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

[Werner LEMBERG]

Sorry for the late reply.

> I am still trying to work out some issues with glyph spacing and
> vertical fonts.  I have implemented the lsb/rsb_deltas for
> horizontal text and that seems to be working fine.  The issue I am
> now having is with some Japanese fonts that are intended to be drawn
> vertically with very little space between the glyphs.  Essentially,
> the spacing is really bad :( In some cases glyphs actually touch
> each other.  However, if I render with FT_LOAD_NO_HINTING then the
> spacing is fine.  I have some sample images here:
> http://www.ljug.com/vertsamples.html

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.  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.

> I made a feeble attempt to add tsb/bsb_delta values to my local copy
> of FreeType, but it didn't seem to make a difference.

Can you post a patch so that we can look at it?


    Werner