F22 Self Contained Change: Wine to use mesa Direct3D

[Pasi Kärkkäinen]

Hey, 

On Wed, Jan 14, 2015 at 01:28:57PM +0100, Jaroslav Reznik wrote:
> = Proposed Self Contained Change: Wine to use mesa Direct3D =
> https://fedoraproject.org/wiki/Changes/Wine_to_use_mesa_Direct3D
> 
> Change owner(s): Igor Gnatenko <ignatenkobrain at fedoraproject.org> 
> 
> Enhancing mesa and wine with Direct3D9 support will increase performance and 
> reduce resource usage in applications which using D3D9 framework. 
> 
> == Detailed Description ==
> When playing d3d9 games on Wine, their d3d9 calls are translated to OpenGL. 
> This is complicated process, because you have to deal with different drivers 
> having different extensions available, and the fact that opengl and d3d9 don't 
> map perfectly together. Gallium Nine implements the d3d9 API with Gallium 
> internal API, which maps better to d3d9 than OpenGL. You remove some layers of 
> translation in the process which enables better performance. Gallium Nine is 
> not as mature as Wine OpenGL translation, and it is likely to have more bugs, 
> but when the games work, you can expect 5-10% improvement for gpu limited 
> games, or much more (sometimes 100%) for cpu limited games.
> 
> what is Gallium: Gallium is an internal graphic driver abstraction of Mesa to 
> enable support of non-opengl languages more easily (it is used for vdpau and 
> vaapi on r600/radeonsi for example). It is used by nouveau and r300 up to 
> radeonsi for AMD. Intel OpenGL support doesn't use gallium, but a gallium 
> driver named ilo exists, but isn't sponsored by Intel.
> 
> In practice, games have also smoother frame rate on Gallium Nine. Gallium Nine 
> has good DRI_PRIME support, and if you have a system with an iGPU+dGPU, you 
> can play without issues with the parameters DRI_PRIME=1 thread_submit=true
> 
> https://wiki.ixit.cz/d3d9 
>

The wiki link doesn't seem to work..

Is it possible for the user to tell wine which backend to use? OpenGL or Gallium-Nine ? 


-- Pasi