struct GraphicDriverCapabilities
        {
         struct Range
         {
            Portable::Float32 Min;
            Portable::Float32 Max;
         };
         //GL_ALIASED_POINT_SIZE_RANGE
         Range AliasedPointSizeRange;//the smallest and largest supported sizes for aliased points
         //GL_ALIASED_LINE_WIDTH_RANGE
         Range AliasedLineWidthRange;//the smallest and largest supported widths for aliased lines
         //GL_COLOR_MATRIX_STACK_DEPTH
         Portable::UInt32 ColorMatrixStackDepth;//the maximum supported depth of the projection matrix stack
         //GL_COMPRESSED_TEXTURE_FORMATS
         Collections::Vector<ImagePixelFormat::Type> CompressedTextureFormats;//indicating which compressed texture formats are available
         //GL_DOUBLEBUFFER
         Portable::Bool DoubleBuffer;//a single boolean value indicating whether double buffering is supported
         //GL_LINE_WIDTH_GRANULARITY
         Portable::Float32 LineWidthGranularity;//the width difference between adjacent supported widths for antialiased lines
         //GL_LINE_WIDTH_RANGE
         Range LineWidthRange;//the smallest and largest supported widths for antialiased lines
         //GL_MAX_3D_TEXTURE_SIZE
         Range Max3DTextureSize;//a rough estimate of the largest 3D texture that can handle
         //GL_MAX_CLIENT_ATTRIB_STACK_DEPTH
         Range MaxClientAttributeStackDepth;//indicating the maximum supported depth of the client attribute stack
         //GL_MAX_ATTRIB_STACK_DEPTH
         Portable::UInt32 MaxAttributeStackDepth;//the maximum supported depth of the attribute stack
         //GL_MAX_CLIP_PLANES
         Portable::UInt32 MaxClipPlanes;//the maximum number of application-defined clipping planes
         //GL_MAX_COLOR_MATRIX_STACK_DEPTH
         Portable::UInt32 MaxColorMatrixStackDepth;//the maximum supported depth of the color matrix stack
         //GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
         Portable::UInt32 MaxCombinedTextureImageUnits;// the maximum supported texture image units that can be used to access texture maps from the vertex shader and the fragment processor combined
         //GL_MAX_CUBE_MAP_TEXTURE_SIZE
         Geometry::Size MaxCubeMapTextureSize;//gives a rough estimate of the largest cube-map texture that can be handle
         //GL_MAX_DRAW_BUFFERS
         Portable::UInt32 MaxDrawBuffers;//maximum number of simultaneous output colors allowed from a fragment shader
         //GL_MAX_ELEMENTS_INDICES
         Portable::UInt32 MaxElementsIndices;//the recommended maximum number of vertex array indices
         //GL_MAX_ELEMENTS_VERTICES
         Portable::UInt32 MaxElementsVertices;//the recommended maximum number of vertex array vertices
         //GL_MAX_EVAL_ORDER
         Portable::UInt32 MaxEvalOrder;//the maximum equation order supported by 1D and 2D evaluators
         //GL_MAX_FRAGMENT_UNIFORM_COMPONENTS
         Portable::UInt32 MaxFragmentUniformComponents;//the maximum number of individual floating-point, integer, or boolean values that can be held in uniform variable storage for a fragment shader
         //GL_MAX_LIGHTS
         Portable::UInt32 MaxLights;//the maximum number of lights
         //GL_MAX_LIST_NESTING
         Portable::UInt32 MaxListNesting;//the maximum recursion depth allowed during display-list traversal
         //GL_MAX_MODELVIEW_STACK_DEPTH
         Portable::UInt32 MaxModelviewStackDepth;//the maximum supported depth of the modelview matrix stack
         //GL_MAX_NAME_STACK_DEPTH
         Portable::UInt32 MaxNameStackDepth;//the maximum supported depth of the selection name stack
         //GL_MAX_PIXEL_MAP_TABLE
         Portable::UInt32 MaxPixelMapTable;//the maximum supported size of a glPixelMap lookup table
         //GL_MAX_PROJECTION_STACK_DEPTH
         Portable::UInt32 MaxProjectionStackDepth;//maximum supported depth of the projection matrix stack
         //GL_MAX_TEXTURE_COORDS
         Portable::UInt32 MaxTextureCoords;//maximum number of texture coordinate sets available to vertex and fragment shaders
         //GL_MAX_TEXTURE_IMAGE_UNITS
         Portable::UInt32 MaxTextureImageUnits;//the maximum supported texture image units that can be used to access texture maps from the fragment shader
         //GL_MAX_TEXTURE_LOD_BIAS
         Portable::UInt32 MaxTextureLODBias;//the maximum, absolute value of the texture level-of-detail bias
         //GL_MAX_TEXTURE_SIZE
         Geometry::Size MaxTextureSize;//a rough estimate of the largest texture that can be handle
         //GL_MODELVIEW_STACK_DEPTH
         Portable::UInt32 MaxTextureStackDepth;//the maximum supported depth of the texture matrix stack
         //GL_MAX_TEXTURE_UNITS
         Portable::UInt32 MaxTextureUnits;//indicating the number of conventional texture units supported
         //GL_MAX_VARYING_FLOATS
         Portable::UInt32 MaxVaryingFloats;//the maximum number of interpolators available for processing varying variables used by vertex and fragment shaders
         //GL_MAX_VERTEX_ATTRIBS
         Portable::UInt32 MaxVertexAttribs;//maximum number of 4-component generic vertex attributes accessible to a vertex shader
         //GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS
         Portable::UInt32 MaxVertexTextureImageUnits;//maximum supported texture image units that can be used to access texture maps from the vertex shader
         //GL_MAX_VERTEX_UNIFORM_COMPONENTS
         Portable::UInt32 MaxVertexUniformComponents;//maximum number of individual floating-point, integer, or boolean values that can be held in uniform variable storage for a vertex shader
         //GL_MAX_VIEWPORT_DIMS
         Geometry::Size MaxViewportDimension;//maximum supported width and height of the viewport
         //GL_NUM_COMPRESSED_TEXTURE_FORMATS
         Portable::UInt32 NumCompressedTextureFormats;//indicating the number of available compressed texture formats
         //GL_POINT_SIZE_GRANULARITY
         Portable::Float32 PointSizeGranularity;//the size difference between adjacent supported sizes for antialiased points
         //GL_POINT_SIZE_RANGE         
         Range PointSizeRange;//the smallest and largest supported sizes for antialiased points
         //GL_SMOOTH_LINE_WIDTH_RANGE
         Range SmoothLineWidthRange;//the smallest and largest supported widths for antialiased lines
         //GL_SMOOTH_LINE_WIDTH_GRANULARITY
         Portable::Float32 SmoothLineWidthGranularity;//the granularity of widths for antialiased lines
         //GL_SMOOTH_POINT_SIZE_RANGE
         Range SmoothPointSizeRange;//the smallest and largest supported widths for antialiased points
         //GL_SMOOTH_POINT_SIZE_GRANULARITY
         Portable::Float32 SmoothPointsizeGranularity;//the granularity of sizes for antialiased points
         //GL_STEREO
         Portable::Bool Stereo;//indicating whether stereo buffers(left and right) are supported
        };

        struct GraphicDriverCapabilities
        {
         struct Range
         {
            Portable::Float32 Min;
            Portable::Float32 Max;
         };
         //GL_ALIASED_POINT_SIZE_RANGE
         Range AliasedPointSizeRange;//the smallest and largest supported sizes for aliased points
         //GL_ALIASED_LINE_WIDTH_RANGE
         Range AliasedLineWidthRange;//the smallest and largest supported widths for aliased lines
         //GL_COLOR_MATRIX_STACK_DEPTH
         Portable::UInt32 ColorMatrixStackDepth;//the maximum supported depth of the projection matrix stack
         //GL_COMPRESSED_TEXTURE_FORMATS
         Collections::Vector<ImagePixelFormat::Type> CompressedTextureFormats;//indicating which compressed texture formats are available
         //GL_DOUBLEBUFFER
         Portable::Bool DoubleBuffer;//a single boolean value indicating whether double buffering is supported
         //GL_LINE_WIDTH_GRANULARITY
         Portable::Float32 LineWidthGranularity;//the width difference between adjacent supported widths for antialiased lines
         //GL_LINE_WIDTH_RANGE
         Range LineWidthRange;//the smallest and largest supported widths for antialiased lines
         //GL_MAX_3D_TEXTURE_SIZE
         Range Max3DTextureSize;//a rough estimate of the largest 3D texture that can handle
         //GL_MAX_CLIENT_ATTRIB_STACK_DEPTH
         Range MaxClientAttributeStackDepth;//indicating the maximum supported depth of the client attribute stack
         //GL_MAX_ATTRIB_STACK_DEPTH
         Portable::UInt32 MaxAttributeStackDepth;//the maximum supported depth of the attribute stack
         //GL_MAX_CLIP_PLANES
         Portable::UInt32 MaxClipPlanes;//the maximum number of application-defined clipping planes
         //GL_MAX_COLOR_MATRIX_STACK_DEPTH
         Portable::UInt32 MaxColorMatrixStackDepth;//the maximum supported depth of the color matrix stack
         //GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
         Portable::UInt32 MaxCombinedTextureImageUnits;// the maximum supported texture image units that can be used to access texture maps from the vertex shader and the fragment processor combined
         //GL_MAX_CUBE_MAP_TEXTURE_SIZE
         Geometry::Size MaxCubeMapTextureSize;//gives a rough estimate of the largest cube-map texture that can be handle
         //GL_MAX_DRAW_BUFFERS
         Portable::UInt32 MaxDrawBuffers;//maximum number of simultaneous output colors allowed from a fragment shader
         //GL_MAX_ELEMENTS_INDICES
         Portable::UInt32 MaxElementsIndices;//the recommended maximum number of vertex array indices
         //GL_MAX_ELEMENTS_VERTICES
         Portable::UInt32 MaxElementsVertices;//the recommended maximum number of vertex array vertices
         //GL_MAX_EVAL_ORDER
         Portable::UInt32 MaxEvalOrder;//the maximum equation order supported by 1D and 2D evaluators
         //GL_MAX_FRAGMENT_UNIFORM_COMPONENTS
         Portable::UInt32 MaxFragmentUniformComponents;//the maximum number of individual floating-point, integer, or boolean values that can be held in uniform variable storage for a fragment shader
         //GL_MAX_LIGHTS
         Portable::UInt32 MaxLights;//the maximum number of lights
         //GL_MAX_LIST_NESTING
         Portable::UInt32 MaxListNesting;//the maximum recursion depth allowed during display-list traversal
         //GL_MAX_MODELVIEW_STACK_DEPTH
         Portable::UInt32 MaxModelviewStackDepth;//the maximum supported depth of the modelview matrix stack
         //GL_MAX_NAME_STACK_DEPTH
         Portable::UInt32 MaxNameStackDepth;//the maximum supported depth of the selection name stack
         //GL_MAX_PIXEL_MAP_TABLE
         Portable::UInt32 MaxPixelMapTable;//the maximum supported size of a glPixelMap lookup table
         //GL_MAX_PROJECTION_STACK_DEPTH
         Portable::UInt32 MaxProjectionStackDepth;//maximum supported depth of the projection matrix stack
         //GL_MAX_TEXTURE_COORDS
         Portable::UInt32 MaxTextureCoords;//maximum number of texture coordinate sets available to vertex and fragment shaders
         //GL_MAX_TEXTURE_IMAGE_UNITS
         Portable::UInt32 MaxTextureImageUnits;//the maximum supported texture image units that can be used to access texture maps from the fragment shader
         //GL_MAX_TEXTURE_LOD_BIAS
         Portable::UInt32 MaxTextureLODBias;//the maximum, absolute value of the texture level-of-detail bias
         //GL_MAX_TEXTURE_SIZE
         Geometry::Size MaxTextureSize;//a rough estimate of the largest texture that can be handle
         //GL_MODELVIEW_STACK_DEPTH
         Portable::UInt32 MaxTextureStackDepth;//the maximum supported depth of the texture matrix stack
         //GL_MAX_TEXTURE_UNITS
         Portable::UInt32 MaxTextureUnits;//indicating the number of conventional texture units supported
         //GL_MAX_VARYING_FLOATS
         Portable::UInt32 MaxVaryingFloats;//the maximum number of interpolators available for processing varying variables used by vertex and fragment shaders
         //GL_MAX_VERTEX_ATTRIBS
         Portable::UInt32 MaxVertexAttribs;//maximum number of 4-component generic vertex attributes accessible to a vertex shader
         //GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS
         Portable::UInt32 MaxVertexTextureImageUnits;//maximum supported texture image units that can be used to access texture maps from the vertex shader
         //GL_MAX_VERTEX_UNIFORM_COMPONENTS
         Portable::UInt32 MaxVertexUniformComponents;//maximum number of individual floating-point, integer, or boolean values that can be held in uniform variable storage for a vertex shader
         //GL_MAX_VIEWPORT_DIMS
         Geometry::Size MaxViewportDimension;//maximum supported width and height of the viewport
         //GL_NUM_COMPRESSED_TEXTURE_FORMATS
         Portable::UInt32 NumCompressedTextureFormats;//indicating the number of available compressed texture formats
         //GL_POINT_SIZE_GRANULARITY
         Portable::Float32 PointSizeGranularity;//the size difference between adjacent supported sizes for antialiased points
         //GL_POINT_SIZE_RANGE         
         Range PointSizeRange;//the smallest and largest supported sizes for antialiased points
         //GL_SMOOTH_LINE_WIDTH_RANGE
         Range SmoothLineWidthRange;//the smallest and largest supported widths for antialiased lines
         //GL_SMOOTH_LINE_WIDTH_GRANULARITY
         Portable::Float32 SmoothLineWidthGranularity;//the granularity of widths for antialiased lines
         //GL_SMOOTH_POINT_SIZE_RANGE
         Range SmoothPointSizeRange;//the smallest and largest supported widths for antialiased points
         //GL_SMOOTH_POINT_SIZE_GRANULARITY
         Portable::Float32 SmoothPointsizeGranularity;//the granularity of sizes for antialiased points
         //GL_STEREO
         Portable::Bool Stereo;//indicating whether stereo buffers(left and right) are supported
         //GL_SubPixel_Bits
         Portable::UInt32 SubPixelBits;
         //GL_Max_Array_Texture_Layers
         Portable::UInt32 MaxArrayTextureLayers;
         //GL_Max_RenderBuffer_Size
         Portable::UInt32 MaxRenderBufferSize;
         //GL_Max_Viewports
         Portable::UInt32 MaxViewports;
         //GL_Viewport_Subpixel_Bits
         Portable::UInt32 ViewportSubPixelBits;
         //GL_Viewport_Bounds_Range
         Geometry::Size ViewportBoundsRange;
         //GL_Layer_Provoking_Vertex
         Portable::UInt32 LayerProvokingVertex;
         //GL_Max_Texture_Buffer_Size
         Portable::UInt32 MaxTextureBufferSize;
         //GL_Max_Rectangle_Texture_Size
         Portable::UInt32 MaxRectangleTextureSize;
         //GL_Program_Binary_Formats
         Collections::Vector<Portable::UInt32> ProgramBinaryFormats;
         //GL_Num_Program_Binary_Formats
         Portable::UInt32 NumProgramBinaryFormats;
         //GL_Shader_Binary_Formats
         Collections::Vector<Portable::UInt32> ShaderBinaryFormats;
         //gl_num_shader_binary_formats
         Portable::UInt32 NumShaderBinaryFormats;
         //gl_Shader_compiler
         Portable::Bool ShaderCompiler;
         //gl_extensions
         Collections::Vector<Portable::String> Extensions;
         //gl_num_extensions
         Portable::UInt32 NumExtenions;
         //gl_major_version
         Portable::UInt32 MajorVersion;
         //gl_minor_version
         Portable::UInt32 MinorVersion;
         //gl_context_flags
         Portable::UInt32 ContextFlags;
         //gl_renderer
         Portable::String Renderer;
         //gl_shading_language_version
         Portable::String ShadingLanguageVersion;
         Portable::UInt32 ShaderModel;
         //gl_Vendor
         Portable::String m_Vendor;
         //gl_version
         Portable::String m_Version;
         //gl_Max_Vertex_Uniform_Vectors
         Portable::UInt32 MaxVertexUniformVectors;
         //gl_Max_Vertex_Uniform_Blocks
         Portable::UInt32 MaxVertexUniformBlocks;
         //gl_Max_Vertex_Output_Components
         Portable::UInt32 MaxVertexOutputComponents;
         //gl_Max_Tess_Gen_Level
         Portable::UInt32 MaxTessGenLevel;
         //gl_Max_Patch_Vertices
         Portable::UInt32 MaxPatchVertices;
         //gl_Max_Tess_Control_Uniform_Components
         Portable::UInt32 MaxTessControlUniformComponents;
         //gl_Max_Tess_Evaluation_Uniform_Components
         Portable::UInt32 MaxTessEvaluationUniformComponents;
         //gl_Max_Tess_Control_Texture_Image_Units
         Portable::UInt32 MaxTessControlTextureImageUnits;
         //gl_Max_Tess_Evaluation_Texture_Image_Units
         Portable::UInt32 MaxTessEvaluationTextureImageUnits;
         //gl_Max_Tess_Control_Output_Components
         Portable::UInt32 MaxTessControlOutputComponents;
         //gl_Max_Tess_Patch_Components
         Portable::UInt32 MaxTessPatchComponents;
         //gl_Max_Tess_Control_Total_Output_Components
         Portable::UInt32 MaxTessControlTotalOutputComponents;
         //gl_Max_Tess_Evaluation_Output_Components
         Portable::UInt32 MaxTessEvaluationOutputComponents;
         //gl_Max_Tess_Control_Input_Components
         Portable::UInt32 MaxTessControlInputComponents;
         //gl_Max_Tess_Evaluation_Input_Components
         Portable::UInt32 MaxTessEvaluationInputComponents;
         //gl_Max_Tess_Control_Uniform_Blocks
         Portable::UInt32 MaxTessControlUniformBlocks;
         //gl_Max_Tess_Evaluation_Uniform_Blocks
         Portable::UInt32 MaxTessEvaluationUniformBlocks;
         //gl_Max_Geometry_Uniform_Blocks
         Portable::UInt32 MaxGeometryUniformBlocks;
         //gl_Max_Geometry_Input_Components
         Portable::UInt32 MaxGeometryInputComponents;
         //gl_Max_Geometry_Output_Components
         Portable::UInt32 MaxGeometryOutputComponents;
         //gl_Max_Geometry_Output_Vertices
         Portable::UInt32 MaxGeometryOutputVertices;
         //gl_Max_Geometry_Total_Output_Components
         Portable::UInt32 MaxGeometryTotalOutputComponents;
         //gl_Max_Geometry_Texture_Image_Units
         Portable::UInt32 MaxGeometryTextureImageUnits;
         //gl_Max_Geometry_Shader_Invocations
         Portable::UInt32 MaxGeometryShaderInvocations;
         //gl_Max_Vertex_Streams
         Portable::UInt32 MaxVertexStreams;
         //gl_Max_Fragment_Uniform_Components
         Portable::UInt32 MaxFragmentUniformComponents;
         //gl_Max_Fragment_Uniform_Vectors
         Portable::UInt32 MaxFragmentUniformVectors;
         //gl_Max_Fragment_Uniform_Blocks
         Portable::UInt32 MaxFragmentUniformBlocks;
         //gl_Max_Fragment_Input_Components
         Portable::UInt32 MaxFragmentInputComponents;
         //gl_Min_Program_Texel_Offset
         Portable::UInt32 MinProgramTexelOffset;
         //gl_Max_Program_Texel_Offset
         Portable::UInt32 MaxProgramTexelOffset;
         //gl_Min_Program_Texture_Gather_Offset
         Portable::UInt32 MinProgramTextureGatherOffset;
         //gl_Max_Program_Texture_Gather_Offset
         Portable::UInt32 MaxProgramTextureGatherOffset;
         //gl_Max_Uniform_Buffer_Bindings
         Portable::UInt32 MaxUniformBufferBindings;
         //gl_Max_Uniform_Block_Size
         Portable::UInt32 MaxUniformBlockSize;
         //gl_Uniform_Buffer_Offset_Alignment
         Portable::UInt32 UniformBufferOffsetAlignment;
         //gl_Max_Combined_Uniform_Blocks
         Portable::UInt32 MaxCombinedUniformBlocks;
         //gl_Max_Varying_Components
         Portable::UInt32 MaxVaryingComponents;
         //gl_Max_Vaying_Vectors
         Portable::UInt32 MaxVayingVectors;
         //gl_Max_Combined_Texture_Image_Units
         Portable::UInt32 MaxCombinedTextureImageUnits;
         //gl_Max_Subroutines
         Portable::UInt32 MaxSubroutines;
         //gl_Max_Subroutine_Uniform_Locations
         Portable::UInt32 MaxSubroutineUniformLocations;
         //gl_Max_Combined_Vertex_Uniform_Components
         Portable::UInt32 MaxCombinedVertexUniformComponents;
         //gl_Max_Combined_Geometry_Uniform_Components
         Portable::UInt32 MaxCombinedGeometryUniformComponents;
         //gl_Max_Combined_Tess_Control_Uniform_Components
         Portable::UInt32 MaxCombinedTessControlUniformComponents;
         //gl_Max_Combined_Tess_Evaluation_Uniform_Components
         Portable::UInt32 MaxCombinedTessEvaluationUniformComponents;
         //gl_Max_Combined_Fragment_Uniform_Components
         Portable::UInt32 MaxCombinedFragmentUniformComponents;
         //gl_Max_Sample_Mask_Word
         Portable::UInt32 MaxSampleMaskWord;
         //gl_Max_Color_Texture_Samples
         Portable::UInt32 MaxColorTextureSamples;
         //gl_Max_Depth_Texture_Samples
         Portable::UInt32 MaxDepthTextureSamples;
         //gl_Max_Interger_Samples
         Portable::UInt32 MaxIntergerSamples;
         //gl_Query_Counter_Bits
         Portable::UInt32 QueryCounterBits[3];
         //gl_Max_Server_Wait_Timeout
         Portable::UInt64 MaxServerWaitTimeout;
         //gl_Min_Fragment_Interpolation_Offset
         Portable::Float32 MinFragmentInterpolationOffset;
         //gl_Max_Fragment_Interpolation_Offset
         Portable::Float32 MaxFragmentInterpolationOffset;
         //gl_Fragment_Interpolation_Offset_Bits
         Portable::UInt32 FragmentInterpolationOffsetBits;
         //gl_Max_Transform_Feedback_Interleaved_Components
         Portable::UInt32 MaxTransformFeedbackInterleavedComponents;
         //gl_Max_Transform_Feedback_Separate_Attribs
         Portable::UInt32 MaxTransformFeedbackSeparateAttribs;
         //gl_Max_Transform_Feedback_Separete_Components
         Portable::UInt32 MaxTransformFeedbackSepareteComponents;
         //gl_Max_Transform_Feedback_Buffers
         Portable::UInt32 MaxTransformFeedbackBuffers;
         //gl_Max_Dual_Source_Draw_Buffers
         Portable::UInt32 MaxDualSourceDrawBuffers;
         //gl_Sample_Buffers
         Portable::UInt32 SampleBuffers;
         //gl_Samples
         Portable::UInt32 Samples;
         //gl_Max_Color_Attachments
         Portable::UInt32 MaxColorAttachments;
         //gl_Max_Samples
         Portable::UInt32 MaxSamples;
         //gl_Implementation_Color_Read_Type
         Portable::UInt32 ImplementationColorReadType;
         //gl_Implementation_Color_Read_Format
         Portable::UInt32 ImplementationColorReadFormat;
        };