- From: fantasai via GitHub <sysbot+gh@w3.org>
- Date: Wed, 01 Jul 2020 20:18:20 +0000
- To: public-css-archive@w3.org
Fwiw, current spec text is > Equal to the used x-height of the first available font [CSS3-FONTS]. The x-height is so called because it is often equal to the height of the lowercase "x". However, an ex is defined even for fonts that do not contain an "x". The x-height of a font can be found in different ways. Some fonts contain reliable metrics for the x-height. If reliable font metrics are not available, UAs may determine the x-height from the height of a lowercase glyph. One possible heuristic is to look at how far the glyph for the lowercase "o" extends below the baseline, and subtract that value from the top of its bounding box. In the cases where it is impossible or impractical to determine the x-height, a value of 0.5em must be assumed. -- GitHub Notification of comment by fantasai Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/5243#issuecomment-652625835 using your GitHub account
Received on Wednesday, 1 July 2020 20:18:23 UTC