[NTG-context] efficiently scaling fonts

[Hans Hagen]

Hi,

I uploaded a new lmtx ... in a previous mail i mentioned font scaling 
and I made that two dimensional:

\starttext

\setuplayout[topspace=1cm,header=1cm] \setuplayout[middle]

\setupbodyfont[pagella,10pt]

\setupalign[verytolerant,stretch]

\setupwhitespace[big]

\starttext

\startbuffer
\definescaledfont[bfe][xscale=2000,yscale=6000,style=bf]

\setuphead[chapter][style=\bfe]

\dostepwiserecurse {10} {2020} {10} {
     \title{Here we go #1!}
     \start
     \glyphxscale#1\relax
     \glyphyscale#1\relax
     \setupinterlinespace
     \samplefile{ward}%
     \start
     \bf
     \samplefile{ward}%
     \glyphxscale\numexpr(#1*2)/3\relax
     \glyphyscale#1\relax
     \samplefile{ward}%
     \par
     \stop
     \def\TEST{y = \sqrt{x^2 + 1}^3}%
     \dontleavehmode
     \ruledhbox{\glyphxscale #1                 \glyphyscale #1 
         $\left{\TEST\right}$}
     \ruledhbox{\glyphxscale #1                 \glyphyscale 
\numexpr#1*3\relax $\left{\TEST\right}$}
     \ruledhbox{\glyphxscale \numexpr#1/2\relax \glyphyscale 
\numexpr#1*2\relax $\left{\TEST\right}$}
     \par
     \stop
     \page
}

\stoptext

Best use the high level interface:

\definescaledfont
   [MyLargerFontB]
   [xscale=1200,yscale=2000,style=bold]

test {\MyLargerFontB test {\em test} test} test

etc. Math works too but I need to check soem details which I will do 
later. There are some conceptual decisions to be made there because 
we're nto so much talking of a font but of a 'setup of fonts and 
measures'. (Boldened math can be improved a bit, in general, unrelated 
to this feature.)

Hans


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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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