Graphics.Rendering.OpenGL.Raw.SGIX.TextureCoordinateClamp
glGetSGIXTextureCoordinateClamp
gl_SGIX_texture_coordinate_clamp
gl_TEXTURE_MAX_CLAMP_R_SGIX
gl_TEXTURE_MAX_CLAMP_S_SGIX
gl_TEXTURE_MAX_CLAMP_T_SGIX