code: func VertexAttribPointer(index uint32, size int32, xtype uint32, normalized bool, stride int32, pointer unsafe.Pointer) {
  	syscall.Syscall6(gpVertexAttribPointer, 6, uintptr(index), uintptr(size), uintptr(xtype), boolToUintptr(normalized), uintptr(stride), uintptr(pointer))
  }
docs: // define an array of generic vertex attribute data