W3C home > Mailing lists > Public > www-style@w3.org > September 2016

HDR slides was: Discuss HDR at CSS WG next week ?

From: Pierre-Anthony Lemieux <pal@sandflow.com>
Date: Wed, 21 Sep 2016 12:07:07 +0100
Message-ID: <CAF_7JxDkCN2ihDCsZMq5YNbC37c4d4ZPbRsR+TAMCD1WN9=nrg@mail.gmail.com>
To: www-style list <www-style@w3.org>
Cc: Chris Lilley <chris@w3.org>, Rik Cabanier <cabanier@gmail.com>
FYI. Below is a link to the two slides presented during Monday's
meeting, incorporating clarifications based on feedback since then.

https://drive.google.com/file/d/0B_OQLEGiaO-Rd1FRU25nRjRBMnc/view?usp=sharing

Best,

-- Pierre

P.S.: Thanks again for finding time in the agenda on such short notice.

On Tue, Sep 20, 2016 at 4:48 PM, Rik Cabanier <cabanier@gmail.com> wrote:
>
>
> On Tue, Sep 20, 2016 at 2:08 PM, Chris Lilley <chris@w3.org> wrote:
>>
>>
>>
>> On 2016-09-20 13:53, Mark Watson wrote:
>>
>>
>> I think the two things which came up specifically with the color
>> specification were:
>> (i) the predefined "dci-p3" profile is mis-named. There should be some
>> changes to clarify that this is not DCI P3, but rather a profile defined in
>> this specification which makes used of the DCI P3 color primaries. You could
>> call it "web-p3" or "display-p3" or whetever.
>>
>> Yes, agreed. i discussed that with Dean from Apple today, he is sending me
>> an ICC profile that defines it. And certainly it needs to be renamed.
>>
>> (ii) when the update to iccMax is done, it would be good to have at least
>> one predefined profile for HDR (e.g. BT.2100 / PQ), especially since I heard
>> at least one implementor say they did not intend to implement arbitrary ICC
>> profiles, but rather just the predefined ones
>>
>>
>> Yes, also agreed (but that will likely be in a later version of the spec,
>> because IccMax is a bit early to rely on while ICC v.4 is mature).
>>
>> It is certainly possible to start a css color 5 as a placeholder for that
>> sort of thing, in parallel with css color 4 development.
>>
>>
>> The question of where to map the SDR / sRGB luminance range when
>> compositing with HDR is unsolved. It may be that for consistent results
>> across platforms this needs to be specified.
>>
>> Yes. That would likely be in a new level of the compositing spec.
>>
>> But there needs to be a period of experimentation on that before we could
>> conclude either that specification is needed or that CSS color is a good
>> place to specify it.
>>
>>
>> Yes.
>
>
> Chris, can you open these as issues on https://github.com/w3c/csswg-drafts
> so that we don't lose track of them?
Received on Wednesday, 21 September 2016 11:08:00 UTC

This archive was generated by hypermail 2.4.0 : Friday, 25 March 2022 10:09:04 UTC