def tile2WebPNG(self, xdim, ydim, tile):
"""Create PNG Images and write to cache for the specified tile"""
# Check if it is mcfc tile
if self.colors is not None:
return mcfcPNG(tile, self.colors, enhancement=4.0)
# If it is not a mcfc tile
else:
ch = self.ds.getChannelObj(self.channels[0])
# write it as a png file
if ch.getChannelType() in IMAGE_CHANNELS + TIMESERIES_CHANNELS:
if ch.getChannelDataType() in DTYPE_uint8:
return Image.frombuffer ( 'L', [xdim,ydim], tile.flatten(), 'raw', 'L', 0, 1 )
elif ch.getChannelDataType() in DTYPE_uint16:
if ch.getWindowRange() != [0,0]:
tile = np.uint8(tile)
return Image.frombuffer ( 'L', [xdim,ydim], tile.flatten(), 'raw', 'L', 0, 1 )
else:
outimage = Image.frombuffer ( 'I;16', [xdim,ydim], tile.flatten(), 'raw', 'I;16', 0, 1)
return outimage.point(lambda i:i*(1./256)).convert('L')
elif ch.getChannelDataType() in DTYPE_uint32 :
return Image.fromarray( tile[0,:,:], 'RGBA')
elif ch.getChannelType() in ANNOTATION_CHANNELS:
tile = tile[0,:]
ndlib.recolor_ctype(tile, tile)
return Image.frombuffer ( 'RGBA', [xdim,ydim], tile.flatten(), 'raw', 'RGBA', 0, 1 )
else :
logger.warning("Datatype not yet supported".format(ch.channel_type))
def fetch (self):
"""Retrieve the tile from the cache or load the cache and return"""
try:
# open file and return
f = open(self.filename)
self.db.touch (self.tkey)
return f.read()
except IOError:
pass
try:
self.initForFetch()
except OOBException:
logger.warning("OOB request. Returning black tile. url={}".format(self.tile_url))
img = Image.new("L", (settings.TILESIZE, settings.TILESIZE))
fileobj = cStringIO.StringIO()
img.save(fileobj, "PNG")
fileobj.seek(0)
return fileobj.read()
from tasks import fetchcube
# check if there is S3 backend and do the calls accordingly
if self.ds.getS3Backend():
s3_backend = s3io.S3IO(self.ds, self.channels)
cubedata = s3_backend.getCutout(self.cuboid_url)
tile_data = cubedata[:, self.zslab_offset, : ,:]
# fetchcube(self.token, self.slice_type, self.channels, self.colors, self.cuboid_url, cubedata)
fetchcube.delay (self.token, self.slice_type, self.channels, self.colors, self.cuboid_url, cubedata)
ch = self.ds.getChannelObj(self.channels[0])
# checking the channel type to process the data correctly
if self.colors:
img = mcfc.mcfcPNG (tile_data, self.colors)
elif ch.getChannelType() in IMAGE_CHANNELS + TIMESERIES_CHANNELS:
if ch.getChannelDataType() in DTYPE_uint8:
img = Image.frombuffer('L', tile_data.shape[1:][::-1], tile_data.flatten(), 'raw', 'L', 0, 1)
elif ch.getChannelDataType() in DTYPE_uint16:
if ch.getWindowRange() != [0,0]:
tile_data = np.uint8(tile_data)
img = Image.frombuffer('L', tile_data.shape[1:][::-1], tile_data.flatten(), 'raw', 'L', 0, 1)
else:
img = Image.frombuffer ( 'I;16', tile_data.shape[1:][::-1], tile_data.flatten(), 'raw', 'I;16', 0, 1)
img.point(lambda i:i*(1./256)).convert('L')
elif ch.getChannelDataType() in DTYPE_uint32 :
img = Image.fromarray( tile_data[0,:,:], 'RGBA')
elif ch.getChannelType() in ANNOTATION_CHANNELS:
tile_data = tile_data[0,:]
ndlib.recolor_ctype(tile_data, tile_data)
img = Image.frombuffer('RGBA', tile_data.shape[1:][::-1], tile_data.flatten(), 'raw', 'RGBA', 0, 1)
fileobj = cStringIO.StringIO()
img.save ( fileobj, "PNG" )
fileobj.seek(0)
return fileobj.read()
else:
# call the celery process to fetch the url
#fetchurl (self.token, self.slice_type, self.channels, self.colors, self.cuboid_url)
fetchcube.delay (self.token, self.slice_type, self.channels, self.colors, self.cuboid_url)
# fetchcube (self.token, self.slice_type, self.channels, self.colors, self.cuboid_url)
logger.warning("Tile fetch {}".format(self.tile_url))
return getURL(self.tile_url).read()
