Re: [hpoj-devel] fixed xsane crash, working on OJ LX/300 support

[David P. <pa...@rc...>]

Joe Piolunek wrote:
> Copy quality: The colors in the copy are lighter than in the original. In the
> 	tests I did, the printed area appeared higher on the page than in the
> 	original copy (about 13 mm. closer to the top).
Did it help to use xsane's brightness/contrast controls?

> The part of the process that *seems* longest is when nothing appears to be 
> happening. A seeming lack of activity should be avoided, IMHO. The wait would 
> seem a lot easier if the progress bar's behavior were changed so that it 
> either moves slowly, finishing as the print begins, or even better (IMO),  
> the progress bar moves faster, but restarts for each part of the process, 
> accompanied by an informational text message.
Unfortunately, I don't think there's much that can be done about this delay
unless the ghostscript+hpijs step can somehow be made faster.  I don't know
how long it takes xsane to generate a PostScript version of the scanned
image.  I do know that there can be a long delay from the time the
PostScript file gets to the print spooler to the time the page is done
printing, and during that time xsane has no visibility on the status of
that operation in order to display a realistic progress bar.

One possible solution would be to write a command-line application that
uses scanimage to scan the page(s), either calls hpijs directly (bypassing
the time-consuming PostScript conversion steps) or links directly with
the DJ6xx driver code, and sends the resulting output through libptal to
the printer.  It would really only need to support color copying on the
DJ6xx-based models, because other models can handle standalone color
copying and all models can handle standalone black&white copying.
However, I won't be able to attempt this any time soon.

David