You can combine any number of ImageMagick/libvips operations into a variant, as well as any macros provided by the ImageProcessing gem (such as resize_to_limit): avatar. Then it'll upload said variant to the service according to a derivative key of the blob and the transformations. This will create and process a variant of the avatar blob that's constrained to a height and width of 100. Example: avatar.variant(resize_to_limit: ).rvice_url Otherwise it will perform the transformations, upload the variant to the service, and return itself again. This will check that the variant has already been processed and uploaded to the service, and, if so, just return that. When you do want to actually produce the variant needed, call processed. requirements for the current main branch on the Download TYPO3 page. This will create a URL for that specific blob with that specific variant, which the ActiveStorage::RepresentationsController can then produce on-demand. Ruby interpreter The required Ruby versions for a given Redmine version are: 1 Support of Ruby 2.6 and earlier has been ended by the Ruby community. ImageMagick has extensive documentation, although the site is short on examples or showing results, and I think the best way to learn is by experimenting and changing various settings and options. To refer to such a delayed on-demand variant, simply link to the variant through the resolved route provided by Active Storage like so: Requirements Operating system Redmine should run on most Unix, Linux, macOS and Windows systems as long as Ruby is available on this platform. There is a lot more to learn about ImageMagick, so I plan to write more about it, maybe even about using Perl to script ImageMagick commands. Delay the processing to an on-demand controller, like the one provided in ActiveStorage::RepresentationsController. You shouldn't be processing variants inline in a template, for example. Because of this process, you also want to be considerate about when the variant is actually processed. Note that to create a variant it's necessary to download the entire blob file from the service. By default, images will be processed with ImageMagick using the MiniMagick gem, but you can also switch to the libvips processor operated by the ruby-vips gem). This includes the command-line utilities, as well as the C and C++ APIs. Variants rely on ImageProcessing gem for the actual transformations of the file, so you must add gem "image_processing" to your Gemfile if you wish to use variants. command to determine current configuration Questions and postings pertaining to the usage of ImageMagick regardless of the interface. The direction you choose specifies where to position text or subimages. Use -list gravity to get a complete list of -gravity settings available in your ImageMagick installation. Choices include: NorthWest, North, NorthEast, West, Center, East, SouthWest, South, SouthEast. These variants are used to create thumbnails, fixed-size avatars, or any other derivative image from the original. Sets the current gravity suggestion for various other settings and options. Image blobs can have variants that are the result of a set of transformations applied to the original.
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