class PDF::Reader::WidthCalculator::Composite

CIDFontType0 or CIDFontType2 use DW (integer) and W (array) to determine codepoint widths, note that CIDFontType2 will contain a true type font program which could be used to calculate width, however, a conforming writer is supposed to convert the widths for the codepoints used into the W array so that it can be used. see Section 9.7.4.1, PDF 32000-1:2008, pp 269-270

Public Class Methods

new(font) click to toggle source
# File lib/pdf/reader/width_calculator/composite.rb, line 13
def initialize(font)
  @font = font
  @widths = PDF::Reader::CidWidths.new(@font.cid_default_width, @font.cid_widths)
end

Public Instance Methods

glyph_width(code_point) click to toggle source
# File lib/pdf/reader/width_calculator/composite.rb, line 18
def glyph_width(code_point)
  return 0 if code_point.nil? || code_point < 0

  w = @widths[code_point]
  # 0 is a valid width
  return w.to_f unless w.nil?
end