On Fri, Dec 11, 2009 at 1:53 PM, Oliver Heins <o...@sopos.org> wrote:
> Hello,
>
> with color black overprinting is not working. You can easily spot this
> when you use the »Ausgabevorschau« (sorry, my acrobat is in german
> locale, must be something with »preview« in english; located in the
> »tools« menu) in acrobat and remove magenta and black from the preview.
> Whilst under the region with the magenta colored text the picture gets
> shown, in the region with the black colored text the text is cut out of
> the picture, leaving white.
>
> I think this is a bug, as overprinting makes most sense with black. It
> happens both in Mark II and IV -- you have to manually copy the
> hacker.jpg to your working directory (under linux e.g. with cp
> $(kpsewhich hacker.jpg) /path/to/your/working/directory) and change the
> path to make the minimal example work under mark iv.
>
> Best regards,
> olli
>
> \setupcolors[state=start,cmyk=yes,rgb=no]
>
> \definelayer [mybg]
> [x=0mm, y=0mm,
> width=\paperwidth, height=\paperheight,
> repeat=yes]
> \setlayer [mybg]
> [hoffset=5cm, voffset=7cm]
> {\externalfigure[sample/hacker.jpg][max]} % mark ii
> % {\externalfigure[hacker.jpg][max]} % mark iv
> \setupbackgrounds[page][background=mybg]
>
> \starttext
>
> {\bf With foregroundcolor = magenta.}
> \color[magenta]
>
> \startoverprint
> \input tufte
> \stopoverprint
>
> \color[black]
> {\bf With foregroundcolor = black. \color[magenta](Some magenta
> without overprint)}
> \color[black]
>
> \startoverprint
> \input tufte
> \stopoverprint
>
> \stoptext
>
> --
hm I believed was
\color[red]{......}
and
\startcolor[red]
...
\stopcolor
see
http://wiki.contextgarden.net/Colors
--
luigi
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