Re: [NTG-context] TikZ \shade broken

[Hans Hagen via ntg-context <ntg-context@ntg.nl>]

On 6/17/2023 7:28 PM, Gavin via ntg-context wrote:
> Hi List,
> 
> First, a big thanks to Aditya for solving the missing pgfsys-luatex.def! That was a show-stopper on my Mac.
> 
> Now that I can use TikZ again, I am running into a problem with the \shade command. Below is a small working example from the TikZ manual [pp.39-41]. The first tikzpicture is the example. The second TikZ picture is similar, but without any shading.
> 
> \usemodule[tikz]
> \starttext
> \starttikzpicture
> \shade[top color=yellow,bottom color=black] (0,0) rectangle +(2,1);
> \shade[left color=yellow,right color=black] (3,0) rectangle +(2,1);
> \shadedraw[inner color=yellow,outer color=black,draw=yellow] (6,0) rectangle +(2,1);
> \shade[ball color=green] (9,.5) circle (.5cm);
> \stoptikzpicture
> \starttikzpicture
> \draw[color=black] (0,0) rectangle +(2,1);
> \fill[color=yellow] (3,0) rectangle +(2,1);
> \filldraw[fill=black,draw =yellow] (6,0) rectangle +(2,1);
> \fill[fill=green] (9,.5) circle (.5cm);
> \stoptikzpicture
> \stoptext
> \stoptext
> 
> The second picture works. The first picture produces quite an error message (below). I’m using
> 
> ConTeXt  ver: 2023.06.01 09:42 LMTX  fmt: 2023.6.2
> 
> on an M1 Mac with Ventura 13.4
> 
> Any help would be greatly appreciated!
> 
> Gavin
> 
> 
> 
> tex error       > tex error on line 8 in file ./TikZtest.tex: Valid keyword expected, likely 'direction'
> 
> <macro> \pgfsys@vertshading
> #1#2#3->{\pgf@parsefunc {#3}\pgfmathparse {#2}\setbox \pgfutil@tempboxa =\hbox dir
> TLT to\pgfmathresult pt{\vbox to\pgf@max {\vfil \pgfsys@invoke {/Sh sh}}\hfil }\pgf@process {\pgfpoint {#2}{\pgf@max }}\immediate \saveboxresource resources {/Shading
luametatex doesn't have the dir keyword

(I could probably add it in a simplified form just for this purpose 
because the performance penalty is less now.)

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
-----------------------------------------------------------------

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : https://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : https://contextgarden.net
___________________________________________________________________________________