Re: unwanted rgb-->gray conversion (mkiv)

[Peter Rolf <indiego@gmx.net>]

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Peter Rolf schrieb:
> Hi Hans,
>
> The attached example works fine with mkii (text and gfx both use RGB 
> colors). Using mkiv reduces the colorspace of the graphic to GRAY.
> Sadly PDFX/-4 doesn't allow to mix color profiles of colorspace RGB 
> with GRAY ones. So I'm forced to always use the RGB colorspace...
>
> Best wishes, Peter
> ------------------------------------------------------------------------
>
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mh, the problem is a little more complex. Mkii reduces rgb(0,0,0) text 
into gray(0), in mkiv color is as expected.
Updated the example...

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\setupcolors[state=start]

% all colors are in RGB color space (and should stay there)
\definecolor[rgbgray] [r=.5,g=.5,b=.5]
\definecolor[rgbblack] [r=0,g=0,b=0]
\definecolor[rgbwhite] [r=1,g=1,b=1]

\startuniqueMPgraphic{foo}{size,color}
    fill unitsquare xyscaled(\MPvar{size},\MPvar{size}) withcolor \MPvar{color};
    draw boundingbox currentpicture withcolor \MPcolor{rgbblack};
\stopuniqueMPgraphic

\starttext

\uniqueMPgraphic{foo}{size=2.5cm,color=rgbgray} % unwanted gray conversion (mkiv)
\uniqueMPgraphic{foo}{size=2.5cm,color=rgbblack} % unwanted gray conversion (mkiv)
\uniqueMPgraphic{foo}{size=2.5cm,color=rgbwhite} % unwanted gray conversion (mkiv)
\color[rgbgray] Gray text. % ok
\blank
\color[rgbblack] Black text. % unwanted gray conversion (mkii)
\blank
\framed[background=color,backgroundcolor=rgbblack,foregroundcolor=rgbwhite]
{White text} % unwanted gray conversion of background color (mkii)

\stoptext


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

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________