{-# LANGUAGE UnicodeSyntax #-}
module Main where

import Control.Applicative ((<$>))
import Data.List (foldr1)
import Graphics.GD (copyRegion, loadPngFile, newImage, savePngFile)
import System.Directory (getCurrentDirectory, getDirectoryContents)
import System.FilePath ((</>))

main ∷ IO ()
main = do
  image_files ← map ("img" </>) . filter (`notElem` [".",".."]) <$> getDirectoryContents "img"
  images ← mapM loadPngFile image_files
  new_image ← newImage (1366 * length images, 768)
  mapM (\(i,s) → copyRegion (0,0) (1366,768) s (1366 * i,0) new_image) $ zip [0..] images
  savePngFile "POLOTNISHE.png" new_image