Re: [hpoj-devel] Double-sided printing

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

Bill Wohler wrote:
>   Where is this cdj970 driver you speak of? I had my head in gs 5.10,
>   5.50 and 6.50 today (long day). Didn't see it anywhere.
See "http://www.linuxprinting.org/show_driver.cgi?driver=cdj970" and
"http://www.harsch.net/Ghostscript/ghostscript.html".

>     [wohler@gbr:803]$ make -f unix-gcc.mak prefix=/usr/local
>     gcc `cat ./obj/cc.tr`  -O2 -Wall -Wcast-align -Wstrict-prototypes
>         -Wwrite-strings -fno-common  -I. -I./obj -I. -I./obj  -o
>         ./obj/zdevcal.o -c ./zdevcal.c 
>     ./zdevcal.c: In function `calendar_get_params':
>     ./zdevcal.c:53: storage size of `ltime' isn't known
>     ./zdevcal.c:55: dereferencing pointer to incomplete type
>     ./zdevcal.c:55: initializer element is not constant
>     ./zdevcal.c:55: (near initialization for `items[0].offset')
>   I probably won't pursue that path, but am curious why struct tm
>   didn't get defined.
I'm not sure.  For what it's worth, I invoked "make" without any parameters
in the gs5.50 directory, but that shouldn't make any difference.

I forwarded your message to "lin...@hp...", and you might also want
to keep an eye on and/or post to one of their forums, in case somebody there
can give you any advice.

>   gs --help shows the DJ9xx driver and it appears to work although I
>   haven't noticed any difference in print quality for text. Ah, just
>   printed a photo--there's the difference! (Possible to get my old 300
>   dpi laser printer quality on the text on this 600 dpi OJ G85
>   printer?)
I don't know.  The only text I've printed so far is on the standard RedHat
PostScript test page.  At 300x300 I didn't see any improvement over cdj550.
At 600x600 in photo mode text looks better, although I think you need photo
paper in order to get optimal photos.  The biggest improvement with these
drivers seems to be in color matching and dithering, as you observed.

>   Another strange thing is that lprngtool doesn't show the new
>   drivers... Any thoughts on why not?
With RedHat printtool (which may be similar to lprngtool), it keeps a
database of known drivers and settings, which has to be updated as part of
the hpinkjet driver installation in order to recognize the new drivers.
Again, this might be something worth asking in the hpinkjet Help forum.

>   The example on the hpinkjet site explains that the duplex printing
>   isn't working yet :-(.
Not yet, but from what I've heard they're planning on it eventually.

David