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drop shadows with metapost/ metafun
by Garulfo 02 Jan '21

02 Jan '21

Which process would you advice to add « drop shadows » to any kind of metafun / metapost figures like: picture p; p := textext("MetaPost is fun!") shifted (10cm,10cm); My current understanding of the required steps : 1- fill p with the shadow color 2- write it to an external metapost file (with savebuffer ?) ready for png export (outputformat := "png »;) 3- with lua, os.execute, and imagemagick prepare the shadow - extent the png file with a transparent background, to have room for blurring - blur it 4- import this png in context / Metapost (externalfigure), and center it with p figure 5- shift it according to the desired shadows distance and angle 6- apply the initial bounding box of p to the shadow, draw the shadow, draw the p picture Actually, all this seems long and tedious, and contrasts with the already existing links between MetaPost / MetaFun and cairo + libpng. Thanks again for your help.

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blank pages bug [pagecolumns]
by Johann Birnick 01 Jan '21

01 Jan '21

Hi there, I noticed a bug when using pagecolumns. If there is a title on the right column, a blank page gets added at the end of the document. For example \starttext \startpagecolumns[n=2] \title{lorem} \title{ipsum} \stoppagecolumns \stoptext gives an additional blank page. If you remove the second title (ipsum) then not. Best regards, Johann

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About \includeMPgraphic and local presets
by Jairo A. del Rio 01 Jan '21

01 Jan '21

Hi, list! I've read elsewhere \MPrawvar allows a preset to be applied outside \start...\stopuseMPgraphic. \startuseMPgraphic{hi} draw fullcircle scaled \MPrawvar{hi}{u}; \stopuseMPgraphic \setupMPvariables[hi][u=1cm] \startMPcode \includeMPgraphic{hi} \stopMPcode However, \includeMPgraphic{...} only accepts one argument. I've come up with a somewhat ugly solution to pass a different value: \begingroup %\start \setupMPvariables[hi][u=2cm] \startMPcode \includeMPgraphic{hi} \stopMPcode \endgroup %\stop %Outside \MPrawvar{hi}{u} will be 1cm What should I do to keep redefinitions local or pass settings only for certain instances of \IncludeMPgraphic{...}? Is there a better solution? Thank you in advance. Best regards and best wishes for this New Year! Jairo

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underbrace spacing
by Johann Birnick 01 Jan '21

01 Jan '21

Hi there, if I do \starttext $4 \underbrace{+ 3}_{\text{because of lorem} + 2}$ \stoptext then the spacing gets really big because of the long. How can I prevent this? (in LaTeX one can use \mathcal or so and that works) Best regards, Johann

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prevent error page
by Johann Birnick 01 Jan '21

01 Jan '21

Hi there, in my setup I constantly have a pdf viewer open showing the output of context. When I recompile the viewer updates. Now if there is an error, the document fails to compile, of course. Previously the pdf file just remainded untouched, nice. But now with LMTX, the pdf will be overwritten with a pdf just saying "error". This makes my pdf viewer crash! I can't work like this. So how to prevent this "error" page and just let context remain the pdf untouched if there is an error? Best regards, Johann

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\startblockquote…\stopblockquote issue
by Alan Bowen 31 Dec '20

31 Dec '20

In the latest standalone ( ConTeXt ver: 2020.12.30 16:45 LMTX fmt: 2020.12.30), \startblockquote and \stopblockquote do not work when I use the key, method=font, or include \setupquotation[method=font]. MWE %\setupquotation[method=font] \setupdelimitedtext[blockquote][ % method=font, before={\blank[small,fixed] \setupnarrower[left=1.5pc,right=0pc] \startnarrower[left,right] \noindentation\switchtobodyfont[9pt]}, after={\par\stopnarrower \blank[small,fixed] \noindentation},] \starttext \input ward \startblockquote \input ward \stopblockquote \stoptext I am attempting to get protrusion of the left double quotation mark into the left margin when possible at the start of a line and do not understand why my block quotations are not appearing as expected. Alan

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Font feature not applied in some cases
by Joseph 31 Dec '20

31 Dec '20

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Minor issue with font kern amount being doubled
by Joseph 31 Dec '20

31 Dec '20

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lmtx: new text & math font stuff
by Hans Hagen 30 Dec '20

30 Dec '20

Hi, As you know, lmtx is also a place for experiments. Currently I'm playing a bit with fonts. Recently (as mentioned a whil eback) I added glyph scaling which permits interesting trickery, although one needs to be aware of how it combines with other features. Here's an example: \def\UnKernedTeX {T% {\glyph xoffset -.2ex yoffset -.4ex `E}% {\glyph xoffset -.4ex options "C0 `X}} \dorecurse{100}{ x \UnKernedTeX} There are alse \glyphxscale cum suis but again, beware that it might influence things when not used grouped. At some point this will be an option in scaled fonts (think of \tfc and such). It saves instances. You can get an idea with: \enableexperiments[text.fonts.compact] The 'text' in this command suggests that we can also do that with math and indeed we have \enableexperiments[math.fonts.compact] These directives have to come *before* loading fonts in order to be effective. Especially the math can bring down the number of font instances: text, script and scriptscript all use the same instance, which is good news. The bad news is that it's up to users to check how this plays out. There are some differences due to the fact that scaling happens elsewhere and otherwise which results in tiny differences (4/5th decimal). As said, these are experiments so ity might progress. I post intermediate versions because that way I can control it better. There is another variant in the planning. Yet another expriment (undecided if that will stay, i played with if before and then rejected it): \enabledirectives[fonts.injections.method=advance] If it stays I probbably have to patch some other code to better suit it. Overall, although in math it add to the overhead, due to the fact that math is hardly demanding (makes only a fraction of the rendering) the memory footprint can be quite a bit lower and performance a bit better (not that much). The measures used in rendering are kind of floating (recalculated often) when these mechanisms are enabled but my impression is that todays compilers make that hardly noticeable. As usual, it opens up possibilities, but of course at the price of testing. 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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Protruding quotation marks obviate narrowed quotations
by Michael Guravage 30 Dec '20

30 Dec '20

Several months ago I posed the following question. When I start a paragraph with a \quote or a \quotation the left quotemark does not protrude, but when I use Unicode quotes it does. I would prefer to use the commands. Any suggestions on how I can achieve proper left protrusion without resorting to Unicode characters? Wolfgang suggested the following lines of code; which worked perfically. \setupquotation [method=font] \setupquote [method=font] Returning to this project after several months I observe that when I use a \start- stopquotation environment, the quotation is not narrowed. The \setupquotation command obviously affects both the \quotation command and \start- stopquotation environment. Is there an elegant way to apply the \setupquotation command and retain the quotation indentation? Cheers, Michael Here's a mwe. \showframe \showgrid \setupwhitespace[medium] % Setup hanging punctuation, less severe style \definefontfeature [default] [default] [protrusion=punctuation,expansion=quality] \setupalign[hz,hanging] % Provide protrusion for quotations. \setupquotation[method=font] % Toggle this line to see the effect. \setupquote[method=font] \starttext \startparagraph \quotation[method=font]{Love makes the world go round,} as an old proverb has it\ldots \stopparagraph \startquotation \input tufte \stopquotation \stoptext

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