[pdftex] hello and color question

[pawcoo]

Thanks Hans for Your answer. Now things are clear.

Hans Hagen wrote:
> At 21:57 15/04/2004, you wrote:
> 
>> or do it in smarter way with TeX definitions, but is there any PDF 
>> operator like save_color / restore_color?
> 
> 
> since color can end up anywhere and the order of flushing can be any, 
> and since there are many color models and occasional interactions with 
> other mechanisms, a fool proof color mechanism is very tight to a 
> macro-set (feature set).
> 
>> 2. Graphic state of PDF page is restored to defaults at the begining 
>> of each page. Therefore the following code
>>
>> \pdfliteral{.1 .2 .3 .4 k}
>> first page
>> \vfill\eject
>> second one
>> \end
>>
>> will produce only first page colorized. Is there any way to set some 
>> color for the whole documents expect invoking \pdfliteral{...} in 
>> output routines? Is it possible to do that with \pdfpagesattr?
> 
> 
> you can of course hook it into the shipout: remember the current color 
> and reset it at the start of a page (which of course is different for 
> each macro package since there are different models for 
> headers/footers/flushing these)
> 
> the only robust solution for this kind of features is a generic 
> attributes handler (like the one for fonts) but even then, additional 
> nodes interactions and side effects need to be controlled by the macro 
> package.
> 
> Hans 
>