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#!/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()
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