[NTG-context] Arithmetic overflow on placing an external figure in MP

Hans Hagen j.hagen at xs4all.nl
Sun Sep 8 12:43:09 CEST 2019


On 9/7/2019 10:47 PM, Henning Hraban Ramm wrote:
> Bear with me, I still got no experience in MetaPost…
> 
> I’m trying to place a pixel image on a MP page.
> 
> According to the MetaFun manual this should work:
> 
> \startMPpage
> draw externalfigure "mill.png" scaled 5cm shifted (-6cm,0) ;
> \stopMPpage
> 
> And it works with mill.png (copied into my test dir), but with none of my other PNGs, I always get
> 
> ! Arithmetic overflow.
> <*> ...xternalfigure "dodo.png" scaled 5cm shifted
> (-6cm,0) ; ;
> Uh, oh. A little while ago one of the quantities that I was
> computing got too large, so I'm afraid your answers will be
> somewhat askew. You'll probably have to adopt different
> tactics next time. But I shall try to carry on anyway.
> 
> [1]
> 
> 1     \startMPpage

[instance=doublefun]

will bump metapost into doublemode

> 2     draw externalfigure "dodo.png" scaled 5cm shifted (-6cm,0) ;
> 3 >>  \stopMPpage
> 4
> 
> 
> The same image file works with
> 
> \starttext
> \externalfigure[dodo][height=8cm]
> \stoptext
> 
> What’s wrong?
> 
> The image is here:
> https://github.com/fiee/ConTeXt/raw/master/tshirts/img/dodo.png
> 
> 
> Greetlings, Hraban
> ---
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