--- a/mamba/data.py	Sun Sep 11 17:23:42 2011 +0200
+++ b/mamba/data.py	Sun Sep 11 17:23:59 2011 +0200
@@ -33,12 +33,20 @@
 
 
 IMAGES = {}
+MUTATED_IMAGES = {}
 
 
-def load_image(filename):
-    if filename not in IMAGES:
-        IMAGES[filename] = pygame.image.load(filepath(filename))
-        if pygame.display.get_init():
-            IMAGES[filename] = IMAGES[filename].convert_alpha(
-                pygame.display.get_surface())
-    return IMAGES[filename]
+def load_image(filename, mutators=()):
+    key = (filename, mutators)
+    if key in MUTATED_IMAGES:
+        return MUTATED_IMAGES[key]
+    if filename in IMAGES:
+        image = IMAGES[filename]
+    else:
+        image = pygame.image.load(filepath(filename))
+        image = image.convert_alpha(pygame.display.get_surface())
+        IMAGES[filename] = image
+    for mutator in mutators:
+        image = mutator(image)
+    MUTATED_IMAGES[key] = image
+    return image

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mamba/mutators.py	Sun Sep 11 17:23:59 2011 +0200
@@ -0,0 +1,3 @@
+"""Mutations to apply to images when they're loaded."""
+
+