LittlevGL and round displays

General discussion
1

Dear All

Please advice me is is possible use LittlevGL library with round displays.

e.g. https://www.aliexpress.com/item/1732744454.html
driver ST7687S

or https://www.aliexpress.com/item/32919257838.html?spm=a2g0o.detail.1000023.3.7f05239cAaQGMq

driver ST7789V

or any other…
if is it possible in general.

thank you

2

Assuming that internally the round display uses a square block of memory to store pixels, there shouldn’t be any reason for it not to work.

3

I am beginner in displays…

you meant that can I probram round display like standard a x b size displays?

4

I’m no expert with rounded displays, but I think so. Usually, from what I’ve read, the extra corner parts are stored in memory but never displayed.

5

It depends on how the display works but as I saw so far they are usually considered rectangular. So the outer parts are just dropped.

Interesting note:
STM’s Chrom-GRC is a periphery to optimize non-rectangular displays’ memory usage. Here are more details. I haven’t tried yet though.
If I understood well it stores only the visible parts but when sending the data to the display it completes shorter lines to get a rectangular image in the end.