[Mesa-dev] [PATCH 2/2] st/vdapu: use lanczos filter for scaling v4

[Leo Liu]

On 09/01/2016 11:54 AM, Nayan Deshmukh wrote:
> Hi Leo,
>
> I saw the code in dri3_glx.c and I could somewhat relate some basic 
> code structure
> to the vl_winsys_dri3.c. But I am new to this and not aware of the 
> terminology
> that you used about the buffers. Could you please explain what needs 
> to be done
> in more detail or point me to where I can read about it.

I believe it's from loader_dri3_helper.c with "is_different_gpu" 
condition true, that will include back buffer and front buffer case.
you could try only back buffer case for now.

Regards,
Leo


>
> Regards,
> Nayan.
>
> On Thu, Sep 1, 2016 at 7:08 PM, Leo Liu <leo.liu at amd.com 
> <mailto:leo.liu at amd.com>> wrote:
>
>     Hi Nayan,
>
>     About the Prime, I think you have to do is to separate decoder
>     render buffer and presentation back buffer,
>     and copy back and forth between them for presentation and update.
>     You might refer to similar implement
>     in glx and egl from loader_dri3_helper.c by grep "is_different_gpu"
>
>
>     Regards,
>     Leo
>
>
>
>     On 09/01/2016 05:18 AM, Nayan Deshmukh wrote:
>>     Thanks, Michel you saved a lot of my time.
>>
>>     Christian, I will get in touch with Leo and get started on this
>>     task.
>>
>>     Regards,
>>     Nayan.
>>
>>     On Thu, Sep 1, 2016 at 2:08 PM, Christian König
>>     <christian.koenig at amd.com <mailto:christian.koenig at amd.com>> wrote:
>>
>>         Am 01.09.2016 um 05:28 schrieb Michel Dänzer:
>>
>>             On 31/08/16 06:53 PM, Nayan Deshmukh wrote:
>>
>>                 Hi Christian,
>>
>>                 You missed a few things in the merge. I will send in
>>                 the updated patch.
>>
>>                 I looked at the code in vl_winsys.c and vl_winsys3.c
>>                 and also
>>                 at the code in presentation.c where delayed rendering
>>                 is used. I was trying
>>                 to compile using vl_dri3_screen_create() but its
>>                 giving me some error. I
>>                 will look into the error tonight. My hardware has
>>                 PRIME configuration. So
>>                 is my hardware suitable for it?
>>
>>             The code in vl_winsys_dri3.c doesn't support PRIME yet.
>>             Might not be too
>>             hard to add though. Grep for "is_different_gpu". Leo
>>             might have done
>>             some work on this, so coordinate with him before spending
>>             too much
>>             effort on this.
>>
>>         Thanks for the note, I assumed Leo already implemented that,
>>         but wasn't 100% sure.
>>
>>         Nayan since you are one of the few contributors with a prime
>>         configuration I think it would make sense for you to hack on
>>         this first.
>>
>>         Would also help getting you into the code and a bit more into
>>         the stack in general.
>>
>>         Regards,
>>         Christian.
>>
>>
>>
>>
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