At 03:02 AM 8/17/00 +0200, Uwe Koloska wrote:
>Hello all!
>
>in de.comp.text.dtp someone posted a test for dtp programs.  They want to
>compare the file size of the printing files.
>
>One object that has to be placed on the page is a circle without a border
>and with a gradient from white (center) to 100 % cyan.  Is there an easy
>way to make this in context (maybe with the help of metapost)?

It happens to be possible using the following code:

% output=pdftex

\setuplayout[width=middle,height=middle]

\setupcolors[state=start]

\starttext

\startstandardmakeup

  \startMPcode
    numeric width ; width := \the\hsize ;
    numeric shade ; shade :=
      define_circular_shade (origin,origin,0,width,white,cyan) ;
    fill fullcircle scaled width withshade shade ;
  \stopMPcode

\stopstandardmakeup

\stoptext

Shading is present for some time, but the method presented here is only
availablein the beta version. [more on this in the metafun manual]

Hans