App:Library:LVGL:docs:Changelog

https://docs.lvgl.io/8.2/CHANGELOG.html

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Changelog

v8.2.0 31 January 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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