class TTFunk::Table::Glyf
Glyph Data (‘glyf`) table.
Public Class Methods
Source
# File lib/ttfunk/table/glyf.rb, line 19 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
Encode table.
@param glyphs [Hash] a hash mapping (old) glyph-ids to glyph objects @param new_to_old [Hash{Integer => Integer}] a hash mapping new glyph
IDs to glyph IDs in the original font.
@param old_to_new [Hash{Integer => Integer}] a hash mapping old glyph
IDs to new glyph IDs.
@return [Hash]
* `:table` (<tt>String</tt>) - encoded table. * `:offsets` (<tt>Array\<Integer></tt>) - glyph offsets in the table.
Public Instance Methods
Source
# File lib/ttfunk/table/glyf.rb, line 39 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
Get glyph by ID.
@param glyph_id [Integer] @return [TTFunk::Table::Glyf::Simple, TTFunk::Table::Glyf::Compound
,
nil]
Private Instance Methods
Source
# File lib/ttfunk/table/glyf.rb, line 65 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