def get_tile(self, level, column, row, original_file_source=False, file_mimetype=None):
cache = CacheDriverFactory().get_cache('openslide')
cache_params = {
'image_id': self.image_id,
'level': level,
'column': column,
'row': row,
'tile_size': settings.DEEPZOOM_TILE_SIZE,
'image_format': settings.DEEPZOOM_FORMAT
}
if cache_params['image_format'].lower() == 'jpeg':
cache_params['image_quality'] = settings.DEEPZOOM_JPEG_QUALITY
# get tile from cache
tile = cache.tile_from_cache(**cache_params)
# if tile is not in cache build id ...
if tile is None:
slide = self._get_deepzoom_wrapper(original_file_source, file_mimetype)
if slide:
dzi_tile = slide.get_tile(level, (column, row))
tile_buffer = StringIO()
tile_conf = {
'format': settings.DEEPZOOM_FORMAT
}
if tile_conf['format'].lower() == 'jpeg':
tile_conf['quality'] = settings.DEEPZOOM_JPEG_QUALITY
dzi_tile.save(tile_buffer, **tile_conf)
tile = Image.open(tile_buffer)
# ... and store it into the cache
cache_params['image_obj'] = tile
cache.tile_to_cache(**cache_params)
return tile, settings.DEEPZOOM_FORMAT
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_tile(self, level, column, row, original_file_source=False, file_mimetype=None):
self._check_source_type(original_file_source)
cache = CacheDriverFactory().get_cache('omero')
cache_params = {
'image_id': self.image_id,
'level': level,
'column': column,
'row': row,
'tile_size': settings.DEEPZOOM_TILE_SIZE,
'image_format': settings.DEEPZOOM_FORMAT
}
if cache_params['image_format'].lower() == 'jpeg':
cache_params['image_quality'] = settings.DEEPZOOM_JPEG_QUALITY
tile = cache.tile_from_cache(**cache_params)
if tile is None:
ome_img = self._get_image_object()
ome_level = self._get_best_downscale_level(level, ome_img)
tile = self._get_ome_tile(ome_img, ome_level, level, row=column, column=row)
cache_params['image_obj'] = tile
cache.tile_to_cache(**cache_params)
return tile, 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
