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Always use builtin JPEG thumbnails

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This commit is contained in:
Joel Collins 2020-10-27 14:05:24 +00:00
parent 09849ce064
commit 10d264c526
1 changed files with 6 additions and 19 deletions
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25
openflexure_microscope/captures/capture.py
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@ -16,7 +16,6 @@ from openflexure_microscope.config import JSONEncoder
PIL_FORMATS = ["JPG", "JPEG", "PNG", "TIF", "TIFF"]
EXIF_FORMATS = ["JPG", "JPEG", "TIF", "TIFF"]
THUMBNAIL_SIZE = (200, 150)
def pull_usercomment_dict(filepath):
@ -145,9 +144,6 @@ class CaptureObject(object):
# List for storing tags
self.tags = []
# Thumbnail (populated only for PIL captures)
self.thumb_bytes = None
def write(self, s):
logging.debug("Writing to %s", self)
self.stream.write(s)
@ -349,21 +345,12 @@ class CaptureObject(object):
"""
Returns a thumbnail of the capture data, for supported image formats.
"""
# If no thumbnail exists, try and make one
if not self.thumb_bytes:
logging.info("Building thumbnail")
self.thumb_bytes = io.BytesIO()
if self.format.upper() in PIL_FORMATS:
im = Image.open(self.data)
im.thumbnail(THUMBNAIL_SIZE)
im.save(self.thumb_bytes, self.format)
self.thumb_bytes.seek(0)
else:
self.thumb_bytes.seek(0)
# Copy the buffer, to avoid closing the file
data = io.BytesIO(self.thumb_bytes.getbuffer())
return data
exif_dict = piexif.load(self.file)
thumbnail = exif_dict.pop("thumbnail")
if thumbnail:
return io.BytesIO(thumbnail)
# If no thumbnail exists, serve the full image
return self.data.getvalue()
def save(self) -> None:
"""Write stream to file, and save/update metadata file"""