Optimisation!

robotgame/level.py

@@ -24,10 +24,12 @@
 A generic level.
 """
 
+import pygame
+
 import player
 
 class Level(object):
-    def __init__(self, game, graphics_dir, paused=False):
+    def __init__(self, game, graphics_dir, size=(0, 0), paused=False):
         self.__dict__.update(locals())
 
         self.tiles = []
@@ -42,6 +44,11 @@ class Level(object):
         self.player = player.Player(self, 0, 0)
         self.objects.append(self.player)
 
+    def draw_background(self):
+        self.background = pygame.Surface(self.size)
+        for tile in self.tiles:
+            tile.draw(self.background)
+
     def restart(self):
         pass
 
@@ -58,8 +65,7 @@ class Level(object):
         self.camera_y = (self.player.y - screen_size[1] / 2 - 24)
 
     def draw(self, window):
-        for tile in self.tiles:
-            tile.draw(window)
+        window.blit(self.background, (0 - self.camera_x, -48 - self.camera_y))
 
         for obj in sorted(self.objects, key=lambda obj: (obj.y + obj.z)):
             obj.draw(window)