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lua + lvgl = luavgl An optimized lvgl Lua binding

License: MIT License

C 88.67% Lua 9.97% CMake 1.36%

lua lvgl binding gui embbeded littlevgl nuttx luavgl

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hmadao linzeb906791229 j005u niurenyige szp35 paco9527 dgwynne lightenpan shb3618

luavgl's Issues

ToDos

obj:anim rework to use uservalue table instead of C arrays.
obj:anim add done_cb support, so application knows when anim is done.
use pcall instead of call in obj event, like luv
unified set/get methods
auto code generation for widget
add documentation for newly added functions

I'm trying to get this to build and run on Win-10 using MSVC /clang-cl. But have nothing but troubles.
But first off, the example on the main page does not even parse with my Lua 5.4: lua.exe test.lua:

lua.exe: test.lua:13: '}' expected (to close '{' at line 8) near 'pad_all'

It should read:

    bg_color = "#112233", -- #RRGGBB, 0xRRGGBB or "#RGB"
    pad_all = 0
}

and not bg_color = "#112233", -- #RRGGBB, 0xRRGGBB or "#RGB",

But then after adding a require "lvgl" at the top, a lua.exe test.lua crashes good inside lv_mem.c. Call-stack:

lvgl!search_suitable_block(struct control_t * control = 0x00000000`00000000, int * fli = 0x000000cc`dedeea20, int * sli = 0x000000cc`dedeea24)+0x40
lvgl!block_locate_free(struct control_t * control = 0x00000000`00000000, unsigned int64 size = 0x38)+0x5e
lvgl!lv_tlsf_malloc(void * tlsf = 0x00000000`00000000, unsigned int64 size = 0x38)+0x3b
lvgl!lv_mem_alloc(unsigned int64 size = 0x38)+0x55
lvgl!lv_obj_class_create_obj(struct _lv_obj_class_t * class_p = 0x00007ffa`d8145098, struct _lv_obj_t * parent = 0x00000000`00000000)+0x2d
lvgl!lv_obj_create(struct _lv_obj_t * parent = 0x00000000`00000000)+0x44
lvgl!luaopen_lvgl(struct lua_State * L = 0x000001ef`00157658)+0x131
lua54_x64!luaD_precall(struct lua_State * L = 0x000001ef`00157658, union StackValue * func = 0x000001ef`00157d80, int nresults = 0n1)+0x22c
lua54_x64!ccall(struct lua_State * L = 0x000001ef`00157658, union StackValue * func = 0x000001ef`00157d80, int nResults = 0n1, int inc = 0n65537)+0x4c
lua54_x64!lua_callk(struct lua_State * L = 0x000001ef`00157658, int nargs = <Value unavailable error>, int nresults = 0n1, int64 ctx = <Value unavailable error>, <function> * k = 0x00000000`00000000)+0x5f
lua54_x64!ll_require(struct lua_State * L = 0x000001ef`00157658)+0x1fc
lua54_x64!luaD_precall(struct lua_State * L = 0x000001ef`00157658, union StackValue * func = 0x000001ef`00157d20, int nresults = 0n0)+0x22c
lua54_x64!luaV_execute(struct lua_State * L = 0x000001ef`00157658, struct CallInfo * ci = 0x000001ef`0017c230)+0x29e4
lua54_x64!ccall(struct lua_State * L = 0x000001ef`00157658, union StackValue * func = 0x000001ef`00157d00, int nResults = 0n-1, int inc = 0n65537)+0x65
lua54_x64!luaD_rawrunprotected(struct lua_State * L = 0x000001ef`00157658, <function> * f = 0x00007ffb`1eeb60c0, void * ud = 0x000000cc`dedef5a0)+0x73
lua54_x64!luaD_pcall(struct lua_State * L = 0x000001ef`00157658, <function> * func = <Value unavailable error>, void * u = <Value unavailable error>, int64 old_top = 0n80, int64 ef = 0n64)+0x40
lua54_x64!lua_pcallk(struct lua_State * L = 0x000001ef`00157658, int nargs = <Value unavailable error>, int nresults = 0n-1, int errfunc = <Value unavailable error>, int64 ctx = 0n0, <function> * k = 0x00000000`00000000)+0x10d
lua!docall(struct lua_State * L = 0x000001ef`00157658, int narg = 0n0, int nres = 0n-1)+0x7c
lua!handle_script(void)+0xfe
lua!pmain(struct lua_State * L = 0x000001ef`00157658)+0x589
lua54_x64!luaD_precall(struct lua_State * L = 0x000001ef`00157658, union StackValue * func = 0x000001ef`00157cc0, int nresults = 0n1)+0x22c
lua54_x64!ccall(struct lua_State * L = 0x000001ef`00157658, union StackValue * func = 0x000001ef`00157cc0, int nResults = 0n1, int inc = 0n65537)+0x4c
lua54_x64!luaD_rawrunprotected(struct lua_State * L = 0x000001ef`00157658, <function> * f = 0x00007ffb`1eeb60c0, void * ud = 0x000000cc`dedef8f0)+0x73
lua54_x64!luaD_pcall(struct lua_State * L = 0x000001ef`00157658, <function> * func = <Value unavailable error>, void * u = <Value unavailable error>, int64 old_top = 0n16, int64 ef = 0n0)+0x40
lua54_x64!lua_pcallk(struct lua_State * L = 0x000001ef`00157658, int nargs = <Value unavailable error>, int nresults = 0n1, int errfunc = <Value unavailable error>, int64 ctx = 0n0, <function> * k = 0x00000000`00000000)+0x10d
lua!main(int argc = <Value unavailable error>, char ** argv = 0x000001ef`00178130)+0xec
lua!invoke_main(void)+0x22
lua!__scrt_common_main_seh(void)+0x10c
KERNEL32!BaseThreadInitThunk+0x14
ntdll!RtlUserThreadStart+0x21

presumably since lv_mem_init() was not called for LV_MEM_CUSTOM == 0.

So I really have no idea how to use this library. Seems not very robust.

And BTW, why is not LuaJIT supported? Much faster AFAICS.
And it does not build with LVGL from master. Why not?

add more documents

Hello Xu,

Thanks for your great work.

Can you add more information about how to prepare the lvgl environment ?

I remember that the luavgl library should be a dynamic library (.so file). so lua can find it when local lvgl = require("lvgl").
It it right ?

Simulator with luajit crash when click animation example

Crash only happen with luajit but not lua.

Another crash may be related with following reproduce steps:

1. click test, then indev
1. click button reload

AddressSanitizer:DEADLYSIGNAL
=================================================================
==1680078==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x5644a0de7ee6 bp 0x7ffe84f88d30 sp 0x7ffe84f88d10 T0)
==1680078==The signal is caused by a READ memory access.
==1680078==Hint: address points to the zero page.
    #0 0x5644a0de7ee5 in luavgl_indev_gc ../src/indev.c:278
    #1 0x7fdeb4679fb6  (/lib/x86_64-linux-gnu/libluajit-5.1.so.2+0x8fb6)
    #2 0x7fdeb4686f59  (/lib/x86_64-linux-gnu/libluajit-5.1.so.2+0x15f59)
    #3 0x7fdeb46a7105  (/lib/x86_64-linux-gnu/libluajit-5.1.so.2+0x36105)
    #4 0x7fdeb46a7267  (/lib/x86_64-linux-gnu/libluajit-5.1.so.2+0x36267)
    #5 0x7fdeb467a325  (/lib/x86_64-linux-gnu/libluajit-5.1.so.2+0x9325)
    #6 0x7fdeb46c8bed in lua_close (/lib/x86_64-linux-gnu/libluajit-5.1.so.2+0x57bed)
    #7 0x5644a0dd2dfc in lua_terminate ../simulator/main.c:290
    #8 0x5644a0dd2e3a in reload_cb ../simulator/main.c:302
    #9 0x5644a0df80fa in event_send_core ../deps/lvgl/src/core/lv_event.c:467
    #10 0x5644a0df4f0c in lv_event_send ../deps/lvgl/src/core/lv_event.c:75
    #11 0x5644a0e011c8 in indev_proc_release ../deps/lvgl/src/core/lv_indev.c:980
    #12 0x5644a0dfd32d in indev_pointer_proc ../deps/lvgl/src/core/lv_indev.c:384
    #13 0x5644a0dfadbd in lv_indev_read_timer_cb ../deps/lvgl/src/core/lv_indev.c:101
    #14 0x5644a0ec0e46 in lv_timer_exec ../deps/lvgl/src/misc/lv_timer.c:313
    #15 0x5644a0ec05b4 in lv_timer_handler ../deps/lvgl/src/misc/lv_timer.c:109
    #16 0x5644a0dd2f43 in main ../simulator/main.c:335
    #17 0x7fdeb4443082 in __libc_start_main ../csu/libc-start.c:308
    #18 0x5644a0dcd58d in _start (/home/neo/projects/luavgl/build/simulator/simulator+0x4d58d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV ../src/indev.c:278 in luavgl_indev_gc
==1680078==ABORTING

I want to use Lua in lvgl vs

There were many errors in vs
Lua lvgl doesn't seem to be a standard C language

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