Re: [ft] lsb/rsb_delta and vertical text (again)

[Werner LEMBERG]

> > IMHO, the spacing for unhinted text you actually use is too tight.
> > Just look at the `上' glyph in the rightmost column: The base line
> > of this glyph gets overwritten by the glyph below.
> 
> Actually, I don't think that is true.  Take at look at the same
> glyph at the bottom of the column third from the left.  Notice that
> it is also missing the line across the bottom, even though it is the
> last character on the line.  I think this is just a general problem
> with drawing East Asian fonts with auto-hinting disabled.

This can easily be decided by using a higher resolution; then you'll
clearly see whether there is some overlapping or not.

> > Japanese companies like Morisawa provide special fonts intended
> > for tight vertical writing; essentially, those fonts are slightly
> > compressed vertically, together with a lot of vertical kerning
> > pairs.
> 
> Actually, I have such a font, but the metrics in it appear to be
> wrong.

Interesting.  You might analyze it with the ttx disassembler (from
fonttools.sf.net) and/or checking it with FontForge.


    Werner