From bcc83e98ed60a57ee84fb4fe16a3f9c1af8cf3da Mon Sep 17 00:00:00 2001
From: tastytea <tastytea@tastytea.de>
Date: Thu, 27 Oct 2022 18:44:06 +0200
Subject: [PATCH] thumbnail WebP as WebP

---
 synapse/config/repository.py         | 6 +++++-
 synapse/rest/media/v1/thumbnailer.py | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/synapse/config/repository.py b/synapse/config/repository.py
index e4759711ed95..6701aad7c58d 100644
--- a/synapse/config/repository.py
+++ b/synapse/config/repository.py
@@ -47,7 +47,7 @@
 THUMBNAIL_SUPPORTED_MEDIA_FORMAT_MAP = {
     "image/jpeg": "jpeg",
     "image/jpg": "jpeg",
-    "image/webp": "jpeg",
+    "image/webp": "webp",
     # Thumbnails can only be jpeg or png. We choose png thumbnails for gif
     # because it can have transparency.
     "image/gif": "png",
@@ -102,6 +102,10 @@ def parse_thumbnail_requirements(
                 requirement.append(
                     ThumbnailRequirement(width, height, method, "image/png")
                 )
+            elif thumbnail_format == "webp":
+                requirement.append(
+                    ThumbnailRequirement(width, height, method, "image/webp")
+                )
             else:
                 raise Exception(
                     "Unknown thumbnail mapping from %s to %s. This is a Synapse problem, please report!"
diff --git a/synapse/rest/media/v1/thumbnailer.py b/synapse/rest/media/v1/thumbnailer.py
index 9480cc576332..baa36180ee00 100644
--- a/synapse/rest/media/v1/thumbnailer.py
+++ b/synapse/rest/media/v1/thumbnailer.py
@@ -39,7 +39,7 @@ class ThumbnailError(Exception):
 
 class Thumbnailer:
 
-    FORMATS = {"image/jpeg": "JPEG", "image/png": "PNG"}
+    FORMATS = {"image/jpeg": "JPEG", "image/png": "PNG", "image/webp": "WEBP"}
 
     @staticmethod
     def set_limits(max_image_pixels: int) -> None: