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Haskell library to load & save pictures
Haskell C Other

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Build Status Hackage


This library provides saving & loading of different picture formats for the Haskell language. The aim of the library is to be as lightweight as possible, you ask it to load an image, and it'll dump you a big Vector full of juicy pixels. Or squared pixels, or whatever, as long as they're unboxed.


The library documentation can be accessed on Hackage


For the user of REPA, check-out JuicyPixels-repa on GitHub or Hackage

For the user of Gloss, check-out gloss-juicy on GitHub or Hackage


  • PNG (.png)

    • Reading

      • 1,2,4,8 bits loading, Grayscale, 24bits, 24 bits with alpha, interleaved & filtered (fully compliant with the standard, tested against png suite).
    • Writing

      • 8bits RGB (non interleaved)
      • 8bits RGBA (non interleaved)
      • 8bits greyscale (non interleaved)
      • 16bits greyscale (non interleaved)
      • 16bits RGB (non interleaved)
      • 16bits RGBA (non interleaved)
  • Bitmap (.bmp) (mainly used as a debug output format)

    • Reading

      • 24bits (RGB) images
      • 8bits (greyscale & paletted) images
    • Writing

      • 32bits (RGBA) per pixel images
      • 24bits (RGB) per pixel images
      • 8 bits greyscale (with palette)
  • Jpeg (.jpg, .jpeg)

    • Reading normal and interlaced baseline DCT image
      • YCbCr (default) CMYK/YCbCrK/RGB colorspaces
    • Writing non-interlaced JPG
  • Gif (.gif)

    • Reading single image & animated Gif image, handles interlaced images.
    • Writing single & animated Gif images.
  • Radiance (.pic, .hdr)

    • Reading
    • Writing
  • Tga

    • Reading
      • 8, 16, 24 & 32 bits
      • paletted and unpaletted
      • RLE encoded or uncompressed
    • Writing
      • uncompressed 8bits (Pixel8)
      • uncompressed 24bits (PixelRGB8)
      • uncompressed 32bits (PixelRGBA8)
  • Tiff

    • Reading

      • 2, 4, 8, 16 bit depth reading (planar and contiguous for each)
      • CMYK, YCbCr, RGB, RGBA, Paletted, Greyscale
      • Uncompressed, PackBits, LZW
    • Writing

      • 8 and 16 bits
      • CMYK, YCbCr, RGB, RGBA, Greyscale
      • Uncompressed

I love juicy pixels

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