Hi, > Le 7 sept. 2019 à 16:47, Henning Hraban Ramm <te...@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. ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________
