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colors in MetaPost
by Henning Hraban Ramm 11 Sep '19

11 Sep '19

Hi, I’m trying to get a linear shade in the background of my presentation. But it seems like MetaPost can’t handle my self-defined colors: \definecolor[VerlaufVon][c=75,m=5,y=95,k=60] \definecolor[VerlaufNach][c=88,m=95,y=5,k=60] \startuniqueMPgraphic{Verlauf} % old method, also doesn’t work % path p ; % p := unitsquare xscaled \overlaywidth yscaled \overlayheight ; % linear_shade(p,6,\MPcolor{VerlaufVon},\MPcolor{VerlaufNach}) ; fill fullsquare xyscaled (\overlaywidth,\overlayheight) withshademethod "linear" withshadevector (0.5,2.5) %withshadedirection shadedup withshadecolors ("VerlaufVon", "VerlaufNach") ; \stopuniqueMPgraphic \defineoverlay[verlaufen][\useMPgraphic{Verlauf}] \setupbackgrounds[paper][background={verlaufen}] \starttext \strut \stoptext The background consists of a blue and a green area instead of a shade. While testing I sometimes got a few more stripes in the top and bottom area, can’t reproduce any more. I also tried RGB and hex (HTML) definitions. Predefined colors work. According to the MetaFun manual, either \MPcolor{name} or just "name" should work. What’s wrong? Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD

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context (lmtx) segfaults on x86_64 linux
by Vladimir Lomov 11 Sep '19

11 Sep '19

Hello, today I updated lmtx and on simple $ context --version I get segfault (in the same time luametatex --version works fine). Running under gdb shows me that the problem might be in one of 'realloc' calls. The context from Context Suite (mkiv) works fine. P.S. I tested on two systems, both runs Archlinux x86_64. --- WBR, Vladimir Lomov -- Carelessly planned projects take three times longer to complete than expected. Carefully planned projects take four times longer to complete than expected, mostly because the planners expect their planning to reduce the time it takes.

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\date is calculated wrong
by Martin Althoff 11 Sep '19

11 Sep '19

Hi all, the \date is output wrong. Whatever value is given for d= I get the 11th. That is todays date. Not sure what would happen tomorrow Thanks for any fix suggestions. \starttext \date[d=16,m=9,y=2019][weekday, day,{. }, month, year] \stoptext

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Pb with tikz, \pdfsavepos and friends
by Jean-Philippe Rey 10 Sep '19

10 Sep '19

Dear all, I just downloaded the last ConTeXt beta (ConTeXt ver: 2019.09.09 13:44 MKIV beta) and encountered a problem with pgf/tikz. Here a minimum failing example : ================= \usemodule[tikz] \starttext \starttikzpicture[remember picture] \stoptikzpicture \stoptext ================= which produces the following error (excerpt from the log file, see complete log attached) ================= tex error > tex error on line 4 in file /Users/jprey/Projets/ConTeXt/bug-savepos.tex: ! Undefined control sequence \pgfsys@markposition #1->\pdfsavepos \edef \pgf@temp {#1}\expandafter \pgfut... \endpgfpicture ...ys@markposition {\pgfpictureid } }\fi \ifdim \pgf@picmaxx =... \stoptikzpicture ...st@from@global \endpgfpicture \endgroup l.4 \stoptikzpicture ================= My previous ConTeXt version from September 2018 works fine with the same example. I searched the mailing list archives and found a thread from January 2016 pertaining to the same problem. The workaround given by Hans works for me : \let \pdfsavepos \savepos \let \pdflastxpos \lastxpos \let \pdflastypos \lastypos I checked the pgf versions in my ConTeXt installations from 20180913 and 20190909, they are the same : 3.0.1. So I suppose that the change comes from ConTeXt itself, that’s why I report the problem here. Regards, -- Jean-Philippe Rey jean-philippe.rey(a)centralesupelec.fr 91192 Gif-sur-Yvette Cedex - France Empreinte PGP : 807A 5B2C 69E4 D4B5 783A 428A 1B5E E83E 261B BF51

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typo in metafun manual
by Damien Thiriet 10 Sep '19

10 Sep '19

Hi, There may be a typo in metafun manual, page 104 Hopefully the next explains a bit how it works (you can find explanations zon the internet). Sounds too Dutch for me… Regards, Damien Thiriet

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Problem of displaying a date with a macro
by Fabrice Couvreur 09 Sep '19

09 Sep '19

Hello, The date display is incorrect : I get day 28 instead of day 2. Thank you Fabrice \defineframed [headerframed] [frame=off, height=fit, width=fit] \definecolor[ColorA][0.8(white)] \startsetups [headertext] \setupheadertexts [{\startframed [headerframed] [foregroundstyle=bold,background=framewithshadow] \getvariable{headertext}{title} n\high{o}\,\getvariable{headertext}{number} \stopframed}] \setupheadertexts [{\startframed [headerframed] [align=flushleft,foregroundstyle=] Lycée LA SALLE, Lille\\ \getvariable{headertext}{location} \stopframed}] [{\startframed [headerframed] [align=flushright,foregroundstyle=] \date[d=\getvariable{headertext}{day},m=\getvariable{headertext}{month},y=\getvariable{headertext}{year}] \stopframed}] \stopsetups \setvariable{headertext}{set}{\directsetup{headertext}} \startuseMPgraphic{framewithshadow} path p; p:=origin--(OverlayWidth,0)--(OverlayWidth,OverlayHeight)--(0,OverlayHeight)--cycle; fill p shifted (2,-2); fill p withcolor 0.8white; draw p; setbounds currentpicture to p; \stopuseMPgraphic \defineoverlay[framewithshadow][\useMPgraphic{framewithshadow}] \starttext \setvariables [headertext] [title={Devoir maison}, number={6}, day={02}, month={09}, year={2019}, location={Seconde B}, time={}] \input knuth \stoptext

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no pagenumber depending of number of lines?
by Henning Hraban Ramm 08 Sep '19

08 Sep '19

Hi, I got a difficult customer… If the last page of a chapter is less then half full (or has less than n lines), he doesn’t want a page number. Is there a simple solution to that request? Otherwise I delete the page numbers from the PDF... Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD

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metafun 2
by Hans Hagen 08 Sep '19

08 Sep '19

Hi, In the process of providing an additional (more abstract) interface to some of the old and also new MetaFun code we wonder what kind of features users would like to see. http://www.pragma-ade.com/general/magazines/mag-1104-mkiv.pdf As a teaser I uploaded a MyWay document that shows some of what is coming. All is experimental but it shows the direction. We're talking ConTeXt LMTX here. For instance, draw lmt_outline [ content = "hello", kind = "reverse", fillcolor = "darkred", drawcolor = "darkblue", rulethickness = 1/2, ] ysized h shifted (3.75h,-1.25h) ; Wraps all the outline drawing in one macro with a set of options (there will be xml interface definitions for that). Or take: draw lmt_followtext [ content = "How well does it work {\bf 1}! ", path = (fullcircle scaled 4cm), trace = true, spread = true, ] ysized 5cm ; which is an easier interface to text along a curve. Arrows can be drawn with draw lmt_arrow [ kind = "draw", location = "middle", alternative = "curved", path = fullcircle scaled 3cm shifted (3.5cm,0cm), ] withcolor "darkblue" ; but of course the low level interface with its many variables for tweaking stays around. Other examples are shown in the mentioned document. So the question is: What do you miss in metapost support? Of course it should fit within the concept, so 'artistic freehand drawings' is not something that is likely to get interfaced. We are particularly interested in educational applications, if only because ConTeXt started out that way. Hans ----------------------------------------------------------------- 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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Overfull hbox issues: different font,
by Julian G 08 Sep '19

08 Sep '19

Hello everyone, I apologize if this has been brought up already (or if my mistake is painfully obvious), but I'm having a slight issue with overfull hboxes. I think it is connected to hyphenation and/or using different fonts. Test file: at the end of this mail or at https://gist.github.com/JulianGmp/fe20df633554f5aff02e02eb47a6780f The output PDF I got: https://i.imgur.com/c8S7Di5.png Best regards, Julian % Compiled document (screenshot): % https://i.imgur.com/c8S7Di5.png \setuppapersize[A4] \showframe \setuplayout[ topspace=1cm, header=0cm, width=16cm, footer=0cm, bottom=1cm, ] \definefontfamily[arialFamily] [sans] [Arial] \definefontfamily[calibriFamily] [sans] [Calibri] % \setupbodyfont[myfontfamily, 12pt] \define\printExample{Es kann allerdings ein Problem auftreten: Es ist nicht immer eindeutig, ob die gemessen Phasenerschiebung eine komplette Umdrehung enthaltem. Angenommen sei eine gemessene Verschiebung von \m{\Delta_{\varphi}}, visualisiert in Abbildung 10 ... \blank[small] Zwar wird dadurch eine gewisse Übersicht geschaffen, jedoch werden potentielle Namens- konflikte nicht verhindert.} \starttext \language[de] \section{Standard Font} \subsection{German} \language[de] \printExample{} \subsection{English} \language[en] \printExample{} \switchtobodyfont[arialFamily, 12pt] \section{Arial 12pt} \subsection{German} \language[de] \printExample{} \subsection{English} \language[en] \printExample{} \page \switchtobodyfont[calibriFamily, 14pt] \section{Calibri 14pt} \subsection{German} \language[de] \printExample{} \subsection{English} \language[en] \printExample{} \stoptext

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Arithmetic overflow on placing an external figure in MP
by Henning Hraban Ramm 08 Sep '19

08 Sep '19

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 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 --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD

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