[Nouveau] XRandR 180

[Stephane Marchesin]

On 10/8/07, Justin Dugger <jldugger at gmail.com> wrote:
>
> Hi,
>
> Does the current tree implement Rotate 180? I can see 0, 90 and 270,
> but not 180.  This feature might sound silly at first glance, but it
> happens to be highly useful for my convertible tablet laptop.  I've
> browsed the current nv code and nouveau implementations, and it's
> pretty clear that the older xrandr implementation did not do this.  Is
> there some secret in xrandr1.2 that I'm not seeing, or is the function
> also lacking in the current tree?
>
> This change seems like a fairly simple 20-ish line of code patch to
> support an additional rotation mode, but there's one thing I'm not
> clear on: does pNV map to some register in hardware, or is it simply a
> global state for the driver itself?
>

Hello

Our plan is a bit longer term than that. We want to implement hw accelerated
rotate support through randr + EXA. On the minus side, it's not a 10-line
job and requires us finishing up EXA composite() hookrs properly, but on the
plus side, it'll be hw accelerated.

Stephane
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