Class: Imgen::Image

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

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Image

main entry point



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# File 'lib/imgen.rb', line 8

def initialize(options)
  1.upto(options[:quantity]) do
    img = Magick::Image.new(options[:width], options[:height])
    colors = {r: 0, g: 0, b: 0}
    color_dominant = colors.keys.to_a.sample
    options[:color_dominant] = color_dominant

    make_image(img, options)
  end
end

Instance Method Details

#make_image(img, options) ⇒ Object

image processing



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# File 'lib/imgen.rb', line 20

def make_image(img, options)
  last_pixel = {}
  new_pixel = {}

  (0..img.columns).each do |x|
    (0..img.rows).each do |y|
      case options[:method]
      when :lines
        if !last_pixel.empty?
          if last_pixel[:color_dominant] == 100
            new_pixel[options[:color_dominant]] = 0
          elsif last_pixel[:color_dominant] == 0
            new_pixel[options[:color_dominant]] = rand(1..10) + last_pixel[options[:color_dominant]]
          else
            new_pixel[options[:color_dominant]] = rand(-10..10) + last_pixel[options[:color_dominant]]
          end
        else
          new_pixel[:r] = (options[:color_dominant] == :r) ? rand(0..100) : 0
          new_pixel[:g] = (options[:color_dominant] == :g) ? rand(0..100) : 0
          new_pixel[:b] = (options[:color_dominant] == :b) ? rand(0..100) : 0
          new_pixel[:a] = rand(0..100)
        end
      when :noise
        new_pixel[:r] = (options[:color_dominant] == :r) ? rand(0..100) : 0
        new_pixel[:g] = (options[:color_dominant] == :g) ? rand(0..100) : 0
        new_pixel[:b] = (options[:color_dominant] == :b) ? rand(0..100) : 0
        new_pixel[:a] = rand(0..100)
      end

      img.pixel_color(x,y,"rgba(#{new_pixel[:r]}%, #{new_pixel[:g]}%, #{new_pixel[:b]}%, #{new_pixel[:a]}%)")
      last_pixel = {r: new_pixel[:r], g: new_pixel[:g], b: new_pixel[:b], a: new_pixel[:a]}

      if options[:debug]
        print "R#{new_pixel[:r].to_s.ljust(3)}"
        print "G#{new_pixel[:g].to_s.ljust(3)}"
        print "B#{new_pixel[:b].to_s.ljust(3)}"
        print "A#{new_pixel[:a].to_s.ljust(3)}| "
      end
    end
    print "\n" if options[:debug]
  end

  img_dir = options[:directory]
  img_ext = options[:format]

  unless File.directory?(img_dir)
    FileUtils.mkdir_p(img_dir)
  end

  counter = 0
  img_uniq = "_0"
  filename_path = "#{img_dir}/#{options[:width]}x#{options[:height]}#{img_uniq}.#{img_ext}"

  until !File.exists?(filename_path)
    counter += 1
    img_uniq = "_" + counter.to_s
    filename_path = "#{img_dir}/#{options[:width]}x#{options[:height]}#{img_uniq}.#{img_ext}"
  end

  puts "writing #{filename_path} to disk"
  img.write(filename_path)

  if options[:display]
    begin
      puts "displaying #{filename_path} in X11..."
      img.display
    rescue
      puts "could not display #{filename_path}"
    end
  end
end