Re: [Qemu-devel] Question about QEMU

[Stefan Hajnoczi <stefanha@gmail.com>]

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On Thu, May 10, 2018 at 05:55:38PM +0900, 유원상 wrote:
> Hi,
> This is Wonsang Ryu.
> I'm developer working in South Korea.

Welcome!

> Do you have forum or community for any developer?
> I want share my issues with other developers.
> I have some question about QEMU.

That's what the qemu-devel@nongnu.org mailing list is for.  You can also
ask questions on the #qemu irc.oftc.net IRC channel.

> I am porting an embedded OS for emulator to QEMU.
> My environment is
> Host OS : Ubuntu 14.04 64bit
> Guest OS : x86 Embedded Linux OS (like as open embedded)
> Guest UI Options : using SDL2, virglrenderer
> Basic running is ok.
> 
> I have a problem about screen resolution.
> Recommended resolution of my guest OS is 1920x1080.
> If a QEMU window size is 1920x1080, it is clear.
> But, if I change smaller of a QEMU window size, it does not display
> clearly.(ex: 1280x720)
> In this case, QEMU windows size in host is 1280x720, and guest screen
> resolution is 1920x1080.
> For example, it is similar with same resolution support of different
> monitor size.
> 
> I think, it need to enable the MultiSampling(or anti-aliasing) of OpenGL.
> Does not support MultiSampleing in QEMU yet?
> Or, is it related with virglrenderer?
> 
> I found, QEMU does not use MULTISAMPLING option in "sdl2-gl.c".
> And, "nr_samples" is always zero in "virtio-gpu-3d.c".
> I think, it need to apply multisampling to texture received from
> virglrenderer.
> How can I enable a multisampling option in QEMU?
> 
> I want to hold the resolution of the guest OS and scale the QEMU windows in
> the host OS.
> When scale QEMU windows, I want display is more clear even though small.
> Is it possible?

CCing Gerd (graphics maintainer) and Marc-André, who might know the answer.

Stefan

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