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1. type TypeMap = HashMap TypeRep Dynamic

   yesod-core	Yesod.Core.Types

   No documentation available.

2. foldl1Map :: forall (f :: Type -> Type) b a . Foldable f => (b -> b -> b) -> (a -> b) -> T f a -> b

   non-empty	Data.NonEmpty

   It holds:

   foldl1Map f g = foldl1 f . fmap g
   

   but foldl1Map does not need a Functor instance.

3. colorMap :: Pixel a => (PixelBaseComponent a -> PixelBaseComponent a) -> a -> a

   JuicyPixels	Codec.Picture

   Apply a function to each component of a pixel. If the color type possess an alpha (transparency channel), it is treated like the other color components.

4. decodeBitmap :: ByteString -> Either String DynamicImage

   JuicyPixels	Codec.Picture

   Try to decode a bitmap image. Right now this function can output the following image:

   • ImageY8
   • ImageRGB8
   • ImageRGBA8

5. dynamicMap :: (forall pixel . Pixel pixel => Image pixel -> a) -> DynamicImage -> a

   JuicyPixels	Codec.Picture

   Helper function to help extract information from dynamic image. To get the width of a dynamic image, you can use the following snippet:

   dynWidth :: DynamicImage -> Int
   dynWidth img = dynamicMap imageWidth img
   

6. dynamicPixelMap :: (forall pixel . Pixel pixel => Image pixel -> Image pixel) -> DynamicImage -> DynamicImage

   JuicyPixels	Codec.Picture

   Equivalent of the pixelMap function for the dynamic images. You can perform pixel colorspace independant operations with this function. For instance, if you want to extract a square crop of any image, without caring about colorspace, you can use the following snippet.

   dynSquare :: DynamicImage -> DynamicImage
   dynSquare = dynamicPixelMap squareImage
   
   squareImage :: Pixel a => Image a -> Image a
   squareImage img = generateImage (\x y -> pixelAt img x y) edge edge
   where edge = min (imageWidth img) (imageHeight img)
   

7. encodeBitmap :: BmpEncodable pixel => Image pixel -> ByteString

   JuicyPixels	Codec.Picture

   Encode an image into a bytestring in .bmp format ready to be written on disk.

8. encodeDynamicBitmap :: DynamicImage -> Either String ByteString

   JuicyPixels	Codec.Picture

   Encode a dynamic image in BMP if possible, supported images are:

   • ImageY8
   • ImageRGB8
   • ImageRGBA8

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

   JuicyPixels	Codec.Picture

   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)
   

10. readBitmap :: FilePath -> IO (Either String DynamicImage)

    JuicyPixels	Codec.Picture

    Try to load a .bmp file. The colorspace would be RGB, RGBA or Y.

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