2 -- luatexja/ltj-otf.lua
7 luatexja.load_module('base'); local ltjb = luatexja.base
8 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
9 luatexja.load_module('rmlgbm'); local ltjr = luatexja.rmlgbm
10 luatexja.load_module('charrange'); local ltjc = luatexja.charrange
12 local id_glyph = node.id('glyph')
13 local id_whatsit = node.id('whatsit')
14 local sid_user = node.subtype('user_defined')
16 local node_new = node.new
17 local node_remove = node.remove
18 local node_next = node.next
19 local node_free = node.free
20 local has_attr = node.has_attribute
21 local set_attr = node.set_attribute
22 local unset_attr = node.unset_attribute
23 local node_insert_after = node.insert_after
24 local identifiers = fonts.hashes.identifiers
26 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
27 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
28 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
30 local ltjf_font_metric_table = ltjf.font_metric_table
31 local ltjf_find_char_class = ltjf.find_char_class
32 local ltjr_cidfont_data = ltjr.cidfont_data
33 local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
35 luatexja.userid_table.OTF = luatexbase.newuserwhatsitid('char_by_cid', 'luatexja')
36 luatexja.userid_table.VSR = luatexbase.newuserwhatsitid('replace_vs', 'luatexja')
37 local OTF, VSR = luatexja.userid_table.OTF, luatexja.userid_table.VSR
39 local function get_ucs_from_rmlgbm(c)
40 local v = ltjr_cidfont_data["Adobe-Japan1"].resources.unicodes["Japan1." .. tostring(c)]
41 if not v then -- AJ1 範囲外
43 elseif v<0xF0000 then -- 素直に Unicode にマップ可能
46 local w = ltjr_cidfont_data["Adobe-Japan1"].characters[v]. tounicode
48 local i = string.len(w)
52 i,w = tonumber(string.sub(w,1,4),16), tonumber(string.sub(w,-4),16)
53 if (w>=0xD800) and (w<=0xDB7F) and (i>=0xDC00) and (i<=0xDFFF) then -- Surrogate pair
54 return (w-0xD800)*0x400 + (i-0xDC00)
62 -- Append a whatsit node to the list.
63 -- This whatsit node will be extracted to a glyph_node
64 local function append_jglyph(char)
65 local p = node_new(id_whatsit,sid_user)
66 local v = tex.attribute[attr_curjfnt]
67 p.user_id=OTF; p.type=100; p.value=char
68 set_attr(p, attr_yablshift, tex.attribute[attr_ykblshift])
72 local function cid(key)
73 if key==0 then return append_jglyph(char) end
74 local curjfnt = identifiers[tex.attribute[attr_curjfnt]]
75 if not curjfnt.cidinfo or
76 curjfnt.cidinfo.ordering ~= "Japan1" and
77 curjfnt.cidinfo.ordering ~= "GB1" and
78 curjfnt.cidinfo.ordering ~= "CNS1" and
79 curjfnt.cidinfo.ordering ~= "Korea1" then
80 -- ltjb.package_warning('luatexja-otf',
81 -- 'Current Japanese font (or other CJK font) "'
82 -- ..curjfnt.psname..'" is not a CID-Keyed font (Adobe-Japan1 etc.)')
83 return append_jglyph(get_ucs_from_rmlgbm(key))
85 local char = curjfnt.resources.unicodes[curjfnt.cidinfo.ordering..'.'..tostring(key)]
87 ltjb.package_warning('luatexja-otf',
88 'Current Japanese font (or other CJK font) "'
89 ..curjfnt.psname..'" does not have the specified CID character ('
91 'Use a font including the specified CID character.')
94 return append_jglyph(char)
97 local function extract(head)
101 if p.id==id_whatsit then
102 if p.subtype==sid_user then
103 local puid = p.user_id
104 if puid==OTF or puid==VSR then
105 local g = node_new(id_glyph)
106 g.subtype = 0; g.char = p.value
107 v = has_attr(p, attr_curjfnt); g.font = v
108 set_attr(g, attr_curjfnt,
109 puid==OTF and v or 0)
111 v = has_attr(p, attr_yablshift)
113 set_attr(g, attr_yablshift, v)
115 unset_attr(g, attr_yablshift)
117 head = node_insert_after(head, p, g)
118 head = node_remove(head, p)
128 luatexbase.add_to_callback('hpack_filter',
129 function (head) return extract(head) end,'ltj.hpack_filter_otf',
130 luatexbase.priority_in_callback('pre_linebreak_filter',
131 'ltj.pre_linebreak_filter'))
132 luatexbase.add_to_callback('pre_linebreak_filter',
133 function (head) return extract(head) end, 'ltj.pre_linebreak_filter_otf',
134 luatexbase.priority_in_callback('pre_linebreak_filter',
135 'ltj.pre_linebreak_filter'))
138 -- additional callbacks
139 -- 以下は,LuaTeX-ja に用意された callback のサンプルになっている.
140 -- JFM の文字クラスの指定の所で,"AJ1-xxx" 形式での指定を可能とした.
141 -- これらの文字指定は,和文フォント定義ごとに,それぞれのフォントの
142 -- CID <-> グリフ 対応状況による変換テーブルが用意される.
144 -- 和文フォント読み込み時に,CID -> unicode 対応をとっておく.
145 local function cid_to_char(fmtable, fn)
146 local fi = identifiers[fn]
147 if fi.cidinfo and fi.cidinfo.ordering == "Japan1" then
148 fmtable.cid_char_type = {}
149 for i, v in pairs(fmtable.chars) do
150 local j = string.match(i, "^AJ1%-([0-9]*)")
152 j = tonumber(fi.resources.unicodes['Japan1.'..tostring(j)])
154 fmtable.cid_char_type[j] = v
161 luatexbase.add_to_callback("luatexja.define_jfont",
162 cid_to_char, "ltj.otf.define_jfont", 1)
163 -- 既に読み込まれているフォントに対しても,同じことをやらないといけない
164 for fn, v in pairs(ltjf_font_metric_table) do
165 ltjf_font_metric_table[fn] = cid_to_char(v, fn)
169 local function cid_set_char_class(arg, fmtable, char)
170 if arg~=0 then return arg
171 elseif fmtable.cid_char_type then
172 return fmtable.cid_char_type[char] or 0
176 luatexbase.add_to_callback("luatexja.find_char_class",
177 cid_set_char_class, "ltj.otf.find_char_class", 1)
179 -------------------- IVS
180 local font_ivs_table = {} -- key: fontnumber
183 local is_ivs_enabled = false
184 local ivs -- temp table
185 local sort = table.sort
187 local function add_ivs_table(tg, unitable)
188 for gu, gv in pairs(tg) do
191 for _,at in pairs(ga) do
192 local bu, vsel = at.unicode, (at.variant or -1)
194 if vsel>=0xE0100 then vsel = vsel - 0xE0100 end
195 if not ivs[bu] then ivs[bu] = {} end
197 for i,_ in pairs(ivs[bu]) do
198 if i==vs then uniq_flag = false; break end
201 ivs[bu][vsel] = unitable[gv.name]
208 local function make_ivs_table(id, fname)
210 local fl = fontloader.open(fname)
211 local ft = fontloader.to_table(fl)
212 local unicodes = id.resources.unicodes
213 add_ivs_table(ft.glyphs, id.resources.unicodes)
215 for _,v in pairs(ft.subfonts) do
216 add_ivs_table(v.glyphs, id.resources.unicodes)
223 -- loading and saving
224 local font_ivs_basename = {} -- key: basename
226 local checksum = file.checksum
228 local function prepare_ivs_data(n, id)
229 -- test if already loaded
230 if type(id)=='number' then -- sometimes id is an integer
231 font_ivs_table[n] = font_ivs_table[id]; return
232 elseif not id then return
234 local fname = id.filename
235 local bname = file.basename(fname)
237 font_ivs_table[n] = {}; return
238 elseif font_ivs_basename[bname] then
239 font_ivs_table[n] = font_ivs_basename[bname]; return
242 -- if the cache is present, read it
243 local newsum = checksum(fname) -- MD5 checksum of the fontfile
244 local v = "ivs_" .. string.lower(file.nameonly(fname))
245 local dat = ltjb.load_cache(v,
246 function (t) return (t.version~=cache_ver) or (t.chksum~=newsum) end
248 -- if the cache is not found or outdated, save the cache
250 font_ivs_basename[bname] = dat[1] or {}
252 dat = make_ivs_table(id, fname)
253 font_ivs_basename[bname] = dat or {}
256 chksum = checksum(fname),
261 font_ivs_table[n] = font_ivs_basename[bname]
265 local function ivs_jglyph(char, bp, pf, uid)
266 local p = node_new(id_whatsit,sid_user)
267 p.user_id=uid; p.type=100; p.value=char
268 set_attr(p, attr_curjfnt, pf)
269 set_attr(p, attr_yablshift, has_attr(bp, attr_ykblshift) or 0)
273 local function do_ivs_repr(head)
277 if pid==id_glyph then
279 local q = node_next(p) -- the next node of p
280 if q and q.id==id_glyph then
282 if (qc>=0xFE00 and qc<=0xFE0F) or (qc>=0xE0100 and qc<0xE01F0) then
283 -- q is a variation selector
284 if qc>=0xE0100 then qc = qc - 0xE0100 end
285 local pt = font_ivs_table[pf]
286 pt = pt and pt[p.char]; pt = pt and pt[qc]
287 head = node_remove(head,q)
289 local np = ivs_jglyph(pt, p, pf,
290 (has_attr(p,attr_curjfnt) or 0)==pf and OTF or VSR)
291 head = node_insert_after(head, p, np)
292 head = node_remove(head,p)
304 local function font_callback(name, size, id, fallback)
305 local d = fallback(name, size, id)
306 prepare_ivs_data(id, d)
310 enable_ivs = function ()
311 if is_ivs_enabled then
312 ltjb.package_warning('luatexja-otf',
313 'luatexja.otf.enable_ivs() was already called, so this call is ignored', '')
315 luatexbase.add_to_callback('hpack_filter',
316 function (head) return do_ivs_repr(head) end,'do_ivs', 1)
317 luatexbase.add_to_callback('pre_linebreak_filter',
318 function (head) return do_ivs_repr(head) end, 'do_ivs', 1)
319 local ivs_callback = function (name, size, id)
320 return font_callback(
322 function (name, size, id) return luatexja.font_callback(name, size, id) end
325 luatexbase.add_to_callback('define_font',ivs_callback,"luatexja.ivs_font_callback", 1)
326 for i=1,font.nextid()-1 do
327 if identifiers[i] then prepare_ivs_data(i, identifiers[i]) end
329 is_ivs_enabled = true
335 append_jglyph = append_jglyph,
336 enable_ivs = enable_ivs, -- 隠し機能: IVS
337 font_ivs_table = font_ivs_table,