From 118b7bab006323bf65a23c3fe3e1a0a30a91c17a Mon Sep 17 00:00:00 2001
From: Daniel Thompson <daniel@redfelineninja.org.uk>
Date: Mon, 3 Feb 2020 22:32:53 +0000
Subject: wasp: st7789: Reuse the pre-allocated linebuffer


diff --git a/wasp/drivers/st7789.py b/wasp/drivers/st7789.py
index 933df8d..8a9e4d6 100644
--- a/wasp/drivers/st7789.py
+++ b/wasp/drivers/st7789.py
@@ -98,8 +98,7 @@ class ST7789(object):
         (sx, sy, rle) = image
         self.set_window(pos[0], pos[1], sx, sy)
 
-        # TODO: rework algorithm to allow us to reuse the line buffer
-        buf = bytearray(2*sx)
+        buf = memoryview(self.linebuffer)[0:2*sx]
         bp = 0
         color = bg
 
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