code: func ScissorIndexed(index uint32, left int32, bottom int32, width int32, height int32) {
  	syscall.Syscall6(gpScissorIndexed, 5, uintptr(index), uintptr(left), uintptr(bottom), uintptr(width), uintptr(height), 0)
  }
docs: // define the scissor box for a specific viewport