extensions. hpgl input. new import routine by TimeWaster

Fixed bugs:
  - https://launchpad.net/bugs/1159641

(bzr r12365)

3 files changed, 134 insertions, 0 deletions

diff --git a/share/extensions/Makefile.am b/share/extensions/Makefile.am
index ee6bd0ea3..5a600be79 100644
--- a/share/extensions/Makefile.am
+++ b/share/extensions/Makefile.am
@@ -74,6 +74,7 @@ extensions = \
 	guides_creator.py \
 	guillotine.py \
 	handles.py \
+	hpgl_input.py \
 	hpgl_output.py \
 	ill2svg.pl \
 	ink2canvas.py \
@@ -262,6 +263,7 @@ modules = \
 	guides_creator.inx \
 	guillotine.inx \
 	handles.inx \
+	hpgl_input.inx \
 	hpgl_output.inx \
 	ink2canvas.inx \
 	inkscape_follow_link.inx \
diff --git a/share/extensions/hpgl_input.inx b/share/extensions/hpgl_input.inx
new file mode 100644
index 000000000..0d8cad158
--- /dev/null
+++ b/share/extensions/hpgl_input.inx
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+    <_name>HPGL Input</_name>
+    <id>org.inkscape.input.hpgl</id>
+    <dependency type="executable" location="extensions">hpgl_input.py</dependency>
+    <dependency type="executable" location="extensions">inkex.py</dependency>
+    <param name="resolutionX" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution X (dpi)" _gui-description="The amount of steps in one inch on the X axis (Default: 1016.0)">1016.0</param>
+    <param name="resolutionY" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution Y (dpi)" _gui-description="The amount of steps in one inch on the Y axis (Default: 1016.0)">1016.0</param>
+    <param name="showMovements" type="boolean" _gui-text="Show Movements between paths" _gui-description="Show movements between paths in a different color (Default: Un-checked)">false</param>
+    <input>
+        <extension>.hpgl</extension>
+        <mimetype>image/hpgl</mimetype>
+        <_filetypename>HP Graphics Language file (*.hpgl)</_filetypename>
+        <_filetypetooltip>Import HP Graphics Language file</_filetypetooltip>
+    </input>
+    <script>
+        <command reldir="extensions" interpreter="python">hpgl_input.py</command>
+    </script>
+</inkscape-extension>
diff --git a/share/extensions/hpgl_input.py b/share/extensions/hpgl_input.py
new file mode 100644
index 000000000..d20b344f5
--- /dev/null
+++ b/share/extensions/hpgl_input.py
@@ -0,0 +1,113 @@
+#!/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