+def values(data, size):
+ for y in range(size[1]-1, -1, -1):
+ for x in range(size[0]):
+ yield data[x+y*size[0]]
+
+def values_multi(data, size):
+ for y in range(size[1]-1, -1, -1):
+ for x in range(size[0]):
+ for c in data[x+y*size[0]]:
+ yield c
+