On 06/23/2010 07:34 PM, Tim Waugh wrote: > On Wed, 2010-06-23 at 19:23 +0800, Ed Greshko wrote: > >> I think it should be pointed out when this is useful. If one has a >> postscript file you'd use this to send it to the printer rather than >> printing the postscript file itself...for example. Yes? >> > Not really. More the opposite actually. If you have a printer that is > *not* PostScript capable, and you want to see the actual PostScript > commands, you could send the PostScript file to a raw queue for the > device to achieve that. Otherwise CUPS will filter it into the actual > page described *by* the PostScript. > > It's useful if, say, you have an application that produces PCL3 output > for your specific printer, and you don't want CUPS to try to work out > what to do with it in case it gets it wrong. > > It is sometimes useful to diagnose printing problems as well. If you > have a queue with a PostScript driver (i.e. a filter), and things are > printing out correctly, you can send some PostScript as a raw job (or to > a raw queue) to bypass the filtering, to see if the filter is the > problem. (For example, foomatic's PostScript filter adds page counting > stuff to the input.) > > It's also worth noting that you can just use 'lp -oraw ...' to achieve > the same thing, without having to set up a special queue. > > Good to know.... I always forget how that works. :-) Thanks... -- A rolling stone gathers momentum. 葛斯克 愛德華 / 台北市八德路四段
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