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Re: [filter-effects] @support condition for custom filters

From: Dirk Schulze <dschulze@adobe.com>
Date: Mon, 11 Feb 2013 18:00:21 -0800
To: James Robinson <jamesr@google.com>
CC: www-style list <www-style@w3.org>
Message-ID: <D0800FD7-EE81-4D99-BE16-6EF05BDE2020@adobe.com>

On Feb 11, 2013, at 5:55 PM, James Robinson <jamesr@google.com> wrote:

> On Mon, Feb 11, 2013 at 3:05 PM, Dirk Schulze <dschulze@adobe.com> wrote:
> Hi all,
> The Filter Effects[1] specification defines the custom() filter function to extend the predefined filters by new, customized filters including CSS Shaders, but not limited to CSS Shaders. This was discussed and accepted by the SVG WG [2].
> Feature detection is important to support future extensions of the spec and test for the availability. I have an action from the SVG WG to ask for a new condition 'filter' on the @support rule. This filter descriptor can take different feature keywords. For CSS Shaders I would suggest 'webgl' because of the relation to WebGL. More feature keywords can be added by future versions of Filter Effects allowing other or future shading languages and parameterized SVG filters. The filter condition would look like in the following demonstration:
> Supporting webgl and supporting CSS shaders are very different things and I would not expect support for one to imply or match support of the other.  I think you should pick a different keyword.

I am happy with a different keyword as well. This name was proposed during the F2F, since CSS Shaders use the by WebGL defined shader language (GLSL ES with restrictions). In theory you can use a different shading language to archive the same results. I am open for other name proposals.


> - James
Received on Tuesday, 12 February 2013 02:00:49 UTC

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