# File lib/ttfunk/subset_collection.rb, line 5 def initialize(original) @original = original @subsets = [Subset.for(@original, :mac_roman)] end
# File lib/ttfunk/subset_collection.rb, line 10 def [](subset) @subsets[subset] end
characters
should be an array of UTF-16 characters. Returns an
array of subset chunks, where each chunk is another array of two elements.
The first element is the subset number, and the second element is the
string of characters to render with that font subset. The strings will be
encoded for their subset font, and so may not look (in the raw) like what
was passed in, but they will render correctly with the indicated subset
font.
# File lib/ttfunk/subset_collection.rb, line 40 def encode(characters) return [] if characters.empty? # TODO: probably would be more optimal to nix the #use method, # and merge it into this one, so it can be done in a single # pass instead of two passes. use(characters) parts = [] current_subset = 0 current_char = 0 char = characters[current_char] loop do while @subsets[current_subset].includes?(char) char = @subsets[current_subset].from_unicode(char) if parts.empty? || parts.last[0] != current_subset parts << [current_subset, char.chr] else parts.last[1] << char end current_char += 1 return parts if current_char >= characters.length char = characters[current_char] end current_subset = (current_subset + 1) % @subsets.length end end
characters
should be an array of UTF-16 characters
# File lib/ttfunk/subset_collection.rb, line 15 def use(characters) characters.each do |char| covered = false @subsets.each_with_index do |subset, i| if subset.covers?(char) subset.use(char) covered = true break end end if !covered @subsets << Subset.for(@original, :unicode_8bit) @subsets.last.use(char) end end end