diff options
Diffstat (limited to 'chalk/plugins/viewplugins/scripting/samples/ruby/invert.rb')
| -rw-r--r-- | chalk/plugins/viewplugins/scripting/samples/ruby/invert.rb | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/chalk/plugins/viewplugins/scripting/samples/ruby/invert.rb b/chalk/plugins/viewplugins/scripting/samples/ruby/invert.rb new file mode 100644 index 00000000..d9ad32f7 --- /dev/null +++ b/chalk/plugins/viewplugins/scripting/samples/ruby/invert.rb @@ -0,0 +1,45 @@ +# This file is part of Chalk +# +# Copyright (c) 2005-2006 Cyrille Berger <cberger@cberger.net> +# +# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + +require "krosschalkcore" + +doc = Krosschalkcore::get("ChalkDocument") +script = Krosschalkcore::get("ChalkScript") +image = doc.getImage() +layer = image.getActivePaintLayer() + +if(layer.colorSpaceId() != "RGBA" ) + raise("This script works only for 8bit RGBA layers") +end + +width = layer.getWidth() +height = layer.getHeight() +script.setProgressTotalSteps(width * height) +layer.beginPainting("invert") +it = layer.createRectIterator( 0, 0, width, height ) +while (it.isDone() == 0) + p = it.getRGBA() + p[0] = 255 - p[0] + p[1] = 255 - p[1] + p[2] = 255 - p[2] + it.setRGBA(p) + script.incProgress() + it.next() +end + +layer.endPainting() |