redhat-fonts/64-redhat-display-vf-fontconfig.conf

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
<!--
  - This scan pattern aims to correct properties to:
  -  * keep consistency between RedHatDisplay and RedHatDisplay-Italic
  -  * provide single family name e.g. Red Hat Display
  -  * provide single familylang because of the above
  -  * provide single style name e.g. like :family=Red Hat Display:style=Light
  -    but :family=Red Hat Display Light:style=Regular
  -  * provide single stylelang because of the above
  -  * set different family name of the variable font pattern to avoid conflict
  -->
<fontconfig>
  <!-- Try to workaround broken family name in RedHatDisplay-Italic.ttf -->
  <!-- For Light -->
  <match target="scan">
    <test name="family" compare="eq">
      <string>Red Hat Display</string>
    </test>
    <test name="style" compare="eq">
      <string>Italic</string>
    </test>
    <test name="style" compare="eq">
      <string>Light Italic</string>
    </test>
    <edit name="style" mode="delete" /> <!-- Drop Italic -->
    <edit name="stylelang" mode="delete" /> <!-- Drop all stylelang once -->
    <edit name="stylelang" mode="append"> <!-- Add single stylelang again -->
      <string>en</string>
    </edit>
  </match>
  <!-- For variable font -->
  <match target="scan">
    <test name="family" compare="eq">
      <string>Red Hat Display</string>
    </test>
    <test name="slant">
      <const>italic</const>
    </test>
    <test name="variable">
      <bool>true</bool>
    </test>
    <edit name="family" mode="assign">
      <!-- Set Italic in family name to avoid confusion for Red Hat Display -->
      <string>Red Hat Display Italic</string>
    </edit>
  </match>
  <!-- Try to workaround broken family name in RedHatDisplay.ttf -->
  <!-- For Light -->
  <match target="scan">
    <test name="family" compare="eq">
      <string>Red Hat Display</string>
    </test>
    <test name="style" compare="eq">
      <string>Regular</string>
    </test>
    <test name="style" compare="eq">
      <string>Light</string>
    </test>
    <edit name="style" mode="delete" /> <!-- Drop Regular -->
    <edit name="stylelang" mode="delete" /> <!-- Drop all stylelang once -->
    <edit name="stylelang" mode="append"> <!-- Add single stylelang again -->
      <string>en</string>
    </edit>
  </match>
  <!-- Generic name assignment -->
  <alias>
    <family>Red Hat Display</family>
    <default>
      <family>sans-serif</family>
    </default>
  </alias>
  <!-- Generic name aliasing -->
  <alias>
    <family>sans-serif</family>
    <prefer>
      <family>Red Hat Display</family>
    </prefer>
  </alias>
</fontconfig>