Started implementing game states and intro.

src/intro.lua

@@ -0,0 +1,66 @@
+------------------------------------------------------------------------------
+-- Imports
+------------------------------------------------------------------------------
+
+local love = require 'love'
+local make_class = require 'src.classes'
+local GameState = require 'src.gstate'
+
+
+------------------------------------------------------------------------------
+-- Class definitions
+------------------------------------------------------------------------------
+
+local Intro = make_class(GameState)
+
+
+------------------------------------------------------------------------------
+-- Class methods
+------------------------------------------------------------------------------
+
+function Intro:_init(name, index)
+    -- Call super-class constructor.
+    GameState._init(self, name, index)
+
+    -- Attribute definitions
+    self.skip = false
+end
+
+
+function Intro:load()
+    self.background = love.graphics.newImage('imgs/cpu.png')
+    self.valid = true
+end
+
+
+function Intro:update(_)
+    if not self.skip then return self.index else return 0 end
+end
+
+
+function Intro:draw()
+    if self.valid then
+        love.graphics.draw(self.background, 0, 0)
+        love.graphics.print(string.format('OS: %s', love.system.getOS()), 5, 5)
+        love.graphics.print(string.format('Love version: %s', love.getVersion()), 5, 15)
+        love.graphics.print(string.format('Memory usage: %s KiB', love.system.getMemUsage()), 5, 25)
+    end
+end
+
+
+function Intro:unload()
+    self.background = nil
+    self.valid = false
+end
+
+
+function Intro:keypressed(_)
+    self.skip = true
+end
+
+
+------------------------------------------------------------------------------
+-- Module return
+------------------------------------------------------------------------------
+
+return Intro