share/extensions/hpgl_output.py

   1 #!/usr/bin/env python
   2 '''
   3 Copyright (C) 2008 Aaron Spike, aaron@ekips.org
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 '''
  19 import inkex, cubicsuperpath, simplepath, simplestyle, cspsubdiv
  20
  21 class MyEffect(inkex.Effect):
  22     def __init__(self):
  23         inkex.Effect.__init__(self)
  24         self.OptionParser.add_option("-f", "--flatness",
  25                         action="store", type="float",
  26                         dest="flat", default=0.2,
  27                         help="Minimum flatness of the subdivided curves")
  28         self.OptionParser.add_option("-m", "--mirror",
  29                         action="store", type="inkbool",
  30                         dest="mirror", default="FALSE",
  31                         help="Mirror Y-Axis")
  32         self.OptionParser.add_option("-x", "--xOrigin",
  33                         action="store", type="float",
  34                         dest="xOrigin", default=0.0,
  35                         help="X Origin (pixels)")
  36         self.OptionParser.add_option("-y", "--yOrigin",
  37                         action="store", type="float",
  38                         dest="yOrigin", default=0.0,
  39                         help="Y Origin (pixels)")
  40         self.OptionParser.add_option("-p", "--plotInvisibleLayers",
  41                         action="store", type="inkbool",
  42                         dest="plotInvisibleLayers", default="FALSE",
  43                         help="Plot invisible layers")
  44
  45         self.hpgl = ['IN;SP1;']
  46     def output(self):
  47         print ''.join(self.hpgl)
  48     def effect(self):
  49         x0 = self.options.xOrigin
  50         y0 = self.options.yOrigin
  51         scale = 1016.0/90
  52         mirror = 1.0
  53         if self.options.mirror:
  54             mirror = -1.0
  55             if self.document.getroot().get('height'):
  56                 y0 -= float(self.document.getroot().get('height'))
  57         i = 0
  58         layerPath = '//svg:g[@inkscape:groupmode="layer"]'
  59         for layer in self.document.getroot().xpath(layerPath, namespaces=inkex.NSS):
  60             i += 1
  61             style = layer.get('style')
  62             if style:
  63                 style = simplestyle.parseStyle(style)
  64                 if style['display']=='none':
  65                     if not self.options.plotInvisibleLayers:
  66                         continue
  67             nodePath = ('//svg:g[@inkscape:groupmode="layer"][%d]/descendant::svg:path') % i
  68             for node in self.document.getroot().xpath(nodePath, namespaces=inkex.NSS):
  69                 d = node.get('d')
  70                 if len(simplepath.parsePath(d)):
  71                     p = cubicsuperpath.parsePath(d)
  72                     cspsubdiv.cspsubdiv(p, self.options.flat)
  73                     for sp in p:
  74                         first = True
  75                         for csp in sp:
  76                             cmd = 'PD'
  77                             if first:
  78                                 cmd = 'PU'
  79                             first = False
  80                             self.hpgl.append('%s%d,%d;' % (cmd,(csp[1][0] - x0)*scale,(csp[1][1]*mirror - y0)*scale))
  81
  82 if __name__ == '__main__':   #pragma: no cover
  83     e = MyEffect()
  84     e.affect()
  85
  86 # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99