Writing an OS Kernel from Scratch – Part 32: Integrating LVGL — Text Editor with Open Source GUI Framework
“Building wheels from scratch is fun, but industrial-grade GUI needs mature frameworks. Today, we port LVGL (Light and Versatile Graphics Library) to our OS, implementing a professional text editor!”
In previous posts, we built from scratch:
✅ Framebuffer driver
✅ Window manager
✅ Bitmap text rendering
✅ Paint tool
But writing GUI controls (buttons, input boxes, scrollbars) by hand is extremely time-consuming. Real application development needs a mature GUI framework — LVGL is a lightweight open-source GUI library designed for embedded systems!
Today, we:
✅ Port LVGL to our OS
✅ Implement Display Driver and Input Driver
✅ Develop an LVGL text editor
✅ Integrate into the window manager
Why LVGL?
| Feature | Description |
|---|---|
| Lightweight | Only 64KB Flash + 10KB RAM |
| Open source | MIT license |
| Feature-rich | Buttons, sliders, text boxes, lists, charts… |
| Hardware abstraction | Adapt to any platform via Display/Input Driver |
| Active community | GitHub 15k+ stars |
LVGL is used in smart home devices, medical equipment, car dashboards, and more!
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