Re: Adding support High Dynamic Range (HDR) imagery to HTML Canvas: a baseline proposal

On the Chrome side we've been in contact with +Christopher Cameron
<ccameron@google.com> on this. The proposal looks reasonable so far. In
terms of things salient to the Media WG, we should:
- Ensure VideoColorSpace properly converts when drawn into a HDR canvas.
Specifically that the outputs of video, VideoDecoder, and ImageDecoder map
correctly into destination spaces.
- Ensure high bit depth pixel formats work properly:
https://github.com/w3c/webcodecs/issues/384#issuecomment-1169230721

- dale

On Tue, Jun 27, 2023 at 9:33 PM Pierre-Anthony Lemieux <pal@sandflow.com>
wrote:

> (The message was intended for the MEIG... but we also wanted to get
> the Media WG's feedback, so below is the equivalent message for this
> group. Apologies for the confusion, I blame autocorrect.)
>
> Dear Media WG:
>
> The Color on the Web CG [1] would very much appreciate your feedback
> on the following strawman, which motivates and proposes baseline
> modifications to the HTML Canvas API to enable support for
> High-Dynamic Range (HDR) imagery:
>
>
> https://github.com/w3c/ColorWeb-CG/blob/8eac62f15e5b41940636beb031f6214b61e933af/hdr_html_canvas_element.md
>
> The proposed modifications allow the HTML Canvas API to manipulate
> High Dynamic Range (HDR) images expressed using the widespread BT.2100
> PQ and BT.2100 HLG color spaces, without precluding adding future HDR
> capabilities, such as support for additional color spaces like a
> linear high-dynamic range color space.
>
> Feedback can be provided at [2].
>
> Best,
>
> -- Color on the Web CG chairs
>
> [1] https://www.w3.org/community/colorweb/
> [2] https://github.com/w3c/ColorWeb-CG/issues
>
>
>
> On Tue, Jun 27, 2023 at 9:17 PM Pierre-Anthony Lemieux <pal@sandflow.com>
> wrote:
> >
> > Good morning/evening,
> >
> > Following-up on my presentation on April 25,  the Color on the Web CG
> > [1] would very much appreciate any feedback the MEIG might have on the
> > following strawman, which motivates and proposes baseline
> > modifications to the HTML Canvas API to enable support for
> > High-Dynamic Range (HDR) imagery:
> >
> >
> https://github.com/w3c/ColorWeb-CG/blob/8eac62f15e5b41940636beb031f6214b61e933af/hdr_html_canvas_element.md
> >
> > The proposed modifications allow the HTML Canvas API to manipulate
> > High Dynamic Range (HDR) images expressed using the widespread BT.2100
> > PQ and BT.2100 HLG color spaces, without precluding adding future HDR
> > capabilities, such as support for additional color spaces like a
> > linear high-dynamic range RGB color space.
> >
> > Best,
> >
> > -- Pierre [CG co-chair]
> >
> > [1] https://www.w3.org/community/colorweb/
>
>