From 38ad9ab9e58474f56c0ff922717db8a6f3a4c2f6 Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <pavol@rusnak.io>
Date: Sat, 7 May 2022 16:27:13 +0200
Subject: [PATCH] fix(python): only even-width grayscale icons are supported

[no changelog]
---
 python/src/trezorlib/toif.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/python/src/trezorlib/toif.py b/python/src/trezorlib/toif.py
index 43e52f0e0..2c397b7f5 100644
--- a/python/src/trezorlib/toif.py
+++ b/python/src/trezorlib/toif.py
@@ -155,6 +155,8 @@ def from_image(
 
     if image.mode == "L":
         toif_mode = firmware.ToifMode.grayscale
+        if image.size[0] % 2 != 0:
+            raise ValueError("Only even-width grayscale images are supported")
         toif_data = _from_pil_grayscale(image.getdata())
     elif image.mode == "RGB":
         toif_mode = firmware.ToifMode.full_color