146 lines
7.1 KiB
Python
146 lines
7.1 KiB
Python
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#!/usr/bin/env python3
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'''
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This extension Create a eraser layer
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Copyright (C) 2012 Jabiertxo Arraiza, jabier.arraiza@marker.es
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Version 0.4 - Eraser
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TODO:
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Comment Better!!!
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CHANGE LOG
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0.1 Start 30/07/2012
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0.3 fix bug with borders
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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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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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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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import inkex
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import sys
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from lxml import etree
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class EraserLayer(inkex.Effect):
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def __init__(self):
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inkex.Effect.__init__(self)
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#inserta el flltro que pasa a negro la mascara
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def insertFilter(self, svg):
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xpathStr = '//filter[@id="Decolorize_0001"]'
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filterElement = svg.xpath(xpathStr, namespaces=inkex.NSS)
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if filterElement == []:
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xpathStr = '//svg:defs'
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defs = svg.xpath(xpathStr, namespaces=inkex.NSS)
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flt = etree.SubElement(defs[0],inkex.addNS('filter','svg'))
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for k, v in [('id', 'Decolorize_0001'), ('color-interpolation-filters', 'sRGB'),
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('height', '100'), ('width', '100'),
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('x', '-50'), ('y', '-50')]:
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flt.set(k, v)
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fltColorMatrix = etree.SubElement(flt,inkex.addNS('feColorMatrix','svg'))
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for k, v in [('id', 'feColorMatrix_0001'),('values','1'), ('in', 'SourceGraphic'),
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('type', 'saturate'), ('result', 'result2')]:
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fltColorMatrix.set(k, v)
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fltFlood = etree.SubElement(flt,inkex.addNS('feFlood','svg'))
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for k, v in [('id', 'feFlood_0001'),('flood-color','rgb(255,255,255)'), ('flood-opacity', '1'),
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('result', 'result1')]:
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fltFlood.set(k, v)
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fltComposite = etree.SubElement(flt,inkex.addNS('feComposite','svg'))
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for k, v in [('id', 'feComposite_0001'),('operator', 'atop'),('in2', 'SourceGraphic')
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,('k2', '1'),('result', 'result4')]:
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fltComposite.set(k, v)
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fltInverse = etree.SubElement(defs[0],inkex.addNS('filter','svg'))
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for k, v in [('id', 'Inverse_0001'), ('color-interpolation-filters', 'sRGB'),
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('height', '100'), ('width', '100'),
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('x', '-50'), ('y', '-50')]:
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fltInverse.set(k, v)
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fltColorMatrixInverse = etree.SubElement(fltInverse,inkex.addNS('feColorMatrix','svg'))
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for k, v in [('id', 'feColorMatrixInverse_0001'),('values','1'),
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('type', 'saturate'), ('result', 'fbSourceGraphic')]:
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fltColorMatrixInverse.set(k, v)
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fltColorMatrixInverse = etree.SubElement(fltInverse,inkex.addNS('feColorMatrix','svg'))
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for k, v in [('id', 'feColorMatrixInverse_0002'),('in','fbSourceGraphic'),
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('values', '-1 0 0 0 1 0 -1 0 0 1 0 0 -1 0 1 0 0 0 1 0 ')]:
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fltColorMatrixInverse.set(k, v)
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#Inserta la mascara desde el grupo eraser
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def insertMask(self, idLayer, svg):
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xpathStr = '//mask[@id="MaskEraser_' + idLayer + '"]'
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maskElement = svg.xpath(xpathStr, namespaces=inkex.NSS)
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if maskElement == []:
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xpathStr = '//svg:defs'
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defs = svg.xpath(xpathStr, namespaces=inkex.NSS)
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msk = etree.SubElement(defs[0],inkex.addNS('mask','svg'))
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for k, v in [('id', 'Eraser_' + idLayer), ('maskUnits', 'userSpaceOnUse')]:
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msk.set(k, v)
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use = etree.SubElement(msk,inkex.addNS('use','svg'))
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for k, v in [('id', 'Use_Eraser_' + idLayer), ('{http://www.w3.org/1999/xlink}href',
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"#EraserLayer_" + idLayer),('style',"filter:url(#Inverse_0001)")]:
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use.set(k, v)
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rct = etree.SubElement(msk,inkex.addNS('rect','svg'))
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for k, v in [('id', 'Background_' + idLayer), ('x', '-25000000'),
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('y', '-25000000'), ('width', '50000000'), ('height', '50000000'),
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('style', 'fill:#FFFFFF;fill-opacity:1')]:
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rct.set(k, v)
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##crea el grupo contenedor que hara de borrador
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def createEraserLayer(self, layer,idLayer):
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container = etree.Element("g")
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container.set("id","ContainerEraserLayer_" + idLayer)
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container.set('style',"opacity:0.000000000000000000000000000000000000000000000001")
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container.set("{http://www.inkscape.org/namespaces/inkscape}groupmode","layer")
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container.set("{http://www.inkscape.org/namespaces/inkscape}label", "[container eraser] " + layer[0].get("{http://www.inkscape.org/namespaces/inkscape}label"))
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for position, item in enumerate(layer[0].getparent().getchildren()):
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if item == layer[0]:
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break;
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layer[0].getparent().insert(position+1,container)
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eraser = etree.Element("g")
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eraser.set("id","EraserLayer_" + idLayer)
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eraser.set('style',"filter:url(#Decolorize_0001)")
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eraser.set('transform',"rotate(360)")
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eraser.set("{http://www.inkscape.org/namespaces/inkscape}groupmode","layer")
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eraser.set("{http://www.inkscape.org/namespaces/inkscape}label", "[eraser] " + layer[0].get("{http://www.inkscape.org/namespaces/inkscape}label"))
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layer[0].set('mask',"url(#Eraser_" + idLayer + ")")
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selected = []
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for id, node in self.svg.selected.items():
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eraser.insert(1,node)
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container.insert(1,eraser)
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def effect(self):
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saveout = sys.stdout
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sys.stdout = sys.stderr
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svg = self.document.getroot()
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xpathStr = '//sodipodi:namedview'
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namedview = svg.xpath(xpathStr, namespaces=inkex.NSS)
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idLayer = namedview[0].get('{http://www.inkscape.org/namespaces/inkscape}current-layer');
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if idLayer.startswith("[mask] ") == False and idLayer.startswith("[eraser] ") == False:
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xpathStr = '//svg:g[@id="EraserLayer_'+idLayer+'"]'
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filterElement = svg.xpath(xpathStr, namespaces=inkex.NSS)
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if filterElement == []:
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xpathStr = '//svg:g[@id="'+idLayer+'"]'
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layer = svg.xpath(xpathStr, namespaces=inkex.NSS)
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if layer[0] is not None and layer[0].get("{http://www.inkscape.org/namespaces/inkscape}label") is not None:
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self.insertFilter(svg)
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self.insertMask(idLayer, svg)
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self.createEraserLayer(layer,idLayer)
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else:
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print ("Layer not found, Maybe insisde a group?")
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else:
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for id, node in self.svg.selected.items():
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filterElement[0].insert(1,node)
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sys.stdout = saveout
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EraserLayer().run()
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