1#!/usr/local/bin/python3.8 2# 3# Copyright (C) 2016 su_v, <suv-sf@users.sf.net> 4# 5# This program is free software; you can redistribute it and/or modify 6# it under the terms of the GNU General Public License as published by 7# the Free Software Foundation; either version 2 of the License, or 8# (at your option) any later version. 9# 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14# 15# You should have received a copy of the GNU General Public License 16# along with this program; if not, write to the Free Software 17# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18# 19""" 20Convert path to mesh gradient 21""" 22 23import inkex 24from inkex.paths import Line, Curve 25from inkex.elements import MeshGradient 26 27class PathToMesh(inkex.EffectExtension): 28 """Convert path data to mesh geometry.""" 29 def add_arguments(self, pars): 30 pars.add_argument("--tab", help="The selected UI-tab") 31 32 def add_mesh(self, meshgradient): 33 """Add meshgradient definition to current document.""" 34 self.svg.defs.append(meshgradient) 35 meshgradient.set_random_id('meshgradient') 36 return meshgradient.get_id() 37 38 def effect(self): 39 """Main routine to convert path data to mesh geometry.""" 40 # loop through selection 41 for node in self.svg.selection.filter(inkex.PathElement): 42 csp = None 43 meshgradient = None 44 mesh_id = None 45 # parse path data 46 csp = node.path.to_superpath() 47 # convert csp to meshgradient definition 48 if csp is not None: 49 # TODO: check length of path data / csp 50 meshgradient = self.to_mesh(node, csp) 51 # add meshgradient to document 52 if meshgradient is not None: 53 mesh_id = self.add_mesh(meshgradient) 54 # apply meshgradient to node 55 if mesh_id is not None: 56 node.style['fill'] = 'url(#{})'.format(mesh_id) 57 58 def to_mesh(self, node, csp, subpath=0): 59 """Convert csp to meshgradient geometry.""" 60 # mesh data 61 corners, edges = self.to_meshdata(csp[subpath]) 62 # alternating stop colors 63 colors = [node.style.get('fill'), '#ffffff'] 64 # define meshgradient with first corner as initial point 65 meshgradient = MeshGradient.new_mesh(pos=corners[0], rows=1, cols=1) 66 # define stops (stop-color, path) for first meshpatch 67 meshgradient[0][0].stops(edges[0:4], colors) 68 return meshgradient 69 70 @staticmethod 71 def to_meshdata(subpath): 72 """Convert csp subpath to corners, edge path data.""" 73 if len(subpath) >= 5: 74 corners = [] 75 edges = [] 76 for i, corner in enumerate(subpath[:4]): 77 corners.append(corner[1]) 78 edge = [list(subpath[i]), list(subpath[i+1])] 79 edge[0][0] = list(edge[0][1]) 80 edge[1][2] = list(edge[1][1]) 81 if inkex.CubicSuperPath.is_line(edge[0], edge[1]): 82 edges.append(Line(*edge[1][1])) 83 else: 84 edges.append(Curve(*(edge[0][2] + edge[1][0] + edge[1][1]))) 85 86 return corners, edges 87 88if __name__ == '__main__': 89 PathToMesh().run() 90