ISSUE-231: Individual character rotation

Individual character rotation

Individual character rotation

State:
OPEN
Product:
TTML2
Raised by:
Pierre-Anthony Lemieux
Opened on:
2013-05-30
Description:
[The following is extracted from the liaison received from SMPTE at https://lists.w3.org/Archives/Member/w3c-archive/2012Sep/0214.html]

See Section 6.11 at ST 428-7.
It shall be possible to specify that each rendered character within a <span> element be individually rotated right or left around its center by 90 degrees.
Note: This is most common for special characters in an Asian text string that is being displayed vertically.
Related Actions Items:
No related actions
Related emails:
  1. {agenda} TTWG Meeting 2015-07-09 (from nigel.megitt@bbc.co.uk on 2015-07-08)
  2. Re: {agenda} TTWG Meeting 2015-07-02 (from nigel.megitt@bbc.co.uk on 2015-07-02)
  3. Re: {agenda} TTWG Meeting 2015-07-02 (from glenn@skynav.com on 2015-07-02)
  4. Re: {agenda} TTWG Meeting 2015-07-02 (from pal@sandflow.com on 2015-07-01)
  5. {agenda} TTWG Meeting 2015-07-02 (from nigel.megitt@bbc.co.uk on 2015-07-01)
  6. {agenda} TTWG Meeting 2015-06-11 (from nigel.megitt@bbc.co.uk on 2015-06-10)
  7. {agenda} TTWG Meeting 2015-06-04 (from nigel.megitt@bbc.co.uk on 2015-06-03)
  8. {agenda} TTWG Meeting 2015-05-28 (from nigel.megitt@bbc.co.uk on 2015-05-26)
  9. Re: {agenda} TTWG Meeting 2015-05-21 (from pal@sandflow.com on 2015-05-21)
  10. Re: {agenda} TTWG Meeting 2015-05-21 (from glenn@skynav.com on 2015-05-21)
  11. {agenda} TTWG Meeting 2015-05-21 (from nigel.megitt@bbc.co.uk on 2015-05-20)
  12. {agenda} TTWG Meeting 2015-05-14 (from nigel.megitt@bbc.co.uk on 2015-05-13)
  13. {minutes} TTWG Meeting 2015-05-07 (from nigel.megitt@bbc.co.uk on 2015-05-07)
  14. {agenda} TTWG Meeting 2015-05-07 (from nigel.megitt@bbc.co.uk on 2015-05-06)
  15. Re: {agenda} TTWG Meeting 2015-04-30 (from singer@apple.com on 2015-04-29)
  16. {agenda} TTWG Meeting 2015-04-30 (from nigel.megitt@bbc.co.uk on 2015-04-29)
  17. {agenda} TTWG Meeting 2015-04-23 (from nigel.megitt@bbc.co.uk on 2015-04-22)
  18. Re: {agenda} TTWG Meeting 2015-04-16 (from singer@apple.com on 2015-04-15)
  19. {agenda} TTWG Meeting 2015-04-16 (from nigel.megitt@bbc.co.uk on 2015-04-15)
  20. {agenda} TTWG Meeting 2015-04-02 (from nigel.megitt@bbc.co.uk on 2015-04-01)
  21. {agenda} TTWG Meeting 2015-03-26 (from nigel.megitt@bbc.co.uk on 2015-03-25)
  22. Re: [ttml2] Action-369 Action-382 - draft dispositions flattened thread incorporating changes (from nigel.megitt@bbc.co.uk on 2015-03-19)
  23. {agenda} TTWG Meeting 2015-03-19 (from nigel.megitt@bbc.co.uk on 2015-03-18)
  24. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from nigel.megitt@bbc.co.uk on 2015-03-18)
  25. Re: {agenda} TTWG Meeting 2015-03-12 (from glenn@skynav.com on 2015-03-11)
  26. {agenda} TTWG Meeting 2015-03-12 (from nigel.megitt@bbc.co.uk on 2015-03-11)
  27. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from glenn@skynav.com on 2015-03-05)
  28. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from nigel.megitt@bbc.co.uk on 2015-03-05)
  29. {agenda} TTWG Meeting 2015-03-05 (from nigel.megitt@bbc.co.uk on 2015-03-04)
  30. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from nigel.megitt@bbc.co.uk on 2015-03-04)
  31. {minutes} TTWG Meeting 2015-02-26 (from nigel.megitt@bbc.co.uk on 2015-02-26)
  32. {agenda} TTWG Meeting 2015-02-26 (from nigel.megitt@bbc.co.uk on 2015-02-25)
  33. {minutes} TTWG Meeting 2015-02-19 (from nigel.megitt@bbc.co.uk on 2015-02-19)
  34. Re: Change Proposal 21 review (from glenn@skynav.com on 2015-01-28)
  35. Re: Change Proposal 21 review (from pal@sandflow.com on 2015-01-28)
  36. {agenda} TTWG Meeting 2015-01-29 (from nigel.megitt@bbc.co.uk on 2015-01-28)
  37. Re: Change Proposal 21 review (from glenn@skynav.com on 2015-01-25)
  38. Change Proposal 21 review (from pal@sandflow.com on 2015-01-21)
  39. {minutes} 16/1/14 TTWG meeting (from nigel.megitt@bbc.co.uk on 2014-01-16)
  40. {agenda} 16/1/14 TTWG meeting (from nigel.megitt@bbc.co.uk on 2014-01-16)
  41. {minutes} 9/1/14 TTWG Meeting (from nigel.megitt@bbc.co.uk on 2014-01-09)
  42. TTWG Agenda for 9/1/14 (from nigel.megitt@bbc.co.uk on 2014-01-08)
  43. TTWG Agenda for 12/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-11)
  44. {minutes} TTML Meeting of 24/10/13 (from glenn@skynav.com on 2013-10-24)
  45. RE: TTML Agenda for 24/10/13 (from mdolan@newtbt.com on 2013-10-23)
  46. TTML Agenda for 24/10/13 (from nigel.megitt@bbc.co.uk on 2013-10-23)
  47. No Meeting today 12-09-13 (from Sean.Hayes@microsoft.com on 2013-09-12)
  48. Minutes for 05/09/13 (from nigel.megitt@bbc.co.uk on 2013-09-05)
  49. Agenda for 05/09/13 (from glenn@skynav.com on 2013-09-04)
  50. ISSUE-231 (Individual character rotation): Individual character rotation [TTML.next] (from sysbot+tracker@w3.org on 2013-05-30)

Related notes:

This appears to be a request to add the CSS3 Writing Mode text-orientation property (or an equivalent) [1].

[1] http://dev.w3.org/csswg/css-writing-modes/#text-orientation0

Glenn Adams, 30 May 2013, 20:16:50

[Sean]: relate this to 159

6 Jun 2013, 14:47:35

[glenn]: should be closed upon conclusion of action-204

19 Sep 2013, 14:51:56

Pal: P2

Philippe Le Hégaret, 24 Oct 2013, 15:43:32

Concluded with https://dvcs.w3.org/hg/ttml/rev/45150fa4ecd2.

Glenn Adams, 5 Dec 2013, 20:35:51

"glyphs from horizontal scripts are set sideways with 90° counter-clockwise rotation" --> looks good assuming that only horizontal scripts in otherwise vertical text ever need to be rotated. Is that true?

Pierre-Anthony Lemieux, 15 Jan 2014, 22:26:05

the described liaison cites as a use case the handling of horizontal text in a vertical writing mode context; that is the problem addressed by the solution; arbitrary rotation of a glyph can be viewed as a separate requirement, independently of the use case indicated; the proposed solution does not address arbitrary rotation, as no use case is indicated;

Glenn Adams, 25 Jan 2015, 20:40:06

> the described liaison cites as a use case the handling of
> horizontal text in a vertical writing mode context

Actually the liaison (Section 6.11 of ST 428-7) does not contain this limitation, but merely notes that "this is most commonly used to present special characters in a text string that is being displayed vertically."

Pierre-Anthony Lemieux, 29 Jan 2015, 02:31:03

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David Singer <singer@apple.com>, Nigel Megitt <nigel.megitt@bbc.co.uk>, Chairs, Thierry Michel <tmichel@w3.org>, Philippe Le Hégaret <plh@w3.org>, Atsushi Shimono <atsushi@w3.org>, Staff Contacts
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