class TTFunk::Table::Glyf
Public Class Methods
encode(glyphs, new_to_old, old_to_new)
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Accepts a hash mapping (old) glyph-ids to glyph objects, and a hash mapping old glyph-ids to new glyph-ids.
Returns a hash containing:
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:table - a string representing the encoded 'glyf' table containing the given glyphs.
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:offsets - an array of offsets for each glyph
# File lib/ttfunk/table/glyf.rb, line 16 def self.encode(glyphs, new_to_old, old_to_new) result = { table: +'', offsets: [] } new_to_old.keys.sort.each do |new_id| glyph = glyphs[new_to_old[new_id]] result[:offsets] << result[:table].length result[:table] << glyph.recode(old_to_new) if glyph end # include an offset at the end of the table, for use in computing the # size of the last glyph result[:offsets] << result[:table].length result end
Public Instance Methods
for(glyph_id)
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# File lib/ttfunk/table/glyf.rb, line 31 def for(glyph_id) return @cache[glyph_id] if @cache.key?(glyph_id) index = file.glyph_locations.index_of(glyph_id) size = file.glyph_locations.size_of(glyph_id) if size.zero? # blank glyph, e.g. space character @cache[glyph_id] = nil return end parse_from(offset + index) do raw = io.read(size) number_of_contours = to_signed(raw.unpack1('n')) @cache[glyph_id] = if number_of_contours == -1 Compound.new(glyph_id, raw) else Simple.new(glyph_id, raw) end end end
Private Instance Methods
parse!()
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# File lib/ttfunk/table/glyf.rb, line 57 def parse! # because the glyf table is rather complex to parse, we defer # the parse until we need a specific glyf, and then cache it. @cache = {} end