@dankcushions said in RetroArch Mirror Mode:
is an ES issue? presumably once you've loaded the game, it's now a game issue. there doesn't seem much point in fixing it in ES if there's no a solution for the games as well. never mind if you load the command prompt/retropie-setup menu...
With HDMI, you can flip the screen horizontally (and I think vertically), to give an image of everything that will look the right-way around when viewed in a mirror.
With component/SCART output suitable for a CRT TV, you can use a RetroArch shader to get the image flipped and rotated so it works perfectly in a mirror too (see this forum post). This is good, but obviously, all the menus, the screensaver (easier to fix) and general RetroPie/ES menus are the wrong way around. It would be very nice to find a fix for that last piece of the puzzle.