Class: AsciiArt

Inherits:
Object
  • Object
show all
Defined in:
lib/asciiart.rb,
lib/asciiart/version.rb

Constant Summary collapse

VERSION = 
"0.0.1"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path_to_file) ⇒ AsciiArt

Returns a new instance of AsciiArt.



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# File 'lib/asciiart.rb', line 9

def initialize(path_to_file)
  @file = File.new(path_to_file, "r")
end

Instance Attribute Details

#file ⇒ Object

Returns the value of attribute file.



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# File 'lib/asciiart.rb', line 6

def file
  @file
end

#image_chars ⇒ Object 



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# File 'lib/asciiart.rb', line 46

def image_chars
  @image_chars ||= [" ", ".", "~", ":", "+", "=", "o", "*", "x", "^", "%", "#", "@", "$", "M", "W"]
end

Instance Method Details

#to_ascii_art ⇒ Object 



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# File 'lib/asciiart.rb', line 13

def to_ascii_art

  img = Magick::Image.read(file).first

  new_width   = 100
  scale       = (new_width.to_f / img.columns)
  new_height  = ((img.rows * scale) / 2).to_i

  img.resize!(new_width, new_height)

  img = img.quantize(image_chars.length, Magick::GRAYColorspace)
  img = img.normalize

  quantum_calc = Magick::QuantumRange / Magick::QuantumPixel.to_i
  
  output = ""
  
  border = '+' + ('-' * new_width) + '+' + "\n"
  output << border  

  img.view(0, 0, new_width, new_height) do |view|
    new_height.times do |i|
    output << '|'
    new_width.times { |j| output << image_chars[view[i][j].red/quantum_calc] }
    output << "|\n"
  end
  end
  
  output << border

  output
end