Class: TTFunk::Table::Cmap

Inherits:
TTFunk::Table show all
Defined in:
lib/ttfunk/table/cmap.rb,
lib/ttfunk/table/cmap/format00.rb,
lib/ttfunk/table/cmap/format04.rb,
lib/ttfunk/table/cmap/format06.rb,
lib/ttfunk/table/cmap/format10.rb,
lib/ttfunk/table/cmap/format12.rb,
lib/ttfunk/table/cmap/subtable.rb

Overview

Character to Glyph Index Mapping (cmap) table.

Defined Under Namespace

Modules: Format00, Format04, Format06, Format10, Format12 Classes: Subtable

Instance Attribute Summary collapse

Attributes inherited from TTFunk::Table

#file, #length, #offset

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from TTFunk::Table

#exists?, #initialize, #raw, #tag

Constructor Details

This class inherits a constructor from TTFunk::Table

Instance Attribute Details

#tables ⇒ Array<TTFunk::Table::Cmap::Subtable> (readonly)

Encoding tables.

Returns:

Source Code
lib/ttfunk/table/cmap.rb, line 13
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def tables

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  @tables

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end

#version ⇒ Integer (readonly)

Table version.

Returns:

  • (Integer)
Source Code
lib/ttfunk/table/cmap.rb, line 9
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def version

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  @version

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end

Class Method Details

.encode(charmap, encoding) ⇒ Hash

Encode table.

Parameters:

  • charmap (Hash{Integer => Integer})
  • encoding (Symbol)

Returns:

  • (Hash) —
    • :charmap (Hash{Integer => Hash}) keys are the characrers in charset, values are hashes:
      • :old (Integer) - glyph ID in the original font.
      • :new (Integer) - glyph ID in the subset font. that maps the characters in charmap to a
    • :table (String) - serialized table.
    • :max_glyph_id (Integer) - maximum glyph ID in the new font.
Source Code
lib/ttfunk/table/cmap.rb, line 27
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def self.encode(charmap, encoding)

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  result = Cmap::Subtable.encode(charmap, encoding)

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  # pack 'version' and 'table-count'

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  result[:table] = [0, 1, result.delete(:subtable)].pack('nnA*')

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  result

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end







    
  


  

    
Instance Method Details


    
      

  

  
    #unicode  ⇒ Array<TTFunk::Table::Cmap::Subtable> 
  

  

  


  

    
Get Unicode encoding records.



  





  


Returns:







  Source Code
  
lib/ttfunk/table/cmap.rb, line 38

  
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def unicode

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  # Because most callers just call .first on the result, put tables with

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  # highest-number format first. Unsupported formats will be ignored.

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  @unicode ||=

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    @tables

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      .select { |table| table.unicode? && table.supported? }

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      .sort { |a, b| b.format <=> a.format }

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end