------------------------------------------------------------------------
font_extra_info = {}
local font_extra_info = font_extra_info -- key: fontnumber
+local font_extra_basename = {} -- key: basename
-- IVS and vertical metrics
local prepare_fl_data
+local supply_vkern_table
do
-
local fields = fontloader.fields
local function glyph_vmetric(glyph)
local flds = fields(glyph)
- local vw, tsb = nil, nil
+ local vw, tsb, vk = nil, nil, nil
for _,i in ipairs(flds) do
if i=='vwidth' then vw = glyph.vwidth end
if i=='tsidebearing' then tsb = glyph.tsidebearing end
+ if i=='vkerns' then vk = glyph.vkerns end
end
- return vw, tsb
+ return vw, tsb, vk
end
-
+
local sort = table.sort
local function add_fl_table(dest, tg, unitable, glyphmax, asc_des, units)
for i = 0, glyphmax-1 do
end
end
end
- local vw, tsb = glyph_vmetric(gv)
- if vw and vw~=asc_des then
+ -- vertical metric
+ local vw, tsb, vk = glyph_vmetric(gv)
local gi = unitable[gv.name]
- -- We do not use tsidebearing, since fontloader does not read
- -- VORG table. We assume that vertical origin == ascender
+ if vw and vw~=asc_des then
+ -- We do not use tsidebearing, since (1) fontloader does not read VORG table
+ -- and (2) 'tsidebearing' doea not appear in the returned table by fontloader.fields.
+ -- Hence, we assume that vertical origin == ascender
-- (see capsule_glyph_tate in ltj-setwidth.lua)
dest = dest or {}; dest[gi] = dest[gi] or {}
dest[gi].vwidth = vw/units
end
+ -- vertical kern
+ if vk then
+ dest = dest or {};
+ local dest_vk = dest.vkerns or {}; dest.vkerns = dest_vk
+ for _,v in pairs(vk) do
+ dest_vk[v.lookup] = dest_vk[v.lookup] or {}
+ dest_vk[v.lookup][gi] = dest_vk[v.lookup][gi] or {}
+ dest_vk[v.lookup][gi][unitable[v.char]] = v.off
+ end
+ end
end
end
return dest
end
- prepare_fl_data = function (dest, id, fname)
- local fl = fontloader.open(fname)
+ prepare_fl_data = function (dest, id)
+ local fl = fontloader.open(id.filename)
local unicodes = id.resources.unicodes
if fl.glyphs then
dest = add_fl_table(dest, fl.glyphs, id.resources.unicodes, fl.glyphmax,
fontloader.close(fl)
return dest
end
+ -- supply vkern table
+ supply_vkern_table = function(id, bname)
+ local bx = font_extra_basename[bname].vkerns
+ local lookuphash = id.resources.lookuphash
+ local desc = id.shared.rawdata.descriptions
+ if bx then
+ for i,v in pairs(bx) do
+ lookuphash[i] = lookuphash[i] or v
+ for j,w in pairs(v) do
+ desc[j].kerns = desc[j].kerns or {}
+ desc[j].kerns[i] = w
+ end
+ end
+ end
+ end
end
-- 縦書き用字形への変換テーブル
if type(v.slookups)=='table' then
local s = v.slookups[tname]
if s then
- if not dest then dest = {} end
- if not dest[i] then dest[i] = {} end
+ dest = dest or {}
+ dest[i] = dest[i] or {}
dest[i].vert = dest[i].vert or s
end
end
--
do
- local font_extra_basename = {} -- key: basename
- local cache_ver = 2
+ local cache_ver = 3
local checksum = file.checksum
- 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)
local function a (n, dat) font_extra_info[n] = dat end
ltjr.vert_addfunc = a
local identifiers = fonts.hashes.identifiers
for i=1,font.nextid()-1 do
- if identifiers[i] then prepare_extra_data(i, identifiers[i]) end
+ if identifiers[i] then
+ prepare_extra_data_base(identifiers[i])
+ prepare_extra_data_font(i,identifiers[i])
+ end
end
end
+
+------------------------------------------------------------------------
+-- calculate vadvance
+------------------------------------------------------------------------
+do
+ local function acc_feature(table_vadv, subtables, ft)
+ for char_num,v in pairs(ft.shared.rawdata.descriptions) do
+ if v.slookups then
+ for sn, sv in pairs(v.slookups) do
+ if subtables[sn] and type(sv)=='table' and sv[4]~=0 then
+ table_vadv[char_num]
+ = (table_vadv[char_num] or 0) + sv[4]
+ end
+ end
+ end
+ end
+ end
+
+luatexbase.add_to_callback(
+ "luatexja.define_jfont",
+ function (fmtable, fnum)
+ local vadv = {}; fmtable.v_advance = vadv
+ local ft = font_getfont(fnum)
+ local subtables = {}
+ if ft.specification then
+ for feat_name,v in pairs(ft.specification.features.normal) do
+ if v then
+ for _,i in pairs(ft.resources.sequences) do
+ if i.order[1]== feat_name and i.type == 'gpos_single' then
+ for _,st in pairs(i.subtables) do
+ subtables[st] = true
+ end
+ end
+ end
+ end
+ end
+ acc_feature(vadv, subtables, ft)
+ for i,v in pairs(vadv) do
+ vadv[i]=vadv[i]/ft.units_per_em*fmtable.size
+ end
+ end
+ return fmtable
+ end, 1, 'ltj.v_advance'
+)
+end
------------------------------------------------------------------------
-- MISC
------------------------------------------------------------------------
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