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--
-- luatexja/otf.lua
--
luatexbase.provides_module({
name = 'luatexja.otf',
date = '2013/05/11',
description = 'The OTF Lua module for LuaTeX-ja',
})
luatexja.load_module('base'); local ltjb = luatexja.base
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
luatexja.load_module('rmlgbm'); local ltjr = luatexja.rmlgbm
local id_glyph = node.id('glyph')
local id_whatsit = node.id('whatsit')
local sid_user = node.subtype('user_defined')
local node_new = node.new
local node_remove = node.remove
local node_next = node.next
local node_free = node.free
local has_attr = node.has_attribute
local set_attr = node.set_attribute
local unset_attr = node.unset_attribute
local node_insert_after = node.insert_after
local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
local attr_jchar_class = luatexbase.attributes['ltj@charclass']
local attr_yablshift = luatexbase.attributes['ltj@yablshift']
local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
local ltjf_font_metric_table = ltjf.font_metric_table
local ltjf_find_char_class = ltjf.find_char_class
local ltjr_cidfont_data = ltjr.cidfont_data
local OTF = luatexja.userid_table.OTF
local function get_ucs_from_rmlgbm(c)
local v = ltjr_cidfont_data["Adobe-Japan1"].resources.unicodes["Japan1." .. tostring(c)]
if not v then -- AJ1 範囲外
return 0
elseif v<0xF0000 then -- 素直に Unicode にマップ可能
return v
else
local w = ltjr_cidfont_data["Adobe-Japan1"].characters[v]. tounicode
-- must be non-nil!
local i = string.len(w)
if i==4 then -- UCS2
return tonumber(w,16)
elseif i==8 then
i,w = tonumber(string.sub(w,1,4),16), tonumber(string.sub(w,-4),16)
if (w>=0xD800) and (w<=0xDB7F) and (i>=0xDC00) and (i<=0xDFFF) then -- Surrogate pair
return (w-0xD800)*0x400 + (i-0xDC00)
else
return 0
end
end
end
end
-- Append a whatsit node to the list.
-- This whatsit node will be extracted to a glyph_node
local function append_jglyph(char)
local p = node_new(id_whatsit,sid_user)
local v = tex.attribute[attr_curjfnt]
p.user_id=OTF; p.type=100; p.value=char
set_attr(p, attr_yablshift, tex.attribute[attr_ykblshift])
node.write(p)
end
local function cid(key)
if key==0 then return append_jglyph(char) end
local curjfnt = fonts.hashes.identifiers[tex.attribute[attr_curjfnt]]
if not curjfnt.cidinfo or
curjfnt.cidinfo.ordering ~= "Japan1" and
curjfnt.cidinfo.ordering ~= "GB1" and
curjfnt.cidinfo.ordering ~= "CNS1" and
curjfnt.cidinfo.ordering ~= "Korea1" then
-- ltjb.package_warning('luatexja-otf',
-- 'Current Japanese font (or other CJK font) "'
-- ..curjfnt.psname..'" is not a CID-Keyed font (Adobe-Japan1 etc.)')
return append_jglyph(get_ucs_from_rmlgbm(key))
end
local char = curjfnt.resources.unicodes[curjfnt.cidinfo.ordering..'.'..tostring(key)]
if not char then
ltjb.package_warning('luatexja-otf',
'Current Japanese font (or other CJK font) "'
..curjfnt.psname..'" does not have the specified CID character ('
..tostring(key)..')',
'Use a font including the specified CID character.')
char = 0
end
return append_jglyph(char)
end
local function extract(head)
local p = head
local v
while p do
if p.id==id_whatsit then
if p.subtype==sid_user and p.user_id==OTF then
local g = node_new(id_glyph)
g.subtype = 0; g.char = p.value
v = has_attr(p, attr_curjfnt); g.font = v
set_attr(g, attr_curjfnt, v)
v = has_attr(p, attr_yablshift)
if v then
set_attr(g, attr_yablshift, v)
else
unset_attr(g, attr_yablshift)
end
head = node_insert_after(head, p, g)
head = node_remove(head, p)
node_free(p); p = g
end
end
p = node_next(p)
end
return head
end
luatexbase.add_to_callback('hpack_filter',
function (head) return extract(head) end,'ltj.hpack_filter_otf',
luatexbase.priority_in_callback('pre_linebreak_filter',
'ltj.pre_linebreak_filter'))
luatexbase.add_to_callback('pre_linebreak_filter',
function (head) return extract(head) end, 'ltj.pre_linebreak_filter_otf',
luatexbase.priority_in_callback('pre_linebreak_filter',
'ltj.pre_linebreak_filter'))
-- additional callbacks
-- 以下は，LuaTeX-ja に用意された callback のサンプルになっている．
-- 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．
-- 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
-- CID <-> グリフ 対応状況による変換テーブルが用意される．
-- 和文フォント読み込み時に，CID -> unicode 対応をとっておく．
local function cid_to_char(fmtable, fn)
local fi = fonts.hashes.identifiers[fn]
if fi.cidinfo and fi.cidinfo.ordering == "Japan1" then
fmtable.cid_char_type = {}
for i, v in pairs(fmtable.chars) do
local j = string.match(i, "^AJ1%-([0-9]*)")
if j then
j = tonumber(fi.resources.unicodes['Japan1.'..tostring(j)])
if j then
fmtable.cid_char_type[j] = v
end
end
end
end
return fmtable
end
luatexbase.add_to_callback("luatexja.define_jfont",
cid_to_char, "ltj.otf.define_jfont", 1)
-- 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
for fn, v in pairs(ltjf_font_metric_table) do
ltjf_font_metric_table[fn] = cid_to_char(v, fn)
end
local function cid_set_char_class(arg, fmtable, char)
if arg~=0 then return arg
elseif fmtable.cid_char_type then
return fmtable.cid_char_type[char] or 0
else return 0
end
end
luatexbase.add_to_callback("luatexja.find_char_class",
cid_set_char_class, "ltj.otf.find_char_class", 1)
-------------------- all done
luatexja.otf = {
append_jglyph = append_jglyph,
cid = cid,
}
-- EOF
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