Added script for converting GDS to SVG
Signed-off-by: Grzegorz Latosinski <glatosinski@antmicro.com>
This commit is contained in:
Grzegorz Latosinski
parent
f1d096dac2
commit
7294a3e46e
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# Copyright 2020 SkyWater PDK Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# SPDX-License-Identifier: Apache-2.0
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import os
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import re
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import subprocess
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import argparse
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FATAL_ERROR = re.compile('((Error parsing)|(No such file or directory)|(couldn\'t be read))') # noqa: E501
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READING_REGEX = re.compile('Reading "([^"]*)".')
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debug = True
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superdebug = True
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def _magic_tcl_header(ofile, gdsfile):
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print('#!/bin/env wish', file=ofile)
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print('drc off', file=ofile)
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print('scalegrid 1 2', file=ofile)
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print('cif istyle vendorimport', file=ofile)
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print('gds readonly true', file=ofile)
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print('gds rescale false', file=ofile)
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print('tech unlock *', file=ofile)
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print('cif warning default', file=ofile)
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print('set VDD VPWR', file=ofile)
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print('set GND VGND', file=ofile)
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print('set SUB SUBS', file=ofile)
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print('gds read ' + gdsfile, file=ofile)
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def run_magic(destdir, tcl_path, input_techfile, d="null"):
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cmd = [
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'magic',
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'-nowrapper',
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'-d'+d,
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'-noconsole',
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'-T', input_techfile,
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os.path.abspath(tcl_path)
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]
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with open(tcl_path.replace(".tcl", ".sh"), "w") as f:
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f.write("#!/bin/sh\n")
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f.write(" ".join(cmd))
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mproc = subprocess.run(
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cmd,
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stdin=subprocess.DEVNULL,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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cwd=destdir,
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universal_newlines=True)
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assert mproc.stdout
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max_cellname_width = 0
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output_by_cells = [('', [])]
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fatal_errors = []
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for line in mproc.stdout.splitlines():
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cifwarn = ('CIF file read warning: Input off lambda grid by 1/2; ' +
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'snapped to grid')
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if line.startswith(cifwarn):
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continue
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m = FATAL_ERROR.match(line)
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if m:
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fatal_errors.append(line)
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m = READING_REGEX.match(line)
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if m:
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cell_name = m.group(1)
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max_cellname_width = max(max_cellname_width, len(cell_name))
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output_by_cells.append((cell_name, []))
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output_by_cells[-1][-1].append(line)
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for cell, lines in output_by_cells:
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prefix = "magic " + cell.ljust(max_cellname_width) + ':'
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for line in lines:
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is_error = 'rror' in line
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if superdebug or (debug and is_error):
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print(prefix, line)
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assert not mproc.stderr, mproc.stderr
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if mproc.returncode != 0 or fatal_errors:
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if fatal_errors:
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msg = ['ERROR: Magic had fatal errors in output:'] + fatal_errors
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else:
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msg = ['ERROR: Magic exited with status ' + str(mproc.returncode)]
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msg.append("")
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msg.append(" ".join(cmd))
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msg.append('='*75)
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msg.append(mproc.stdout)
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msg.append('='*75)
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msg.append(destdir)
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msg.append(tcl_path)
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msg.append('-'*75)
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msg.append(msg[0])
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raise SystemError('\n'.join(msg))
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return output_by_cells
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def convert_to_svg(input_gds, input_techfile, output=None):
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input_gds = os.path.abspath(input_gds)
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input_techfile = os.path.abspath(input_techfile)
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destdir, gdsfile = os.path.split(input_gds)
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basename, ext = os.path.splitext(gdsfile)
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if output:
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output_svg = output
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else:
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output_svg = os.path.join(destdir, "{}.svg".format(basename))
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assert not os.path.exists(output_svg), output_svg + " already exists!?"
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tcl_path = os.path.join(destdir, "{}.gds2svg.tcl".format(basename))
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with open(tcl_path, 'w') as ofile:
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_magic_tcl_header(ofile, input_gds)
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ofile.write("load " + basename + "\n")
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ofile.write("box 0 0 0 0\n")
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ofile.write("select top cell\n")
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ofile.write("expand\n")
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ofile.write("view\n")
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ofile.write("select clear\n")
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ofile.write("box position -1000 -1000\n")
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ofile.write("plot svg " + basename + ".tmp1.svg\n")
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ofile.write("quit -noprompt\n")
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run_magic(destdir, tcl_path, input_techfile, " XR")
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tmp1_svg = os.path.join(destdir, "{}.tmp1.svg".format(basename))
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tmp2_svg = os.path.join(destdir, "{}.tmp2.svg".format(basename))
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assert os.path.exists(tmp1_svg), tmp1_svg + " doesn't exist!?"
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os.unlink(tcl_path)
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for i in range(0, 3):
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# Remove the background
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with open(tmp1_svg) as f:
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data = f.read()
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data = re.sub(
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'<rect[^>]* style="[^"]*fill-opacity:1;[^"]*"/>',
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'',
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data
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)
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with open(tmp2_svg, 'w') as f:
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f.write(data)
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# Use inkscape to crop
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retcode = run_inkscape([
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"--verb=FitCanvasToDrawing",
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"--verb=FileSave",
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"--verb=FileClose",
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"--verb=FileQuit",
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tmp2_svg])
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if retcode == 0:
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break
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for i in range(0, 3):
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# Convert back to plain SVG
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retcode = run_inkscape([
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"--export-plain-svg=%s" % (tmp2_svg),
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"--export-background-opacity=1.0",
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tmp2_svg])
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if retcode == 0:
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break
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os.unlink(tmp1_svg)
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# Move into the correct location
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os.rename(tmp2_svg, output_svg)
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print("Created", output_svg)
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def run_inkscape(args):
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p = subprocess.Popen(["inkscape"] + args)
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try:
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p.wait(timeout=60)
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except subprocess.TimeoutExpired:
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print("ERROR: Inkscape timed out! Sending SIGTERM")
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p.terminate()
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try:
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p.wait(timeout=60)
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except subprocess.TimeoutExpired:
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print("ERROR: Inkscape timed out! Sending SIGKILL")
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p.kill()
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p.wait()
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return p.returncode
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument(
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'input_gds',
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help="Path to the input .gds file"
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)
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parser.add_argument(
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'input_tech',
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help="Path to the input .tech file"
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)
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parser.add_argument(
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'--output-svg',
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help='Path to the output .svg file'
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)
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args = parser.parse_args()
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convert_to_svg(args.input_gds, args.input_tech, args.output_svg)
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