问题
I have a pdf file with 3 pages. I want to print first page as simplex and second & third page as duplex(double-sided - second on the front, third on the back). How can I generate the required postscript with ghostscript.
I found the below solution on the internet and it works, but it makes the whole document as duplex.
gswin64c.exe -q -dSAFER -dNOPAUSE -dBATCH -sDEVICE=ps2write -sOutputFile=output.ps -c "<</PSDocOptions (<</Duplex true>> setpagedevice)>> setdistillerparams" -f input.pdf
Above one is a document level option, I found page level option on the Ghostscript documentation page in below link. https://www.ghostscript.com/doc/9.50/VectorDevices.htm#PS
But i could not find any sample code for PSPageOptions parameter. I have tried with below command, but no luck.
gswin64c.exe -q -dSAFER -dNOPAUSE -dBATCH -sDEVICE=ps2write -sOutputFile=out.ps -c "<</PSPageOptions [(/Duplex false)(/Duplex true)(/Duplex true)] /LockDistillerParams true>>setdistillerparams" -f input.pdf
Did I miss anything? Someone, please help me out.
回答1:
From Postscript Language Reference Manual 3rd Ed. at 6.1.1:
Note: setpagedevice is a page-oriented operator used to control the output process-
ing of one or more pages of a page description. Any call to setpagedevice implicitly
invokes erasepage and initgraphics, and thus must precede the descriptions of the
pages to be affected. If the current device is not a page device, the effect of invoking
setpagedevice is device-dependent.
Therefore try to open the PostScript file in a text editor and insert the "<</Duplex false>> setpagedevice" at the beginning of the Page 1 code and the "<</Duplex true>> setpagedevice" at the beginning of the Page 2 code. There is also <</Tumble true>> option that might be desired as explained at 6.2.3:
Duplex boolean A flag determining whether the output is to be printed duplex (on both sides
of the physical medium) or simplex (on one side of the medium only). If this
flag is true, pairs of consecutive page images will be printed on opposite sides
of a single sheet of medium; if false, each page will be printed on a separate
sheet.
On device activation, a duplex device always prints the first page on a new
sheet of medium; on deactivation, it automatically delivers the last sheet of
medium if it has been printed on only one side.
Tumble boolean A flag specifying the relative orientation of page images on opposite sides of a
sheet of medium in duplex output (that is, when Duplex is true). If Tumble is
false, the default user spaces of the two pages are oriented suitably for binding
at the left or right, with vertical (y) coordinates in the two spaces increasing
toward the same edge of the physical medium. If Tumble is true, the default
user spaces are oriented suitably for binding at the top or bottom, with verti-
cal coordinates increasing toward opposite edges of the medium. If Duplex is
false, the Tumble parameter has no effect.
Note that Tumble is defined in terms of default user space—the user space
established by setpagedevice. The orientation of default user space with re-
spect to the medium is determined by the PageSize and Orientation
parameters, possibly altered by the Install procedure. Consistent results are
obtained across all devices that support duplexing, regardless of how the me-
dium moves through the printing mechanism. However, if a page description
alters user space by invoking operators such as rotate, the visual orientation
of the material printed on the page may differ from the orientation of default
user space.
EDIT: Now I see the point. I was able to modify your approach to insert the strings into the postscript except can't check the duplex printing with my simplex printer. The ghostscript does insert the correct strings into the %%BeginPageSetup as expected:
-c "<</PSPageOptions [ ( (page +1) print) (<</Duplex true>> setpagedevice) ( (page 2+) print) ] /LockDistillerParams true>> setdistillerparams"
The first and third pages emit the page strings and I found the setpagedevice in the correct location for page +2 so I hope everything is working. Your first attempt was very close and I learned something too.
page +1>>showpage, press <return> to continue<<
>>showpage, press <return> to continue<<
page 2+>>showpage, press <return> to continue<<
page +1>>showpage, press <return> to continue<<
>>showpage, press <return> to continue<<
page 2+>>showpage, press <return> to continue<<
page +1>>showpage, press <return> to continue<<
来源：https://stackoverflow.com/questions/64126376/add-duplex-option-for-certain-pages-in-postscript-file-using-ghostscript