Is it okay for Christians to drink wine while being Christians?

A long ago I read that according to Islam it's possible for Christian to be Christian and eat pig and drink wine while being in a status of d'ima (or something like that). Is that true, or it's forbidden also for non-Muslims according to Islam? N.b. This question may be practical in some Muslim countries. According to Islam, do they need to let Christians drink wine and eat pig or it's forbidden also for them if we are talking about sharia?