[NTG-context] Re: PDF, runner, and TikZ patches

[Hans Hagen <j.hagen@xs4all.nl>]

On 3/15/2024 12:53 AM, Jim wrote:
> Max (et al),
> 
> were you hoping the ConTeXt distribution would ship its own
> pgfutil-context.def, or were you hoping that someone could convince Henri
> to put the RGB change in?
> 
> And, if anyone has the will to push this (or add it in to a ConTeXt
> distribution version), I'd still like the cmyk support, even if there is no
> ability to specify colour profiles:
> 
> \def\pgfutil@emu@cmyk#1#2,#3,#4,#5\@nil
> {
>      \pgfmathsetmacro{\@red@}{(1 - #2) * (1 - #5)}%
>      \pgfmathsetmacro{\@green@}{(1 - #3) * (1 - #5)}%
>      \pgfmathsetmacro{\@blue@}{(1 - #4) * (1 - #5)}%
>      \expandafter\edef\csname\string\color@#1\endcsname
>      {\noexpand\xcolor@ {}{}{rgb}{\@red@,\@green@,\@blue@}}
> }
> 
> I don't see that it would hurt anything, even if it doesn't give complete
> cmyk support.
We provide

\pgf@context@registercolor
\pgf@context@registergray
\pgf@context@registerrgb
\pgf@context@registercmyk

in colo-ini that hook into the context color mechanism so be careful 
with patches. I'm not going to spend time on other solutions that can 
interfere with internals.

(I wonder when the moment comes that we have to take a snapshot of tikz 
and stay with that.)

Hans

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