RE: Compositing and Blending / canvas


The spec currently defines blending and compositing (with example
From: Dirk Schulze
Sent: 6/26/2013 8:29 AM
To: Rik Cabanier
Cc: Daniel Glazman;;
Subject: Re: Compositing and Blending / canvas

On Jun 26, 2013, at 7:50 AM, Rik Cabanier <> wrote:

> The plan was to update the Canvas 2D spec so it refers to the compositing and blending spec for the list.
> This would be similar to how the spec currently refers to CSS color.

Do you want to specify the compositing model in CSS Blending as well
and remove it from Canvas2D? I think the only confusing part is that
the values for the same property 'globalCompositeOperation' are
defined in different specs. Compositing still in Canvas2D and blending
partly in Canvas2D and partly in CSS Compositing.


> Rik
> ________________________________________
> From: Daniel Glazman []
> Sent: Wednesday, June 26, 2013 12:13 AM
> To:
> Cc:
> Subject: Compositing and Blending / canvas
> Dear HTML WG,
> The CSS WG's Compositing and Blending Level 1 spec (WD at this
> time) defines an extension to canvas [1]. We would like to ask
> for your review and feedback on how we should proceed here; on
> one hand, this extension clearly belongs to Blending but on
> another it could be better to have all canvas stuff defined in
> one single place, your documents. We don't have a strong opinion
> here, maybe the current situation is ok and we only need a few
> links.
> Best regards,
> [1]
> </Daniel>
> --
> W3C CSS Working Group, Co-chair

Received on Wednesday, 26 June 2013 16:05:23 UTC