Class: Tortoise::Presenter

Inherits:
Object
  • Object
show all
Defined in:
lib/tortoise/presenter.rb

Constant Summary collapse

PIXEL_SIZE = 
5

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(interpreter) ⇒ Presenter

Returns a new instance of Presenter.



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# File 'lib/tortoise/presenter.rb', line 9

def initialize(interpreter)
  @canvas = interpreter.canvas
end

Instance Attribute Details

#canvas ⇒ Object (readonly)

Returns the value of attribute canvas.



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# File 'lib/tortoise/presenter.rb', line 5

def canvas
  @canvas
end

Instance Method Details

#to_ascii ⇒ Object 



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# File 'lib/tortoise/presenter.rb', line 13

def to_ascii
  oriented_canvas.inject('') do |ascii, column|
    ascii += column.map { |pixel| pixel ? 'X ' : '. ' }.join.strip + "\n"
  end
end

#to_html ⇒ Object 



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# File 'lib/tortoise/presenter.rb', line 19

def to_html
  <<-HTML
    <!DOCTYPE html>
    <html>
    #{html_head}
    <body>
      #{html_canvas}
    </body>
    </html>
  HTML
end

#to_png ⇒ Object 



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# File 'lib/tortoise/presenter.rb', line 31

def to_png
  white = ChunkyPNG::Color('white')
  black = ChunkyPNG::Color('black')
  png   = ChunkyPNG::Image.new(@canvas.size, @canvas.size)

  @canvas.each_with_index do |column, x|
    column.reverse.each_with_index do |pixel, y|
      png[x, y] = pixel ? black : white
    end
  end

  png.to_blob
end