This gem allows you to easily use MiniMagick to resize your images and automatically includes an @2x version for use with retina.js. This is a forked version of jekyll-minimagick modified specifically to add the generation of @2x versions of all of the image sizes. This is very much still a work in progress. If you would like to help out, make a fork and then submit a pull request.
You have to have imagemagick install on your machine. If you are using a mac
and use homebrew, you can install imagemagick by runing brew install imagemagick.
Install the gem:
[sudo] gem install jekyll-retinamagick
In a plugin file within your Jekyll project's _plugins directory:
# _plugins/my-plugin.rb
require "jekyll-retinamagick"
Define presets in your _config.yml file, like this:
# _config.yml
retinamagick:
thumbnail:
source: img/photos/original
destination: img/photos/thumbnail
resize: "100x100"
medium:
source: img/photos/original
destination: img/photos/medium
resize: "600x400"
This configuration will create a 100x100 thumbnail for each image in
img/photos/original and put it in _site/img/photos/thumbnail. It will also
generate a 200x200 thumbnail and add an @2x between the file name and the
extention. It will also generate a 600x400 and 1200x800 image in a similar way
and then place them in _site/img/photos/medium.
Already using bundler to manage gems for your Jekyll project? Then just add
gem "jekyll-retinamagick"
to your gemfile and create the following plugin in your projects _plugins directory. I've called mine bundler.rb.
# _plugins/bundler.rb
require "rubygems"
require "bundler/setup"
require "jekyll-imagemagick"
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