Re: [Gimp-print-devel] Re: Portable printers

[Till K. <til...@gm...>]

Robert L Krawitz wrote:
> 
> So in summary, the driver is in fact not broken, but the density is
> screwed up?
>

That's the case. In general there are discrepancies between the native
CUPS drivers the GhostScript "stp" driver. The Canon portables work
perfectly now with GhostScript, but the native CUPS driver needs more or
less the double density. For the HP DeskJet 840C with GIMP-Print 4.0.4 I
always needed a Gamma of 1.5 for the CUPS driver and 2.5 for the
GhostScript driver. Note that in the case of Canon the density must be
corrected, because the full black is also too light with the CUPS driver
and for the HP the Gamma must br corrected because the pure black is OK
for both drivers there. Also for the Epson Stylus 440 which prints
absolutely OK with the native CUPS driver, I need a Gamma of around 1.8
for GhostScript. I have only tried with the GhostScript "stp" version of
GIMP-Print 4.0.4. Were there any changes in 4.1.x to address that?

   Till