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Thumbnails: Perform color space transform before resizing (Z#23232101) (#6120)

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Raphael Michel
2026-04-28 15:35:27 +02:00
committed by GitHub
parent 448d2e70d5
commit 921fd801e5
1 changed files with 5 additions and 5 deletions
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10
src/pretix/helpers/thumb.py
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@@ -173,6 +173,7 @@ def create_thumbnail(source, size, formats=None):
# filesystem path, this only works because _open() uses safe_join, which accepts absolute paths if they match the
# expected base dir. For NanoCDN Files, this works because source.name is set to the storage path.
source_rb = default_storage.open(source_name, mode='rb')
source_ext = os.path.splitext(source_name)[1].lower()
image = Image.open(BytesIO(source_rb.read()), formats=formats or settings.PILLOW_FORMATS_QUESTIONS_IMAGE)
try:
@@ -183,11 +184,14 @@ def create_thumbnail(source, size, formats=None):
frames = []
durations = []
for f in ImageSequence.Iterator(image):
if f.mode in ("P", "PA") and source_ext == '.png':
f = f.convert('RGBA')
if f.mode not in ("1", "L", "RGB", "RGBA"):
f = f.convert('RGB')
durations.append(f.info.get("duration", 1000))
frames.append(resize_image(f, size))
image_out = frames[0]
save_kwargs = {}
source_ext = os.path.splitext(source_name)[1].lower()
if source_ext == '.jpg' or source_ext == '.jpeg':
# Yields better file sizes for photos
@@ -211,10 +215,6 @@ def create_thumbnail(source, size, formats=None):
checksum = hashlib.md5(image.tobytes()).hexdigest()
name = checksum + '.' + size.replace('^', 'c') + '.' + target_ext
buffer = BytesIO()
if image_out.mode == "P" and source_ext == '.png':
image_out = image_out.convert('RGBA')
if image_out.mode not in ("1", "L", "RGB", "RGBA"):
image_out = image_out.convert('RGB')
image_out.save(fp=buffer, format=target_ext.upper(), quality=quality, **save_kwargs)
imgfile = ContentFile(buffer.getvalue())