Nice! I have a project of my own [1] in a similar vein although not as low level as yours. Using an RPi3 with the official TFT LCD and touchscreen and rendering

Nice! I have a project of my own [1] in a similar vein although not as low level as yours. Using an RPi3 with the official TFT LCD and touchscreen and rendering graphics via OpenVG. Getting about 45fps (~22ms per frame) on the Pi itself to render an 800x480 UI filled with some round-rect buttons, rotary dials, and text. Rolled my own very basic UI controls library and cross-platform host isolation library [2] to achieve this. Tested and working on darwin, win64, and raspberry pi 3. [1] https://github.com/JamesDunne/axewitcher-ovg https://github.com/JamesDunne/axewitcher-ovg [2] https://github.com/JamesDunne/golang-openvg https://github.com/JamesDunne/golang-openvg