added grey to monoalpha

2021-10-18 15:35:53 +02:00 · 2021-10-18 15:35:53 +02:00 · 19d56db343
commit 19d56db343
parent 0099b767d1
3 changed files with 167 additions and 0 deletions
--- a/extensions/fablabchemnitz/grey_to_monoalpha/grey_to_monoalpha.inx
+++ b/extensions/fablabchemnitz/grey_to_monoalpha/grey_to_monoalpha.inx
@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+    <name>Grey to MonoAlpha</name>
+    <id>fablabchemnitz.de.grey_to_monoalpha</id>
+    <param name="tab" type="notebook">
+        <page name="main_page" gui-text="Settings">
+            <vbox>
+                <hbox>
+                    <param name="color_picker_mono" type="color" appearance="colorbutton" gui-text="Mono Colour">0x000000ff</param>
+                </hbox>
+                <hbox>
+                    <param name="apply_to_type_radio" type="optiongroup" appearance="radio" gui-text="Apply To">
+                        <option value="fill_and_stroke">Fill and Stroke</option>
+                        <option value="fill">Fill Only</option>
+                        <option value="stroke">Stroke Only</option>
+                    </param>
+                </hbox>
+                <hbox>
+                    <label>Opacity Threshold</label>
+                    <param name="opacity_lower_threshold" type="float" min="0" max="0.9" gui-text="Lower" gui-description="opacity_lower_threshold">0</param>
+                    <param name="opacity_upper_threshold" type="float" min="0.05" max="1" gui-text="Upper" gui-description="opacity_upper_threshold">1</param>
+                </hbox>
+            </vbox>
+        </page>
+        <page name="about_page" gui-text="About">
+            <label>Grey To MonoAlpha - An Inkscape Extension</label>
+            <label>Inkscape 1.1 +</label>
+            <label appearance="url">https://gitlab.com/inklinea/</label>
+            <label xml:space="preserve">
+▶ Converts a Greyscale Image to
+  Monochrome with variable Opacity.
+▶ Threshold setting to avoid solid colour
+▶ Can be applied to stroke / fill or both
+        </label>
+        </page>
+    </param>
+    <effect>
+        <object-type>path</object-type>
+        <effects-menu>
+            <submenu name="FabLab Chemnitz">
+                <submenu name="Various"/>
+            </submenu>
+        </effects-menu>
+    </effect>
+    <script>
+        <command location="inx" interpreter="python">grey_to_monoalpha.py</command>
+    </script>
+</inkscape-extension>
--- a/extensions/fablabchemnitz/grey_to_monoalpha/grey_to_monoalpha.py
+++ b/extensions/fablabchemnitz/grey_to_monoalpha/grey_to_monoalpha.py
@ -0,0 +1,99 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) [2021] [Matt Cottam], [mpcottam@raincloud.co.uk]
+#
+# 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.
+#
+
+##############################################################################
+# Grey To Mono Alpha *** Convert Greys to Monochrome with varying Opacity
+##############################################################################
+
+import math
+
+import inkex
+from inkex import Color
+
+# Python Standard Libary
+
+from statistics import mean
+
+
+def get_attributes(self):
+    for att in dir(self):
+        inkex.errormsg((att, getattr(self, att)))
+
+
+def rgba_to_bw_rgba(self, my_objects):
+    apply_to = self.options.apply_to_type_radio
+    mono_color = self.options.color_picker_mono.to_rgba()
+    opacity_lower_threshold = self.options.opacity_lower_threshold
+    opacity_upper_threshold = self.options.opacity_upper_threshold
+    opacity_range = opacity_upper_threshold - opacity_lower_threshold
+
+    for my_object in my_objects:
+
+        if 'fill' in apply_to and ('fill:none' not in str(my_object.style)):
+            my_fill_color = my_object.style.get_color(name='fill').to_rgba()
+            my_fill_color_red = my_fill_color[0]
+            my_fill_color_green = my_fill_color[1]
+            my_fill_color_blue = my_fill_color[2]
+            mean_fill_component_value = mean([my_fill_color_red, my_fill_color_blue, my_fill_color_green])
+
+            if mean_fill_component_value > 0:
+                mono_opacity = (1 - (mean_fill_component_value / 256)) * opacity_range
+                mono_opacity = mono_opacity + opacity_lower_threshold
+            else:
+                mono_opacity = opacity_upper_threshold
+
+            my_object.style['fill'] = str(mono_color)
+            my_object.style['fill-opacity'] = str(mono_opacity)
+
+        if 'stroke' in apply_to and (';stroke:none' not in str(my_object.style)) and ('stroke:' in str(my_object.style)):
+            my_stroke_color = my_object.style.get_color(name='stroke').to_rgba()
+            my_stroke_color_red = my_stroke_color[0]
+            my_stroke_color_green = my_stroke_color[1]
+            my_stroke_color_blue = my_stroke_color[2]
+            mean_stroke_component_value = mean([my_stroke_color_red, my_stroke_color_blue, my_stroke_color_green])
+
+            if mean_stroke_component_value > 0:
+                mono_opacity = (1 - (mean_stroke_component_value / 256)) * opacity_range
+                mono_opacity = mono_opacity + opacity_lower_threshold
+            else:
+                mono_opacity = opacity_upper_threshold
+
+            my_object.style['stroke'] = str(mono_color)
+            my_object.style['stroke-opacity'] = str(mono_opacity)
+
+
+class GreyToMonoAlpha(inkex.EffectExtension):
+
+    def add_arguments(self, pars):
+        pars.add_argument("--tab")
+        pars.add_argument("--color_picker_mono", type=inkex.colors.Color, default=0)
+        pars.add_argument("--apply_to_type_radio", default=None)
+        pars.add_argument("--opacity_lower_threshold", type=float, default=0)
+        pars.add_argument("--opacity_upper_threshold", type=float, default=1)
+
+    def effect(self):
+        my_objects = self.svg.selected
+        if len(my_objects) < 1:
+            self.msg('Please select some paths first.')
+            return
+        rgba_to_bw_rgba(self, my_objects)
+
+
+if __name__ == '__main__':
+    GreyToMonoAlpha().run()
--- a/extensions/fablabchemnitz/grey_to_monoalpha/meta.json
+++ b/extensions/fablabchemnitz/grey_to_monoalpha/meta.json
@ -0,0 +1,20 @@
+[
+  {
+    "name": "Grey To MonoAlpha",
+    "id": "fablabchemnitz.de.grey_to_monoalpha",
+    "path": "grey_to_monoalpha",
+    "original_name": "Grey to MonoAlpha",
+    "original_id": "org.inkscape.grey_to_monoalpha",
+    "license": "GNU GPL v3",
+    "license_url": "https://gitlab.com/inklinea/grey-to-mono-alpha/-/blob/main/LICENSE",
+    "comment": "",
+    "source_url": "https://gitea.fablabchemnitz.de/FabLab_Chemnitz/mightyscape-1.X/src/branch/master/extensions/fablabchemnitz/grey_to_monoalpha",
+    "fork_url": "https://gitlab.com/inklinea/grey-to-mono-alpha",
+    "documentation_url": "https://stadtfabrikanten.org/display/IFM/Grey+to+MonoAlpha",
+    "inkscape_gallery_url": null,
+    "main_authors": [
+      "gitlab.com/inklinea",
+      "github.com/vmario89"
+    ]
+  }
+]