int16" );
            }
            if( extensions.Contains( "gl_AMD_gpu_shader_int64" ) )
            {
                AMD_gpu_shader_int64 = true;
                extensions.Remove( "glAMD_gpu_shader_int64" );
            }
            if( extensions.Contains( "gl_AMD_interleaved_elements" ) )
            {
                AMD_interleaved_elements = true;
                extensions.Remove( "glAMD_interleaved_elements" );
            }
            if( extensions.Contains( "gl_AMD_multi_draw_indirect" ) )
            {
                AMD_multi_draw_indirect = true;
                extensions.Remove( "glAMD_multi_draw_indirect" );
            }
            if( extensions.Contains( "gl_AMD_name_gen_delete" ) )
            {
                AMD_name_gen_delete = true;
                extensions.Remove( "glAMD_name_gen_delete" );
            }
            if( extensions.Contains( "gl_AMD_occlusion_query_event" ) )
            {
                AMD_occlusion_query_event = true;
                extensions.Remove( "glAMD_occlusion_query_event" );
            }
            if( extensions.Contains( "gl_AMD_performance_monitor" ) )
            {
                AMD_performance_monitor = true;
                extensions.Remove( "glAMD_performance_monitor" );
            }
            if( extensions.Contains( "gl_AMD_pinned_memory" ) )
            {
                AMD_pinned_memory = true;
                extensions.Remove( "glAMD_pinned_memory" );
            }
            if( extensions.Contains( "gl_AMD_query_buffer_object" ) )
            {
                AMD_query_buffer_object = true;
                extensions.Remove( "glAMD_query_buffer_object" );
            }
            if( extensions.Contains( "gl_AMD_sample_positions" ) )
            {
                AMD_sample_positions = true;
                extensions.Remove( "glAMD_sample_positions" );
            }
            if( extensions.Contains( "gl_AMD_seamless_cubemap_per_texture" ) )
            {
                AMD_seamless_cubemap_per_texture = true;
                extensions.Remove( "glAMD_seamless_cubemap_per_texture" );
            }
            if( extensions.Contains( "gl_AMD_shader_atomic_counter_ops" ) )
            {
                AMD_shader_atomic_counter_ops = true;
                extensions.Remove( "glAMD_shader_atomic_counter_ops" );
            }
            if( extensions.Contains( "gl_AMD_shader_ballot" ) )
            {
                AMD_shader_ballot = true;
                extensions.Remove( "glAMD_shader_ballot" );
            }
            if( extensions.Contains( "gl_AMD_shader_explicit_vertex_parameter" ) )
            {
                AMD_shader_explicit_vertex_parameter = true;
                extensions.Remove( "glAMD_shader_explicit_vertex_parameter" );
            }
            if( extensions.Contains( "gl_AMD_shader_gpu_shader_half_float_fetch" ) )
            {
                AMD_shader_gpu_shader_half_float_fetch = true;
                extensions.Remove( "glAMD_shader_gpu_shader_half_float_fetch" );
            }
            if( extensions.Contains( "gl_AMD_shader_image_load_store_lod" ) )
            {
                AMD_shader_image_load_store_lod = true;
                extensions.Remove( "glAMD_shader_image_load_store_lod" );
            }
            if( extensions.Contains( "gl_AMD_shader_stencil_export" ) )
            {
                AMD_shader_stencil_export = true;
                extensions.Remove( "glAMD_shader_stencil_export" );
            }
            if( extensions.Contains( "gl_AMD_shader_trinary_minmax" ) )
            {
                AMD_shader_trinary_minmax = true;
                extensions.Remove( "glAMD_shader_trinary_minmax" );
            }
            if( extensions.Contains( "gl_AMD_sparse_texture" ) )
            {
                AMD_sparse_texture = true;
                extensions.Remove( "glAMD_sparse_texture" );
            }
            if( extensions.Contains( "gl_AMD_stencil_operation_extended" ) )
            {
                AMD_stencil_operation_extended = true;
                extensions.Remove( "glAMD_stencil_operation_extended" );
            }
            if( extensions.Contains( "gl_AMD_texture_gather_bias_lod" ) )
            {
                AMD_texture_gather_bias_lod = true;
                extensions.Remove( "glAMD_texture_gather_bias_lod" );
            }
            if( extensions.Contains( "gl_AMD_texture_texture4" ) )
            {
                AMD_texture_texture4 = true;
                extensions.Remove( "glAMD_texture_texture4" );
            }
            if( extensions.Contains( "gl_AMD_transform_feedback3_lines_triangles" ) )
            {
                AMD_transform_feedback3_lines_triangles = true;
                extensions.Remove( "glAMD_transform_feedback3_lines_triangles" );
            }
            if( extensions.Contains( "gl_AMD_transform_feedback4" ) )
            {
                AMD_transform_feedback4 = true;
                extensions.Remove( "glAMD_transform_feedback4" );
            }
            if( extensions.Contains( "gl_AMD_vertex_shader_layer" ) )
            {
                AMD_vertex_shader_layer = true;
                extensions.Remove( "glAMD_vertex_shader_layer" );
            }
            if( extensions.Contains( "gl_AMD_vertex_shader_tessellator" ) )
            {
                AMD_vertex_shader_tessellator = true;
                extensions.Remove( "glAMD_vertex_shader_tessellator" );
            }
            if( extensions.Contains( "gl_AMD_vertex_shader_viewport_index" ) )
            {
                AMD_vertex_shader_viewport_index = true;
                extensions.Remove( "glAMD_vertex_shader_viewport_index" );
            }
            if( extensions.Contains( "gl_APPLE_aux_depth_stencil" ) )
            {
                APPLE_aux_depth_stencil = true;
                extensions.Remove( "glAPPLE_aux_depth_stencil" );
            }
            if( extensions.Contains( "gl_APPLE_client_storage" ) )
            {
                APPLE_client_storage = true;
                extensions.Remove( "glAPPLE_client_storage" );
            }
            if( extensions.Contains( "gl_APPLE_element_array" ) )
            {
                APPLE_element_array = true;
                extensions.Remove( "glAPPLE_element_array" );
            }
            if( extensions.Contains( "gl_APPLE_fence" ) )
            {
                APPLE_fence = true;
                extensions.Remove( "glAPPLE_fence" );
            }
            if( extensions.Contains( "gl_APPLE_float_pixels" ) )
            {
                APPLE_float_pixels = true;
                extensions.Remove( "glAPPLE_float_pixels" );
            }
            if( extensions.Contains( "gl_APPLE_flush_buffer_range" ) )
            {
                APPLE_flush_buffer_range = true;
                extensions.Remove( "glAPPLE_flush_buffer_range" );
            }
            if( extensions.Contains( "gl_APPLE_object_purgeable" ) )
            {
                APPLE_object_purgeable = true;
                extensions.Remove( "glAPPLE_object_purgeable" );
            }
            if( extensions.Contains( "gl_APPLE_rgb_422" ) )
            {
                APPLE_rgb_422 = true;
                extensions.Remove( "glAPPLE_rgb_422" );
            }
            if( extensions.Contains( "gl_APPLE_row_bytes" ) )
            {
                APPLE_row_bytes = true;
                extensions.Remove( "glAPPLE_row_bytes" );
            }
            if( extensions.Contains( "gl_APPLE_specular_vector" ) )
            {
                APPLE_specular_vector = true;
                extensions.Remove( "glAPPLE_specular_vector" );
            }
            if( extensions.Contains( "gl_APPLE_texture_range" ) )
            {
                APPLE_texture_range = true;
                extensions.Remove( "glAPPLE_texture_range" );
            }
            if( extensions.Contains( "gl_APPLE_transform_hint" ) )
            {
                APPLE_transform_hint = true;
                extensions.Remove( "glAPPLE_transform_hint" );
            }
            if( extensions.Contains( "gl_APPLE_vertex_array_object" ) )
            {
                APPLE_vertex_array_object = true;
                extensions.Remove( "glAPPLE_vertex_array_object" );
            }
            if( extensions.Contains( "gl_APPLE_vertex_array_range" ) )
            {
                APPLE_vertex_array_range = true;
                extensions.Remove( "glAPPLE_vertex_array_range" );
            }
            if( extensions.Contains( "gl_APPLE_vertex_program_evaluators" ) )
            {
                APPLE_vertex_program_evaluators = true;
                extensions.Remove( "glAPPLE_vertex_program_evaluators" );
            }
            if( extensions.Contains( "gl_APPLE_ycbcr_422" ) )
            {
                APPLE_ycbcr_422 = true;
                extensions.Remove( "glAPPLE_ycbcr_422" );
            }
            if( extensions.Contains( "gl_ARB_ES2_compatibility" ) )
            {
                ARB_ES2_compatibility = true;
                extensions.Remove( "glARB_ES2_compatibility" );
            }
            if( extensions.Contains( "gl_ARB_ES3_1_compatibility" ) )
            {
                ARB_ES3_1_compatibility = true;
                extensions.Remove( "glARB_ES3_1_compatibility" );
            }
            if( extensions.Contains( "gl_ARB_ES3_2_compatibility" ) )
            {
                ARB_ES3_2_compatibility = true;
                extensions.Remove( "glARB_ES3_2_compatibility" );
            }
            if( extensions.Contains( "gl_ARB_ES3_compatibility" ) )
            {
                ARB_ES3_compatibility = true;
                extensions.Remove( "glARB_ES3_compatibility" );
            }
            if( extensions.Contains( "gl_ARB_arrays_of_arrays" ) )
            {
                ARB_arrays_of_arrays = true;
                extensions.Remove( "glARB_arrays_of_arrays" );
            }
            if( extensions.Contains( "gl_ARB_base_instance" ) )
            {
                ARB_base_instance = true;
                extensions.Remove( "glARB_base_instance" );
            }
            if( extensions.Contains( "gl_ARB_bindless_texture" ) )
            {
                ARB_bindless_texture = true;
                extensions.Remove( "glARB_bindless_texture" );
            }
            if( extensions.Contains( "gl_ARB_blend_func_extended" ) )
            {
                ARB_blend_func_extended = true;
                extensions.Remove( "glARB_blend_func_extended" );
            }
            if( extensions.Contains( "gl_ARB_buffer_storage" ) )
            {
                ARB_buffer_storage = true;
                extensions.Remove( "glARB_buffer_storage" );
            }
            if( extensions.Contains( "gl_ARB_cl_event" ) )
            {
                ARB_cl_event = true;
                extensions.Remove( "glARB_cl_event" );
            }
            if( extensions.Contains( "gl_ARB_clear_buffer_object" ) )
            {
                ARB_clear_buffer_object = true;
                extensions.Remove( "glARB_clear_buffer_object" );
            }
            if( extensions.Contains( "gl_ARB_clear_texture" ) )
            {
                ARB_clear_texture = true;
                extensions.Remove( "glARB_clear_texture" );
            }
            if( extensions.Contains( "gl_ARB_clip_control" ) )
            {
                ARB_clip_control = true;
                extensions.Remove( "glARB_clip_control" );
            }
            if( extensions.Contains( "gl_ARB_color_buffer_float" ) )
            {
                ARB_color_buffer_float = true;
                extensions.Remove( "glARB_color_buffer_float" );
            }
            if( extensions.Contains( "gl_ARB_compatibility" ) )
            {
                ARB_compatibility = true;
                extensions.Remove( "glARB_compatibility" );
            }
            if( extensions.Contains( "gl_ARB_compressed_texture_pixel_storage" ) )
            {
                ARB_compressed_texture_pixel_storage = true;
                extensions.Remove( "glARB_compressed_texture_pixel_storage" );
            }
            if( extensions.Contains( "gl_ARB_compute_shader" ) )
            {
                ARB_compute_shader = true;
                extensions.Remove( "glARB_compute_shader" );
            }
            if( extensions.Contains( "gl_ARB_compute_variable_group_size" ) )
            {
                ARB_compute_variable_group_size = true;
                extensions.Remove( "glARB_compute_variable_group_size" );
            }
            if( extensions.Contains( "gl_ARB_conditional_render_inverted" ) )
            {
                ARB_conditional_render_inverted = true;
                extensions.Remove( "glARB_conditional_render_inverted" );
            }
            if( extensions.Contains( "gl_ARB_conservative_depth" ) )
            {
                ARB_conservative_depth = true;
                extensions.Remove( "glARB_conservative_depth" );
            }
            if( extensions.Contains( "gl_ARB_copy_buffer" ) )
            {
                ARB_copy_buffer = true;
                extensions.Remove( "glARB_copy_buffer" );
            }
            if( extensions.Contains( "gl_ARB_copy_image" ) )
            {
                ARB_copy_image = true;
                extensions.Remove( "glARB_copy_image" );
            }
            if( extensions.Contains( "gl_ARB_cull_distance" ) )
            {
                ARB_cull_distance = true;
                extensions.Remove( "glARB_cull_distance" );
            }
            if( extensions.Contains( "gl_ARB_debug_output" ) )
            {
                ARB_debug_output = true;
                extensions.Remove( "glARB_debug_output" );
            }
            if( extensions.Contains( "gl_ARB_depth_buffer_float" ) )
            {
                ARB_depth_buffer_float = true;
                extensions.Remove( "glARB_depth_buffer_float" );
            }
            if( extensions.Contains( "gl_ARB_depth_clamp" ) )
            {
                ARB_depth_clamp = true;
                extensions.Remove( "glARB_depth_clamp" );
            }
            if( extensions.Contains( "gl_ARB_depth_texture" ) )
            {
                ARB_depth_texture = true;
                extensions.Remove( "glARB_depth_texture" );
            }
            if( extensions.Contains( "gl_ARB_derivative_control" ) )
            {
                ARB_derivative_control = true;
                extensions.Remove( "glARB_derivative_control" );
            }
            if( extensions.Contains( "gl_ARB_direct_state_access" ) )
            {
                ARB_direct_state_access = true;
                extensions.Remove( "glARB_direct_state_access" );
            }
            if( extensions.Contains( "gl_ARB_draw_buffers" ) )
            {
                ARB_draw_buffers = true;
                extensions.Remove( "glARB_draw_buffers" );
            }
            if( extensions.Contains( "gl_ARB_draw_buffers_blend" ) )
            {
                ARB_draw_buffers_blend = true;
                extensions.Remove( "glARB_draw_buffers_blend" );
            }
            if( extensions.Contains( "gl_ARB_draw_elements_base_vertex" ) )
            {
                ARB_draw_elements_base_vertex = true;
                extensions.Remove( "glARB_draw_elements_base_vertex" );
            }
            if( extensions.Contains( "gl_ARB_draw_indirect" ) )
            {
                ARB_draw_indirect = true;
                extensions.Remove( "glARB_draw_indirect" );
            }
            if( extensions.Contains( "gl_ARB_draw_instanced" ) )
            {
                ARB_draw_instanced = true;
                extensions.Remove( "glARB_draw_instanced" );
            }
            if( extensions.Contains( "gl_ARB_enhanced_layouts" ) )
            {
                ARB_enhanced_layouts = true;
                extensions.Remove( "glARB_enhanced_layouts" );
            }
            if( extensions.Contains( "gl_ARB_explicit_attrib_location" ) )
            {
                ARB_explicit_attrib_location = true;
                extensions.Remove( "glARB_explicit_attrib_location" );
            }
            if( extensions.Contains( "gl_ARB_explicit_uniform_location" ) )
            {
                ARB_explicit_uniform_location = true;
                extensions.Remove( "glARB_explicit_uniform_location" );
            }
            if( extensions.Contains( "gl_ARB_fragment_coord_conventions" ) )
            {
                ARB_fragment_coord_conventions = true;
                extensions.Remove( "glARB_fragment_coord_conventions" );
            }
            if( extensions.Contains( "gl_ARB_fragment_layer_viewport" ) )
            {
                ARB_fragment_layer_viewport = true;
                extensions.Remove( "glARB_fragment_layer_viewport" );
            }
            if( extensions.Contains( "gl_ARB_fragment_program" ) )
            {
                ARB_fragment_program = true;
                extensions.Remove( "glARB_fragment_program" );
            }
            if( extensions.Contains( "gl_ARB_fragment_program_shadow" ) )
            {
                ARB_fragment_program_shadow = true;
                extensions.Remove( "glARB_fragment_program_shadow" );
            }
            if( extensions.Contains( "gl_ARB_fragment_shader" ) )
            {
                ARB_fragment_shader = true;
                extensions.Remove( "glARB_fragment_shader" );
            }
            if( extensions.Contains( "gl_ARB_fragment_shader_interlock" ) )
            {
                ARB_fragment_shader_interlock = true;
                extensions.Remove( "glARB_fragment_shader_interlock" );
            }
            if( extensions.Contains( "gl_ARB_framebuffer_no_attachments" ) )
            {
                ARB_framebuffer_no_attachments = true;
                extensions.Remove( "glARB_framebuffer_no_attachments" );
            }
            if( extensions.Contains( "gl_ARB_framebuffer_object" ) )
            {
                ARB_framebuffer_object = true;
                extensions.Remove( "glARB_framebuffer_object" );
            }
            if( extensions.Contains( "gl_ARB_framebuffer_sRGB" ) )
            {
                ARB_framebuffer_sRGB = true;
                extensions.Remove( "glARB_framebuffer_sRGB" );
            }
            if( extensions.Contains( "gl_ARB_geometry_shader4" ) )
            {
                ARB_geometry_shader4 = true;
                extensions.Remove( "glARB_geometry_shader4" );
            }
            if( extensions.Contains( "gl_ARB_get_program_binary" ) )
            {
                ARB_get_program_binary = true;
                extensions.Remove( "glARB_get_program_binary" );
            }
            if( extensions.Contains( "gl_ARB_get_texture_sub_image" ) )
            {
                ARB_get_texture_sub_image = true;
                extensions.Remove( "glARB_get_texture_sub_image" );
            }
            if( extensions.Contains( "gl_ARB_gl_spirv" ) )
            {
                ARB_gl_spirv = true;
                extensions.Remove( "glARB_gl_spirv" );
            }
            if( extensions.Contains( "gl_ARB_gpu_shader5" ) )
            {
                ARB_gpu_shader5 = true;
                extensions.Remove( "glARB_gpu_shader5" );
            }
            if( extensions.Contains( "gl_ARB_gpu_shader_fp64" ) )
            {
                ARB_gpu_shader_fp64 = true;
                extensions.Remove( "glARB_gpu_shader_fp64" );
            }
            if( extensions.Contains( "gl_ARB_gpu_shader_int64" ) )
            {
                ARB_gpu_shader_int64 = true;
                extensions.Remove( "glARB_gpu_shader_int64" );
            }
            if( extensions.Contains( "gl_ARB_half_float_pixel" ) )
            {
                ARB_half_float_pixel = true;
                extensions.Remove( "glARB_half_float_pixel" );
            }
            if( extensions.Contains( "gl_ARB_half_float_vertex" ) )
            {
                ARB_half_float_vertex = true;
                extensions.Remove( "glARB_half_float_vertex" );
            }
            if( extensions.Contains( "gl_ARB_imaging" ) )
            {
                ARB_imaging = true;
                extensions.Remove( "glARB_imaging" );
            }
            if( extensions.Contains( "gl_ARB_indirect_parameters" ) )
            {
                ARB_indirect_parameters = true;
                extensions.Remove( "glARB_indirect_parameters" );
            }
            if( extensions.Contains( "gl_ARB_instanced_arrays" ) )
            {
                ARB_instanced_arrays = true;
                extensions.Remove( "glARB_instanced_arrays" );
            }
            if( extensions.Contains( "gl_ARB_internalformat_query" ) )
            {
                ARB_internalformat_query = true;
                extensions.Remove( "glARB_internalformat_query" );
            }
            if( extensions.Contains( "gl_ARB_internalformat_query2" ) )
            {
                ARB_internalformat_query2 = true;
                extensions.Remove( "glARB_internalformat_query2" );
            }
            if( extensions.Contains( "gl_ARB_invalidate_subdata" ) )
            {
                ARB_invalidate_subdata = true;
                extensions.Remove( "glARB_invalidate_subdata" );
            }
            if( extensions.Contains( "gl_ARB_map_buffer_alignment" ) )
            {
                ARB_map_buffer_alignment = true;
                extensions.Remove( "glARB_map_buffer_alignment" );
            }
            if( extensions.Contains( "gl_ARB_map_buffer_range" ) )
            {
                ARB_map_buffer_range = true;
                extensions.Remove( "glARB_map_buffer_range" );
            }
            if( extensions.Contains( "gl_ARB_matrix_palette" ) )
            {
                ARB_matrix_palette = true;
                extensions.Remove( "glARB_matrix_palette" );
            }
            if( extensions.Contains( "gl_ARB_multi_bind" ) )
            {
                ARB_multi_bind = true;
                extensions.Remove( "glARB_multi_bind" );
            }
            if( extensions.Contains( "gl_ARB_multi_draw_indirect" ) )
            {
                ARB_multi_draw_indirect = true;
                extensions.Remove( "glARB_multi_draw_indirect" );
            }
            if( extensions.Contains( "gl_ARB_multisample" ) )
            {
                ARB_multisample = true;
                extensions.Remove( "glARB_multisample" );
            }
            if( extensions.Contains( "gl_ARB_multitexture" ) )
            {
                ARB_multitexture = true;
                extensions.Remove( "glARB_multitexture" );
            }
            if( extensions.Contains( "gl_ARB_occlusion_query" ) )
            {
                ARB_occlusion_query = true;
                extensions.Remove( "glARB_occlusion_query" );
            }
            if( extensions.Contains( "gl_ARB_occlusion_query2" ) )
            {
                ARB_occlusion_query2 = true;
                extensions.Remove( "glARB_occlusion_query2" );
            }
            if( extensions.Contains( "gl_ARB_parallel_shader_compile" ) )
            {
                ARB_parallel_shader_compile = true;
                extensions.Remove( "glARB_parallel_shader_compile" );
            }
            if( extensions.Contains( "gl_ARB_pipeline_statistics_query" ) )
            {
                ARB_pipeline_statistics_query = true;
                extensions.Remove( "glARB_pipeline_statistics_query" );
            }
            if( extensions.Contains( "gl_ARB_pixel_buffer_object" ) )
            {
                ARB_pixel_buffer_object = true;
                extensions.Remove( "glARB_pixel_buffer_object" );
            }
            if( extensions.Contains( "gl_ARB_point_parameters" ) )
            {
                ARB_point_parameters = true;
                extensions.Remove( "glARB_point_parameters" );
            }
            if( extensions.Contains( "gl_ARB_point_sprite" ) )
            {
                ARB_point_sprite = true;
                extensions.Remove( "glARB_point_sprite" );
            }
            if( extensions.Contains( "gl_ARB_polygon_offset_clamp" ) )
            {
                ARB_polygon_offset_clamp = true;
                extensions.Remove( "glARB_polygon_offset_clamp" );
            }
            if( extensions.Contains( "gl_ARB_post_depth_coverage" ) )
            {
                ARB_post_depth_coverage = true;
                extensions.Remove( "glARB_post_depth_coverage" );
            }
            if( extensions.Contains( "gl_ARB_program_interface_query" ) )
            {
                ARB_program_interface_query = true;
                extensions.Remove( "glARB_program_interface_query" );
            }
            if( extensions.Contains( "gl_ARB_provoking_vertex" ) )
            {
                ARB_provoking_vertex = true;
                extensions.Remove( "glARB_provoking_vertex" );
            }
            if( extensions.Contains( "gl_ARB_query_buffer_object" ) )
            {
                ARB_query_buffer_object = true;
                extensions.Remove( "glARB_query_buffer_object" );
            }
            if( extensions.Contains( "gl_ARB_robust_buffer_access_behavior" ) )
            {
                ARB_robust_buffer_access_behavior = true;
                extensions.Remove( "glARB_robust_buffer_access_behavior" );
            }
            if( extensions.Contains( "gl_ARB_robustness" ) )
            {
                ARB_robustness = true;
                extensions.Remove( "glARB_robustness" );
            }
            if( extensions.Contains( "gl_ARB_robustness_isolation" ) )
            {
                ARB_robustness_isolation = true;
                extensions.Remove( "glARB_robustness_isolation" );
            }
            if( extensions.Contains( "gl_ARB_sample_locations" ) )
            {
                ARB_sample_locations = true;
                extensions.Remove( "glARB_sample_locations" );
            }
            if( extensions.Contains( "gl_ARB_sample_shading" ) )
            {
                ARB_sample_shading = true;
                extensions.Remove( "glARB_sample_shading" );
            }
            if( extensions.Contains( "gl_ARB_sampler_objects" ) )
            {
                ARB_sampler_objects = true;
                extensions.Remove( "glARB_sampler_objects" );
            }
            if( extensions.Contains( "gl_ARB_seamless_cube_map" ) )
            {
                ARB_seamless_cube_map = true;
                extensions.Remove( "glARB_seamless_cube_map" );
            }
            if( extensions.Contains( "gl_ARB_seamless_cubemap_per_texture" ) )
            {
                ARB_seamless_cubemap_per_texture = true;
                extensions.Remove( "glARB_seamless_cubemap_per_texture" );
            }
            if( extensions.Contains( "gl_ARB_separate_shader_objects" ) )
            {
                ARB_separate_shader_objects = true;
                extensions.Remove( "glARB_separate_shader_objects" );
            }
            if( extensions.Contains( "gl_ARB_shader_atomic_counter_ops" ) )
            {
                ARB_shader_atomic_counter_ops = true;
                extensions.Remove( "glARB_shader_atomic_counter_ops" );
            }
            if( extensions.Contains( "gl_ARB_shader_atomic_counters" ) )
            {
                ARB_shader_atomic_counters = true;
                extensions.Remove( "glARB_shader_atomic_counters" );
            }
            if( extensions.Contains( "gl_ARB_shader_ballot" ) )
            {
                ARB_shader_ballot = true;
                extensions.Remove( "glARB_shader_ballot" );
            }
            if( extensions.Contains( "gl_ARB_shader_bit_encoding" ) )
            {
                ARB_shader_bit_encoding = true;
                extensions.Remove( "glARB_shader_bit_encoding" );
            }
            if( extensions.Contains( "gl_ARB_shader_clock" ) )
            {
                ARB_shader_clock = true;
                extensions.Remove( "glARB_shader_clock" );
            }
            if( extensions.Contains( "gl_ARB_shader_draw_parameters" ) )
            {
                ARB_shader_draw_parameters = true;
                extensions.Remove( "glARB_shader_draw_parameters" );
            }
            if( extensions.Contains( "gl_ARB_shader_group_vote" ) )
            {
                ARB_shader_group_vote = true;
                extensions.Remove( "glARB_shader_group_vote" );
            }
            if( extensions.Contains( "gl_ARB_shader_image_load_store" ) )
            {
                ARB_shader_image_load_store = true;
                extensions.Remove( "glARB_shader_image_load_store" );
            }
            if( extensions.Contains( "gl_ARB_shader_image_size" ) )
            {
                ARB_shader_image_size = true;
                extensions.Remove( "glARB_shader_image_size" );
            }
            if( extensions.Contains( "gl_ARB_shader_objects" ) )
            {
                ARB_shader_objects = true;
                extensions.Remove( "glARB_shader_objects" );
            }
            if( extensions.Contains( "gl_ARB_shader_precision" ) )
            {
                ARB_shader_precision = true;
                extensions.Remove( "glARB_shader_precision" );
            }
            if( extensions.Contains( "gl_ARB_shader_stencil_export" ) )
            {
                ARB_shader_stencil_export = true;
                extensions.Remove( "glARB_shader_stencil_export" );
            }
            if( extensions.Contains( "gl_ARB_shader_storage_buffer_object" ) )
            {
                ARB_shader_storage_buffer_object = true;
                extensions.Remove( "glARB_shader_storage_buffer_object" );
            }
            if( extensions.Contains( "gl_ARB_shader_subroutine" ) )
            {
                ARB_shader_subroutine = true;
                extensions.Remove( "glARB_shader_subroutine" );
            }
            if( extensions.Contains( "gl_ARB_shader_texture_image_samples" ) )
            {
                ARB_shader_texture_image_samples = true;
                extensions.Remove( "glARB_shader_texture_image_samples" );
            }
            if( extensions.Contains( "gl_ARB_shader_texture_lod" ) )
            {
                ARB_shader_texture_lod = true;
                extensions.Remove( "glARB_shader_texture_lod" );
            }
            if( extensions.Contains( "gl_ARB_shader_viewport_layer_array" ) )
            {
                ARB_shader_viewport_layer_array = true;
                extensions.Remove( "glARB_shader_viewport_layer_array" );
            }
            if( extensions.Contains( "gl_ARB_shading_language_100" ) )
            {
                ARB_shading_language_100 = true;
                extensions.Remove( "glARB_shading_language_100" );
            }
            if( extensions.Contains( "gl_ARB_shading_language_420pack" ) )
            {
                ARB_shading_language_420pack = true;
                extensions.Remove( "glARB_shading_language_420pack" );
            }
            if( extensions.Contains( "gl_ARB_shading_language_include" ) )
            {
                ARB_shading_language_include = true;
                extensions.Remove( "glARB_shading_language_include" );
            }
            if( extensions.Contains( "gl_ARB_shading_language_packing" ) )
            {
                ARB_shading_language_packing = true;
                extensions.Remove( "glARB_shading_language_packing" );
            }
            if( extensions.Contains( "gl_ARB_shadow" ) )
            {
                ARB_shadow = true;
                extensions.Remove( "glARB_shadow" );
            }
            if( extensions.Contains( "gl_ARB_shadow_ambient" ) )
            {
                ARB_shadow_ambient = true;
                extensions.Remove( "glARB_shadow_ambient" );
            }
            if( extensions.Contains( "gl_ARB_sparse_buffer" ) )
            {
                ARB_sparse_buffer = true;
                extensions.Remove( "glARB_sparse_buffer" );
            }
            if( extensions.Contains( "gl_ARB_sparse_texture" ) )
            {
                ARB_sparse_texture = true;
                extensions.Remove( "glARB_sparse_texture" );
            }
            if( extensions.Contains( "gl_ARB_sparse_texture2" ) )
            {
                ARB_sparse_texture2 = true;
                extensions.Remove( "glARB_sparse_texture2" );
            }
            if( extensions.Contains( "gl_ARB_sparse_texture_clamp" ) )
            {
                ARB_sparse_texture_clamp = true;
                extensions.Remove( "glARB_sparse_texture_clamp" );
            }
            if( extensions.Contains( "gl_ARB_spirv_extensions" ) )
            {
                ARB_spirv_extensions = true;
                extensions.Remove( "glARB_spirv_extensions" );
            }
            if( extensions.Contains( "gl_ARB_stencil_texturing" ) )
            {
                ARB_stencil_texturing = true;
                extensions.Remove( "glARB_stencil_texturing" );
            }
            if( extensions.Contains( "gl_ARB_sync" ) )
            {
                ARB_sync = true;
                extensions.Remove( "glARB_sync" );
            }
            if( extensions.Contains( "gl_ARB_tessellation_shader" ) )
            {
                ARB_tessellation_shader = true;
                extensions.Remove( "glARB_tessellation_shader" );
            }
            if( extensions.Contains( "gl_ARB_texture_barrier" ) )
            {
                ARB_texture_barrier = true;
                extensions.Remove( "glARB_texture_barrier" );
            }
            if( extensions.Contains( "gl_ARB_texture_border_clamp" ) )
            {
                ARB_texture_border_clamp = true;
                extensions.Remove( "glARB_texture_border_clamp" );
            }
            if( extensions.Contains( "gl_ARB_texture_buffer_object" ) )
            {
                ARB_texture_buffer_object = true;
                extensions.Remove( "glARB_texture_buffer_object" );
            }
            if( extensions.Contains( "gl_ARB_texture_buffer_object_rgb32" ) )
            {
                ARB_texture_buffer_object_rgb32 = true;
                extensions.Remove( "glARB_texture_buffer_object_rgb32" );
            }
            if( extensions.Contains( "gl_ARB_texture_buffer_range" ) )
            {
                ARB_texture_buffer_range = true;
                extensions.Remove( "glARB_texture_buffer_range" );
            }
            if( extensions.Contains( "gl_ARB_texture_compression" ) )
            {
                ARB_texture_compression = true;
                extensions.Remove( "glARB_texture_compression" );
            }
            if( extensions.Contains( "gl_ARB_texture_compression_bptc" ) )
            {
                ARB_texture_compression_bptc = true;
                extensions.Remove( "glARB_texture_compression_bptc" );
            }
            if( extensions.Contains( "gl_ARB_texture_compression_rgtc" ) )
            {
                ARB_texture_compression_rgtc = true;
                extensions.Remove( "glARB_texture_compression_rgtc" );
            }
            if( extensions.Contains( "gl_ARB_texture_cube_map" ) )
            {
                ARB_texture_cube_map = true;
                extensions.Remove( "glARB_texture_cube_map" );
            }
            if( extensions.Contains( "gl_ARB_texture_cube_map_array" ) )
            {
                ARB_texture_cube_map_array = true;
                extensions.Remove( "glARB_texture_cube_map_array" );
            }
            if( extensions.Contains( "gl_ARB_texture_env_add" ) )
            {
                ARB_texture_env_add = true;
                extensions.Remove( "glARB_texture_env_add" );
            }
            if( extensions.Contains( "gl_ARB_texture_env_combine" ) )
            {
                ARB_texture_env_combine = true;
                extensions.Remove( "glARB_texture_env_combine" );
            }
            if( extensions.Contains( "gl_ARB_texture_env_crossbar" ) )
            {
                ARB_texture_env_crossbar = true;
                extensions.Remove( "glARB_texture_env_crossbar" );
            }
            if( extensions.Contains( "gl_ARB_texture_env_dot3" ) )
            {
                ARB_texture_env_dot3 = true;
                extensions.Remove( "glARB_texture_env_dot3" );
            }
            if( extensions.Contains( "gl_ARB_texture_filter_anisotropic" ) )
            {
                ARB_texture_filter_anisotropic = true;
                extensions.Remove( "glARB_texture_filter_anisotropic" );
            }
            if( extensions.Contains( "gl_ARB_texture_filter_minmax" ) )
            {
                ARB_texture_filter_minmax = true;
                extensions.Remove( "glARB_texture_filter_minmax" );
            }
            if( extensions.Contains( "gl_ARB_texture_float" ) )
            {
                ARB_texture_float = true;
                extensions.Remove( "glARB_texture_float" );
            }
            if( extensions.Contains( "gl_ARB_texture_gather" ) )
            {
                ARB_texture_gather = true;
                extensions.Remove( "glARB_texture_gather" );
            }
            if( extensions.Contains( "gl_ARB_texture_mirror_clamp_to_edge" ) )
            {
                ARB_texture_mirror_clamp_to_edge = true;
                extensions.Remove( "glARB_texture_mirror_clamp_to_edge" );
            }
            if( extensions.Contains( "gl_ARB_texture_mirrored_repeat" ) )
            {
                ARB_texture_mirrored_repeat = true;
                extensions.Remove( "glARB_texture_mirrored_repeat" );
            }
            if( extensions.Contains( "gl_ARB_texture_multisample" ) )
            {
                ARB_texture_multisample = true;
                extensions.Remove( "glARB_texture_multisample" );
            }
            if( extensions.Contains( "gl_ARB_texture_non_power_of_two" ) )
            {
                ARB_texture_non_power_of_two = true;
                extensions.Remove( "glARB_texture_non_power_of_two" );
            }
            if( extensions.Contains( "gl_ARB_texture_query_levels" ) )
            {
                ARB_texture_query_levels = true;
                extensions.Remove( "glARB_texture_query_levels" );
            }
            if( extensions.Contains( "gl_ARB_texture_query_lod" ) )
            {
                ARB_texture_query_lod = true;
                extensions.Remove( "glARB_texture_query_lod" );
            }
            if( extensions.Contains( "gl_ARB_texture_rectangle" ) )
            {
                ARB_texture_rectangle = true;
                extensions.Remove( "glARB_texture_rectangle" );
            }
            if( extensions.Contains( "gl_ARB_texture_rg" ) )
            {
                ARB_texture_rg = true;
                extensions.Remove( "glARB_texture_rg" );
            }
            if( extensions.Contains( "gl_ARB_texture_rgb10_a2ui" ) )
            {
                ARB_texture_rgb10_a2ui = true;
                extensions.Remove( "glARB_texture_rgb10_a2ui" );
            }
            if( extensions.Contains( "gl_ARB_texture_stencil8" ) )
            {
                ARB_texture_stencil8 = true;
                extensions.Remove( "glARB_texture_stencil8" );
            }
            if( extensions.Contains( "gl_ARB_texture_storage" ) )
            {
                ARB_texture_storage = true;
                extensions.Remove( "glARB_texture_storage" );
            }
            if( extensions.Contains( "gl_ARB_texture_storage_multisample" ) )
            {
                ARB_texture_storage_multisample = true;
                extensions.Remove( "glARB_texture_storage_multisample" );
            }
            if( extensions.Contains( "gl_ARB_texture_swizzle" ) )
            {
                ARB_texture_swizzle = true;
                extensions.Remove( "glARB_texture_swizzle" );
            }
            if( extensions.Contains( "gl_ARB_texture_view" ) )
            {
                ARB_texture_view = true;
                extensions.Remove( "glARB_texture_view" );
            }
            if( extensions.Contains( "gl_ARB_timer_query" ) )
            {
                ARB_timer_query = true;
                extensions.Remove( "glARB_timer_query" );
            }
            if( extensions.Contains( "gl_ARB_transform_feedback2" ) )
            {
                ARB_transform_feedback2 = true;
                extensions.Remove( "glARB_transform_feedback2" );
            }
            if( extensions.Contains( "gl_ARB_transform_feedback3" ) )
            {
                ARB_transform_feedback3 = true;
                extensions.Remove( "glARB_transform_feedback3" );
            }
            if( extensions.Contains( "gl_ARB_transform_feedback_instanced" ) )
            {
                ARB_transform_feedback_instanced = true;
                extensions.Remove( "glARB_transform_feedback_instanced" );
            }
            if( extensions.Contains( "gl_ARB_transform_feedback_overflow_query" ) )
            {
                ARB_transform_feedback_overflow_query = true;
                extensions.Remove( "glARB_transform_feedback_overflow_query" );
            }
            if( extensions.Contains( "gl_ARB_transpose_matrix" ) )
            {
                ARB_transpose_matrix = true;
                extensions.Remove( "glARB_transpose_matrix" );
            }
            if( extensions.Contains( "gl_ARB_uniform_buffer_object" ) )
            {
                ARB_uniform_buffer_object = true;
                extensions.Remove( "glARB_uniform_buffer_object" );
            }
            if( extensions.Contains( "gl_ARB_vertex_array_bgra" ) )
            {
                ARB_vertex_array_bgra = true;
                extensions.Remove( "glARB_vertex_array_bgra" );
            }
            if( extensions.Contains( "gl_ARB_vertex_array_object" ) )
            {
                ARB_vertex_array_object = true;
                extensions.Remove( "glARB_vertex_array_object" );
            }
            if( extensions.Contains( "gl_ARB_vertex_attrib_64bit" ) )
            {
                ARB_vertex_attrib_64bit = true;
                extensions.Remove( "glARB_vertex_attrib_64bit" );
            }
            if( extensions.Contains( "gl_ARB_vertex_attrib_binding" ) )
            {
                ARB_vertex_attrib_binding = true;
                extensions.Remove( "glARB_vertex_attrib_binding" );
            }
            if( extensions.Contains( "gl_ARB_vertex_blend" ) )
            {
                ARB_vertex_blend = true;
                extensions.Remove( "glARB_vertex_blend" );
            }
            if( extensions.Contains( "gl_ARB_vertex_buffer_object" ) )
            {
                ARB_vertex_buffer_object = true;
                extensions.Remove( "glARB_vertex_buffer_object" );
            }
            if( extensions.Contains( "gl_ARB_vertex_program" ) )
            {
                ARB_vertex_program = true;
                extensions.Remove( "glARB_vertex_program" );
            }
            if( extensions.Contains( "gl_ARB_vertex_shader" ) )
            {
                ARB_vertex_shader = true;
                extensions.Remove( "glARB_vertex_shader" );
            }
            if( extensions.Contains( "gl_ARB_vertex_type_10f_11f_11f_rev" ) )
            {
                ARB_vertex_type_10f_11f_11f_rev = true;
                extensions.Remove( "glARB_vertex_type_10f_11f_11f_rev" );
            }
            if( extensions.Contains( "gl_ARB_vertex_type_2_10_10_10_rev" ) )
            {
                ARB_vertex_type_2_10_10_10_rev = true;
                extensions.Remove( "glARB_vertex_type_2_10_10_10_rev" );
            }
            if( extensions.Contains( "gl_ARB_viewport_array" ) )
            {
                ARB_viewport_array = true;
                extensions.Remove( "glARB_viewport_array" );
            }
            if( extensions.Contains( "gl_ARB_window_pos" ) )
            {
                ARB_window_pos = true;
                extensions.Remove( "glARB_window_pos" );
            }
            if( extensions.Contains( "gl_ATI_draw_buffers" ) )
            {
                ATI_draw_buffers = true;
                extensions.Remove( "glATI_draw_buffers" );
            }
            if( extensions.Contains( "gl_ATI_element_array" ) )
            {
                ATI_element_array = true;
                extensions.Remove( "glATI_element_array" );
            }
            if( extensions.Contains( "gl_ATI_envmap_bumpmap" ) )
            {
                ATI_envmap_bumpmap = true;
                extensions.Remove( "glATI_envmap_bumpmap" );
            }
            if( extensions.Contains( "gl_ATI_fragment_shader" ) )
            {
                ATI_fragment_shader = true;
                extensions.Remove( "glATI_fragment_shader" );
            }
            if( extensions.Contains( "gl_ATI_map_object_buffer" ) )
            {
                ATI_map_object_buffer = true;
                extensions.Remove( "glATI_map_object_buffer" );
            }
            if( extensions.Contains( "gl_ATI_meminfo" ) )
            {
                ATI_meminfo = true;
                extensions.Remove( "glATI_meminfo" );
            }
            if( extensions.Contains( "gl_ATI_pixel_format_float" ) )
            {
                ATI_pixel_format_float = true;
                extensions.Remove( "glATI_pixel_format_float" );
            }
            if( extensions.Contains( "gl_ATI_pn_triangles" ) )
            {
                ATI_pn_triangles = true;
                extensions.Remove( "glATI_pn_triangles" );
            }
            if( extensions.Contains( "gl_ATI_separate_stencil" ) )
            {
                ATI_separate_stencil = true;
                extensions.Remove( "glATI_separate_stencil" );
            }
            if( extensions.Contains( "gl_ATI_text_fragment_shader" ) )
            {
                ATI_text_fragment_shader = true;
                extensions.Remove( "glATI_text_fragment_shader" );
            }
            if( extensions.Contains( "gl_ATI_texture_env_combine3" ) )
            {
                ATI_texture_env_combine3 = true;
                extensions.Remove( "glATI_texture_env_combine3" );
            }
            if( extensions.Contains( "gl_ATI_texture_float" ) )
            {
                ATI_texture_float = true;
                extensions.Remove( "glATI_texture_float" );
            }
            if( extensions.Contains( "gl_ATI_texture_mirror_once" ) )
            {
                ATI_texture_mirror_once = true;
                extensions.Remove( "glATI_texture_mirror_once" );
            }
            if( extensions.Contains( "gl_ATI_vertex_array_object" ) )
            {
                ATI_vertex_array_object = true;
                extensions.Remove( "glATI_vertex_array_object" );
            }
            if( extensions.Contains( "gl_ATI_vertex_attrib_array_object" ) )
            {
                ATI_vertex_attrib_array_object = true;
                extensions.Remove( "glATI_vertex_attrib_array_object" );
            }
            if( extensions.Contains( "gl_ATI_vertex_streams" ) )
            {
                ATI_vertex_streams = true;
                extensions.Remove( "glATI_vertex_streams" );
            }
            if( extensions.Contains( "gl_EXT_422_pixels" ) )
            {
                EXT_422_pixels = true;
                extensions.Remove( "glEXT_422_pixels" );
            }
            if( extensions.Contains( "gl_EXT_EGL_image_storage" ) )
            {
                EXT_EGL_image_storage = true;
                extensions.Remove( "glEXT_EGL_image_storage" );
            }
            if( extensions.Contains( "gl_EXT_EGL_sync" ) )
            {
                EXT_EGL_sync = true;
                extensions.Remove( "glEXT_EGL_sync" );
            }
            if( extensions.Contains( "gl_EXT_abgr" ) )
            {
                EXT_abgr = true;
                extensions.Remove( "glEXT_abgr" );
            }
            if( extensions.Contains( "gl_EXT_bgra" ) )
            {
                EXT_bgra = true;
                extensions.Remove( "glEXT_bgra" );
            }
            if( extensions.Contains( "gl_EXT_bindable_uniform" ) )
            {
                EXT_bindable_uniform = true;
                extensions.Remove( "glEXT_bindable_uniform" );
            }
            if( extensions.Contains( "gl_EXT_blend_color" ) )
            {
                EXT_blend_color = true;
                extensions.Remove( "glEXT_blend_color" );
            }
            if( extensions.Contains( "gl_EXT_blend_equation_separate" ) )
            {
                EXT_blend_equation_separate = true;
                extensions.Remove( "glEXT_blend_equation_separate" );
            }
            if( extensions.Contains( "gl_EXT_blend_func_separate" ) )
            {
                EXT_blend_func_separate = true;
                extensions.Remove( "glEXT_blend_func_separate" );
            }
            if( extensions.Contains( "gl_EXT_blend_logic_op" ) )
            {
                EXT_blend_logic_op = true;
                extensions.Remove( "glEXT_blend_logic_op" );
            }
            if( extensions.Contains( "gl_EXT_blend_minmax" ) )
            {
                EXT_blend_minmax = true;
                extensions.Remove( "glEXT_blend_minmax" );
            }
            if( extensions.Contains( "gl_EXT_blend_subtract" ) )
            {
                EXT_blend_subtract = true;
                extensions.Remove( "glEXT_blend_subtract" );
            }
            if( extensions.Contains( "gl_EXT_clip_volume_hint" ) )
            {
                EXT_clip_volume_hint = true;
                extensions.Remove( "glEXT_clip_volume_hint" );
            }
            if( extensions.Contains( "gl_EXT_cmyka" ) )
            {
                EXT_cmyka = true;
                extensions.Remove( "glEXT_cmyka" );
            }
            if( extensions.Contains( "gl_EXT_color_subtable" ) )
            {
                EXT_color_subtable = true;
                extensions.Remove( "glEXT_color_subtable" );
            }
            if( extensions.Contains( "gl_EXT_compiled_vertex_array" ) )
            {
                EXT_compiled_vertex_array = true;
                extensions.Remove( "glEXT_compiled_vertex_array" );
            }
            if( extensions.Contains( "gl_EXT_convolution" ) )
            {
                EXT_convolution = true;
                extensions.Remove( "glEXT_convolution" );
            }
            if( extensions.Contains( "gl_EXT_coordinate_frame" ) )
            {
                EXT_coordinate_frame = true;
                extensions.Remove( "glEXT_coordinate_frame" );
            }
            if( extensions.Contains( "gl_EXT_copy_texture" ) )
            {
                EXT_copy_texture = true;
                extensions.Remove( "glEXT_copy_texture" );
            }
            if( extensions.Contains( "gl_EXT_cull_vertex" ) )
            {
                EXT_cull_vertex = true;
                extensions.Remove( "glEXT_cull_vertex" );
            }
            if( extensions.Contains( "gl_EXT_debug_label" ) )
            {
                EXT_debug_label = true;
                extensions.Remove( "glEXT_debug_label" );
            }
            if( extensions.Contains( "gl_EXT_debug_marker" ) )
            {
                EXT_debug_marker = true;
                extensions.Remove( "glEXT_debug_marker" );
            }
            if( extensions.Contains( "gl_EXT_depth_bounds_test" ) )
            {
                EXT_depth_bounds_test = true;
                extensions.Remove( "glEXT_depth_bounds_test" );
            }
            if( extensions.Contains( "gl_EXT_direct_state_access" ) )
            {
                EXT_direct_state_access = true;
                extensions.Remove( "glEXT_direct_state_access" );
            }
            if( extensions.Contains( "gl_EXT_draw_buffers2" ) )
            {
                EXT_draw_buffers2 = true;
                extensions.Remove( "glEXT_draw_buffers2" );
            }
            if( extensions.Contains( "gl_EXT_draw_instanced" ) )
            {
                EXT_draw_instanced = true;
                extensions.Remove( "glEXT_draw_instanced" );
            }
            if( extensions.Contains( "gl_EXT_draw_range_elements" ) )
            {
                EXT_draw_range_elements = true;
                extensions.Remove( "glEXT_draw_range_elements" );
            }
            if( extensions.Contains( "gl_EXT_external_buffer" ) )
            {
                EXT_external_buffer = true;
                extensions.Remove( "glEXT_external_buffer" );
            }
            if( extensions.Contains( "gl_EXT_fog_coord" ) )
            {
                EXT_fog_coord = true;
                extensions.Remove( "glEXT_fog_coord" );
            }
            if( extensions.Contains( "gl_EXT_framebuffer_blit" ) )
            {
                EXT_framebuffer_blit = true;
                extensions.Remove( "glEXT_framebuffer_blit" );
            }
            if( extensions.Contains( "gl_EXT_framebuffer_blit_layers" ) )
            {
                EXT_framebuffer_blit_layers = true;
                extensions.Remove( "glEXT_framebuffer_blit_layers" );
            }
            if( extensions.Contains( "gl_EXT_framebuffer_multisample" ) )
            {
                EXT_framebuffer_multisample = true;
                extensions.Remove( "glEXT_framebuffer_multisample" );
            }
            if( extensions.Contains( "gl_EXT_framebuffer_multisample_blit_scaled" ) )
            {
                EXT_framebuffer_multisample_blit_scaled = true;
                extensions.Remove( "glEXT_framebuffer_multisample_blit_scaled" );
            }
            if( extensions.Contains( "gl_EXT_framebuffer_object" ) )
            {
                EXT_framebuffer_object = true;
                extensions.Remove( "glEXT_framebuffer_object" );
            }
            if( extensions.Contains( "gl_EXT_framebuffer_sRGB" ) )
            {
                EXT_framebuffer_sRGB = true;
                extensions.Remove( "glEXT_framebuffer_sRGB" );
            }
            if( extensions.Contains( "gl_EXT_geometry_shader4" ) )
            {
                EXT_geometry_shader4 = true;
                extensions.Remove( "glEXT_geometry_shader4" );
            }
            if( extensions.Contains( "gl_EXT_gpu_program_parameters" ) )
            {
                EXT_gpu_program_parameters = true;
                extensions.Remove( "glEXT_gpu_program_parameters" );
            }
            if( extensions.Contains( "gl_EXT_gpu_shader4" ) )
            {
                EXT_gpu_shader4 = true;
                extensions.Remove( "glEXT_gpu_shader4" );
            }
            if( extensions.Contains( "gl_EXT_histogram" ) )
            {
                EXT_histogram = true;
                extensions.Remove( "glEXT_histogram" );
            }
            if( extensions.Contains( "gl_EXT_index_array_formats" ) )
            {
                EXT_index_array_formats = true;
                extensions.Remove( "glEXT_index_array_formats" );
            }
            if( extensions.Contains( "gl_EXT_index_func" ) )
            {
                EXT_index_func = true;
                extensions.Remove( "glEXT_index_func" );
            }
            if( extensions.Contains( "gl_EXT_index_material" ) )
            {
                EXT_index_material = true;
                extensions.Remove( "glEXT_index_material" );
            }
            if( extensions.Contains( "gl_EXT_index_texture" ) )
            {
                EXT_index_texture = true;
                extensions.Remove( "glEXT_index_texture" );
            }
            if( extensions.Contains( "gl_EXT_light_texture" ) )
            {
                EXT_light_texture = true;
                extensions.Remove( "glEXT_light_texture" );
            }
            if( extensions.Contains( "gl_EXT_memory_object" ) )
            {
                EXT_memory_object = true;
                extensions.Remove( "glEXT_memory_object" );
            }
            if( extensions.Contains( "gl_EXT_memory_object_fd" ) )
            {
                EXT_memory_object_fd = true;
                extensions.Remove( "glEXT_memory_object_fd" );
            }
            if( extensions.Contains( "gl_EXT_memory_object_win32" ) )
            {
                EXT_memory_object_win32 = true;
                extensions.Remove( "glEXT_memory_object_win32" );
            }
            if( extensions.Contains( "gl_EXT_misc_attribute" ) )
            {
                EXT_misc_attribute = true;
                extensions.Remove( "glEXT_misc_attribute" );
            }
            if( extensions.Contains( "gl_EXT_multi_draw_arrays" ) )
            {
                EXT_multi_draw_arrays = true;
                extensions.Remove( "glEXT_multi_draw_arrays" );
            }
            if( extensions.Contains( "gl_EXT_multisample" ) )
            {
                EXT_multisample = true;
                extensions.Remove( "glEXT_multisample" );
            }
            if( extensions.Contains( "gl_EXT_multiview_tessellation_geometry_shader" ) )
            {
                EXT_multiview_tessellation_geometry_shader = true;
                extensions.Remove( "glEXT_multiview_tessellation_geometry_shader" );
            }
            if( extensions.Contains( "gl_EXT_multiview_texture_multisample" ) )
            {
                EXT_multiview_texture_multisample = true;
                extensions.Remove( "glEXT_multiview_texture_multisample" );
            }
            if( extensions.Contains( "gl_EXT_multiview_timer_query" ) )
            {
                EXT_multiview_timer_query = true;
                extensions.Remove( "glEXT_multiview_timer_query" );
            }
            if( extensions.Contains( "gl_EXT_packed_depth_stencil" ) )
            {
                EXT_packed_depth_stencil = true;
                extensions.Remove( "glEXT_packed_depth_stencil" );
            }
            if( extensions.Contains( "gl_EXT_packed_float" ) )
            {
                EXT_packed_float = true;
                extensions.Remove( "glEXT_packed_float" );
            }
            if( extensions.Contains( "gl_EXT_packed_pixels" ) )
            {
                EXT_packed_pixels = true;
                extensions.Remove( "glEXT_packed_pixels" );
            }
            if( extensions.Contains( "gl_EXT_paletted_texture" ) )
            {
                EXT_paletted_texture = true;
                extensions.Remove( "glEXT_paletted_texture" );
            }
            if( extensions.Contains( "gl_EXT_pixel_buffer_object" ) )
            {
                EXT_pixel_buffer_object = true;
                extensions.Remove( "glEXT_pixel_buffer_object" );
            }
            if( extensions.Contains( "gl_EXT_pixel_transform" ) )
            {
                EXT_pixel_transform = true;
                extensions.Remove( "glEXT_pixel_transform" );
            }
            if( extensions.Contains( "gl_EXT_pixel_transform_color_table" ) )
            {
                EXT_pixel_transform_color_table = true;
                extensions.Remove( "glEXT_pixel_transform_color_table" );
            }
            if( extensions.Contains( "gl_EXT_point_parameters" ) )
            {
                EXT_point_parameters = true;
                extensions.Remove( "glEXT_point_parameters" );
            }
            if( extensions.Contains( "gl_EXT_polygon_offset" ) )
            {
                EXT_polygon_offset = true;
                extensions.Remove( "glEXT_polygon_offset" );
            }
            if( extensions.Contains( "gl_EXT_polygon_offset_clamp" ) )
            {
                EXT_polygon_offset_clamp = true;
                extensions.Remove( "glEXT_polygon_offset_clamp" );
            }
            if( extensions.Contains( "gl_EXT_post_depth_coverage" ) )
            {
                EXT_post_depth_coverage = true;
                extensions.Remove( "glEXT_post_depth_coverage" );
            }
            if( extensions.Contains( "gl_EXT_provoking_vertex" ) )
            {
                EXT_provoking_vertex = true;
                extensions.Remove( "glEXT_provoking_vertex" );
            }
            if( extensions.Contains( "gl_EXT_raster_multisample" ) )
            {
                EXT_raster_multisample = true;
                extensions.Remove( "glEXT_raster_multisample" );
            }
            if( extensions.Contains( "gl_EXT_rescale_normal" ) )
            {
                EXT_rescale_normal = true;
                extensions.Remove( "glEXT_rescale_normal" );
            }
            if( extensions.Contains( "gl_EXT_secondary_color" ) )
            {
                EXT_secondary_color = true;
                extensions.Remove( "glEXT_secondary_color" );
            }
            if( extensions.Contains( "gl_EXT_semaphore" ) )
            {
                EXT_semaphore = true;
                extensions.Remove( "glEXT_semaphore" );
            }
            if( extensions.Contains( "gl_EXT_semaphore_fd" ) )
            {
                EXT_semaphore_fd = true;
                extensions.Remove( "glEXT_semaphore_fd" );
            }
            if( extensions.Contains( "gl_EXT_semaphore_win32" ) )
            {
                EXT_semaphore_win32 = true;
                extensions.Remove( "glEXT_semaphore_win32" );
            }
            if( extensions.Contains( "gl_EXT_separate_shader_objects" ) )
            {
                EXT_separate_shader_objects = true;
                extensions.Remove( "glEXT_separate_shader_objects" );
            }
            if( extensions.Contains( "gl_EXT_separate_specular_color" ) )
            {
                EXT_separate_specular_color = true;
                extensions.Remove( "glEXT_separate_specular_color" );
            }
            if( extensions.Contains( "gl_EXT_shader_framebuffer_fetch" ) )
            {
                EXT_shader_framebuffer_fetch = true;
                extensions.Remove( "glEXT_shader_framebuffer_fetch" );
            }
            if( extensions.Contains( "gl_EXT_shader_framebuffer_fetch_non_coherent" ) )
            {
                EXT_shader_framebuffer_fetch_non_coherent = true;
                extensions.Remove( "glEXT_shader_framebuffer_fetch_non_coherent" );
            }
            if( extensions.Contains( "gl_EXT_shader_image_load_formatted" ) )
            {
                EXT_shader_image_load_formatted = true;
                extensions.Remove( "glEXT_shader_image_load_formatted" );
            }
            if( extensions.Contains( "gl_EXT_shader_image_load_store" ) )
            {
                EXT_shader_image_load_store = true;
                extensions.Remove( "glEXT_shader_image_load_store" );
            }
            if( extensions.Contains( "gl_EXT_shader_integer_mix" ) )
            {
                EXT_shader_integer_mix = true;
                extensions.Remove( "glEXT_shader_integer_mix" );
            }
            if( extensions.Contains( "gl_EXT_shader_samples_identical" ) )
            {
                EXT_shader_samples_identical = true;
                extensions.Remove( "glEXT_shader_samples_identical" );
            }
            if( extensions.Contains( "gl_EXT_shadow_funcs" ) )
            {
                EXT_shadow_funcs = true;
                extensions.Remove( "glEXT_shadow_funcs" );
            }
            if( extensions.Contains( "gl_EXT_shared_texture_palette" ) )
            {
                EXT_shared_texture_palette = true;
                extensions.Remove( "glEXT_shared_texture_palette" );
            }
            if( extensions.Contains( "gl_EXT_sparse_texture2" ) )
            {
                EXT_sparse_texture2 = true;
                extensions.Remove( "glEXT_sparse_texture2" );
            }
            if( extensions.Contains( "gl_EXT_stencil_clear_tag" ) )
            {
                EXT_stencil_clear_tag = true;
                extensions.Remove( "glEXT_stencil_clear_tag" );
            }
            if( extensions.Contains( "gl_EXT_stencil_two_side" ) )
            {
                EXT_stencil_two_side = true;
                extensions.Remove( "glEXT_stencil_two_side" );
            }
            if( extensions.Contains( "gl_EXT_stencil_wrap" ) )
            {
                EXT_stencil_wrap = true;
                extensions.Remove( "glEXT_stencil_wrap" );
            }
            if( extensions.Contains( "gl_EXT_subtexture" ) )
            {
                EXT_subtexture = true;
                extensions.Remove( "glEXT_subtexture" );
            }
            if( extensions.Contains( "gl_EXT_texture" ) )
            {
                EXT_texture = true;
                extensions.Remove( "glEXT_texture" );
            }
            if( extensions.Contains( "gl_EXT_texture3D" ) )
            {
                EXT_texture3D = true;
                extensions.Remove( "glEXT_texture3D" );
            }
            if( extensions.Contains( "gl_EXT_texture_array" ) )
            {
                EXT_texture_array = true;
                extensions.Remove( "glEXT_texture_array" );
            }
            if( extensions.Contains( "gl_EXT_texture_buffer_object" ) )
            {
                EXT_texture_buffer_object = true;
                extensions.Remove( "glEXT_texture_buffer_object" );
            }
            if( extensions.Contains( "gl_EXT_texture_compression_latc" ) )
            {
                EXT_texture_compression_latc = true;
                extensions.Remove( "glEXT_texture_compression_latc" );
            }
            if( extensions.Contains( "gl_EXT_texture_compression_rgtc" ) )
            {
                EXT_texture_compression_rgtc = true;
                extensions.Remove( "glEXT_texture_compression_rgtc" );
            }
            if( extensions.Contains( "gl_EXT_texture_compression_s3tc" ) )
            {
                EXT_texture_compression_s3tc = true;
                extensions.Remove( "glEXT_texture_compression_s3tc" );
            }
            if( extensions.Contains( "gl_EXT_texture_cube_map" ) )
            {
                EXT_texture_cube_map = true;
                extensions.Remove( "glEXT_texture_cube_map" );
            }
            if( extensions.Contains( "gl_EXT_texture_env_add" ) )
            {
                EXT_texture_env_add = true;
                extensions.Remove( "glEXT_texture_env_add" );
            }
            if( extensions.Contains( "gl_EXT_texture_env_combine" ) )
            {
                EXT_texture_env_combine = true;
                extensions.Remove( "glEXT_texture_env_combine" );
            }
            if( extensions.Contains( "gl_EXT_texture_env_dot3" ) )
            {
                EXT_texture_env_dot3 = true;
                extensions.Remove( "glEXT_texture_env_dot3" );
            }
            if( extensions.Contains( "gl_EXT_texture_filter_anisotropic" ) )
            {
                EXT_texture_filter_anisotropic = true;
                extensions.Remove( "glEXT_texture_filter_anisotropic" );
            }
            if( extensions.Contains( "gl_EXT_texture_filter_minmax" ) )
            {
                EXT_texture_filter_minmax = true;
                extensions.Remove( "glEXT_texture_filter_minmax" );
            }
            if( extensions.Contains( "gl_EXT_texture_integer" ) )
            {
                EXT_texture_integer = true;
                extensions.Remove( "glEXT_texture_integer" );
            }
            if( extensions.Contains( "gl_EXT_texture_lod_bias" ) )
            {
                EXT_texture_lod_bias = true;
                extensions.Remove( "glEXT_texture_lod_bias" );
            }
            if( extensions.Contains( "gl_EXT_texture_mirror_clamp" ) )
            {
                EXT_texture_mirror_clamp = true;
                extensions.Remove( "glEXT_texture_mirror_clamp" );
            }
            if( extensions.Contains( "gl_EXT_texture_object" ) )
            {
                EXT_texture_object = true;
                extensions.Remove( "glEXT_texture_object" );
            }
            if( extensions.Contains( "gl_EXT_texture_perturb_normal" ) )
            {
                EXT_texture_perturb_normal = true;
                extensions.Remove( "glEXT_texture_perturb_normal" );
            }
            if( extensions.Contains( "gl_EXT_texture_sRGB" ) )
            {
                EXT_texture_sRGB = true;
                extensions.Remove( "glEXT_texture_sRGB" );
            }
            if( extensions.Contains( "gl_EXT_texture_sRGB_R8" ) )
            {
                EXT_texture_sRGB_R8 = true;
                extensions.Remove( "glEXT_texture_sRGB_R8" );
            }
            if( extensions.Contains( "gl_EXT_texture_sRGB_RG8" ) )
            {
                EXT_texture_sRGB_RG8 = true;
                extensions.Remove( "glEXT_texture_sRGB_RG8" );
            }
            if( extensions.Contains( "gl_EXT_texture_sRGB_decode" ) )
            {
                EXT_texture_sRGB_decode = true;
                extensions.Remove( "glEXT_texture_sRGB_decode" );
            }
            if( extensions.Contains( "gl_EXT_texture_shadow_lod" ) )
            {
                EXT_texture_shadow_lod = true;
                extensions.Remove( "glEXT_texture_shadow_lod" );
            }
            if( extensions.Contains( "gl_EXT_texture_shared_exponent" ) )
            {
                EXT_texture_shared_exponent = true;
                extensions.Remove( "glEXT_texture_shared_exponent" );
            }
            if( extensions.Contains( "gl_EXT_texture_snorm" ) )
            {
                EXT_texture_snorm = true;
                extensions.Remove( "glEXT_texture_snorm" );
            }
            if( extensions.Contains( "gl_EXT_texture_storage" ) )
            {
                EXT_texture_storage = true;
                extensions.Remove( "glEXT_texture_storage" );
            }
            if( extensions.Contains( "gl_EXT_texture_swizzle" ) )
            {
                EXT_texture_swizzle = true;
                extensions.Remove( "glEXT_texture_swizzle" );
            }
            if( extensions.Contains( "gl_EXT_timer_query" ) )
            {
                EXT_timer_query = true;
                extensions.Remove( "glEXT_timer_query" );
            }
            if( extensions.Contains( "gl_EXT_transform_feedback" ) )
            {
                EXT_transform_feedback = true;
                extensions.Remove( "glEXT_transform_feedback" );
            }
            if( extensions.Contains( "gl_EXT_vertex_array" ) )
            {
                EXT_vertex_array = true;
                extensions.Remove( "glEXT_vertex_array" );
            }
            if( extensions.Contains( "gl_EXT_vertex_array_bgra" ) )
            {
                EXT_vertex_array_bgra = true;
                extensions.Remove( "glEXT_vertex_array_bgra" );
            }
            if( extensions.Contains( "gl_EXT_vertex_attrib_64bit" ) )
            {
                EXT_vertex_attrib_64bit = true;
                extensions.Remove( "glEXT_vertex_attrib_64bit" );
            }
            if( extensions.Contains( "gl_EXT_vertex_shader" ) )
            {
                EXT_vertex_shader = true;
                extensions.Remove( "glEXT_vertex_shader" );
            }
            if( extensions.Contains( "gl_EXT_vertex_weighting" ) )
            {
                EXT_vertex_weighting = true;
                extensions.Remove( "glEXT_vertex_weighting" );
            }
            if( extensions.Contains( "gl_EXT_win32_keyed_mutex" ) )
            {
                EXT_win32_keyed_mutex = true;
                extensions.Remove( "glEXT_win32_keyed_mutex" );
            }
            if( extensions.Contains( "gl_EXT_window_rectangles" ) )
            {
                EXT_window_rectangles = true;
                extensions.Remove( "glEXT_window_rectangles" );
            }
            if( extensions.Contains( "gl_EXT_x11_sync_object" ) )
            {
                EXT_x11_sync_object = true;
                extensions.Remove( "glEXT_x11_sync_object" );
            }
            if( extensions.Contains( "gl_GREMEDY_frame_terminator" ) )
            {
                GREMEDY_frame_terminator = true;
                extensions.Remove( "glGREMEDY_frame_terminator" );
            }
            if( extensions.Contains( "gl_GREMEDY_string_marker" ) )
            {
                GREMEDY_string_marker = true;
                extensions.Remove( "glGREMEDY_string_marker" );
            }
            if( extensions.Contains( "gl_HP_convolution_border_modes" ) )
            {
                HP_convolution_border_modes = true;
                extensions.Remove( "glHP_convolution_border_modes" );
            }
            if( extensions.Contains( "gl_HP_image_transform" ) )
            {
                HP_image_transform = true;
                extensions.Remove( "glHP_image_transform" );
            }
            if( extensions.Contains( "gl_HP_occlusion_test" ) )
            {
                HP_occlusion_test = true;
                extensions.Remove( "glHP_occlusion_test" );
            }
            if( extensions.Contains( "gl_HP_texture_lighting" ) )
            {
                HP_texture_lighting = true;
                extensions.Remove( "glHP_texture_lighting" );
            }
            if( extensions.Contains( "gl_IBM_cull_vertex" ) )
            {
                IBM_cull_vertex = true;
                extensions.Remove( "glIBM_cull_vertex" );
            }
            if( extensions.Contains( "gl_IBM_multimode_draw_arrays" ) )
            {
                IBM_multimode_draw_arrays = true;
                extensions.Remove( "glIBM_multimode_draw_arrays" );
            }
            if( extensions.Contains( "gl_IBM_rasterpos_clip" ) )
            {
                IBM_rasterpos_clip = true;
                extensions.Remove( "glIBM_rasterpos_clip" );
            }
            if( extensions.Contains( "gl_IBM_static_data" ) )
            {
                IBM_static_data = true;
                extensions.Remove( "glIBM_static_data" );
            }
            if( extensions.Contains( "gl_IBM_texture_mirrored_repeat" ) )
            {
                IBM_texture_mirrored_repeat = true;
                extensions.Remove( "glIBM_texture_mirrored_repeat" );
            }
            if( extensions.Contains( "gl_IBM_vertex_array_lists" ) )
            {
                IBM_vertex_array_lists = true;
                extensions.Remove( "glIBM_vertex_array_lists" );
            }
            if( extensions.Contains( "gl_INGR_blend_func_separate" ) )
            {
                INGR_blend_func_separate = true;
                extensions.Remove( "glINGR_blend_func_separate" );
            }
            if( extensions.Contains( "gl_INGR_color_clamp" ) )
            {
                INGR_color_clamp = true;
                extensions.Remove( "glINGR_color_clamp" );
            }
            if( extensions.Contains( "gl_INGR_interlace_read" ) )
            {
                INGR_interlace_read = true;
                extensions.Remove( "glINGR_interlace_read" );
            }
            if( extensions.Contains( "gl_INTEL_blackhole_render" ) )
            {
                INTEL_blackhole_render = true;
                extensions.Remove( "glINTEL_blackhole_render" );
            }
            if( extensions.Contains( "gl_INTEL_conservative_rasterization" ) )
            {
                INTEL_conservative_rasterization = true;
                extensions.Remove( "glINTEL_conservative_rasterization" );
            }
            if( extensions.Contains( "gl_INTEL_fragment_shader_ordering" ) )
            {
                INTEL_fragment_shader_ordering = true;
                extensions.Remove( "glINTEL_fragment_shader_ordering" );
            }
            if( extensions.Contains( "gl_INTEL_framebuffer_CMAA" ) )
            {
                INTEL_framebuffer_CMAA = true;
                extensions.Remove( "glINTEL_framebuffer_CMAA" );
            }
            if( extensions.Contains( "gl_INTEL_map_texture" ) )
            {
                INTEL_map_texture = true;
                extensions.Remove( "glINTEL_map_texture" );
            }
            if( extensions.Contains( "gl_INTEL_parallel_arrays" ) )
            {
                INTEL_parallel_arrays = true;
                extensions.Remove( "glINTEL_parallel_arrays" );
            }
            if( extensions.Contains( "gl_INTEL_performance_query" ) )
            {
                INTEL_performance_query = true;
                extensions.Remove( "glINTEL_performance_query" );
            }
            if( extensions.Contains( "gl_KHR_blend_equation_advanced" ) )
            {
                KHR_blend_equation_advanced = true;
                extensions.Remove( "glKHR_blend_equation_advanced" );
            }
            if( extensions.Contains( "gl_KHR_blend_equation_advanced_coherent" ) )
            {
                KHR_blend_equation_advanced_coherent = true;
                extensions.Remove( "glKHR_blend_equation_advanced_coherent" );
            }
            if( extensions.Contains( "gl_KHR_context_flush_control" ) )
            {
                KHR_context_flush_control = true;
                extensions.Remove( "glKHR_context_flush_control" );
            }
            if( extensions.Contains( "gl_KHR_debug" ) )
            {
                KHR_debug = true;
                extensions.Remove( "glKHR_debug" );
            }
            if( extensions.Contains( "gl_KHR_no_error" ) )
            {
                KHR_no_error = true;
                extensions.Remove( "glKHR_no_error" );
            }
            if( extensions.Contains( "gl_KHR_parallel_shader_compile" ) )
            {
                KHR_parallel_shader_compile = true;
                extensions.Remove( "glKHR_parallel_shader_compile" );
            }
            if( extensions.Contains( "gl_KHR_robust_buffer_access_behavior" ) )
            {
                KHR_robust_buffer_access_behavior = true;
                extensions.Remove( "glKHR_robust_buffer_access_behavior" );
            }
            if( extensions.Contains( "gl_KHR_robustness" ) )
            {
                KHR_robustness = true;
                extensions.Remove( "glKHR_robustness" );
            }
            if( extensions.Contains( "gl_KHR_shader_subgroup" ) )
            {
                KHR_shader_subgroup = true;
                extensions.Remove( "glKHR_shader_subgroup" );
            }
            if( extensions.Contains( "gl_KHR_texture_compression_astc_hdr" ) )
            {
                KHR_texture_compression_astc_hdr = true;
                extensions.Remove( "glKHR_texture_compression_astc_hdr" );
            }
            if( extensions.Contains( "gl_KHR_texture_compression_astc_ldr" ) )
            {
                KHR_texture_compression_astc_ldr = true;
                extensions.Remove( "glKHR_texture_compression_astc_ldr" );
            }
            if( extensions.Contains( "gl_KHR_texture_compression_astc_sliced_3d" ) )
            {
                KHR_texture_compression_astc_sliced_3d = true;
                extensions.Remove( "glKHR_texture_compression_astc_sliced_3d" );
            }
            if( extensions.Contains( "gl_MESAX_texture_stack" ) )
            {
                MESAX_texture_stack = true;
                extensions.Remove( "glMESAX_texture_stack" );
            }
            if( extensions.Contains( "gl_MESA_framebuffer_flip_x" ) )
            {
                MESA_framebuffer_flip_x = true;
                extensions.Remove( "glMESA_framebuffer_flip_x" );
            }
            if( extensions.Contains( "gl_MESA_framebuffer_flip_y" ) )
            {
                MESA_framebuffer_flip_y = true;
                extensions.Remove( "glMESA_framebuffer_flip_y" );
            }
            if( extensions.Contains( "gl_MESA_framebuffer_swap_xy" ) )
            {
                MESA_framebuffer_swap_xy = true;
                extensions.Remove( "glMESA_framebuffer_swap_xy" );
            }
            if( extensions.Contains( "gl_MESA_pack_invert" ) )
            {
                MESA_pack_invert = true;
                extensions.Remove( "glMESA_pack_invert" );
            }
            if( extensions.Contains( "gl_MESA_program_binary_formats" ) )
            {
                MESA_program_binary_formats = true;
                extensions.Remove( "glMESA_program_binary_formats" );
            }
            if( extensions.Contains( "gl_MESA_resize_buffers" ) )
            {
                MESA_resize_buffers = true;
                extensions.Remove( "glMESA_resize_buffers" );
            }
            if( extensions.Contains( "gl_MESA_shader_integer_functions" ) )
            {
                MESA_shader_integer_functions = true;
                extensions.Remove( "glMESA_shader_integer_functions" );
            }
            if( extensions.Contains( "gl_MESA_tile_raster_order" ) )
            {
                MESA_tile_raster_order = true;
                extensions.Remove( "glMESA_tile_raster_order" );
            }
            if( extensions.Contains( "gl_MESA_window_pos" ) )
            {
                MESA_window_pos = true;
                extensions.Remove( "glMESA_window_pos" );
            }
            if( extensions.Contains( "gl_MESA_ycbcr_texture" ) )
            {
                MESA_ycbcr_texture = true;
                extensions.Remove( "glMESA_ycbcr_texture" );
            }
            if( extensions.Contains( "gl_NVX_blend_equation_advanced_multi_draw_buffers" ) )
            {
                NVX_blend_equation_advanced_multi_draw_buffers = true;
                extensions.Remove( "glNVX_blend_equation_advanced_multi_draw_buffers" );
            }
            if( extensions.Contains( "gl_NVX_conditional_render" ) )
            {
                NVX_conditional_render = true;
                extensions.Remove( "glNVX_conditional_render" );
            }
            if( extensions.Contains( "gl_NVX_gpu_memory_info" ) )
            {
                NVX_gpu_memory_info = true;
                extensions.Remove( "glNVX_gpu_memory_info" );
            }
            if( extensions.Contains( "gl_NVX_gpu_multicast2" ) )
            {
                NVX_gpu_multicast2 = true;
                extensions.Remove( "glNVX_gpu_multicast2" );
            }
            if( extensions.Contains( "gl_NVX_linked_gpu_multicast" ) )
            {
                NVX_linked_gpu_multicast = true;
                extensions.Remove( "glNVX_linked_gpu_multicast" );
            }
            if( extensions.Contains( "gl_NVX_progress_fence" ) )
            {
                NVX_progress_fence = true;
                extensions.Remove( "glNVX_progress_fence" );
            }
            if( extensions.Contains( "gl_NV_alpha_to_coverage_dither_control" ) )
            {
                NV_alpha_to_coverage_dither_control = true;
                extensions.Remove( "glNV_alpha_to_coverage_dither_control" );
            }
            if( extensions.Contains( "gl_NV_bindless_multi_draw_indirect" ) )
            {
                NV_bindless_multi_draw_indirect = true;
                extensions.Remove( "glNV_bindless_multi_draw_indirect" );
            }
            if( extensions.Contains( "gl_NV_bindless_multi_draw_indirect_count" ) )
            {
                NV_bindless_multi_draw_indirect_count = true;
                extensions.Remove( "glNV_bindless_multi_draw_indirect_count" );
            }
            if( extensions.Contains( "gl_NV_bindless_texture" ) )
            {
                NV_bindless_texture = true;
                extensions.Remove( "glNV_bindless_texture" );
            }
            if( extensions.Contains( "gl_NV_blend_equation_advanced" ) )
            {
                NV_blend_equation_advanced = true;
                extensions.Remove( "glNV_blend_equation_advanced" );
            }
            if( extensions.Contains( "gl_NV_blend_equation_advanced_coherent" ) )
            {
                NV_blend_equation_advanced_coherent = true;
                extensions.Remove( "glNV_blend_equation_advanced_coherent" );
            }
            if( extensions.Contains( "gl_NV_blend_minmax_factor" ) )
            {
                NV_blend_minmax_factor = true;
                extensions.Remove( "glNV_blend_minmax_factor" );
            }
            if( extensions.Contains( "gl_NV_blend_square" ) )
            {
                NV_blend_square = true;
                extensions.Remove( "glNV_blend_square" );
            }
            if( extensions.Contains( "gl_NV_clip_space_w_scaling" ) )
            {
                NV_clip_space_w_scaling = true;
                extensions.Remove( "glNV_clip_space_w_scaling" );
            }
            if( extensions.Contains( "gl_NV_command_list" ) )
            {
                NV_command_list = true;
                extensions.Remove( "glNV_command_list" );
            }
            if( extensions.Contains( "gl_NV_compute_program5" ) )
            {
                NV_compute_program5 = true;
                extensions.Remove( "glNV_compute_program5" );
            }
            if( extensions.Contains( "gl_NV_compute_shader_derivatives" ) )
            {
                NV_compute_shader_derivatives = true;
                extensions.Remove( "glNV_compute_shader_derivatives" );
            }
            if( extensions.Contains( "gl_NV_conditional_render" ) )
            {
                NV_conditional_render = true;
                extensions.Remove( "glNV_conditional_render" );
            }
            if( extensions.Contains( "gl_NV_conservative_raster" ) )
            {
                NV_conservative_raster = true;
                extensions.Remove( "glNV_conservative_raster" );
            }
            if( extensions.Contains( "gl_NV_conservative_raster_dilate" ) )
            {
                NV_conservative_raster_dilate = true;
                extensions.Remove( "glNV_conservative_raster_dilate" );
            }
            if( extensions.Contains( "gl_NV_conservative_raster_pre_snap" ) )
            {
                NV_conservative_raster_pre_snap = true;
                extensions.Remove( "glNV_conservative_raster_pre_snap" );
            }
            if( extensions.Contains( "gl_NV_conservative_raster_pre_snap_triangles" ) )
            {
                NV_conservative_raster_pre_snap_triangles = true;
                extensions.Remove( "glNV_conservative_raster_pre_snap_triangles" );
            }
            if( extensions.Contains( "gl_NV_conservative_raster_underestimation" ) )
            {
                NV_conservative_raster_underestimation = true;
                extensions.Remove( "glNV_conservative_raster_underestimation" );
            }
            if( extensions.Contains( "gl_NV_copy_depth_to_color" ) )
            {
                NV_copy_depth_to_color = true;
                extensions.Remove( "glNV_copy_depth_to_color" );
            }
            if( extensions.Contains( "gl_NV_copy_image" ) )
            {
                NV_copy_image = true;
                extensions.Remove( "glNV_copy_image" );
            }
            if( extensions.Contains( "gl_NV_deep_texture3D" ) )
            {
                NV_deep_texture3D = true;
                extensions.Remove( "glNV_deep_texture3D" );
            }
            if( extensions.Contains( "gl_NV_depth_buffer_float" ) )
            {
                NV_depth_buffer_float = true;
                extensions.Remove( "glNV_depth_buffer_float" );
            }
            if( extensions.Contains( "gl_NV_depth_clamp" ) )
            {
                NV_depth_clamp = true;
                extensions.Remove( "glNV_depth_clamp" );
            }
            if( extensions.Contains( "gl_NV_draw_texture" ) )
            {
                NV_draw_texture = true;
                extensions.Remove( "glNV_draw_texture" );
            }
            if( extensions.Contains( "gl_NV_draw_vulkan_image" ) )
            {
                NV_draw_vulkan_image = true;
                extensions.Remove( "glNV_draw_vulkan_image" );
            }
            if( extensions.Contains( "gl_NV_evaluators" ) )
            {
                NV_evaluators = true;
                extensions.Remove( "glNV_evaluators" );
            }
            if( extensions.Contains( "gl_NV_explicit_multisample" ) )
            {
                NV_explicit_multisample = true;
                extensions.Remove( "glNV_explicit_multisample" );
            }
            if( extensions.Contains( "gl_NV_fence" ) )
            {
                NV_fence = true;
                extensions.Remove( "glNV_fence" );
            }
            if( extensions.Contains( "gl_NV_fill_rectangle" ) )
            {
                NV_fill_rectangle = true;
                extensions.Remove( "glNV_fill_rectangle" );
            }
            if( extensions.Contains( "gl_NV_float_buffer" ) )
            {
                NV_float_buffer = true;
                extensions.Remove( "glNV_float_buffer" );
            }
            if( extensions.Contains( "gl_NV_fog_distance" ) )
            {
                NV_fog_distance = true;
                extensions.Remove( "glNV_fog_distance" );
            }
            if( extensions.Contains( "gl_NV_fragment_coverage_to_color" ) )
            {
                NV_fragment_coverage_to_color = true;
                extensions.Remove( "glNV_fragment_coverage_to_color" );
            }
            if( extensions.Contains( "gl_NV_fragment_program" ) )
            {
                NV_fragment_program = true;
                extensions.Remove( "glNV_fragment_program" );
            }
            if( extensions.Contains( "gl_NV_fragment_program2" ) )
            {
                NV_fragment_program2 = true;
                extensions.Remove( "glNV_fragment_program2" );
            }
            if( extensions.Contains( "gl_NV_fragment_program4" ) )
            {
                NV_fragment_program4 = true;
                extensions.Remove( "glNV_fragment_program4" );
            }
            if( extensions.Contains( "gl_NV_fragment_program_option" ) )
            {
                NV_fragment_program_option = true;
                extensions.Remove( "glNV_fragment_program_option" );
            }
            if( extensions.Contains( "gl_NV_fragment_shader_barycentric" ) )
            {
                NV_fragment_shader_barycentric = true;
                extensions.Remove( "glNV_fragment_shader_barycentric" );
            }
            if( extensions.Contains( "gl_NV_fragment_shader_interlock" ) )
            {
                NV_fragment_shader_interlock = true;
                extensions.Remove( "glNV_fragment_shader_interlock" );
            }
            if( extensions.Contains( "gl_NV_framebuffer_mixed_samples" ) )
            {
                NV_framebuffer_mixed_samples = true;
                extensions.Remove( "glNV_framebuffer_mixed_samples" );
            }
            if( extensions.Contains( "gl_NV_framebuffer_multisample_coverage" ) )
            {
                NV_framebuffer_multisample_coverage = true;
                extensions.Remove( "glNV_framebuffer_multisample_coverage" );
            }
            if( extensions.Contains( "gl_NV_geometry_program4" ) )
            {
                NV_geometry_program4 = true;
                extensions.Remove( "glNV_geometry_program4" );
            }
            if( extensions.Contains( "gl_NV_geometry_shader4" ) )
            {
                NV_geometry_shader4 = true;
                extensions.Remove( "glNV_geometry_shader4" );
            }
            if( extensions.Contains( "gl_NV_geometry_shader_passthrough" ) )
            {
                NV_geometry_shader_passthrough = true;
                extensions.Remove( "glNV_geometry_shader_passthrough" );
            }
            if( extensions.Contains( "gl_NV_gpu_multicast" ) )
            {
                NV_gpu_multicast = true;
                extensions.Remove( "glNV_gpu_multicast" );
            }
            if( extensions.Contains( "gl_NV_gpu_program4" ) )
            {
                NV_gpu_program4 = true;
                extensions.Remove( "glNV_gpu_program4" );
            }
            if( extensions.Contains( "gl_NV_gpu_program5" ) )
            {
                NV_gpu_program5 = true;
                extensions.Remove( "glNV_gpu_program5" );
            }
            if( extensions.Contains( "gl_NV_gpu_program5_mem_extended" ) )
            {
                NV_gpu_program5_mem_extended = true;
                extensions.Remove( "glNV_gpu_program5_mem_extended" );
            }
            if( extensions.Contains( "gl_NV_gpu_shader5" ) )
            {
                NV_gpu_shader5 = true;
                extensions.Remove( "glNV_gpu_shader5" );
            }
            if( extensions.Contains( "gl_NV_half_float" ) )
            {
                NV_half_float = true;
                extensions.Remove( "glNV_half_float" );
            }
            if( extensions.Contains( "gl_NV_internalformat_sample_query" ) )
            {
                NV_internalformat_sample_query = true;
                extensions.Remove( "glNV_internalformat_sample_query" );
            }
            if( extensions.Contains( "gl_NV_light_max_exponent" ) )
            {
                NV_light_max_exponent = true;
                extensions.Remove( "glNV_light_max_exponent" );
            }
            if( extensions.Contains( "gl_NV_memory_attachment" ) )
            {
                NV_memory_attachment = true;
                extensions.Remove( "glNV_memory_attachment" );
            }
            if( extensions.Contains( "gl_NV_memory_object_sparse" ) )
            {
                NV_memory_object_sparse = true;
                extensions.Remove( "glNV_memory_object_sparse" );
            }
            if( extensions.Contains( "gl_NV_mesh_shader" ) )
            {
                NV_mesh_shader = true;
                extensions.Remove( "glNV_mesh_shader" );
            }
            if( extensions.Contains( "gl_NV_multisample_coverage" ) )
            {
                NV_multisample_coverage = true;
                extensions.Remove( "glNV_multisample_coverage" );
            }
            if( extensions.Contains( "gl_NV_multisample_filter_hint" ) )
            {
                NV_multisample_filter_hint = true;
                extensions.Remove( "glNV_multisample_filter_hint" );
            }
            if( extensions.Contains( "gl_NV_occlusion_query" ) )
            {
                NV_occlusion_query = true;
                extensions.Remove( "glNV_occlusion_query" );
            }
            if( extensions.Contains( "gl_NV_packed_depth_stencil" ) )
            {
                NV_packed_depth_stencil = true;
                extensions.Remove( "glNV_packed_depth_stencil" );
            }
            if( extensions.Contains( "gl_NV_parameter_buffer_object" ) )
            {
                NV_parameter_buffer_object = true;
                extensions.Remove( "glNV_parameter_buffer_object" );
            }
            if( extensions.Contains( "gl_NV_parameter_buffer_object2" ) )
            {
                NV_parameter_buffer_object2 = true;
                extensions.Remove( "glNV_parameter_buffer_object2" );
            }
            if( extensions.Contains( "gl_NV_path_rendering" ) )
            {
                NV_path_rendering = true;
                extensions.Remove( "glNV_path_rendering" );
            }
            if( extensions.Contains( "gl_NV_path_rendering_shared_edge" ) )
            {
                NV_path_rendering_shared_edge = true;
                extensions.Remove( "glNV_path_rendering_shared_edge" );
            }
            if( extensions.Contains( "gl_NV_pixel_data_range" ) )
            {
                NV_pixel_data_range = true;
                extensions.Remove( "glNV_pixel_data_range" );
            }
            if( extensions.Contains( "gl_NV_point_sprite" ) )
            {
                NV_point_sprite = true;
                extensions.Remove( "glNV_point_sprite" );
            }
            if( extensions.Contains( "gl_NV_present_video" ) )
            {
                NV_present_video = true;
                extensions.Remove( "glNV_present_video" );
            }
            if( extensions.Contains( "gl_NV_primitive_restart" ) )
            {
                NV_primitive_restart = true;
                extensions.Remove( "glNV_primitive_restart" );
            }
            if( extensions.Contains( "gl_NV_primitive_shading_rate" ) )
            {
                NV_primitive_shading_rate = true;
                extensions.Remove( "glNV_primitive_shading_rate" );
            }
            if( extensions.Contains( "gl_NV_query_resource" ) )
            {
                NV_query_resource = true;
                extensions.Remove( "glNV_query_resource" );
            }
            if( extensions.Contains( "gl_NV_query_resource_tag" ) )
            {
                NV_query_resource_tag = true;
                extensions.Remove( "glNV_query_resource_tag" );
            }
            if( extensions.Contains( "gl_NV_register_combiners" ) )
            {
                NV_register_combiners = true;
                extensions.Remove( "glNV_register_combiners" );
            }
            if( extensions.Contains( "gl_NV_register_combiners2" ) )
            {
                NV_register_combiners2 = true;
                extensions.Remove( "glNV_register_combiners2" );
            }
            if( extensions.Contains( "gl_NV_representative_fragment_test" ) )
            {
                NV_representative_fragment_test = true;
                extensions.Remove( "glNV_representative_fragment_test" );
            }
            if( extensions.Contains( "gl_NV_robustness_video_memory_purge" ) )
            {
                NV_robustness_video_memory_purge = true;
                extensions.Remove( "glNV_robustness_video_memory_purge" );
            }
            if( extensions.Contains( "gl_NV_sample_locations" ) )
            {
                NV_sample_locations = true;
                extensions.Remove( "glNV_sample_locations" );
            }
            if( extensions.Contains( "gl_NV_sample_mask_override_coverage" ) )
            {
                NV_sample_mask_override_coverage = true;
                extensions.Remove( "glNV_sample_mask_override_coverage" );
            }
            if( extensions.Contains( "gl_NV_scissor_exclusive" ) )
            {
                NV_scissor_exclusive = true;
                extensions.Remove( "glNV_scissor_exclusive" );
            }
            if( extensions.Contains( "gl_NV_shader_atomic_counters" ) )
            {
                NV_shader_atomic_counters = true;
                extensions.Remove( "glNV_shader_atomic_counters" );
            }
            if( extensions.Contains( "gl_NV_shader_atomic_float" ) )
            {
                NV_shader_atomic_float = true;
                extensions.Remove( "glNV_shader_atomic_float" );
            }
            if( extensions.Contains( "gl_NV_shader_atomic_float64" ) )
            {
                NV_shader_atomic_float64 = true;
                extensions.Remove( "glNV_shader_atomic_float64" );
            }
            if( extensions.Contains( "gl_NV_shader_atomic_fp16_vector" ) )
            {
                NV_shader_atomic_fp16_vector = true;
                extensions.Remove( "glNV_shader_atomic_fp16_vector" );
            }
            if( extensions.Contains( "gl_NV_shader_atomic_int64" ) )
            {
                NV_shader_atomic_int64 = true;
                extensions.Remove( "glNV_shader_atomic_int64" );
            }
            if( extensions.Contains( "gl_NV_shader_buffer_load" ) )
            {
                NV_shader_buffer_load = true;
                extensions.Remove( "glNV_shader_buffer_load" );
            }
            if( extensions.Contains( "gl_NV_shader_buffer_store" ) )
            {
                NV_shader_buffer_store = true;
                extensions.Remove( "glNV_shader_buffer_store" );
            }
            if( extensions.Contains( "gl_NV_shader_storage_buffer_object" ) )
            {
                NV_shader_storage_buffer_object = true;
                extensions.Remove( "glNV_shader_storage_buffer_object" );
            }
            if( extensions.Contains( "gl_NV_shader_subgroup_partitioned" ) )
            {
                NV_shader_subgroup_partitioned = true;
                extensions.Remove( "glNV_shader_subgroup_partitioned" );
            }
            if( extensions.Contains( "gl_NV_shader_texture_footprint" ) )
            {
                NV_shader_texture_footprint = true;
                extensions.Remove( "glNV_shader_texture_footprint" );
            }
            if( extensions.Contains( "gl_NV_shader_thread_group" ) )
            {
                NV_shader_thread_group = true;
                extensions.Remove( "glNV_shader_thread_group" );
            }
            if( extensions.Contains( "gl_NV_shader_thread_shuffle" ) )
            {
                NV_shader_thread_shuffle = true;
                extensions.Remove( "glNV_shader_thread_shuffle" );
            }
            if( extensions.Contains( "gl_NV_shading_rate_image" ) )
            {
                NV_shading_rate_image = true;
                extensions.Remove( "glNV_shading_rate_image" );
            }
            if( extensions.Contains( "gl_NV_stereo_view_rendering" ) )
            {
                NV_stereo_view_rendering = true;
                extensions.Remove( "glNV_stereo_view_rendering" );
            }
            if( extensions.Contains( "gl_NV_tessellation_program5" ) )
            {
                NV_tessellation_program5 = true;
                extensions.Remove( "glNV_tessellation_program5" );
            }
            if( extensions.Contains( "gl_NV_texgen_emboss" ) )
            {
                NV_texgen_emboss = true;
                extensions.Remove( "glNV_texgen_emboss" );
            }
            if( extensions.Contains( "gl_NV_texgen_reflection" ) )
            {
                NV_texgen_reflection = true;
                extensions.Remove( "glNV_texgen_reflection" );
            }
            if( extensions.Contains( "gl_NV_texture_barrier" ) )
            {
                NV_texture_barrier = true;
                extensions.Remove( "glNV_texture_barrier" );
            }
            if( extensions.Contains( "gl_NV_texture_compression_vtc" ) )
            {
                NV_texture_compression_vtc = true;
                extensions.Remove( "glNV_texture_compression_vtc" );
            }
            if( extensions.Contains( "gl_NV_texture_env_combine4" ) )
            {
                NV_texture_env_combine4 = true;
                extensions.Remove( "glNV_texture_env_combine4" );
            }
            if( extensions.Contains( "gl_NV_texture_expand_normal" ) )
            {
                NV_texture_expand_normal = true;
                extensions.Remove( "glNV_texture_expand_normal" );
            }
            if( extensions.Contains( "gl_NV_texture_multisample" ) )
            {
                NV_texture_multisample = true;
                extensions.Remove( "glNV_texture_multisample" );
            }
            if( extensions.Contains( "gl_NV_texture_rectangle" ) )
            {
                NV_texture_rectangle = true;
                extensions.Remove( "glNV_texture_rectangle" );
            }
            if( extensions.Contains( "gl_NV_texture_rectangle_compressed" ) )
            {
                NV_texture_rectangle_compressed = true;
                extensions.Remove( "glNV_texture_rectangle_compressed" );
            }
            if( extensions.Contains( "gl_NV_texture_shader" ) )
            {
                NV_texture_shader = true;
                extensions.Remove( "glNV_texture_shader" );
            }
            if( extensions.Contains( "gl_NV_texture_shader2" ) )
            {
                NV_texture_shader2 = true;
                extensions.Remove( "glNV_texture_shader2" );
            }
            if( extensions.Contains( "gl_NV_texture_shader3" ) )
            {
                NV_texture_shader3 = true;
                extensions.Remove( "glNV_texture_shader3" );
            }
            if( extensions.Contains( "gl_NV_timeline_semaphore" ) )
            {
                NV_timeline_semaphore = true;
                extensions.Remove( "glNV_timeline_semaphore" );
            }
            if( extensions.Contains( "gl_NV_transform_feedback" ) )
            {
                NV_transform_feedback = true;
                extensions.Remove( "glNV_transform_feedback" );
            }
            if( extensions.Contains( "gl_NV_transform_feedback2" ) )
            {
                NV_transform_feedback2 = true;
                extensions.Remove( "glNV_transform_feedback2" );
            }
            if( extensions.Contains( "gl_NV_uniform_buffer_std430_layout" ) )
            {
                NV_uniform_buffer_std430_layout = true;
                extensions.Remove( "glNV_uniform_buffer_std430_layout" );
            }
            if( extensions.Contains( "gl_NV_uniform_buffer_unified_memory" ) )
            {
                NV_uniform_buffer_unified_memory = true;
                extensions.Remove( "glNV_uniform_buffer_unified_memory" );
            }
            if( extensions.Contains( "gl_NV_vdpau_interop" ) )
            {
                NV_vdpau_interop = true;
                extensions.Remove( "glNV_vdpau_interop" );
            }
            if( extensions.Contains( "gl_NV_vdpau_interop2" ) )
            {
                NV_vdpau_interop2 = true;
                extensions.Remove( "glNV_vdpau_interop2" );
            }
            if( extensions.Contains( "gl_NV_vertex_array_range" ) )
            {
                NV_vertex_array_range = true;
                extensions.Remove( "glNV_vertex_array_range" );
            }
            if( extensions.Contains( "gl_NV_vertex_array_range2" ) )
            {
                NV_vertex_array_range2 = true;
                extensions.Remove( "glNV_vertex_array_range2" );
            }
            if( extensions.Contains( "gl_NV_vertex_attrib_integer_64bit" ) )
            {
                NV_vertex_attrib_integer_64bit = true;
                extensions.Remove( "glNV_vertex_attrib_integer_64bit" );
            }
            if( extensions.Contains( "gl_NV_vertex_buffer_unified_memory" ) )
            {
                NV_vertex_buffer_unified_memory = true;
                extensions.Remove( "glNV_vertex_buffer_unified_memory" );
            }
            if( extensions.Contains( "gl_NV_vertex_program" ) )
            {
                NV_vertex_program = true;
                extensions.Remove( "glNV_vertex_program" );
            }
            if( extensions.Contains( "gl_NV_vertex_program1_1" ) )
            {
                NV_vertex_program1_1 = true;
                extensions.Remove( "glNV_vertex_program1_1" );
            }
            if( extensions.Contains( "gl_NV_vertex_program2" ) )
            {
                NV_vertex_program2 = true;
                extensions.Remove( "glNV_vertex_program2" );
            }
            if( extensions.Contains( "gl_NV_vertex_program2_option" ) )
            {
                NV_vertex_program2_option = true;
                extensions.Remove( "glNV_vertex_program2_option" );
            }
            if( extensions.Contains( "gl_NV_vertex_program3" ) )
            {
                NV_vertex_program3 = true;
                extensions.Remove( "glNV_vertex_program3" );
            }
            if( extensions.Contains( "gl_NV_vertex_program4" ) )
            {
                NV_vertex_program4 = true;
                extensions.Remove( "glNV_vertex_program4" );
            }
            if( extensions.Contains( "gl_NV_video_capture" ) )
            {
                NV_video_capture = true;
                extensions.Remove( "glNV_video_capture" );
            }
            if( extensions.Contains( "gl_NV_viewport_array2" ) )
            {
                NV_viewport_array2 = true;
                extensions.Remove( "glNV_viewport_array2" );
            }
            if( extensions.Contains( "gl_NV_viewport_swizzle" ) )
            {
                NV_viewport_swizzle = true;
                extensions.Remove( "glNV_viewport_swizzle" );
            }
            if( extensions.Contains( "gl_OES_byte_coordinates" ) )
            {
                OES_byte_coordinates = true;
                extensions.Remove( "glOES_byte_coordinates" );
            }
            if( extensions.Contains( "gl_OES_compressed_paletted_texture" ) )
            {
                OES_compressed_paletted_texture = true;
                extensions.Remove( "glOES_compressed_paletted_texture" );
            }
            if( extensions.Contains( "gl_OES_fixed_point" ) )
            {
                OES_fixed_point = true;
                extensions.Remove( "glOES_fixed_point" );
            }
            if( extensions.Contains( "gl_OES_query_matrix" ) )
            {
                OES_query_matrix = true;
                extensions.Remove( "glOES_query_matrix" );
            }
            if( extensions.Contains( "gl_OES_read_format" ) )
            {
                OES_read_format = true;
                extensions.Remove( "glOES_read_format" );
            }
            if( extensions.Contains( "gl_OES_single_precision" ) )
            {
                OES_single_precision = true;
                extensions.Remove( "glOES_single_precision" );
            }
            if( extensions.Contains( "gl_OML_interlace" ) )
            {
                OML_interlace = true;
                extensions.Remove( "glOML_interlace" );
            }
            if( extensions.Contains( "gl_OML_resample" ) )
            {
                OML_resample = true;
                extensions.Remove( "glOML_resample" );
            }
            if( extensions.Contains( "gl_OML_subsample" ) )
            {
                OML_subsample = true;
                extensions.Remove( "glOML_subsample" );
            }
            if( extensions.Contains( "gl_OVR_multiview" ) )
            {
                OVR_multiview = true;
                extensions.Remove( "glOVR_multiview" );
            }
            if( extensions.Contains( "gl_OVR_multiview2" ) )
            {
                OVR_multiview2 = true;
                extensions.Remove( "glOVR_multiview2" );
            }
            if( extensions.Contains( "gl_PGI_misc_hints" ) )
            {
                PGI_misc_hints = true;
                extensions.Remove( "glPGI_misc_hints" );
            }
            if( extensions.Contains( "gl_PGI_vertex_hints" ) )
            {
                PGI_vertex_hints = true;
                extensions.Remove( "glPGI_vertex_hints" );
            }
            if( extensions.Contains( "gl_REND_screen_coordinates" ) )
            {
                REND_screen_coordinates = true;
                extensions.Remove( "glREND_screen_coordinates" );
            }
            if( extensions.Contains( "gl_S3_s3tc" ) )
            {
                S3_s3tc = true;
                extensions.Remove( "glS3_s3tc" );
            }
            if( extensions.Contains( "gl_SGIS_detail_texture" ) )
            {
                SGIS_detail_texture = true;
                extensions.Remove( "glSGIS_detail_texture" );
            }
            if( extensions.Contains( "gl_SGIS_fog_function" ) )
            {
                SGIS_fog_function = true;
                extensions.Remove( "glSGIS_fog_function" );
            }
            if( extensions.Contains( "gl_SGIS_generate_mipmap" ) )
            {
                SGIS_generate_mipmap = true;
                extensions.Remove( "glSGIS_generate_mipmap" );
            }
            if( extensions.Contains( "gl_SGIS_multisample" ) )
            {
                SGIS_multisample = true;
                extensions.Remove( "glSGIS_multisample" );
            }
            if( extensions.Contains( "gl_SGIS_pixel_texture" ) )
            {
                SGIS_pixel_texture = true;
                extensions.Remove( "glSGIS_pixel_texture" );
            }
            if( extensions.Contains( "gl_SGIS_point_line_texgen" ) )
            {
                SGIS_point_line_texgen = true;
                extensions.Remove( "glSGIS_point_line_texgen" );
            }
            if( extensions.Contains( "gl_SGIS_point_parameters" ) )
            {
                SGIS_point_parameters = true;
                extensions.Remove( "glSGIS_point_parameters" );
            }
            if( extensions.Contains( "gl_SGIS_sharpen_texture" ) )
            {
                SGIS_sharpen_texture = true;
                extensions.Remove( "glSGIS_sharpen_texture" );
            }
            if( extensions.Contains( "gl_SGIS_texture4D" ) )
            {
                SGIS_texture4D = true;
                extensions.Remove( "glSGIS_texture4D" );
            }
            if( extensions.Contains( "gl_SGIS_texture_border_clamp" ) )
            {
                SGIS_texture_border_clamp = true;
                extensions.Remove( "glSGIS_texture_border_clamp" );
            }
            if( extensions.Contains( "gl_SGIS_texture_color_mask" ) )
            {
                SGIS_texture_color_mask = true;
                extensions.Remove( "glSGIS_texture_color_mask" );
            }
            if( extensions.Contains( "gl_SGIS_texture_edge_clamp" ) )
            {
                SGIS_texture_edge_clamp = true;
                extensions.Remove( "glSGIS_texture_edge_clamp" );
            }
            if( extensions.Contains( "gl_SGIS_texture_filter4" ) )
            {
                SGIS_texture_filter4 = true;
                extensions.Remove( "glSGIS_texture_filter4" );
            }
            if( extensions.Contains( "gl_SGIS_texture_lod" ) )
            {
                SGIS_texture_lod = true;
                extensions.Remove( "glSGIS_texture_lod" );
            }
            if( extensions.Contains( "gl_SGIS_texture_select" ) )
            {
                SGIS_texture_select = true;
                extensions.Remove( "glSGIS_texture_select" );
            }
            if( extensions.Contains( "gl_SGIX_async" ) )
            {
                SGIX_async = true;
                extensions.Remove( "glSGIX_async" );
            }
            if( extensions.Contains( "gl_SGIX_async_histogram" ) )
            {
                SGIX_async_histogram = true;
                extensions.Remove( "glSGIX_async_histogram" );
            }
            if( extensions.Contains( "gl_SGIX_async_pixel" ) )
            {
                SGIX_async_pixel = true;
                extensions.Remove( "glSGIX_async_pixel" );
            }
            if( extensions.Contains( "gl_SGIX_blend_alpha_minmax" ) )
            {
                SGIX_blend_alpha_minmax = true;
                extensions.Remove( "glSGIX_blend_alpha_minmax" );
            }
            if( extensions.Contains( "gl_SGIX_calligraphic_fragment" ) )
            {
                SGIX_calligraphic_fragment = true;
                extensions.Remove( "glSGIX_calligraphic_fragment" );
            }
            if( extensions.Contains( "gl_SGIX_clipmap" ) )
            {
                SGIX_clipmap = true;
                extensions.Remove( "glSGIX_clipmap" );
            }
            if( extensions.Contains( "gl_SGIX_convolution_accuracy" ) )
            {
                SGIX_convolution_accuracy = true;
                extensions.Remove( "glSGIX_convolution_accuracy" );
            }
            if( extensions.Contains( "gl_SGIX_depth_pass_instrument" ) )
            {
                SGIX_depth_pass_instrument = true;
                extensions.Remove( "glSGIX_depth_pass_instrument" );
            }
            if( extensions.Contains( "gl_SGIX_depth_texture" ) )
            {
                SGIX_depth_texture = true;
                extensions.Remove( "glSGIX_depth_texture" );
            }
            if( extensions.Contains( "gl_SGIX_flush_raster" ) )
            {
                SGIX_flush_raster = true;
                extensions.Remove( "glSGIX_flush_raster" );
            }
            if( extensions.Contains( "gl_SGIX_fog_offset" ) )
            {
                SGIX_fog_offset = true;
                extensions.Remove( "glSGIX_fog_offset" );
            }
            if( extensions.Contains( "gl_SGIX_fragment_lighting" ) )
            {
                SGIX_fragment_lighting = true;
                extensions.Remove( "glSGIX_fragment_lighting" );
            }
            if( extensions.Contains( "gl_SGIX_framezoom" ) )
            {
                SGIX_framezoom = true;
                extensions.Remove( "glSGIX_framezoom" );
            }
            if( extensions.Contains( "gl_SGIX_igloo_interface" ) )
            {
                SGIX_igloo_interface = true;
                extensions.Remove( "glSGIX_igloo_interface" );
            }
            if( extensions.Contains( "gl_SGIX_instruments" ) )
            {
                SGIX_instruments = true;
                extensions.Remove( "glSGIX_instruments" );
            }
            if( extensions.Contains( "gl_SGIX_interlace" ) )
            {
                SGIX_interlace = true;
                extensions.Remove( "glSGIX_interlace" );
            }
            if( extensions.Contains( "gl_SGIX_ir_instrument1" ) )
            {
                SGIX_ir_instrument1 = true;
                extensions.Remove( "glSGIX_ir_instrument1" );
            }
            if( extensions.Contains( "gl_SGIX_list_priority" ) )
            {
                SGIX_list_priority = true;
                extensions.Remove( "glSGIX_list_priority" );
            }
            if( extensions.Contains( "gl_SGIX_pixel_texture" ) )
            {
                SGIX_pixel_texture = true;
                extensions.Remove( "glSGIX_pixel_texture" );
            }
            if( extensions.Contains( "gl_SGIX_pixel_tiles" ) )
            {
                SGIX_pixel_tiles = true;
                extensions.Remove( "glSGIX_pixel_tiles" );
            }
            if( extensions.Contains( "gl_SGIX_polynomial_ffd" ) )
            {
                SGIX_polynomial_ffd = true;
                extensions.Remove( "glSGIX_polynomial_ffd" );
            }
            if( extensions.Contains( "gl_SGIX_reference_plane" ) )
            {
                SGIX_reference_plane = true;
                extensions.Remove( "glSGIX_reference_plane" );
            }
            if( extensions.Contains( "gl_SGIX_resample" ) )
            {
                SGIX_resample = true;
                extensions.Remove( "glSGIX_resample" );
            }
            if( extensions.Contains( "gl_SGIX_scalebias_hint" ) )
            {
                SGIX_scalebias_hint = true;
                extensions.Remove( "glSGIX_scalebias_hint" );
            }
            if( extensions.Contains( "gl_SGIX_shadow" ) )
            {
                SGIX_shadow = true;
                extensions.Remove( "glSGIX_shadow" );
            }
            if( extensions.Contains( "gl_SGIX_shadow_ambient" ) )
            {
                SGIX_shadow_ambient = true;
                extensions.Remove( "glSGIX_shadow_ambient" );
            }
            if( extensions.Contains( "gl_SGIX_sprite" ) )
            {
                SGIX_sprite = true;
                extensions.Remove( "glSGIX_sprite" );
            }
            if( extensions.Contains( "gl_SGIX_subsample" ) )
            {
                SGIX_subsample = true;
                extensions.Remove( "glSGIX_subsample" );
            }
            if( extensions.Contains( "gl_SGIX_tag_sample_buffer" ) )
            {
                SGIX_tag_sample_buffer = true;
                extensions.Remove( "glSGIX_tag_sample_buffer" );
            }
            if( extensions.Contains( "gl_SGIX_texture_add_env" ) )
            {
                SGIX_texture_add_env = true;
                extensions.Remove( "glSGIX_texture_add_env" );
            }
            if( extensions.Contains( "gl_SGIX_texture_coordinate_clamp" ) )
            {
                SGIX_texture_coordinate_clamp = true;
                extensions.Remove( "glSGIX_texture_coordinate_clamp" );
            }
            if( extensions.Contains( "gl_SGIX_texture_lod_bias" ) )
            {
                SGIX_texture_lod_bias = true;
                extensions.Remove( "glSGIX_texture_lod_bias" );
            }
            if( extensions.Contains( "gl_SGIX_texture_multi_buffer" ) )
            {
                SGIX_texture_multi_buffer = true;
                extensions.Remove( "glSGIX_texture_multi_buffer" );
            }
            if( extensions.Contains( "gl_SGIX_texture_scale_bias" ) )
            {
                SGIX_texture_scale_bias = true;
                extensions.Remove( "glSGIX_texture_scale_bias" );
            }
            if( extensions.Contains( "gl_SGIX_vertex_preclip" ) )
            {
                SGIX_vertex_preclip = true;
                extensions.Remove( "glSGIX_vertex_preclip" );
            }
            if( extensions.Contains( "gl_SGIX_ycrcb" ) )
            {
                SGIX_ycrcb = true;
                extensions.Remove( "glSGIX_ycrcb" );
            }
            if( extensions.Contains( "gl_SGIX_ycrcb_subsample" ) )
            {
                SGIX_ycrcb_subsample = true;
                extensions.Remove( "glSGIX_ycrcb_subsample" );
            }
            if( extensions.Contains( "gl_SGIX_ycrcba" ) )
            {
                SGIX_ycrcba = true;
                extensions.Remove( "glSGIX_ycrcba" );
            }
            if( extensions.Contains( "gl_SGI_color_matrix" ) )
            {
                SGI_color_matrix = true;
                extensions.Remove( "glSGI_color_matrix" );
            }
            if( extensions.Contains( "gl_SGI_color_table" ) )
            {
                SGI_color_table = true;
                extensions.Remove( "glSGI_color_table" );
            }
            if( extensions.Contains( "gl_SGI_texture_color_table" ) )
            {
                SGI_texture_color_table = true;
                extensions.Remove( "glSGI_texture_color_table" );
            }
            if( extensions.Contains( "gl_SUNX_constant_data" ) )
            {
                SUNX_constant_data = true;
                extensions.Remove( "glSUNX_constant_data" );
            }
            if( extensions.Contains( "gl_SUN_convolution_border_modes" ) )
            {
                SUN_convolution_border_modes = true;
                extensions.Remove( "glSUN_convolution_border_modes" );
            }
            if( extensions.Contains( "gl_SUN_global_alpha" ) )
            {
                SUN_global_alpha = true;
                extensions.Remove( "glSUN_global_alpha" );
            }
            if( extensions.Contains( "gl_SUN_mesh_array" ) )
            {
                SUN_mesh_array = true;
                extensions.Remove( "glSUN_mesh_array" );
            }
            if( extensions.Contains( "gl_SUN_slice_accum" ) )
            {
                SUN_slice_accum = true;
                extensions.Remove( "glSUN_slice_accum" );
            }
            if( extensions.Contains( "gl_SUN_triangle_list" ) )
            {
                SUN_triangle_list = true;
                extensions.Remove( "glSUN_triangle_list" );
            }
            if( extensions.Contains( "gl_SUN_vertex" ) )
            {
                SUN_vertex = true;
                extensions.Remove( "glSUN_vertex" );
            }
            if( extensions.Contains( "gl_WIN_phong_shading" ) )
            {
                WIN_phong_shading = true;
                extensions.Remove( "glWIN_phong_shading" );
            }
            if( extensions.Contains( "gl_WIN_specular_fog" ) )
            {
                WIN_specular_fog = true;
                extensions.Remove( "glWIN_specular_fog" );
            }

            #endregion checkGLextensions
        }

        internal static void CheckCoreVersion( int majorVersion, int minorVersion )
        {
            if( majorVersion < 3 ) {
                throw new InvalidOperationException(
                    "StgSharp does not support OpenGL immediate mode." );
            }

            if( ( majorVersion >= 1 ) || ( ( majorVersion == 1 ) && ( minorVersion == 0 ) ) )
            {
                core10 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 1 ) || ( ( majorVersion == 1 ) && ( minorVersion == 1 ) ) )
            {
                core11 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 1 ) || ( ( majorVersion == 1 ) && ( minorVersion == 2 ) ) )
            {
                core12 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 1 ) || ( ( majorVersion == 1 ) && ( minorVersion == 3 ) ) )
            {
                core13 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 1 ) || ( ( majorVersion == 1 ) && ( minorVersion == 4 ) ) )
            {
                core14 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 1 ) || ( ( majorVersion == 1 ) && ( minorVersion == 5 ) ) )
            {
                core15 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 2 ) || ( ( majorVersion == 2 ) && ( minorVersion == 0 ) ) )
            {
                core20 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 2 ) || ( ( majorVersion == 2 ) && ( minorVersion == 1 ) ) )
            {
                core21 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 3 ) || ( ( majorVersion == 3 ) && ( minorVersion == 0 ) ) )
            {
                core30 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 3 ) || ( ( majorVersion == 3 ) && ( minorVersion == 1 ) ) )
            {
                core31 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 3 ) || ( ( majorVersion == 3 ) && ( minorVersion == 2 ) ) )
            {
                core32 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 3 ) || ( ( majorVersion == 3 ) && ( minorVersion == 3 ) ) )
            {
                core33 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 4 ) || ( ( majorVersion == 4 ) && ( minorVersion == 0 ) ) )
            {
                core40 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 4 ) || ( ( majorVersion == 4 ) && ( minorVersion == 1 ) ) )
            {
                core41 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 4 ) || ( ( majorVersion == 4 ) && ( minorVersion == 2 ) ) )
            {
                core42 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 4 ) || ( ( majorVersion == 4 ) && ( minorVersion == 3 ) ) )
            {
                core43 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 4 ) || ( ( majorVersion == 4 ) && ( minorVersion == 4 ) ) )
            {
                core44 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 4 ) || ( ( majorVersion == 4 ) && ( minorVersion == 5 ) ) )
            {
                core45 = true;
            } else
            {
                goto log;
            }

            if( ( majorVersion >= 4 ) || ( ( majorVersion == 4 ) && ( minorVersion == 6 ) ) )
            {
                core46 = true;
            } else
            {
                goto log;
            }

            log:
            {
                InternalIO.InternalWriteLog( "Find core OpenGL version.", LogType.Info );
                return;
            }
        }

        internal static unsafe string GetExtensions( this OpenglContext context )
        {
            if( context.glGetString == null ) {
                return string.Empty;
            }
            return Marshal.PtrToStringAnsi( context.glGetString( glExtension ) );
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        internal static T internalLoadAPI<T>( IntPtr ptr ) where T: Delegate
        {
            try
            {
                if( ptr == IntPtr.Zero ) {
                    return null;
                }
                T func = Marshal.GetDelegateForFunctionPointer<T>( ptr );
                return func;
            }
            catch( Exception ex )
            {
                InternalIO.InternalWriteLog(
                    $"{$"Failed to convert the api {typeof(T).Name}.\n"}{ex.Message}",
                    LogType.Warning );
                return default;
            }
        }

        internal static unsafe void LoadGLcore10(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core10 )
            {
                InternalIO.InternalAppendLog( "The core version 1.0 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBlendFunc = ( delegate*<uint, uint, void> )load( "glBlendFunc" );
            contextPtr->glClear = ( delegate*<uint, void> )load( "glClear" );
            contextPtr->glClearColor = ( delegate*<float, float, float, float, void> )load(
                "glClearColor" );
            contextPtr->glClearDepth = ( delegate*<double, void> )load( "glClearDepth" );
            contextPtr->glClearStencil = ( delegate*<int, void> )load( "glClearStencil" );
            contextPtr->glColorMask = ( delegate*<bool, bool, bool, bool, void> )load(
                "glColorMask" );
            contextPtr->glCullFace = ( delegate*<uint, void> )load( "glCullFace" );
            contextPtr->glDepthFunc = ( delegate*<uint, void> )load( "glDepthFunc" );
            contextPtr->glDepthMask = ( delegate*<bool, void> )load( "glDepthMask" );
            contextPtr->glDepthRange = ( delegate*<double, double, void> )load( "glDepthRange" );
            contextPtr->glDisable = ( delegate*<uint, void> )load( "glDisable" );
            contextPtr->glDrawBuffer = ( delegate*<uint, void> )load( "glDrawBuffer" );
            contextPtr->glEnable = ( delegate*<uint, void> )load( "glEnable" );
            contextPtr->glFinish = ( delegate*<void> )load( "glFinish" );
            contextPtr->glFlush = ( delegate*<void> )load( "glFlush" );
            contextPtr->glFrontFace = ( delegate*<uint, void> )load( "glFrontFace" );
            contextPtr->glGetBooleanv = ( delegate*<uint, bool*, void> )load( "glGetBooleanv" );
            contextPtr->glGetDoublev = ( delegate*<uint, double*, void> )load( "glGetDoublev" );
            contextPtr->glGetError = ( delegate*<uint> )load( "glGetError" );
            contextPtr->glGetFloatv = ( delegate*<uint, float*, void> )load( "glGetFloatv" );
            contextPtr->glGetIntegerv = ( delegate*<uint, int*, void> )load( "glGetIntegerv" );
            contextPtr->glGetString = ( delegate*<uint, IntPtr> )load( "glGetString" );
            contextPtr->glGetTexImage = ( delegate*<uint, int, uint, uint, void*, void> )load(
                "glGetTexImage" );
            contextPtr->glGetTexLevelParameterfv = ( delegate*<uint, int, uint, float*, void> )load(
                "glGetTexLevelParameterfv" );
            contextPtr->glGetTexLevelParameteriv = ( delegate*<uint, int, uint, int*, void> )load(
                "glGetTexLevelParameteriv" );
            contextPtr->glGetTexParameterfv = ( delegate*<uint, uint, float*, void> )load(
                "glGetTexParameterfv" );
            contextPtr->glGetTexParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetTexParameteriv" );
            contextPtr->glHint = ( delegate*<uint, uint, void> )load( "glHint" );
            contextPtr->glIsEnabled = ( delegate*<uint, bool> )load( "glIsEnabled" );
            contextPtr->glLineWidth = ( delegate*<float, void> )load( "glLineWidth" );
            contextPtr->glLogicOp = ( delegate*<uint, void> )load( "glLogicOp" );
            contextPtr->glPixelStoref = ( delegate*<uint, float, void> )load( "glPixelStoref" );
            contextPtr->glPixelStorei = ( delegate*<uint, int, void> )load( "glPixelStorei" );
            contextPtr->glPointSize = ( delegate*<float, void> )load( "glPointSize" );
            contextPtr->glPolygonMode = ( delegate*<uint, uint, void> )load( "glPolygonMode" );
            contextPtr->glReadBuffer = ( delegate*<uint, void> )load( "glReadBuffer" );
            contextPtr->glReadPixels = ( delegate*<int, int, int, int, uint, uint, void*, void> )load(
                "glReadPixels" );
            contextPtr->glScissor = ( delegate*<int, int, uint, uint, void> )load( "glScissor" );
            contextPtr->glStencilFunc = ( delegate*<uint, int, uint, void> )load( "glStencilFunc" );
            contextPtr->glStencilMask = ( delegate*<uint, void> )load( "glStencilMask" );
            contextPtr->glStencilOp = ( delegate*<uint, uint, uint, void> )load( "glStencilOp" );
            contextPtr->glTexImage1D = ( delegate*<uint, int, int, uint, int, uint, uint, void*, void> )load(
                "glTexImage1D" );
            contextPtr->glTexImage2D = ( delegate*<uint, int, uint, uint, uint, int, uint, uint, void*, void> )load(
                "glTexImage2D" );
            contextPtr->glTexParameterf = ( delegate*<uint, uint, float, void> )load(
                "glTexParameterf" );
            contextPtr->glTexParameterfv = ( delegate*<uint, uint, float*, void> )load(
                "glTexParameterfv" );
            contextPtr->glTexParameteri = ( delegate*<uint, uint, int, void> )load(
                "glTexParameteri" );
            contextPtr->glTexParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glTexParameteriv" );
            contextPtr->glViewport = ( delegate*<int, int, uint, uint, void> )load( "glViewport" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 1.0 APIs" );
        }

        internal static unsafe void LoadGLcore11(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core11 )
            {
                InternalIO.InternalAppendLog( "The core version 1.1 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBindTexture = ( delegate*<uint, uint, void> )load( "glBindTexture" );
            contextPtr->glCopyTexImage1D = ( delegate*<uint, int, uint, int, int, uint, int, void> )load(
                "glCopyTexImage1D" );
            contextPtr->glCopyTexImage2D = ( delegate*<uint, int, uint, int, int, uint, uint, int, void> )load(
                "glCopyTexImage2D" );
            contextPtr->glCopyTexSubImage1D = ( delegate*<uint, int, int, int, int, uint, void> )load(
                "glCopyTexSubImage1D" );
            contextPtr->glCopyTexSubImage2D = ( delegate*<uint, int, int, int, int, int, uint, uint, void> )load(
                "glCopyTexSubImage2D" );
            contextPtr->glDeleteTextures = ( delegate*<uint, uint*, void> )load(
                "glDeleteTextures" );
            contextPtr->glDrawArrays = ( delegate*<uint, int, uint, void> )load( "glDrawArrays" );
            contextPtr->glDrawElements = ( delegate*<uint, uint, uint, void*, void> )load(
                "glDrawElements" );
            contextPtr->glGenTextures = ( delegate*<int, uint*, void> )load( "glGenTextures" );
            contextPtr->glGetPointerv = ( delegate*<uint, void**, void> )load( "glGetPointerv" );
            contextPtr->glIsTexture = ( delegate*<uint, bool> )load( "glIsTexture" );
            contextPtr->glPolygonOffset = ( delegate*<float, float, void> )load( "glPolygonOffset" );
            contextPtr->glTexSubImage1D = ( delegate*<uint, int, int, uint, uint, uint, void*, void> )load(
                "glTexSubImage1D" );
            contextPtr->glTexSubImage2D = ( delegate*<uint, int, int, int, uint, uint, uint, uint, void*, void> )load(
                "glTexSubImage2D" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 1.1 APIs" );
        }

        internal static unsafe void LoadGLcore12(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core12 )
            {
                InternalIO.InternalAppendLog( "The core version 1.2 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glCopyTexSubImage3D = ( delegate*<uint, int, int, int, int, int, int, uint, uint, void> )load(
                "glCopyTexSubImage3D" );
            contextPtr->glDrawRangeElements = ( delegate*<uint, uint, uint, uint, uint, void*, void> )load(
                "glDrawRangeElements" );
            contextPtr->glTexImage3D = ( delegate*<uint, int, int, uint, uint, uint, int, uint, uint, void*, void> )load(
                "glTexImage3D" );
            contextPtr->glTexSubImage3D = ( delegate*<uint, int, int, int, int, uint, uint, uint, uint, uint, void*, void> )load(
                "glTexSubImage3D" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 1.2 APIs" );
        }

        internal static unsafe void LoadGLcore13(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core13 )
            {
                InternalIO.InternalAppendLog( "The core version 1.3 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glActiveTexture = ( delegate*<uint, void> )load( "glActiveTexture" );
            contextPtr->glCompressedTexImage1D = ( delegate*<uint, int, uint, uint, int, uint, void*, void> )load(
                "glCompressedTexImage1D" );
            contextPtr->glCompressedTexImage2D = ( delegate*<uint, int, uint, uint, uint, int, uint, void*, void> )load(
                "glCompressedTexImage2D" );
            contextPtr->glCompressedTexImage3D = ( delegate*<uint, int, uint, uint, uint, uint, int, uint, void*, void> )load(
                "glCompressedTexImage3D" );
            contextPtr->glCompressedTexSubImage1D = ( delegate*<uint, int, int, uint, uint, uint, void*, void> )load(
                "glCompressedTexSubImage1D" );
            contextPtr->glCompressedTexSubImage2D = ( delegate*<uint, int, int, int, uint, uint, uint, uint, void*, void> )load(
                "glCompressedTexSubImage2D" );
            contextPtr->glCompressedTexSubImage3D = ( delegate*<uint, int, int, int, int, uint, uint, uint, uint, uint, void*, void> )load(
                "glCompressedTexSubImage3D" );
            contextPtr->glGetCompressedTexImage = ( delegate*<uint, int, void*, void> )load(
                "glGetCompressedTexImage" );
            contextPtr->glSampleCoverage = ( delegate*<float, bool, void> )load(
                "glSampleCoverage" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 1.3 APIs" );
        }

        internal static unsafe void LoadGLcore14(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core14 )
            {
                InternalIO.InternalAppendLog( "The core version 1.4 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBlendColor = ( delegate*<float, float, float, float, void> )load(
                "glBlendColor" );
            contextPtr->glBlendEquation = ( delegate*<uint, void> )load( "glBlendEquation" );
            contextPtr->glBlendFuncSeparate = ( delegate*<uint, uint, uint, uint, void> )load(
                "glBlendFuncSeparate" );
            contextPtr->glMultiDrawArrays = ( delegate*<uint, int*, uint*, uint, void> )load(
                "glMultiDrawArrays" );
            contextPtr->glMultiDrawElements = ( delegate*<uint, uint*, uint, void*, void**, uint, void> )load(
                "glMultiDrawElements" );
            contextPtr->glPointParameterf = ( delegate*<uint, float, void> )load(
                "glPointParameterf" );
            contextPtr->glPointParameterfv = ( delegate*<uint, float*, void> )load(
                "glPointParameterfv" );
            contextPtr->glPointParameteri = ( delegate*<uint, int, void> )load(
                "glPointParameteri" );
            contextPtr->glPointParameteriv = ( delegate*<uint, int*, void> )load(
                "glPointParameteriv" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 1.4 APIs" );
        }

        internal static unsafe void LoadGLcore15(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core15 )
            {
                InternalIO.InternalAppendLog( "The core version 1.5 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBeginQuery = ( delegate*<uint, uint, void> )load( "glBeginQuery" );
            contextPtr->glBindBuffer = ( delegate*<uint, uint, void> )load( "glBindBuffer" );
            contextPtr->glBufferData = ( delegate*<uint, IntPtr, IntPtr, uint, void> )load(
                "glBufferData" );
            contextPtr->glBufferSubData = ( delegate*<uint, IntPtr, UIntPtr, void*, void> )load(
                "glBufferSubData" );
            contextPtr->glDeleteBuffers = ( delegate*<int, uint*, void> )load( "glDeleteBuffers" );
            contextPtr->glDeleteQueries = ( delegate*<uint, uint*, void> )load( "glDeleteQueries" );
            contextPtr->glEndQuery = ( delegate*<uint, void> )load( "glEndQuery" );
            contextPtr->glGenBuffers = ( delegate*<int, uint*, void> )load( "glGenBuffers" );
            contextPtr->glGenQueries = ( delegate*<uint, uint*, void> )load( "glGenQueries" );
            contextPtr->glGetBufferParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetBufferParameteriv" );
            contextPtr->glGetBufferPointerv = ( delegate*<uint, uint, void**, void> )load(
                "glGetBufferPointerv" );
            contextPtr->glGetBufferSubData = ( delegate*<uint, IntPtr, UIntPtr, void*, void> )load(
                "glGetBufferSubData" );
            contextPtr->glGetQueryObjectiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetQueryObjectiv" );
            contextPtr->glGetQueryObjectuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glGetQueryObjectuiv" );
            contextPtr->glGetQueryiv = ( delegate*<uint, uint, int*, void> )load( "glGetQueryiv" );
            contextPtr->glIsBuffer = ( delegate*<uint, bool> )load( "glIsBuffer" );
            contextPtr->glIsQuery = ( delegate*<uint, bool> )load( "glIsQuery" );
            contextPtr->glMapBuffer = ( delegate*<uint, uint, void*> )load( "glMapBuffer" );
            contextPtr->glUnmapBuffer = ( delegate*<uint, bool> )load( "glUnmapBuffer" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 1.5 APIs" );
        }

        internal static unsafe void LoadGLcore20(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core20 )
            {
                InternalIO.InternalAppendLog( "The core version 2.0 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glAttachShader = ( delegate*<uint, uint, void> )load( "glAttachShader" );
            contextPtr->glBindAttribLocation = ( delegate*<uint, uint, byte*, void> )load(
                "glBindAttribLocation" );
            contextPtr->glBlendEquationSeparate = ( delegate*<uint, uint, void> )load(
                "glBlendEquationSeparate" );
            contextPtr->glCompileShader = ( delegate*<uint, void> )load( "glCompileShader" );
            contextPtr->glCreateProgram = ( delegate*<uint> )load( "glCreateProgram" );
            contextPtr->glCreateShader = ( delegate*<uint, uint> )load( "glCreateShader" );
            contextPtr->glDeleteProgram = ( delegate*<uint, void> )load( "glDeleteProgram" );
            contextPtr->glDeleteShader = ( delegate*<uint, void> )load( "glDeleteShader" );
            contextPtr->glDetachShader = ( delegate*<uint, uint, void> )load( "glDetachShader" );
            contextPtr->glDisableVertexAttribArray = ( delegate*<uint, void> )load(
                "glDisableVertexAttribArray" );
            contextPtr->glDrawBuffers = ( delegate*<uint, uint*, void> )load( "glDrawBuffers" );
            contextPtr->glEnableVertexAttribArray = ( delegate*<uint, void> )load(
                "glEnableVertexAttribArray" );
            contextPtr->glGetActiveAttrib = ( delegate*<uint, uint, uint, uint*, int*, uint*, byte*, void> )load(
                "glGetActiveAttrib" );
            contextPtr->glGetActiveUniform = ( delegate*<uint, uint, uint, uint*, int*, uint*, byte*, void> )load(
                "glGetActiveUniform" );
            contextPtr->glGetAttachedShaders = ( delegate*<uint, uint, uint*, uint*, void> )load(
                "glGetAttachedShaders" );
            contextPtr->glGetAttribLocation = ( delegate*<uint, byte*, int> )load(
                "glGetAttribLocation" );
            contextPtr->glGetProgramInfoLog = ( delegate*<uint, uint, uint*, byte*, void> )load(
                "glGetProgramInfoLog" );
            contextPtr->glGetProgramiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetProgramiv" );
            contextPtr->glGetShaderInfoLog = ( delegate*<uint, uint, uint*, byte*, void> )load(
                "glGetShaderInfoLog" );
            contextPtr->glGetShaderSource = ( delegate*<uint, uint, uint*, byte*, void> )load(
                "glGetShaderSource" );
            contextPtr->glGetShaderiv = ( delegate*<uint, uint, int*, void> )load( "glGetShaderiv" );
            contextPtr->glGetUniformLocation = ( delegate*<uint, byte*, int> )load(
                "glGetUniformLocation" );
            contextPtr->glGetUniformfv = ( delegate*<uint, int, float*, void> )load(
                "glGetUniformfv" );
            contextPtr->glGetUniformiv = ( delegate*<uint, int, int*, void> )load(
                "glGetUniformiv" );
            contextPtr->glGetVertexAttribPointerv = ( delegate*<uint, uint, void**, void> )load(
                "glGetVertexAttribPointerv" );
            contextPtr->glGetVertexAttribdv = ( delegate*<uint, uint, double*, void> )load(
                "glGetVertexAttribdv" );
            contextPtr->glGetVertexAttribfv = ( delegate*<uint, uint, float*, void> )load(
                "glGetVertexAttribfv" );
            contextPtr->glGetVertexAttribiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetVertexAttribiv" );
            contextPtr->glIsProgram = ( delegate*<uint, bool> )load( "glIsProgram" );
            contextPtr->glIsShader = ( delegate*<uint, bool> )load( "glIsShader" );
            contextPtr->glLinkProgram = ( delegate*<uint, void> )load( "glLinkProgram" );
            contextPtr->glShaderSource = ( delegate* unmanaged[Stdcall]<uint, uint, byte**, void*, void> )load(
                "glShaderSource" );
            contextPtr->glStencilFuncSeparate = ( delegate*<uint, uint, int, uint, void> )load(
                "glStencilFuncSeparate" );
            contextPtr->glStencilMaskSeparate = ( delegate*<uint, uint, void> )load(
                "glStencilMaskSeparate" );
            contextPtr->glStencilOpSeparate = ( delegate*<uint, uint, uint, uint, void> )load(
                "glStencilOpSeparate" );
            contextPtr->glUniform1f = ( delegate*<int, float, void> )load( "glUniform1f" );
            contextPtr->glUniform1fv = ( delegate*<int, uint, M128*, void> )load( "glUniform1fv" );
            contextPtr->glUniform1i = ( delegate*<int, int, void> )load( "glUniform1i" );
            contextPtr->glUniform1iv = ( delegate*<int, uint, int*, void> )load( "glUniform1iv" );
            contextPtr->glUniform2f = ( delegate*<int, float, float, void> )load( "glUniform2f" );
            contextPtr->glUniform2fv = ( delegate*<int, uint, float*, void> )load( "glUniform2fv" );
            contextPtr->glUniform2i = ( delegate*<int, int, int, void> )load( "glUniform2i" );
            contextPtr->glUniform2iv = ( delegate*<int, uint, int*, void> )load( "glUniform2iv" );
            contextPtr->glUniform3f = ( delegate*<int, float, float, float, void> )load(
                "glUniform3f" );
            contextPtr->glUniform3fv = ( delegate*<int, uint, float*, void> )load( "glUniform3fv" );
            contextPtr->glUniform3i = ( delegate*<int, int, int, int, void> )load( "glUniform3i" );
            contextPtr->glUniform3iv = ( delegate*<int, uint, int*, void> )load( "glUniform3iv" );
            contextPtr->glUniform4f = ( delegate*<int, float, float, float, float, void> )load(
                "glUniform4f" );
            contextPtr->glUniform4fv = ( delegate*<int, uint, float*, void> )load( "glUniform4fv" );
            contextPtr->glUniform4i = ( delegate*<int, int, int, int, int, void> )load(
                "glUniform4i" );
            contextPtr->glUniform4iv = ( delegate*<int, uint, int*, void> )load( "glUniform4iv" );
            contextPtr->glUniformMatrix2fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix2fv" );
            contextPtr->glUniformMatrix3fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix3fv" );
            contextPtr->glUniformMatrix4fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix4fv" );
            contextPtr->glUseProgram = ( delegate*<uint, void> )load( "glUseProgram" );
            contextPtr->glValidateProgram = ( delegate*<uint, void> )load( "glValidateProgram" );
            contextPtr->glVertexAttrib1d = ( delegate*<uint, double, void> )load(
                "glVertexAttrib1d" );
            contextPtr->glVertexAttrib1dv = ( delegate*<uint, double*, void> )load(
                "glVertexAttrib1dv" );
            contextPtr->glVertexAttrib1f = ( delegate*<uint, float, void> )load(
                "glVertexAttrib1f" );
            contextPtr->glVertexAttrib1fv = ( delegate*<uint, float*, void> )load(
                "glVertexAttrib1fv" );
            contextPtr->glVertexAttrib1s = ( delegate*<uint, short, void> )load(
                "glVertexAttrib1s" );
            contextPtr->glVertexAttrib1sv = ( delegate*<uint, short*, void> )load(
                "glVertexAttrib1sv" );
            contextPtr->glVertexAttrib2d = ( delegate*<uint, double, double, void> )load(
                "glVertexAttrib2d" );
            contextPtr->glVertexAttrib2dv = ( delegate*<uint, double*, void> )load(
                "glVertexAttrib2dv" );
            contextPtr->glVertexAttrib2f = ( delegate*<uint, float, float, void> )load(
                "glVertexAttrib2f" );
            contextPtr->glVertexAttrib2fv = ( delegate*<uint, float*, void> )load(
                "glVertexAttrib2fv" );
            contextPtr->glVertexAttrib2s = ( delegate*<uint, short, short, void> )load(
                "glVertexAttrib2s" );
            contextPtr->glVertexAttrib2sv = ( delegate*<uint, short*, void> )load(
                "glVertexAttrib2sv" );
            contextPtr->glVertexAttrib3d = ( delegate*<uint, double, double, double, void> )load(
                "glVertexAttrib3d" );
            contextPtr->glVertexAttrib3dv = ( delegate*<uint, double*, void> )load(
                "glVertexAttrib3dv" );
            contextPtr->glVertexAttrib3f = ( delegate*<uint, float, float, float, void> )load(
                "glVertexAttrib3f" );
            contextPtr->glVertexAttrib3fv = ( delegate*<uint, float*, void> )load(
                "glVertexAttrib3fv" );
            contextPtr->glVertexAttrib3s = ( delegate*<uint, short, short, short, void> )load(
                "glVertexAttrib3s" );
            contextPtr->glVertexAttrib3sv = ( delegate*<uint, short*, void> )load(
                "glVertexAttrib3sv" );
            contextPtr->glVertexAttrib4Nbv = ( delegate*<uint, sbyte*, void> )load(
                "glVertexAttrib4Nbv" );
            contextPtr->glVertexAttrib4Niv = ( delegate*<uint, int*, void> )load(
                "glVertexAttrib4Niv" );
            contextPtr->glVertexAttrib4Nsv = ( delegate*<uint, short*, void> )load(
                "glVertexAttrib4Nsv" );
            contextPtr->glVertexAttrib4Nub = ( delegate*<uint, byte, byte, byte, byte, void> )load(
                "glVertexAttrib4Nub" );
            contextPtr->glVertexAttrib4Nubv = ( delegate*<uint, byte*, void> )load(
                "glVertexAttrib4Nubv" );
            contextPtr->glVertexAttrib4Nuiv = ( delegate*<uint, uint*, void> )load(
                "glVertexAttrib4Nuiv" );
            contextPtr->glVertexAttrib4Nusv = ( delegate*<uint, ushort*, void> )load(
                "glVertexAttrib4Nusv" );
            contextPtr->glVertexAttrib4bv = ( delegate*<uint, sbyte*, void> )load(
                "glVertexAttrib4bv" );
            contextPtr->glVertexAttrib4d = ( delegate*<uint, double, double, double, double, void> )load(
                "glVertexAttrib4d" );
            contextPtr->glVertexAttrib4dv = ( delegate*<uint, double*, void> )load(
                "glVertexAttrib4dv" );
            contextPtr->glVertexAttrib4f = ( delegate*<uint, float, float, float, float, void> )load(
                "glVertexAttrib4f" );
            contextPtr->glVertexAttrib4fv = ( delegate*<uint, float*, void> )load(
                "glVertexAttrib4fv" );
            contextPtr->glVertexAttrib4iv = ( delegate*<uint, int*, void> )load(
                "glVertexAttrib4iv" );
            contextPtr->glVertexAttrib4s = ( delegate*<uint, short, short, short, short, void> )load(
                "glVertexAttrib4s" );
            contextPtr->glVertexAttrib4sv = ( delegate*<uint, short*, void> )load(
                "glVertexAttrib4sv" );
            contextPtr->glVertexAttrib4ubv = ( delegate*<uint, byte*, void> )load(
                "glVertexAttrib4ubv" );
            contextPtr->glVertexAttrib4uiv = ( delegate*<uint, uint*, void> )load(
                "glVertexAttrib4uiv" );
            contextPtr->glVertexAttrib4usv = ( delegate*<uint, ushort*, void> )load(
                "glVertexAttrib4usv" );
            contextPtr->glVertexAttribPointer = ( delegate*<uint, int, uint, int, uint, void*, void> )load(
                "glVertexAttribPointer" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 2.0 APIs" );
        }

        internal static unsafe void LoadGLcore21(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core21 )
            {
                InternalIO.InternalAppendLog( "The core version 2.1 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glUniformMatrix2x3fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix2x3fv" );
            contextPtr->glUniformMatrix2x4fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix2x4fv" );
            contextPtr->glUniformMatrix3x2fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix3x2fv" );
            contextPtr->glUniformMatrix3x4fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix3x4fv" );
            contextPtr->glUniformMatrix4x2fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix4x2fv" );
            contextPtr->glUniformMatrix4x3fv = ( delegate*<int, uint, bool, float*, void> )load(
                "glUniformMatrix4x3fv" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 2.1 APIs" );
        }

        internal static unsafe void LoadGLcore30(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core30 )
            {
                InternalIO.InternalAppendLog( "The core version 3.0 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBeginConditionalRender = ( delegate*<uint, uint, void> )load(
                "glBeginConditionalRender" );
            contextPtr->glBeginTransformFeedback = ( delegate*<uint, void> )load(
                "glBeginTransformFeedback" );
            contextPtr->glBindBufferBase = ( delegate*<uint, uint, uint, void> )load(
                "glBindBufferBase" );
            contextPtr->glBindBufferRange = ( delegate*<uint, uint, uint, IntPtr, UIntPtr, void> )load(
                "glBindBufferRange" );
            contextPtr->glBindFragDataLocation = ( delegate*<uint, uint, byte*, void> )load(
                "glBindFragDataLocation" );
            contextPtr->glBindFramebuffer = ( delegate*<uint, uint, void> )load(
                "glBindFramebuffer" );
            contextPtr->glBindRenderbuffer = ( delegate*<uint, uint, void> )load(
                "glBindRenderbuffer" );
            contextPtr->glBindVertexArray = ( delegate*<uint, void> )load( "glBindVertexArray" );
            contextPtr->glBlitFramebuffer = ( delegate*<int, int, int, int, int, int, int, int, uint, uint, void> )load(
                "glBlitFramebuffer" );
            contextPtr->glCheckFramebufferStatus = ( delegate*<uint, uint> )load(
                "glCheckFramebufferStatus" );
            contextPtr->glClampColor = ( delegate*<uint, uint, void> )load( "glClampColor" );
            contextPtr->glClearBufferfi = ( delegate*<uint, int, float, int, void> )load(
                "glClearBufferfi" );
            contextPtr->glClearBufferfv = ( delegate*<uint, int, float*, void> )load(
                "glClearBufferfv" );
            contextPtr->glClearBufferiv = ( delegate*<uint, int, int*, void> )load(
                "glClearBufferiv" );
            contextPtr->glClearBufferuiv = ( delegate*<uint, int, uint*, void> )load(
                "glClearBufferuiv" );
            contextPtr->glColorMaski = ( delegate*<uint, bool, bool, bool, bool, void> )load(
                "glColorMaski" );
            contextPtr->glDeleteFramebuffers = ( delegate*<uint, uint*, void> )load(
                "glDeleteFramebuffers" );
            contextPtr->glDeleteRenderbuffers = ( delegate*<uint, uint*, void> )load(
                "glDeleteRenderbuffers" );
            contextPtr->glDeleteVertexArrays = ( delegate*<int, uint*, void> )load(
                "glDeleteVertexArrays" );
            contextPtr->glDisablei = ( delegate*<uint, uint, void> )load( "glDisablei" );
            contextPtr->glEnablei = ( delegate*<uint, uint, void> )load( "glEnablei" );
            contextPtr->glEndConditionalRender = ( delegate*<void> )load( "glEndConditionalRender" );
            contextPtr->glEndTransformFeedback = ( delegate*<void> )load( "glEndTransformFeedback" );
            contextPtr->glFlushMappedBufferRange = ( delegate*<uint, IntPtr, UIntPtr, void> )load(
                "glFlushMappedBufferRange" );
            contextPtr->glFramebufferRenderbuffer = ( delegate*<uint, uint, uint, uint, void> )load(
                "glFramebufferRenderbuffer" );
            contextPtr->glFramebufferTexture1D = ( delegate*<uint, uint, uint, uint, int, void> )load(
                "glFramebufferTexture1D" );
            contextPtr->glFramebufferTexture2D = ( delegate*<uint, uint, uint, uint, int, void> )load(
                "glFramebufferTexture2D" );
            contextPtr->glFramebufferTexture3D = ( delegate*<uint, uint, uint, uint, int, int, void> )load(
                "glFramebufferTexture3D" );
            contextPtr->glFramebufferTextureLayer = ( delegate*<uint, uint, uint, int, int, void> )load(
                "glFramebufferTextureLayer" );
            contextPtr->glGenFramebuffers = ( delegate*<uint, uint*, void> )load(
                "glGenFramebuffers" );
            contextPtr->glGenRenderbuffers = ( delegate*<int, uint*, void> )load(
                "glGenRenderbuffers" );
            contextPtr->glGenVertexArrays = ( delegate*<int, uint*, void> )load(
                "glGenVertexArrays" );
            contextPtr->glGenerateMipmap = ( delegate*<uint, void> )load( "glGenerateMipmap" );
            contextPtr->glGetBooleani_v = ( delegate*<uint, uint, bool*, void> )load(
                "glGetBooleani_v" );
            contextPtr->glGetFragDataLocation = ( delegate*<uint, byte*, int> )load(
                "glGetFragDataLocation" );
            contextPtr->glGetFramebufferAttachmentParameteriv = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetFramebufferAttachmentParameteriv" );
            contextPtr->glGetIntegeri_v = ( delegate*<uint, uint, int*, void> )load(
                "glGetIntegeri_v" );
            contextPtr->glGetRenderbufferParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetRenderbufferParameteriv" );
            contextPtr->glGetStringi = ( delegate*<uint, uint, byte*> )load( "glGetStringi" );
            contextPtr->glGetTexParameterIiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetTexParameterIiv" );
            contextPtr->glGetTexParameterIuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glGetTexParameterIuiv" );
            contextPtr->glGetTransformFeedbackVarying = ( delegate*<uint, uint, uint, uint*, uint*, uint*, byte*, void> )load(
                "glGetTransformFeedbackVarying" );
            contextPtr->glGetUniformuiv = ( delegate*<uint, int, uint*, void> )load(
                "glGetUniformuiv" );
            contextPtr->glGetVertexAttribIiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetVertexAttribIiv" );
            contextPtr->glGetVertexAttribIuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glGetVertexAttribIuiv" );
            contextPtr->glIsEnabledi = ( delegate*<uint, uint, bool> )load( "glIsEnabledi" );
            contextPtr->glIsFramebuffer = ( delegate*<uint, bool> )load( "glIsFramebuffer" );
            contextPtr->glIsRenderbuffer = ( delegate*<uint, bool> )load( "glIsRenderbuffer" );
            contextPtr->glIsVertexArray = ( delegate*<uint, bool> )load( "glIsVertexArray" );
            contextPtr->glMapBufferRange = ( delegate*<uint, IntPtr, UIntPtr, uint, void*> )load(
                "glMapBufferRange" );
            contextPtr->glRenderbufferStorage = ( delegate*<uint, uint, int, int, void> )load(
                "glRenderbufferStorage" );
            contextPtr->glRenderbufferStorageMultisample = ( delegate*<uint, uint, uint, uint, uint, void> )load(
                "glRenderbufferStorageMultisample" );
            contextPtr->glTexParameterIiv = ( delegate*<uint, uint, int*, void> )load(
                "glTexParameterIiv" );
            contextPtr->glTexParameterIuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glTexParameterIuiv" );
            contextPtr->glTransformFeedbackVaryings = ( delegate*<uint, uint, byte*, byte*, uint, void> )load(
                "glTransformFeedbackVaryings" );
            contextPtr->glUniform1ui = ( delegate*<int, uint, void> )load( "glUniform1ui" );
            contextPtr->glUniform1uiv = ( delegate*<int, uint, uint*, void> )load( "glUniform1uiv" );
            contextPtr->glUniform2ui = ( delegate*<int, uint, uint, void> )load( "glUniform2ui" );
            contextPtr->glUniform2uiv = ( delegate*<int, uint, uint*, void> )load( "glUniform2uiv" );
            contextPtr->glUniform3ui = ( delegate*<int, uint, uint, uint, void> )load(
                "glUniform3ui" );
            contextPtr->glUniform3uiv = ( delegate*<int, uint, uint*, void> )load( "glUniform3uiv" );
            contextPtr->glUniform4ui = ( delegate*<int, uint, uint, uint, uint, void> )load(
                "glUniform4ui" );
            contextPtr->glUniform4uiv = ( delegate*<int, uint, uint*, void> )load( "glUniform4uiv" );
            contextPtr->glVertexAttribI1i = ( delegate*<uint, int, void> )load(
                "glVertexAttribI1i" );
            contextPtr->glVertexAttribI1iv = ( delegate*<uint, int*, void> )load(
                "glVertexAttribI1iv" );
            contextPtr->glVertexAttribI1ui = ( delegate*<uint, uint, void> )load(
                "glVertexAttribI1ui" );
            contextPtr->glVertexAttribI1uiv = ( delegate*<uint, uint*, void> )load(
                "glVertexAttribI1uiv" );
            contextPtr->glVertexAttribI2i = ( delegate*<uint, int, int, void> )load(
                "glVertexAttribI2i" );
            contextPtr->glVertexAttribI2iv = ( delegate*<uint, int*, void> )load(
                "glVertexAttribI2iv" );
            contextPtr->glVertexAttribI2ui = ( delegate*<uint, uint, uint, void> )load(
                "glVertexAttribI2ui" );
            contextPtr->glVertexAttribI2uiv = ( delegate*<uint, uint*, void> )load(
                "glVertexAttribI2uiv" );
            contextPtr->glVertexAttribI3i = ( delegate*<uint, int, int, int, void> )load(
                "glVertexAttribI3i" );
            contextPtr->glVertexAttribI3iv = ( delegate*<uint, int*, void> )load(
                "glVertexAttribI3iv" );
            contextPtr->glVertexAttribI3ui = ( delegate*<uint, uint, uint, uint, void> )load(
                "glVertexAttribI3ui" );
            contextPtr->glVertexAttribI3uiv = ( delegate*<uint, uint*, void> )load(
                "glVertexAttribI3uiv" );
            contextPtr->glVertexAttribI4bv = ( delegate*<uint, sbyte*, void> )load(
                "glVertexAttribI4bv" );
            contextPtr->glVertexAttribI4i = ( delegate*<uint, int, int, int, int, void> )load(
                "glVertexAttribI4i" );
            contextPtr->glVertexAttribI4iv = ( delegate*<uint, int*, void> )load(
                "glVertexAttribI4iv" );
            contextPtr->glVertexAttribI4sv = ( delegate*<uint, short*, void> )load(
                "glVertexAttribI4sv" );
            contextPtr->glVertexAttribI4ubv = ( delegate*<uint, byte*, void> )load(
                "glVertexAttribI4ubv" );
            contextPtr->glVertexAttribI4ui = ( delegate*<uint, uint, uint, uint, uint, void> )load(
                "glVertexAttribI4ui" );
            contextPtr->glVertexAttribI4uiv = ( delegate*<uint, uint*, void> )load(
                "glVertexAttribI4uiv" );
            contextPtr->glVertexAttribI4usv = ( delegate*<uint, ushort*, void> )load(
                "glVertexAttribI4usv" );
            contextPtr->glVertexAttribIPointer = ( delegate*<uint, int, uint, uint, void*, void> )load(
                "glVertexAttribIPointer" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 3.0 APIs" );
        }

        internal static unsafe void LoadGLcore31(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core31 )
            {
                InternalIO.InternalAppendLog( "The core version 3.1 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBindBufferBase = ( delegate*<uint, uint, uint, void> )load(
                "glBindBufferBase" );
            contextPtr->glBindBufferRange = ( delegate*<uint, uint, uint, IntPtr, UIntPtr, void> )load(
                "glBindBufferRange" );
            contextPtr->glCopyBufferSubData = ( delegate*<uint, uint, IntPtr, IntPtr, UIntPtr, void> )load(
                "glCopyBufferSubData" );
            contextPtr->glDrawArraysInstanced = ( delegate*<uint, int, uint, uint, void> )load(
                "glDrawArraysInstanced" );
            contextPtr->glDrawElementsInstanced = ( delegate*<uint, uint, uint, void*, uint, void> )load(
                "glDrawElementsInstanced" );
            contextPtr->glGetActiveUniformBlockName = ( delegate*<uint, uint, uint, uint*, byte*, void> )load(
                "glGetActiveUniformBlockName" );
            contextPtr->glGetActiveUniformBlockiv = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetActiveUniformBlockiv" );
            contextPtr->glGetActiveUniformName = ( delegate*<uint, uint, uint, uint*, byte*, void> )load(
                "glGetActiveUniformName" );
            contextPtr->glGetActiveUniformsiv = ( delegate*<uint, uint, uint*, uint, int*, void> )load(
                "glGetActiveUniformsiv" );
            contextPtr->glGetIntegeri_v = ( delegate*<uint, uint, int*, void> )load(
                "glGetIntegeri_v" );
            contextPtr->glGetUniformBlockIndex = ( delegate*<uint, byte*, uint> )load(
                "glGetUniformBlockIndex" );
            contextPtr->glGetUniformIndices = ( delegate*<uint, uint, byte*, char**, uint*, void> )load(
                "glGetUniformIndices" );
            contextPtr->glPrimitiveRestartIndex = ( delegate*<uint, void> )load(
                "glPrimitiveRestartIndex" );
            contextPtr->glTexBuffer = ( delegate*<uint, uint, uint, void> )load( "glTexBuffer" );
            contextPtr->glUniformBlockBinding = ( delegate*<uint, uint, uint, void> )load(
                "glUniformBlockBinding" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 3.1 APIs" );
        }

        internal static unsafe void LoadGLcore32(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core32 )
            {
                InternalIO.InternalAppendLog( "The core version 3.2 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glClientWaitSync = ( delegate*<GLsync, uint, ulong, uint> )load(
                "glClientWaitSync" );
            contextPtr->glDeleteSync = ( delegate*<GLsync, void> )load( "glDeleteSync" );
            contextPtr->glDrawElementsBaseVertex = ( delegate*<uint, uint, uint, void*, int, void> )load(
                "glDrawElementsBaseVertex" );
            contextPtr->glDrawElementsInstancedBaseVertex = ( delegate*<uint, uint, uint, void*, uint, int, void> )load(
                "glDrawElementsInstancedBaseVertex" );
            contextPtr->glDrawRangeElementsBaseVertex = ( delegate*<uint, uint, uint, uint, uint, void*, int, void> )load(
                "glDrawRangeElementsBaseVertex" );
            contextPtr->glFenceSync = ( delegate*<uint, uint, GLsync> )load( "glFenceSync" );
            contextPtr->glFramebufferTexture = ( delegate*<uint, uint, uint, int, void> )load(
                "glFramebufferTexture" );
            contextPtr->glGetBufferParameteri64v = ( delegate*<uint, uint, long*, void> )load(
                "glGetBufferParameteri64v" );
            contextPtr->glGetInteger64i_v = ( delegate*<uint, uint, long*, void> )load(
                "glGetInteger64i_v" );
            contextPtr->glGetInteger64v = ( delegate*<uint, long*, void> )load( "glGetInteger64v" );
            contextPtr->glGetMultisamplefv = ( delegate*<uint, uint, float*, void> )load(
                "glGetMultisamplefv" );
            contextPtr->glGetSynciv = ( delegate*<GLsync, uint, uint, uint*, int*, void> )load(
                "glGetSynciv" );
            contextPtr->glIsSync = ( delegate*<GLsync, bool> )load( "glIsSync" );
            contextPtr->glMultiDrawElementsBaseVertex = ( delegate*<uint, uint*, uint, void*, void**, uint, int*, void> )load(
                "glMultiDrawElementsBaseVertex" );
            contextPtr->glProvokingVertex = ( delegate*<uint, void> )load( "glProvokingVertex" );
            contextPtr->glSampleMaski = ( delegate*<uint, uint, void> )load( "glSampleMaski" );
            contextPtr->glTexImage2DMultisample = ( delegate*<uint, uint, uint, uint, uint, bool, void> )load(
                "glTexImage2DMultisample" );
            contextPtr->glTexImage3DMultisample = ( delegate*<uint, uint, uint, uint, uint, uint, bool, void> )load(
                "glTexImage3DMultisample" );
            contextPtr->glWaitSync = ( delegate*<GLsync, uint, ulong, void> )load( "glWaitSync" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 3.2 APIs" );
        }

        internal static unsafe void LoadGLcore33(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core33 )
            {
                InternalIO.InternalAppendLog( "The core version 3.3 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBindFragDataLocationIndexed = ( delegate*<uint, uint, uint, byte*, void> )load(
                "glBindFragDataLocationIndexed" );
            contextPtr->glBindSampler = ( delegate*<uint, uint, void> )load( "glBindSampler" );
            contextPtr->glDeleteSamplers = ( delegate*<uint, uint*, void> )load(
                "glDeleteSamplers" );
            contextPtr->glGenSamplers = ( delegate*<uint, uint*, void> )load( "glGenSamplers" );
            contextPtr->glGetFragDataIndex = ( delegate*<uint, byte*, int> )load(
                "glGetFragDataIndex" );
            contextPtr->glGetQueryObjecti64v = ( delegate*<uint, uint, long*, void> )load(
                "glGetQueryObjecti64v" );
            contextPtr->glGetQueryObjectui64v = ( delegate*<uint, uint, ulong*, void> )load(
                "glGetQueryObjectui64v" );
            contextPtr->glGetSamplerParameterIiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetSamplerParameterIiv" );
            contextPtr->glGetSamplerParameterIuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glGetSamplerParameterIuiv" );
            contextPtr->glGetSamplerParameterfv = ( delegate*<uint, uint, float*, void> )load(
                "glGetSamplerParameterfv" );
            contextPtr->glGetSamplerParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetSamplerParameteriv" );
            contextPtr->glIsSampler = ( delegate*<uint, bool> )load( "glIsSampler" );
            contextPtr->glQueryCounter = ( delegate*<uint, uint, void> )load( "glQueryCounter" );
            contextPtr->glSamplerParameterIiv = ( delegate*<uint, uint, int*, void> )load(
                "glSamplerParameterIiv" );
            contextPtr->glSamplerParameterIuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glSamplerParameterIuiv" );
            contextPtr->glSamplerParameterf = ( delegate*<uint, uint, float, void> )load(
                "glSamplerParameterf" );
            contextPtr->glSamplerParameterfv = ( delegate*<uint, uint, float*, void> )load(
                "glSamplerParameterfv" );
            contextPtr->glSamplerParameteri = ( delegate*<uint, uint, int, void> )load(
                "glSamplerParameteri" );
            contextPtr->glSamplerParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glSamplerParameteriv" );
            contextPtr->glVertexAttribDivisor = ( delegate*<uint, uint, void> )load(
                "glVertexAttribDivisor" );
            contextPtr->glVertexAttribP1ui = ( delegate*<uint, uint, bool, uint, void> )load(
                "glVertexAttribP1ui" );
            contextPtr->glVertexAttribP1uiv = ( delegate*<uint, uint, bool, uint*, void> )load(
                "glVertexAttribP1uiv" );
            contextPtr->glVertexAttribP2ui = ( delegate*<uint, uint, bool, uint, void> )load(
                "glVertexAttribP2ui" );
            contextPtr->glVertexAttribP2uiv = ( delegate*<uint, uint, bool, uint*, void> )load(
                "glVertexAttribP2uiv" );
            contextPtr->glVertexAttribP3ui = ( delegate*<uint, uint, bool, uint, void> )load(
                "glVertexAttribP3ui" );
            contextPtr->glVertexAttribP3uiv = ( delegate*<uint, uint, bool, uint*, void> )load(
                "glVertexAttribP3uiv" );
            contextPtr->glVertexAttribP4ui = ( delegate*<uint, uint, bool, uint, void> )load(
                "glVertexAttribP4ui" );
            contextPtr->glVertexAttribP4uiv = ( delegate*<uint, uint, bool, uint*, void> )load(
                "glVertexAttribP4uiv" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 3.3 APIs" );
        }

        internal static unsafe void LoadGLcore40(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core40 )
            {
                InternalIO.InternalAppendLog( "The core version 4.0 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBeginQueryIndexed = ( delegate*<uint, uint, uint, void> )load(
                "glBeginQueryIndexed" );
            contextPtr->glBindTransformFeedback = ( delegate*<uint, uint, void> )load(
                "glBindTransformFeedback" );
            contextPtr->glBlendEquationSeparatei = ( delegate*<uint, uint, uint, void> )load(
                "glBlendEquationSeparatei" );
            contextPtr->glBlendEquationi = ( delegate*<uint, uint, void> )load( "glBlendEquationi" );
            contextPtr->glBlendFuncSeparatei = ( delegate*<uint, uint, uint, uint, uint, void> )load(
                "glBlendFuncSeparatei" );
            contextPtr->glBlendFunci = ( delegate*<uint, uint, uint, void> )load( "glBlendFunci" );
            contextPtr->glDeleteTransformFeedbacks = ( delegate*<uint, uint*, void> )load(
                "glDeleteTransformFeedbacks" );
            contextPtr->glDrawArraysIndirect = ( delegate*<uint, void*, void> )load(
                "glDrawArraysIndirect" );
            contextPtr->glDrawElementsIndirect = ( delegate*<uint, uint, void*, void> )load(
                "glDrawElementsIndirect" );
            contextPtr->glDrawTransformFeedback = ( delegate*<uint, uint, void> )load(
                "glDrawTransformFeedback" );
            contextPtr->glDrawTransformFeedbackStream = ( delegate*<uint, uint, uint, void> )load(
                "glDrawTransformFeedbackStream" );
            contextPtr->glEndQueryIndexed = ( delegate*<uint, uint, void> )load(
                "glEndQueryIndexed" );
            contextPtr->glGenTransformFeedbacks = ( delegate*<uint, uint*, void> )load(
                "glGenTransformFeedbacks" );
            contextPtr->glGetActiveSubroutineName = ( delegate*<uint, uint, uint, uint, uint*, byte*, void> )load(
                "glGetActiveSubroutineName" );
            contextPtr->glGetActiveSubroutineUniformName = ( delegate*<uint, uint, uint, uint, uint*, byte*, void> )load(
                "glGetActiveSubroutineUniformName" );
            contextPtr->glGetActiveSubroutineUniformiv = ( delegate*<uint, uint, uint, uint, int*, void> )load(
                "glGetActiveSubroutineUniformiv" );
            contextPtr->glGetProgramStageiv = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetProgramStageiv" );
            contextPtr->glGetQueryIndexediv = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetQueryIndexediv" );
            contextPtr->glGetSubroutineIndex = ( delegate*<uint, uint, byte*, uint> )load(
                "glGetSubroutineIndex" );
            contextPtr->glGetSubroutineUniformLocation = ( delegate*<uint, uint, byte*, int> )load(
                "glGetSubroutineUniformLocation" );
            contextPtr->glGetUniformSubroutineuiv = ( delegate*<uint, int, uint*, void> )load(
                "glGetUniformSubroutineuiv" );
            contextPtr->glGetUniformdv = ( delegate*<uint, int, double*, void> )load(
                "glGetUniformdv" );
            contextPtr->glIsTransformFeedback = ( delegate*<uint, bool> )load(
                "glIsTransformFeedback" );
            contextPtr->glMinSampleShading = ( delegate*<float, void> )load( "glMinSampleShading" );
            contextPtr->glPatchParameterfv = ( delegate*<uint, float*, void> )load(
                "glPatchParameterfv" );
            contextPtr->glPatchParameteri = ( delegate*<uint, int, void> )load(
                "glPatchParameteri" );
            contextPtr->glPauseTransformFeedback = ( delegate*<void> )load(
                "glPauseTransformFeedback" );
            contextPtr->glResumeTransformFeedback = ( delegate*<void> )load(
                "glResumeTransformFeedback" );
            contextPtr->glUniform1d = ( delegate*<int, double, void> )load( "glUniform1d" );
            contextPtr->glUniform1dv = ( delegate*<int, uint, double*, void> )load( "glUniform1dv" );
            contextPtr->glUniform2d = ( delegate*<int, double, double, void> )load( "glUniform2d" );
            contextPtr->glUniform2dv = ( delegate*<int, uint, double*, void> )load( "glUniform2dv" );
            contextPtr->glUniform3d = ( delegate*<int, double, double, double, void> )load(
                "glUniform3d" );
            contextPtr->glUniform3dv = ( delegate*<int, uint, double*, void> )load( "glUniform3dv" );
            contextPtr->glUniform4d = ( delegate*<int, double, double, double, double, void> )load(
                "glUniform4d" );
            contextPtr->glUniform4dv = ( delegate*<int, uint, double*, void> )load( "glUniform4dv" );
            contextPtr->glUniformMatrix2dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix2dv" );
            contextPtr->glUniformMatrix2x3dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix2x3dv" );
            contextPtr->glUniformMatrix2x4dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix2x4dv" );
            contextPtr->glUniformMatrix3dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix3dv" );
            contextPtr->glUniformMatrix3x2dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix3x2dv" );
            contextPtr->glUniformMatrix3x4dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix3x4dv" );
            contextPtr->glUniformMatrix4dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix4dv" );
            contextPtr->glUniformMatrix4x2dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix4x2dv" );
            contextPtr->glUniformMatrix4x3dv = ( delegate*<int, uint, bool, double*, void> )load(
                "glUniformMatrix4x3dv" );
            contextPtr->glUniformSubroutinesuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glUniformSubroutinesuiv" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 4.0 APIs" );
        }

        internal static unsafe void LoadGLcore41(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core41 )
            {
                InternalIO.InternalAppendLog( "The core version 4.1 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glActiveShaderProgram = ( delegate*<uint, uint, void> )load(
                "glActiveShaderProgram" );
            contextPtr->glBindProgramPipeline = ( delegate*<uint, void> )load(
                "glBindProgramPipeline" );
            contextPtr->glClearDepthf = ( delegate*<float, void> )load( "glClearDepthf" );
            contextPtr->glCreateShaderProgramv = ( delegate*<uint, uint, byte*, uint> )load(
                "glCreateShaderProgramv" );
            contextPtr->glDeleteProgramPipelines = ( delegate*<uint, uint*, void> )load(
                "glDeleteProgramPipelines" );
            contextPtr->glDepthRangeArrayv = ( delegate*<uint, uint, double*, void> )load(
                "glDepthRangeArrayv" );
            contextPtr->glDepthRangeIndexed = ( delegate*<uint, double, double, void> )load(
                "glDepthRangeIndexed" );
            contextPtr->glDepthRangef = ( delegate*<float, float, void> )load( "glDepthRangef" );
            contextPtr->glGenProgramPipelines = ( delegate*<uint, uint*, void> )load(
                "glGenProgramPipelines" );
            contextPtr->glGetDoublei_v = ( delegate*<uint, uint, double*, void> )load(
                "glGetDoublei_v" );
            contextPtr->glGetFloati_v = ( delegate*<uint, uint, float*, void> )load(
                "glGetFloati_v" );
            contextPtr->glGetProgramBinary = ( delegate*<uint, uint, uint*, uint*, void*, void> )load(
                "glGetProgramBinary" );
            contextPtr->glGetProgramPipelineInfoLog = ( delegate*<uint, uint, uint*, byte*, void> )load(
                "glGetProgramPipelineInfoLog" );
            contextPtr->glGetProgramPipelineiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetProgramPipelineiv" );
            contextPtr->glGetShaderPrecisionFormat = ( delegate*<uint, uint, int*, int*, void> )load(
                "glGetShaderPrecisionFormat" );
            contextPtr->glGetVertexAttribLdv = ( delegate*<uint, uint, double*, void> )load(
                "glGetVertexAttribLdv" );
            contextPtr->glIsProgramPipeline = ( delegate*<uint, bool> )load( "glIsProgramPipeline" );
            contextPtr->glProgramBinary = ( delegate*<uint, uint, void*, uint, void> )load(
                "glProgramBinary" );
            contextPtr->glProgramParameteri = ( delegate*<uint, uint, int, void> )load(
                "glProgramParameteri" );
            contextPtr->glProgramUniform1d = ( delegate*<uint, int, double, void> )load(
                "glProgramUniform1d" );
            contextPtr->glProgramUniform1dv = ( delegate*<uint, int, uint, double*, void> )load(
                "glProgramUniform1dv" );
            contextPtr->glProgramUniform1f = ( delegate*<uint, int, float, void> )load(
                "glProgramUniform1f" );
            contextPtr->glProgramUniform1fv = ( delegate*<uint, int, uint, float*, void> )load(
                "glProgramUniform1fv" );
            contextPtr->glProgramUniform1i = ( delegate*<uint, int, int, void> )load(
                "glProgramUniform1i" );
            contextPtr->glProgramUniform1iv = ( delegate*<uint, int, uint, int*, void> )load(
                "glProgramUniform1iv" );
            contextPtr->glProgramUniform1ui = ( delegate*<uint, int, uint, void> )load(
                "glProgramUniform1ui" );
            contextPtr->glProgramUniform1uiv = ( delegate*<uint, int, uint, uint*, void> )load(
                "glProgramUniform1uiv" );
            contextPtr->glProgramUniform2d = ( delegate*<uint, int, double, double, void> )load(
                "glProgramUniform2d" );
            contextPtr->glProgramUniform2dv = ( delegate*<uint, int, uint, double*, void> )load(
                "glProgramUniform2dv" );
            contextPtr->glProgramUniform2f = ( delegate*<uint, int, float, float, void> )load(
                "glProgramUniform2f" );
            contextPtr->glProgramUniform2fv = ( delegate*<uint, int, uint, float*, void> )load(
                "glProgramUniform2fv" );
            contextPtr->glProgramUniform2i = ( delegate*<uint, int, int, int, void> )load(
                "glProgramUniform2i" );
            contextPtr->glProgramUniform2iv = ( delegate*<uint, int, uint, int*, void> )load(
                "glProgramUniform2iv" );
            contextPtr->glProgramUniform2ui = ( delegate*<uint, int, uint, uint, void> )load(
                "glProgramUniform2ui" );
            contextPtr->glProgramUniform2uiv = ( delegate*<uint, int, uint, uint*, void> )load(
                "glProgramUniform2uiv" );
            contextPtr->glProgramUniform3d = ( delegate*<uint, int, double, double, double, void> )load(
                "glProgramUniform3d" );
            contextPtr->glProgramUniform3dv = ( delegate*<uint, int, uint, double*, void> )load(
                "glProgramUniform3dv" );
            contextPtr->glProgramUniform3f = ( delegate*<uint, int, float, float, float, void> )load(
                "glProgramUniform3f" );
            contextPtr->glProgramUniform3fv = ( delegate*<uint, int, uint, float*, void> )load(
                "glProgramUniform3fv" );
            contextPtr->glProgramUniform3i = ( delegate*<uint, int, int, int, int, void> )load(
                "glProgramUniform3i" );
            contextPtr->glProgramUniform3iv = ( delegate*<uint, int, uint, int*, void> )load(
                "glProgramUniform3iv" );
            contextPtr->glProgramUniform3ui = ( delegate*<uint, int, uint, uint, uint, void> )load(
                "glProgramUniform3ui" );
            contextPtr->glProgramUniform3uiv = ( delegate*<uint, int, uint, uint*, void> )load(
                "glProgramUniform3uiv" );
            contextPtr->glProgramUniform4d = ( delegate*<uint, int, double, double, double, double, void> )load(
                "glProgramUniform4d" );
            contextPtr->glProgramUniform4dv = ( delegate*<uint, int, uint, double*, void> )load(
                "glProgramUniform4dv" );
            contextPtr->glProgramUniform4f = ( delegate*<uint, int, float, float, float, float, void> )load(
                "glProgramUniform4f" );
            contextPtr->glProgramUniform4fv = ( delegate*<uint, int, uint, float*, void> )load(
                "glProgramUniform4fv" );
            contextPtr->glProgramUniform4i = ( delegate*<uint, int, int, int, int, int, void> )load(
                "glProgramUniform4i" );
            contextPtr->glProgramUniform4iv = ( delegate*<uint, int, uint, int*, void> )load(
                "glProgramUniform4iv" );
            contextPtr->glProgramUniform4ui = ( delegate*<uint, int, uint, uint, uint, uint, void> )load(
                "glProgramUniform4ui" );
            contextPtr->glProgramUniform4uiv = ( delegate*<uint, int, uint, uint*, void> )load(
                "glProgramUniform4uiv" );
            contextPtr->glProgramUniformMatrix2dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix2dv" );
            contextPtr->glProgramUniformMatrix2fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix2fv" );
            contextPtr->glProgramUniformMatrix2x3dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix2x3dv" );
            contextPtr->glProgramUniformMatrix2x3fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix2x3fv" );
            contextPtr->glProgramUniformMatrix2x4dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix2x4dv" );
            contextPtr->glProgramUniformMatrix2x4fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix2x4fv" );
            contextPtr->glProgramUniformMatrix3dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix3dv" );
            contextPtr->glProgramUniformMatrix3fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix3fv" );
            contextPtr->glProgramUniformMatrix3x2dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix3x2dv" );
            contextPtr->glProgramUniformMatrix3x2fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix3x2fv" );
            contextPtr->glProgramUniformMatrix3x4dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix3x4dv" );
            contextPtr->glProgramUniformMatrix3x4fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix3x4fv" );
            contextPtr->glProgramUniformMatrix4dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix4dv" );
            contextPtr->glProgramUniformMatrix4fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix4fv" );
            contextPtr->glProgramUniformMatrix4x2dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix4x2dv" );
            contextPtr->glProgramUniformMatrix4x2fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix4x2fv" );
            contextPtr->glProgramUniformMatrix4x3dv = ( delegate*<uint, int, uint, bool, double*, void> )load(
                "glProgramUniformMatrix4x3dv" );
            contextPtr->glProgramUniformMatrix4x3fv = ( delegate*<uint, int, uint, bool, float*, void> )load(
                "glProgramUniformMatrix4x3fv" );
            contextPtr->glReleaseShaderCompiler = ( delegate*<void> )load(
                "glReleaseShaderCompiler" );
            contextPtr->glScissorArrayv = ( delegate*<uint, uint, int*, void> )load(
                "glScissorArrayv" );
            contextPtr->glScissorIndexed = ( delegate*<uint, int, int, uint, uint, void> )load(
                "glScissorIndexed" );
            contextPtr->glScissorIndexedv = ( delegate*<uint, int*, void> )load(
                "glScissorIndexedv" );
            contextPtr->glShaderBinary = ( delegate*<uint, uint*, uint, void*, uint, void> )load(
                "glShaderBinary" );
            contextPtr->glUseProgramStages = ( delegate*<uint, uint, uint, void> )load(
                "glUseProgramStages" );
            contextPtr->glValidateProgramPipeline = ( delegate*<uint, void> )load(
                "glValidateProgramPipeline" );
            contextPtr->glVertexAttribL1d = ( delegate*<uint, double, void> )load(
                "glVertexAttribL1d" );
            contextPtr->glVertexAttribL1dv = ( delegate*<uint, double*, void> )load(
                "glVertexAttribL1dv" );
            contextPtr->glVertexAttribL2d = ( delegate*<uint, double, double, void> )load(
                "glVertexAttribL2d" );
            contextPtr->glVertexAttribL2dv = ( delegate*<uint, double*, void> )load(
                "glVertexAttribL2dv" );
            contextPtr->glVertexAttribL3d = ( delegate*<uint, double, double, double, void> )load(
                "glVertexAttribL3d" );
            contextPtr->glVertexAttribL3dv = ( delegate*<uint, double*, void> )load(
                "glVertexAttribL3dv" );
            contextPtr->glVertexAttribL4d = ( delegate*<uint, double, double, double, double, void> )load(
                "glVertexAttribL4d" );
            contextPtr->glVertexAttribL4dv = ( delegate*<uint, double*, void> )load(
                "glVertexAttribL4dv" );
            contextPtr->glVertexAttribLPointer = ( delegate*<uint, int, uint, uint, void*, void> )load(
                "glVertexAttribLPointer" );
            contextPtr->glViewportArrayv = ( delegate*<uint, uint, float*, void> )load(
                "glViewportArrayv" );
            contextPtr->glViewportIndexedf = ( delegate*<uint, float, float, float, float, void> )load(
                "glViewportIndexedf" );
            contextPtr->glViewportIndexedfv = ( delegate*<uint, float*, void> )load(
                "glViewportIndexedfv" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 4.1 APIs" );
        }

        internal static unsafe void LoadGLcore42(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core42 )
            {
                InternalIO.InternalAppendLog( "The core version 4.2 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBindImageTexture = ( delegate*<uint, uint, int, bool, int, uint, uint, void> )load(
                "glBindImageTexture" );
            contextPtr->glDrawArraysInstancedBaseInstance = ( delegate*<uint, int, uint, uint, uint, void> )load(
                "glDrawArraysInstancedBaseInstance" );
            contextPtr->glDrawElementsInstancedBaseInstance = ( delegate*<uint, uint, uint, void*, uint, uint, void> )load(
                "glDrawElementsInstancedBaseInstance" );
            contextPtr->glDrawElementsInstancedBaseVertexBaseInstance = ( delegate*<uint, uint, uint, void*, uint, int, uint, void> )load(
                "glDrawElementsInstancedBaseVertexBaseInstance" );
            contextPtr->glDrawTransformFeedbackInstanced = ( delegate*<uint, uint, uint, void> )load(
                "glDrawTransformFeedbackInstanced" );
            contextPtr->glDrawTransformFeedbackStreamInstanced = ( delegate*<uint, uint, uint, uint, void> )load(
                "glDrawTransformFeedbackStreamInstanced" );
            contextPtr->glGetActiveAtomicCounterBufferiv = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetActiveAtomicCounterBufferiv" );
            contextPtr->glGetInternalformativ = ( delegate*<uint, uint, uint, uint, int*, void> )load(
                "glGetInternalformativ" );
            contextPtr->glMemoryBarrier = ( delegate*<uint, void> )load( "glMemoryBarrier" );
            contextPtr->glTexStorage1D = ( delegate*<uint, uint, uint, uint, void> )load(
                "glTexStorage1D" );
            contextPtr->glTexStorage2D = ( delegate*<uint, uint, uint, uint, uint, void> )load(
                "glTexStorage2D" );
            contextPtr->glTexStorage3D = ( delegate*<uint, uint, uint, uint, uint, uint, void> )load(
                "glTexStorage3D" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 4.2 APIs" );
        }

        internal static unsafe void LoadGLcore43(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core43 )
            {
                InternalIO.InternalAppendLog( "The core version 4.3 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBindVertexBuffer = ( delegate*<uint, uint, IntPtr, uint, void> )load(
                "glBindVertexBuffer" );
            contextPtr->glClearBufferData = ( delegate*<uint, uint, uint, uint, void*, void> )load(
                "glClearBufferData" );
            contextPtr->glClearBufferSubData = ( delegate*<uint, uint, IntPtr, UIntPtr, uint, uint, void*, void> )load(
                "glClearBufferSubData" );
            contextPtr->glCopyImageSubData = ( delegate*<uint, uint, int, int, int, int, uint, uint, int, int, int, int, uint, uint, uint, void> )load(
                "glCopyImageSubData" );
            contextPtr->glDebugMessageCallback = ( delegate*<GLDEBUGPROC, void*, void> )load(
                "glDebugMessageCallback" );
            contextPtr->glDebugMessageControl = ( delegate*<uint, uint, uint, uint, uint*, bool, void> )load(
                "glDebugMessageControl" );
            contextPtr->glDebugMessageInsert = ( delegate*<uint, uint, uint, uint, uint, byte*, void> )load(
                "glDebugMessageInsert" );
            contextPtr->glDispatchCompute = ( delegate*<uint, uint, uint, void> )load(
                "glDispatchCompute" );
            contextPtr->glDispatchComputeIndirect = ( delegate*<IntPtr, void> )load(
                "glDispatchComputeIndirect" );
            contextPtr->glFramebufferParameteri = ( delegate*<uint, uint, int, void> )load(
                "glFramebufferParameteri" );
            contextPtr->glGetDebugMessageLog = ( delegate*<uint, uint, uint*, uint*, uint*, uint*, uint*, byte*, uint> )load(
                "glGetDebugMessageLog" );
            contextPtr->glGetFramebufferParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetFramebufferParameteriv" );
            contextPtr->glGetInternalformati64v = ( delegate*<uint, uint, uint, uint, long*, void> )load(
                "glGetInternalformati64v" );
            contextPtr->glGetObjectLabel = ( delegate*<uint, uint, uint, uint*, byte*, void> )load(
                "glGetObjectLabel" );
            contextPtr->glGetObjectPtrLabel = ( delegate*<void*, uint, uint*, byte*, void> )load(
                "glGetObjectPtrLabel" );
            contextPtr->glGetPointerv = ( delegate*<uint, void**, void> )load( "glGetPointerv" );
            contextPtr->glGetProgramInterfaceiv = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetProgramInterfaceiv" );
            contextPtr->glGetProgramResourceIndex = ( delegate*<uint, uint, byte*, uint> )load(
                "glGetProgramResourceIndex" );
            contextPtr->glGetProgramResourceLocation = ( delegate*<uint, uint, byte*, int> )load(
                "glGetProgramResourceLocation" );
            contextPtr->glGetProgramResourceLocationIndex = ( delegate*<uint, uint, byte*, int> )load(
                "glGetProgramResourceLocationIndex" );
            contextPtr->glGetProgramResourceName = ( delegate*<uint, uint, uint, uint, uint*, byte*, void> )load(
                "glGetProgramResourceName" );
            contextPtr->glGetProgramResourceiv = ( delegate*<uint, uint, uint, uint, uint*, uint, uint*, int*, void> )load(
                "glGetProgramResourceiv" );
            contextPtr->glInvalidateBufferData = ( delegate*<uint, void> )load(
                "glInvalidateBufferData" );
            contextPtr->glInvalidateBufferSubData = ( delegate*<uint, IntPtr, UIntPtr, void> )load(
                "glInvalidateBufferSubData" );
            contextPtr->glInvalidateFramebuffer = ( delegate*<uint, uint, uint*, void> )load(
                "glInvalidateFramebuffer" );
            contextPtr->glInvalidateSubFramebuffer = ( delegate*<uint, uint, uint*, int, int, uint, uint, void> )load(
                "glInvalidateSubFramebuffer" );
            contextPtr->glInvalidateTexImage = ( delegate*<uint, int, void> )load(
                "glInvalidateTexImage" );
            contextPtr->glInvalidateTexSubImage = ( delegate*<uint, int, int, int, int, uint, uint, uint, void> )load(
                "glInvalidateTexSubImage" );
            contextPtr->glMultiDrawArraysIndirect = ( delegate*<uint, void*, uint, uint, void> )load(
                "glMultiDrawArraysIndirect" );
            contextPtr->glMultiDrawElementsIndirect = ( delegate*<uint, uint, void*, uint, uint, void> )load(
                "glMultiDrawElementsIndirect" );
            contextPtr->glObjectLabel = ( delegate*<uint, uint, uint, byte*, void> )load(
                "glObjectLabel" );
            contextPtr->glObjectPtrLabel = ( delegate*<void*, uint, byte*, void> )load(
                "glObjectPtrLabel" );
            contextPtr->glPopDebugGroup = ( delegate*<void> )load( "glPopDebugGroup" );
            contextPtr->glPushDebugGroup = ( delegate*<uint, uint, uint, byte*, void> )load(
                "glPushDebugGroup" );
            contextPtr->glShaderStorageBlockBinding = ( delegate*<uint, uint, uint, void> )load(
                "glShaderStorageBlockBinding" );
            contextPtr->glTexBufferRange = ( delegate*<uint, uint, uint, IntPtr, UIntPtr, void> )load(
                "glTexBufferRange" );
            contextPtr->glTexStorage2DMultisample = ( delegate*<uint, uint, uint, uint, uint, bool, void> )load(
                "glTexStorage2DMultisample" );
            contextPtr->glTexStorage3DMultisample = ( delegate*<uint, uint, uint, uint, uint, uint, bool, void> )load(
                "glTexStorage3DMultisample" );
            contextPtr->glTextureView = ( delegate*<uint, uint, uint, uint, uint, uint, uint, uint, void> )load(
                "glTextureView" );
            contextPtr->glVertexAttribBinding = ( delegate*<uint, uint, void> )load(
                "glVertexAttribBinding" );
            contextPtr->glVertexAttribFormat = ( delegate*<uint, int, uint, bool, uint, void> )load(
                "glVertexAttribFormat" );
            contextPtr->glVertexAttribIFormat = ( delegate*<uint, int, uint, uint, void> )load(
                "glVertexAttribIFormat" );
            contextPtr->glClearBufferData = ( delegate*<uint, uint, uint, uint, void*, void> )load(
                "glClearBufferData" );
            contextPtr->glVertexBindingDivisor = ( delegate*<uint, uint, void> )load(
                "glVertexBindingDivisor" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 4.3 APIs" );
        }

        internal static unsafe void LoadGLcore44(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core44 )
            {
                InternalIO.InternalAppendLog( "The core version 4.4 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBindBuffersBase = ( delegate*<uint, uint, uint, uint*, void> )load(
                "glBindBuffersBase" );
            contextPtr->glBindBuffersRange = ( delegate*<uint, uint, uint, uint*, IntPtr*, UIntPtr*, void> )load(
                "glBindBuffersRange" );
            contextPtr->glBindImageTextures = ( delegate*<uint, uint, uint*, void> )load(
                "glBindImageTextures" );
            contextPtr->glBindSamplers = ( delegate*<uint, uint, uint*, void> )load(
                "glBindSamplers" );
            contextPtr->glBindTextures = ( delegate*<uint, uint, uint*, void> )load(
                "glBindTextures" );
            contextPtr->glBindVertexBuffers = ( delegate*<uint, uint, uint*, IntPtr*, uint*, void> )load(
                "glBindVertexBuffers" );
            contextPtr->glBufferStorage = ( delegate*<uint, UIntPtr, void*, uint, void> )load(
                "glBufferStorage" );
            contextPtr->glClearTexImage = ( delegate*<uint, int, uint, uint, void*, void> )load(
                "glClearTexImage" );
            contextPtr->glClearTexSubImage = ( delegate*<uint, int, int, int, int, uint, uint, uint, uint, uint, void*, void> )load(
                "glClearTexSubImage" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 4.4 APIs" );
        }

        internal static unsafe void LoadGLcore45(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core45 )
            {
                InternalIO.InternalAppendLog( "The core version 4.5 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glBindTextureUnit = ( delegate*<uint, uint, void> )load(
                "glBindTextureUnit" );
            contextPtr->glBlitNamedFramebuffer = ( delegate*<uint, uint, int, int, int, int, int, int, int, int, uint, uint, void> )load(
                "glBlitNamedFramebuffer" );
            contextPtr->glCheckNamedFramebufferStatus = ( delegate*<uint, uint, uint> )load(
                "glCheckNamedFramebufferStatus" );
            contextPtr->glClearNamedBufferData = ( delegate*<uint, uint, uint, uint, void*, void> )load(
                "glClearNamedBufferData" );
            contextPtr->glClearNamedBufferSubData = ( delegate*<uint, uint, IntPtr, UIntPtr, uint, uint, void*, void> )load(
                "glClearNamedBufferSubData" );
            contextPtr->glClearNamedFramebufferfi = ( delegate*<uint, uint, int, float, int, void> )load(
                "glClearNamedFramebufferfi" );
            contextPtr->glClearNamedFramebufferfv = ( delegate*<uint, uint, int, float*, void> )load(
                "glClearNamedFramebufferfv" );
            contextPtr->glClearNamedFramebufferiv = ( delegate*<uint, uint, int, int*, void> )load(
                "glClearNamedFramebufferiv" );
            contextPtr->glClearNamedFramebufferuiv = ( delegate*<uint, uint, int, uint*, void> )load(
                "glClearNamedFramebufferuiv" );
            contextPtr->glClipControl = ( delegate*<uint, uint, void> )load( "glClipControl" );
            contextPtr->glCompressedTextureSubImage1D = ( delegate*<uint, int, int, uint, uint, uint, void*, void> )load(
                "glCompressedTextureSubImage1D" );
            contextPtr->glCompressedTextureSubImage2D = ( delegate*<uint, int, int, int, uint, uint, uint, uint, void*, void> )load(
                "glCompressedTextureSubImage2D" );
            contextPtr->glCompressedTextureSubImage3D = ( delegate*<uint, int, int, int, int, uint, uint, uint, uint, uint, void*, void> )load(
                "glCompressedTextureSubImage3D" );
            contextPtr->glCopyNamedBufferSubData = ( delegate*<uint, uint, IntPtr, IntPtr, UIntPtr, void> )load(
                "glCopyNamedBufferSubData" );
            contextPtr->glCopyTextureSubImage1D = ( delegate*<uint, int, int, int, int, uint, void> )load(
                "glCopyTextureSubImage1D" );
            contextPtr->glCopyTextureSubImage2D = ( delegate*<uint, int, int, int, int, int, uint, uint, void> )load(
                "glCopyTextureSubImage2D" );
            contextPtr->glCopyTextureSubImage3D = ( delegate*<uint, int, int, int, int, int, int, uint, uint, void> )load(
                "glCopyTextureSubImage3D" );
            contextPtr->glCreateBuffers = ( delegate*<uint, uint*, void> )load( "glCreateBuffers" );
            contextPtr->glCreateFramebuffers = ( delegate*<uint, uint*, void> )load(
                "glCreateFramebuffers" );
            contextPtr->glCreateProgramPipelines = ( delegate*<uint, uint*, void> )load(
                "glCreateProgramPipelines" );
            contextPtr->glCreateQueries = ( delegate*<uint, uint, uint*, void> )load(
                "glCreateQueries" );
            contextPtr->glCreateRenderbuffers = ( delegate*<uint, uint*, void> )load(
                "glCreateRenderbuffers" );
            contextPtr->glCreateSamplers = ( delegate*<uint, uint*, void> )load(
                "glCreateSamplers" );
            contextPtr->glCreateTextures = ( delegate*<uint, uint, uint*, void> )load(
                "glCreateTextures" );
            contextPtr->glCreateTransformFeedbacks = ( delegate*<uint, uint*, void> )load(
                "glCreateTransformFeedbacks" );
            contextPtr->glCreateVertexArrays = ( delegate*<uint, uint*, void> )load(
                "glCreateVertexArrays" );
            contextPtr->glDisableVertexArrayAttrib = ( delegate*<uint, uint, void> )load(
                "glDisableVertexArrayAttrib" );
            contextPtr->glEnableVertexArrayAttrib = ( delegate*<uint, uint, void> )load(
                "glEnableVertexArrayAttrib" );
            contextPtr->glFlushMappedNamedBufferRange = ( delegate*<uint, IntPtr, UIntPtr, void> )load(
                "glFlushMappedNamedBufferRange" );
            contextPtr->glGenerateTextureMipmap = ( delegate*<uint, void> )load(
                "glGenerateTextureMipmap" );
            contextPtr->glGetCompressedTextureImage = ( delegate*<uint, int, uint, void*, void> )load(
                "glGetCompressedTextureImage" );
            contextPtr->glGetCompressedTextureSubImage = ( delegate*<uint, int, int, int, int, uint, uint, uint, uint, void*, void> )load(
                "glGetCompressedTextureSubImage" );
            contextPtr->glGetGraphicsResetStatus = ( delegate*<uint> )load(
                "glGetGraphicsResetStatus" );
            contextPtr->glGetNamedBufferParameteri64v = ( delegate*<uint, uint, long*, void> )load(
                "glGetNamedBufferParameteri64v" );
            contextPtr->glGetNamedBufferParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetNamedBufferParameteriv" );
            contextPtr->glGetNamedBufferPointerv = ( delegate*<uint, uint, void**, void> )load(
                "glGetNamedBufferPointerv" );
            contextPtr->glGetNamedBufferSubData = ( delegate*<uint, IntPtr, UIntPtr, void*, void> )load(
                "glGetNamedBufferSubData" );
            contextPtr->glGetNamedFramebufferAttachmentParameteriv = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetNamedFramebufferAttachmentParameteriv" );
            contextPtr->glGetNamedFramebufferParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetNamedFramebufferParameteriv" );
            contextPtr->glGetNamedRenderbufferParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetNamedRenderbufferParameteriv" );
            contextPtr->glGetQueryBufferObjecti64v = ( delegate*<uint, uint, uint, IntPtr, void> )load(
                "glGetQueryBufferObjecti64v" );
            contextPtr->glGetQueryBufferObjectiv = ( delegate*<uint, uint, uint, IntPtr, void> )load(
                "glGetQueryBufferObjectiv" );
            contextPtr->glGetQueryBufferObjectui64v = ( delegate*<uint, uint, uint, IntPtr, void> )load(
                "glGetQueryBufferObjectui64v" );
            contextPtr->glGetQueryBufferObjectuiv = ( delegate*<uint, uint, uint, IntPtr, void> )load(
                "glGetQueryBufferObjectuiv" );
            contextPtr->glGetTextureImage = ( delegate*<uint, int, uint, uint, uint, void*, void> )load(
                "glGetTextureImage" );
            contextPtr->glGetTextureLevelParameterfv = ( delegate*<uint, int, uint, float*, void> )load(
                "glGetTextureLevelParameterfv" );
            contextPtr->glGetTextureLevelParameteriv = ( delegate*<uint, int, uint, int*, void> )load(
                "glGetTextureLevelParameteriv" );
            contextPtr->glGetTextureParameterIiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetTextureParameterIiv" );
            contextPtr->glGetTextureParameterIuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glGetTextureParameterIuiv" );
            contextPtr->glGetTextureParameterfv = ( delegate*<uint, uint, float*, void> )load(
                "glGetTextureParameterfv" );
            contextPtr->glGetTextureParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glGetTextureParameteriv" );
            contextPtr->glGetTextureSubImage = ( delegate*<uint, int, int, int, int, uint, uint, uint, uint, uint, uint, void*, void> )load(
                "glGetTextureSubImage" );
            contextPtr->glGetTransformFeedbacki64_v = ( delegate*<uint, uint, uint, long*, void> )load(
                "glGetTransformFeedbacki64_v" );
            contextPtr->glGetTransformFeedbacki_v = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetTransformFeedbacki_v" );
            contextPtr->glGetTransformFeedbackiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetTransformFeedbackiv" );
            contextPtr->glGetVertexArrayIndexed64iv = ( delegate*<uint, uint, uint, long*, void> )load(
                "glGetVertexArrayIndexed64iv" );
            contextPtr->glGetVertexArrayIndexediv = ( delegate*<uint, uint, uint, int*, void> )load(
                "glGetVertexArrayIndexediv" );
            contextPtr->glGetVertexArrayiv = ( delegate*<uint, uint, int*, void> )load(
                "glGetVertexArrayiv" );
            contextPtr->glGetnCompressedTexImage = ( delegate*<uint, int, uint, void*, void> )load(
                "glGetnCompressedTexImage" );
            contextPtr->glGetnTexImage = ( delegate*<uint, int, uint, uint, uint, void*, void> )load(
                "glGetnTexImage" );
            contextPtr->glGetnUniformdv = ( delegate*<uint, int, uint, double*, void> )load(
                "glGetnUniformdv" );
            contextPtr->glGetnUniformfv = ( delegate*<uint, int, uint, float*, void> )load(
                "glGetnUniformfv" );
            contextPtr->glGetnUniformiv = ( delegate*<uint, int, uint, int*, void> )load(
                "glGetnUniformiv" );
            contextPtr->glGetnUniformuiv = ( delegate*<uint, int, uint, uint*, void> )load(
                "glGetnUniformuiv" );
            contextPtr->glInvalidateNamedFramebufferData = ( delegate*<uint, uint, uint*, void> )load(
                "glInvalidateNamedFramebufferData" );
            contextPtr->glInvalidateNamedFramebufferSubData = ( delegate*<uint, uint, uint*, int, int, uint, uint, void> )load(
                "glInvalidateNamedFramebufferSubData" );
            contextPtr->glMapNamedBuffer = ( delegate*<uint, uint, void*> )load(
                "glMapNamedBuffer" );
            contextPtr->glMapNamedBufferRange = ( delegate*<uint, IntPtr, UIntPtr, uint, void*> )load(
                "glMapNamedBufferRange" );
            contextPtr->glMemoryBarrierByRegion = ( delegate*<uint, void> )load(
                "glMemoryBarrierByRegion" );
            contextPtr->glNamedBufferData = ( delegate*<uint, UIntPtr, void*, uint, void> )load(
                "glNamedBufferData" );
            contextPtr->glNamedBufferStorage = ( delegate*<uint, UIntPtr, void*, uint, void> )load(
                "glNamedBufferStorage" );
            contextPtr->glNamedBufferSubData = ( delegate*<uint, IntPtr, UIntPtr, void*, void> )load(
                "glNamedBufferSubData" );
            contextPtr->glNamedFramebufferDrawBuffer = ( delegate*<uint, uint, void> )load(
                "glNamedFramebufferDrawBuffer" );
            contextPtr->glNamedFramebufferDrawBuffers = ( delegate*<uint, uint, uint*, void> )load(
                "glNamedFramebufferDrawBuffers" );
            contextPtr->glNamedFramebufferParameteri = ( delegate*<uint, uint, int, void> )load(
                "glNamedFramebufferParameteri" );
            contextPtr->glNamedFramebufferReadBuffer = ( delegate*<uint, uint, void> )load(
                "glNamedFramebufferReadBuffer" );
            contextPtr->glNamedFramebufferRenderbuffer = ( delegate*<uint, uint, uint, uint, void> )load(
                "glNamedFramebufferRenderbuffer" );
            contextPtr->glNamedFramebufferTexture = ( delegate*<uint, uint, uint, int, void> )load(
                "glNamedFramebufferTexture" );
            contextPtr->glNamedFramebufferTextureLayer = ( delegate*<uint, uint, uint, int, int, void> )load(
                "glNamedFramebufferTextureLayer" );
            contextPtr->glNamedRenderbufferStorage = ( delegate*<uint, uint, uint, uint, void> )load(
                "glNamedRenderbufferStorage" );
            contextPtr->glNamedRenderbufferStorageMultisample = ( delegate*<uint, uint, uint, uint, uint, void> )load(
                "glNamedRenderbufferStorageMultisample" );
            contextPtr->glReadnPixels = ( delegate*<int, int, int, int, uint, uint, uint, void*, void> )load(
                "glReadnPixels" );
            contextPtr->glTextureBarrier = ( delegate*<void> )load( "glTextureBarrier" );
            contextPtr->glTextureBuffer = ( delegate*<uint, uint, uint, void> )load(
                "glTextureBuffer" );
            contextPtr->glTextureBufferRange = ( delegate*<uint, uint, uint, IntPtr, UIntPtr, void> )load(
                "glTextureBufferRange" );
            contextPtr->glTextureParameterIiv = ( delegate*<uint, uint, int*, void> )load(
                "glTextureParameterIiv" );
            contextPtr->glTextureParameterIuiv = ( delegate*<uint, uint, uint*, void> )load(
                "glTextureParameterIuiv" );
            contextPtr->glTextureParameterf = ( delegate*<uint, uint, float, void> )load(
                "glTextureParameterf" );
            contextPtr->glTextureParameterfv = ( delegate*<uint, uint, float*, void> )load(
                "glTextureParameterfv" );
            contextPtr->glTextureParameteri = ( delegate*<uint, uint, int, void> )load(
                "glTextureParameteri" );
            contextPtr->glTextureParameteriv = ( delegate*<uint, uint, int*, void> )load(
                "glTextureParameteriv" );
            contextPtr->glTextureStorage1D = ( delegate*<uint, uint, uint, uint, void> )load(
                "glTextureStorage1D" );
            contextPtr->glTextureStorage2D = ( delegate*<uint, uint, uint, uint, uint, void> )load(
                "glTextureStorage2D" );
            contextPtr->glTextureStorage2DMultisample = ( delegate*<uint, uint, uint, uint, uint, bool, void> )load(
                "glTextureStorage2DMultisample" );
            contextPtr->glTextureStorage3D = ( delegate*<uint, uint, uint, uint, uint, uint, void> )load(
                "glTextureStorage3D" );
            contextPtr->glTextureStorage3DMultisample = ( delegate*<uint, uint, uint, uint, uint, uint, bool, void> )load(
                "glTextureStorage3DMultisample" );
            contextPtr->glTextureSubImage1D = ( delegate*<uint, int, int, uint, uint, uint, void*, void> )load(
                "glTextureSubImage1D" );
            contextPtr->glTextureSubImage2D = ( delegate*<uint, int, int, int, uint, uint, uint, uint, void*, void> )load(
                "glTextureSubImage2D" );
            contextPtr->glTextureSubImage3D = ( delegate*<uint, int, int, int, int, uint, uint, uint, uint, uint, void*, void> )load(
                "glTextureSubImage3D" );
            contextPtr->glTransformFeedbackBufferBase = ( delegate*<uint, uint, uint, void> )load(
                "glTransformFeedbackBufferBase" );
            contextPtr->glTransformFeedbackBufferRange = ( delegate*<uint, uint, uint, IntPtr, UIntPtr, void> )load(
                "glTransformFeedbackBufferRange" );
            contextPtr->glUnmapNamedBuffer = ( delegate*<uint, bool> )load( "glUnmapNamedBuffer" );
            contextPtr->glVertexArrayAttribBinding = ( delegate*<uint, uint, uint, void> )load(
                "glVertexArrayAttribBinding" );
            contextPtr->glVertexArrayAttribFormat = ( delegate*<uint, uint, int, uint, bool, uint, void> )load(
                "glVertexArrayAttribFormat" );
            contextPtr->glVertexArrayAttribIFormat = ( delegate*<uint, uint, int, uint, uint, void> )load(
                "glVertexArrayAttribIFormat" );
            contextPtr->glVertexArrayAttribLFormat = ( delegate*<uint, uint, int, uint, uint, void> )load(
                "glVertexArrayAttribLFormat" );
            contextPtr->glVertexArrayBindingDivisor = ( delegate*<uint, uint, uint, void> )load(
                "glVertexArrayBindingDivisor" );
            contextPtr->glVertexArrayElementBuffer = ( delegate*<uint, uint, void> )load(
                "glVertexArrayElementBuffer" );
            contextPtr->glVertexArrayVertexBuffer = ( delegate*<uint, uint, uint, IntPtr, uint, void> )load(
                "glVertexArrayVertexBuffer" );
            contextPtr->glVertexArrayVertexBuffers = ( delegate*<uint, uint, uint, uint*, IntPtr*, uint*, void> )load(
                "glVertexArrayVertexBuffers" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 4.5 APIs" );
        }

        internal static unsafe void LoadGLcore46(
                                    OpenglContext* contextPtr,
                                    delegate*<string, IntPtr> load )
        {
            if( !core46 )
            {
                InternalIO.InternalAppendLog( "The core version 4.6 is not supported." );
                throw new Exception( "Final Version" );
            }

            #region load

            contextPtr->glMultiDrawArraysIndirectCount = ( delegate*<uint, void*, IntPtr, uint, uint, void> )load(
                "glMultiDrawArraysIndirectCount" );
            contextPtr->glMultiDrawElementsIndirectCount = ( delegate*<uint, uint, void*, IntPtr, uint, uint, void> )load(
                "glMultiDrawElementsIndirectCount" );
            contextPtr->glPolygonOffsetClamp = ( delegate*<float, float, float, void> )load(
                "glPolygonOffsetClamp" );
            contextPtr->glSpecializeShader = ( delegate*<uint, byte*, uint, uint*, uint*, void> )load(
                "glSpecializeShader" );

            #endregion load

            InternalIO.InternalAppendLog( "Successfully load all OpenGL 4.6 APIs" );
        }

    }
}