Re: [PNG] Meeting topics - Jan 8th, 2024

Chris’s gain map proposal may be a bit premature…

As he notes in the GH thread, there is an experts meeting in Feb with TC42 and ICC experts (and others) around HDR (and gain maps).  Some of the proposals that are expected to be floated at that meeting will remove the need for format-centric gain map approaches.

Unless we have a need to more it forward more quickly – I’d hold off till after that.

Leonard

From: Chris Blume (ProgramMax) <programmax@gmail.com>
Date: Friday, January 5, 2024 at 11:54 AM
To: Portable Network Graphics (PNG) Working Group <public-png@w3.org>
Subject: [PNG] Meeting topics - Jan 8th, 2024

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Hello everyone,

Our next meeting is this coming Monday.
I know some people are still returning from their holiday and will be unable to attend. But we might still have critical mass.


Here are some thoughts we should cover:

  *   I have been informed that Safari does in fact support cICP. I'm going to try to update the Web Platform Test in a way that works for Safari. Perhaps I am currently doing something wrong.

With that in place (and the eXIf-order test I bludged), we might have checked all the major boxes to wrap up Third Edition. Chris Lilley, could you either reply here or in our upcoming meeting with what our next steps are to finish Third Edition?
  *   There are still a handful of issues listed under blocking-3rd-edition-cr<https://github.com/w3c/PNG-spec/issues?q=is%3Aissue+is%3Aopen+label%3Ablocking-3rd-edition-cr> and blocking-exit-3rd-ed-cr<https://github.com/w3c/PNG-spec/issues?q=is%3Aissue+is%3Aopen+label%3Ablocking-exit-3rd-ed-cr>.

     *   Are any of them hard blockers or are they just stylistic / would-be-nice?

        *   If the latter, push on any ones you want to get done before we hit a freeze.
        *   If the former, let's call them out and focus on them.

     *   Are there issues not yet labelled in there which should be blockers?

  *   Don't forget to review Chris Lilley's gain map proposal<https://github.com/w3c/PNG-spec/issues/380>. We'll talk about it in the meeting.

     *   I think it may be similar to other not-immediately-viewable-like-rgb channels (motion vectors, normal maps, etc.)

I hope you all had a great break. Talk to you Monday!