Hello,
Another problem with PGF+ConTeXt is the handling of cmyk colors:
\usemodule[tikz]
\setupcolors[state=start]
\definecolor[my_yellow][c=0,m=0.3,y=0.94,k=0]
\starttext
\startcolor[my_yellow]
Yellow text.
\stopcolor
\starttikzpicture
\fill[my_yellow] (0,0) circle(1);
\stoptikzpicture
\stoptext
CMYK colors work in ConTeXt but do not get passed correctly to PGF/TikZ.
A work-around is to transform to rgb :
\definecolor[my_yellow][r=0.98,g=0.698,b=0.09] % 250,178,23 #FAB217
This seems to be a documented bug; Perhaps it will be fixed someday...
Alan
On Tuesday 19 February 2008 04:47:35 Aditya Mahajan wrote:
> On Mon, 18 Feb 2008, Jesse Alama wrote:
> > Hi Aditya,
> >
> > Thanks for the help -- I think I now see why there is such trouble with
> > colors in pgf and context. It looks like one can systematically
> > transform LaTeX-like PGF examples of \color into ConTeXt examples.
> >
> > The reason why this came up is that I'm trying to go through Till
> > Tantau's "Example for Karl's Students" tutorial in the PGF/TikZ manual.
> > Has anyone managed to ConTeXt-ify that example?
>
> I did that some time back while testing tikz. I will send that file as a
> reply to this email, since I am not sure if it will go through the mailing
> list because of its size.
>
> > The example features some \definecolor's which I just did away with
> > (sadly) by simply substituting their defining values for their
> > occurences. (This is unfortunate, but perhaps necessary until some
> > other mechanism is produced.) The problem is that the text box to the
> > right of the picture is supposed to be colored, and with rounded
> > corners. But the box is missing. Look at p. 20 of
>
> The TikZ manual make a lot of uses of the xcolor syntax (e.g.
> \color{red!20}). There is no equivalent ConTeXt syntax. You need to define
> a color, say lightred, as follows
>
> \definecolor[lightred][r=0.2]
>
> For tikz key-value options, pgf works behind the scene to define
> appropriate colors, so xcolor syntax works for them. So
> \fill[fillcolor=red!20] will work as expected. However, when using \color
> inside any box, you need to follow ConTeXt syntax. So \color[red!20] will
> not work, you need to define a context color and then use that.
>
> Hope that this clarifies some things.
>
> Aditya
> ___________________________________________________________________________
>________ 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
> ___________________________________________________________________________
>________
--
Alan Braslau
CEA DSM-IRAMIS-SPEC
CNRS URA 2464
Orme des Merisiers
91191 Gif-sur-Yvette cedex FRANCE
tel: +33 1 69 08 73 15
fax: +33 1 69 08 87 86
mailto:[EMAIL PROTECTED]
http://www-dna2006.cea.fr/
.''`.
: :' :
`. `'`
`-
___________________________________________________________________________________
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
___________________________________________________________________________________
