[PATCHv2] dix: add 3x3 transformation matrix xinput property for multi-head handling

[Simon Thum]

Am 07.05.2010 21:07, schrieb Keith Packard:
> On Fri, 07 May 2010 20:41:53 +0200, Simon Thum <simon.thum at gmx.de> wrote:
> 
>> While that's true, a sensible subset of transforms could be applied
>> directly onto relative axes. One would need to beef up the sub-pixel
>> motion buffers a bit, but it's doable.
> 
> Sure, what wording would you suggest to define how this should work?
> Just pull out the 2x2 upper left subset of the projective transform?
Pretty much that, yes. Just additions don't work out, "linear transform"
would probably be correct.