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#!/usr/bin/env python
# coding=utf-8
'''
hpgl_input.py - input a HP Graphics Language file
Copyright (C) 2013 Sebastian Wüst, sebi@timewaster.de, http://www.timewasters-place.com/
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
'''
# standard library
from StringIO import StringIO
# local library
import inkex
inkex.localize()
# parse options
parser = inkex.optparse.OptionParser(usage="usage: %prog [options] HPGLfile", option_class=inkex.InkOption)
parser.add_option("-a", "--resolutionX",
action="store", type="float",
dest="resolutionX", default=1016.0,
help="Resolution X (dpi)")
parser.add_option("-b", "--resolutionY",
action="store", type="float",
dest="resolutionY", default=1016.0,
help="Resolution Y (dpi)")
parser.add_option("-c", "--showMovements",
action="store", type="inkbool",
dest="showMovements", default="FALSE",
help="Show Movements between paths")
(options, args) = parser.parse_args(inkex.sys.argv[1:])
# global vars
scaleX = options.resolutionX / 90.0 # dots/inch to dots/pixels
scaleY = options.resolutionY / 90.0 # dots/inch to dots/pixels
documentWidth = 210.0 * 3.5433070866 # 210mm to pixels
documentHeight = 297.0 * 3.5433070866 # 297mm to pixels
hasUnknownCommands = False
def getData(file):
# read file (read only one line, there should not be more than one line)
stream = open(file, 'r')
data = stream.readline().strip()
data = data.split(';')
if len(data) < 2:
inkex.errormsg(_("No HPGL data found."))
return False
if data[-1].strip() == '':
data.pop()
return data
def getCoordinates(coord):
# process coordinates
(x, y) = coord.split(',')
x = float(x) / scaleX; # convert to pixels coordinate system
y = documentHeight - float(y) / scaleY; # convert to pixels coordinate system
return (x, y)
# prepare document
doc = inkex.etree.parse(StringIO('<svg xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" width="%s" height="%s"></svg>' % (documentWidth, documentHeight)))
layerDrawing = inkex.etree.SubElement(doc.getroot(), 'g', {inkex.addNS('groupmode','inkscape'):'layer', inkex.addNS('label','inkscape'):'Drawing'})
if options.showMovements:
layerMovements = inkex.etree.SubElement(doc.getroot(), 'g', {inkex.addNS('groupmode','inkscape'):'layer', inkex.addNS('label','inkscape'):'Movements'})
# load data
data = getData(args[0])
if data != False:
# parse paths
oldCoordinates = (0.0, documentHeight)
path = ''
for i, command in enumerate(data):
if command.strip() != '':
if command[:2] == 'PU': # if Pen Up command
if " L" in path:
inkex.etree.SubElement(layerDrawing, 'path', {'d':path, 'style':'stroke:#000000; stroke-width:0.2; fill:none;'})
if options.showMovements and i != len(data) - 1:
path = 'M %f,%f' % oldCoordinates
path += ' L %f,%f' % getCoordinates(command[2:])
inkex.etree.SubElement(layerMovements, 'path', {'d':path, 'style':'stroke:#ff0000; stroke-width:0.2; fill:none;'})
path = 'M %f,%f' % getCoordinates(command[2:])
elif command[:2] == 'PD': # if Pen Down command
path += ' L %f,%f' % getCoordinates(command[2:])
oldCoordinates = getCoordinates(command[2:])
elif command[:2] == 'IN': # if Initialize command
pass
elif command[:2] == 'SP': # if Select Pen command
pass
else:
hasUnknownCommands = True
if " L" in path:
inkex.etree.SubElement(layerDrawing, 'path', {'d':path, 'style':'stroke:#000000; stroke-width:0.2; fill:none;'})
# deliver document to inkscape
doc.write(inkex.sys.stdout)
# issue warning if unknown commands where found
if hasUnknownCommands:
inkex.errormsg(_("The HPGL data contained unknown (unsupported) commands, there is a possibility that the drawing is missing some content."))
# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
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