summaryrefslogtreecommitdiff
path: root/otfl-font-dum.lua
blob: 54b631d552095f00c4aaabb077bcfa7cd91fe995 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
if not modules then modules = { } end modules ['font-dum'] = {
    version   = 1.001,
    comment   = "companion to luatex-*.tex",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

fonts = fonts or { }

-- general

fonts.otf.pack              = false -- only makes sense in context
fonts.tfm.resolvevirtualtoo = false -- context specific (due to resolver)
fonts.tfm.fontnamemode      = "specification" -- somehow latex needs this (changed name!)

-- readers

fonts.tfm.readers          = fonts.tfm.readers or { }
fonts.tfm.readers.sequence = { 'otf', 'ttf', 'tfm', 'lua' }
fonts.tfm.readers.afm      = nil

-- define

fonts.definers            = fonts.definers or { }
fonts.definers.specifiers = fonts.definers.specifiers or { }

fonts.definers.specifiers.colonizedpreference = "name" -- is "file" in context

function fonts.definers.getspecification(str)
    return "", str, "", ":", str
end

fonts.definers.registersplit("",fonts.definers.specifiers.variants[":"]) -- we add another one for catching lone [names]

-- logger

fonts.logger = fonts.logger or { }

function fonts.logger.save()
end

-- names
--
-- Watch out, the version number is the same as the one used in
-- the mtx-fonts.lua function scripts.fonts.names as we use a
-- simplified font database in the plain solution and by using
-- a different number we're less dependent on context.

fonts.names = fonts.names or { }

fonts.names.version    = 1.001 -- not the same as in context
fonts.names.basename   = "luatex-fonts-names.lua"
fonts.names.new_to_old = { }
fonts.names.old_to_new = { }

local data, loaded = nil, false

local fileformats = { "lua", "tex", "other text files" }

function fonts.names.resolve(name,sub)
    if not loaded then
        local basename = fonts.names.basename
        if basename and basename ~= "" then
            for i=1,#fileformats do
                local format = fileformats[i]
                local foundname = resolvers.findfile(basename,format) or ""
                if foundname ~= "" then
                    data = dofile(foundname)
                    break
                end
            end
        end
        loaded = true
    end
    if type(data) == "table" and data.version == fonts.names.version then
        local condensed = string.gsub(string.lower(name),"[^%a%d]","")
        local found = data.mappings and data.mappings[condensed]
        if found then
            local fontname, filename, subfont = found[1], found[2], found[3]
            if subfont then
                return filename, fontname
            else
                return filename, false
            end
        else
            return name, false -- fallback to filename
        end
    end
end

fonts.names.resolvespec = fonts.names.resolve -- only supported in mkiv

function fonts.names.getfilename(askedname,suffix)  -- only supported in mkiv
    return ""
end

-- For the moment we put this (adapted) pseudo feature here.

table.insert(fonts.triggers,"itlc")

local function itlc(tfmdata,value)
    if value then
        -- the magic 40 and it formula come from Dohyun Kim
        local metadata = tfmdata.shared.otfdata.metadata
        if metadata then
            local italicangle = metadata.italicangle
            if italicangle and italicangle ~= 0 then
                local uwidth = (metadata.uwidth or 40)/2
                for unicode, d in next, tfmdata.descriptions do
                    local it = d.boundingbox[3] - d.width + uwidth
                    if it ~= 0 then
                        d.italic = it
                    end
                end
                tfmdata.has_italic = true
            end
        end
    end
end

fonts.initializers.base.otf.itlc = itlc
fonts.initializers.node.otf.itlc = itlc

-- slant and extend

function fonts.initializers.common.slant(tfmdata,value)
    value = tonumber(value)
    if not value then
        value =  0
    elseif value >  1 then
        value =  1
    elseif value < -1 then
        value = -1
    end
    tfmdata.slant_factor = value
end

function fonts.initializers.common.extend(tfmdata,value)
    value = tonumber(value)
    if not value then
        value =  0
    elseif value >  10 then
        value =  10
    elseif value < -10 then
        value = -10
    end
    tfmdata.extend_factor = value
end

table.insert(fonts.triggers,"slant")
table.insert(fonts.triggers,"extend")

fonts.initializers.base.otf.slant  = fonts.initializers.common.slant
fonts.initializers.node.otf.slant  = fonts.initializers.common.slant
fonts.initializers.base.otf.extend = fonts.initializers.common.extend
fonts.initializers.node.otf.extend = fonts.initializers.common.extend

-- expansion and protrusion

fonts.protrusions        = fonts.protrusions        or { }
fonts.protrusions.setups = fonts.protrusions.setups or { }

local setups  = fonts.protrusions.setups

function fonts.initializers.common.protrusion(tfmdata,value)
    if value then
        local setup = setups[value]
        if setup then
            local factor, left, right = setup.factor or 1, setup.left or 1, setup.right or 1
            local emwidth = tfmdata.parameters.quad
            tfmdata.auto_protrude = true
            for i, chr in next, tfmdata.characters do
                local v, pl, pr = setup[i], nil, nil
                if v then
                    pl, pr = v[1], v[2]
                end
                if pl and pl ~= 0 then chr.left_protruding  = left *pl*factor end
                if pr and pr ~= 0 then chr.right_protruding = right*pr*factor end
            end
        end
    end
end

fonts.expansions         = fonts.expansions        or { }
fonts.expansions.setups  = fonts.expansions.setups or { }

local setups = fonts.expansions.setups

function fonts.initializers.common.expansion(tfmdata,value)
    if value then
        local setup = setups[value]
        if setup then
            local stretch, shrink, step, factor = setup.stretch or 0, setup.shrink or 0, setup.step or 0, setup.factor or 1
            tfmdata.stretch, tfmdata.shrink, tfmdata.step, tfmdata.auto_expand = stretch * 10, shrink * 10, step * 10, true
            for i, chr in next, tfmdata.characters do
                local v = setup[i]
                if v and v ~= 0 then
                    chr.expansion_factor = v*factor
                else -- can be option
                    chr.expansion_factor = factor
                end
            end
        end
    end
end

table.insert(fonts.manipulators,"protrusion")
table.insert(fonts.manipulators,"expansion")

fonts.initializers.base.otf.protrusion = fonts.initializers.common.protrusion
fonts.initializers.node.otf.protrusion = fonts.initializers.common.protrusion
fonts.initializers.base.otf.expansion  = fonts.initializers.common.expansion
fonts.initializers.node.otf.expansion  = fonts.initializers.common.expansion

-- left over

function fonts.registermessage()
end

-- example vectors

local byte = string.byte

fonts.expansions.setups['default'] = {

    stretch = 2, shrink = 2, step = .5, factor = 1,

    [byte('A')] = 0.5, [byte('B')] = 0.7, [byte('C')] = 0.7, [byte('D')] = 0.5, [byte('E')] = 0.7,
    [byte('F')] = 0.7, [byte('G')] = 0.5, [byte('H')] = 0.7, [byte('K')] = 0.7, [byte('M')] = 0.7,
    [byte('N')] = 0.7, [byte('O')] = 0.5, [byte('P')] = 0.7, [byte('Q')] = 0.5, [byte('R')] = 0.7,
    [byte('S')] = 0.7, [byte('U')] = 0.7, [byte('W')] = 0.7, [byte('Z')] = 0.7,
    [byte('a')] = 0.7, [byte('b')] = 0.7, [byte('c')] = 0.7, [byte('d')] = 0.7, [byte('e')] = 0.7,
    [byte('g')] = 0.7, [byte('h')] = 0.7, [byte('k')] = 0.7, [byte('m')] = 0.7, [byte('n')] = 0.7,
    [byte('o')] = 0.7, [byte('p')] = 0.7, [byte('q')] = 0.7, [byte('s')] = 0.7, [byte('u')] = 0.7,
    [byte('w')] = 0.7, [byte('z')] = 0.7,
    [byte('2')] = 0.7, [byte('3')] = 0.7, [byte('6')] = 0.7, [byte('8')] = 0.7, [byte('9')] = 0.7,
}

fonts.protrusions.setups['default'] = {

    factor = 1, left = 1, right = 1,

    [0x002C] = { 0, 1    }, -- comma
    [0x002E] = { 0, 1    }, -- period
    [0x003A] = { 0, 1    }, -- colon
    [0x003B] = { 0, 1    }, -- semicolon
    [0x002D] = { 0, 1    }, -- hyphen
    [0x2013] = { 0, 0.50 }, -- endash
    [0x2014] = { 0, 0.33 }, -- emdash
    [0x3001] = { 0, 1    }, -- ideographic comma      、
    [0x3002] = { 0, 1    }, -- ideographic full stop  。
    [0x060C] = { 0, 1    }, -- arabic comma           ،
    [0x061B] = { 0, 1    }, -- arabic semicolon       ؛
    [0x06D4] = { 0, 1    }, -- arabic full stop       ۔

}

-- normalizer

fonts.otf.meanings = fonts.otf.meanings or { }

fonts.otf.meanings.normalize = fonts.otf.meanings.normalize or function(t)
    if t.rand then
        t.rand = "random"
    end
end

-- needed (different in context)

function fonts.otf.scriptandlanguage(tfmdata)
    return tfmdata.script, tfmdata.language
end

-- bonus

function fonts.otf.nametoslot(name)
    local tfmdata = fonts.identifiers[font.current()]
    if tfmdata and tfmdata.shared then
        local otfdata = tfmdata.shared.otfdata
        local unicode = otfdata.luatex.unicodes[name]
        return unicode and (type(unicode) == "number" and unicode or unicode[1])
    end
end

function fonts.otf.char(n)
    if type(n) == "string" then
        n = fonts.otf.nametoslot(n)
    end
    if type(n) == "number" then
        tex.sprint("\\char" .. n)
    end
end

-- another one:

fonts.strippables = table.tohash {
    0x000AD, 0x017B4, 0x017B5, 0x0200B, 0x0200C, 0x0200D, 0x0200E, 0x0200F, 0x0202A, 0x0202B,
    0x0202C, 0x0202D, 0x0202E, 0x02060, 0x02061, 0x02062, 0x02063, 0x0206A, 0x0206B, 0x0206C,
    0x0206D, 0x0206E, 0x0206F, 0x0FEFF, 0x1D173, 0x1D174, 0x1D175, 0x1D176, 0x1D177, 0x1D178,
    0x1D179, 0x1D17A, 0xE0001, 0xE0020, 0xE0021, 0xE0022, 0xE0023, 0xE0024, 0xE0025, 0xE0026,
    0xE0027, 0xE0028, 0xE0029, 0xE002A, 0xE002B, 0xE002C, 0xE002D, 0xE002E, 0xE002F, 0xE0030,
    0xE0031, 0xE0032, 0xE0033, 0xE0034, 0xE0035, 0xE0036, 0xE0037, 0xE0038, 0xE0039, 0xE003A,
    0xE003B, 0xE003C, 0xE003D, 0xE003E, 0xE003F, 0xE0040, 0xE0041, 0xE0042, 0xE0043, 0xE0044,
    0xE0045, 0xE0046, 0xE0047, 0xE0048, 0xE0049, 0xE004A, 0xE004B, 0xE004C, 0xE004D, 0xE004E,
    0xE004F, 0xE0050, 0xE0051, 0xE0052, 0xE0053, 0xE0054, 0xE0055, 0xE0056, 0xE0057, 0xE0058,
    0xE0059, 0xE005A, 0xE005B, 0xE005C, 0xE005D, 0xE005E, 0xE005F, 0xE0060, 0xE0061, 0xE0062,
    0xE0063, 0xE0064, 0xE0065, 0xE0066, 0xE0067, 0xE0068, 0xE0069, 0xE006A, 0xE006B, 0xE006C,
    0xE006D, 0xE006E, 0xE006F, 0xE0070, 0xE0071, 0xE0072, 0xE0073, 0xE0074, 0xE0075, 0xE0076,
    0xE0077, 0xE0078, 0xE0079, 0xE007A, 0xE007B, 0xE007C, 0xE007D, 0xE007E, 0xE007F,
}

-- \font\test=file:somefont:reencode=mymessup
--
--  fonts.enc.reencodings.mymessup = {
--      [109] = 110, -- m
--      [110] = 109, -- n
--  }

fonts.enc             = fonts.enc or {}
local reencodings     = { }
fonts.enc.reencodings = reencodings

local function specialreencode(tfmdata,value)
    -- we forget about kerns as we assume symbols and we
    -- could issue a message if ther are kerns but it's
    -- a hack anyway so we odn't care too much here
    local encoding = value and reencodings[value]
    if encoding then
        local temp = { }
        local char = tfmdata.characters
        for k, v in next, encoding do
            temp[k] = char[v]
        end
        for k, v in next, temp do
            char[k] = temp[k]
        end
        -- if we use the font otherwise luatex gets confused so
        -- we return an additional hash component for fullname
        return string.format("reencoded:%s",value)
    end
end

local function reencode(tfmdata,value)
    tfmdata.postprocessors = tfmdata.postprocessors or { }
    table.insert(tfmdata.postprocessors,
        function(tfmdata)
            return specialreencode(tfmdata,value)
        end
    )
end

table.insert(fonts.manipulators,"reencode")
fonts.initializers.base.otf.reencode = reencode