Re: Wayland compositor color management model

Hi Pekka,

Thanks for sharing the document.

Can you provide a link to the description of the parameterization of
the "output image description"?

Best,

-- Pierre

On Fri, Sep 29, 2023 at 5:53 AM Pekka Paalanen
<pekka.paalanen@collabora.com> wrote:
>
> Hi all,
>
> the recent discussions with Simon Thompson and others have given me
> inspiration to think about how Wayland should account for in-display
> image adjustments which lead me to write
> https://gitlab.freedesktop.org/pq/color-and-hdr/-/merge_requests/35
>
> (Best viewed at
> https://gitlab.freedesktop.org/pq/color-and-hdr/-/blob/bb44957a29c49232c3f94530e92617f6e8fc9d36/doc/color-management-model.md
> )
>
> That concept may be useful also for the W3C, because it may well be
> what Linux desktop OSs offer to browsers in terms of color support.
>
> It starts by stating that a Wayland compositor will only convert
> display-referred signal to display-referred signal, but that is a
> little bit of a lie, because I do believe we will also support HLG.
> Therefore, when the image content or the monitor signal is in HLG, drop
> the unnecessary display and viewing condition referrals.
>
> We take care to consider also the traditional color management (ICC)
> use cases where exact light colorimetry must not be ruined with the
> perceptional conversions that are otherwise desired.
>
> I hope this can provide what browsers need. Any comments are welcome.
>
>
> Thanks,
> pq
>
> ps. I picked my nick in the 90s, it has nothing to do with perceptual
> quantizer. :-)

Received on Tuesday, 3 October 2023 17:58:43 UTC