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1. 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

2. 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
   

3. 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)
   

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

   JuicyPixels	Codec.Picture

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

5. encodeDynamicBitmap :: DynamicImage -> Either String ByteString

   JuicyPixels	Codec.Picture

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

   • ImageY8
   • ImageRGB8
   • ImageRGBA8

6. 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)
   

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

   JuicyPixels	Codec.Picture

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

8. writeBitmap :: BmpEncodable pixel => FilePath -> Image pixel -> IO ()

   JuicyPixels	Codec.Picture

   Write an image in a file use the bitmap format.

9. writeDynamicBitmap :: FilePath -> DynamicImage -> IO (Either String Bool)

   JuicyPixels	Codec.Picture

   Write a dynamic image in a .bmp image file if possible. The same restriction as encodeDynamicBitmap apply.

10. module Codec.Picture.Bitmap

    Modules used for Bitmap file (.bmp) file loading and writing

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