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
|
if not modules then modules = { } end modules ['font-cid'] = {
version = 1.001,
comment = "companion to font-otf.lua (cidmaps)",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local format, match, lower = string.format, string.match, string.lower
local tonumber = tonumber
local lpegmatch = lpeg.match
local trace_loading = false trackers.register("otf.loading", function(v) trace_loading = v end)
local report_otf = logs.new("load otf")
fonts = fonts or { }
fonts.cid = fonts.cid or { }
fonts.cid.map = fonts.cid.map or { }
fonts.cid.max = fonts.cid.max or 10
-- original string parser: 0.109, lpeg parser: 0.036 seconds for Adobe-CNS1-4.cidmap
--
-- 18964 18964 (leader)
-- 0 /.notdef
-- 1..95 0020
-- 99 3000
local number = lpeg.C(lpeg.R("09","af","AF")^1)
local space = lpeg.S(" \n\r\t")
local spaces = space^0
local period = lpeg.P(".")
local periods = period * period
local name = lpeg.P("/") * lpeg.C((1-space)^1)
local unicodes, names = { }, { }
local function do_one(a,b)
unicodes[tonumber(a)] = tonumber(b,16)
end
local function do_range(a,b,c)
c = tonumber(c,16)
for i=tonumber(a),tonumber(b) do
unicodes[i] = c
c = c + 1
end
end
local function do_name(a,b)
names[tonumber(a)] = b
end
local grammar = lpeg.P { "start",
start = number * spaces * number * lpeg.V("series"),
series = (spaces * (lpeg.V("one") + lpeg.V("range") + lpeg.V("named")) )^1,
one = (number * spaces * number) / do_one,
range = (number * periods * number * spaces * number) / do_range,
named = (number * spaces * name) / do_name
}
function fonts.cid.load(filename)
local data = io.loaddata(filename)
if data then
unicodes, names = { }, { }
lpegmatch(grammar,data)
local supplement, registry, ordering = match(filename,"^(.-)%-(.-)%-()%.(.-)$")
return {
supplement = supplement,
registry = registry,
ordering = ordering,
filename = filename,
unicodes = unicodes,
names = names
}
else
return nil
end
end
local template = "%s-%s-%s.cidmap"
local function locate(registry,ordering,supplement)
local filename = format(template,registry,ordering,supplement)
local hashname = lower(filename)
local cidmap = fonts.cid.map[hashname]
if not cidmap then
if trace_loading then
report_otf("checking cidmap, registry: %s, ordering: %s, supplement: %s, filename: %s",registry,ordering,supplement,filename)
end
local fullname = resolvers.find_file(filename,'cid') or ""
if fullname ~= "" then
cidmap = fonts.cid.load(fullname)
if cidmap then
if trace_loading then
report_otf("using cidmap file %s",filename)
end
fonts.cid.map[hashname] = cidmap
cidmap.usedname = file.basename(filename)
return cidmap
end
end
end
return cidmap
end
function fonts.cid.getmap(registry,ordering,supplement)
-- cf Arthur R. we can safely scan upwards since cids are downward compatible
local supplement = tonumber(supplement)
if trace_loading then
report_otf("needed cidmap, registry: %s, ordering: %s, supplement: %s",registry,ordering,supplement)
end
local cidmap = locate(registry,ordering,supplement)
if not cidmap then
local cidnum = nil
-- next highest (alternatively we could start high)
if supplement < fonts.cid.max then
for supplement=supplement+1,fonts.cid.max do
local c = locate(registry,ordering,supplement)
if c then
cidmap, cidnum = c, supplement
break
end
end
end
-- next lowest (least worse fit)
if not cidmap and supplement > 0 then
for supplement=supplement-1,0,-1 do
local c = locate(registry,ordering,supplement)
if c then
cidmap, cidnum = c, supplement
break
end
end
end
-- prevent further lookups
if cidmap and cidnum > 0 then
for s=0,cidnum-1 do
filename = format(template,registry,ordering,s)
if not fonts.cid.map[filename] then
fonts.cid.map[filename] = cidmap -- copy of ref
end
end
end
end
return cidmap
end
|
