FFI::GMagick

FFI wrapper for the GraphicsMagick image processing library.

NOTE: This library probably has memory leaks that you might need to be aware of. You have been warned!

This Gem provides an FFI wrapper for the GraphicsMagick image processing library. All of the other *Magick Gems I found either only worked with ImageMagick or were simply wrappers around the command line interfaces. These are great Gems but I needed to work with images in RAM and not hit the hard drive at all. So, I created this Gem to allow me to work with images completely in RAM without touching the file system at all.

Add this line to your application's Gemfile:

gem 'ffi-gmagick'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ffi-gmagick

You also must have a recent version of GraphicsMagick installed and the library in your systems load path. Don't worry about the load path, most installers do that for you.

Basic usage is as following:

require 'ffi/gmagick'

WATERMARK = FFI::GMagick::Image.new
WATERMARK.from_blob(File.open("watermark.png").read)

image = FFI::GMagick::Image.new
image.from_blob(File.open("./my_picture.jpg").read)

new_thumbnail = image.thumbnail(100, 100, true)
new_thumbnail.compose(WATERMARK)

new_thumbnail.to_file("./my_thumb.jpg")

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request