[NTG-context] Scale image in MetaPost, maintaining aspect ratio

[Hans Hagen]

On 7/7/2018 8:58 PM, Marco Patzer wrote:
> Hi!
> 
> How to scale an image in MetaPost, maintaining the aspect ratio
> (without specifying the height explicitly)?
> 
> Example:
> 
> \setupexternalfigures [location=default]
> \starttext
>    \externalfigure [cow][width=5cm]
> 
>    \startMPcode
>      draw externalfigure "cow" scaled 5cm;
>    \stopMPcode
> \stoptext
it's all in the metafun manual

xsized 5cm

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