2013/2/14 erik quanstrom <[email protected]>
> On Thu Feb 14 13:52:09 EST 2013, [email protected] wrote: > > > we can't do XOR drawing with draw(2) like with bitblt, can we? > > if there's a trivial α channel, it's possible. otherwise one > runs the risk of α multiplication. > > No alpha there - I'd like to learn the trick please.
