An introduction to the UIX embedded UI library: A clock for the M5 Stack Core2
Briefly

UIX, a draw-on-demand framework, is simpler and more memory conservative than LVGL, supporting features like SVG and Truetype. It is built on the GFX graphics library by the author.
UIX creates screens and controls for layout, handling control redraws and updates efficiently. It supports touch feedback and works similarly to LVGL, despite not directly deriving from it.
Read at CodeProject
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