Added script for converting GDS to SVG

Signed-off-by: Grzegorz Latosinski <glatosinski@antmicro.com>
This commit is contained in:
Grzegorz Latosinski 2020-11-19 12:47:00 +01:00
parent f1d096dac2
commit 7294a3e46e
1 changed files with 201 additions and 0 deletions

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright 2020 SkyWater PDK Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0
import os
import re
import subprocess
import argparse
FATAL_ERROR = re.compile('((Error parsing)|(No such file or directory)|(couldn\'t be read))') # noqa: E501
READING_REGEX = re.compile('Reading "([^"]*)".')
debug = True
superdebug = True
def _magic_tcl_header(ofile, gdsfile):
print('#!/bin/env wish', file=ofile)
print('drc off', file=ofile)
print('scalegrid 1 2', file=ofile)
print('cif istyle vendorimport', file=ofile)
print('gds readonly true', file=ofile)
print('gds rescale false', file=ofile)
print('tech unlock *', file=ofile)
print('cif warning default', file=ofile)
print('set VDD VPWR', file=ofile)
print('set GND VGND', file=ofile)
print('set SUB SUBS', file=ofile)
print('gds read ' + gdsfile, file=ofile)
def run_magic(destdir, tcl_path, input_techfile, d="null"):
cmd = [
'magic',
'-nowrapper',
'-d'+d,
'-noconsole',
'-T', input_techfile,
os.path.abspath(tcl_path)
]
with open(tcl_path.replace(".tcl", ".sh"), "w") as f:
f.write("#!/bin/sh\n")
f.write(" ".join(cmd))
mproc = subprocess.run(
cmd,
stdin=subprocess.DEVNULL,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
cwd=destdir,
universal_newlines=True)
assert mproc.stdout
max_cellname_width = 0
output_by_cells = [('', [])]
fatal_errors = []
for line in mproc.stdout.splitlines():
cifwarn = ('CIF file read warning: Input off lambda grid by 1/2; ' +
'snapped to grid')
if line.startswith(cifwarn):
continue
m = FATAL_ERROR.match(line)
if m:
fatal_errors.append(line)
m = READING_REGEX.match(line)
if m:
cell_name = m.group(1)
max_cellname_width = max(max_cellname_width, len(cell_name))
output_by_cells.append((cell_name, []))
output_by_cells[-1][-1].append(line)
for cell, lines in output_by_cells:
prefix = "magic " + cell.ljust(max_cellname_width) + ':'
for line in lines:
is_error = 'rror' in line
if superdebug or (debug and is_error):
print(prefix, line)
assert not mproc.stderr, mproc.stderr
if mproc.returncode != 0 or fatal_errors:
if fatal_errors:
msg = ['ERROR: Magic had fatal errors in output:'] + fatal_errors
else:
msg = ['ERROR: Magic exited with status ' + str(mproc.returncode)]
msg.append("")
msg.append(" ".join(cmd))
msg.append('='*75)
msg.append(mproc.stdout)
msg.append('='*75)
msg.append(destdir)
msg.append(tcl_path)
msg.append('-'*75)
msg.append(msg[0])
raise SystemError('\n'.join(msg))
return output_by_cells
def convert_to_svg(input_gds, input_techfile, output=None):
input_gds = os.path.abspath(input_gds)
input_techfile = os.path.abspath(input_techfile)
destdir, gdsfile = os.path.split(input_gds)
basename, ext = os.path.splitext(gdsfile)
if output:
output_svg = output
else:
output_svg = os.path.join(destdir, "{}.svg".format(basename))
assert not os.path.exists(output_svg), output_svg + " already exists!?"
tcl_path = os.path.join(destdir, "{}.gds2svg.tcl".format(basename))
with open(tcl_path, 'w') as ofile:
_magic_tcl_header(ofile, input_gds)
ofile.write("load " + basename + "\n")
ofile.write("box 0 0 0 0\n")
ofile.write("select top cell\n")
ofile.write("expand\n")
ofile.write("view\n")
ofile.write("select clear\n")
ofile.write("box position -1000 -1000\n")
ofile.write("plot svg " + basename + ".tmp1.svg\n")
ofile.write("quit -noprompt\n")
run_magic(destdir, tcl_path, input_techfile, " XR")
tmp1_svg = os.path.join(destdir, "{}.tmp1.svg".format(basename))
tmp2_svg = os.path.join(destdir, "{}.tmp2.svg".format(basename))
assert os.path.exists(tmp1_svg), tmp1_svg + " doesn't exist!?"
os.unlink(tcl_path)
for i in range(0, 3):
# Remove the background
with open(tmp1_svg) as f:
data = f.read()
data = re.sub(
'<rect[^>]* style="[^"]*fill-opacity:1;[^"]*"/>',
'',
data
)
with open(tmp2_svg, 'w') as f:
f.write(data)
# Use inkscape to crop
retcode = run_inkscape([
"--verb=FitCanvasToDrawing",
"--verb=FileSave",
"--verb=FileClose",
"--verb=FileQuit",
tmp2_svg])
if retcode == 0:
break
for i in range(0, 3):
# Convert back to plain SVG
retcode = run_inkscape([
"--export-plain-svg=%s" % (tmp2_svg),
"--export-background-opacity=1.0",
tmp2_svg])
if retcode == 0:
break
os.unlink(tmp1_svg)
# Move into the correct location
os.rename(tmp2_svg, output_svg)
print("Created", output_svg)
def run_inkscape(args):
p = subprocess.Popen(["inkscape"] + args)
try:
p.wait(timeout=60)
except subprocess.TimeoutExpired:
print("ERROR: Inkscape timed out! Sending SIGTERM")
p.terminate()
try:
p.wait(timeout=60)
except subprocess.TimeoutExpired:
print("ERROR: Inkscape timed out! Sending SIGKILL")
p.kill()
p.wait()
return p.returncode
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument(
'input_gds',
help="Path to the input .gds file"
)
parser.add_argument(
'input_tech',
help="Path to the input .tech file"
)
parser.add_argument(
'--output-svg',
help='Path to the output .svg file'
)
args = parser.parse_args()
convert_to_svg(args.input_gds, args.input_tech, args.output_svg)