When I was trying to include spot colorsupport I had to read the source
code...Apostolos
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Στις Σάβ, 6 Ιουν, 2020 στις 21:28, ο χρήστηςPhilip
Taylor<p.tay...@hellenic-institute.uk> έγραψε:
David Carlisle wrote:
>
> Phil wrote 'However, it would seem that while the "xdv2pdf" driver was happy
> with \special {color push}, the "xdvipdfmx" driver is not. '
>
> I doubt that ever worked, the semantics of "push" on any stack mean you have
> to say what you are putting on the stack, unlike pop where you just take off
> the top element (or underflow)
I had assumed (perhaps wrongly) that "\special {color push}" would push the
/current/ colour onto the stack, thus allowing one to subsequently execute
\special {color cmyk . . . .} non-destructively because the previous colour had
been saved on the stack and could therefore be restored ("popped") therefrom ...
> I don't suppose you count the most reliable documentation?
>
> https://github.com/TeX-Live/texlive-source/blob/trunk/texk/dvipdfm-x/spc_color.c#L167
Er, no. I neither read nor write C. I was looking for something written in
English, or at least in a natural language.
** Phil.
