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Contents
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'
Version data entries
27 entries across 27 versions & 9 rubygems