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Within LTS Haskell 24.35 (ghc-9.10.3)

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  1. pixelFoldMap :: forall m px . (Pixel px, Monoid m) => (px -> m) -> Image px -> m

    JuicyPixels Codec.Picture.Types

    Fold over the pixel of an image with a raster scan order: from top to bottom, left to right. This functions is analog to the foldMap from the Foldable typeclass, but due to the Pixel constraint, Image cannot be made an instance of it.

  2. pixelMap :: (Pixel a, Pixel b) => (a -> b) -> Image a -> Image b

    JuicyPixels Codec.Picture.Types

    map equivalent for an image, working at the pixel level. Little example : a brightness function for an rgb image

    brightnessRGB8 :: Int -> Image PixelRGB8 -> Image PixelRGB8
    brightnessRGB8 add = pixelMap brightFunction
    where up v = fromIntegral (fromIntegral v + add)
    brightFunction (PixelRGB8 r g b) =
    PixelRGB8 (up r) (up g) (up b)
    

  3. pixelMapXY :: (Pixel a, Pixel b) => (Int -> Int -> a -> b) -> Image a -> Image b

    JuicyPixels Codec.Picture.Types

    Just like pixelMap only the function takes the pixel coordinates as additional parameters.

  4. toneMapping :: PixelF -> Image PixelRGBF -> Image PixelRGBF

    JuicyPixels Codec.Picture.Types

    Perform a tone mapping operation on an High dynamic range image.

  5. parMap :: Strategy b -> (a -> b) -> [a] -> [b]

    parallel Control.Parallel.Strategies

    A combination of parList and map, encapsulating a common pattern:

    parMap strat f = withStrategy (parList strat) . map f
    

  6. seqMap :: Strategy k -> Strategy v -> Strategy (Map k v)

    parallel Control.Seq

    Evaluate the keys and values of a map according to the given strategies.

  7. contramapRep :: Representable f => (a -> b) -> f b -> f a

    adjunctions Data.Functor.Contravariant.Rep

    No documentation available.

  8. contramapWithRep :: Representable f => (b -> Either a (Rep f)) -> f a -> f b

    adjunctions Data.Functor.Contravariant.Rep

    contramapWithRep f p ≡ tabulate $ either (index p) id . f
    

  9. fmapRep :: Representable f => (a -> b) -> f a -> f b

    adjunctions Data.Functor.Rep

    No documentation available.

  10. ifoldMapRep :: (Representable r, Foldable r, Monoid m) => (Rep r -> a -> m) -> r a -> m

    adjunctions Data.Functor.Rep

    No documentation available.

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