[Mesa-dev] [PATCH 0/2] Implement lanczos interpolation filter

[Nayan Deshmukh]

Hi Andy,



On Mon, Sep 19, 2016 at 3:27 PM, Andy Furniss <adf.lists at gmail.com> wrote:

> Nayan Deshmukh wrote:
>
>> Hi Andy,
>>
>> Thanks for testing the patches!!
>>
>> On Mon, Sep 19, 2016 at 5:24 AM, Andy Furniss <adf.lists at gmail.com>
>> wrote:
>>
>> Andy Furniss wrote:
>>>
>>> Nayan Deshmukh wrote:
>>>>
>>>> This series implements lanczos interpolation filter.
>>>>>
>>>>> Andy, I have made some changes to the code. Can you test the
>>>>> patches. I hope the artifacts are reduced this time.
>>>>>
>>>>>
>>>> The artifacts are still there.
>>>>
>>>>
>>> :(
>>>
>>
>> The higher levels involve a hell lot of calucations per pixel so the
>> decreased fps is expected. I was thinking of having only 2 levels for
>> lanczos filter ie. 2 and 4.
>>
>> Christian, will it be fine if we only have 2 levels (with kernel size
>> 2 and 4) of lanczos filter corresponding to HIGH_QUALITY_SCALING_L2
>> and L3?
>>
>
> 2 and 4 still have the offset issue, which does sometimes cause the
> white line.
>

Hi Andy

I am able to reproduce the offset issue, I will try to work on the patch
tonight.

Regards,
Nayan.

>
> I've found another issue with 2 and 4 = unscaled with a raster locked
> res test the 1 pix detail will be lost. The detail does re-appear if you
> scale up.
>
> bz2 compressed vid showing the issue -
>
> https://drive.google.com/open?id=0BxP5-S1t9VEEUE5sbUFBV20zSms
>
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