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Re: Utility of background-composite and background-blend-mode?

From: L. David Baron <dbaron@dbaron.org>
Date: Thu, 14 Mar 2013 12:06:43 -0700
To: Rik Cabanier <cabanier@gmail.com>
Cc: Simon Fraser <smfr@me.com>, Dirk Schulze <dschulze@adobe.com>, "robert@ocallahan.org" <robert@ocallahan.org>, "public-fx@w3.org" <public-fx@w3.org>
Message-ID: <20130314190643.GA22573@crum.dbaron.org>
On Thursday 2013-03-14 11:21 -0700, Rik Cabanier wrote:
> On Thu, Mar 14, 2013 at 11:04 AM, Simon Fraser <smfr@me.com> wrote:
> > I'm confused about background-blend-mode, and the spec <
> > https://dvcs.w3.org/hg/FXTF/rawfile/tip/compositing/index.html#background-blend-mode>
> > is not helping.
> >
> > Does it blend with anything in other elements, or only between the
> > background images/background color of the element to which it's applied?
> >
> > The spec's use of "the background images at a lower z-index." is confusing
> > here. Is that "the background images of elements at a lower z-index", or
> > "later  background images of the element"?
> >
> > If it's only within elements and not between them, I don't see why it
> > matters whether position:fixed creates a group.
> >
> >
> From the spec:
> 
> Each background image will blend with the element's background and the
> background images at a lower z-index
> 
> 
> So, it will blend between elements.

Pointing to one piece of the spec to say another piece of the spec
is wrong isn't sufficient here.  If you want people to review the
concepts you're proposing, the spec needs to be clear about what
those concepts are.

-David

-- 
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                           http://www.mozilla.org/   𝄂
Received on Thursday, 14 March 2013 19:07:15 GMT

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