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Contents
# frozen_string_literal: true
begin
require "image_processing"
rescue LoadError
raise LoadError, <<~ERROR.squish
Generating image variants require the image_processing gem.
Please add `gem 'image_processing', '~> 1.2'` to your Gemfile.
ERROR
end
module ActiveStorage
module Transformers
class ImageProcessingTransformer < Transformer
private
def process(file, format:)
processor.
source(file).
loader(page: 0).
convert(format).
apply(operations).
call
end
def processor
ImageProcessing.const_get(ActiveStorage.variant_processor.to_s.camelize)
end
def operations
transformations.each_with_object([]) do |(name, argument), list|
if name.to_s == "combine_options"
raise ArgumentError, <<~ERROR.squish
Active Storage's ImageProcessing transformer doesn't support :combine_options,
as it always generates a single ImageMagick command.
ERROR
end
if argument.present?
list << [ name, argument ]
end
end
end
end
end
end
Version data entries
19 entries across 19 versions & 3 rubygems