Are you talking about wlr-randr? Because its –transform argument only accepts normal|90|180|270|flipped|flipped-90|flipped-180|flipped-270, not any transformation matrix. Maybe its just a limitation of the command line tool and it could be modified, I don’t know, I haven’t been too deep in the code or the protocol specifications. It also looks like it only works with wlroots based compositor.
Could 2024 be the year of the diagonal linux desktop? (www.tomshardware.com)
Thanks to @redcalcium for providing a better link. This post originally linked to tomshardware.