[Merge] lp:~albaguirre/qtubuntu/use-mir-rs-api into lp:qtubuntu

[Alan Griffiths]

> I have a question about how pixel formats work with the newer Mir API. I see
> you've removed code where Qt could set a desired pixel format on the mir
> surface - is this feature impossible to replicate?

Mir currently has "Window" and "RenderSurface" but not "surface". I assume you mean "RenderSurface"?

> This was done because sometimes the EGL config chosen may have an alpha buffer
> enabled, even if Qt doesn't need it. We used the mir pixel format to inform
> the Mir compositor that blending is not required in that case - a nice
> optimisation.

I don't see that in the RS code, but I'm still learning my way around it.
-- 
https://code.launchpad.net/~albaguirre/qtubuntu/use-mir-rs-api/+merge/321627
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