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Contents
module TTFunk
class Table
class Cmap
module Format10
attr_reader :language
attr_reader :code_map
def self.encode(charmap)
next_id = 0
glyph_map = { 0 => 0 }
sorted_chars = charmap.keys.sort
low_char = sorted_chars.first
high_char = sorted_chars.last
entry_count = 1 + high_char - low_char
glyph_indexes = Array.new(entry_count, 0)
new_map = charmap.keys.sort.each_with_object({}) do |code, map|
glyph_map[charmap[code]] ||= next_id += 1
map[code] = { old: charmap[code], new: glyph_map[charmap[code]] }
glyph_indexes[code - low_char] = glyph_map[charmap[code]]
end
subtable = [
10, 0, 20 + entry_count * 4, 0, low_char, entry_count,
*glyph_indexes
].pack('nnN*')
{ charmap: new_map, subtable: subtable, max_glyph_id: next_id + 1 }
end
def [](code)
@code_map[code] || 0
end
def supported?
true
end
private
def parse_cmap!
fractional_version, @language, firstcode, entrycount =
read(18, 'nx4NNN')
if fractional_version != 0
raise NotImplementedError,
"cmap version 10.#{fractional_version} is not supported"
end
@code_map = {}
(firstcode...(firstcode + entrycount)).each do |code|
@code_map[code] = read(2, 'n').first & 0xFFFF
end
end
end
end
end
end
Version data entries
4 entries across 3 versions & 2 rubygems