\iftextures? (was: [OS X TeX] \colordvi in plain tex)

[Bruno Voisin]

Le 6 mars 05, à 18:24, Frank STENGEL a écrit :

> Le 6 mars 05, à 16:55, Bruno Voisin a écrit :
>
> <snip>
>
>> either dvips, pdfTeX or Textures I defined (with \ifpdf and 
>> \iftextures additional commands, not shown here, testing whether 
>> we're using pdfTeX and Textures):
>
> \ifpdf I know about: it is defined in ifpdf.sty. But how do you define 
> \iftextures?
>
> After googling, the only things I saw are class options that set 
> \iftextures. Is there an automatic way?

No, that was also a manual switch I had put in the letter macro file:

\newif\iftextures
\def\usetextures{\texturestrue}
\def\usestandardtex{\texturesfalse}
\usestandardtex

Similarly \ifpdf was also something that was defined in the macro file, 
but this time automatically:

\newif\ifpdf
\ifx\pdfoutput\undefined
   \pdffalse
\else
   \pdftrue
\fi

ifpdf.sty does essentially the same, but with a lot of tests beforehand 
to look whether the switch has already been defined etc.

Sorry to not have been more explicit. I am not aware of any automatic 
way to detect whether Textures is run, similar to testing for 
\pdfoutput for pdfTeX and \XeTeXversion for XeTeX.

BTW, regarding predefined colors, I mentioned colordvi.tex for dvips 
and pdfcolor.tex for pdfTeX, but forgot, for completeness, 
"/Applications (Mac OS 9)/Textures/TeX Inputs/CrayolaColors" for 
Textures.

Bruno Voisin
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