Upcoming Qt switch to OpenGL ES on arm64

[Lisandro Damián Nicanor Pérez Meyer]

Hi Bret!

El viernes, 23 de noviembre de 2018 11:14:34 -03 psi29a at gmail.com escribió:
> Just chiming in here as package maintainer of an effected package, OpenMW
> and also an upstream developer of said software, along with contributor to
> OpenSceneGraph.
> 
> Here are some related open bugs involving Qt and GLESv2 and arm*:
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850021
> ^-- RM: openmw [armhf] -- RoQA; needs OSG built against libGL
[snip]

Yes, that's a drawback we are not hiding. Applications needing Desktop OpenGL 
would be left out. But...


> If you say that arm64 has to be GLESv2 as well, then that is yet another
> arch that OpenMW can't be built for.  Before the GLESv2 switch, OpenMW
> worked just fine on arm* hardware, including the Raspberry Pi/Raspbian with
> the VC4 mesa driver that has OpenGL 2.0 support.

...one thing is running and quite another is: how well does it performs when 
doing 100% CPU-based OpenGL? Are your users *really* interested to use your 
application when all drawing must be CPU-based?

[snip]
 
> I beg you, please either reverse the GLES decision in Qt or provide two
> separate packages for GL or GLES support.

I'm afraid providing two set ups is a non-go (alas, we would be doing that 
already and avoiding all this). And I don't there are many armel/armhf users 
with hardware Desktop OpenGL in their boards.

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