What is the best way to come out as gay, to your anti-gay parents?

My parents are anti-gay. my dad especially. But then i don't have the strongest relationship with my dad. My mum is christian but i think she is becoming more expectant to the whole gay idea. My friends are should be okay about it as I'm quite camp, why can't they be like them, ay?. I am very confused on the matter of coming out to my parents . I hope they can understand. Have you got any advice for me? xD