- local function prepare_extra_data(n, id)
- -- test if already loaded
- if type(id)=='number' then -- sometimes id is an integer
- return
- elseif (not id) or font_extra_info[n] then return
- end
- local fname = id.filename
- local bname = file.basename(fname)
- if not fname then
- font_extra_info[n] = {}; return
- elseif font_extra_basename[bname] then
- font_extra_info[n] = font_extra_basename[bname]; return
- end
- -- if the cache is present, read it
- local newsum = checksum(fname) -- MD5 checksum of the fontfile
- local v = "extra_" .. string.lower(file.nameonly(fname))
- local dat = ltjb.load_cache(v,
- function (t) return (t.version~=cache_ver) or (t.chksum~=newsum) end
- )
- -- if the cache is not found or outdated, save the cache
- if dat then
- font_extra_basename[bname] = dat[1] or {}
- else
- local dat = nil
- dat = prepare_vert_data(dat, id)
- dat = prepare_fl_data(dat, id, fname)
- font_extra_basename[bname] = dat or {}
- ltjb.save_cache( v,
- {
- chksum = checksum(fname),
- version = cache_ver,
- dat,
- })
- end
- font_extra_info[n] = font_extra_basename[bname]
- end
- luatexbase.add_to_callback('luatexja.define_font',
- function (res, name, size, id)
- prepare_extra_data(id, res)
- end,
- 'ltj.prepare_extra_data', 1)
+ local function prepare_extra_data_base(id)
+ if not id then return end
+ local bname = file.nameonly(id.filename or '')
+ if not font_extra_basename[bname] then
+ -- if the cache is present, read it
+ local newsum = checksum(id.filename) -- MD5 checksum of the fontfile
+ local v = "extra_" .. string.lower(file.nameonly(id.filename))
+ local dat = ltjb.load_cache(
+ v,
+ function (t) return (t.version~=cache_ver) or (t.chksum~=newsum) end
+ )
+ -- if the cache is not found or outdated, save the cache
+ if dat then
+ font_extra_basename[bname] = dat[1] or {}
+ else
+ local dat = nil
+ dat = prepare_vert_data(dat, id)
+ dat = prepare_fl_data(dat, id)
+ font_extra_basename[bname] = dat or {}
+ ltjb.save_cache( v,
+ {
+ chksum = checksum(id.filename),
+ version = cache_ver,
+ dat,
+ })
+ end
+ return bname
+ end
+ end
+ local function prepare_extra_data_font(id, res)
+ if type(res)=='table' and res.shared then
+ font_extra_info[id] = font_extra_basename[file.nameonly(res.filename)]
+ end
+ end
+ luatexbase.add_to_callback(
+ 'luaotfload.patch_font',
+ function (tfmdata)
+ -- these function is executed one time per one fontfile
+ local bname = prepare_extra_data_base(tfmdata)
+ if bname then supply_vkern_table(tfmdata, bname) end
+ end,
+ 'ltj.prepare_extra_data', 1)
+ luatexbase.add_to_callback(
+ 'luatexja.define_font',
+ function (res, name, size, id)
+ prepare_extra_data_font(id, res)
+ end,
+ 'ltj.prepare_extra_data', 1)