v8.2.0 is released

Written by kisvegabor on January 31, 2022

Overview

Among many fixes and minor updates these are the most important features in v8.2.0:

Abstract render layer to make it easier to attack external draw engines
Add LV_FLAD_OVERFLOW_VISIBLE. If enabled the children of an object won’t be clipped to the boundary of the object
Add ffmpeg decoder support to play videos and open a wide variety of image formats
Add font fallback support
Add gradient dithering support
Add “monkey test”
Add cmsis-pack support
Add Grid navigation (lv_gridnav)

The GPU support for NXP microcontrollers is still not updated to the new draw architecture. See #3052

Breaking Changes

:warning: feat(fs): add caching option for lv_fs-read 2979
:warning: feat(span): lv_spangroup_get_expand_width() adds a parameter 2968
:warning: arch(draw): allow replacing the draw engine db53ea9

Architectural

arch(draw): separate SW renderer to allow replacing it 2803
arch: merge lv_demos 5414652
arch(sdl): migrated to use new backend architecture 2840
arch(env): move rt-thread into env_support folder 3025
arch(env): arch(env): move the cmake folder into the env_support folder 773d50f
arch(env): move the zephyr folder into the env_support folder 4bd1e7e

New Features

feat(cmsis-pack): prepare for lvgl v8.2.0 release 3062
feat(gridnav): add lv_gridnav 2911
feat: update the cmsis-pack to 0.8.3 3021
feat(sdl): support rounded images 3012
feat(cmsis-pack): add cmsis-pack support 2993
feat(event): add preprocessing and stop bubbling features for events 3003
feat(draw): add gradient dithering support 2872
feat(symbols): add guards to LV_SYMBOL_* to allow redefining them 2973
feat(obj): subdivide LV_OBJ_FLAG_SCROLL_CHAIN into …CHAIN_HOR and …CHAIN_VER 2961
feat(draw): add draw_bg callback to draw_ctx #2934 2935
feat(docs): add Chinese readme 2919
feat(txt): add used_width parameter to _lv_txt_get_next_line() 2898
feat(others) add monkey test 2885
feat(rlottie): add animation control options 2857
feat(lv_hal_indev): add missing lv_indev_delete() 2854
feat(freetype): optimize memory allocation 2849
feat(Kconfig): add FreeType config 2846
feat(widgets): add menu widget 2603
feat(refr): add reset function for FPS statistics 2832
feat(Kconfig): add monitor position configuration 2834
feat(examples) add micropython versions of the external library examples 2762
feat(freetype): support bold and italic 2824
feat(font) add fallback support and mem. font load option to FreeType 2796
feat(lib) add ffmpeg video and image decoder 2805
feat(obj): add LV_OBJ_FLAG_OVERFLOW_VISIBLE e7ac0e4
feat(scrollbar): add more control over scrollbar paddings 4197b2f
feat(dropdown): keep the list on open/close for simpler styling 9d3134b
feat(qrcode) use destructor instead of lv_qrcode_delete() 318edd8
feat(disp) allow decouplig the disp_refr timer 85cc84a
feat(obj): add lv_obj_get_event_user_data() 53ececc
feat(obj) add LV_OBJ_FLAG_SCROLL_WITH_ARROW 70327bd
feat(slider): consider ext_click_area on the knob with LV_OBJ_FLAG_ADV_HITTEST 9d3fb41

Performance

perf(sdl): optimize the use of SDL_RenderSetClipRect 2941
perf(color): add faster lv_color_hex function 2864

Fixes

fix(micropython) update examples for new API 3059
fix: increase default value of LV_MEM_SIZE for lv_demo_widgets #3057 3058
fix(cmsis-pack): fix issue #3032 3056
fix(porting): add missing function prototypes 3054
fix(kconfig): add missing default values 3050
fix(canvas): force canvas to use sw draw 3045
fix(rt-thread): use ARCH_CPU_BIG_ENDIAN to replace RT_USING_BIG_ENDIAN 3044
fix(gradient): general cleanup and fix for alignment issues 3036
fix(draw): rendering issues for vertical gradient with and without dithering 3034
fix uninitialized variable 3033
fix(lru): lower dependency for standard C functions 3024
fix(env_support): move cmsis-pack to env_support folder 3026
fix(doc): full covering opacity is 255, not 256 3022
fix uninitialized variables 3023
fix various issues for esp32 3007
fix(sdl): fix clipped image drawing 2992
fix(draw): missed bg_color renaming in the draw function 3002
fix(porting): fix typo and an unmatched prototype 2998
fix(conf) add missing LV_LOG_LEVEL default definition 2996
fix(refr): crash if full_refresh = 1 2999
fix(Kconfig): adapt to lvgl’s built-in demos 2989
fix(Makefile): compilation errors 2944
fix(rlottie): fix variable name 2971
fix(group): in lv_group_del() remove group from indev (lvgl#2963) 2964
fix(obj): old parent’s scroll is not updated in lv_obj_set_parent() 2965
fix(fatfs) add missing cast 2969
fix(snapshot) fix memory leak 2970
fix(examples) move event callback registration outside loop in lv_example_event_3 2959
fix(canvas): off by one error in size check in lv_canvas_copy_buf 2950
fix(indev) add braces to avoid compiler warning 2947
fix: fix parameter order in function prototypes 2929
fix(style):add const qualifier for lv_style_get_prop() 2933
fix(dropdown): in lv_dropdpwn_get_selected_str handle if there are no options 2925
fix: lv_deinit/lv_init crash or hang 2910
fix(rt-thread): improve the structure 2912
fix: removed string format warnings for int32_t and uint32_t 2924
fix(lv_fs_win32): add missing include of <stdio.h> 2918
fix: use unsigned integer literal for bit shifing. 2888
chore(lottie) move rlottie_capi.h to lv_rlottie.c 2902
fix(qrcodegen) add brackets around assert calls 2897
fix(list) guard image creation with LV_USE_IMG 2881
fix(snapshot): make fake display size big enough to avoid align issue. 2883
fix(sdl) correct makefile 2884
fix(draw): fix set_px_cb memory write overflow crash. 2882
fix(freetype): fix memset error 2877
fix(span): fix align and break word 2861
fix(refr): swap buffers only on the last area with direct mode 2867
fix(arc) free memory when drawing full-circle arc 2869
fix(indev): update lv_indev_drv_update to free the read_timer 2850
fix(draw): fix memory access out of bounds when using blend subtract 2860
fix(chart) add lv_chart_refresh() to the functions which modify the data 2841
fix(conf) mismatched macro judgment 2843
fix(ffmpeg): when disabled LV_FFMPEG_AV_DUMP_FORMAT makes av_log quiet 2838
fix(rt-thread): fix a bug of log 2811
fix(log): to allow printf and custom_print_cb to work at same time 2837
fix(keyboard): add missing functions 2835
fix(checkbox) remove unnecessary events 2829
fix(qrcode): replace memcpy() with lv_memcpy() and delete useless macros 2827
fix(font) improve builtin font source files generation process 2825
fix(CMake) split CMakeLists.txt, add options, includes and dependencies 2753
fix(obj): make lv_obj_fade_in/out use the current opa as start value 2819
fix(qrcode):minimize margins as much as possible 2804
fix(scripts): switch all scripts to python3 2820
fix(event): event_send_core crash in special case. 2807
fix(Kconfig) remove duplicate LV_BUILD_EXAMPLES configuration 2813
fix(obj): in obj event use the current target instead of target 2785
fix(draw_label): radius Mask doesn’t work in Specific condition 2784
fix(draw_mask): will crash if get_width/height < 0 2793
fix(theme) make the basic theme really basic a369f18
fix(arc): fix knob invalidation 345f688
fix(theme): add arc, spinner and colorwheel to basic theme adc218a
fix(conf) define LV_LOG_TRACE_… to 0 in lv_conf_internal.h to avoid warnings 305284c
fix(draw): consider opa and clip corner on bg_img d51aea4
fix(draw): add grad_cache_mem to GC_ROOTs 138db9c
fix(bar, slider): fix shadow drawing on short indicators 364ca3c
fix(theme): fix theme initialization issue introduced in 6e0072479 d231644
fix(draw): add lv_draw_sw_bg 49642d3
fix(draw) border_draw crash is special case 075831a
fix(theme): fix crash in lv_theme_basic_init ca5f04c
fix(draw): fix indexed image drawing 5a0dbcc
fix(roller): clip overflowing text 5709528
fix(align) fix LV_SIZE_CONTENT size calculation with not LEFT or TOP alignment 9c67642
fix(draw): futher bg_img draw fixes 81bfb76
fix(btnmatrix): keep the selected button even on release d47cd1d
fix(sw): make knob size calculation more intuitive 5ec532d
fix(switch): make knob height calculation similar to slider 0921dfc
fix(span): explicitly set span->txt to the return value of lv_mem_realloc(#3005) a9a6cb8
fix(example): update LVGL_Arduino.ino d79283c
fix(draw) simplify how outline_pad is compnesated 81d8be1
fix(obj) make LV_OBJ_FLAG_SCROLL_CHAIN part of the enum instead of define f8d8856
fix(label): dot not add dots if the label height > 1 font line height 4d61f38
fix(event): crash if an object was deleted in an event 9810920
fix(build) fix sdl build with make 43729d1
fix(config): fix anonymus choice 71c739c
chore(docs): fix lv_list_add_text a5fbf22
fix(png) check png magic number to be sure it’s a png image 1092550
fix(btnmatrix): fix crash if an empty btnmatrix is pressed 2392f58
fix(mem/perf monitor): fix issue introduced in #2910 0788d91
fix(layout) fix layout recalculation trigger in lv_obj_add/clear_fleg ee65410
fix(obj) fix lv_obj_fade_in 4931384
fix(draw): fix clipping children to parent 5c98ac8
fix: remove symlinks to be accepted as an Ardunio library 6701d36
chore: fix typos in FATFS config 74091c4
fix(refr): fix missed buffer switch in double full-screen buffer + direct_mode 731ef5a
chore(qrcode): fix warnings e9d7080
docs(event): tell to not adjust widgets in draw events 933d67f
fix(table, chart): fix memory leaks 8d52de1
fix(event): handle object deletion in indev->fedback_cb bfc8edf
fix(roller): snap on press lost fa9340c
fix(dropdown) be sure the list is the top object on the screen cb7fc2b
fix(img) fix invalidation issue on transformations d5ede0e
fix(obj) fix comments of lv_obj_set_pos/x/y b9a5078

Examples

example: add non-null judgment to lv_example_obj_2 2799
example(table): fix text alignment b03dc9c

Docs

docs(demos) update information to reflect new layout 3029
docs(porting): remove duplicated content 2984
docs(display) fix typo 2946
docs(get-started) add introduction for Tasmota and Berry 2874
docs fix spelling, parameter descriptions, comments, etc 2865
docs: spelling fixes 2828
docs(style) minor style fix 2818
docs(porting/display) fix formatting 2812
docs(roadmap) udpate 084439e
docs(widgets) fix edit links 7ed1a56
docs(contributing) update commit message format 1cd851f
docs(porting): add more details about adding lvgl to your project 6ce7348
docs(indev): add description about gestures 2719862
docs(style): describe const styles 28ffae8
docs(faq): add “LVGL doesn’t start, nothing is drawn on the display” section 0388d92
docs add demos 02a6614
docs(fs): update fs interface description to the latest API 285e6b3
docs(format) let wrap 4bf49a8
docs(imgbtn) fix typo d792c5f
docs(porting) clarify that displays must be registered before input devices 1c64b78
docs(event) fix lv_event_get_original_target vs lv_event_get_current_target cdd5128
docs(events) rename LV_EVENT_APPLY to LV_EVENT_READY (#2791) bf6837f
docs(gpu): link style properties and boxing model 6266851
docs(gesture): clarify gesture triggering with scrolling e3b43ee
docs(contributing): remove the mentioning of the dev branch 00d4ef3
docs(bar) fix default range eeee48b
docs(event): tell to not adjust widgets in draw events 933d67f
docs(switch) improve wording b4986ab
docs(font) fix example to match v8 2f80896

CI and tests

test(bar): add unit tests 2845
test(switch): add initial unit test 2794
test(demo) add tests for widget and stress demos 3bd6ad8
test(dropdown) fix to pass again 918b3de
test add support for using system heap 446b1eb
ci remove formatting request workflow 6de89e4
ci initial support for cross-architecture tests 7008770
ci create handler for formatting requests 7af7849
test(style) add test for gradient da8f345
test(event) add test for #2886 51ef9c2
ci add workflow to check code formatting a2b555e
ci attempt to speed up cross tests 80408f7
ci apply my updates to the verify-formatting action 02f02fa
ci: add arduino linter action f79b00c
ci update action be9722c
ci more formatting action updates 1f6037c
ci disable LeakSanitizer on dockerized tests c9e1927
ci one last try at this for tonight dddafae
ci try alternate checkout mechanism cb3de30
test(style) fix compile error ba083df
test(template) simplify _test_template.c b279f63
ci force ccache to be saved every time a7c590f
ci switch to codecov v2 6b84155
ci more debugging for formatting action 2f8e4bc
ci inline apt-get commands 90e2b9f
ci(micropython) use ESP-IDF 4.4 b34fe9e
ci add 5k stack limit 4122dda
ci force use of ccache in PATH 6de3fa8
ci add back stack usage check at 4 kilobytes 89135d6
ci temporarily disable stack usage check 1900c21
ci(cross) use python3 instead of python df7eaa0
ci use specific version tag 59b4769
ci fix check style action 5bb3686
ci fix typo in formatting action d1ccbf6
ci test formatting action 065d821
ci(micropython) switch to newer GCC action 1fa7257
ci(style) force color on diff to help highlight whitespace changes 04f47ea
ci(cross) install build-essential 772f219
ci force pushing to upstream branch 8277f78
ci ensure lvgl-bot is used to make commits 9fcf52a

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