Re: [Dev-luatex] How to use an OpenType font.

1 Oct 2008


      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

Re: [Dev-luatex] How to use an OpenType font.

Jonathan Sauer