From: Nikolai Grigoriev (firstname.lastname@example.org)
Date: Wed Oct 22 2003 - 14:13:05 PDT
> We are very interested in any postscript device control such
> as tray switching, output jogging and simplex/duplex printer
> control. Will any or all of these controls be a part of 3.6.3.?
They are already present since XEP 3.6.
> Where will these controls be documented?
They are documented in doc/spec.pdf, Section 4.10
"Page Device Control"; you can also read it online at:
Essentially, we have a very general processing instruction
that inserts arbitrary PostScript code as a value for an
entry in page device dictionary. This value my be set
for the whole document (in which case the PI should
be located at top level, before <fo:root>), or for an
individual page (in this case, the PI is placed inside
<fo:simple-page-master> for that page). Some examples:
<?xep-postscript-page-device /Duplex true?>
sets duplex mode for the document (and reverts back to the
original mode in the document trailer);
<?xep-postscript-page-device /MediaColor (yellow)?>
<?xep-postscript-page-device /MediaType (coversheet)?>
<fo:region-body margin="1.5in 1in"/>
sets /MediaColor and /MediaType entries for padedevice
for pages _produced with this page-master_ (and reverts
them back to original values in the page trailer);
<< 0 << /PageSize [ 612 1008] >>
1 << /PageSize [ 612 792]
specifies a whole /InputAttributes dictionary to tweak media selection
policies for the document.
NOTE 1: the mechanism is extermely powerful but requires care to use.
Incorrect PostScript code in the PI may ruin the whole output file.
NOTE 2: Allowed entries for setpagedevice/currentpagedevice are
printer-specific. Please consult your printer manual for a list of
page device options and their values. Please also note that the
resulting code may not be portable across printers.
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