50 lines
1.9 KiB
Haskell
50 lines
1.9 KiB
Haskell
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module Main where
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import Prelude as P
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import Graphics.Image
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import Graphics.Image.Interface as I
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import Graphics.Image.ColorSpace as C
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import Data.Bits
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import Data.Strings
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import Text.XML.HXT.DOM.Util
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import Data.List.Split
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segmentation = 8
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seed = "49474354467B54686973546865536563726574466C61677D"
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main :: IO ()
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main = do
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rawImage <- readImageRGB VU "./original_gimped.jpg"
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let (width, height) = dims rawImage
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let segmented = segment rawImage
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let xorred = xorColor segmented
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let newImage = segmentToImage xorred height
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ret <- writeImage "./output.jpg" newImage
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return ret
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segment :: Image VU RGB Double -> [[Pixel RGB Double]]
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segment image = reverse $ I.foldl
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(\(head:tail) -> \val ->
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if length head < segmentation
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then (val:head):tail
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else [val]:(reverse head):tail
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) [[]] image
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xorColor :: [[Pixel RGB Double]] -> [[Pixel RGB Double]]
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xorColor segments = P.map (\pixels -> P.zipWith doXorring [0..] pixels) segments
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doXorring :: Int -> Pixel RGB Double -> Pixel RGB Double
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doXorring index pixel@(PixelRGB red green blue) =
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let step = index * 6
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seedPartRed = hexStringToInt $ strDrop(step) $ strTake(step + 2) seed
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seedPartGreen = hexStringToInt $ strDrop(step + 2) $ strTake(step + 4) seed
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seedPartBlue = hexStringToInt $ strDrop(step + 4) $ strTake(step + 4) seed
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redHex = round $ red * 255 :: Int
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greenHex = round $ green * 255 :: Int
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blueHex = round $ blue * 255 :: Int
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xorRed = (fromIntegral (redHex `xor` seedPartRed)) / 255
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xorGreen = (fromIntegral (greenHex `xor` seedPartGreen)) / 255
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xorBlue = (fromIntegral (blueHex `xor` seedPartBlue)) / 255
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in PixelRGB xorRed xorGreen xorBlue
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segmentToImage :: [[Pixel RGB Double]] -> Int -> Image VU RGB Double
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segmentToImage segments width = fromLists (chunksOf width (concat segments))
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