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mightyscape-1.1-deprecated/extensions/fablabchemnitz/eraser_layer.py

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2020-07-30 01:16:18 +02:00
#!/usr/bin/env python3
'''
This extension Create a eraser layer
Copyright (C) 2012 Jabiertxo Arraiza, jabier.arraiza@marker.es
Version 0.4 - Eraser
TODO:
Comment Better!!!
CHANGE LOG
0.1 Start 30/07/2012
0.3 fix bug with borders
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
'''
import inkex
import sys
from lxml import etree
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class EraserLayer(inkex.EffectExtension):
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def __init__(self):
inkex.Effect.__init__(self)
#inserta el flltro que pasa a negro la mascara
def insertFilter(self, svg):
xpathStr = '//filter[@id="Decolorize_0001"]'
filterElement = svg.xpath(xpathStr, namespaces=inkex.NSS)
if filterElement == []:
xpathStr = '//svg:defs'
defs = svg.xpath(xpathStr, namespaces=inkex.NSS)
flt = etree.SubElement(defs[0],inkex.addNS('filter','svg'))
for k, v in [('id', 'Decolorize_0001'), ('color-interpolation-filters', 'sRGB'),
('height', '100'), ('width', '100'),
('x', '-50'), ('y', '-50')]:
flt.set(k, v)
fltColorMatrix = etree.SubElement(flt,inkex.addNS('feColorMatrix','svg'))
for k, v in [('id', 'feColorMatrix_0001'),('values','1'), ('in', 'SourceGraphic'),
('type', 'saturate'), ('result', 'result2')]:
fltColorMatrix.set(k, v)
fltFlood = etree.SubElement(flt,inkex.addNS('feFlood','svg'))
for k, v in [('id', 'feFlood_0001'),('flood-color','rgb(255,255,255)'), ('flood-opacity', '1'),
('result', 'result1')]:
fltFlood.set(k, v)
fltComposite = etree.SubElement(flt,inkex.addNS('feComposite','svg'))
for k, v in [('id', 'feComposite_0001'),('operator', 'atop'),('in2', 'SourceGraphic')
,('k2', '1'),('result', 'result4')]:
fltComposite.set(k, v)
fltInverse = etree.SubElement(defs[0],inkex.addNS('filter','svg'))
for k, v in [('id', 'Inverse_0001'), ('color-interpolation-filters', 'sRGB'),
('height', '100'), ('width', '100'),
('x', '-50'), ('y', '-50')]:
fltInverse.set(k, v)
fltColorMatrixInverse = etree.SubElement(fltInverse,inkex.addNS('feColorMatrix','svg'))
for k, v in [('id', 'feColorMatrixInverse_0001'),('values','1'),
('type', 'saturate'), ('result', 'fbSourceGraphic')]:
fltColorMatrixInverse.set(k, v)
fltColorMatrixInverse = etree.SubElement(fltInverse,inkex.addNS('feColorMatrix','svg'))
for k, v in [('id', 'feColorMatrixInverse_0002'),('in','fbSourceGraphic'),
('values', '-1 0 0 0 1 0 -1 0 0 1 0 0 -1 0 1 0 0 0 1 0 ')]:
fltColorMatrixInverse.set(k, v)
#Inserta la mascara desde el grupo eraser
def insertMask(self, idLayer, svg):
xpathStr = '//mask[@id="MaskEraser_' + idLayer + '"]'
maskElement = svg.xpath(xpathStr, namespaces=inkex.NSS)
if maskElement == []:
xpathStr = '//svg:defs'
defs = svg.xpath(xpathStr, namespaces=inkex.NSS)
msk = etree.SubElement(defs[0],inkex.addNS('mask','svg'))
for k, v in [('id', 'Eraser_' + idLayer), ('maskUnits', 'userSpaceOnUse')]:
msk.set(k, v)
use = etree.SubElement(msk,inkex.addNS('use','svg'))
for k, v in [('id', 'Use_Eraser_' + idLayer), ('{http://www.w3.org/1999/xlink}href',
"#EraserLayer_" + idLayer),('style',"filter:url(#Inverse_0001)")]:
use.set(k, v)
rct = etree.SubElement(msk,inkex.addNS('rect','svg'))
for k, v in [('id', 'Background_' + idLayer), ('x', '-25000000'),
('y', '-25000000'), ('width', '50000000'), ('height', '50000000'),
('style', 'fill:#FFFFFF;fill-opacity:1')]:
rct.set(k, v)
##crea el grupo contenedor que hara de borrador
def createEraserLayer(self, layer,idLayer):
container = etree.Element("g")
container.set("id","ContainerEraserLayer_" + idLayer)
container.set('style',"opacity:0.000000000000000000000000000000000000000000000001")
container.set("{http://www.inkscape.org/namespaces/inkscape}groupmode","layer")
container.set("{http://www.inkscape.org/namespaces/inkscape}label", "[container eraser] " + layer[0].get("{http://www.inkscape.org/namespaces/inkscape}label"))
for position, item in enumerate(layer[0].getparent().getchildren()):
if item == layer[0]:
break;
layer[0].getparent().insert(position+1,container)
eraser = etree.Element("g")
eraser.set("id","EraserLayer_" + idLayer)
eraser.set('style',"filter:url(#Decolorize_0001)")
eraser.set('transform',"rotate(360)")
eraser.set("{http://www.inkscape.org/namespaces/inkscape}groupmode","layer")
eraser.set("{http://www.inkscape.org/namespaces/inkscape}label", "[eraser] " + layer[0].get("{http://www.inkscape.org/namespaces/inkscape}label"))
layer[0].set('mask',"url(#Eraser_" + idLayer + ")")
selected = []
for id, node in self.svg.selected.items():
eraser.insert(1,node)
container.insert(1,eraser)
def effect(self):
saveout = sys.stdout
sys.stdout = sys.stderr
svg = self.document.getroot()
xpathStr = '//sodipodi:namedview'
namedview = svg.xpath(xpathStr, namespaces=inkex.NSS)
idLayer = namedview[0].get('{http://www.inkscape.org/namespaces/inkscape}current-layer');
if idLayer.startswith("[mask] ") == False and idLayer.startswith("[eraser] ") == False:
xpathStr = '//svg:g[@id="EraserLayer_'+idLayer+'"]'
filterElement = svg.xpath(xpathStr, namespaces=inkex.NSS)
if filterElement == []:
xpathStr = '//svg:g[@id="'+idLayer+'"]'
layer = svg.xpath(xpathStr, namespaces=inkex.NSS)
if layer[0] is not None and layer[0].get("{http://www.inkscape.org/namespaces/inkscape}label") is not None:
self.insertFilter(svg)
self.insertMask(idLayer, svg)
self.createEraserLayer(layer,idLayer)
else:
print ("Layer not found, Maybe insisde a group?")
else:
for id, node in self.svg.selected.items():
filterElement[0].insert(1,node)
sys.stdout = saveout
if __name__ == '__main__':
EraserLayer().run()