From 3ded49c5eff3edd9993c9ee88a96661a459b866a Mon Sep 17 00:00:00 2001
From: Daniel Thompson <daniel@redfelineninja.org.uk>
Date: Mon, 9 Mar 2020 21:33:29 +0000
Subject: [PATCH] fonts: sans24: Minor refactor to reduce memory allocation

This is a useful but modest optimization (maybe 3% in string
rendering.
---
 wasp/fonts/sans24.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/wasp/fonts/sans24.py b/wasp/fonts/sans24.py
index 2fdb6f2..5cbe3b4 100644
--- a/wasp/fonts/sans24.py
+++ b/wasp/fonts/sans24.py
@@ -355,14 +355,15 @@ b'\x50\x13'
 
 _mvfont = memoryview(_font)
 _mvi = memoryview(_index)
-ifb = lambda l : l[0] | (l[1] << 8)
 
 def get_ch(ch):
+    mvi = _mvi
+    mvfont = _mvfont
+
     oc = ord(ch)
     ioff = 2 * (oc - 32 + 1) if oc >= 32 and oc <= 126 else 0
-    doff = ifb(_mvi[ioff : ])
-    width = ifb(_mvfont[doff : ])
+    doff = mvi[ioff] | (mvi[ioff+1] << 8)
+    width = mvfont[doff] | (mvfont[doff+1] << 8)
 
     next_offs = doff + 2 + ((width - 1)//8 + 1) * 24
     return _mvfont[doff + 2:next_offs], 24, width
-