XInput: Tablet to screen coordinate translation

Peter Hutterer mailinglists at
Tue Feb 27 04:16:51 PST 2007

On 26/02/2007, at 08:27 , Magnus Vigerlöf wrote:

> Hi,
> [...]
> So I wonder if anybody could help me and point out where the  
> coordinate
> conversion should be made?

GetPointerEvents converts coordinates into xEvents. At this point you  
need to know whether the coordinates you pass in are absolute or  
relative ones, and they will be clipped accordingly. GPE is called  
when your driver calls xf86PostXXXEvent, so the answer to your  
question is that conversion from a device-specific coordinate system  
into screen coordinates should to be done in the driver.

Didn't quite understand your problem with GIMP though.


Multi-Pointer X Server

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