Class: Pdfrb::Font::TrueType::Hhea

Inherits:
Object
  • Object
show all
Defined in:
lib/pdfrb/font/true_type/hhea.rb

Overview

hhea (Horizontal Header) table parser. Exposes ascender, descender, line_gap, number_of_hmetrics (used by hmtx).

Spec: OpenType "hhea" v1.0 — 36 bytes.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ Hhea

Returns a new instance of Hhea.



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# File 'lib/pdfrb/font/true_type/hhea.rb', line 14

def initialize(data)
  @data = data
  return unless data && data.bytesize >= 36

  @ascender = s16(4)
  @descender = s16(6)
  @line_gap = s16(8)
  @advance_width_max = u16(10)
  @number_of_hmetrics = u16(34)
end

Instance Attribute Details

#advance_width_max ⇒ Object (readonly)

Returns the value of attribute advance_width_max.



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# File 'lib/pdfrb/font/true_type/hhea.rb', line 11

def advance_width_max
  @advance_width_max
end

#ascender ⇒ Object (readonly)

Returns the value of attribute ascender.



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# File 'lib/pdfrb/font/true_type/hhea.rb', line 11

def ascender
  @ascender
end

#descender ⇒ Object (readonly)

Returns the value of attribute descender.



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# File 'lib/pdfrb/font/true_type/hhea.rb', line 11

def descender
  @descender
end

#line_gap ⇒ Object (readonly)

Returns the value of attribute line_gap.



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# File 'lib/pdfrb/font/true_type/hhea.rb', line 11

def line_gap
  @line_gap
end

#number_of_hmetrics ⇒ Object (readonly)

Returns the value of attribute number_of_hmetrics.



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# File 'lib/pdfrb/font/true_type/hhea.rb', line 11

def number_of_hmetrics
  @number_of_hmetrics
end