Re: [Linuxwacom-discuss] Subpixel accuracy

[Alexia D. <ale...@gm...>]

On Wednesday 23 July 2008 03:03:34 Radek wrote:

> I'll try to describe the problem the best I can:
> Lets say I run GIMP with an image viewed at 25% zoom, that is, one
> pixel on display correnponds to 4x4 square on the image. Using the
> tablet I draw a curve with a pencil tool (1x1 square brush without
> antialiasing). I zoom image to 100% and see that the curve is not
> smooth, but consists of short, straight sections either vertical,
> horizontal or diagonal, like if it was snapped to 4x4 pixel grid.
Please include an image. What you describe right now sounds pretty normal for 
a 1x1 not anti-aliased brush. 

> I know that this is because GIMP gets the stylus coordinates with
> accuracy limited to the resolution of my display.
Nope, no it does not.  Gimp 2.5 does limit accuracy in some cases tho, for 
performance and cutting noise. It is a bit of code that could use some tuning, 
and perhaps you are willing to test?

> If there was a way to
> make it receive (and properly interpret) stylus coordinates with an
> increased precision (so that it would be limited by tablet's resolution
> rather than display's), it would work as it should.
Leaving it entrely to tablet is pointless and generates noise, because you 
simply aren't able to control you stylus with that precision, but that limit 
tho related to display resolution should go unnoticed for the user.
 
> I've been googling to find a solution for this, but I've only found out
> that it's a Xorg limitation and nothing can be done unless Xorg
> supports it.
Xorg supports it. Gimp supports it. Please explain what you expect.

> Or maybe I'm just missing something?
Yep, missing something.