ConTeXt color to text

ConTeXt color to text

[Peter Rolf]

Hi,

for a batch command (ImageMagick) I need to convert ConTeXt colors to a
text representation (e.g. rgb 'red' -> 'rgb(255,0,0)'; same for color
models cmyk and gray).
What is the best way to get (read only) access to the color channels of
a defined color?


Peter
___________________________________________________________________________________
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  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: ConTeXt color to text

[Hans Hagen]

On 3-9-2012 18:59, Peter Rolf wrote:
> Hi,
>
> for a batch command (ImageMagick) I need to convert ConTeXt colors to a
> text representation (e.g. rgb 'red' -> 'rgb(255,0,0)'; same for color
> models cmyk and gray).
> What is the best way to get (read only) access to the color channels of
> a defined color?

\colorcomponents{red}
\colorvalue{red}

in next beta:

\startluacode

-- inspect(attributes.colors.spec("red"))

-- table={
--  ["b"]=0,
--  ["c"]=0,
--  ["model"]="cmyk",
--  ["g"]=0,
--  ["k"]=0,
--  ["m"]=1,
--  ["r"]=1,
--  ["s"]=0.3,
--  ["y"]=1,
-- }

\stopluacode

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
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  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: ConTeXt color to text

[Peter Rolf]

Am 03.09.2012 20:36, schrieb Hans Hagen:
> On 3-9-2012 18:59, Peter Rolf wrote:
>> Hi,
>>
>> for a batch command (ImageMagick) I need to convert ConTeXt colors to a
>> text representation (e.g. rgb 'red' -> 'rgb(255,0,0)'; same for color
>> models cmyk and gray).
>> What is the best way to get (read only) access to the color channels of
>> a defined color?
> 
> \colorcomponents{red}
> \colorvalue{red}
> 
> in next beta:
> 
> \startluacode
> 
> -- inspect(attributes.colors.spec("red"))
>
Thanks Hans, very nice. Looking out for the next beta. I'll use the time
to check some other problems :-)



> -- table={
> --  ["b"]=0,
> --  ["c"]=0,
> --  ["model"]="cmyk",
> --  ["g"]=0,
> --  ["k"]=0,
> --  ["m"]=1,
> --  ["r"]=1,
> --  ["s"]=0.3,
> --  ["y"]=1,
> -- }
> 
> \stopluacode
> 
> -----------------------------------------------------------------
>                                           Hans Hagen | PRAGMA ADE
>               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
>                                              | www.pragma-pod.nl
> -----------------------------------------------------------------
> 

___________________________________________________________________________________
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  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________