Tile.py 文件源码

def unpack(self):
        """Unpacks a 4bpp planar tile.

        Returns a byte() of pixel values.
        """
        tile_fmt = Struct(32 * 'c')
        tile_iter = tile_fmt.iter_unpack(self._tile_data)

        tiles = [self._bitplanes_to_tile(b''.join(tile)) for tile in tile_iter]
        return b''.join(tiles)