UNC-Libraries/hy-c

# frozen_string_literal: true
# [hyc-override] https://github.com/samvera/hydra-derivatives/blob/v3.8.0/lib/hydra/derivatives/processors/image.rb
Hydra::Derivatives::Processors::Image.class_eval do
  protected
    # [hyc-override] Updated to work with graphicsmagick instead of imagemagick
  def create_resized_image
    create_resized_image_with_graphicsmagick
  end

  def create_resized_image_with_graphicsmagick
    create_image do |temp_file|
      if size
        # remove layers and resize using convert instead of mogrify
        MiniMagick::Tool::Convert.new do |cmd|
          cmd << temp_file.path # input
          cmd.flatten
          cmd.resize(size)
          cmd << temp_file.path # output
        end
      end
    end
  end

  def create_image
    xfrm = selected_layers(load_image_transformer)
    yield(xfrm) if block_given?
    xfrm.format(directives.fetch(:format))
    xfrm.quality(quality.to_s) if quality

    # [hyc-override] check image profile of original file, and negate if background is black
    if source_data['backgroundColor'] == '#FFFFFFFFFFFF0000'
      Rails.logger.info "\n\n######\nbackground color is black\n######\n\n"
      xfrm.negate
    end

    write_image(xfrm)
  end

    # [hyc-override] New method which returns the details of the image being processed
  def source_data
    MiniMagick::Image.open(source_path).details
  end
end