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Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window
From: |
Stefano Stabellini |
Subject: |
Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window |
Date: |
Fri, 05 Sep 2008 17:44:55 +0100 |
User-agent: |
Thunderbird 2.0.0.14 (X11/20080505) |
Jamie Lokier wrote:
>
> Fwiw, in my experience with Xine and mplayer, drawing video updates to
> the screen using OpenGL was quite a lot slower than drawing them with
> XShmImage. That needs colour conversion as video doesn't even use RGB.
>
> Probably OpenGL is faster on some hardware, and slower on some hardware.
> Don't assume it's always faster.
Yes, good point.
> Yes it very much depends on the drivers and opengl implementation. It
> isn't always possible to map the guest framebuffer into video
> (texture) memory, and also some opengl implementations are not
> particularly fast at copying textures from CPU memory to texture memory.
This is also true.
> Another way to map guest framebuffer to video memory is the XF86DGA
> extension, which is great when you can use it. I think VMware uses it
> in full-screen mode.
I went with OpenGL because I wanted the accelerated window resize
feature, and because I think it will give us more opportunities for
further improvements (for example using PBOs as soon as they are
supported by at least one open source graphic card driver).
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, (continued)
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Paul Brook, 2008/09/07
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Samuel Thibault, 2008/09/07
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Paul Brook, 2008/09/07
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Samuel Thibault, 2008/09/07
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Paul Brook, 2008/09/07
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Anthony Liguori, 2008/09/07
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Samuel Thibault, 2008/09/07
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Jamie Lokier, 2008/09/07
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Stefano Stabellini, 2008/09/08
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Jamie Lokier, 2008/09/08
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window,
Stefano Stabellini <=
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Daniel P. Berrange, 2008/09/05
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Stefano Stabellini, 2008/09/05
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Anthony Liguori, 2008/09/06
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Stefano Stabellini, 2008/09/08
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Jamie Lokier, 2008/09/08
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Stefano Stabellini, 2008/09/08
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Jamie Lokier, 2008/09/08
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Daniel P. Berrange, 2008/09/08
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Gerd Hoffmann, 2008/09/08
- Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window, Jamie Lokier, 2008/09/08