Resolution defination in DRV file

[keens312]

> keens312 wrote:
> >> hi Michael,
> >>
> >> I have an issue on Mac OSX.
> >>
> >> The monochrone laserjet printer is required to support four resolutions:
> >> 1. 400 x 600 x 1
> >> 2. 600 x 600 x 1
> >> 3. 600 x 600 x 2
> >> 4. 1200 x 1200 x 1
> >>
> >> So, to implement this, I need to add lines in Drv file to specify this, and filter driver will the user selected resolution for printing.
> >>
> >> The issue is that only 600 x 600 x 1 can work properly.
> >> For all the other resolutions, the top-left point shift to left about width/2 pixils, which means printed out of paper (on the left).
> >>
> >> I have totally now clue about this issue. Something wrong in Drv file or filter program?
> >>
> >> Could you please help to show me the code snippet for the four resolutions in the DRV file?
> >>
> >> Thanks
> >> Keene
> >>
> >
> > Hi Michael, is this correct?
> >
> > *Choice "Res400/Res 400" "<</HWResolution[400 600]/cupsBitsPerColor 8/cupsColorSpace 0/cupsCompression 2>>setpagedevice"
> > Choice "Res600/Res 600" "<</HWResolution[600 600]/cupsBitsPerColor 8/cupsColorSpace 0/cupsCompression 3>>setpagedevice"
> > Choice "Res1200/Res 1200" "<</HWResolution[1200 1200]/cupsBitsPerColor 8/cupsColorSpace 0/cupsCompression 3>>setpagedevice"
>
> The PostScript code is correct, but the naming is not.  If you read
> the PPD spec (and you really really need to do that) you'll see that
> resolution names need to be of the form:
>
>      NNNdpi
>      NNNxNNNdpi
>
> where the first form specifies an equal horizontal and vertical
> resolution in dots per inch and the second form specifies them
> separately (horizontal value first, then vertical).
>
> You'll also need to declare the option itself, so the following
> would be a correct and complete example:
>
>      Option "Resolution/Output Resolution" PickOne DocumentSetup 10.0
>        *Choice "400dpi/Res 400" "<</HWResolution[400
> 600]/cupsBitsPerColor 8/cupsColorSpace 0/cupsCompression 2>>setpagedevice"
>        Choice "600dpi/Res 600" "<</HWResolution[600
> 600]/cupsBitsPerColor 8/cupsColorSpace 0/cupsCompression 3>>setpagedevice"
>        Choice "1200dpi/Res 1200" "<</HWResolution[1200
> 1200]/cupsBitsPerColor 8/cupsColorSpace 0/cupsCompression 3>>setpagedevice"
>
> You may also want to change the UI text for the resolution options
> to something more appropriate to your users - for technical users
> "Output Resolution" and "600 DPI" are appropriate, but for non-
> technical users you probably want to just call it "Quality" with
> "Draft", "Normal", and "High" for 400, 600, and 1200 DPI,
> respectively.
>
> --
> ______________________________________________________________________
> Michael R Sweet                        Senior Printing System Engineer
>

Hi Michale,

The sample above only contains three cases, how about 600x600x2? What's the differnece compared with 600x600x1?

Thanks
Keene