ISSUE-357 (horizontal in vertical): Add support for horizontal in vertical (tate-chu-yoko). [TTML2]

ISSUE-357 (horizontal in vertical): Add support for horizontal in vertical (tate-chu-yoko). [TTML2]

http://www.w3.org/AudioVideo/TT/tracker/issues/357

Raised by: Glenn Adams
On product: TTML2

In order to support Japanese subtitle and caption requirements, it is necessary to support horizontal in vertical layout 縦中横 'tate-chu-yoko'. The previously added tts:textOrientation is not sufficient to handle all use cases involving mixtures of horizontal and vertical text.

One solution is to define a textCombine style property based the text-combine-upright property defined by CSS Writing Modes Level 3 [1].

[1] http://dev.w3.org/csswg/css-writing-modes-3/#propdef-text-combine-upright

Received on Tuesday, 18 November 2014 16:21:08 UTC