[Desktop_printing] Re: [Printing-architecture] Printing Summit
memo (for tomorrow sc meeting)
giles at ghostscript.com
Wed Feb 8 14:08:27 PST 2006
On Wed, Feb 08, 2006 at 02:43:11PM +0900, Osamu MIHARA wrote:
> One thing I'm concerning is that transition of printing spool format
> from PostScript to PDF.
Yes, this is something of a disadvantage with moving to PDF (just as
it's an advantage for document viewers). Streamability for
manipulation and printing pipelines is also supposed to be an (optional)
feature of Microsoft XPS.
> Also streamed PDF is
> provided from Adobe, but I heard that streaming technology about PDF
> format is patented by Adobe.
Do you have more details on this? Note that Artifex (commercial
ghostscript licensors) have a US patent application on this.
I can't find a direct link, but you can search by application number at
uspto.gov. Deutsch, Levien and Johnston, " Method and apparatus for
reordering an arbitrary order signal sequence into a streamable signal
sequence" USPTO application number 20050203919 .
Anyway, it's possible something like the spec re-arrangement documented
above would get used for printers, but more likely things will remain
as they are now, where a direct PDF printer will have a disk or at least
enough ram to buffer the whole document, and everyone else uses a dumb
printer with translation in the driver on a host that can do the same.
I was under the impression that most print queues spooled the entire
print job anyway, even with Postscript. Is this not the case?
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