Steps to reproduce

1. Configure focalpoint generator so the format name is webp (use attached configuration)
2. Request a jpg file: http://localhost:8080/magnolia-webapp/.imaging/focalpoint/426x240/dam/jcr:ab2c4750-f59a-4b45-87f3-ec27de99d1a5/kitchen.jpg
3. Change the file extension to webp: http://localhost:8080/magnolia-webapp/.imaging/focalpoint/426x240/dam/jcr:ab2c4750-f59a-4b45-87f3-ec27de99d1a5/kitchen.webp

Expected results

The returned file is webp format as configured.

Actual results

The returned file format is the same than the requested file (.jpg) in steps 2 and 3 regardless the extension.

Development notes

info.magnolia.dam.focal.imaging.DamFocalOperationChain<P> is calling info.magnolia.dam.focal.imaging.AbstractDamFocalParameter.getFormatName(), which is only considering the format of the jcr:content node instead of the output format configuration.