[opensuse-arm] RE: openGL ES vs openGL on aarch64 for Qt

Hi Dirk,

-----Original Message----- From: Dirk Müller Sent: 16 December 2019 11:45 To: Guillaume Gardet Cc: opensuse-arm@opensuse.org; Andreas Färber Subject: Re: openGL ES vs openGL on aarch64 for Qt

Hi Guillaume,

I'm okay with aligning aarch64 more with x86_64.. the timing is however funny because Qt just announced that over the long run they will stop embracing OpenGL.

Thanks for the news.

...

openGL ES is fine for armv6 and armv7, but I am thinking of switching aarch64 from openGL ES to openGL as aarch64 systems can now use standard PCIe gfx cards. Some aarch64 SoC still have embedded GPU which may support only ES version, though.

Are you asking because of some compilation incompatibility somewhere ? I remember there were some apps (particularly in the KDE stack) blindly assuming that OpenGL would always be available in Qt.. I was hoping we could fix those

Yes, it is one of the reason, indeed.

over time. Also note that OpenGL support is on its (slow and very long) way out of Qt: https://www.qt.io/blog/qt-5.14-has-released The plan is to go with the more "native" lower level newer APIs like Vulkan, Metal etc.

Thanks for the link.

Or are you concerned about the lack of feature by feature compatibility with x86?

IMO, having less differences between architectures is generally better.

that is a valid concern then I think, and if it makes any life easier we should align. :-) But the alignment could be by changing x86 to the more modern 3D apis .. although I don't know how painful that is going to be.

We need to support this new API anyway, not sure if we could support both for some time. Fabian, you may have a clue? Cheers, Guillaume

Greetings, Dirk

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