rails--rails/activestorage/CHANGELOG.md

• Use the ImageProcessing gem for Active Storage variants, and deprecate the MiniMagick backend.

  This means that variants are now automatically oriented if the original image was rotated. Also, in addition to the existing ImageMagick operations, variants can now use :resize_to_fit, :resize_to_fill, and other ImageProcessing macros. These are now recommended over raw :resize, as they also sharpen the thumbnail after resizing.

  The ImageProcessing gem also comes with a backend implemented on libvips, an alternative to ImageMagick which has significantly better performance than ImageMagick in most cases, both in terms of speed and memory usage. In Active Storage it's now possible to switch to the libvips backend by changing Rails.application.config.active_storage.variant_processor to :vips.

  Janko Marohnić

• Rails 6 requires Ruby 2.4.1 or newer.

  Jeremy Daer

Please check 5-2-stable for previous changes.