Class: TTFunk::Table::Cff::FontDict

Inherits:
Dict show all
Defined in:
lib/ttfunk/table/cff/font_dict.rb

Overview

CFF Font dict.

Constant Summary collapse

PLACEHOLDER_LENGTH =

Length of placeholders.

5
OPERATORS =

Operators we care about in this dict.

{ private: 18 }.freeze
OPERATOR_CODES =

Inverse operator mapping.

OPERATORS.invert

Constants inherited from Dict

Dict::MAX_OPERANDS, Dict::OPERAND_BZERO, Dict::OPERATOR_BZERO, Dict::VALID_SCI_EXPONENT_RE, Dict::VALID_SCI_SIGNIFICAND_RE, Dict::WIDE_OPERATOR_ADJUSTMENT, Dict::WIDE_OPERATOR_BZERO

Instance Attribute Summary collapse

Attributes inherited from SubTable

#file, #length, #table_offset

Instance Method Summary collapse

Methods inherited from Dict

#[], #[]=, #each

Methods inherited from SubTable

#eot?, #read

Constructor Details

#initialize(top_dict, file, offset, length = nil) ⇒ FontDict

Returns a new instance of FontDict.

Parameters:

  • top_dict (TTFunk::Table:Cff::TopDict)
  • file (TTFunk::File)
  • offset (Integer)
  • length (Integer) (defaults to: nil)
Source Code
lib/ttfunk/table/cff/font_dict.rb, line 25
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def initialize(top_dict, file, offset, length = nil)

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  @top_dict = top_dict

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  super(file, offset, length)

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end

Instance Attribute Details

#top_dict ⇒ TTFunk::Table::Cff::TopDict (readonly)

Top dict.

Returns:

Source Code
lib/ttfunk/table/cff/font_dict.rb, line 19
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def top_dict

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  @top_dict

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end

Instance Method Details

#encode ⇒ TTFunk::EncodedString

Encode dict.

Returns:

Source Code
lib/ttfunk/table/cff/font_dict.rb, line 33
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def encode

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  EncodedString.new do |result|

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    each do |operator, operands|

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      case OPERATOR_CODES[operator]

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      when :private

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        result << encode_private

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      else

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        operands.each { |operand| result << encode_operand(operand) }

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      end

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      result << encode_operator(operator)

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    end

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  end

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end







    
      

  

  
    #finalize(new_cff_data)  ⇒ void 
  

  

  


  

    
This method returns an undefined value.
Finalize dict.



  





  

Parameters:








  Source Code
  
lib/ttfunk/table/cff/font_dict.rb, line 52

  
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def finalize(new_cff_data)

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  encoded_private_dict = private_dict.encode

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  encoded_offset = encode_integer32(new_cff_data.length)

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  encoded_length = encode_integer32(encoded_private_dict.length)

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  new_cff_data.resolve_placeholder(:"private_length_#{@table_offset}", encoded_length)

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  new_cff_data.resolve_placeholder(:"private_offset_#{@table_offset}", encoded_offset)

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  private_dict.finalize(encoded_private_dict)

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  new_cff_data << encoded_private_dict

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end







    
      

  

  
    #private_dict  ⇒ TTFunk::Table::Cff::PrivateDict? 
  

  

  


  

    
Private dict.



  





  


Returns:







  Source Code
  
lib/ttfunk/table/cff/font_dict.rb, line 67

  
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def private_dict

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  @private_dict ||=

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    if (info = self[OPERATORS[:private]])

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      private_dict_length, private_dict_offset = info

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      PrivateDict.new(

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        file,

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        top_dict.cff_offset + private_dict_offset,

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        private_dict_length,

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      )

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    end

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end