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/* boot.lua */
static const char* boot_lua = R"(
-- Set game root directory
jin.args[2] = jin.args[2] or '.'
jin.filesystem.init()
jin.filesystem.mount(jin.args[2])
jin.config = {}
local function call(func, ...)
if func then
return func(...)
end
end
local function open_sub_systems()
jin.audio.init()
jin.graphics.init(jin.config)
end
local function close_sub_systems()
jin.audio.destroy()
jin.graphics.destroy()
end
-- Default game loop
function jin.core.run()
call(jin.core.onLoad)
jin.graphics.reset()
local dt = 0
local previous = jin.time.second()
local current = previous
while jin.core.running() do
for _, e in pairs(jin.event.poll()) do
if e.type == "KeyDown" then
jin.keyboard.set(e.key, true)
elseif e.type == "KeyUp" then
jin.keyboard.set(e.key, false)
end
call(jin.core.onEvent, e)
end
previous = current
current = jin.time.second()
dt = current - previous
call(jin.core.onUpdate, dt)
jin.graphics.clear()
call(jin.core.onDraw)
jin.graphics.present()
jin.time.sleep(0.001)
end
end
local function noGame()
jin.core.onLoad = nil
jin.core.onEvent = function(e)
if e.type == "Quit" then
jin.core.stop()
end
end
jin.core.onUpdate = nil
jin.core.onDraw = function()
jin.graphics.print("No game", 5, 5)
end
end
local function main()
-- Load config file
if jin.filesystem.exist("config.lua") then
jin.config = require "config"
end
jin.config.width = jin.config.width or 580
jin.config.height = jin.config.height or 450
jin.config.vsync = jin.config.vsync or true
jin.config.title = jin.config.title or ("jin v" .. jin.version)
jin.config.resizable = jin.config.resizable or false
jin.config.fullscreen = jin.config.fullscreen or false
jin.config.fps = jin.config.fps or 60
-- Load game source.
if jin.filesystem.exist("main.lua") then
call(function() require"main" end)
else
call(noGame)
end
open_sub_systems()
call(jin.core.run)
close_sub_systems()
-- Quit
jin.core.quit()
end
-- Display error message.
local function onError(msg)
open_sub_systems()
local err = "Error:\n" .. msg .. "\n" .. debug.traceback()
jin.graphics.reset()
jin.graphics.setClearColor(100, 100, 100, 255)
jin.graphics.clear()
jin.graphics.print(err, 5, 5)
jin.graphics.present()
while jin.core.running() do
for _, e in pairs(jin.event.poll()) do
if e.type == "Quit" then
jin.core.stop()
end
end
jin.time.sleep(0.001)
end
close_sub_systems()
end
xpcall(main, onError)
)";
|
