Re: [jlreq] Example of central-baseline alignment of sideways-ed Latin glyphs within a vertical Japanese line box (#246)

Simply, historically, there is no 'baseline' for Japanese typography.
Read description of character frame (em square) of Japanese character, at https://www.w3.org/TR/jlreq/#kanji_hiragana_and_katakana, and understand that Japanese typography is based on 'character body' or em-square character frame but not baseline. 
IF you want to compare Japanese em-squared body with baseline used for european typography, you need to set some comparable level as baseline, the easiest way could be to use middle level - as half of em-square, due to limitation of european level definitions.
You can check some comparison of characters like https://html.spec.whatwg.org/images/baselines.png (note, there is a raised issue which points some of levels are wrongly named).

/cc @kidayasuo  if any additional information.

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Received on Thursday, 3 December 2020 19:01:45 UTC