[Mesa-dev] [PATCH 1/2] vl: add a lanczos interpolation filter v3

[Andy Furniss]

Nayan Deshmukh wrote:
> Hi Christian
>
> On Wed, Aug 3, 2016 at 6:16 PM, Christian König
> <christian.koenig at amd.com> wrote:
>
>> Sorry for the delay I've been on vacation for a week.
>>
>> Good to hear back from you !!
>
>
>> Where you able to fix the problem Andy reported? I was able to
>> rather easily reproduce that.
>>
>> I have tested it on my system and my friend's system and it seems
>> to be
> working fine. It would be great if Andy can confirm the same.

I am still seeing some artifacts though not the same as last patches and
un-scaled on first look appears OK but it isn't.

Does the scaling happen before CSC? I ask as on  unscaled which doesn't
show any line/block type artifacts, there are sometimes what look like
gamma shifts. There is also a slight shift in image position vs default
or bicubic.

Just to really confuse me I also managed to get mpv to produce a
different result from mplayer on one particular test, they usually look
the same. I did already correct for their differing behaviors WRT using
601 and 709 CSC.

Pendulum again just fullscreen this time as you can't really see
anything wrong windowed.

https://drive.google.com/file/d/0BxP5-S1t9VEEcW02VkVYWDdZd1E/view?usp=sharing