Inconsistency with scaler extension?

[Daniel Stone]

On 14 December 2015 at 12:49, Daniel Stone <daniel at fooishbar.org> wrote:
> 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 ... ?

By which I obviously mean https://phabricator.freedesktop.org/T18