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Merge remote-tracking branch 'upstream/release-v1.45'

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This commit is contained in:
Tulir Asokan 2021-10-12 13:54:46 +03:00
commit 80adb0a6ca
196 changed files with 4122 additions and 2177 deletions
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21
synapse/rest/media/v1/thumbnailer.py
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@ -61,9 +61,19 @@ class Thumbnailer:
self.transpose_method = None
try:
# We don't use ImageOps.exif_transpose since it crashes with big EXIF
image_exif = self.image._getexif()
#
# Ignore safety: Pillow seems to acknowledge that this method is
# "private, experimental, but generally widely used". Pillow 6
# includes a public getexif() method (no underscore) that we might
# consider using instead when we can bump that dependency.
#
# At the time of writing, Debian buster (currently oldstable)
# provides version 5.4.1. It's expected to EOL in mid-2022, see
# https://wiki.debian.org/DebianReleases#Production_Releases
image_exif = self.image._getexif() # type: ignore
if image_exif is not None:
image_orientation = image_exif.get(EXIF_ORIENTATION_TAG)
assert isinstance(image_orientation, int)
self.transpose_method = EXIF_TRANSPOSE_MAPPINGS.get(image_orientation)
except Exception as e:
# A lot of parsing errors can happen when parsing EXIF
@ -76,7 +86,10 @@ class Thumbnailer:
A tuple containing the new image size in pixels as (width, height).
"""
if self.transpose_method is not None:
self.image = self.image.transpose(self.transpose_method)
# Safety: `transpose` takes an int rather than e.g. an IntEnum.
# self.transpose_method is set above to be a value in
# EXIF_TRANSPOSE_MAPPINGS, and that only contains correct values.
self.image = self.image.transpose(self.transpose_method) # type: ignore[arg-type]
self.width, self.height = self.image.size
self.transpose_method = None
# We don't need EXIF any more
@ -101,7 +114,7 @@ class Thumbnailer:
else:
return (max_height * self.width) // self.height, max_height
def _resize(self, width: int, height: int) -> Image:
def _resize(self, width: int, height: int) -> Image.Image:
# 1-bit or 8-bit color palette images need converting to RGB
# otherwise they will be scaled using nearest neighbour which
# looks awful.
@ -151,7 +164,7 @@ class Thumbnailer:
cropped = scaled_image.crop((crop_left, 0, crop_right, height))
return self._encode_image(cropped, output_type)
def _encode_image(self, output_image: Image, output_type: str) -> BytesIO:
def _encode_image(self, output_image: Image.Image, output_type: str) -> BytesIO:
output_bytes_io = BytesIO()
fmt = self.FORMATS[output_type]
if fmt == "JPEG":