I try to migrate the lv_meter widget, because i use it a lot and it is a good learning exercise.
Most items I can resolve but lv_draw_mask_add seems to be removed in v9.1 but there is no information I can find on a replacement or if it is not needed any more.
What LVGL version are you using?
v8.3 ==> v9.1
What do you want to achieve?
port lv_meter
The code block(s) should be formatted like:
lv_draw_sw_mask_radius_init(&outer_mask, &area_outer, LV_RADIUS_CIRCLE, false);
int16_t outer_mask_id = lv_draw_mask_add(&outer_mask, NULL);
Screenshot and/or video
If possible, add screenshots and/or videos about the current state.