writer.py: fast_mode optional relative import.

writer/writer.py

@@ -19,16 +19,21 @@
 # Slow method 2700μs typical, up to 11ms on larger fonts
 
 import framebuf
-fast_mode = False
+from uctypes import bytearray_at, addressof
+
+fast_mode = True
+try:
     try:
         from framebuf_utils import render
-    fast_mode = True
+    except ImportError:  # May be running in GUI. Try relative import.
+        try:
+            from .framebuf_utils import render
         except ImportError:
-    pass
+            fast_mode = False
 except ValueError:
-    print('Ignoring framebuf_utils.mpy: it was compiled for an incorrect architecture.')
+    fast_mode = False
+    print('Ignoring framebuf_utils.mpy: compiled for incorrect architecture.')
 
-from uctypes import bytearray_at, addressof
 
 class DisplayState():
     def __init__(self):