46 lines
1.3 KiB
Ruby
46 lines
1.3 KiB
Ruby
# frozen_string_literal: true
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module TTFunk
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class Table
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class Cff < TTFunk::Table
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# CFF Charstrings Index.
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class CharstringsIndex < TTFunk::Table::Cff::Index
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# Top dict.
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# @return [TTFunk::Table::Cff::TopDict]
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attr_reader :top_dict
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# @overload initialize(top_dict, file, offset, length = nil)
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# @param top_dict [TTFunk::Table:Cff::TopDict]
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# @param file [TTFunk::File]
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# @param offset [Integer]
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# @param length [Integer]
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def initialize(top_dict, *remaining_args)
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super(*remaining_args)
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@top_dict = top_dict
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end
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private
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def decode_item(index, _offset, _length)
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TTFunk::Table::Cff::Charstring.new(index, top_dict, font_dict_for(index), super)
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end
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def encode_items(charmap)
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charmap
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.reject { |code, mapping| mapping[:new].zero? && !code.zero? }
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.sort_by { |_code, mapping| mapping[:new] }
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.map { |(_code, mapping)| items[mapping[:old]] }
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end
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def font_dict_for(index)
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# only CID-keyed fonts contain an FD selector and font dicts
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if top_dict.is_cid_font?
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fd_index = top_dict.font_dict_selector[index]
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top_dict.font_index[fd_index]
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end
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end
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end
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end
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end
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end
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