def import_oas(filename, cellname = None, flatten = False):
if filename.lower().endswith('.gds'):
# you are looking for import_gds
retval = pg.import_gds(filename, cellname = cellname, flatten = flatten)
return retval
try:
import klayout.db as pya
except ImportError as err:
err.args = ('[PHIDL] klayout package needed to import OASIS. pip install klayout\n' + err.args[0], ) + err.args[1:]
raise
if not filename.lower().endswith('.oas'): filename += '.oas'
fileroot = os.path.splitext(filename)[0]
tempfilename = fileroot + '-tmp.gds'
layout = pya.Layout()
layout.read(filename)
# We want to end up with one Device. If the imported layout has multiple top cells,
# a new toplevel is created, and they go into the second level
if len(layout.top_cells()) > 1:
topcell = layout.create_cell('toplevel')
rot_DTrans = pya.DTrans.R0
origin = pya.DPoint(0, 0)
for childcell in layout.top_cells():
if childcell == topcell: continue
topcell.insert(pya.DCellInstArray(childcell.cell_index(), pya.DTrans(rot_DTrans, origin)))
else:
topcell = layout.top_cell()
topcell.write(tempfilename)
retval = pg.import_gds(tempfilename, cellname = cellname, flatten = flatten)
os.remove(tempfilename)
return retval
def add_text(
cell: Cell,
text: str,
position: Tuple[int, int] = (0, 0),
align_x: str = "center",
align_y: str = "top",
fontpath: Path = FONT_PATH,
) -> Cell:
"""add text label"""
text = text.upper()
alphabet = load_alphabet(filepath=fontpath)
idbu = 1 / cell.layout().dbu
si = alphabet["A"].dbbox()
x, y = position
w = si.width()
h = si.height()
c = cell.layout().create_cell("TEXT_{}".format(text))
n = len(text)
if align_x == "center":
dx = -(n + 0.5) * w / 2
elif align_x == "right":
dx = -n * w
else:
dx = 0
if align_y == "top":
dy = -h
elif align_y == "center":
dy = -h / 2
else:
dy = 0
for i, char in enumerate(text):
_l = import_cell(cell.layout(), alphabet[char])
_transform = pya.DTrans((i * w + dx) * idbu, dy * idbu)
label = pya.CellInstArray(_l.cell_index(), _transform)
c.insert(label)
cell.insert(pya.CellInstArray(c.cell_index(), pya.DTrans(x, y)))
return c
def draw(self, cell, layer):
""" Draws this port on cell's layer using klayout.db"""
if self.name.startswith("el"):
pin_length = self.width
else:
# port is optical
pin_length = max(2, self.width / 10)
ex = self.direction
# Place a Path around the port pointing towards its exit
port_path = kdb.DPath(
[
self.position - 0.5 * pin_length * ex,
self.position + 0.5 * pin_length * ex,
],
self.width,
)
cell.shapes(layer).insert(port_path)
# Place a small arrow around the tip of the port
from zeropdk.layout.geometry import rotate90
ey = rotate90(ex)
port_tip = kdb.DSimplePolygon(
[
self.position + 0.5 * pin_length * ex,
self.position + 0.4 * pin_length * ex + 0.1 * pin_length * ey,
self.position + 0.4 * pin_length * ex - 0.1 * pin_length * ey,
]
)
cell.shapes(layer).insert(port_tip)
# pin_rectangle = rectangle(self.position, self.width,
# pin_length, ex, ey)
# cell.shapes(layer).insert(pin_rectangle)
# Place a text object annotating the name of the port
cell.shapes(layer).insert(
kdb.DText(
self.name,
kdb.DTrans(kdb.DTrans.R0, self.position.x, self.position.y),
min(pin_length, 20),
0,
)
)
return self
def place_cell(
parent_cell,
pcell,
ports_dict,
placement_origin,
relative_to=None,
transform_into=False,
):
""" Places an pya cell and return ports with updated positions
Args:
parent_cell: cell to place into
pcell, ports_dict: result of KLayoutPCell.pcell call
placement_origin: pya.Point object to be used as origin
relative_to: port name
the cell is placed so that the port is located at placement_origin
transform_into:
if used with relative_into, transform the cell's coordinate system
so that its origin is in the given port.
Returns:
ports(dict): key:port.name, value: geometry.Port with positions relative to parent_cell's origin
"""
ports = ports_dict
cell = pcell
port_offset = placement_origin
if relative_to is not None:
offset = ports[relative_to].position
port_offset = placement_origin - offset
if transform_into:
# print(type(pcell))
offset_transform = kdb.DTrans(kdb.DTrans.R0, -offset)
for instance in cell.each_inst():
instance.transform(offset_transform)
cell.transform_into(offset_transform)
else:
placement_origin = placement_origin - offset
parent_cell.insert_cell(cell, placement_origin, 0)
new_ports = deepcopy(ports)
for port in new_ports.values():
port.position += port_offset
return new_ports
def rodGetObj(i):
print "rodGetObject: " + str(i)
if i in rodsByName:
return rodsByName[i]
s = i.split("/")
if len(s) > 1:
tx = []
print "rod subobject query: " + str(s)
cmap = rodsByName
inst = rodsByName[s[0]]
dbox = None
got_shape = False
for e in s:
e = cmap[e]
cell = e['_shapes'][0]
if isinstance(cell, db.Instance):
cmap = rod_map[cell.cell.basic_name()]
tx.append(cell.dtrans)
else:
got_shape = True
dbox = e['_shapes'][0].dbbox()
#accumulate the transforms
if not got_shape:
print dbox
dbox.p1 = db.DPoint.new(
0, 0) #If only have a cell, then all stuff relative to origin
dbox.p2 = dbox.p1
total = db.DTrans()
for t in tx:
total = total * t
if not dbox:
write()
exit()
dbox = total.trans(dbox)
obj = createObj(dbox=dbox)
obj['_slaves'].append(inst)
inst['_masters'].append(obj)
obj['_transform'] = total
rodsByName[i] = obj
return obj
write()
assert (False)
exit(0)
print "****************getObject failed"
return None
def wrapper_draw(self, cell):
layout = cell.layout()
try:
layer_map_dict[layout]
except KeyError:
layer_map_dict[layout] = pya.LayerMap()
# Adding the dbu of the layout in the hash (bit us in the butt last time)
short_hash_pcell = produce_hash(self,
extra=(layout.dbu, extra_hash))
# cache paths
cache_fname = f"cache_{self.__class__.__qualname__}_{short_hash_pcell}"
cache_fname_gds = cache_fname + ".gds"
cache_fname_pkl = cache_fname + ".klayout.pkl"
os.makedirs(cache_dir, mode=0o775, exist_ok=True)
cache_fpath_gds = os.path.join(cache_dir, cache_fname_gds)
cache_fpath_pkl = os.path.join(cache_dir, cache_fname_pkl)
if os.path.isfile(cache_fpath_gds) and os.path.isfile(
cache_fpath_pkl):
with open(cache_fpath_pkl, "rb") as file:
ports, read_short_hash_pcell, cellname = pickle.load(file) # pylint: disable=unused-variable
logger.debug(
f"Reading from cache: {cache_fname}: {cellname}, {ports}")
print("r", end="", flush=True)
if not layout.has_cell(cache_fname):
read_layout(layout,
cache_fpath_gds,
disambiguation_name=cellname)
retrieved_cell = layout.cell(cache_fname)
cell.insert(
pya.DCellInstArray(
retrieved_cell.cell_index(),
pya.DTrans(pya.DTrans.R0, pya.DPoint(0, 0)),
))
# cell.move_tree(retrieved_cell)
else:
if layout.has_cell(cache_fname):
logger.warning(
f"WARNING: {cache_fname_gds} does not exist but {cache_fname} is in layout."
)
# populating .gds and .pkl
empty_layout = pya.Layout()
empty_layout.dbu = layout.dbu
empty_cell = empty_layout.create_cell(cell.name)
filled_cell, ports = draw(self, empty_cell)
logger.debug(
f"Writing to cache: {cache_fname}: {filled_cell.name}, {ports}"
)
print("w", end="", flush=True)
cellname, filled_cell.name = filled_cell.name, cache_fname
# There can be duplicate cell names in subcells here.
# We are saving a list of them inside a property named CACHE_PROP_ID
# So we need to allow the properties to be saved inside the gds file (incompatible with the GDS2 standard)
save_options = pya.SaveLayoutOptions()
save_options.gds2_write_file_properties = True
empty_layout.write(cache_fpath_gds, save_options)
with open(cache_fpath_pkl, "wb") as file:
pickle.dump((ports, short_hash_pcell, cellname), file)
# Make sure we delete the empty_layout to not grow
# helps debug
layer_map_dict.pop(empty_layout, None)
del empty_layout
assert not layout.has_cell(cache_fname)
read_layout(layout,
cache_fpath_gds,
disambiguation_name=cellname)
retrieved_cell = layout.cell(cache_fname)
cell.insert(
pya.DCellInstArray(
retrieved_cell.cell_index(),
pya.DTrans(pya.DTrans.R0, pya.DPoint(0, 0)),
))
return cell, ports
def wrapper_draw(self, cell):
global layer_map_dict
layout = cell.layout()
try:
layer_map_dict[layout]
except KeyError:
layer_map_dict[layout] = pya.LayerMap()
# Adding the dbu of the layout in the hash (bit us in the butt last time)
short_hash_pcell = produce_hash(self, extra=(layout.dbu, extra_hash))
# cache paths
cache_fname = f"cache_{self.__class__.__qualname__}_{short_hash_pcell}"
cache_fname_gds = cache_fname + ".gds"
cache_fname_pkl = cache_fname + ".klayout.pkl"
os.makedirs(cache_dir, mode=0o775, exist_ok=True)
cache_fpath_gds = os.path.join(cache_dir, cache_fname_gds)
cache_fpath_pkl = os.path.join(cache_dir, cache_fname_pkl)
if os.path.isfile(cache_fpath_gds) and os.path.isfile(cache_fpath_pkl):
with open(cache_fpath_pkl, "rb") as file:
ports, read_short_hash_pcell, cellname = pickle.load(file)
if debug:
print(f"Reading from cache: {cache_fname}: {cellname}, {ports}")
else:
print("r", end="", flush=True)
if not layout.has_cell(cache_fname):
read_layout(layout, cache_fpath_gds)
retrieved_cell = layout.cell(cache_fname)
cell.insert(
pya.DCellInstArray(
retrieved_cell.cell_index(),
pya.DTrans(pya.DTrans.R0, pya.DPoint(0, 0)),
)
)
# cell.move_tree(retrieved_cell)
else:
if layout.has_cell(cache_fname):
print(
f"WARNING: {cache_fname_gds} does not exist but {cache_fname} is in layout."
)
# populating .gds and .pkl
empty_layout = pya.Layout()
empty_layout.dbu = layout.dbu
empty_cell = empty_layout.create_cell(cell.name)
filled_cell, ports = draw(self, empty_cell)
if debug:
print(
f"Writing to cache: {cache_fname}: {filled_cell.name}, {ports}"
)
else:
print("w", end="", flush=True)
cellname, filled_cell.name = filled_cell.name, cache_fname
filled_cell.write(cache_fpath_gds)
with open(cache_fpath_pkl, "wb") as file:
pickle.dump((ports, short_hash_pcell, cellname), file)
# Make sure we delete the empty_layout to not grow
# helps debug
layer_map_dict.pop(empty_layout, None)
del empty_layout
assert not layout.has_cell(cache_fname)
read_layout(layout, cache_fpath_gds)
retrieved_cell = layout.cell(cache_fname)
cell.insert(
pya.DCellInstArray(
retrieved_cell.cell_index(),
pya.DTrans(pya.DTrans.R0, pya.DPoint(0, 0)),
)
)
return cell, ports
