[cups.general] pstops and DSC conformance (again)

[Tim Waugh]

On Tue, 2009-11-03 at 08:59 -0800, Michael Sweet wrote:
> Actually, it isn't actually safe to save before you do the  
> setpagedevice commands, since the restore will undo the setpagedevice  
> commands... :(

How about an input file that redefines setpagedevice in the prolog --
can that possibly be allowed in a DSC-comformant document?

It turns out that psnup (from psutils-1.17) acts in that way:

%%BeginProlog
%%BeginProcSet: PStoPS 1 15
userdict begin
....
/setpagedevice {pop}bind 1 index where{dup wcheck{3 1 roll put}
 {pop def}ifelse}{def}ifelse
....
end
%%EndProcSet

This comes from:

yes | cat -n | head -n 250 | enscript -o foo.ps
psnup -2 foo.ps > foo2.ps

originally from this bug report:
  https://bugzilla.redhat.com/show_bug.cgi?id=532740

Tim.
*/

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