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require 'set'
require 'ttfunk/subset/base'
require 'ttfunk/encoding/windows_1252'
module TTFunk
module Subset
class Windows1252 < Base
def initialize(original)
super
@subset = Array.new(256)
end
def to_unicode_map
Encoding::Windows1252::TO_UNICODE
end
def use(character)
@subset[Encoding::Windows1252::FROM_UNICODE[character]] = character
end
def covers?(character)
Encoding::Windows1252.covers?(character)
end
def includes?(character)
code = Encoding::Windows1252::FROM_UNICODE[character]
code && @subset[code]
end
def from_unicode(character)
Encoding::Windows1252::FROM_UNICODE[character]
end
protected
def new_cmap_table(options)
mapping = {}
@subset.each_with_index do |unicode, cp1252|
mapping[cp1252] = unicode_cmap[unicode] if cp1252
end
# yes, I really mean "mac roman". TTF has no cp1252 encoding, and the
# alternative would be to encode it using a format 4 unicode table, which
# is overkill. for our purposes, mac-roman suffices. (If we were building
# a _real_ font, instead of a PDF-embeddable subset, things would probably
# be different.)
TTFunk::Table::Cmap.encode(mapping, :mac_roman)
end
def original_glyph_ids
([0] + @subset.map { |unicode| unicode && unicode_cmap[unicode] }).compact.uniq.sort
end
end
end
end
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