Skip to content

Lua functions

Jump to bottom
Piotr Halama edited this page Aug 14, 2025 · 21 revisions

Table of libraries and their function All functions are called as library.fucntionName() from Lua, except the bace ones (error, next, etc.)

Standard Lua libraries: str is something like a const char*

base functions & libraries

  • base functions - some functions were cut, e.g. require()
    • error()
    • getmetatable()
    • setmetatable()
    • getfenv()
    • setfenv()
    • next()
    • ipairs()
    • pairs()
    • print()
    • toint()
    • tostring()
    • type()
    • assert()
    • unpack()
    • rawequal()
    • rawget()
    • rawset()
    • pcall()
    • xpcall()
    • collectgarbage()
    • gcinfo()
    • loadstring()
    • missing function - require()
  • coroutine - loaded as a part of base
    • create()
    • wrap()
    • resume()
    • yield()
    • status()
  • table
    • concat()
    • foreach()
    • foreachi()
    • getn()
    • setn()
    • sort()
    • insert()
    • remove()
  • string
    • len()
    • sub()
    • lower()
    • upper()
    • char()
    • rep()
    • byte()
    • format()
    • dump()
    • find()
    • gfind()
    • gsub()
  • debug
    • gsub()
    • getlocal()
    • getinfo()
    • gethook()
    • getupvalue()
    • sethook()
    • setlocal()
    • setupvalue()
    • debug()
    • traceback()

Non-standard libraries:

  • gl
    • SelectOSDMode(str mode)
      • possible modes: 844, 655, 4444, 4633
    • BeginScene()
    • EndScene()
    • int CreateOverlayFromTexture(int i)
    • FreeOverlay(int i)
    • int LoadTexture(int i, str s)
    • FreeTexture(int i)
    • AddTextureToOverlay(int i, int j)
    • RemoveTextureFromOverlay(int i, int j)
    • SetTextureActiveFrame(int i, int j)
    • SetClipInfo(int i, int j, int k, int l, int m)
    • SetParameters(int i, int j, int k, int l, int m)
      • identical to the SetClipInfo()
    • SetZorder(int i, int j)
    • SetVisibility(int i, int j)
    • SetPosition(int i, int j, int k)
    • int GetZorder(int i)
    • int GetVisibility(int i)
    • int, int GetPosition(int i)
    • int, int GetSize(int i)
    • ClearOSD()
    • Show(int i)
    • int HasAnimations(int i)
    • DeleteAllAnimations(int i)
    • AddPositionAnimation(int i, int j, int k, int l, int m, int n, int o)
    • AddVisibilityAnimation(int i, int j, int k)
    • AddParabolaAnimation(int i, int j, int k, int l, int m, int n, int o, int p, int q, int r, int s, int t)
    • AddBlinkingAnimation(int i, int j, int k, int l, int m)
    • AddAlphaAnimation(int i, int j, int k, int l)
    • CreateTextureAnimation(int i, int j, int [][]t)
      • TODO tables, I don't know if I read this correctly
      • expects a table of 11 tables of 3 ints, int [11][3]
    • int CreateEmptyTexture(int i, int j, str s)
    • BlitOverlay(int i, int j, int k, int l)
      • with optional int m and int n
    • BlitOverlayWithCR(int i, int j, int k, int l)
      • with optional int m, int n, mnopqrstuvw
    • SetTextureAlphaLevel(int i, int j)
  • rm - Resource Manager
    • int OpenResource(str path)
      • loads resource s and returns ID of the loaded resource.
      • For directories the path has to begin and end with /.
    • CloseResource(int i)
    • lightUserData, int LoadFile(int i, str s)
    • UnloadFile(int i, userData u)
  • time
    • int GetRealTime()
    • Sleep(int ms)
  • log
    • Log(int level, str message)
      • prints somewhere if level is lower or equal to currently set log level
    • SetLevel(int level)
      • sets logging level (default is ???)
      • LOG_NONE - 0
      • LOG_CRITICAL - 1
      • LOG_IMPORTANT - 2
      • LOG_NORMAL - 3
      • LOG_VERBOSE - 4
      • LOG_DEBUG - 5
    • SetModule(int i, int j)
    • PrintRaw(str message)
      • prints somewhere if sebug state is enabled
    • PrintLine(str message)
      • prints somewhere
    • DebugSetState(int enabled)
      • sets debug state 0/1
      • PrintRaw works only if enabled is non-zero
  • pointer
    • lightUserData *CreateUserData(int size)
      • probably allocs size bytes of space
    • DestroyUserData(userData u) - empty func????
    • str ToString(userData u)
    • str ToStringRange(userData u, int min, int max)
      • returns [min, max) bytes of data
    • lightUserData FromString(str s)
    • int GetIndex(userData u, int i)
    • int GetU32MSB(userData u, int i)
    • SetU32MSB(userData u, int i, int j)
    • int GetU32LSB(userData u, int i)
    • SetU32LSB(userData u, int i, int j)
    • str ByteToAscii(int i)
    • int AsciiToByte(str s)
  • zmath - there is no standard math library included
    • int Mod(int i, int j)
    • int Rand(int min, int max)
      • gets random int that min <= n <= max - TODO check if this is correct
    • RandSeed(int i)
      • initializes Rand, seed can be set to time.GetRealTime()
  • input
    • ClearKeyQueue()
    • int, int, int GetKey()
    • int, int, int WaitForKey()
    • int EnableRemotes()
    • int DisableRemotes()
    • SetMode(int mode)
      • known modes: 0 - 4, defaults to 0
    • int GetMode()
    • SetQueueSize(int size)
    • SetRandomKeysTable(int []t)
      • I have no idea if I read this function correctly, or how many elelkemts in a table is expected (4?)
  • iframe
    • int Load(int resID, str filename)
    • Unload(int id)
    • Show(int i)
    • ShowPredefined(int i)
      • i==0 might be different from the rest?
      • only VeggieTales uses this function apparently - ShowPredefined(2)
      • possible known files
        • 0 - game_wave.m2v ? - GameWave logo screen
        • 1 - insert_disc.m2v ? - "Please insert disc...` screen
        • 2 - launching.m2v - Launching game... or Starting game... screen, depending on the engine version
    • Clear()
  • engine
    • ZMM_SetLeakDebugMode(int enabled)
    • ZMM_SetCheckPoint()
    • ZMM_VerifyCheckPoint()
    • int ZMM_GetTotalAllocMemory()
    • int ZMM_GetTotalFreeMemory()
    • int ZMM_GetMaxFreeMemory()
    • DR_SetEnable(int i)
    • DR_SetDebug(int i)
    • DR_SetAbsoluteCapping(int i, int j, int k)
    • DR_ClearPairCappings(int i, int j, int k)
    • DR_AddPairCapping()
    • OpenTray()
    • CloseTray()
    • EjectTray()
      • exactly the same as OpenTray()
    • int GetTrayState()
    • SoftwareReset()
    • WaitForDisk()
    • int GetNumOverlays()
    • int GetNumTextures()
    • str Version()
      • returns something like 1.01.3.xxxxxx
    • SetLineTraceMode(int enabled)
      • expects 0/1
    • int GetLineTraceMode()
  • text
    • int RenderSimple(int i, str s)
    • Render(str s, int i, int j, int k)
      • possible 10 optional args????
    • Remove(int i)
    • int GetOverlayId(int i)
  • font
    • int Load(int loc, str filepath)
    • Free(int i)
    • int GetBuiltinFontID()
      • the builtin font is called f_1955_s_22_m_4633_32_128.dat
  • movie
    • int Load(str path)
      • path is a full name, movie doesn't use rm library
    • SetLoop(int i)
    • Play()
    • Stop(int i)
    • Resume()
    • int GetState()
      • returns 0 if it's still playing, needs to be checked in a loop
  • audio
    • int Load(int i, str s)
    • Unload(int i)
    • Play(int i , int j)
  • spi
    • int Init()
    • int Open()
    • int Close()
    • int Write(userData u, int i,int j)
    • lightUserData Read(int i, int j)
  • uart
    • str RxD()
    • int TxD(str s, int i)
    • int Open()
      • returns 1, does nothing
    • int Close()
      • returns 1, does nothing
  • eeprom
    • bool SaveGameToNewSlot(int i, int j, str s, str s2, userData u)
    • str, str, bool GetSaveNameByID(int i,)
    • lightUserData, bool LoadSaveByID(int i)
    • UnloadData(userData u)
    • bool SaveGameToExistingSlot(int i, userData u)
    • int, bool EnumerateGameSavesByID(int i)
      • returns number_of_slots, 0
    • int, bool EnumerateGameSavesByName(str s)
      • returns number_of_slots, 0
    • Format()
    • CorruptFlash()
    • int CheckFlashIntegrity()
  • zfile
    • int OpenFile(str path)
      • doesn't use rm
      • optional int i and int loc arguments, defaults to 0
      • i is checked against 0 and -1 (and else)
      • loc is only used when i is not 0 or -1, loc has to be loc >= 0, see dict.Load()
      • returns -1 on error
    • lightUserData ReadBytes(int i, int j, int k)
      • can return nil
      • returns buffer; to free memory use pointer.DestroyUserData(buffer) after closing / after read
    • int, str ReadLine(int i)
      • returned int is set to 0 if string is returned
      • returned int is set to 1 if nil is returned
    • int SetHeadPosition(int i, int j)
    • int GetFileSize(int id)
    • int CloseFile(int id)
  • dict
    • lightUserData Load(int loc, str filename)
      • loc might be place where to load files from (DVD, HDD etc.)
      • filename contains .zdt extension
    • Unload(userdata i)
    • bool Lookup(userdata i, str s)
  • exp_int - there are mentions of INT port whatever it is
    • int Configure(bool i)
    • int Close()
    • int Test()
  • bit
    • int bnot(int i) - not
    • int band(int i, ...) - and
    • int bor(int i, ...) - or
    • int bxor(int i, ...) - xor
    • int lshift(int i, int j)
    • int rshift(int i, int j) - looks like unsigned right shift
    • int arshift(int i, int j) - looks like signed right shift
    • int mod(int i, int j)

Clone this wiki locally