Re: Note re PS Portability/Speed (was Re: PDF Creation Problem)

[Dov Isaacs <isaacs@xxxxxxxxx>]

Actually, the portability setting was there to turn OFF some
optimizations that were made in generating PostScript via the
driver. The driver assumed that applications would not "passthrough"
PostScript that would modify certain current graphic states.
Some applications didn't quite follow the (un)written rules and
thus, the "portability" option was setup to make no assumptions
about how "rude" an application would be in intermixing GDI calls
and passthrough PostScript. Ironically, if I recall correctly, one
of the most problematic applications for this was indeed FrameMaker.
After Adobe acquired Frame Development, the problems were fixed.
My recollection is that once FrameMaker reached release 5.1, the
problem was gone!

        - Dov


At 2/10/2003 12:15 PM, Peter Gold wrote:
>I believe that in the distinction between PS Optimize for Speed and 
>PS Optimize for Portability refers to the commands embedded in the 
>..ps file.
>
>In earlier releases of Acrobat, I understood that if one used a 
>physical PS printer's driver, choosing Speed would send code macros 
>(abbreviated instructions) to the printer, which would be expanded by 
>firmware on the printer; because less code was sent, the transfer of 
>information to the printer was faster, and because the printer 
>firmware understood the abbreviated code, it processed the print job 
>faster. A problem occurred when Distiller could not interpret or skip 
>these macros in .ps files, and an error "offending command" or 
>similar appeared.
>
>Further, I understood that when using the Acrobat Distiller printer 
>driver to create .ps files, there is no difference between 
>Portability and Speed, because there is no physical printer, hence no 
>special commands for it to interpret.
>
>Was I misinformed? Did things change in newer releases?
>
>Regards,
>
>Peter Gold


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