classes, better debugging and spritesheets

classes.lua

@@ -1,4 +1,27 @@
 
+local function newImage(path, alphaColor)
+    if (not alphaColor) then
+        return love.graphics.newImage(path)
+    end
+
+	local imageData = love.image.newImageData(path)
+
+	imageData:mapPixel(function(x, y, r, g, b, a)
+        if (r == alphaColor.r and
+            g == alphaColor.g and
+            b == alphaColor.b and
+            a == alphaColor.a) then
+            return 0, 0, 0, 0
+        end
+
+		return r, g, b, a
+	end)
+
+    local image = love.graphics.newImage(imageData)
+
+    return image
+end
+
 --[[
     Sprite Class
     This is essentially just a Wrapper for LÖVEs Image
@@ -7,10 +30,10 @@
 Sprite = {}
 Sprite.__index = Sprite
 
-function Sprite.new(path)
+function Sprite.new(path, alphaColor)
     local self = setmetatable({}, Sprite)
 
-    self.image = love.graphics.newImage(path)
+    self.image = newImage(path, alphaColor)
 
     return self
 end
@@ -21,41 +44,150 @@ end
 
 
 --[[
-    Audio Class
+    Spritesheet Class
+    This is essentially just a Wrapper for LÖVEs Image, specifically made for Spritesheets
+]]--
+
+Spritesheet = {}
+Spritesheet.__index = Spritesheet
+
+function Spritesheet.new(path, width, height, alphaColor)
+    local self = setmetatable({}, Spritesheet)
+
+    self.sprites = {}
+
+    if (string.find(path, ".json")) then
+        local contents, size = love.filesystem.read(path)
+        local sliceData = json.decode(contents)
+
+        print("games/" .. sliceData.image)
+        self.image = newImage("games/" .. sliceData.image, alphaColor)
+
+        -- Create the slices according to the sliceData
+        local imageWidth, imageHeight = self.image:getWidth(), self.image:getHeight()
+
+        local counter = 0
+        for _, data in pairs(sliceData) do
+            table.insert(self.sprites, love.graphics.newQuad(
+                data.x,
+                data.y,
+                data.width,
+                data.height,
+                imageWidth,
+                imageHeight
+            ))
+            counter = counter + 1
+        end
+
+        self.Count = counter
+
+        return self
+    end
+
+    self.image = newImage(path, alphaColor)
+
+    -- Generate slices
+    local imageWidth, imageHeight = self.image:getWidth(), self.image:getHeight()
+    local columns = math.floor(imageWidth / width)
+    local rows = math.floor(imageHeight / height)
+
+    local counter = 0
+    for x = 0, columns - 1 do
+        for y = 0, rows - 1 do
+            table.insert(self.sprites, love.graphics.newQuad(
+                x * width,
+                y * height,
+                width,
+                height,
+                imageWidth,
+                imageHeight
+            ))
+            counter = counter + 1
+        end
+    end
+
+    self.Count = counter
+
+    return self
+end
+
+function Spritesheet:Draw(slice, x, y)
+    local sprite = self.sprites[slice]
+    if sprite then
+        love.graphics.draw(self.image, sprite, x or 0, y or 0)
+    end
+end
+
+
+--[[
+    Sound Class
     This is essentially just a Wrapper for LÖVEs Source
 ]]--
 
-Audio = {}
+Sound = {}
-Audio.__index = Audio
+Sound.__index = Sound
 
-function Audio.new(path, soundType)
+function Sound.new(path, soundType)
-    local self = setmetatable({}, Audio)
+    local self = setmetatable({}, Sound)
 
     self.source = love.audio.newSource(path, soundType or "static")
 
     return self
 end
 
-function Audio:Play()
+function Sound:Play()
     self.source:play()
 end
 
-function Audio:Stop()
+function Sound:Stop()
     self.source:stop()
 end
 
-function Audio:Pause()
+function Sound:Pause()
     self.source:pause()
 end
 
-function Audio:Resume()
+function Sound:Resume()
     self.source:play()
 end
 
-function Audio:SetLooping(bool)
+function Sound:SetLooping(bool)
     self.source:setLooping(bool)
 end
 
-function Audio:SetVolume(volume)
+function Sound:SetVolume(volume)
     self.source:setVolume(volume)
 end
+
+
+--[[
+    Color Class
+    A convenient Color class that works with any love2D function
+]]--
+
+function Color(r, g, b, a)
+    r = (r or 255) / 255
+    g = (g or 255) / 255
+    b = (b or 255) / 255
+    a = (a or 255) / 255
+
+    local color = {
+        r = r, g = g, b = b, a = a,
+        [1] = r, [2] = g, [3] = b, [4] = a -- love2D expects a sequential array, so heres the fix for that
+    }
+
+    -- Return it as a class, that way we can use it freely anywhere we wish
+    return setmetatable(color, {
+        __index = function(tbl, key)
+            if key == 1 then return tbl.r
+            elseif key == 2 then return tbl.g
+            elseif key == 3 then return tbl.b
+            elseif key == 4 then return tbl.a
+            else return rawget(tbl, key)
+            end
+        end,
+        __tostring = function(tbl)
+            return tbl
+        end
+    })
+end

games/test.lua

@@ -3,26 +3,36 @@ NAME = "Test"
 AUTHOR = "Tarion"
 VERSION = 0
 
-local test = 0
+local backgroundColor = Color(48, 104, 20, 255)
-local delay = 0
-
-local last = ""
-
 function Load()
+    SetBackgroundColor(backgroundColor)
 end
 
 function Update(dt, curTime)
 end
 
-local sprite = Sprite("testSprites.png")
+local sprite = Spritesheet("testSprites.json", 16, 16, Color(48, 104, 80, 255))
+local testSound = Sound("testSound.mp3", "static")
+local test = 1
 function KeyPressed(key)
-    if (key == "f5") then
+    if (key == "f3") then
+        test = test - 1
+
+        if (test == 0) then
+            test = sprite.Count
+        end
+    elseif (key == "f4") then
         test = test + 1
-        sprite = Sprite("testSprites.png")
+
+        if (test == sprite.Count + 1) then
+            test = 1
+        end
+    elseif (key == "f2") then
+        testSound:Play()
     end
 end
 
 function Draw()
-    print("Loaded Sprites: " .. test, 10, 10)
+    DrawText(test .. "/" .. sprite.Count, 25, 25)
-    sprite:Draw(100, 0)
+    sprite:Draw(test, 50, 0)
 end

games/testSprites.json

@@ -0,0 +1,18 @@
+[
+    {
+        "image": "testSprites.png"
+    },
+    {"x":0,"y":0,"width":64,"height":24},
+    {"x":64,"y":0,"width":16,"height":24},
+    {"x":64,"y":0,"width":16,"height":24},
+    {"x":0,"y":24,"width":64,"height":24},
+    {"x":80,"y":52,"width":8,"height":12},
+    {"x":80,"y":68,"width":8,"height":12},
+    {"x":0,"y":72,"width":80,"height":24},
+    {"x":90,"y":48,"width":14,"height":48},
+    {"x":72,"y":96,"width":32,"height":15},
+    {"x":32,"y":96,"width":40,"height":15},
+    {"x":24,"y":96,"width":8,"height":8},
+    {"x":16,"y":96,"width":8,"height":8},
+    {"x":16,"y":104,"width":8,"height":8},
+    {"x":0,"y":96,"width":16,"height":16},{"x":0,"y":112,"width":32,"height":24},{"x":32,"y":111,"width":32,"height":24},{"x":72,"y":136,"width":32,"height":24}]

libraries/json.lua

@@ -0,0 +1,400 @@
+--
+-- json.lua
+--
+-- Copyright (c) 2019 rxi
+--
+-- Permission is hereby granted, free of charge, to any person obtaining a copy of
+-- this software and associated documentation files (the "Software"), to deal in
+-- the Software without restriction, including without limitation the rights to
+-- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+-- of the Software, and to permit persons to whom the Software is furnished to do
+-- so, subject to the following conditions:
+--
+-- The above copyright notice and this permission notice shall be included in all
+-- copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+-- SOFTWARE.
+--
+
+local json = { _version = "0.1.2" }
+
+-------------------------------------------------------------------------------
+-- Encode
+-------------------------------------------------------------------------------
+
+local encode
+
+local escape_char_map = {
+  [ "\\" ] = "\\\\",
+  [ "\"" ] = "\\\"",
+  [ "\b" ] = "\\b",
+  [ "\f" ] = "\\f",
+  [ "\n" ] = "\\n",
+  [ "\r" ] = "\\r",
+  [ "\t" ] = "\\t",
+}
+
+local escape_char_map_inv = { [ "\\/" ] = "/" }
+for k, v in pairs(escape_char_map) do
+  escape_char_map_inv[v] = k
+end
+
+
+local function escape_char(c)
+  return escape_char_map[c] or string.format("\\u%04x", c:byte())
+end
+
+
+local function encode_nil(val)
+  return "null"
+end
+
+
+local function encode_table(val, stack)
+  local res = {}
+  stack = stack or {}
+
+  -- Circular reference?
+  if stack[val] then error("circular reference") end
+
+  stack[val] = true
+
+  if rawget(val, 1) ~= nil or next(val) == nil then
+    -- Treat as array -- check keys are valid and it is not sparse
+    local n = 0
+    for k in pairs(val) do
+      if type(k) ~= "number" then
+        error("invalid table: mixed or invalid key types")
+      end
+      n = n + 1
+    end
+    if n ~= #val then
+      error("invalid table: sparse array")
+    end
+    -- Encode
+    for i, v in ipairs(val) do
+      table.insert(res, encode(v, stack))
+    end
+    stack[val] = nil
+    return "[" .. table.concat(res, ",") .. "]"
+
+  else
+    -- Treat as an object
+    for k, v in pairs(val) do
+      if type(k) ~= "string" then
+        error("invalid table: mixed or invalid key types")
+      end
+      table.insert(res, encode(k, stack) .. ":" .. encode(v, stack))
+    end
+    stack[val] = nil
+    return "{" .. table.concat(res, ",") .. "}"
+  end
+end
+
+
+local function encode_string(val)
+  return '"' .. val:gsub('[%z\1-\31\\"]', escape_char) .. '"'
+end
+
+
+local function encode_number(val)
+  -- Check for NaN, -inf and inf
+  if val ~= val or val <= -math.huge or val >= math.huge then
+    error("unexpected number value '" .. tostring(val) .. "'")
+  end
+  return string.format("%.14g", val)
+end
+
+
+local type_func_map = {
+  [ "nil"     ] = encode_nil,
+  [ "table"   ] = encode_table,
+  [ "string"  ] = encode_string,
+  [ "number"  ] = encode_number,
+  [ "boolean" ] = tostring,
+}
+
+
+encode = function(val, stack)
+  local t = type(val)
+  local f = type_func_map[t]
+  if f then
+    return f(val, stack)
+  end
+  error("unexpected type '" .. t .. "'")
+end
+
+
+function json.encode(val)
+  return ( encode(val) )
+end
+
+
+-------------------------------------------------------------------------------
+-- Decode
+-------------------------------------------------------------------------------
+
+local parse
+
+local function create_set(...)
+  local res = {}
+  for i = 1, select("#", ...) do
+    res[ select(i, ...) ] = true
+  end
+  return res
+end
+
+local space_chars   = create_set(" ", "\t", "\r", "\n")
+local delim_chars   = create_set(" ", "\t", "\r", "\n", "]", "}", ",")
+local escape_chars  = create_set("\\", "/", '"', "b", "f", "n", "r", "t", "u")
+local literals      = create_set("true", "false", "null")
+
+local literal_map = {
+  [ "true"  ] = true,
+  [ "false" ] = false,
+  [ "null"  ] = nil,
+}
+
+
+local function next_char(str, idx, set, negate)
+  for i = idx, #str do
+    if set[str:sub(i, i)] ~= negate then
+      return i
+    end
+  end
+  return #str + 1
+end
+
+
+local function decode_error(str, idx, msg)
+  local line_count = 1
+  local col_count = 1
+  for i = 1, idx - 1 do
+    col_count = col_count + 1
+    if str:sub(i, i) == "\n" then
+      line_count = line_count + 1
+      col_count = 1
+    end
+  end
+  error( string.format("%s at line %d col %d", msg, line_count, col_count) )
+end
+
+
+local function codepoint_to_utf8(n)
+  -- http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=iws-appendixa
+  local f = math.floor
+  if n <= 0x7f then
+    return string.char(n)
+  elseif n <= 0x7ff then
+    return string.char(f(n / 64) + 192, n % 64 + 128)
+  elseif n <= 0xffff then
+    return string.char(f(n / 4096) + 224, f(n % 4096 / 64) + 128, n % 64 + 128)
+  elseif n <= 0x10ffff then
+    return string.char(f(n / 262144) + 240, f(n % 262144 / 4096) + 128,
+                       f(n % 4096 / 64) + 128, n % 64 + 128)
+  end
+  error( string.format("invalid unicode codepoint '%x'", n) )
+end
+
+
+local function parse_unicode_escape(s)
+  local n1 = tonumber( s:sub(3, 6),  16 )
+  local n2 = tonumber( s:sub(9, 12), 16 )
+  -- Surrogate pair?
+  if n2 then
+    return codepoint_to_utf8((n1 - 0xd800) * 0x400 + (n2 - 0xdc00) + 0x10000)
+  else
+    return codepoint_to_utf8(n1)
+  end
+end
+
+
+local function parse_string(str, i)
+  local has_unicode_escape = false
+  local has_surrogate_escape = false
+  local has_escape = false
+  local last
+  for j = i + 1, #str do
+    local x = str:byte(j)
+
+    if x < 32 then
+      decode_error(str, j, "control character in string")
+    end
+
+    if last == 92 then -- "\\" (escape char)
+      if x == 117 then -- "u" (unicode escape sequence)
+        local hex = str:sub(j + 1, j + 5)
+        if not hex:find("%x%x%x%x") then
+          decode_error(str, j, "invalid unicode escape in string")
+        end
+        if hex:find("^[dD][89aAbB]") then
+          has_surrogate_escape = true
+        else
+          has_unicode_escape = true
+        end
+      else
+        local c = string.char(x)
+        if not escape_chars[c] then
+          decode_error(str, j, "invalid escape char '" .. c .. "' in string")
+        end
+        has_escape = true
+      end
+      last = nil
+
+    elseif x == 34 then -- '"' (end of string)
+      local s = str:sub(i + 1, j - 1)
+      if has_surrogate_escape then
+        s = s:gsub("\\u[dD][89aAbB]..\\u....", parse_unicode_escape)
+      end
+      if has_unicode_escape then
+        s = s:gsub("\\u....", parse_unicode_escape)
+      end
+      if has_escape then
+        s = s:gsub("\\.", escape_char_map_inv)
+      end
+      return s, j + 1
+
+    else
+      last = x
+    end
+  end
+  decode_error(str, i, "expected closing quote for string")
+end
+
+
+local function parse_number(str, i)
+  local x = next_char(str, i, delim_chars)
+  local s = str:sub(i, x - 1)
+  local n = tonumber(s)
+  if not n then
+    decode_error(str, i, "invalid number '" .. s .. "'")
+  end
+  return n, x
+end
+
+
+local function parse_literal(str, i)
+  local x = next_char(str, i, delim_chars)
+  local word = str:sub(i, x - 1)
+  if not literals[word] then
+    decode_error(str, i, "invalid literal '" .. word .. "'")
+  end
+  return literal_map[word], x
+end
+
+
+local function parse_array(str, i)
+  local res = {}
+  local n = 1
+  i = i + 1
+  while 1 do
+    local x
+    i = next_char(str, i, space_chars, true)
+    -- Empty / end of array?
+    if str:sub(i, i) == "]" then
+      i = i + 1
+      break
+    end
+    -- Read token
+    x, i = parse(str, i)
+    res[n] = x
+    n = n + 1
+    -- Next token
+    i = next_char(str, i, space_chars, true)
+    local chr = str:sub(i, i)
+    i = i + 1
+    if chr == "]" then break end
+    if chr ~= "," then decode_error(str, i, "expected ']' or ','") end
+  end
+  return res, i
+end
+
+
+local function parse_object(str, i)
+  local res = {}
+  i = i + 1
+  while 1 do
+    local key, val
+    i = next_char(str, i, space_chars, true)
+    -- Empty / end of object?
+    if str:sub(i, i) == "}" then
+      i = i + 1
+      break
+    end
+    -- Read key
+    if str:sub(i, i) ~= '"' then
+      decode_error(str, i, "expected string for key")
+    end
+    key, i = parse(str, i)
+    -- Read ':' delimiter
+    i = next_char(str, i, space_chars, true)
+    if str:sub(i, i) ~= ":" then
+      decode_error(str, i, "expected ':' after key")
+    end
+    i = next_char(str, i + 1, space_chars, true)
+    -- Read value
+    val, i = parse(str, i)
+    -- Set
+    res[key] = val
+    -- Next token
+    i = next_char(str, i, space_chars, true)
+    local chr = str:sub(i, i)
+    i = i + 1
+    if chr == "}" then break end
+    if chr ~= "," then decode_error(str, i, "expected '}' or ','") end
+  end
+  return res, i
+end
+
+
+local char_func_map = {
+  [ '"' ] = parse_string,
+  [ "0" ] = parse_number,
+  [ "1" ] = parse_number,
+  [ "2" ] = parse_number,
+  [ "3" ] = parse_number,
+  [ "4" ] = parse_number,
+  [ "5" ] = parse_number,
+  [ "6" ] = parse_number,
+  [ "7" ] = parse_number,
+  [ "8" ] = parse_number,
+  [ "9" ] = parse_number,
+  [ "-" ] = parse_number,
+  [ "t" ] = parse_literal,
+  [ "f" ] = parse_literal,
+  [ "n" ] = parse_literal,
+  [ "[" ] = parse_array,
+  [ "{" ] = parse_object,
+}
+
+
+parse = function(str, idx)
+  local chr = str:sub(idx, idx)
+  local f = char_func_map[chr]
+  if f then
+    return f(str, idx)
+  end
+  decode_error(str, idx, "unexpected character '" .. chr .. "'")
+end
+
+
+function json.decode(str)
+  if type(str) ~= "string" then
+    error("expected argument of type string, got " .. type(str))
+  end
+  local res, idx = parse(str, next_char(str, 1, space_chars, true))
+  idx = next_char(str, idx, space_chars, true)
+  if idx <= #str then
+    decode_error(str, idx, "trailing garbage")
+  end
+  return res
+end
+
+
+return json

main.lua

@@ -1,8 +1,15 @@
 
+if arg[2] == "debug" then
+    require("lldebugger").start()
+end
+
+
+json = require("libraries/json")
+
 require("classes")
 
 local LoadObject = {
-    ["sprite"] = function(name)
+    ["sprite"] = function(name, alphaColor)
         name = "games/" .. name
     
         local info = love.filesystem.getInfo(name)
@@ -15,10 +22,10 @@ local LoadObject = {
             return
         end
 
-        local newObject = Sprite.new(name)
+        local newObject = Sprite.new(name, alphaColor)
 
         virtual.loadedObjects[newObject] = {
-            object = newSprite,
+            object = newObject,
             size = info.size,
         }
         virtual.currentMemory = virtual.currentMemory + info.size
@@ -26,7 +33,32 @@ local LoadObject = {
 
         return newObject
     end,
-    ["audio"] = function(name, soundType)
+    ["spritesheet"] = function(name, width, height, alphaColor)
+        name = "games/" .. name
+        height = height or width
+
+        local info = love.filesystem.getInfo(name)
+        if (not info) then
+            error("Failed to load Object (FILE NOT FOUND) ("..name..")")
+            return
+        end
+        if ((info.size + virtual.currentMemory) > virtual.maxMemory) then
+            error("Failed to load Object (MAX MEMORY) ("..name..")")
+            return
+        end
+
+        local newObject = Spritesheet.new(name, width, height, alphaColor)
+
+        virtual.loadedObjects[newObject] = {
+            object = newObject,
+            size = info.size,
+        }
+        virtual.currentMemory = virtual.currentMemory + info.size
+        virtual.loadedCount = virtual.loadedCount + 1
+
+        return newObject
+    end,
+    ["sound"] = function(name, soundType)
         name = "games/" .. name
         soundType = soundType or "static"
 
@@ -40,10 +72,10 @@ local LoadObject = {
             return
         end
 
-        local newObject = Audio.new(name, soundType)
+        local newObject = Sound.new(name, soundType)
 
         virtual.loadedObjects[newObject] = {
-            object = newSprite,
+            object = newObject,
             size = info.size,
         }
         virtual.currentMemory = virtual.currentMemory + info.size
@@ -53,6 +85,10 @@ local LoadObject = {
     end,
 }
 
+local function SetBackgroundColor(color)
+    love.graphics.setBackgroundColor(color)
+end
+
 -- Establish Sandbox
 -- Everything in the table is what the Sandbox has access to
 local consoleEnv = {
@@ -65,17 +101,18 @@ local consoleEnv = {
     Draw,
     KeyPressed,
 
-    Sprite2 = LoadSprite,
     Sprite = LoadObject["sprite"],
+    Spritesheet = LoadObject["spritesheet"],
+    Sound = LoadObject["sound"],
 
-    print = love.graphics.print,
+    Color = Color,
+
+    SetBackgroundColor = SetBackgroundColor,
+    DrawText = love.graphics.print,
+
+    print = print,
 }
 consoleEnv._G = consoleEnv
-setmetatable(consoleEnv, {
-    __index = function(_, key)
-        return function(...) end -- Return an empty function to avoid erroring, not perfect, but works most of the time
-    end
-})
 
 function loadGame(gameName)
     local fn, err = loadfile("games/" .. gameName .. ".lua", "t", consoleEnv)
@@ -83,9 +120,9 @@ function loadGame(gameName)
         error("Failed to load sandbox file (1): " .. err)
     end
 
-    local ok, execErr = pcall(fn)
+    local ok, execErr = xpcall(fn, debug.traceback)
     if not ok then
-        error("Error running sandbox file (2): " .. execErr)
+        error("Error running sandbox file (2):\n" .. execErr)
     end
 
     love.window.setTitle(consoleEnv.NAME or "NULL")
@@ -100,7 +137,6 @@ function love.load()
     -- Console Variables
     curTime = 0
     scaling = 4
-    keysPressed = {}
 
     -- Setup Window
     love.graphics.setDefaultFilter("nearest", "nearest")
@@ -118,7 +154,6 @@ function love.load()
 
     loadGame("test")
 
-
     if (consoleEnv.Load) then
         consoleEnv.Load()
     end
@@ -128,26 +163,7 @@ function love.keypressed(key)
     if key == "escape" then
         love.event.quit()
     end
-
+    if (key == "f1") then
-    keysPressed[key] = true
-
-    if (consoleEnv.KeyPressed) then
-        consoleEnv.KeyPressed(key)
-    end
-end
-
-function love.keyboard.wasPressed(key)
-    return keysPressed[key]
-end
-
-function love.window.updateWindow()
-    love.window.setMode(scaling*240, scaling*160, {resizable=false, vsync=0})
-end
-
-function love.update(dt)
-    curTime = curTime + dt
-
-    if (love.keyboard.wasPressed("f1")) then
         scaling = scaling + 1
 
         if (scaling == maxScaling+1) then
@@ -157,7 +173,17 @@ function love.update(dt)
         love.window.updateWindow()
     end
 
-    keysPressed = {}
+    if (consoleEnv.KeyPressed) then
+        consoleEnv.KeyPressed(key)
+    end
+end
+
+function love.window.updateWindow()
+    love.window.setMode(scaling*240, scaling*160, {resizable=false, vsync=0})
+end
+
+function love.update(dt)
+    curTime = curTime + dt
 
     if (consoleEnv.Update) then
         consoleEnv.Update(dt, curTime)
@@ -176,3 +202,15 @@ function love.draw()
         consoleEnv.Draw()
     end
 end
+
+
+
+local love_errorhandler = love.errhand
+
+function love.errorhandler(msg)
+    if lldebugger then
+        error(msg, 2)
+    else
+        return love_errorhandler(msg)
+    end
+end