Landscape PS file to Landscape BMP using bmpxxx driver

> Ken,
>
> Thank you for your answer. It's been a few days since I was able to get back to this issue.
>
> We are trying to convert postscript files to bitmap files using Ghostscript 9.05 and the gs_api functions. Basically we are using the -bmpmono (or other bmpxxx device) and reading the bitmap stream from Ghostscript to later send on to another step in our process.
>
> The postscript files we are converting are being created by printing to a postscript printer and saving to ps file using redmon. When I open this file in GhostView it is displayed as landscape. When I use Ghostview's File-Convert set to bmpmono or other bmpXXX function (or my gs_api_init args command line) the resulting  image is portrait and not landscape. If I create a PDF file from this postscript file the file is landscape when I open it is Adobe Reader.
>
> When I tried to force the page to be landscape by passing -dFIXEDMEDIA, -dDEVIVCEWIDTHPOINTS=792, -dDEVICEHEIGHTPOINTS=612  my resulting bitmap was still in portrait orientation. I checked this by looking at the bitmap header width\height as I was reading in the data stream.  I don't believe this technique would work anyway as we need to be able to handle different page sizes.
>
> What we were looking at doing was seeing if there was some way to have gs send us the bitmap stream already rotated if needed. The key here is if needed as not all of the postscript files have this problem, and we also have to deal with postscript files potentially having mixed media and mixed orientation in the same file.
>
> We are now looking using  -dPROCESSDSC and possibly, as you've said, feeding the ps  file that does the rotation as part of the command line args. The big question is would this apply to the postscript file as a whole or on a page-by-page basis?
>
> Do you have any examples of the postscript I would need to write to do the orientation? Or a link in the right direction?
>
> Here's the sample postscript file that was created for testing. The original file was a landscape document in Word.
> https://docs.google.com/open?id=0B7Nhft9xsw0cYVdXdEpkM0ZTM0dyTUVULV82Zmxodw
>
> Here is the current gs_init_args we are using:
> gsargv[i++] = "PN" ;            
>
> sprintf(pBuf, "-I%s;%s", szLibDir, szFontDir );
> gsargv[i++] = pBuf ;
>
> sprintf(pBuf, "-sFONTPATH=\"%s\"", szFontDir );
> gsargv[i++] = pBuf ;
>
> // batch mode, don't pause between files            
> gsargv[i++] = "-dSAFER" ;        
> gsargv[i++] = "-dNOPAUSE" ;            
> gsargv[i++] = "-dBATCH" ;
>
> gsargv[i++] = "-sDEVICE=bmpmono" ;            
> gsargv[i++] = "-dTextAlphaBits=1" ;            
> gsargv[i++] = "-dGraphicsAlphaBits=4" ;
>
> sprintf(pBuf, "-r%dx%d", dwResolutionX, dwResolutionY ) ;
> gsargv[i++] = "pBuf ;
>
> // Set reader pipe handle
> cbNeeded = (strlen("-sOutputFile=%%handle%%") + 12 ) * sizeof (CHAR )  ;        
> pBuf = (char *)alloca( cbNeeded ) ;            
> memset( pBuf, 0, cbNeeded ) ;          
> sprintf(pBuf, "-sOutputFile=%%handle%%%p", m_hGSPipeWriter );
> gsargv[i++] = pBuf ;
>        
> // get ghostscript to send us the bitmap flipped for bottom-up read
> gsargv[i++] = "-c";
> gsargv[i++] = "<< /Install { 0 currentpagedevice /PageSize get 1 get translate 1 -1 scale } >> setpagedevice";
> gsargv[i++] = "-f" ;
>
> Best Regards,
> Sheri
>
> -----Original Message-----
> From: Ken Sharp [mailto:ken.sharp@...]
> Sent: March-10-12 4:09 AM
> To: Sheri Steeves
> Cc: gs-devel@...
> Subject: Re: [gs-devel] Landscape PS file to Landscape BMP using bmpxxx driver
>
> At 22:53 09/03/2012 +0000, Sheri Steeves wrote:
>
>
> >I had already tried the dFIXEDMEDIA and -dDEVICEWIDTHPOINTS,
> >-dDEVICEHEIGHTPOINTS but this had no effect.
>
> What do you mean by 'had no effect' ? If you altered the page setup then it should most certainly have had *some* effect, if it didn't then something is wrong.....
>
>
> >We have been looking at using the dPROCESSDSC command. Where would I
> >have to add the Postscript procedures to deal with the %%Orientation comment?
>
> I have to say that its very hard to be constructive without a (simple!) example to look at, its not at all clear to me what the construction of the job is and what effect you are trying to achieve. Very possibly there is a simple way to do what you want, but since I'm not clear what that is, I can't think what it would be.
>
> What is it that you are using Ghostscript for ?
>
> Can you please put a simple example file somewhere to look at ?
>
>
> To answer your question; you need to supply a handler for DSC comments, and a ProcessDSCComment user parameter.
>
> This needs to be done something like:
>
> /HandleDSC {
> ...
> %% Insert PostScript code here
> %% to detect the particular comment
> %% and deal with it appropriately
> ...
> } bind def
>
> <<
>    /ProcessDSCComment /HandleDSC
>  >> setuserparams
>
> The best way to do this is probably in a PostScript file, which you then feed into Ghostscript on the command line, before the file you actually want to render.
>
> Please note that in current versions of Ghostscript the file 'gs_dscp.ps'
> is not in /ghostpdl/gs/lib but in /ghostpdl/gs/Resource/Init, which suggests to me you are using an older or forked version of Ghostscript.
>
> The gs_dscp.ps file is part of the internal DSC handling which ends up using the procedures you supply as above/ You do not (or should not) need to add it yourselves, it is part of basic Ghostscript.
>
> Please note that I haven't actually tested any of this myself, all the information here is taken from the Ghostscritp docuemntation.
>
>
>
>              Ken
>
> _______________________________________________
> gs-devel mailing list
> gs-devel@...
> http://ghostscript.com/cgi-bin/mailman/listinfo/gs-devel
>

>What we were looking at doing was seeing if there was some way to have gs
>send us the bitmap stream already rotated if needed. The key here is if
>needed as not all of the postscript files have this problem, and we also
>have to deal with postscript files potentially having mixed media and
>mixed orientation in the same file.
>
>We are now looking using  -dPROCESSDSC and possibly, as you've said,
>feeding the ps  file that does the rotation as part of the command line
>args. The big question is would this apply to the postscript file as a
>whole or on a page-by-page basis?

>We did try using -dPROCESSDSC  and was unsuccessful at getting this to
>work at this point.
>
>gsargv[i++] = "-c";
>CStringA postscript = "<< /Install { 0 currentpagedevice /PageSize get 1
>get translate 1 -1 scale } >> setpagedevice " ;
>postscript += "/HandleDSC { (%%ViewingOrientation: 0 1 -1 0) anchorsearch
>{ pop pop <</Orientation 3 index>> setpagedevice  }
>{(%%ViewingOrientation: 1 0 0 1) anchorsearch {pop pop <</Orientation 0
>index>> setpagedevice} {pop} ifelse } ifelse pop } bind def ";
>postscript += "<< /ProcessDSCComment /HandleDSC >> setuserparams " ;
>gsargv[i++] = (LPSTR)(LPCSTR)postscript;
>gsargv[i++] = "-f" ;