Feature request : dc.setAlpha(0.5)

I think you're asking for a significant enhancement since the devices don't appear to support alpha blending. Either a pixel is colored or it is not.

I'll submit this as a feature request, but Travis is correct--I think this is more of a long term, wish list sort of thing, and would require device support.

Right. The devices would have to support thousands of colors to make this feasible.

Was just a nice thing to have, it's not a showstopper.