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

The design space of the font, defined in UPM, has been equivalent to the CJK embox (the design space used for ideographs, etc) in the case of square fonts. It is true that now the font design space is not necessarily the same dimension or aspect ratio of the CJK embox. Therefore, it is necessary for font developers to make use of the BASE table entries for the ideographic metrics, so the layout software can align glyphs to the correct embox metric (e.g. embox center alignment, or aligning square CJK fonts next to non-square fonts on the same line).

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Received on Friday, 12 May 2023 15:37:07 UTC