Hi @madewokherd
It doesn't look like there's a concrete definition of a line. It seems like the general consensus is the font height so it doesn't look like we're going to get any further in determining a more precise line height going by conventional methods in Wine. It also doesn't look like Windows relies on font height either because, `TEXTMETRICS.tmHeight` is a long value but GdipMeasure*() methods always return real floating point values(with fractional parts). On top of that `tmHeight` and `GetTextExtentExPointW` return the same height which is the height of the font.
To me it looks like the only way around this would be to analyze glyph outlines(GetGlyphOutlineW) which is probably expensive. I don't know whether there could be another approach, though.
What do you think?