14766 – Should we allows shaders implemented as a special 'shader' WebWorker

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Bug 14766 - Should we allows shaders implemented as a special 'shader' WebWorker

Summary: Should we allows shaders implemented as a special 'shader' WebWorker

Status:	RESOLVED WONTFIX

Alias:	None

Product:	CSS
Classification:	Unclassified
Component:	Filter Effects (show other bugs)
Version:	unspecified
Hardware:	PC All

Importance:	P2 normal
Target Milestone:	---
Assignee:	Vincent Hardy
QA Contact:	This bug has no owner yet - up for the taking

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2011-11-10 21:45 UTC by Vincent Hardy
Modified:	2013-01-14 07:27 UTC (History)
CC List:	5 users (show)

See Also:

Attachments

Description Vincent Hardy 2011-11-10 21:45:22 UTC

See the discussion at:

http://lists.w3.org/Archives/Public/public-fx/2011OctDec/0108.html

Comment 1 Simon Fraser 2011-11-10 22:25:31 UTC

I don't see how running a shader on a web worker helps anything. You have to run them at paint time, and you're blocked waiting for painting then.

Comment 2 Charles Pritchard 2011-12-12 23:23:39 UTC

The "MediaStream Processing API" proposal offers an example of Workers for audio processing. The document does not tackle video processing though it does offer the idea of <canvas> processing in the examples section. It's noted that video data should be added in a subsequent draft to the ProcessMediaEvent.
https://dvcs.w3.org/hg/audio/raw-file/tip/streams/StreamProcessing.html#worker-processing

Shaders may be used for audio processing, this is an area where the CSS Shaders proposal and the MediaStream Processing API have some possible overlap. GLSL can be used for Audio effects, and JS can be used for image effects.

Comment 3 Dirk Schulze 2013-01-14 07:27:37 UTC

(In reply to comment #2)
> The "MediaStream Processing API" proposal offers an example of Workers for
> audio processing. The document does not tackle video processing though it
> does offer the idea of <canvas> processing in the examples section. It's
> noted that video data should be added in a subsequent draft to the
> ProcessMediaEvent.
> https://dvcs.w3.org/hg/audio/raw-file/tip/streams/StreamProcessing.
> html#worker-processing
> 
> Shaders may be used for audio processing, this is an area where the CSS
> Shaders proposal and the MediaStream Processing API have some possible
> overlap. GLSL can be used for Audio effects, and JS can be used for image
> effects.

I don't disagree that shaders as a technique can be used for GPGPU, but this is not the purpose of CSS Shaders. I agree with Simon that it does not make any sense to combine WebWorkers with CSS Shaders. I close this bug for now.