From: Fabrice L <fabrice.alpha@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Arithmetic overflow on placing an external figure in MP
Date: Sat, 7 Sep 2019 18:16:26 -0400 [thread overview]
Message-ID: <2820C2F5-2B70-4FCB-88EF-B376B4B2119C@gmail.com> (raw)
In-Reply-To: <AC5EF052-8203-4E2C-9660-63D810AD9BAA@fiee.net>
Hi,
> Le 7 sept. 2019 à 16:47, Henning Hraban Ramm <texml@fiee.net> a écrit :
>
> 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
> 2 draw externalfigure "dodo.png" scaled 5cm shifted (-6cm,0) ;
> 3 >> \stopMPpage
> 4
>
I can reproduce your error with MKIV, but this world with lmtx; I think this is just too big for MKIV (I’m not sure why !).
Be aware of the difference between « scaled » and « sized ». You can try:
\starttext
\startMPpage
draw externalfigure "dodo.png" sized 5cm shifted (-6cm,0) ;
\stopMPpage
\stoptext
and try:
\starttext
\startMPpage
draw externalfigure "dodo.png" scaled 0.018cm shifted (0,0) ;
draw ((0,0) -- (5cm,0) -- (5cm,5cm) -- (0,5cm) -- cycle ) withcolor red ;
\stopMPpage
\stoptext
In the second case, your image fits (approximately) in a 5cm square.
Fabrice.
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next prev parent reply other threads:[~2019-09-07 22:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-07 20:47 Henning Hraban Ramm
2019-09-07 22:16 ` Fabrice L [this message]
2019-09-08 10:43 ` Hans Hagen
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