LVGL provides a free online tool at lvgl.io/tools/fontconverter . Here’s the step-by-step:
| Pitfall | Proper Fix | |---------|-------------| | Wrong glyph order | Must match the order of codepoints in the VLW table | | Missing control point flattening | Recursively subdivide quadratic splines until chord deviation < 0.5 px | | Negative y‑coordinates | VLW stores points relative to baseline (y=0 is baseline, positive up) | | Overlapping contours (holes) | Use non‑zero winding rule; store contours in correct order | | Integer overflow | Use int32 , clamp to ±32767 (VLW's point limit per glyph) | ttf to vlw converter
: Because VLW files are image-based, they must be created at the specific size (e.g., 32pt) they will be displayed at to maintain visual clarity. LVGL provides a free online tool at lvgl