Class: Emoji::Extractor

Inherits:
Object
  • Object
show all
Defined in:
lib/emoji/extractor.rb

Defined Under Namespace

Classes: GlyphIndex

Constant Summary collapse

EMOJI_TTF = 
"/System/Library/Fonts/Apple Color Emoji.ttc"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(size, images_path) ⇒ Extractor

Returns a new instance of Extractor.



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# File 'lib/emoji/extractor.rb', line 10

def initialize(size, images_path)
  @size = size
  @images_path = images_path
end

Instance Attribute Details

#images_path ⇒ Object (readonly)

Returns the value of attribute images_path.



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# File 'lib/emoji/extractor.rb', line 8

def images_path
  @images_path
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/emoji/extractor.rb', line 8

def size
  @size
end

Instance Method Details

#each(&block) ⇒ Object 



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# File 'lib/emoji/extractor.rb', line 15

def each(&block)
  return to_enum(__method__) unless block_given?

  File.open(EMOJI_TTF, 'rb') do |file|
    font_offsets = parse_ttc(file)
    file.pos = font_offsets[0]

    tables = parse_tables(file)
    glyph_index = extract_glyph_index(file, tables)

    each_glyph_bitmap(file, tables, glyph_index, &block)
  end
end

#extract! ⇒ Object 



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# File 'lib/emoji/extractor.rb', line 29

def extract!
  each do |glyph_name, type, binread|
    if emoji = glyph_name_to_emoji(glyph_name)
      image_filename = "#{images_path}/#{emoji.image_filename}"
      FileUtils.mkdir_p(File.dirname(image_filename))
      File.open(image_filename, 'wb') { |f| f.write binread.call }
    end
  end
end