From 66a1ba46c33342ed73b05c33924aa2819818c912 Mon Sep 17 00:00:00 2001
From: Jean-Marie PLACE <jean-marie.place@univ-lille1.fr>
Date: Fri, 21 Jan 2022 23:25:02 +0100
Subject: [PATCH] convert to RGB (from ARGB) when saving as JPEG

---
 app/views/scodoc.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/app/views/scodoc.py b/app/views/scodoc.py
index 02bc1fb1..394dfe83 100644
--- a/app/views/scodoc.py
+++ b/app/views/scodoc.py
@@ -266,14 +266,16 @@ def _return_logo(name="header", dept_id="", small=False, strict: bool = True):
         suffix = logo.suffix
         if small:
             with PILImage.open(logo.filepath) as im:
-                im.thumbnail(SMALL_SIZE)
-                stream = io.BytesIO()
                 # on garde le même format (on pourrait plus simplement générer systématiquement du JPEG)
                 fmt = {  # adapt suffix to be compliant with PIL save format
                     "PNG": "PNG",
                     "JPG": "JPEG",
                     "JPEG": "JPEG",
                 }[suffix.upper()]
+                if fmt == "JPEG":
+                    im = im.convert("RGB")
+                im.thumbnail(SMALL_SIZE)
+                stream = io.BytesIO()
                 im.save(stream, fmt)
                 stream.seek(0)
                 return send_file(stream, mimetype=f"image/{fmt}")