1 files changed, 89 insertions, 0 deletions
diff --git a/share/extensions/path_mesh_p2m.py b/share/extensions/path_mesh_p2m.py
new file mode 100755
index 0000000..d5a4877
--- /dev/null
+++ b/share/extensions/path_mesh_p2m.py
@@ -0,0 +1,89 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2016 su_v, <suv-sf@users.sf.net>
+#
+# 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
+#
+"""
+Convert path to mesh gradient
+"""
+
+import inkex
+from inkex.paths import Line, Curve
+from inkex.elements import MeshGradient
+
+class PathToMesh(inkex.EffectExtension):
+    """Convert path data to mesh geometry."""
+    def add_arguments(self, pars):
+        pars.add_argument("--tab", help="The selected UI-tab")
+
+    def add_mesh(self, meshgradient):
+        """Add meshgradient definition to current document."""
+        self.svg.defs.append(meshgradient)
+        meshgradient.set_random_id('meshgradient')
+        return meshgradient.get_id()
+
+    def effect(self):
+        """Main routine to convert path data to mesh geometry."""
+        # loop through selection
+        for node in self.svg.selection.filter(inkex.PathElement).values():
+            csp = None
+            meshgradient = None
+            mesh_id = None
+            # parse path data
+            csp = node.path.to_superpath()
+            # convert csp to meshgradient definition
+            if csp is not None:
+                # TODO: check length of path data / csp
+                meshgradient = self.to_mesh(node, csp)
+            # add meshgradient to document
+            if meshgradient is not None:
+                mesh_id = self.add_mesh(meshgradient)
+            # apply meshgradient to node
+            if mesh_id is not None:
+                node.style['fill'] = 'url(#{})'.format(mesh_id)
+
+    def to_mesh(self, node, csp, subpath=0):
+        """Convert csp to meshgradient geometry."""
+        # mesh data
+        corners, edges = self.to_meshdata(csp[subpath])
+        # alternating stop colors
+        colors = [node.style.get('fill'), '#ffffff']
+        # define meshgradient with first corner as initial point
+        meshgradient = MeshGradient.new_mesh(pos=corners[0], rows=1, cols=1)
+        # define stops (stop-color, path) for first meshpatch
+        meshgradient[0][0].stops(edges[0:4], colors)
+        return meshgradient
+
+    @staticmethod
+    def to_meshdata(subpath):
+        """Convert csp subpath to corners, edge path data."""
+        if len(subpath) >= 5:
+            corners = []
+            edges = []
+            for i, corner in enumerate(subpath[:4]):
+                corners.append(corner[1])
+                edge = [list(subpath[i]), list(subpath[i+1])]
+                edge[0][0] = list(edge[0][1])
+                edge[1][2] = list(edge[1][1])
+                if inkex.CubicSuperPath.is_line(edge[0], edge[1]):
+                    edges.append(Line(*edge[1][1]))
+                else:
+                    edges.append(Curve(*(edge[0][2] + edge[1][0] + edge[1][1])))
+
+        return corners, edges
+
+if __name__ == '__main__':
+    PathToMesh().run()