mounting, API, arrays

ll-min.lua

@@ -0,0 +1,23 @@
+-- minimal Love Loader API
+
+if not llUsed then
+
+COLDIV = love.getVersion() == 0 and 1 or 255
+
+function love.resize(x, y)
+  W, H = x, y
+
+  if resize then resize(W, H) end
+
+  collectgarbage 'collect' -- because new font isn't clears
+end
+love.resize(love.graphics.getDimensions())
+
+function llHome()
+  love.event.push('quit')
+end
+function love.event.quit()
+  llHome()
+end
+
+end

main.lua

@@ -10,15 +10,14 @@ local sgme
 local cx, cy, cw, ch
 local f, bf
 
-function love.resize(x, y)
-  W, H = x, y
+local ffi = require 'ffi'
+local fd
+ffi.cdef [[
+  int PHYSFS_mount(const char *, const char *, int);
+  int PHYSFS_unmount(const char *);
+]]
 
-  if resize then resize(W, H) end
-
-  collectgarbage 'collect' -- because new font isn't clears
-end
-
-function resize()
+local function llResz()
   cw, ch = W / 1.25, H / 1.25
   cx, cy = (W - cw) / 2, (H - ch) / 2
 
@@ -27,8 +26,31 @@ function resize()
   f  = love.graphics.newFont(th / 3)
   bf = love.graphics.newFont(th / 2)
 end
+resize = llResz
 
-love.resize(love.graphics.getDimensions())
+require 'll-min'
+llUsed = true
+
+local function chroot(dir, main)
+  fd = love.filesystem.getSource() .. dir
+  love.filesystem.setRequirePath(
+    '?.lua;?/init.lua;'
+    .. dir .. '/?.lua;'
+    .. dir .. '/?/init.lua;'
+  )
+  -- FIXME: Bug in Linux (Debian)
+  ffi.C.PHYSFS_mount(fd, '/', 0);
+  if main then
+    load(love.filesystem.read(dir ..'/'.. main), main)()
+  end
+end
+
+local function escChroot()
+  if fd then
+    ffi.C.PHYSFS_unmount(fd);
+    fd = nil
+  end
+end
 
 local function gmeNew(cont, dir, file)
   local gme = {
@@ -36,6 +58,9 @@ local function gmeNew(cont, dir, file)
     desc = 'No description provided.',
     dir = dir,
     main = 'main.lua',
+    pics = nil,
+    psel = 2,
+    ppsl = 1,
   }
   local fi = false
   cont = cont or ''
@@ -47,10 +72,27 @@ local function gmeNew(cont, dir, file)
     or k == 'main'
     then gme[k] = v
       fi = true
+    elseif k == 'pic' then
+      gme.pics = gme.pics or {}
+      table.insert(gme.pics, v)
+      fi = true
+    elseif k == 'pics' then
+      local t = {}
+      v = v:sub(2, -2)
+      for v in v:gmatch '%s*([^;]+%a+)%s*;?'
+      do table.insert(t, v) end
+      gme[k] = t
+      fi = true
     elseif k
     then error('unknown field "'.. k ..'" in "'.. file ..'"')
     end
   end
+  if gme.pics then
+    for k, v in pairs(gme.pics) do
+      gme.pics[k] = love.graphics.newImage(root .. dir ..'/'.. v)
+    end
+    gme.psel = math.min(2, #gme.pics)
+  end
   if not fi then
     gme.name = dir
   end
@@ -63,7 +105,11 @@ for _, v in pairs(love.filesystem.getDirectoryItems(root)) do
 end
 
 local pf, mx, mb, mpb
-local function update()
+
+local pcht = 60 * 5
+local pchat = math.floor(1 / pcht * 2 * 255 + 0.5)
+local pchv, pcha = 0, 0
+local function llUpdate()
   mx = love.mouse.getX()
   mpb = mb
   mb = 0
@@ -80,9 +126,23 @@ local function update()
     else sgme = gms[sel]
     end
   end
+
+  pchv = pchv + 1
+  if pchv >= pcht then
+    pchv, pcha = 0, 0
+    for _, v in pairs(gms) do
+      if v.pics then
+        v.ppsl = v.psel
+        v.psel = v.psel + 1
+        if v.psel > #v.pics
+        then v.psel = 1 end
+      end
+    end
+  else pcha = math.min(255, pcha + pchat)
+  end
 end
 
-local function draw()
+local function llDraw()
   love.graphics.polygon('fill',
     8, H / 2,
     32, H / 2 - 32,
@@ -97,8 +157,15 @@ local function draw()
   local gme = gms[sel]
   if gme then
     local ph = ch / 1.5
+    if gme.pics then
+      local p, n = gme.pics[gme.ppsl], gme.pics[gme.psel]
+      love.graphics.draw(p, cx, cy, 0, cw / p:getWidth(), ph / p:getHeight())
+      love.graphics.setColor(255, 255, 255, pcha / COLDIV)
+      love.graphics.draw(n, cx, cy, 0, cw / n:getWidth(), ph / n:getHeight())
+      love.graphics.setColor(255, 255, 255, 255)
+    end
+    love.graphics.rectangle('line', cx, cy, cw, ph)
     love.graphics.rectangle('line', cx, cy, cw, ch)
-    love.graphics.rectangle('fill', cx, cy, cw, ph)
 
     oy = cy + ph
     love.graphics.setFont(bf)
@@ -118,32 +185,35 @@ local function draw()
   end
 end
 
-function love.handlers.quit(c)
-  -- for some cases when event handler (like this one below) can't correctly close
-  os.exit(c or 0)
+function llHome()
+  escChroot()
+  love.event.push('quit', 'restart')
 end
 
-while not sgme do
+local brk = false
+while not brk and not sgme do
   -- event handling
   love.event.pump()
   for n, a,b,c,d,e,f in love.event.poll() do
+    if n == 'quit' then
+      escChroot()
+      love.event.push('quit')
+      brk = true; break
+    end
     love.handlers[n](a,b,c,d,e,f)
   end
 
   -- update and drawing
-  update()
+  llUpdate()
   love.graphics.origin()
   love.graphics.clear(0, 0, 0)
-  draw()
+  llDraw()
   love.graphics.present()
   love.timer.sleep(0.001)
 end
 
+if sgme then
   love.graphics.setNewFont()
   resize = nil
-require(root .. sgme.dir ..'/'.. sgme.main:sub(1, -5))
-
--- things left:
--- W and H global variables
--- love.resize and optional global resize function
--- love.handlers.quit - modified but can be required
+  chroot(root .. sgme.dir, sgme.main)
+end

readme.md

@@ -18,7 +18,15 @@ so there are some variables can be used in game:
 
 `love.resize` and optional `resize` payload: functions called when screen size when changed and at boot.
 
-`love.handlers.quit`: function on exit which can be called until game was selected to keep responsive or for custom love.run function.
+`love.event.quit`: function to quit to menu screen
+
+`COLDIV`: color divider (1 or 255) to setColor function
+
+`llUsed`: is Love Loader used
+
+`llHome`: function to quit to menu screen
+
+They also can be used without Love Loader if load `ll-min.lua`
 
 # Fill game information
 
@@ -31,4 +39,6 @@ Syntax is `k = v` with `# comments`
 name = New awesome game using Love Loader
 desc = Some descripion about the game.
 # main = optional main file instead of `main.lua`
+pic = screen.png
+pics = [ screen.png; screen2.png ] # wow array
 ```