113 lines
3.6 KiB
Python
113 lines
3.6 KiB
Python
#!/usr/bin/env python3
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# coding=utf-8
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#
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# Copyright (C) 2022 Jonathan Neuhauser (jonathan.neuhauser@outlook.com)
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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"""Parser for HP/GL2 Documents (includes ordinary HPGL)"""
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import pyparsing as pp
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from inkex.base import SvgOutputMixin
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import inkex
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from inkex.localization import inkex_gettext as _
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from hpgl_input_sm import HPGLStateMachine
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from hpgl_parser import build_parser
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class Hpgl2Input(inkex.InputExtension):
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"""InputExtension to import HP/GL2 documents."""
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def add_arguments(self, pars):
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pars.add_argument(
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"--width", type=float, default=8, help="Width of the picture frame [in]"
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)
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pars.add_argument(
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"--height", type=float, default=10, help="Height of the picture frame [in]"
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)
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pars.add_argument(
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"--resolution", type=float, default=1016.0, help="Resolution (plu/in)"
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)
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pars.add_argument(
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"--bake-transforms",
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type=inkex.Boolean,
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default=True,
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help=(
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"Bake transforms"
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"(disabling is helpful for debugging IP/IR/SC commands)"
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),
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)
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pars.add_argument(
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"--break-apart",
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type=inkex.Boolean,
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default=True,
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help="Break apart subpaths",
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)
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def load(self, stream):
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"""Load the document, making sure that we operate on a decoded string"""
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res = stream.read()
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if isinstance(res, str):
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return res
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return res.decode()
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def effect(self):
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# interpret HPGL data
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doc: inkex.SvgDocumentElement = SvgOutputMixin.get_template(
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width=self.options.width * 25.4,
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height=self.options.height * 25.4,
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unit="mm",
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)
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layer = doc.getroot().add(inkex.Layer())
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plu_to_svg = inkex.Transform(
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scale=(
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0.025 / self.options.resolution * 1016,
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-0.025 / self.options.resolution * 1016,
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),
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translate=(0, self.options.height * 25.4),
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)
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layer.transform = plu_to_svg
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document_parser = build_parser(HPGLStateMachine(layer, self.options))
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try:
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result = document_parser.parse_string(self.document, parse_all=True)
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# bake in the transforms
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if self.options.bake_transforms:
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layer.bake_transforms_recursively()
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unknown = result.get("u")
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if unknown:
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inkex.errormsg(
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_(
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"Unsupported commands encountered. "
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"The following commands were ignored:"
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)
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)
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inkex.errormsg(unknown)
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except pp.ParseException as parse_err:
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inkex.errormsg(parse_err.explain())
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# deliver document to inkscape
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self.document = doc
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if __name__ == "__main__":
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Hpgl2Input().run()
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