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|
/* boot.lua */
static const char* boot_lua = R"(
jin._argv[2] = jin._argv[2] or '.'
jin.filesystem.init()
jin.filesystem.mount(jin._argv[2])
local conf = {}
if jin.filesystem.exist("config.lua") then
conf = require "config"
end
conf.width = conf.width or 600
conf.height = conf.height or 500
conf.fps = conf.fps or 60
conf.vsync = conf.vsync or false
conf.title = conf.title or ("jin v" .. jin.version())
-- initialize subsystems
jin.graphics.init(conf)
jin.audio.init(conf)
-- open debug mode, must after jin.graphics.init
if jin._argv[3] == '-d' then
jin.debug.init()
end
local function safecall(func, ...)
if func then
func(...)
end
end
function jin.core.run()
local load = jin.core.load
local running = jin.core.running
local second = jin.time.second
local sleep = jin.time.sleep
local poll = jin.event.poll
local unbind = jin.graphics.unbind
local clear = jin.graphics.clear
local color = jin.graphics.color
local study = jin.graphics.study
local onDraw = jin.core.onDraw
local onUpdate = jin.core.onUpdate
local onEvent = jin.core.onEvent
local present = jin.graphics.present
local setkey = jin.keyboard.set
local dstatus = jin.debug.status
local drender = jin.debug.render
local fps = conf.fps
safecall(load)
local previous = second()
local SEC_PER_UPDATE = 1 / fps
local dt = SEC_PER_UPDATE
while(running()) do
for _, e in pairs(poll()) do
if e.type == "keydown" then
setkey(e.key, true)
elseif e.type == "keyup" then
setkey(e.key, false)
end
safecall(onEvent, e)
end
if not running() then
break
end
safecall(onUpdate, dt)
-- bind to default render buffer
unbind()
clear()
color()
study()
safecall(onDraw)
-- render debug window
if dstatus() then
drender()
end
present()
-- frame control
local current = second()
dt = current - previous
local wait = SEC_PER_UPDATE - dt
previous = previous + SEC_PER_UPDATE
if wait > 0 then
sleep(wait)
dt = SEC_PER_UPDATE
else
previous = current
end
end
end
local function onError(msg)
local tab = ' '
print("Error:\n" .. msg)
function jin.core.onEvent(e)
if e.type == 'quit' then
jin.core.stop()
end
end
local ww, wh = jin.graphics.size()
function jin.core.onDraw()
jin.graphics.write("Error: ", 10, 10, 30, 3, 30)
jin.graphics.write(msg, 10, 50)
end
end
local function main()
if jin.filesystem.exist("main.lua") then
-- require main game script
xpcall(function() require"main" end, onError)
jin.core.run()
else
-- no game
function jin.core.onEvent(e)
if e.type == 'quit' then
jin.core.stop()
end
end
function jin.core.onDraw()
jin.graphics.clear(111, 134, 125, 255)
local ww, wh = jin.graphics.size()
local fw, fh = jin.graphics.box("no game", 20, 1, 20)
jin.graphics.write("no game", ww /2 - fw / 2, wh * 2/3, 16, 1, 18)
end
jin.core.run()
end
-- quit subsystems
jin.graphics.destroy()
jin.audio.destroy()
-- exit whole game
jin.core.quit()
end
main()
)";
|
