Thumbnailer
A simple way to create thumbnails.
Installation
Add this line to your application's Gemfile:
gem 'thumbnailer'And then execute:
$ bundle
Or install it yourself as:
$ gem install thumbnailer
Usage
Creating from a file
thumb = Thumbnailer::File.new('ruby-logo.png')
thumb.create # creates thumb_ruby-logo.png with 1/10 of the original sizeCreating from a file mask
thumb = Thumbnailer::Files.new('*.png')
thumb.create # creates thumb_<file>.png filesCreating from a PDF file
thumb = Thumbnailer::PDF.new('test.pdf')
thumb.create # creates thumb_<file>_<page>.png files for all pagesOptions
We can send some options to customize the output
thumb = Thumbnailer::File.new('ruby-logo.png', prefix: 'custom_thumb_')
thumb.create # creates custom_thumb_ruby-logo.png with 1/10 of the original size
thumb = Thumbnailer::File.new('ruby-logo.png', ratio: 5)
thumb.create # creates thumb_ruby-logo.png with 1/5 of the original size
thumb = Thumbnailer::File.new('ruby-logo.png', dir: '/tmp')
thumb.create # creates thumb_ruby-logo.png on /tmp
thumb = Thumbnailer::File.new('ruby-logo.png', width: 35, height: 35)
thumb.create # creates thumb_ruby-logo.png with 35 x 35 size
thumb = Thumbnailer::PDF.new('test.pdf', page: 2)
thumb.create # creates thumb_<file>_2.png files for page 2
thumb = Thumbnailer::PDF.new('test.pdf', pages: [1, 3])
thumb.create # creates thumb_<file>_<page>.png files for pages 1 and 3Development
After checking out the repo, run bin/setup to install dependencies. Then, run
rake test to run the tests. You can also run bin/console for an interactive
prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To
release a new version, update the version number in version.rb, and then run
bundle exec rake release, which will create a git tag for the version, push
git commits and tags, and push the .gem file to
rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/taq/thumbnailer.