Multiple Copies of Same Page Content from Various Trays

Question

I use 'gs' to create postscript, and 'setpagedevice' to specify trays.
I print a single page of content (say the file "f.pdf") on each of six different colors of paper, which are pulled from different trays.   At the moment, I do this by repeating the filename "f.pdf" six times as an arg to 'gs'.  This creates a single postscript file, into which I insert my six 'setpagedevice' commands.
My 65ppm printer has to re-render the same 'f.dpf' postscript six times, which causes it to only produce about 20ppm.
Is there a way to pass a NumCopies specification so that each of my 'setpagedevice' commands switches trays to print the exact same rasterized bitmap? In other words, to write a postscript file that rasterizes 'f.pdf' only once, and still makes use of that cached image for each 'setpagedevice'?
I'm happy to read manuals, but I don't know what technique or feature name(s) I should look for...
thank you,
- Randy

Answer 1

Randy,
If your original one page ps or eps file was e.g.
72 720 moveto
/Helvetica 72 selectfont
(Hello World) show
showpage
Then you can try something like this:
/MyPage
    72 720 moveto
    /Helvetica 72 selectfont
    (Hello World) show
    showpage
} def
and then in paint procedure in the form:
/PaintProc
    MyPage
Use setpagedevice to select your tray instead of a page size like in the prior post's example before calling the form. Since the form is the same on each
page hopefully it will be stored in the form cache and speed things up but you may need to check the cache size.
Ed