def get_thumbnail(self, size, original_file_source=False, file_mimeype=None):
cache = CacheDriverFactory().get_cache('openslide')
# get thumbnail from cache
thumb = cache.thumbnail_from_cache(self.image_id, size,
settings.DEEPZOOM_FORMAT)
# if thumbnail is not in cache build it ....
if thumb is None:
self.logger.info('No thumbnail loaded from cache, building it')
slide = self._get_openslide_wrapper(original_file_source, file_mimeype)
if slide:
thumb = slide.get_thumbnail((size, size))
# ... and store it into the cache
cache.thumbnail_to_cache(self.image_id, thumb, size,
settings.DEEPZOOM_FORMAT)
else:
self.logger.info('Thumbnail loaded from cache')
return thumb, settings.DEEPZOOM_FORMAT
def get_thumbnail(self, size, original_file_source=False, file_mimeype=None):
self._check_source_type(original_file_source)
cache = CacheDriverFactory().get_cache('omero')
thumbnail = cache.thumbnail_from_cache(self.image_id, size,
settings.DEEPZOOM_FORMAT)
if thumbnail is None:
self.logger.info('No thumbnail loaded from cache, building it')
# we want the thumbnail of the image, not the one of the highest resolution image in fileset
ome_img = self._get_image_object(get_biggest_in_fileset=False)
if ome_img:
if ome_img.getSizeX() >= ome_img.getSizeY():
th_size = (size, )
else:
th_w = size * (float(ome_img.getSizeX()) / ome_img.getSizeY())
th_size = (th_w, size)
thumbnail_buffer = StringIO(ome_img.getThumbnail(size=th_size))
thumbnail = Image.open(thumbnail_buffer)
cache.thumbnail_to_cache(self.image_id, thumbnail, size,
settings.DEEPZOOM_FORMAT)
else:
self.logger.info('Thumbnail loaded from cache')
return thumbnail, settings.DEEPZOOM_FORMAT
