Inconsistency with scaler extension?

[Daniel Stone]

Hi,

On 14 December 2015 at 11:40, Pekka Paalanen <ppaalanen at gmail.com> wrote:
> On Tue, 08 Dec 2015 14:48:01 +0100
> Matthias Treydte <mt at waldheinz.de> wrote:
>> Either way, using the scaler API causes either too much drawing when
>> used without setting the damage region (variant (b) above then should
>> change nothing on screen at all, right?) -- or it causes insufficient
>> drawing for variants (a) and (c) above.
>
> We easily err on too much repainting, as it is safe. The damage region
> handling is one of the most complicated pieces of Weston, and
> optimizing it is hard. It also has some known inefficiencies, but yours
> is a new observation, IIRC.

Is it actually new, or is it just yet another occurrence of
https://phabricator.freedesktop.org/T17 ... ?

Cheers,
Daniel