font-size-adjust Inaccuracy

[Stanimir Stamenkov]

Following "Example V" from the current CSS Fonts Level 3 [1] draft:

http://www.w3.org/TR/2009/WD-css3-fonts-20090618/#relative-sizing-the-font-size-adjust-pro

I've extended the example to compare how the value I determine from
aligning the big type box borders affects the normal size type. I'm
trying this on Windows XP Pro SP3 and I've determined
font-size-adjust of 0.52 to match the aspect value of the "Arial"
font family I've used in my example (see attached). I'm noticing
the normal type - one with font-size-adjust applied and the other
with none, (almost) always differ in size/appearance. Is this
inaccuracy an expected effect from using font-size-adjust, or?

[1] http://www.w3.org/TR/css3-fonts/

--
Stanimir

[Stanimir Stamenkov]

Mon, 12 Apr 2010 06:02:43 -0700 (PDT), /John Daggett/:

> This looks like a bug, when the boxes line up with large text you
> should have accurately determined the aspect ratio which should be
> applicable at smaller sizes.
>
> Could you file a bug when you have a chance?

I hope I've picked up the right component:

https://bugzilla.mozilla.org/show_bug.cgi?id=558893

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Stanimir