1 files changed, 156 insertions, 0 deletions
diff --git a/share/extensions/dxf12_outlines.py b/share/extensions/dxf12_outlines.py
new file mode 100755
index 0000000..504a64d
--- /dev/null
+++ b/share/extensions/dxf12_outlines.py
@@ -0,0 +1,156 @@
+#!/usr/bin/env python
+# coding=utf-8
+#
+# Copyright (C) 2005,2007 Aaron Spike, aaron@ekips.org
+# - template dxf_outlines.dxf added Feb 2008 by Alvin Penner, penner@vaxxine.com
+# - layers, transformation, flattening added April 2008 by Bob Cook, bob@bobcookdev.com
+# - added support for dxf R12, Nov. 2008 by Switcher
+# - brought together to replace ps2edit version 2018 by Martin Owens
+#
+# 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
+#
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+import re
+
+import inkex
+import inkex.units
+from inkex.bezier import cspsubdiv
+
+r12_header = """ 0 
+SECTION
+ 2 
+HEADER
+ 9 
+$ACADVER
+ 1 
+AC1009
+ 9 
+$EXTMIN
+ 10 
+ 0 
+ 20 
+ 0 
+ 9 
+$EXTMAX
+ 10 
+ 8.5 
+ 20 
+ 11 
+ 0 
+ENDSEC
+ 0 
+SECTION
+ 2 
+ENTITIES
+"""
+
+r12_footer = """ 0 
+ENDSEC
+ 0 
+EOF"""
+
+
+class DxfTwelve(inkex.OutputExtension):
+    """Create dxf12 output from the svg"""
+
+    def __init__(self):
+        super(DxfTwelve, self).__init__()
+        self.handle = 255
+        self.flatness = 0.1
+
+    def dxf_add(self, line):
+        self._stream.write(line.encode("utf-8"))
+
+    def dxf_insert_code(self, code, value):
+        self.dxf_add(code + "\n" + value + "\n")
+
+    def dxf_line(self, layer, csp):
+        self.dxf_insert_code("0", "LINE")
+        self.dxf_insert_code("8", layer)
+        # self.dxf_insert_code(  '62', '1' )  #Change the Line Color
+        self.dxf_insert_code("10", "{:f}".format(csp[0][0]))
+        self.dxf_insert_code("20", "{:f}".format(csp[0][1]))
+        self.dxf_insert_code("11", "{:f}".format(csp[1][0]))
+        self.dxf_insert_code("21", "{:f}".format(csp[1][1]))
+
+    def dxf_path_to_lines(self, layer, p):
+        f = self.flatness
+        is_flat = 0
+        while is_flat < 1:
+            try:
+                cspsubdiv(p, self.flatness)
+                is_flat = 1
+            except:
+                f += 0.1
+
+        for sub in p:
+            for i in range(len(sub) - 1):
+                self.handle += 1
+                s = sub[i]
+                e = sub[i + 1]
+                self.dxf_line(layer, [s[1], e[1]])
+
+    def dxf_path_to_point(self, layer, p):
+        bbox = inkex.Path(p).bounding_box() or inkex.BoundingBox(0, 0)
+        x, y = bbox.center
+        self.dxf_point(layer, x, y)
+
+    def save(self, stream):
+        self._stream = stream
+        self.dxf_insert_code("999", '"DXF R12 Output" (www.mydxf.blogspot.com)')
+        self.dxf_add(r12_header)
+
+        # Scale, but assume that the viewport is based on mm (dxf expects mm)
+        scale = self.svg.scale / inkex.units.convert_unit("1mm", "px")
+        h = self.svg.viewbox_height
+
+        path = "//svg:path"
+        for node in self.svg.xpath(path):
+            visible = True
+            for parent in node.iterancestors():
+                if isinstance(parent, (inkex.ClipPath, inkex.Mask)):
+                    visible = False
+                    break
+            if not visible:
+                continue
+
+            layer = (
+                node.getparent().label
+            )  # TODO this assumes that all elements are direct
+            # descendants of layers
+            if layer is None:
+                layer = "Layer 1"
+
+            node.transform = node.composed_transform()
+            node.transform = (
+                inkex.Transform([[scale, 0, 0], [0, -scale, h * scale]])
+                @ node.transform
+            )
+            node.apply_transform()
+            path = node.path.to_superpath()
+
+            if re.search("drill$", layer, re.I) is None:
+                # if layer == 'Brackets Drill':
+                self.dxf_path_to_lines(layer, path)
+            else:
+                self.dxf_path_to_point(layer, path)
+
+        self.dxf_add(r12_footer)
+
+
+if __name__ == "__main__":
+    DxfTwelve().run()