John Hunter wrote:
>>>>>> "Eric" == Eric Firing <[EMAIL PROTECTED]> writes:
[...]
> Indeed, lots of grand ideas.  I've been toying with the idea of trying
> to organize an mpl sprint in some fabulous destination, and trying to

Somewhere in Hawaii, of course!

> raise funds for several developers via donations.  Sometime in the
> early summer perhaps.
> 
>     Eric> For the backends, maybe it would be easier to let (-1,*,*,*)
>     Eric> mean "don't draw"; if it has to be interpreted by C-code in
>     Eric> some backends, always having a tuple and simply checking for
>     Eric> a negative first element is much easier than having to check
>     Eric> for None in place of a tuple.
> 
> If we are already passing in rgba, and are expecting the backends to
> inspect it, wouldn't it make more sense for them to simply check for
> rgba[-1]>0, as we do in backend_bases?

Yes, I think this is already fully supported by common backends, and it 
may be all that is needed.

Eric

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