Slint already supports rendering just the dirty regions of the screen. SPI is a major performance handicap though — they could use PIO on the RP2040 to implemen

Slint already supports rendering just the dirty regions of the screen. SPI is a major performance handicap though — they could use PIO on the RP2040 to implement an 8 or 16 bit parallel bus (and then they’d need a display with support for parallel IO), and that would help a ton. Here’s Slint running on my own backend for the Teensy MicroMod (has an NXP i.MX RT1062 processor) using DMA and an 8-bit parallel bus using FlexIO: https://twitter.com/charlesstrahan/status/1630026224356474881?s=46&t=lBzQAONe_HQsqCFP-ngNIQ https://twitter.com/charlesstrahan/status/163002622435647488... I’d say that’s fairly smooth.