Re: [css-masking] new value for 'mask-clip'

On Sat, Oct 27, 2012 at 12:19 AM, Dirk Schulze <dschulze@adobe.com> wrote:

> On Oct 26, 2012, at 11:23 AM, Robert O'Callahan <robert@ocallahan.org>
> wrote:
> >> On Fri, Oct 26, 2012 at 9:19 PM, Dirk Schulze <dschulze@adobe.com>
> wrote:
> >> The ellipse defined by this image would clip on the border box of the
> container. In absolute coordinates: cx=100, cy=100, rx=100, ry=100. Even
> with a value 'mask-clip: none', the ellipse would be the size of the
> container and clip to the border box of the container. But in the case
> above, you may want the ellipse mask the the whole group and not just the
> container.
> >
> > In CSS you can't do anything with that "whole group box". It doesn't
> really exist as a concept. (Except, arguably, influencing what you can
> scroll to in a scrollable container.) I'm not sure we want to introduce it
> just for the sake of masking here.
>
> That is not correct, we do it for Filter Effects already. And even Firefox
> does it for mask, clip-path, filter. It is the union of all border boxes of
> all descendants and the element itself, like the rect for
> getComputedBoundingRect.
>

OK, good point. :-)

Rob
-- 
“You have heard that it was said, ‘Love your neighbor and hate your enemy.’
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