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From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Cc: Marco <netuse@lavabit.com>
Subject: Re: ConTeXt colours in TikZ
Date: Tue, 15 May 2012 16:11:10 +0200	[thread overview]
Message-ID: <4FB263FE.5050407@wxs.nl> (raw)
In-Reply-To: <20120515121602.639cc961@Zewz>

On 15-5-2012 12:16, Marco wrote:
> Hi everybody,
>
> I don't get context colours working in tikz. There were several
> issues on the mailing list in the past and the solution always seems
> to be some kind of hack. But none of the hacks work (with a current
> context). Example:
>
> \usemodule   [tikz]
> \definecolor [darkblue] [b=.2]
> \starttext
>    \starttikzpicture
>      % works
>      \fill [blue] (0,0) circle(1);
>
>      % fails
>      % \fill [darkblue] (0,0) circle(1);
>    \stoptikzpicture
> \stoptext
>
> I get the following error:
>
> Runaway argument?
> 0 0 0.2 rg 0 0 0.2 RG\pgf@stop {darkblue}\else \edef \pgf@marshal {\noexpand \ETC.
> ! File ended while scanning use of \pgfutil@context@parse@gray.
>
> system>  tex>  error on line 0 in file : File ended while scanning use of \pgfutil@conte
> xt@parse@gray ...
>
> <empty file>
>
> <inserted text>
>                  \par

In pgfutil-context.def there is a macro

\def\pgfutil@registercolor#1{%
   \edef\pgf@temp{\PDFcolor{#1}}%
   \edef\pgf@marshal{\noexpand\pgfutil@in@{g}{\pgf@temp}}%
   \pgf@marshal
   \ifpgfutil@in@
     \expandafter\pgfutil@context@parse@gray\pgf@temp\pgf@stop{#1}%
   \else
     \edef\pgf@marshal{\noexpand\pgfutil@in@{rg}{\pgf@temp}}%
     \pgf@marshal
     \ifpgfutil@in@
       \expandafter\pgfutil@context@parse@rgb\pgf@temp\pgf@stop{#1}%
     \else
       \edef\pgf@marshal{\noexpand\pgfutil@in@{k}{\pgf@temp}}%
       \pgf@marshal
       \ifpgfutil@in@
         \expandafter\pgfutil@context@parse@cmyk\pgf@temp\pgf@stop{#1}%
       \else
         \PackageError{pgf}{Color #1 has an unsupported color model.}{}%
         \pgfutil@definecolor{#1}{gray}{0}%
       \fi
     \fi
   \fi
}

which tests for gray (g) before rgb (rg) but I think should reverse that 
order

\def\pgfutil@registercolor#1{%
   \edef\pgf@temp{\PDFcolor{#1}}%
   \edef\pgf@marshal{\noexpand\pgfutil@in@{rg}{\pgf@temp}}%
   \pgf@marshal
   \ifpgfutil@in@
     \expandafter\pgfutil@context@parse@rgb\pgf@temp\pgf@stop{#1}%
   \else
     \edef\pgf@marshal{\noexpand\pgfutil@in@{g}{\pgf@temp}}%
     \pgf@marshal
     \ifpgfutil@in@
       \expandafter\pgfutil@context@parse@gray\pgf@temp\pgf@stop{#1}%
     \else
       \edef\pgf@marshal{\noexpand\pgfutil@in@{k}{\pgf@temp}}%
       \pgf@marshal
       \ifpgfutil@in@
         \expandafter\pgfutil@context@parse@cmyk\pgf@temp\pgf@stop{#1}%
       \else
         \PackageError{pgf}{Color #1 has an unsupported color model.}{}%
         \pgfutil@definecolor{#1}{gray}{0}%
       \fi
     \fi
   \fi
}

feel free to test this and submit it as patch to the tikz maintainers.

For mkiv the whole checker/converter can be replaced by a few lines of 
code but I won't bother you with that.

Hans



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  reply	other threads:[~2012-05-15 14:11 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-15 10:16 Marco
2012-05-15 14:11 ` Hans Hagen [this message]
2012-05-15 15:31   ` Marco
2012-05-18  8:36     ` Philipp A.
2012-05-18 12:25       ` Marco

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