Re: ACTION-458: Create issue re: line height calculation for inline (Timed Text Working Group)

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Re: ACTION-458: Create issue re: line height calculation for inline (Timed Text Working Group)

Glenn Adams-2
Reminder to self. The issue here is as follows:

what line height (LH) applies to inline areas (IAs) generated by span, given that we have defined tts:lineHeight as not applying to span (only applies to p)? some possible answers:
  • LH(IA) := FS(IA), where FS denotes resolved font size
  • same as above except with some constant multiplier, e.g., 1.25 (=125%)
my current opinion is that the following holds or should hold:

LH(IA) := 1.0 * FS(IA)

note also that the following constraint should apply:

FS(IA) := ABS(TEXT-ALTITUDE(IA)) + ABS(TEXT-DEPTH(IA))

Q: what should happen if the font metrics are such that abs(altitude) + abs(depth) != 1em?


On Thu, Mar 31, 2016 at 8:40 AM, Timed Text Working Group Issue Tracker <[hidden email]> wrote:
ACTION-458: Create issue re: line height calculation for inlineĀ  (Timed Text Working Group)

http://www.w3.org/AudioVideo/TT/tracker/actions/458

On: Glenn Adams
Due: 2016-04-07
Product: TTML 1.0

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