Convert png to gif_Ruby_编程开发_程序员俱乐部

require "tempfile"
class Gif
  def self.convert_jpg_to_gif(arr)
    if arr.length == 1
      a = "#{Rails.root}/public/gif/1.jpeg"
      b = "#{Rails.root}/public/gif/2.jpeg"
      c = arr[0]
      d = "#{Rails.root}/public/gif/4.jpeg"
    elsif arr.length == 2
      a = arr[0]
      b = "#{Rails.root}/public/gif/2.jpeg"
      c = arr[1]
      d = "#{Rails.root}/public/gif/4.jpeg"
    elsif arr.length == 3
      a = arr[0]
      b = arr[1]
      c = arr[-1]
      d = "#{Rails.root}/public/gif/4.jpeg"
    elsif arr.length == 4
      a = arr[0]
      b = arr[1]
      c = arr[-1]
      d = arr[2]
    end
    system("convert #{b} -background 'rgba(0,0,0,0.0)' -rotate \"-20\" #{Rails.root}/public/gif/22.gif")
    system("convert #{d} -background 'rgba(0,0,0,0.0)' -rotate \"-20\" #{Rails.root}/public/gif/41.gif")

    system("composite -gravity NorthEast -geometry 18x18+102+32  #{a} #{Rails.root}/public/gif/1231.gif #{Rails.root}/public/gif/a.gif ")
    system("composite -gravity SouthWest -geometry 22x22+15+48   #{Rails.root}/public/gif/22.gif #{Rails.root}/public/gif/a.gif #{Rails.root}/public/gif/a.gif")
    system("composite -gravity SouthEast -geometry 26x26+86+26   #{c} #{Rails.root}/public/gif/a.gif #{Rails.root}/public/gif/a.gif ")  #71X26
    system("composite -gravity SouthEast -geometry 16x16+24+81   #{Rails.root}/public/gif/41.gif #{Rails.root}/public/gif/a.gif  #{Rails.root}/public/gif/b1.gif ")

    system("convert #{b} -background 'rgba(0,0,0,0.0)' -rotate \"+20\" #{Rails.root}/public/gif/22.gif")

    system("composite -gravity NorthEast -geometry 18x18+102+32  #{a}  #{Rails.root}/public/gif/1232.gif  #{Rails.root}/public/gif/a1.gif ")
    system("composite -gravity SouthWest -geometry 22x22+19+49   #{Rails.root}/public/gif/22.gif #{Rails.root}/public/gif/a1.gif  #{Rails.root}/public/gif/a1.gif ")
    system("composite -gravity SouthWest -geometry 26x26+71+26   #{c} #{Rails.root}/public/gif/a1.gif  #{Rails.root}/public/gif/a1.gif ")  #71X26
    system("composite -gravity SouthEast -geometry 16x16+24+81   #{Rails.root}/public/gif/41.gif #{Rails.root}/public/gif/a1.gif  #{Rails.root}/public/gif/b2.gif ")

    system("convert -delay 100 -dispose Background #{Rails.root}/public/gif/b1.gif  #{Rails.root}/public/gif/b2.gif -loop 0 #{Rails.root}/public/gif/b3.gif")
    "#{Rails.root}/public/gif/b3.gif"
  end
end