Class: TTFunk::Directory

Inherits:
Object
  • Object
show all
Defined in:
lib/ttfunk/directory.rb

Overview

SFNT table directory.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(io, offset = 0) ⇒ Directory

Returns a new instance of Directory.

Source Code
lib/ttfunk/directory.rb, line 14
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def initialize(io, offset = 0)

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  io.seek(offset)

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  # https://www.microsoft.com/typography/otspec/otff.htm#offsetTable

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  # We're ignoring searchRange, entrySelector, and rangeShift here, but

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  # skipping past them to get to the table information.

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  @scaler_type, table_count = io.read(12).unpack('Nn')

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  @tables = {}

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  table_count.times do

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    tag, checksum, offset, length = io.read(16).unpack('a4N*')

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    @tables[tag] = {

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      tag: tag,

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      checksum: checksum,

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      offset: offset,

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      length: length,

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    }

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  end

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end







  



  

    
Instance Attribute Details

    
      
      
      

  

  
    #scaler_type  ⇒ Integer  (readonly)
  

  

  


  

    
Scaler type



  





  


Returns:


    
  
    
  • 
      
      
        (Integer)
      
      
      
    
    • 
  







  Source Code
  
lib/ttfunk/directory.rb, line 12

  
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def scaler_type

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  @scaler_type

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end







    
      
      
      

  

  
    #tables  ⇒ Hash{String => Hash}  (readonly)
  

  

  


  

    
Table descriptors



  





  


Returns:


    
  
    
  • 
      
      
        (Hash{String => Hash})
      
      
      
    
    • 
  







  Source Code
  
lib/ttfunk/directory.rb, line 8

  
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def tables

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  @tables

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end