Class: TTFunk::Table::Cff::Charstring

Inherits:
Object
  • Object
show all
Defined in:
lib/ttfunk/table/cff/charstring.rb

Overview

CFF Charstring.

Constant Summary collapse

CODE_MAP =

Type 2 charstring operators

{
  1 => :hstem,
  3 => :vstem,
  4 => :vmoveto,
  5 => :rlineto,
  6 => :hlineto,
  7 => :vlineto,
  8 => :rrcurveto,
  10 => :callsubr,
  12 => :flex_select,
  14 => :endchar,
  18 => :hstemhm,
  19 => :hintmask,
  20 => :cntrmask,
  21 => :rmoveto,
  22 => :hmoveto,
  23 => :vstemhm,
  24 => :rcurveline,
  25 => :rlinecurve,
  26 => :vvcurveto,
  27 => :hhcurveto,
  28 => :shortint,
  29 => :callgsubr,
  30 => :vhcurveto,
  31 => :hvcurveto,
}.freeze
FLEX_CODE_MAP =

Type 2 Flex operators.

{
  35 => :flex,
  34 => :hflex,
  36 => :hflex1,
  37 => :flex1,
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(glyph_id, top_dict, font_dict, raw) ⇒ Charstring

Returns a new instance of Charstring.

Parameters:

  • glyph_id (Integer)
  • top_dict (TTFunk::Table:Cff::TopDict)
  • font_dict (TTFunk::Table:Cff::FontDict)
  • raw (String)
Source Code
lib/ttfunk/table/cff/charstring.rb, line 56
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def initialize(glyph_id, top_dict, font_dict, raw)

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  @glyph_id = glyph_id

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  @top_dict = top_dict

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  @font_dict = font_dict

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  @raw = raw

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  default_width_x = (@font_dict || @top_dict).private_dict.default_width_x

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  @nominal_width_x = (@font_dict || @top_dict).private_dict.nominal_width_x

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  @subrs = (@font_dict || @top_dict).private_dict.subr_index

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  @gsubrs = @top_dict.cff.global_subr_index

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  @subrs_bias = @subrs.bias if @subrs

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  @gsubrs_bias = @gsubrs.bias if @gsubrs

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  @stack = []

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  @data = raw.bytes

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  @index = 0

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  @n_stems = 0

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  @have_width = false

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  @open = false

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  @width = default_width_x

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  @x = 0

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  @y = 0

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end







  



  

    
Instance Attribute Details

    
      
      
      

  

  
    #glyph_id  ⇒ Integer  (readonly)
  

  

  


  

    
Glyph ID.



  





  


Returns:


    
  
    
  • 
      
      
        (Integer)
      
      
      
    
    • 
  







  Source Code
  
lib/ttfunk/table/cff/charstring.rb, line 46

  
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def glyph_id

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  @glyph_id

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end







    
      
      
      

  

  
    #raw  ⇒ String  (readonly)
  

  

  


  

    
Encoded charstring.



  





  


Returns:


    
  
    
  • 
      
      
        (String)
      
      
      
    
    • 
  







  Source Code
  
lib/ttfunk/table/cff/charstring.rb, line 50

  
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def raw

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  @raw

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end







    
  



  

    
Instance Method Details


    
      

  

  
    #glyph  ⇒ TTFunk::Table::Glyf::PathBased 
  

  

  


  

    
Get a TrueType-compatible glyph representation of this charstring.



  





  


Returns:







  Source Code
  
lib/ttfunk/table/cff/charstring.rb, line 96

  
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def glyph

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  @glyph ||=

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    begin

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      horizontal_metrics = @top_dict.file.horizontal_metrics.for(glyph_id)

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      Glyf::PathBased.new(path, horizontal_metrics)

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    end

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end







    
      

  

  
    #path  ⇒ TTFunk::Table::Cff::Path 
  

  

  


  

    
Get path representation of this charstring.



  





  


Returns:







  Source Code
  
lib/ttfunk/table/cff/charstring.rb, line 85

  
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def path

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  @path || begin

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    @path = Path.new

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    parse!

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    @path

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  end

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end







    
      

  

  
    #render(x: 0, y: 0, font_size: 72)  ⇒ TTFunk::Table::Cff::Path 
  

  

  


  

    
Get path representation of this charstring at the specified font size.



  





  

Parameters:


    
  
    
  • 
      
        x
      
      
        (Integer, Float)
      
      
        (defaults to: 0)
      
      
        —
        
    new horizontal position.
    

    
      
    
    • 
  
    
  • 
      
        y
      
      
        (Integer, Float)
      
      
        (defaults to: 0)
      
      
        —
        
    new vertical position.
    

    
      
    
    • 
  
    
  • 
      
        font_size
      
      
        (Integer, Float)
      
      
        (defaults to: 72)
      
      
        —
        
    font size.
    

    
      
    
    • 
  




Returns:







  Source Code
  
lib/ttfunk/table/cff/charstring.rb, line 110

  
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def render(x: 0, y: 0, font_size: 72)

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  path.render(

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    x: x,

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    y: y,

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    font_size: font_size,

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    units_per_em: @top_dict.file.header.units_per_em,

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  )

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end