Alan Bowen

2. Oktober 2017 um 14:04

I need to substitute the regular and italic characters of a publisher’s non-math font (Unicode) for those in a math font.

The non-math addresses are:
0041-005A, 0061-007A %italic uppercase and lowercase
0391-03A9, 03B1-03C9 %slanted Greek uppercase and lowercase

The math addresses are:
1D434-1D44D, 1D44E-1D467 %italic uppercase and lowercase
1D6E2-1D6FA, 1D6FC-1D714 %slanted Greek uppercase and lowercase

Is there a way to use the \definefallbackfamily mechanism that does not assume that the characters have the same Unicode addresses? Or is some other approach required?

The fallback mechanism provides a offset key which lets you replace a math character with a normal text character.

\definefontfamily [mainface] [ss] [TeX Gyre Heros]

\definefallbackfamily [mainface] [mm] [TeX Gyre Heros] [preset=math:lowercasenormal]
\definefallbackfamily [mainface] [mm] [TeX Gyre Heros] [preset=math:lowercaseitalic]
\definefallbackfamily [mainface] [mm] [TeX Gyre Heros] [tf=style:italic,range=0x68,offset=0x210E]% lowercase italic h
\definefallbackfamily [mainface] [mm] [TeX Gyre Heros] [preset=math:lowercasebold]
\definefallbackfamily [mainface] [mm] [TeX Gyre Heros] [preset=math:uppercasenormal]
\definefallbackfamily [mainface] [mm] [TeX Gyre Heros] [preset=math:uppercaseitalic]
\definefallbackfamily [mainface] [mm] [TeX Gyre Heros] [preset=math:uppercasebold]

\definefontfamily [mainface] [mm] [TeX Gyre Pagella Math]

\starttext

\setupbodyfont[pagella]

Lowercase: $ {\tf abc} {\it abc} {\bf abc} $

Uppercase: $ {\tf ABC} {\it ABC} {\bf ABC} $

\setupbodyfont[mainface]

Lowercase: $ {\tf abc} {\it abch} {\bf abc} $

Uppercase: $ {\tf ABC} {\it ABC} {\bf ABC} $

\stoptext

Wolfgang