JPEG and PNG compression processor for Paperclip. Under the hood, jpegtran and optipng libraries are used.
Add to your Gemfile.
gem 'paperclip-compression'This is the basic usage. This will compress both JPEG and PNG files with the default options.
class User < ActiveRecord::Base
has_attached_file :avatar,
styles: { medium: '300x300>', thumb: '100x100>' },
processors: [:thumbnail, :compression]
endDisable PNG compression and change default options for JPEG compression for thumb.
class User < ActiveRecord::Base
has_attached_file :avatar,
styles: {
medium: '300x300>',
thumb: {
geometry: '100x100>',
processor_options: {
compression: {
png: false,
jpeg: '-copy none -optimize'
}
}
}
},
processors: [:thumbnail, :compression]
endDefault options for jpegtran is -copy none -optimize -perfect and default options for optipng is -o 5.
You can use paperclip's default options to define global defaults for all your paperclip attachments. Use compression key.
Example for config/application.rb:
module YourApp
class Application < Rails::Application
# Other code...
config.paperclip_defaults = { :compression => { :png => false, :jpeg => '-optimize' } }
end
endExample for Rails initializer:
Paperclip::Attachment.default_options[:compression] = { :png => false, :jpeg => '-optimize' }For more information about paperclip defaults: https://github.com/thoughtbot/paperclip#defaults
paperclip-compression is released under the MIT License.