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_jchar_class = luatexbase.attributes['ltj@charclass']
28 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
29 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
31 local ltjf_font_metric_table = ltjf.font_metric_table
32 local ltjf_find_char_class = ltjf.find_char_class
33 local ltjr_cidfont_data = ltjr.cidfont_data
34 local ltjc_is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char
36 local OTF = luatexja.userid_table.OTF
38 local function get_ucs_from_rmlgbm(c)
39 local v = ltjr_cidfont_data["Adobe-Japan1"].resources.unicodes["Japan1." .. tostring(c)]
40 if not v then -- AJ1 範囲外
42 elseif v<0xF0000 then -- 素直に Unicode にマップ可能
45 local w = ltjr_cidfont_data["Adobe-Japan1"].characters[v]. tounicode
47 local i = string.len(w)
51 i,w = tonumber(string.sub(w,1,4),16), tonumber(string.sub(w,-4),16)
52 if (w>=0xD800) and (w<=0xDB7F) and (i>=0xDC00) and (i<=0xDFFF) then -- Surrogate pair
53 return (w-0xD800)*0x400 + (i-0xDC00)
61 -- Append a whatsit node to the list.
62 -- This whatsit node will be extracted to a glyph_node
63 local function append_jglyph(char)
64 local p = node_new(id_whatsit,sid_user)
65 local v = tex.attribute[attr_curjfnt]
66 p.user_id=OTF; p.type=100; p.value=char
67 set_attr(p, attr_yablshift, tex.attribute[attr_ykblshift])
71 local function cid(key)
72 if key==0 then return append_jglyph(char) end
73 local curjfnt = identifiers[tex.attribute[attr_curjfnt]]
74 if not curjfnt.cidinfo or
75 curjfnt.cidinfo.ordering ~= "Japan1" and
76 curjfnt.cidinfo.ordering ~= "GB1" and
77 curjfnt.cidinfo.ordering ~= "CNS1" and
78 curjfnt.cidinfo.ordering ~= "Korea1" then
79 -- ltjb.package_warning('luatexja-otf',
80 -- 'Current Japanese font (or other CJK font) "'
81 -- ..curjfnt.psname..'" is not a CID-Keyed font (Adobe-Japan1 etc.)')
82 return append_jglyph(get_ucs_from_rmlgbm(key))
84 local char = curjfnt.resources.unicodes[curjfnt.cidinfo.ordering..'.'..tostring(key)]
86 ltjb.package_warning('luatexja-otf',
87 'Current Japanese font (or other CJK font) "'
88 ..curjfnt.psname..'" does not have the specified CID character ('
90 'Use a font including the specified CID character.')
93 return append_jglyph(char)
96 local function extract(head)
100 if p.id==id_whatsit then
101 if p.subtype==sid_user and p.user_id==OTF then
102 local g = node_new(id_glyph)
103 g.subtype = 0; g.char = p.value
104 v = has_attr(p, attr_curjfnt); g.font = v
105 set_attr(g, attr_curjfnt, v)
106 v = has_attr(p, attr_yablshift)
108 set_attr(g, attr_yablshift, v)
110 unset_attr(g, attr_yablshift)
112 head = node_insert_after(head, p, g)
113 head = node_remove(head, p)
122 luatexbase.add_to_callback('hpack_filter',
123 function (head) return extract(head) end,'ltj.hpack_filter_otf',
124 luatexbase.priority_in_callback('pre_linebreak_filter',
125 'ltj.pre_linebreak_filter'))
126 luatexbase.add_to_callback('pre_linebreak_filter',
127 function (head) return extract(head) end, 'ltj.pre_linebreak_filter_otf',
128 luatexbase.priority_in_callback('pre_linebreak_filter',
129 'ltj.pre_linebreak_filter'))
132 -- additional callbacks
133 -- 以下は,LuaTeX-ja に用意された callback のサンプルになっている.
134 -- 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.
135 -- 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
136 -- CID <-> グリフ 対応状況による変換テーブルが用意される.
138 -- 和文フォント読み込み時に,CID -> unicode 対応をとっておく.
139 local function cid_to_char(fmtable, fn)
140 local fi = identifiers[fn]
141 if fi.cidinfo and fi.cidinfo.ordering == "Japan1" then
142 fmtable.cid_char_type = {}
143 for i, v in pairs(fmtable.chars) do
144 local j = string.match(i, "^AJ1%-([0-9]*)")
146 j = tonumber(fi.resources.unicodes['Japan1.'..tostring(j)])
148 fmtable.cid_char_type[j] = v
155 luatexbase.add_to_callback("luatexja.define_jfont",
156 cid_to_char, "ltj.otf.define_jfont", 1)
157 -- 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
158 for fn, v in pairs(ltjf_font_metric_table) do
159 ltjf_font_metric_table[fn] = cid_to_char(v, fn)
163 local function cid_set_char_class(arg, fmtable, char)
164 if arg~=0 then return arg
165 elseif fmtable.cid_char_type then
166 return fmtable.cid_char_type[char] or 0
170 luatexbase.add_to_callback("luatexja.find_char_class",
171 cid_set_char_class, "ltj.otf.find_char_class", 1)
173 -------------------- IVS
174 local font_ivs_table = {} -- key: fontnumber
177 local is_ivs_enabled = false
178 local ivs -- temp table
179 local sort = table.sort
181 local function add_ivs_table(tg, unitable)
182 for gu, gv in pairs(tg) do
185 for _,at in pairs(ga) do
186 local bu, vsel = at.unicode, (at.variant or -1)
188 if vsel>=0xE0100 then vsel = vsel - 0xE0100 end
189 if not ivs[bu] then ivs[bu] = {} end
191 for i,_ in pairs(ivs[bu]) do
192 if i==vs then uniq_flag = false; break end
195 ivs[bu][vsel] = unitable[gv.name]
202 local function make_ivs_table(id, fname)
204 local fl = fontloader.open(fname)
205 local ft = fontloader.to_table(fl)
206 local unicodes = id.resources.unicodes
207 add_ivs_table(ft.glyphs, id.resources.unicodes)
209 for _,v in pairs(ft.subfonts) do
210 add_ivs_table(v.glyphs, id.resources.unicodes)
217 -- loading and saving
218 local font_ivs_basename = {} -- key: basename
220 local checksum = file.checksum
222 local function prepare_ivs_data(n, id)
223 -- test if already loaded
224 if type(id)=='number' then -- sometimes id is an integer
225 font_ivs_table[n] = font_ivs_table[id]; return
227 local fname = id.filename
228 local bname = file.basename(fname)
230 font_ivs_table[n] = {}; return
231 elseif font_ivs_basename[bname] then
232 font_ivs_table[n] = font_ivs_basename[bname]; return
235 -- if the cache is present, read it
236 local newsum = checksum(fname) -- MD5 checksum of the fontfile
237 local v = "ivs_" .. string.lower(file.nameonly(fname))
238 local dat = ltjb.load_cache(v,
239 function (t) return (t.version~=cache_ver) or (t.chksum~=newsum) end
241 -- if the cache is not found or outdated, save the cache
243 font_ivs_basename[bname] = dat[1] or {}
245 dat = make_ivs_table(id, fname)
246 font_ivs_basename[bname] = dat or {}
249 chksum = checksum(fname),
254 font_ivs_table[n] = font_ivs_basename[bname]
258 local function ivs_jglyph(char, bp, pf)
259 local p = node_new(id_whatsit,sid_user)
260 p.user_id=OTF; p.type=100; p.value=char
261 set_attr(p, attr_curjfnt, pf)
262 set_attr(p, attr_yablshift, has_attr(bp, attr_ykblshift) or 0)
266 local function do_ivs_repr(head)
270 if pid==id_glyph then
272 if (has_attr(p, attr_curjfnt) or 0) == pf then
273 -- only works with JAchars
274 local pt = font_ivs_table[pf]
275 local q = node_next(p) -- the next node of p
276 if q and q.id==id_glyph then
278 if (qc>=0xFE00 and qc<=0xFE0F) or (qc>=0xE0100 and qc<0xE01F0) then
279 -- q is a variation selector
280 if qc>=0xE0100 then qc = qc - 0xE0100 end
281 pt = pt and pt[p.char]; pt = pt and pt[qc]
282 head = node_remove(head,q)
284 local np = ivs_jglyph(pt, p, pf)
285 head = node_insert_after(head, p, np)
286 head = node_remove(head,p)
299 local function font_callback(name, size, id, fallback)
300 local d = fallback(name, size, id)
301 prepare_ivs_data(id, d)
305 enable_ivs = function ()
306 if is_ivs_enabled then
307 ltjb.package_warning('luatexja-otf',
308 'luatexja.otf.enable_ivs() was already called, so this call is ignored', '')
310 luatexbase.add_to_callback('hpack_filter',
311 function (head) return do_ivs_repr(head) end,'do_ivs', 1)
312 luatexbase.add_to_callback('pre_linebreak_filter',
313 function (head) return do_ivs_repr(head) end, 'do_ivs', 1)
314 local ivs_callback = function (name, size, id)
315 return font_callback(
317 function (name, size, id) return luatexja.font_callback(name, size, id) end
320 luatexbase.add_to_callback('define_font',ivs_callback,"luatexja.ivs_font_callback", 1)
321 for i=1,font.nextid()-1 do
322 if identifiers[i] then prepare_ivs_data(i, identifiers[i]) end
324 is_ivs_enabled = true
330 append_jglyph = append_jglyph,
331 enable_ivs = enable_ivs, -- 隠し機能: IVS
332 font_ivs_table = font_ivs_table,