[Qemu-devel] Question about QEMU

[유원상]

Hi,
This is Wonsang Ryu.
I'm developer working in South Korea.

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

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?

Please help me.
Thanks.