# Easy font substitution

Copyright:
  © 2010 Günter Milde
Contributor:

  Special thanks to Ulrike Fischer who provided the indirect definition with active \nfss@catcodes.

Licence:

  This work may be distributed and/or modified under the conditions of the LaTeX Project Public License, either version 1.3 of this license or any later version.

Identification:

      \NeedsTeXFormat{LaTeX2e}
      \ProvidesPackage{substitutefont}
      [2023-08-13 v0.1.6 combine font families (obsolete)]

Abstract

Provide the \substitutefont macro for defining substitute fonts for specified font encodings.

Changelog:

  2010-11-04 | 0.1 | initial version
  2012-04-30 | 0.1.1 | documentation update, upload to CTAN
  2012-07-05 | 0.1.2 | documentation/example update
  2012-07-07 | 0.1.3 | bugfix (comment usage example)
  2013-11-04 | 0.1.4 | documentation update
  2023-08-13 | 0.1.5 | declare obsolete, update documentation and tests
  2023-08-17 | 0.1.6 | documentation fixes

## Usage

The macro \substitutefont{<encoding>}{<family>}{<new-family>} selects the font <new-family> as replacement for <family> if the font encoding is <encoding> in the variants “normal”, “italic”, “slanted”, and “small-caps” and the shapes “medium”, “bold”, and “bold-extended”.

Example:

  Palatino with the standard package mathpazo for Latin and GFS Didot for Greek:

      \usepackage[sc,slantedGreek]{mathpazo}
      \usepackage{substitutefont}
      \substitutefont{LGR}{\rmdefault}{udidot}

## Implementation

    \begingroup
    \nfss@catcodes
    \newcommand*{\substitutefont}[3]{%
     \DeclareFontFamily{#1}{#2}{}
     \DeclareFontShape{#1}{#2}{m}{n}{<->ssub * #3/m/n}{}
     \DeclareFontShape{#1}{#2}{m}{it}{<->ssub * #3/m/it}{}
     \DeclareFontShape{#1}{#2}{m}{sl}{<->ssub * #3/m/sl}{}
     \DeclareFontShape{#1}{#2}{m}{sc}{<->ssub * #3/m/sc}{}
     \DeclareFontShape{#1}{#2}{b}{n}{<->ssub * #3/b/n}{}
     \DeclareFontShape{#1}{#2}{b}{it}{<->ssub * #3/b/it}{}
     \DeclareFontShape{#1}{#2}{b}{sl}{<->ssub * #3/b/sl}{}
     \DeclareFontShape{#1}{#2}{b}{sc}{<->ssub * #3/b/sc}{}
     \DeclareFontShape{#1}{#2}{bx}{n}{<->ssub * #3/bx/n}{}
     \DeclareFontShape{#1}{#2}{bx}{it}{<->ssub * #3/bx/it}{}
     \DeclareFontShape{#1}{#2}{bx}{sl}{<->ssub * #3/bx/sl}{}
     \DeclareFontShape{#1}{#2}{bx}{sc}{<->ssub * #3/bx/sc}{}
    }
    \global\let\substitutefont\substitutefont
    \endgroup