From e0f8c7119a43773d56c2c4e8236855311409f1de Mon Sep 17 00:00:00 2001
From: prokoudine <prokoudine@users.sourceforge.net>
Date: Thu, 5 Jun 2008 15:56:03 +0000
Subject: [PATCH] added HPGL export extension, courtesy of Aaron Spike

---
 po/POTFILES.in                   |  1 +
 share/extensions/Makefile.am     |  2 ++
 share/extensions/hpgl_output.inx | 19 +++++++++++++
 share/extensions/hpgl_output.py  | 47 ++++++++++++++++++++++++++++++++
 4 files changed, 69 insertions(+)
 create mode 100644 share/extensions/hpgl_output.inx
 create mode 100644 share/extensions/hpgl_output.py

diff --git a/po/POTFILES.in b/po/POTFILES.in
index 3c20358b3..a520095b7 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -373,6 +373,7 @@ share/extensions/svg_and_media_zip_output.py
 [type: gettext/xml] share/extensions/grid_cartesian.inx
 [type: gettext/xml] share/extensions/grid_polar.inx
 [type: gettext/xml] share/extensions/handles.inx
+[type: gettext/xml] share/extensions/hpgl_output.inx
 [type: gettext/xml] share/extensions/inkscape_help_askaquestion.inx
 [type: gettext/xml] share/extensions/inkscape_help_commandline.inx
 [type: gettext/xml] share/extensions/inkscape_help_faq.inx
diff --git a/share/extensions/Makefile.am b/share/extensions/Makefile.am
index 62fa9eeda..73b5ad78a 100644
--- a/share/extensions/Makefile.am
+++ b/share/extensions/Makefile.am
@@ -59,6 +59,7 @@ extensions = \
 	grid_cartesian.py \
 	grid_polar.py \
 	handles.py \
+	hpgl_output.py \
 	ill2svg.pl \
 	inkex.py \
 	interp.py \
@@ -167,6 +168,7 @@ modules = \
 	grid_cartesian.inx \
 	grid_polar.inx \
 	handles.inx \
+	hpgl_output.inx \
 	inkscape_help_askaquestion.inx \
 	inkscape_help_commandline.inx \
 	inkscape_help_faq.inx\
diff --git a/share/extensions/hpgl_output.inx b/share/extensions/hpgl_output.inx
new file mode 100644
index 000000000..f351a79f4
--- /dev/null
+++ b/share/extensions/hpgl_output.inx
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+  <_name>HPGL Output</_name>
+  <id>org.ekips.output.hpgl</id>
+  <dependency type="extension">org.inkscape.output.svg.inkscape</dependency>
+  <dependency type="executable" location="extensions">hpgl_output.py</dependency>
+  <dependency type="executable" location="extensions">inkex.py</dependency>
+  <output>
+    <extension>.hpgl</extension>
+    <mimetype>image/hpgl</mimetype>
+    <_filetypename>HP Graphics Language file (*.hpgl)</_filetypename>
+    <_filetypetooltip>Export to an HP Graphics Language file</_filetypetooltip>
+    <dataloss>TRUE</dataloss>
+  </output>
+  <script>
+    <command reldir="extensions" interpreter="python">hpgl_output.py</command>
+    <helper_extension>org.inkscape.output.svg.inkscape</helper_extension>
+  </script>
+</inkscape-extension>
diff --git a/share/extensions/hpgl_output.py b/share/extensions/hpgl_output.py
new file mode 100644
index 000000000..f94456a0c
--- /dev/null
+++ b/share/extensions/hpgl_output.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python 
+'''
+Copyright (C) 2008 Aaron Spike, aaron@ekips.org
+
+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
+'''
+import inkex, cubicsuperpath, simplepath, cspsubdiv
+
+class MyEffect(inkex.Effect):
+    def __init__(self):
+        inkex.Effect.__init__(self)
+        self.OptionParser.add_option("-f", "--flatness",
+                        action="store", type="float", 
+                        dest="flat", default=10.0,
+                        help="Minimum flatness of the subdivided curves")
+        self.hpgl = ['IN;SP1;']
+    def output(self):
+        print ''.join(self.hpgl)
+    def effect(self):
+        path = '//svg:path'
+        for node in self.document.getroot().xpath(path, namespaces=inkex.NSS):
+            d = node.get('d')
+            p = cubicsuperpath.parsePath(d)
+            cspsubdiv.cspsubdiv(p, self.options.flat)
+            for sp in p:
+                first = True
+                for csp in sp:
+                    cmd = 'PD'
+                    if first:
+                        cmd = 'PU'
+                    first = False
+                    self.hpgl.append('%s%s,%s;' % (cmd,csp[1][0],csp[1][1]))
+
+e = MyEffect()
+e.affect()
\ No newline at end of file
-- 
2.30.2