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|
--
-- luatexja/jfont.lua
--
luatexbase.provides_module({
name = 'luatexja.jfont',
date = '2016/04/03',
description = 'Loader for Japanese fonts',
})
module('luatexja.jfont', package.seeall)
luatexja.load_module('base'); local ltjb = luatexja.base
luatexja.load_module('charrange'); local ltjc = luatexja.charrange
luatexja.load_module('rmlgbm'); local ltjr = luatexja.rmlgbm
luatexja.load_module('direction'); local ltjd = luatexja.direction
local setfield = node.direct.setfield
local getid = node.direct.getid
local to_direct = node.direct.todirect
local node_new = node.direct.new
local node_free = node.direct.free
local has_attr = node.direct.has_attribute
local set_attr = node.direct.set_attribute
local round = tex.round
local font_getfont = font.getfont
local attr_icflag = luatexbase.attributes['ltj@icflag']
local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
local attr_curtfnt = luatexbase.attributes['ltj@curtfnt']
local id_glyph = node.id('glyph')
local id_kern = node.id('kern')
local cat_lp = luatexbase.catcodetables['latex-package']
local FROM_JFM = luatexja.icflag_table.FROM_JFM
------------------------------------------------------------------------
-- LOADING JFM
------------------------------------------------------------------------
metrics={} -- this table stores all metric informations
font_metric_table={} -- [font number] -> jfm_name, jfm_var, size
luatexbase.create_callback("luatexja.load_jfm", "data", function (ft, jn) return ft end)
local jfm_file_name, jfm_var, jfm_ksp
local defjfm_res
local jfm_dir, is_def_jfont, is_vert_enabled
local function norm_val(a)
if (not a) or (a==0.) then
return nil
elseif a==true then
return 1
else
return a
end
end
function define_jfm(t)
local real_char -- Does current character class have the 'real' character?
if t.dir~=jfm_dir then
defjfm_res= nil; return
elseif type(t.zw)~='number' or type(t.zh)~='number' then
defjfm_res= nil; return
end
t.version = (type(t.version)=='number') and t.version or 1
t.char_type = {}; t.chars = {}
for i,v in pairs(t) do
if type(i) == 'number' then -- char_type
if not v.chars then
if i ~= 0 then defjfm_res= nil; return end
else
for j,w in pairs(v.chars) do
if type(w) == 'number' and w~=-1 then
elseif type(w) == 'string' and utf.len(w)==1 then
w = utf.byte(w)
elseif type(w) == 'string' and utf.len(w)==2 and utf.sub(w,2) == '*' then
w = utf.byte(utf.sub(w,1,1))
end
if not t.chars[w] then
t.chars[w] = i
else
defjfm_res= nil; return
end
end
v.chars = nil
end
if type(v.align)~='string' then
v.align = 'left' -- left
end
if type(v.width)~='number' then
v.width = (jfm_dir=='tate') and 1.0
end
if type(v.height)~='number' then
v.height = (jfm_dir=='tate') and 0.0
end
if type(v.depth)~='number' then
v.depth = (jfm_dir=='tate') and 0.0
end
if type(v.italic)~='number' then
v.italic = 0.0
end
if type(v.left)~='number' then
v.left = 0.0
end
if type(v.down)~='number' then
v.down = 0.0
end
if t.version>=2 then
if v.end_stretch then defjfm_res= nil; return end
if v.end_shrink then defjfm_res= nil; return end
if v.end_adjust then
if type(v.end_adjust)~='table' then
v.end_adjust = nil
elseif #(v.end_adjust)==0 then
v.end_adjust = nil
else
table.sort(v.end_adjust)
end
end
else
v.end_adjust = nil
if v.end_stretch and v.end_stretch~=0.0 then
v.end_adjust = (v.end_adjust or {})
v.end_adjust[#(v.end_adjust)+1] = v.end_stretch
end
if v.end_shrink and v.end_ahrink~=0.0 then
v.end_adjust = (v.end_adjust or {})
v.end_adjust[#(v.end_adjust)+1] = -v.end_shrink
end
if v.end_adjust then v.end_adjust[#(v.end_adjust)+1] = 0.0 end
end
v.kern = v.kern or {}; v.glue = v.glue or {}
for j,x in pairs(v.glue) do
if v.kern[j] then defjfm_res= nil; return end
x.ratio, x[5] = (x.ratio or (x[5] and 0.5*(1+x[5]) or 0.5)), nil
do
local xp
xp, x[4] = (x.priority or x[4]), nil
if type(xp)=='table' and t.version>=2 then
if type(xp[1])~='number' or xp[1]<-4 or xp[1]>3 then defjfm_res=nil end -- stretch
if type(xp[2])~='number' or xp[2]<-4 or xp[2]>3 then defjfm_res=nil end -- shrink
xp = (xp[1]+4)*8+(xp[2]+4)
elseif xp and type(xp)~='number' then
defjfm_res = nil
else
xp = (xp or 0)*9+36
if xp<0 or xp>=64 then defjfm_res=nil end
end
x.priority = xp
end
x.kanjiskip_natural = norm_val(x.kanjiskip_natural)
x.kanjiskip_stretch = norm_val(x.kanjiskip_stretch)
x.kanjiskip_shrink = norm_val(x.kanjiskip_shrink)
end
for j,x in pairs(v.kern) do
if type(x)=='number' then
v.kern[j] = {x, 0.5}
elseif type(x)=='table' then
v.kern[j] = { x[1], ratio=x.ratio or (x[2] and 0.5*(1+x[2]) or 0.5) }
end
end
t.char_type[i] = v
t[i] = nil
end
end
t = luatexbase.call_callback("luatexja.load_jfm", t, jfm_file_name)
t.size_cache = {}
defjfm_res = t
end
local update_jfm_cache
do
local function mult_table(old,scale) -- modified from table.fastcopy
if old then
local new = { }
for k,v in next, old do
if type(v) == "table" then
new[k] = mult_table(v,scale)
elseif type(v) == "number" then
new[k] = round(v*scale)
else
new[k] = v
end
end
return new
else return nil end
end
update_jfm_cache = function (j,sz)
if metrics[j].size_cache[sz] then return end
local t = {}
metrics[j].size_cache[sz] = t
t.chars = metrics[j].chars
t.char_type = mult_table(metrics[j].char_type, sz)
for i,v in pairs(t.char_type) do
v.align = (v.align=='left') and 0 or
((v.align=='right') and 1 or 0.5)
if type(i) == 'number' then -- char_type
for k,w in pairs(v.glue) do
v[k] = {
nil,
ratio=w.ratio/sz,
priority=FROM_JFM + w.priority/sz,
width = w[1], stretch = w[2], shrink = w[3],
kanjiskip_natural = w.kanjiskip_natural and w.kanjiskip_natural/sz,
kanjiskip_stretch = w.kanjiskip_stretch and w.kanjiskip_stretch/sz,
kanjiskip_shrink = w.kanjiskip_shrink and w.kanjiskip_shrink/sz,
}
end
for k,w in pairs(v.kern) do
local g = node_new(id_kern, 1)
setfield(g, 'kern', w[1])
set_attr(g, attr_icflag, FROM_JFM)
v[k] = {g, ratio=w[2]/sz}
end
end
v.glue, v.kern = nil, nil
end
t.kanjiskip = mult_table(metrics[j].kanjiskip, sz)
t.xkanjiskip = mult_table(metrics[j].xkanjiskip,sz)
t.zw = round(metrics[j].zw*sz)
t.zh = round(metrics[j].zh*sz)
t.size = sz
end
end
luatexbase.create_callback("luatexja.find_char_class", "data",
function (arg, fmtable, char)
return 0
end)
do
local start_time_measure = ltjb.start_time_measure
local stop_time_measure = ltjb.stop_time_measure
local fcc_temp = { chars_cbcache = {} }
setmetatable(
fcc_temp.chars_cbcache,
{
__index = function () return 0 end,
})
function find_char_class(c,m)
-- c: character code, m:
local r = (m or fcc_temp).chars_cbcache[c]
if not r then
r = m.chars[c] or
luatexbase.call_callback("luatexja.find_char_class", 0, m, c)
m.chars_cbcache[c or 0] = r
end
return r
end
end
------------------------------------------------------------------------
-- LOADING JAPANESE FONTS
------------------------------------------------------------------------
do
local cstemp
local global_flag -- true if \globaljfont, false if \jfont
local function load_jfont_metric()
if jfm_file_name=='' then
ltjb.package_error('luatexja',
'no JFM specified',
'To load and define a Japanese font, a JFM must be specified.'..
"The JFM 'ujis' will be used for now.")
jfm_file_name='ujis'
end
for j,v in ipairs(metrics) do
if v.name==jfm_file_name then return j end
end
luatexja.load_lua('jfm-' .. jfm_file_name .. '.lua')
if defjfm_res then
defjfm_res.name = jfm_file_name
table.insert(metrics, defjfm_res)
return #metrics
else
return nil
end
end
-- EXT
local utf8 = unicode.utf8
function jfontdefX(g, dir, csname)
jfm_dir, is_def_jfont = dir, true
cstemp = csname:sub( (utf8.byte(csname,1,1) == tex.escapechar) and 2 or 1, -1)
cstemp = cstemp:sub(1, ((cstemp:sub(-1,-1)==' ') and (cstemp:len()>=2)) and -2 or -1)
global_flag = g and '\\global' or ''
tex.sprint(cat_lp, '\\expandafter\\font\\csname ',
(cstemp==' ') and '\\space' or cstemp, '\\endcsname')
end
luatexbase.create_callback("luatexja.define_jfont", "data", function (ft, fn) return ft end)
-- EXT
local identifiers = fonts.hashes.identifiers
function jfontdefY()
local j = load_jfont_metric(jfm_dir)
local fn = font.id(cstemp)
local f = font_getfont(fn)
if not j then
ltjb.package_error('luatexja',
"bad JFM `" .. jfm_file_name .. "'",
'The JFM file you specified is not valid JFM file.\n'..
'So defining Japanese font is cancelled.')
tex.sprint(cat_lp, global_flag, '\\expandafter\\let\\csname ',
(cstemp==' ') and '\\space' or cstemp,
'\\endcsname=\\relax')
return
end
if not f then return end
update_jfm_cache(j, f.size)
local ad = identifiers[fn].parameters
local sz = metrics[j].size_cache[f.size]
local fmtable = { jfm = j, size = f.size, var = jfm_var,
with_kanjiskip = jfm_ksp,
zw = sz.zw, zh = sz.zh,
ascent = ad.ascender,
descent = ad.descender,
chars = sz.chars, char_type = sz.char_type,
kanjiskip = sz.kanjiskip, xkanjiskip = sz.xkanjiskip,
chars_cbcache = {},
vert_activated = is_vert_enabled,
}
fmtable = luatexbase.call_callback("luatexja.define_jfont", fmtable, fn)
font_metric_table[fn]=fmtable
tex.sprint(cat_lp, global_flag, '\\protected\\expandafter\\def\\csname ',
(cstemp==' ') and '\\space' or cstemp, '\\endcsname{\\ltj@cur'..
(jfm_dir == 'yoko' and 'j' or 't') .. 'fnt', fn, '\\relax}')
end
end
do
local get_dir_count = ltjd.get_dir_count
local dir_tate = luatexja.dir_table.dir_tate
local tex_get_attr = tex.getattribute
-- PUBLIC function
function get_zw()
local a = font_metric_table[
tex_get_attr((get_dir_count()==dir_tate) and attr_curtfnt or attr_curjfnt)]
return a and a.zw or 0
end
function get_zh()
local a = font_metric_table[
tex_get_attr((get_dir_count()==dir_tate) and attr_curtfnt or attr_curjfnt)]
return a and a.zw or 0
end
end
do
-- extract jfm_file_name and jfm_var
-- normalize position of 'jfm=' and 'jfmvar=' keys
local function extract_metric(name)
local is_braced = name:match('^{(.*)}$')
name= is_braced or name
jfm_file_name = ''; jfm_var = ''; jfm_ksp = true
local tmp, index = name:sub(1, 5), 1
if tmp == 'file:' or tmp == 'name:' or tmp == 'psft:' then
index = 6
end
local p = name:find(":", index); index = p and (p+1) or index
while index do
local l = name:len()+1
local q = name:find(";", index+1) or l
if name:sub(index, index+3)=='jfm=' and q>index+4 then
jfm_file_name = name:sub(index+4, q-1)
if l~=q then
name = name:sub(1,index-1) .. name:sub(q+1)
else
name = name:sub(1,index-1)
index = nil
end
elseif name:sub(index, index+6)=='jfmvar=' and q>index+6 then
jfm_var = name:sub(index+7, q-1)
if l~=q then
name = name:sub(1,index-1) .. name:sub(q+1)
else
name = name:sub(1,index-1)
index = nil
end
else
index = (l~=q) and (q+1) or nil
end
end
if jfm_file_name~='' then
local l = name:sub(-1)
name = name
.. ((l==':' or l==';') and '' or ';')
.. 'jfm=' .. jfm_file_name
if jfm_var~='' then
name = name .. 'jfmvar=' .. jfm_var
end
end
for x in string.gmatch (name, "[:;]([+%%-]?)ltjks") do
jfm_ksp = not (x=='-')
end
if jfm_dir == 'tate' then
is_vert_enabled = (not name:match('[:;]%-vert')) and (not name:match('[:;]%-vrt2'))
if not name:match('vert') and not name:match('vrt2') then
name = name .. ';+vert;+vrt2'
end
else
is_vert_enabled = nil
end
return is_braced and ('{' .. name .. '}') or name
end
-- define_font callback
local otfl_fdr
local ltjr_font_callback = ltjr.font_callback
function luatexja.font_callback(name, size, id)
local new_name = is_def_jfont and extract_metric(name) or name
is_def_jfont = false
local res = ltjr_font_callback(new_name, size, id, otfl_fdr)
luatexbase.call_callback('luatexja.define_font', res, new_name, size, id)
-- this callback processes variation selector, so we execute it always
return res
end
luatexbase.create_callback('luatexja.define_font', 'simple', function (n) return n end)
otfl_fdr= luatexbase.remove_from_callback('define_font', 'luaotfload.define_font')
luatexbase.add_to_callback('define_font',luatexja.font_callback,"luatexja.font_callback", 1)
end
------------------------------------------------------------------------
-- LATEX INTERFACE
------------------------------------------------------------------------
do
-- these function are called from ltj-latex.sty
local fenc_list, kyenc_list, ktenc_list = {}, {}, {}
function add_fenc_list(enc) fenc_list[enc] = 'true ' end
function add_kyenc_list(enc) kyenc_list[enc] = 'true ' end
function add_ktenc_list(enc) ktenc_list[enc] = 'true ' end
function is_kyenc(enc)
tex.sprint(cat_lp, '\\let\\ifin@\\if' .. (kyenc_list[enc] or 'false '))
end
function is_ktenc(enc)
tex.sprint(cat_lp, '\\let\\ifin@\\if' .. (ktenc_list[enc] or 'false '))
end
function is_kenc(enc)
tex.sprint(cat_lp, '\\let\\ifin@\\if'
.. (kyenc_list[enc] or ktenc_list[enc] or 'false '))
end
local kfam_list, Nkfam_list = {}, {}
function add_kfam(fam)
kfam_list[fam]=true
end
function search_kfam(fam, use_fd)
if kfam_list[fam] then
tex.sprint(cat_lp, '\\let\\ifin@\\iftrue '); return
elseif Nkfam_list[fam] then
tex.sprint(cat_lp, '\\let\\ifin@\\iffalse '); return
elseif use_fd then
for i,_ in pairs(kyenc_list) do
if kpse.find_file(string.lower(i)..fam..'.fd') then
tex.sprint(cat_lp, '\\let\\ifin@\\iftrue '); return
end
end
for i,_ in pairs(ktenc_list) do
if kpse.find_file(string.lower(i)..fam..'.fd') then
tex.sprint(cat_lp, '\\let\\ifin@\\iftrue '); return
end
end
Nkfam_list[fam]=true; tex.sprint(cat_lp, '\\let\\ifin@\\iffalse '); return
else
tex.sprint(cat_lp, '\\let\\ifin@\\iffalse '); return
end
end
local ffam_list, Nffam_list = {}, {}
function is_ffam(fam)
tex.sprint(cat_lp, '\\let\\ifin@\\if' .. (ffam_list[fam] or 'false '))
end
function add_ffam(fam)
ffam_list[fam]='true '
end
function search_ffam_declared()
local s = ''
for i,_ in pairs(fenc_list) do
s = s .. '\\cdp@elt{' .. i .. '}'
end
tex.sprint(cat_lp, s)
end
function search_ffam_fd(fam)
if Nffam_list[fam] then
tex.sprint(cat_lp, '\\let\\ifin@\\iffalse '); return
else
for i,_ in pairs(fenc_list) do
if kpse.find_file(string.lower(i)..fam..'.fd') then
tex.sprint(cat_lp, '\\let\\ifin@\\iftrue '); return
end
end
Nffam_list[fam]=true; tex.sprint(cat_lp, '\\let\\ifin@\\iffalse '); return
end
end
end
------------------------------------------------------------------------
-- ALTERNATE FONTS
------------------------------------------------------------------------
alt_font_table = {}
local alt_font_table = alt_font_table
local attr_curaltfnt = {}
local ucs_out = 0x110000
------ for TeX interface
-- EXT
function set_alt_font(b,e,ind,bfnt)
-- ind: 新フォント, bfnt: 基底フォント
if b>e then b, e = e, b end
if b*e<=0 then
ltjb.package_error('luatexja',
'bad character range ([' .. b .. ',' .. e .. ']). ' ..
'I take the intersection with [0x80, 0x10ffff].')
b, e = math.max(0x80,b),math.min(ucs_out-1,e)
elseif e<0 then -- b<e<0
-- do nothing
elseif b<0x80 or e>=ucs_out then
ltjb.package_warning('luatexja',
'bad character range ([' .. b .. ',' .. e .. ']). ' ..
'I take the intersection with [0x80, 0x10ffff].')
b, e = math.max(0x80,b), math.min(ucs_out-1,e)
end
if not alt_font_table[bfnt] then alt_font_table[bfnt]={} end
local t = alt_font_table[bfnt]
local ac = font_getfont(ind).characters
if bfnt==ind then ind = nil end -- ind == bfnt の場合はテーブルから削除
if e>=0 then -- character range
for i=b, e do
if ac[i]then t[i]=ind end
end
else
b, e = -e, -b
local tx = font_metric_table[bfnt].chars
for i,v in pairs(tx) do
if b<=v and v<=e and ac[i] then t[i]=ind end
end
end
end
-- EXT
function clear_alt_font(bfnt)
if alt_font_table[bfnt] then
local t = alt_font_table[bfnt]
for i,_ in pairs(t) do t[i]=nil; end
end
end
------ used in ltjp.suppress_hyphenate_ja callback
function replace_altfont(pf, pc)
local a = alt_font_table[pf]
return a and a[pc] or pf
end
------ for LaTeX interface
local alt_font_table_latex = {}
-- EXT
function clear_alt_font_latex(bbase)
local t = alt_font_table_latex[bbase]
if t then
for j,v in pairs(t) do t[j] = nil end
end
end
-- EXT
function set_alt_font_latex(b,e,ind,bbase)
-- ind: Alt font の enc/fam/ser/shape, bbase: 基底フォントの enc/fam/ser/shape
if b>e then b, e = e, b end
if b*e<=0 then
ltjb.package_error('luatexja',
'bad character range ([' .. b .. ',' .. e .. ']). ' ..
'I take the intersection with [0x80, 0x10ffff].')
b, e = math.max(0x80,b),math.min(ucs_out-1,e)
elseif e<0 then -- b<e<0
-- do nothing
elseif b<0x80 or e>=ucs_out then
ltjb.package_warning('luatexja',
'bad character range ([' .. b .. ',' .. e .. ']). ' ..
'I take the intersection with [0x80, 0x10ffff].')
b, e = math.max(0x80,b), math.min(ucs_out-1,e)
end
if not alt_font_table_latex[bbase] then alt_font_table_latex[bbase]={} end
local t = alt_font_table_latex[bbase]
if not t[ind] then t[ind] = {} end
for i=b, e do
for j,v in pairs(t) do
if v[i] then -- remove old entry
if j~=ind then v[i]=nil end; break
end
end
t[ind][i]=true
end
-- remove the empty tables
for j,v in pairs(t) do
local flag_clear = true
for k,_ in pairs(v) do flag_clear = false; break end
if flag_clear then t[j]=nil end
end
if ind==bbase then t[bbase] = nil end
end
-- ここから先は 新 \selectfont の内部でしか実行されない
do
local alt_font_base, alt_font_base_num
local aftl_base
-- EXT
function does_alt_set(bbase)
aftl_base = alt_font_table_latex[bbase]
tex.sprint(cat_lp, '\\if' .. (aftl_base and 'true' or 'false'))
end
-- EXT
function print_aftl_address()
tex.sprint(cat_lp, ';ltjaltfont' .. tostring(aftl_base):sub(8))
end
-- EXT
function output_alt_font_cmd(dir, bbase)
alt_font_base = bbase
if dir == 't' then
alt_font_base_num = tex.getattribute(attr_curtfnt)
else
alt_font_base_num = tex.getattribute(attr_curjfnt)
end
local t = alt_font_table[alt_font_base_num]
if t then
for i,_ in pairs(t) do t[i]=nil end
end
t = alt_font_table_latex[bbase]
if t then
for i,_ in pairs(t) do
tex.sprint(cat_lp, '\\ltj@pickup@altfont@aux' .. dir .. '{' .. i .. '}')
end
end
end
-- EXT
function pickup_alt_font_a(size_str)
local t = alt_font_table_latex[alt_font_base]
if t then
for i,v in pairs(t) do
tex.sprint(cat_lp, '\\expandafter\\ltj@pickup@altfont@copy'
.. '\\csname ' .. i .. '/' .. size_str .. '\\endcsname{' .. i .. '}')
end
end
end
local function pickup_alt_font_class(class, afnt_num, afnt_chars)
local t = alt_font_table[alt_font_base_num]
local tx = font_metric_table[alt_font_base_num].chars
for i,v in pairs(tx) do
if v==class and afnt_chars[i] then t[i]=afnt_num end
end
end
-- EXT
function pickup_alt_font_b(afnt_num, afnt_base)
local t = alt_font_table[alt_font_base_num]
local ac = font_getfont(afnt_num).characters
if not t then t = {}; alt_font_table[alt_font_base_num] = t end
for i,v in pairs(alt_font_table_latex[alt_font_base]) do
if i == afnt_base then
for j,_ in pairs(v) do
if j>=0 then
if ac[j] then t[j]=afnt_num end
else -- -n (n>=1) means that the character class n,
-- which is defined in the JFM
pickup_alt_font_class(-j, afnt_num, ac)
end
end
return
end
end
end
end
------------------------------------------------------------------------
-- 終了時に各種ノードを破棄
------------------------------------------------------------------------
do
function cleanup_size_cache()
--local gs, ke = 0, 0
for _,n in pairs(metrics) do
for i,t in pairs(n.size_cache) do
for _,v in pairs(t.char_type) do
for k,w in pairs(v) do
if type(k)=='number' then
--if w[1] then gs = gs + 1 else ke = ke + 1 end
if w[1] then node_free(w[1]) end
end
end
end
n.size_cache[i]=nil
end
end
end
end
------------------------------------------------------------------------
-- VERT VARIANT TABLE
------------------------------------------------------------------------
local vert_form_table = {
[0x2013]=0xFE32, [0x2014]=0xFE31, [0x2025]=0xFE30,
[0xFF08]=0xFE35, [0xFF09]=0xFE36, [0xFF5B]=0xFE37, [0xFF5D]=0xFE38,
[0x3014]=0xFE39, [0x3015]=0xFE3A, [0x3010]=0xFE3B, [0x3011]=0xFE3C,
[0x300A]=0xFE3D, [0x300B]=0xFE3E, [0x3008]=0xFE3F, [0x3009]=0xFE40,
[0x300C]=0xFE41, [0x300D]=0xFE42, [0x300E]=0xFE43, [0x300F]=0xFE44,
[0xFF3B]=0xFE47, [0xFF3D]=0xFE48, [0xFF3F]=0xFE33,
}
------------------------------------------------------------------------
-- 追加のフォント情報
------------------------------------------------------------------------
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, 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, vk
end
local sort = table.sort
local function add_fl_table(dest, glyphs, unitable, asc_des, units, id)
local glyphmin, glyphmax = glyphs.glyphmin, glyphs.glyphmax
if glyphmax < 0 then return dest end
local tg = glyphs.glyphs
for i = glyphmin, glyphmax do
local gv = tg[i]
if gv then
if gv.altuni then
for _,at in pairs(gv.altuni) do
local bu, vsel = at.unicode, at.variant
if vsel then
if vsel>=0xE0100 then vsel = vsel - 0xE0100 end
local uniq_flag = true
if dest and dest[bu] then
for i,_ in pairs(dest[bu]) do
if i==vsel then uniq_flag = false; break end
end
end
if uniq_flag then
dest = dest or {}; dest[bu] = dest[bu] or {}
dest[bu][vsel] = unitable[gv.name]
end
end
end
end
-- vertical form
local gi = unitable[gv.name]
if gi then
if unitable[gv.name .. '.vert'] then
dest = dest or {}; dest[gi] = dest[gi] or {};
dest[gi].vform = unitable[gv.name .. '.vert']
elseif id.characters[gi] and vert_form_table[gi] then
dest = dest or {}; dest[gi] = dest[gi] or {};
dest[gi].vform = vert_form_table[gi]
end
end
-- vertical metric
local vw, tsb, vk = glyph_vmetric(gv)
local gi = unitable[gv.name]
if gi and 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 gi and vk then
dest = dest or {};
local dest_vk = dest.vkerns or {}; dest.vkerns = dest_vk
for _,v in pairs(vk) do
if unitable[v.char] then
local vl = v.lookup
if type(vl)=='table' then
for _,vlt in pairs(vl) do
dest_vk[vlt] = dest_vk[vlt] or {}
dest_vk[vlt][gi] = dest_vk[vlt][gi] or {}
dest_vk[vlt][gi][unitable[v.char]] = v.off
end
else
dest_vk[vl] = dest_vk[vl] or {}
dest_vk[vl][gi] = dest_vk[vl][gi] or {}
dest_vk[vl][gi][unitable[v.char]] = v.off
end
end
end
end
end
end
return dest
end
prepare_fl_data = function (dest, id)
local fl = fontloader.open(id.filename)
local ind_to_uni, unicodes = {}, {}
for i,v in pairs(id.characters) do
ind_to_uni[v.index] = i
end
if fl.glyphs then
local tg, glyphmin, glyphmax = fl.glyphs, fl.glyphmin, fl.glyphmax
if 0 <= glyphmax then
for i = glyphmin, glyphmax do
if tg[i] and tg[i].name then unicodes[tg[i].name] = ind_to_uni[i] end
end
end
dest = add_fl_table(dest, fl, unicodes,
fl.ascent + fl.descent, fl.units_per_em, id)
end
if fl.subfonts then
for _,v in pairs(fl.subfonts) do
local tg, glyphmin, glyphmax = v.glyphs, v.glyphmin, v.glyphmax
if 0 <= glyphmax then
for i = glyphmin, glyphmax do
if tg[i] and tg[i].name then unicodes[tg[i].name] = ind_to_uni[i] end
end
end
end
for _,v in pairs(fl.subfonts) do
dest = add_fl_table(dest, v, unicodes,
fl.ascent + fl.descent, fl.units_per_em, id)
end
end
if dest then dest.unicodes = unicodes end
fontloader.close(fl); collectgarbage("collect")
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 and lookuphash 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
--
do
local cache_ver = 11
local checksum = file.checksum
local function prepare_extra_data_base(id)
if (not id) or (not id.filename) then return end
local bname = file.nameonly(id.filename)
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_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 and res.filename 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
return tfmdata
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 nulltable = {} -- dummy
ltjr.vert_addfunc = function (n) font_extra_info[n] = nulltable end
local identifiers = fonts.hashes.identifiers
for i=1,font.nextid()-1 do
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, table_vorg, subtables, ft, already_vert)
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' then
if sv[4]~=0 then
table_vadv[char_num]
= (table_vadv[char_num] or 0) + sv[4]
end
if sv[2]~=0 and not already_vert then
table_vorg[char_num]
= (table_vorg[char_num] or 0) + sv[2]
end
end
end
end
end
end
luatexbase.add_to_callback(
"luatexja.define_jfont",
function (fmtable, fnum)
local vadv = {}; fmtable.v_advance = vadv
local vorg = {}; fmtable.v_origin = vorg
local ft = font_getfont(fnum)
local subtables = {}
if ft.specification then
for feat_name,v in pairs(ft.specification.features.normal) do
if v==true 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, vorg, subtables, ft,
ft.specification.features.normal.vrt2 or ft.specification.features.normal.vert)
for i,v in pairs(vadv) do
vadv[i]=vadv[i]/ft.units_per_em*fmtable.size
end
for i,v in pairs(vorg) do
vorg[i]=vorg[i]/ft.units_per_em*fmtable.size
end
end
return fmtable
end, 1, 'ltj.v_advance'
)
end
------------------------------------------------------------------------
-- supply tounicode entries
------------------------------------------------------------------------
do
local ltjr_prepare_cid_font = ltjr.prepare_cid_font
luatexbase.add_to_callback(
'luaotfload.patch_font',
function (tfmdata)
if tfmdata.cidinfo then
local rd = ltjr_prepare_cid_font(tfmdata.cidinfo.registry, tfmdata.cidinfo.ordering)
if rd then
local ru, rc = rd.resources.unicodes, rd.characters
for i,v in pairs(tfmdata.characters) do
local w = ru["Japan1." .. tostring(v.index)]
if w then
v.tounicode = v.tounicode or rc[w]. tounicode
end
end
end
end
return tfmdata
end,
'ltj.supply_tounicode', 1)
end
------------------------------------------------------------------------
-- MISC
------------------------------------------------------------------------
do
local getfont = node.direct.getfont
local getchar = node.direct.getchar
local get_dir_count = ltjd.get_dir_count
local is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char_direct
local ensure_tex_attr = ltjb.ensure_tex_attr
local node_write = node.direct.write
local font = font
local new_ic_kern
if status.luatex_version>=89 then
new_ic_kern = function(g) return node_new(id_kern,3) end
else
local ITALIC = luatexja.icflag_table.ITALIC
new_ic_kern = function()
local g = node_new(id_kern, 1)
set_attr(g, attr_icflag, ITALIC)
return g
end
end
-- EXT: italic correction
function append_italic()
local p = to_direct(tex.nest[tex.nest.ptr].tail)
local TEMP = node_new(id_kern)
if p and getid(p)==id_glyph then
if is_ucs_in_japanese_char(p) then
local j = font_metric_table[
has_attr(p, (get_dir_count()==dir_tate) and attr_curtfnt or attr_curjfnt)
]
local g = new_ic_kern()
setfield(g, 'kern', j.char_type[find_char_class(getchar(p), j)].italic)
node_write(g); ensure_tex_attr(attr_icflag, 0)
else
local f = getfont(p)
local h = font_getfont(f) or font.fonts[f]
if h then
local g = new_ic_kern()
if h.characters[getchar(p)] and h.characters[getchar(p)].italic then
setfield(g, 'kern', h.characters[getchar(p)].italic)
node_write(g); ensure_tex_attr(attr_icflag, 0)
end
end
end
end
node_free(TEMP)
end
end
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