This project is not maintained anymore

If you like it or continue to use it fork it please.

Crystal C bindings for MagickWand library, an interface to use the ImageMagick image processing libraries - see www.imagemagick.org

NOTE: Base on ImageMagick-7.0.8-66. MagickWand is a quite large library, if you find something missing contact me

• libMagickWand must be installed
• pkg-config must be available

• Add this to your application's shard.yml:

dependencies:
  magickwand-crystal:
    github: blocknotes/magickwand-crystal

Get image info:

require "magickwand-crystal"
LibMagick.magickWandGenesis    # lib init
wand = LibMagick.newMagickWand # lib init
if LibMagick.magickReadImage( wand, "test.png" )
  puts LibMagick.magickGetImageWidth wand
  puts LibMagick.magickGetImageHeight wand
end
LibMagick.destroyMagickWand wand  # lib deinit
LibMagick.magickWandTerminus      # lib deinit

Scale image and save in Jpeg format:

require "magickwand-crystal"
# ... lib init ...
LibMagick.magickReadImage wand, "test.png"
LibMagick.magickScaleImage wand, 320, 240
LibMagick.magickWriteImage wand, "test2.jpg"
# ... lib deinit ...

Convert to grayscale:

require "magickwand-crystal"
# ... lib init ...
LibMagick.magickReadImage wand, "test.jpg"
LibMagick.magickTransformImageColorspace wand, LibMagick::ColorspaceType::GRAYColorspace
LibMagick.magickWriteImage wand, "grayscale.jpg"
# ... lib deinit ...

See examples folder. There is also an example to generate an image on the fly with Kemal.

The functions mapped have the same names of the MagickWand C library but with the first letter in lowercase.

Example: MagickWandGenesis => LibMagick.magickWandGenesis

• MagickWand C Documentation
• MagickWand Examples in C

Branches with different ImageMagick version:

• im_6.9.7-3
• im_7.0.4-1

The Crystal Magic Wand ! :)

Sounds funny but I hope you find it a useful piece of software.

• Mattia Roccoberton - creator, maintainer, Crystal fan :)