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Re: Updated CSS shaders proposal

From: Chris Marrin <cmarrin@apple.com>
Date: Thu, 20 Oct 2011 10:43:02 -0700
Cc: www-style list <www-style@w3.org>, "public-fx@w3.org" <public-fx@w3.org>, SVG WG <public-svg-wg@w3.org>
Message-id: <9036F5D1-F3D8-4F07-B518-2C835AF4A58A@apple.com>
To: Vincent Hardy <vhardy@adobe.com>

On Oct 19, 2011, at 9:23 AM, Vincent Hardy wrote:

> Hello,
> I have updated the CSS shaders proposal:
> https://dvcs.w3.org/hg/FXTF/raw-file/tip/custom/index.html (you may need to force a reload to see the Oct. 19th version).
> the changelog is at:
> https://dvcs.w3.org/hg/FXTF/raw-file/tip/custom/index.html#october-19-2011
> This accounts for some of the feedback received so far. Other feedback is captured at issues (see http://www.w3.org/Graphics/fx/wiki/Custom_Filters#Issues_List).
> This also adds a way to control whether or not the triangles in the shader mesh are 'attached' or 'detached', to enable a wider array of effect.

Thanks for the update. Great progress. A couple of comments:

- Make sure you consistently use the term "fragment shader" rather than "pixel shader".

- I'm concerned that you say in section 6.2, "This document recommends the adoption on GLSL ES for alignment with shaders in WebGL". I think it would be more clear to say something like "This document recommends the adoption of the subset of GLSL ES defined in the WebGL 1.0 specification." I know that gives it even more of a WebGL slant and this may be my prejudice talking. But that seems like the most clear way to state the recommendation.

- Regarding Note 12: I think the spec should use the mime-type of the url() or <script> as the type identifier. I also think it should require WebGL support and define the mime-types for WebGL vertex and fragment shaders. This still allows implementations to support other shading languages using platform specific mime-types. The reason I'm pushing so hard for WebGL (other than the obvious reasons) is that I really want this to be a consistent feature on all browsers, and WebGL is the only web standard for shaders available. 

Received on Thursday, 20 October 2011 17:44:03 UTC

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