rounded_corners.inx

<?xml version="1.0" encoding="UTF-8"?>
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
  <_name>Custom rounded corners rect</_name>
  <id>org.inkscape.render.rounded</id>
  <dependency type="executable" location="extensions" _description="Generate rectangle with rounded corners as a path.">rounded_corners.py</dependency>
  <dependency type="executable" location="extensions">simplepath.py</dependency>
  <dependency type="executable" location="extensions">inkex.py</dependency>

  <param name="top-left" type="float" _gui-text="top-left" max="999">0</param>
  <param name="top-right" type="float" _gui-text="top-right" max="999">0</param>
  <param name="bottom-right" type="float" _gui-text="bottom-right" max="999">0</param>
  <param name="bottom-left" type="float" _gui-text="bottom-left" max="999">0</param>
  <param name="remove-original" type="boolean" _gui-text="remove original rect">false</param>
  <param name="inherit-style" type="boolean" _gui-text="inherit style of rect">true</param>

  <effect needs-live-preview="false">
    <object-type>all</object-type>
    <effects-menu>
      <submenu _name="Render"/>
    </effects-menu>
  </effect>

  <script>
    <command reldir="extensions" interpreter="python">rounded_corners.py</command>
  </script>
</inkscape-extension>