Convert PDF to Image with Dragonfly and Rails
Converting a PDF to an image using Rails and Dragonfly is actually quite simple. Check it out.
With other uploaders in rails, it's not super straightforward to convert a PDF to an image. But, by using Dragonfly's ImageMagick plugin, it's real simple.
Make sure you're using the ImageMagick plugin.
config/initializers/dragonfly.rb
Dragonfly.app.configure do
plugin :imagemagick
endAnd you'll want GhostScript installed on your machine.
The markup for it, though is simple. If you want a small, 200x200 thumbnail of a pdf, it's as simple as the following.
<%= image.image.thumb('200x200#', :format => 'png', :frame => 0).url %>Note: This assumes you have an image object that has an uploader mounted to an image accessor. You'll want to update to your application.
References:
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