[gs-bugs] [Bug 692261] New: IJS printer driver interface: "Unsupported color conversion request" in certain print quality modes

[bugzilla-daemon at ghostscript.com]

http://bugs.ghostscript.com/show_bug.cgi?id=692261

           Summary: IJS printer driver interface: "Unsupported color
                    conversion request" in certain print quality modes
           Product: Ghostscript
           Version: 9.02
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P4
         Component: Printer Driver
        AssignedTo: support at artifex.com
        ReportedBy: till.kamppeter at gmail.com
         QAContact: gs-bugs at ghostscript.com
   Estimated Hours: 0.0


On Ubuntu Natty (Ghostscript 9.01) and Oneiric (Ghostscript 9.02) I have a
problem with the IJS printer driver interface when used with the PXLJR driver
(http://sourceforge.net/projects/hp-pxl-jetready/, in Ubuntu installed by
default). The draft and normal printout modes of the driver make Ghostscript
abort with a "Unsupported color conversion request" error, the high quality
printout mode works correctly.

The Ghostscript command line for the draft mode is the following:

gs -dFirstPage=1 -q -dBATCH -dPARANOIDSAFER -dQUIET -dNOPAUSE -sDEVICE=ijs
-sIjsServer=ijs_pxljr -sDeviceManufacturer="HEWLETT-PACKARD" -sDeviceModel="hp
color LaserJet 3550" -dDEVICEWIDTHPOINTS=595 -dDEVICEHEIGHTPOINTS=842
-dDuplex=false -r600
-sIjsParams=Quality:Quality=1,Quality:ColorMode=2,Quality:MediaType=0,Quality:PenSet=2,PS:MediaPosition=7
-dIjsUseOutputFD -sOutputFile=- file.pdf > out.prn

file.pdf is an arbitrary PDF file.

grepping /usr/lib/ for the error message "Unsupported color conversion request"
shows that it is only in libjpeg, but the problem occurs also with PDF files
which contain only text.

In the case of failure, out.prn contains the following Ghostscript error
message:

Error: /ioerror in --showpage--
Operand stack:
   1   true
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--  
--nostringval--   2   %stopped_push   --nostringval--   --nostringval--  
--nostringval--   false   1   %stopped_push   1910   1   3   %oparray_pop  
1909   1   3   %oparray_pop   1893   1   3   %oparray_pop   --nostringval--  
--nostringval--   2   1   3   --nostringval--   %for_pos_int_continue  
--nostringval--   --nostringval--   1793   0   9   %oparray_pop  
--nostringval--   --nostringval--
Dictionary stack:
   --dict:1167/1684(ro)(G)--   --dict:1/20(G)--   --dict:82/200(L)--  
--dict:82/200(L)--   --dict:108/127(ro)(G)--   --dict:295/300(ro)(G)--  
--dict:23/30(L)--   --dict:6/8(L)--   --dict:21/40(L)--
Current allocation mode is local
Last OS error: 32

For normal mode we have the same command line but with "Quality:Quality=0" and
for the (working) high quality mode with "Quality:Quality=2".

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