Hello,
a few corrections and annotations (the code, BTW, is taken from
the already mentioned wiki
<http://luatex.bluwiki.com/go/Use_a_TrueType_font>).
> mag = size / ttffont.units_per_em
This should be "local mag = size / ttffont.units_per_em".
> f.characters[char] = {
> index = glyph,
> width = glyph_table.width * mag,
> name = glyph_table.name,
> }
This does not set the height and depth of the character correctly,
which I found results in spacing errors before and after large
display maths. In my code, I have added:
if glyph_table.boundingbox[4] then
f.characters[char].height = glyph_table.boundingbox[4] *
mag
end
if glyph_table.boundingbox[2] then
f.characters[char].depth = -glyph_table.boundingbox[2] *
mag
end
> if glyph_table.kerns then
> local kerns = { }
> for _, kern in pairs(glyph_table.kerns)
> do
> kerns[names_of_char[kern.char]] = kern.off * mag
> end
> f.characters[char].kerns = kerns
> end
> end
> f.filename = filename
> f.type = 'real'
> f.format = fonttype
> f.embedding = "subset"
> f.cidinfo = {
> registry = "Adobe",
> ordering = "Identity",
> supplement = 0,
> version = 1
> }
> end
> else
> f = font.read_tfm(name, size)
> end
> return f
> end
> )
> }
Also note that the loaded font will not have any ligatures.
Jonathan
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