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46 lines
1.4 KiB
46 lines
1.4 KiB
# This file is part of Chalk
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#
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# Copyright (c) 2005-2006 Cyrille Berger <cberger@cberger.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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require "krosschalkcore"
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doc = Krosschalkcore::get("ChalkDocument")
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script = Krosschalkcore::get("ChalkScript")
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image = doc.getImage()
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layer = image.getActivePaintLayer()
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if(layer.colorSpaceId() != "RGBA" )
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raise("This script works only for 8bit RGBA layers")
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end
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width = layer.getWidth()
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height = layer.getHeight()
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script.setProgressTotalSteps(width * height)
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layer.beginPainting("invert")
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it = layer.createRectIterator( 0, 0, width, height )
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while (it.isDone() == 0)
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p = it.getRGBA()
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p[0] = 255 - p[0]
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p[1] = 255 - p[1]
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p[2] = 255 - p[2]
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it.setRGBA(p)
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script.incProgress()
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it.next()
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end
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layer.endPainting()
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