92 lines
3.4 KiB
Python
Executable file
92 lines
3.4 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# Copyright (C) 2016 su_v, <suv-sf@users.sf.net>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Convert path to mesh gradient
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"""
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import inkex
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from inkex.paths import Line, Curve
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from inkex.elements import MeshGradient
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class PathToMesh(inkex.EffectExtension):
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"""Convert path data to mesh geometry."""
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def add_arguments(self, pars):
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pars.add_argument("--tab", help="The selected UI-tab")
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def add_mesh(self, meshgradient):
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"""Add meshgradient definition to current document."""
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self.svg.defs.append(meshgradient)
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meshgradient.set_random_id("meshgradient")
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return meshgradient.get_id()
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def effect(self):
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"""Main routine to convert path data to mesh geometry."""
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# loop through selection
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for node in self.svg.selection.filter(inkex.PathElement):
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csp = None
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meshgradient = None
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mesh_id = None
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# parse path data
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csp = node.path.to_superpath()
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# convert csp to meshgradient definition
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if csp is not None:
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# TODO: check length of path data / csp
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meshgradient = self.to_mesh(node, csp)
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# add meshgradient to document
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if meshgradient is not None:
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mesh_id = self.add_mesh(meshgradient)
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# apply meshgradient to node
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if mesh_id is not None:
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node.style["fill"] = "url(#{})".format(mesh_id)
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def to_mesh(self, node, csp, subpath=0):
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"""Convert csp to meshgradient geometry."""
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# mesh data
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corners, edges = self.to_meshdata(csp[subpath])
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# alternating stop colors
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colors = [node.style.get("fill"), "#ffffff"]
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# define meshgradient with first corner as initial point
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meshgradient = MeshGradient.new_mesh(pos=corners[0], rows=1, cols=1)
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# define stops (stop-color, path) for first meshpatch
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meshgradient[0][0].stops(edges[0:4], colors)
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return meshgradient
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@staticmethod
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def to_meshdata(subpath):
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"""Convert csp subpath to corners, edge path data."""
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if len(subpath) >= 5:
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corners = []
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edges = []
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for i, corner in enumerate(subpath[:4]):
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corners.append(corner[1])
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edge = [list(subpath[i]), list(subpath[i + 1])]
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edge[0][0] = list(edge[0][1])
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edge[1][2] = list(edge[1][1])
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if inkex.CubicSuperPath.is_line(edge[0], edge[1]):
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edges.append(Line(*edge[1][1]))
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else:
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edges.append(Curve(*(edge[0][2] + edge[1][0] + edge[1][1])))
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return corners, edges
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if __name__ == "__main__":
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PathToMesh().run()
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