pub type PFN_glPathGlyphsNV = unsafe extern "system" fn(_firstPathName: GLuint, _fontTarget: GLenum, _fontName: *const c_void, _fontStyle: GLbitfield, _numGlyphs: GLsizei, _type: GLenum, _charcodes: *const c_void, _handleMissingGlyphs: GLenum, _pathParameterTemplate: GLuint, _emScale: GLfloat);