Why do you think the native resolution of the 9000 is 300 x 300?
Qimage is reporting the native resolution that your driver is reporting to Qimage.

Fred

Wil,
I beg your pardon if it sounded like an argument when I asked a simple question.
You stated as if it was a fact not to be questioned, why is Q reporting 600 when the ppi is 300.
My question was why do you think it should be 300?
I was expecting you to say, I read it somewhere, in my manual, or on line.
I think that's a reasonable question, and I explained that Qimage doesn't make that decision; your printer driver does.
So, Frankly, if you think I am being argumentative, then you can have someone else respond to your question.

Oh yes, there's a horizontal DPI and a vertical DPI and they are not the same, to answer the other part of your question.

Good day!
Fred

The problem here is that all of your assumptions are wrong, so my answers basically follow from there.  The native resolution of the Canon Pro 9000 Mk II driver is 600 x 600 PPI.  And no, PPI is not a single number.  All printer drivers report horizontal PPI and vertical PPI as different numbers.  Typically they are the same, but they don't have to be.

Mike

1. Already said that above.  The native resolution of that printer is 600 x 600 PPI.  You can call it 600 PPI for short if you like: because both horizontal and vertical are the same.

2. Yes, if you have the "Res" in the job properties set to "Max".  Drop down the list and you can see all the resolutions that you can tell Qimage to use.

3. It sends the proper rectangular data.  I'm not aware of any recent printers that use a different horizontal/vertical resolution but some HP's used to make use of that feature and you'd see (1200 x 600) in Qimage for example.  So if you want a 1 inch x 1 inch print, the software should send 1200 x 600 pixels.  If you sent 1200x1200 you'd get 1 inch x 2 inches.

Mike