W3C home > Mailing lists > Public > www-style@w3.org > October 2011

Re: [css-shaders] subdivision for transparency

From: Robert O'Callahan <robert@ocallahan.org>
Date: Wed, 5 Oct 2011 15:54:38 +1300
Message-ID: <CAOp6jLZ+Zm=Ngj9ujfSgbLGqQEzaUKX0Gp=PBW_N-Bko5049kA@mail.gmail.com>
To: "Gregg Tavares (wrk)" <gman@google.com>
Cc: Dean Jackson <dino@apple.com>, James Robinson <jamesr@google.com>, www-style list <www-style@w3.org>
On Wed, Oct 5, 2011 at 12:05 PM, Gregg Tavares (wrk) <gman@google.com>wrote:

> On Tue, Oct 4, 2011 at 3:35 PM, Robert O'Callahan <robert@ocallahan.org>wrote:
>> On Wed, Oct 5, 2011 at 9:13 AM, Dean Jackson <dino@apple.com> wrote:
>>> As for filters, I was really hoping that we'd be able to specify them as
>>> purely a 2d effect - as in whatever is composited in the end is a quad, not
>>> a mesh, even if the filter itself uses a mesh.
>> I totally agree. The result of a "custom" filter primitive is flattened to
>> an image. Nothing else makes sense, even within a filter chain
> That's fine in all you want to achieve is filtering effects but that
> doesn't fit with the examples shown by Adobe. They're morphing the content
> in 3d.
> http://www.adobe.com/devnet/html5/articles/css-shaders.html#1
> In one case they're morphing something to look like a newspaper. It unfolds
> but is still interactive once it unfolds.
> In another case they're morphing a twitter feed a kind of wavy shape and
> they are interacting with it while it's in this wavy shape. I don't see why
> the user would think it's not 100% interactive.
> So it seems like for this proposal to be generally useful that content
> needs to able to be interactive (ie, the user needs to able to click on
> stuff just like they can with 3d css). Otherwise the number of use cases for
> it seems exceedingly small.

Sure, and I just wrote a message about this on Vincent's original thread,
but it's an orthogonal issue to the treatment of z-values. We can have
filters affect the processing of events without requiring vertex-shader z
values propagate through the rendering pipeline.

"If we claim to be without sin, we deceive ourselves and the truth is not in
us. If we confess our sins, he is faithful and just and will forgive us our
sins and purify us from all unrighteousness. If we claim we have not sinned,
we make him out to be a liar and his word is not in us." [1 John 1:8-10]
Received on Wednesday, 5 October 2011 02:55:07 UTC

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