[MPEG-OTSPEC] Draft AHG report for your review

Mon Jan 11 15:45:42 CET 2021

Good call, that is much clearer.

On 2021-01-09 09:34, Peter Constable wrote:
>
> Vlad:
>
> Another late comment—something to consider in the WG discussion: While 
> re-reading the draft text for 5.7.11.1.6, there are references to 
> “source in” and “source out” compositing modes that aren’t set apart 
> typographically, and that makes the wording a bit confusing. For 
> example, “The same effects can be implemented… by… selecting the 
> source in composite mode.”
>
> In the proposed WD content in the Google Fonts repo, I’ve made changes 
> to the typography so that the compositing mode names are always 
> italicized and follow the capitalization in the W3C doc; this makes 
> the meaning in the text clearer. The above example becomes, “… by… 
> selecting the /Source In /composite mode.” You can see the specific 
> changes in this commit:
>
> https://github.com/googlefonts/colr-gradients-spec/commit/2938cb91372f4bfbd2460139131f09bcf9687be3#diff-f8c59e8d70f0a695574ea35269cf5f70c46db8cc40daa2d5e128e8c79be10528 
> <https://github.com/googlefonts/colr-gradients-spec/commit/2938cb91372f4bfbd2460139131f09bcf9687be3#diff-f8c59e8d70f0a695574ea35269cf5f70c46db8cc40daa2d5e128e8c79be10528>
>
> Peter
>
> *From:* mpeg-otspec <mpeg-otspec-bounces at lists.aau.at> *On Behalf Of 
> *Vladimir Levantovsky
> *Sent:* Friday, January 8, 2021 2:40 PM
> *To:* 'MPEG OT Spec list' <mpeg-otspec at lists.aau.at>
> *Subject:* Re: [MPEG-OTSPEC] Draft AHG report for your review
>
> Folks,
>
> I have not received any responses / comments on the draft AHG report – 
> it will be presented as is.
>
> Also, for the next week’s breakout session on Font Format work – so 
> far I’ve got the following topics we need to cover to finalize the 
> text of the amendment:
>
>   * In 5.7.11.1.2.1 Color Lines: when it comes to color interpolation,
>     currently the spec says that color values along the color line are
>     linearly interpolated – is this enough?
>   * In 5.7.11.1.2.2 Linear Gradients: the description of the gradient
>     and rotation vectors, and effects the rotation vector has on the
>     final results are underspecified. Issues that need additional
>     clarifications include
>     a) rotation effect on color interpolation results if the angular
>     distance between gradient orientation vector and rotation vector
>     are more than 90 degrees in either direction (CW or CCW), and
>     b) what effect , if any, the magnitude of the rotation vector has.
>     (Currently, the spec is silent about it.)
>   * In 5.7.11.1.2.3 Radial Gradients: what is the expected behavior in
>     case where both circles overlap with r > 0?
>   * In 5.7.11.1.2.3 Radial Gradients: specify the expected behavior in
>     case where a transform flattens both circles and their centers to
>     a line.
>   * In 5.7.11.4 COLR table and OFF font variations – discuss and
>     incorporate the proposed changes
>     <https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fgooglefonts%2Fcolr-gradients-spec%2Fcommit%2F9cfbcaefc88f487b547431b62dfab22ee743d9b8%3Fshort_path%3Df8c59e8%23diff-f8c59e8d70f0a695574ea35269cf5f70c46db8cc40daa2d5e128e8c79be10528&data=04%7C01%7C%7C78bfaa9cdc704f11c56808d8b4265b9d%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637457424142250657%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Zn4ENHOcALtXtMvURnSMQKg%2FgLBbShw4dVNhJLRJ5jo%3D&reserved=0>
>     in the last two paragraphs.
>
> If anything is missing from this list, please let me know.
>
> Thank you,
>
> Vladimir
>
> *From:* Vladimir Levantovsky [mailto:vladimir.levantovsky at gmail.com 
> <mailto:vladimir.levantovsky at gmail.com>]
> *Sent:* Wednesday, January 6, 2021 7:47 PM
> *To:* 'MPEG OT Spec list' <mpeg-otspec at lists.aau.at 
> <mailto:mpeg-otspec at lists.aau.at>>
> *Subject:* Draft AHG report for your review
> *Importance:* High
>
> Dear all,
>
> Please see attached the draft of the AHG report that I will present at 
> the upcoming MPEG Systems (SC29/WG3) meeting next week (Jan. 11 – 15). 
> Your comments are appreciated.
>
> We do have a number of open issues that need to be resolved in order 
> to finalize COLR v1 specification – it would be best if these issues 
> are resolved by next week, and discussed as part of the Font Format 
> break-out group session during the WG meeting. Currently, this 
> break-out session is tentatively scheduled on January 13 at 21:00 UTC. 
> We will be using one of the available ISO Zoom rooms; however, the 
> meeting access information will only be available to WG members and 
> cannot be shared publicly.
>
> I would like to bring your attention to the specific part of the AHG 
> Recommendations section where a promotion of the current Working Draft 
> to the next PDAM stage is suggested (last paragraph, also 
> highlighted). The final outcome related to document promotion will 
> likely be determined based on the results of the WG discussions. Our 
> possible options are to either keep the document as the Working Draft 
> and finalize all remaining issues before the next  WG meeting in early 
> April, or to recommend promoting the document to the next PDAM stage, 
> and address the remaining _/minor/_ issues as part of the ballot 
> comments. I’d like to remind you that in order to be able to process 
> the ballot in time for the next meeting, it will likely be published 
> as two-months ballot, and the time period for submission of comments 
> will be very short (most National Bodies require comments to be 
> submitted at least three weeks prior to ballot closing date).
>
> Please respond to this email with any proposed changes and corrections 
> to the AHG report by the end of day Friday, Jan. 8^th – No comments 
> will be interpreted as approval!
>
> Thank you,
>
> Vladimir
>
>
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-- 
Chris Lilley
@svgeesus
Technical Director @ W3C
W3C Strategy Team, Core Web Design
W3C Architecture & Technology Team, Core Web & Media

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