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Thumbnail webp images as webp to avoid losing transparency

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This commit is contained in:
Tulir Asokan 2023-02-12 14:39:07 +02:00
parent 0de822af4d
commit 5e7ff45534
2 changed files with 7 additions and 5 deletions
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10
synapse/config/repository.py
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@ -54,10 +54,8 @@ THUMBNAIL_SIZE_YAML = """\
THUMBNAIL_SUPPORTED_MEDIA_FORMAT_MAP = {
"image/jpeg": "jpeg",
"image/jpg": "jpeg",
"image/webp": "jpeg",
# Thumbnails can only be jpeg or png. We choose png thumbnails for gif
# because it can have transparency.
"image/gif": "png",
"image/webp": "webp",
"image/gif": "webp",
"image/png": "png",
}
@ -109,6 +107,10 @@ 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!"

2
synapse/media/thumbnailer.py
View file

@ -47,7 +47,7 @@ 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: