Class: CuteRB::CLI

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

Instance Method Summary collapse

Constructor Details

#initialize(text, image, output) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/cuterb.rb', line 11

def initialize(text, image, output)
  @qr = RQRCode::QRCode.new(text, :level => :h)
  @qr = @qr.qrcode if @qr.respond_to?(:qrcode)

  @image = Magick::ImageList.new(image).first
  short = [@image.columns, @image.rows].min
  raise "#{image} too small." if short < @qr.module_count

  # crop image
  if @image.columns != @image.rows
    begin
      tmp = Tempfile.new(['cuterb-canny', '.png'])
      system("convert #{image} -canny 0x1+10%+30% #{tmp.path}")
      raise 'convert error' unless $?.success?
      canny = Magick::ImageList.new(tmp.path).first
      start = Utils.contents_area(canny)
    rescue RuntimeError, Magick::ImageMagickError, Magick::FatalImageMagickError, Magick::DestroyedImageError => e
      start = 0
    end

    if @image.columns == short
      @image = @image.crop(0, start, short, start+short)
    else
      @image = @image.crop(start, 0, start+short, short)
    end
  end
  @image = @image.quantize(256, Magick::GRAYColorspace)

  bg = Magick::Image.new(@image.columns, @image.columns) { self.background_color = "white" }
  @image = bg.composite(@image, 0, 0, Magick::OverCompositeOp).normalize.contrast(true).contrast(true)
  @output = output
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/cuterb.rb', line 44

def run()
  pixel = qrpixel()
  overlay(pixel)
  @image.write(@output)
  return 0
end