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[Bug 17257] New: WebVTT: make vertical text default to upright

From: <bugzilla@jessica.w3.org>
Date: Thu, 31 May 2012 00:11:45 +0000
To: public-texttracks@w3.org
Message-ID: <bug-17257-5018@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=17257

           Summary: WebVTT: make vertical text default to upright
           Product: TextTracks CG
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: WebVTT
        AssignedTo: ian@hixie.ch
        ReportedBy: silviapfeiffer1@gmail.com
         QAContact: dave.null@w3.org
                CC: mike@w3.org, public-texttracks@w3.org


Right now, WebVTT specifies that text can be rendered vertically by using the
"vertical" cue setting and a value of "rl" or "lr". This is mapped to the CSS
specification of "writing-mode" with a value of "vertical-rl" or "vertical-lr".

http://dev.w3.org/csswg/css3-writing-modes/

The CSS3 spec seems to default vertically rendered text's line orientation to
the default one for that font, essentially leaving it to the browser whether to
write text upright or sideways.

My suggestion is therefore to require the CSS interpretation of "vertical" to
also contain "text-orientation: upright" as the default.

Then, we probably also need to introduce a cue setting for text-orientation to
allow sideways rendering if needed.

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Received on Thursday, 31 May 2012 00:11:48 GMT

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