Re: [clreq] Fullwidth is not equivalent to em (#511)

This means that the UPM design space (normally the same height as the point size of the font) can differ from the CJK embox (c.f. some squat-looking Chinese fonts, or in the same of variable fonts that change both height and width). It is necessary for layout software to support alignment of glyphs on different baselines, not only on the glyph origin (Roman baseline). We will be explaining these issues more in the [JLReq](https://www.w3.org/TR/jlreq/) so support of non-square or variable CJK fonts can be complete.

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Received on Friday, 12 May 2023 15:40:45 UTC