Image skew in Countour

[Lestropie]

Madly went looking for a sixel-compatible terminal emulator in order to be able to show this off. Landed on Contour. Works, however results in the image below. Maybe there's something internal to do with setting of pixel pitch that isn't working here, such that square grid elements are coming out with the same aspect ratio as the terminal characters?

[jdtournier]

I doubt it, given that sixel technology dates back to dot matrix printers... But it's possible, we'd need to check the docs. Won't be all that easy to support as it would presumably involve a query, which is a potentially asynchronous round trip to the terminal. I think there are other features where we already need to do that though, so maybe it wouldn't too tricky to deal with - not sure...