[Feature request] Reverse rotation

[parkerlreed]

stdin for example has --portrait but nothing for flipping the display upside down.

I can do this with image using --rotate 270

[joukos]

Yeah, there's some inconsistency there currently (and stdin hasn't been touched for a long time). The orientation settings should be part of the driver's features instead of having varying options for the subcommands. Doing it (in a simple, not necessarily the best way) should be fairly easy, but cleaning up afterwards and testing that nothing breaks might take a while longer. I don't know when I'll have the time for it.