iOS Retina Assets Test

testassets.rb

require 'fileutils'

path = ARGV[0]
ok = 0
fail = 0

Dir.glob("#{path}/*.png", File::FNM_DOTMATCH) do |f|

  unless f.end_with? "@2x.png" or f.end_with? "@3x.png"

    s2_f = File.basename(f, ".png") + "@2x.png"
    s3_f = File.basename(f, ".png") + "@3x.png"
    s2_f = File.join(path, s2_f)
    s3_f = File.join(path, s3_f)

    if not File.exist?(s2_f)

      puts "Missing File: #{s2_f}"
      fail = fail + 1

    elsif not File.exist?(s3_f)

      puts "Missing File: #{s3_f}"
      fail = fail + 1

    else

      s1_x, s1_y = IO.read(f)[0x10..0x18].unpack('NN')
      s2_x, s2_y = IO.read(s2_f)[0x10..0x18].unpack('NN')
      s3_x, s3_y = IO.read(s3_f)[0x10..0x18].unpack('NN')

      is_ok = true

      if s1_x*2 != s2_x || s1_y*2 != s2_y
        puts "Bad Dimensions: #{s2_f}; Found: #{s2_x}x#{s2_y}; Expected: #{s1_x*2}x#{s1_y*2}"
        fail = fail + 1
        is_ok = false
      end

      if s1_x*3 != s3_x || s1_y*3 != s3_y
        puts "Bad Dimensions: #{s3_f}; Found: #{s3_x}x#{s3_y}; Expected: #{s1_x*3}x#{s1_y*3}"
        fail = fail + 1
        is_ok = false
      end

      if is_ok
        ok = ok + 1
      end

    end

  end

end if File.directory?(path)

puts "OK: #{ok}; Fail: #{fail}"