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use Image.LANCZOS instead of Image.ANTIALIAS for thumbnail resize (#15876)

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Image.ANTIALIAS is not defined in current pillow releases. Since ANTIALIAS was just using LANCZOS anyways, this is just a cosmetic change, but makes synapse work with most recent pillow releases.

Signed-off-by: Giovanni Harting <539@idlegandalf.com>
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an0nfunc 2023-07-05 10:52:12 +02:00 committed by GitHub
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changelog.d/15876.bugfix Normal file
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@ -0,0 +1 @@
Correctly resize thumbnails with pillow version >=10.

2
synapse/media/thumbnailer.py
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@ -131,7 +131,7 @@ class Thumbnailer:
else:
with self.image:
self.image = self.image.convert("RGB")
return self.image.resize((width, height), Image.ANTIALIAS)
return self.image.resize((width, height), Image.LANCZOS)
def scale(self, width: int, height: int, output_type: str) -> BytesIO:
"""Rescales the image to the given dimensions.