LVGL v8.3.11 Released

LVGL v8.3.11 is now available with several new features and important bug fixes. This release backports Tiny TTF font support from LVGL 9, adds LittleFS filesystem integration, and enhances table widgets with user data capabilities.

New Features #

Tiny TTF Font Support #

Tiny TTF has been backported to LVGL 8, enabling TrueType font rendering with a lightweight footprint. This feature allows you to load .ttf files directly without pre-converting them to bitmap fonts.

Pull Request: #4727

LittleFS Filesystem Driver #

A new LittleFS driver (lv_fs_littlefs) is now available as an official filesystem backend. LittleFS is designed for microcontrollers with limited resources and provides power-loss resilience.

Pull Request: #4677

Table Cell User Data #

Table cells can now store custom user data via new API functions. This makes it easier to associate application-specific information with individual cells.

Pull Requests: #4767, #4769

Bug Fixes #

This release includes numerous bug fixes across widgets and drawing systems:

Table: Fixed abnormal string output in lv_table_set_cell_value_fmt (#4804)
Dropdown: Avoided partial match issues in lv_dropdown_get_option_index (#4598)
Dropdown: Fixed character index overflow (#4589)
Arc: Improved click handling outside background angle range (#4667)
Arc: Fixed value setting by click (20b6199)
Button Matrix: Set LV_BTNMATRIX_BTN_NONE when clicking disabled buttons (#4578)
Keyboard: Added missing '&' character (d20bd1c)
Meter: Fixed minor display issues (#4657)

Core Fixes #

Objects: Readjust scroll after layout when child is removed (#4921)
Display: Fixed infinite recursive SCREEN_LOADED events (ef76206)
Display: Fixed lv_scr_load_anim being called twice quickly (#4629)

Drawing Fixes #

Transform: Fixed compiler error in lv_draw_sw_transform.c (#4612)
Rectangle: Fixed scaling rectangle parts with opacity (7a8fcbf)
Letter Rendering: Fixed warning in lv_draw_sw_letter.c (d22cda3)
Needle Drawing: Changed needle line draw start point from scale center (#4682)