Re: alpha support for colors

[Eli Zaretskii]

> From: aaditya sood <address@hidden>
> Date: Tue, 30 Oct 2012 07:37:07 +0000 (UTC)
> 
> We'd want to do a composition of all the faces that exist for a
> particular character, taking into account things like alpha values.

What do you mean by "composition of all the faces"?  Why "all"?

> I think a good use case is things like flymake error faces. I want my
> error lines to be more "reddish" while still retaining the original
> font lock highlighting.

How is this different from changing the color of the face to be more
"reddish"?

> However I'd like to discuss some of the design issues, or where to
> start hacking beforehand.

Then please tell more.