def __process_tilelevel0(self, media_id):
"""Create the (0,0,0) tile, and save it to the TileStore using the
media indentifier media_id.
__process_tilelevel0(string) -> None
Precondition: tile_id is valid
"""
self.__process_tilelevel1((media_id, 1, 0, 0))
self.__process_tilelevel1((media_id, 1, 0, 1))
tile0 = Image.open(TileStore.get_tile_path(
(media_id, 1, 0, 0), filext=self.filext)) \
.resize((128,128), Image.BILINEAR)
tile1 = Image.open(TileStore.get_tile_path(
(media_id, 1, 0, 1), filext=self.filext)) \
.resize((128,128), Image.BILINEAR)
tile = Image.new('RGB', (256,128))
tile.paste(tile0, (0, 0, 128, 128))
tile.paste(tile1, (128, 0, 256, 128))
filename = TileStore.get_tile_path(
(media_id, 0, 0, 0), True, filext=self.filext)
tile.save(filename)
def __process_tilelevel1(self, tile_id):
"""Create the tile identified by tile_id by merging the four sub-tiles
and resizing to 256x256, and save it to the TileStore.
__process_tilelevel1(tuple<string,int,int,int>) -> None
Precondition: the tilelevel component of tile_id is 1
Precondition: tile_id is valid
"""
media_id, tilelevel, row, col = tile_id
self.__process_big_tile((media_id, 1, 0, col))
tile00 = Image.open(TileStore.get_tile_path(
(media_id, 2, 0, 0 + col*2), filext=self.filext)) \
.resize((128,128), Image.BILINEAR)
tile01 = Image.open(TileStore.get_tile_path(
(media_id, 2, 0, 1 + col*2), filext=self.filext)) \
.resize((128,128), Image.BILINEAR)
tile10 = Image.open(TileStore.get_tile_path(
(media_id, 2, 1, 0 + col*2), filext=self.filext)) \
.resize((128,128), Image.BILINEAR)
tile11 = Image.open(TileStore.get_tile_path(
(media_id, 2, 1, 1 + col*2), filext=self.filext)) \
.resize((128,128), Image.BILINEAR)
tile = Image.new('RGB', (256,256))
tile.paste(tile00, (0, 0, 128, 128))
tile.paste(tile01, (128, 0, 256, 128))
tile.paste(tile10, (0, 128, 128, 256))
tile.paste(tile11, (128, 128, 256, 256))
filename = TileStore.get_tile_path(
tile_id, True, filext=self.filext)
tile.save(filename)
def __savetile(self, tile, tilelevel, row, col):
"""Save the given tile to disk.
__save(Tile, int, int, int) -> None
"""
tile_id = (self.__media_id, tilelevel, row, col)
filename = TileStore.get_tile_path(
tile_id, True, self.__outpath, self.__filext)
tile.save(filename)
self.__progress += 1.0/self.__numtiles
self.__logger.info("%3d%% tiled", int(self.__progress*100))
def _load(self, tile_id):
filename = TileStore.get_tile_path(
tile_id, True, filext=self.filext)
if not os.path.exists(filename):
## tile has not been retrieved yet
self._load_dynamic(tile_id, filename)
try:
return QtGui.QImage(filename)
except Exception:
self._logger.exception("error loading tile, "
"assuming it is unavailable")
return None
def _load(self, tile_id):
media_id, tilelevel, row, col = tile_id
maxtilelevel = TileStore.get_metadata(media_id, 'maxtilelevel')
if tilelevel > maxtilelevel:
return None
filename = TileStore.get_tile_path(tile_id)
try:
tile = Image.open(filename)
tile.load()
return tile
except IOError:
return None
Precondition: tile_id is valid
"""
media_id, tilelevel, row, col = big_tile_id
tmpfile = self.__download(big_tile_id)
try:
big_tile = Image.open(tmpfile)
except Exception, e:
self._logger.exception("unable to load %s" % tmpfile)
else:
for x in [0,1]:
for y in [0,1]:
tile= big_tile.crop((x*256, y*256, (x+1)*256, (y+1)*256))
tile_id = (media_id, tilelevel+1, row*2 + y, col*2 + x)
filename = TileStore.get_tile_path(
tile_id, True, filext=self.filext)
tile.save(filename)
try:
os.unlink(tmpfile)
except:
self._logger.exception("unable to unlink temporary file "
"'%s'" % tmpfile)
def __process_tilelevel1(self, tile_id):
"""Create the tile identified by tile_id by merging the four sub-tiles
and resizing to 256x256, and save it to the TileStore.
__process_tilelevel1(tuple<string,int,int,int>) -> None