[Development] QT_XCB_NATIVE_PAINTING makes worse that without of it

[Denis Shienkov]

Allan,

so, do we need in OpenGL support for 2-d acceleration in QtWidget 
applications running via X11? When, e.g. we use QPainter?

I'm already confused... What we need to have to be use the GPU 
acceleration on X11 with QtWidgets?


24.03.2019 11:51, Allan Sandfeld Jensen пишет:
> On Sonntag, 24. März 2019 09:36:48 CET Denis Shienkov wrote:
>> Allan,
>>
>>   > And typically using the OpenGL backed will be even faster unless you
>>
>> need to run X11 remotely.
>>
>> Do you mean that OpenGL via EGLFS, without of X11 is faster? For QtWidgets?
>>
> No, I mean that if you take X11 over the network and run a client remotely,
> the raster engine will require a higher bandwidth than the native X11 engine.
> If you run locally, the OpenGL engine is the fastest for stuff like image
> blitting  and scaling, but no need to use EGLFS.
>
> 'Allan
>
>