pub type PFNGLPATHMEMORYGLYPHINDEXARRAYNVPROC = Option<unsafe extern "C" fn(firstPathName: GLuint, fontTarget: GLenum, fontSize: GLsizeiptr, fontData: *const c_void, faceIndex: GLsizei, firstGlyphIndex: GLuint, numGlyphs: GLsizei, pathParameterTemplate: GLuint, emScale: GLfloat) -> GLenum>;