Antoine Cailliau

3. Mai 2016 um 08:58

The \definefontfamily command is limited to the default alternatives (tf, bf, it, sl, bi, bs ans sc).

Thanks for your answer, what shall I use to define non-default alternatives?

At the moment your only option is to write your own typescript for the fonts.

\definefontalternative[sb]
\definefontalternative[si]

\starttypescript [sans] [source-sans]
\definebodyfont [default] [ss]
    [tf=Sans             sa 1,
     it=SansItalic       sa 1,
     sb=SansMedium       sa 1,
     si=SansMediumItalic sa 1,
     bf=SansBold         sa 1,
     bi=SansBoldItalic   sa 1]
\stoptypescript

\starttypescript [sans] [source-sans]
    \definefontsynonym [Sans]             [file:SourceSansPro-Regular.otf]
    \definefontsynonym [SansItalic]       [file:SourceSansPro-It.otf]
    \definefontsynonym [SansMedium]       [file:SourceSansPro-Semibold.otf]
    \definefontsynonym [SansMediumItalic] [file:SourceSansPro-SemiboldIt.otf]
    \definefontsynonym [SansBold]         [file:SourceSansPro-Bold.otf]
    \definefontsynonym [SansBoldItalic]   [file:SourceSansPro-BoldIt.otf]
\stoptypescript

\definetypeface [source] [ss] [sans] [source-sans] [default] [features=default]
\definetypeface [source] [mm] [math] [xits]        [default]

\setupbodyfont[source]

\starttext

Upright {\it Italic} {\sb SemiBold} {\si SemiBoldItalic} {\bf Bold} {\bi BoldItalic}

\stoptext

Wolfgang