added grey to monoalpha
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<?xml version="1.0" encoding="UTF-8"?>
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<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
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<name>Grey to MonoAlpha</name>
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<id>fablabchemnitz.de.grey_to_monoalpha</id>
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<param name="tab" type="notebook">
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<page name="main_page" gui-text="Settings">
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<vbox>
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<hbox>
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<param name="color_picker_mono" type="color" appearance="colorbutton" gui-text="Mono Colour">0x000000ff</param>
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</hbox>
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<hbox>
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<param name="apply_to_type_radio" type="optiongroup" appearance="radio" gui-text="Apply To">
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<option value="fill_and_stroke">Fill and Stroke</option>
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<option value="fill">Fill Only</option>
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<option value="stroke">Stroke Only</option>
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</param>
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</hbox>
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<hbox>
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<label>Opacity Threshold</label>
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<param name="opacity_lower_threshold" type="float" min="0" max="0.9" gui-text="Lower" gui-description="opacity_lower_threshold">0</param>
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<param name="opacity_upper_threshold" type="float" min="0.05" max="1" gui-text="Upper" gui-description="opacity_upper_threshold">1</param>
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</hbox>
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</vbox>
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</page>
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<page name="about_page" gui-text="About">
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<label>Grey To MonoAlpha - An Inkscape Extension</label>
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<label>Inkscape 1.1 +</label>
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<label appearance="url">https://gitlab.com/inklinea/</label>
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<label xml:space="preserve">
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▶ Converts a Greyscale Image to
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Monochrome with variable Opacity.
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▶ Threshold setting to avoid solid colour
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▶ Can be applied to stroke / fill or both
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</label>
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</page>
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</param>
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<effect>
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<object-type>path</object-type>
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<effects-menu>
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<submenu name="FabLab Chemnitz">
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<submenu name="Various"/>
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</submenu>
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</effects-menu>
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</effect>
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<script>
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<command location="inx" interpreter="python">grey_to_monoalpha.py</command>
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</script>
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</inkscape-extension>
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#!/usr/bin/env python3
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#
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# Copyright (C) [2021] [Matt Cottam], [mpcottam@raincloud.co.uk]
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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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#
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##############################################################################
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# Grey To Mono Alpha *** Convert Greys to Monochrome with varying Opacity
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##############################################################################
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import math
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import inkex
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from inkex import Color
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# Python Standard Libary
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from statistics import mean
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def get_attributes(self):
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for att in dir(self):
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inkex.errormsg((att, getattr(self, att)))
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def rgba_to_bw_rgba(self, my_objects):
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apply_to = self.options.apply_to_type_radio
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mono_color = self.options.color_picker_mono.to_rgba()
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opacity_lower_threshold = self.options.opacity_lower_threshold
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opacity_upper_threshold = self.options.opacity_upper_threshold
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opacity_range = opacity_upper_threshold - opacity_lower_threshold
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for my_object in my_objects:
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if 'fill' in apply_to and ('fill:none' not in str(my_object.style)):
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my_fill_color = my_object.style.get_color(name='fill').to_rgba()
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my_fill_color_red = my_fill_color[0]
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my_fill_color_green = my_fill_color[1]
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my_fill_color_blue = my_fill_color[2]
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mean_fill_component_value = mean([my_fill_color_red, my_fill_color_blue, my_fill_color_green])
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if mean_fill_component_value > 0:
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mono_opacity = (1 - (mean_fill_component_value / 256)) * opacity_range
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mono_opacity = mono_opacity + opacity_lower_threshold
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else:
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mono_opacity = opacity_upper_threshold
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my_object.style['fill'] = str(mono_color)
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my_object.style['fill-opacity'] = str(mono_opacity)
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if 'stroke' in apply_to and (';stroke:none' not in str(my_object.style)) and ('stroke:' in str(my_object.style)):
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my_stroke_color = my_object.style.get_color(name='stroke').to_rgba()
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my_stroke_color_red = my_stroke_color[0]
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my_stroke_color_green = my_stroke_color[1]
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my_stroke_color_blue = my_stroke_color[2]
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mean_stroke_component_value = mean([my_stroke_color_red, my_stroke_color_blue, my_stroke_color_green])
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if mean_stroke_component_value > 0:
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mono_opacity = (1 - (mean_stroke_component_value / 256)) * opacity_range
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mono_opacity = mono_opacity + opacity_lower_threshold
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else:
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mono_opacity = opacity_upper_threshold
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my_object.style['stroke'] = str(mono_color)
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my_object.style['stroke-opacity'] = str(mono_opacity)
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class GreyToMonoAlpha(inkex.EffectExtension):
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def add_arguments(self, pars):
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pars.add_argument("--tab")
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pars.add_argument("--color_picker_mono", type=inkex.colors.Color, default=0)
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pars.add_argument("--apply_to_type_radio", default=None)
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pars.add_argument("--opacity_lower_threshold", type=float, default=0)
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pars.add_argument("--opacity_upper_threshold", type=float, default=1)
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def effect(self):
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my_objects = self.svg.selected
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if len(my_objects) < 1:
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self.msg('Please select some paths first.')
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return
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rgba_to_bw_rgba(self, my_objects)
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if __name__ == '__main__':
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GreyToMonoAlpha().run()
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20
extensions/fablabchemnitz/grey_to_monoalpha/meta.json
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20
extensions/fablabchemnitz/grey_to_monoalpha/meta.json
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[
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{
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"name": "Grey To MonoAlpha",
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"id": "fablabchemnitz.de.grey_to_monoalpha",
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"path": "grey_to_monoalpha",
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"original_name": "Grey to MonoAlpha",
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"original_id": "org.inkscape.grey_to_monoalpha",
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"license": "GNU GPL v3",
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"license_url": "https://gitlab.com/inklinea/grey-to-mono-alpha/-/blob/main/LICENSE",
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"comment": "",
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"source_url": "https://gitea.fablabchemnitz.de/FabLab_Chemnitz/mightyscape-1.X/src/branch/master/extensions/fablabchemnitz/grey_to_monoalpha",
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"fork_url": "https://gitlab.com/inklinea/grey-to-mono-alpha",
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"documentation_url": "https://stadtfabrikanten.org/display/IFM/Grey+to+MonoAlpha",
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"inkscape_gallery_url": null,
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"main_authors": [
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"gitlab.com/inklinea",
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"github.com/vmario89"
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]
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}
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]
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