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From "Christian Pestel" <christian.pes...@orange.fr>
Subject PostScript trays for printer Xerox 7835
Date Fri, 06 Feb 2015 16:48:23 GMT
Hi,

I would like to print on a Xerox 7835 printer

With LasetJet Printer trays, this work fine but not with Xerox 7835.

With LaserJet,  trays PostScript instruction are 
for Tray 1 : /MediaPosition 1
for Tray 2 : /MediaPosition 2

With Xerox :
for Tray 1 : (tray1) xerox$MediaInputTray 
for Tray 2 : (tray2) xerox$MediaInputTray 
Here is an extract of my IF file (Intermediate Format) for LaserJet :

Page 1 : 
<ps-setpagedevice xmlns="apache:fop:extensions:postscript" name="Paper_1"> <<
/MediaPosition 1 >> </ps-setpagedevice>

Page 2 : 
<ps-setpagedevice xmlns="apache:fop:extensions:postscript" name="Paper_2"> <<
/MediaPosition 2 >> </ps-setpagedevice>

PS file for LaserJet :
Page 1 : 
%FOPBeginSetPageDevice
<<
/PageSize [595 842]
/MediaPosition 1
/ImagingBBox null
>> setpagedevice
%FOPEndSetPageDevice

Page 2 :
%FOPBeginSetPageDevice
<<
/PageSize [595 842]
/MediaPosition 2
/ImagingBBox null
>> setpagedevice
%FOPEndSetPageDevice

Here is an extract of my IF file (Intermediate Format) for Xerox 7835"
Page 1 : 
<ps-setpagedevice xmlns="apache:fop:extensions:postscript" name="Paper_1"> <<
(tray1) xerox$MediaInputTray >> </ps-setpagedevice>

Page 2 : 
<ps-setpagedevice xmlns="apache:fop:extensions:postscript" name="Paper_2"> <<
(tray2) xerox$MediaInputTray >> </ps-setpagedevice>

PS file for Xerox :

Page 1 : 
%FOPBeginSetPageDevice
<<
/PageSize [595 842]
(tray1) xerox$MediaInputTray    <=====  correct/ImagingBBox null
>> setpagedevice
%FOPEndSetPageDevice

Page 2 :
%FOPBeginSetPageDevice
<<
/PageSize [595 842]
(tray1) xerox$MediaInputTray <=====  incorrect

(tray2) xerox$MediaInputTray  <===== only this line is correct 

/ImagingBBox null
>> setpagedevice
%FOPEndSetPageDevice

I have analysed the fop source code.

In fact, Fop use a key/Value HashTable and all new  key/value are cumulative.  
Example with LaserJet 

Page 1 : key=/MediaPosition and value=1   => Fop write in PostScript : “/MediaPosition
1”
Page 2 : key=/MediaPosition and value=2   => Fop write in PostScript : “/MediaPosition
2”

Exemple with Xerox :

Page 1 : key=(tray1) and value=xerox$MediaInputTray    => Fop write in PostScript : “(tray1)
xerox$MediaInputTray” 
Page 2 : key=(tray2) and value=xerox$MediaInputTray    => Fop write in PostScript all keys/values
 : “(tray1) xerox$MediaInputTray” + “(tray2) xerox$MediaInputTray”

 

Where is the best way to resolve this problem ?

Possibly adding a new key ClearPreviousTrayInfosBeforeSettingNewPage=true/false in fop config
PostScript section ?

Thank you for your advice.

 

 

Christian Pestel

christian.pestel@orange.fr

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