W3C home > Mailing lists > Public > www-svg@w3.org > May 2011

Re: SVG Compositing + 3D Transform

From: Rik Cabanier <cabanier@gmail.com>
Date: Mon, 16 May 2011 11:49:22 -0700
Message-ID: <BANLkTinLjdqVfF1ftd67g9k6L-T1Rryi6Q@mail.gmail.com>
To: Dirk Schulze <vbs85@gmx.de>
Cc: www-svg List <www-svg@w3.org>
As you can tell, the combination of transform, z-index and compositing is
currently not well specified.
SVG compositing has concepts like the canvas and enable-background while CSS
has concepts like 3D and z-index.

One of the stickiest points is 'enable-background: accumulate' where the
background is pulled in during the compositing operation. As you and Robert
O'Callahan point out, this will be hard when subsequent content will be at a
lower z-index.
Maybe we just need to get rid of this concept and introduce a new
'create-new-canvas' keyword. Also, every group with a comp-op would
implicitly have this new keyword.

On Mon, May 16, 2011 at 12:19 AM, Dirk Schulze <vbs85@gmx.de> wrote:

> Hi www-svg,
> I have a short question about combining the new specifications 3D Transform
> and Compositing (and maybe z-index as well). Isn't it possible that the
> source graphic could be placed behind the destination graphic with 3D
> Transforms? How would that influence the compositing of both graphics?
> Dirk
Received on Monday, 16 May 2011 18:49:49 UTC

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