what to do about hangeul-unique vertical metrics and their relationship to the K embox and K line height #76
Description
In the klreq illustrations of line height and line leading, the fonts used show a traditional point-size embox being used as the line height, and the leading being measured from the embox edges. But what if the Hangeul font is not square, and has jamo regions that are non-traditional? these elements could leak outside the point-sized embox by design, but in that case the line height, leading measuring point, Latin baseline and x-height, and other alignment metrics could be affected. How should a square font being laid out on the same line as the non-square font? I think it would be useful to outline such edge cases so engines could elevate such new Hangeul fonts to first-class status and their metrics be defined in the standards.