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[ttml2] tts:fontSize single length value specifies both height and width

From: Nigel Megitt via GitHub <sysbot+gh@w3.org>
Date: Wed, 10 Jan 2018 07:11:05 +0000
To: public-tt@w3.org
Message-ID: <issues.opened-287335340-1515568263-sysbot+gh@w3.org>
nigelmegitt has just created a new issue for https://github.com/w3c/ttml2:

== tts:fontSize single length value specifies both height and width ==
One of two points arising from w3c/ttml1#301

The language in tts:fontSize:

> If a single `<length>` value is specified, then this length applies equally to the horizontal and vertical size of a glyph's EM square; if two `<length>` values are specified, then the first expresses the horizontal size and the second expresses vertical size.

is not clear enough. What it means is that the value _specifies_ or _defines_ both the horizontal and vertical size - the words "applies" and "expresses" are used instead in the same paragraph to mean the same thing, and neither is quite right.

Suggest rewording to:

_If a single `<length>` value is specified, then this length defines equally both the horizontal and vertical size of a glyph's EM square; if two `<length>` values are specified, then the first defines the horizontal size and the second defines the vertical size._

I would potentially be happy with other wording as long as the same is used in both and it is clear that the specified value is setting the em square size.

Please view or discuss this issue at https://github.com/w3c/ttml2/issues/548 using your GitHub account
Received on Wednesday, 10 January 2018 07:11:12 UTC

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