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
|
require 'ttfunk/reader'
module TTFunk
class Table
class Cmap
class Subtable
include Reader
attr_reader :platform_id
attr_reader :encoding_id
attr_reader :format
ENCODING_MAPPINGS = {
:mac_roman => { :platform_id => 1, :encoding_id => 0 },
# use microsoft unicode, instead of generic unicode, for optimal windows support
:unicode => { :platform_id => 3, :encoding_id => 1 }
}
def self.encode(charmap, encoding)
case encoding
when :mac_roman
result = Format00.encode(charmap)
when :unicode
result = Format04.encode(charmap)
else
raise NotImplementedError, "encoding #{encoding.inspect} is not supported"
end
mapping = ENCODING_MAPPINGS[encoding]
# platform-id, encoding-id, offset
result[:subtable] = [mapping[:platform_id], mapping[:encoding_id],
12, result[:subtable]].pack("nnNA*")
return result
end
def initialize(file, table_start)
@file = file
@platform_id, @encoding_id, @offset = read(8, "nnN")
@offset += table_start
parse_from(@offset) do
@format = read(2, "n").first
case @format
when 0 then extend(TTFunk::Table::Cmap::Format00)
when 4 then extend(TTFunk::Table::Cmap::Format04)
end
parse_cmap!
end
end
def unicode?
platform_id == 3 && encoding_id == 1 && format == 4 ||
platform_id == 0 && format == 4
end
def supported?
false
end
def [](code)
raise NotImplementedError, "cmap format #{@format} is not supported"
end
private
def parse_cmap!
# do nothing...
end
end
end
end
end
require 'ttfunk/table/cmap/format00'
require 'ttfunk/table/cmap/format04'
|
