Clearly define attribute 'height' as used herein

[tbrowder]

Does the 'height' attribute apply to the individual glyph or to the entire set of glyphs?

If it is line height, then it should not be an individual glyph attribute. The glyph height could be called 'char-' or 'glyph-height', but I would just eliminate it as a glyph attribute.

As a face attribute, 'height' would be as FreeType defines 'external leading' or 'line gap': the difference between baselines. It might be useful to alias 'height' to 'line-height'.

FreeType documention is somewhat loose with some of its definitions, but its C code is better. A table comparing the various attributes in code versus its documentation would be very helpful.

[tbrowder]

Disregard for now.