colors without \definecolor

colors without \definecolor

[Philipp Gesang]

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Hi all,


I understand that in order to use a color with \color[somecolor]{colored
text} I first have to \definecolor[somecolor][r=.4,g=0,b=1].  Currently
I'm trying to do automated colorizing with the help of some lua code and
I'd like to make up rgb vectors on the spot without having to
\definecolor them first, e.g. something like \color[r=.4,g=0,b=1]
{colored text}.  Is there a way to achieve this in mkiv?  (Right now I'm
assigning new rgb values to the same color "name" whenever the function
is called that concatenates the next \color[]{} statement.  This seems a
bit verbose and hacky to me.)

Thanks in advance,


Philipp
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Re: colors without \definecolor

[Wolfgang Schuster]

Am 04.02.10 21:41, schrieb Philipp Gesang:
> Hi all,
>
>
> I understand that in order to use a color with \color[somecolor]{colored
> text} I first have to \definecolor[somecolor][r=.4,g=0,b=1].  Currently
> I'm trying to do automated colorizing with the help of some lua code and
> I'd like to make up rgb vectors on the spot without having to
> \definecolor them first, e.g. something like \color[r=.4,g=0,b=1]
> {colored text}.  Is there a way to achieve this in mkiv?  (Right now I'm
> assigning new rgb values to the same color "name" whenever the function
> is called that concatenates the next \color[]{} statement.  This seems a
> bit verbose and hacky to me.)

\colored[r=...,g=...,b=...]{...}

or

{\colored[r=...,g=...,b=...]...}

Wolfgang

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Re: colors without \definecolor

[Philipp Gesang]

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Wolfgang, all,
On 2010-02-05 <08:31:35>, Wolfgang Schuster wrote:
> \colored[r=...,g=...,b=...]{...}
> or
> {\colored[r=...,g=...,b=...]...}
Thank you very much, I wikified it.  Is there a difference (other than
syntax) between \colored[rgb] and the according \definecolor[name][rgb]
-- \color[name] commands?

Philipp

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Re: colors without \definecolor

[Wolfgang Schuster]

Am 05.02.10 15:49, schrieb Philipp Gesang:

> Is there a difference (other than
> syntax) between \colored[rgb] and the according \definecolor[name][rgb]
> -- \color[name] commands?

No, \colored is \definecolor + \color except you can use it in the form

\colored[rgb]{...}

and

{\colored[rgb]...}

while \color can only be used as

\color[rgb]{...}.

Wolfgang
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Re: colors without \definecolor

[Aditya Mahajan]

On Sat, 6 Feb 2010, Wolfgang Schuster wrote:

> Am 05.02.10 15:49, schrieb Philipp Gesang:
>
>> Is there a difference (other than
>> syntax) between \colored[rgb] and the according \definecolor[name][rgb]
>> -- \color[name] commands?
>
> No, \colored is \definecolor + \color except you can use it in the form
>
> \colored[rgb]{...}
>
> and
>
> {\colored[rgb]...}
>
> while \color can only be used as
>
> \color[rgb]{...}.

No. Both \color[rgb]{...} and {\color[rgb]...} are valid

\definecolor[myred][r=0.65]

\starttext
{normal text \color[myred]{red text} normal text}

{normal text {\color[myred]red text} normal text}
\stoptext

Aditya
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Re: colors without \definecolor

[Wolfgang Schuster]

Am 07.02.10 07:24, schrieb Aditya Mahajan:
>> while \color can only be used as
>>
>> \color[rgb]{...}.
> No. Both \color[rgb]{...} and {\color[rgb]...} are valid
D’oh. I looked in the source and missed this but I wonder
if this had been always the case because the manuals
{and the wiki) mention only \color[name]{...}.

Wolfgang

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Re: colors without \definecolor

[Mojca Miklavec]

On Sun, Feb 7, 2010 at 22:56, Wolfgang Schuster wrote:
> Am 07.02.10 07:24, schrieb Aditya Mahajan:
>>>
>>> while \color can only be used as
>>>
>>> \color[rgb]{...}.
>>
>> No. Both \color[rgb]{...} and {\color[rgb]...} are valid
>
> D’oh. I looked in the source and missed this but I wonder
> if this had been always the case because the manuals
> {and the wiki) mention only \color[name]{...}.

\colored is a rather recent command.

Mojca
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Re: colors without \definecolor

[Wolfgang Schuster]

Am 08.02.10 09:19, schrieb Mojca Miklavec:

>> D’oh. I looked in the source and missed this but I wonder
>> if this had been always the case because the manuals
>> (and the wiki) mention only \color[name]{...}.
>
> \colored is a rather recent command.

I meant the manuals and wiki mention \color[name]{...}
but not the form {\color[...]...}.

Wolfgang
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Re: colors without \definecolor

[Hans Hagen]

On 7-2-2010 22:56, Wolfgang Schuster wrote:
> Am 07.02.10 07:24, schrieb Aditya Mahajan:
>>> while \color can only be used as
>>>
>>> \color[rgb]{...}.
>> No. Both \color[rgb]{...} and {\color[rgb]...} are valid
> D’oh. I looked in the source and missed this but I wonder
> if this had been always the case because the manuals
> {and the wiki) mention only \color[name]{...}.

all commands that use \groupedcommand have that property


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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
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Re: colors without \definecolor

[Wolfgang Schuster]

Am 08.02.10 09:40, schrieb Hans Hagen:

>> D’oh. I looked in the source and missed this but I wonder
>> if this had been always the case because the manuals
>> {and the wiki) mention only \color[name]{...}.
>
> all commands that use \groupedcommand have that property

But used \color always \groupedcommand or was this added later and the 
original definition was what is mentioned in the manual (\color[]{})?

Wolfgang
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Re: colors without \definecolor

[Hans Hagen]

On 8-2-2010 9:55, Wolfgang Schuster wrote:
> Am 08.02.10 09:40, schrieb Hans Hagen:
>
>>> D’oh. I looked in the source and missed this but I wonder
>>> if this had been always the case because the manuals
>>> {and the wiki) mention only \color[name]{...}.
>>
>> all commands that use \groupedcommand have that property
>
> But used \color always \groupedcommand or was this added later and the
> original definition was what is mentioned in the manual (\color[]{})?

it's a very old command so it might not have used groupedcommand in the past

also, at the time of manual writing no groupedcommand like things were 
there anyway

but .. there's another reason ...

\color{...} does not grab an argument but does some aftergroup trickery 
so it might not work in all cases

also in mkii we inject literals and we could end up with dangling revert 
color cases being nodes that could interfere somehow

mkiv is more robust

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
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