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require 'rmagick'

image_list = Magick::ImageList.new("image1.png", "image2.png", "image3.png")
image_list.write("combine.png")

require 'rmagick'
class Combiner
include Magick

  def self.combine
    #this will be the final image
    big_image = ImageList.new

    #this is an image containing first row of images
    first_row = ImageList.new
    #this is an image containing second row of images
    second_row = ImageList.new

    #adding images to the first row (Image.read returns an Array, this is why .first is needed)
    first_row.push(Image.read("1.png").first)
    first_row.push(Image.read("2.png").first)

    #adding first row to big image and specify that we want images in first row to be appended in a single image on the same row - argument false on append does that
    big_image.push (first_row.append(false))

    #same thing for second row
    second_row.push(Image.read("3.png").first)
    second_row.push(Image.read("4.jpg").first)
    big_image.push(second_row.append(false))

    #now we are saving the final image that is composed from 2 images by sepcify append with argument true meaning that each image will be on a separate row
    big_image.append(true).write("big_image.jpg")
  end
end

# Replace this with the path to the images you want to combine
images = [
  "image1.jpg",
  "image2.jpg"
]

processed_image = MiniMagick::Tool::Montage.new do |image|
  image.geometry "x700+0+0"
  image.tile "#{images.size}x1"
  images.each {|i| image << i}
  image << "output.jpg"
end