OpenGl_ExtGS* extGS; //!< GL_EXT_geometry_shader4
Standard_Boolean extBgra; //!< GL_EXT_bgra
Standard_Boolean extAnis; //!< GL_EXT_texture_filter_anisotropic
+ Standard_Boolean extPDS; //!< GL_EXT_packed_depth_stencil
Standard_Boolean atiMem; //!< GL_ATI_meminfo
Standard_Boolean nvxMem; //!< GL_NVX_gpu_memory_info