[Interest] Force DX9 in ANGLE OpenGL driver

[Thomas Sevaldrud]

This is great, thanks!

I actually had no problems with DX11, I just wanted to test for both target
platforms to see if I got any weirdness :-) It worked nicely on native GL,
ANGLE/DX11 and ANGLE DX9.

ANGLE really saved my butt on this project, since the target platform was
an old Intel GM945 with only OpenGL 1.4, so instead of having to write old
assembly shaders, I just had to support OpenGL ES

- T


On Sat, Jan 10, 2015 at 5:33 PM, Andrew Knight <qt at panimo.net> wrote:

> Hi Thomas,
>
> On 01/10/2015 03:01 PM, Thomas Sevaldrud wrote:
>
>> Hi, is there any way to force ANGLE to use Directx9 instead of 11
>> through the Qt ANGLE wrappers?
>>
>
> Yes, set QT_ANGLE_PLATFORM=d3d9
>
>  Any magic environment variables etc?
>>
>
> QT_ANGLE_PLATFORM={d3d11,d3d9,warp}
>
> By default, d3d11 is used (if initialization succeeds), d3d9 is used as a
> fallback, and warp (the D3D11 software rasterizer) is used if neither
> hardware configs initialize.
>
> I'll now update a doc patch for this. Out of interest, can you describe
> the problems you are experiencing with D3D11? There is currently work in
> progress to blacklist certain GPUs/drivers which behave badly with D3D11,
> so it would be good to hear about your situation.
>
>
>> Cheers,
>> Thomas
>>
>>
>> _______________________________________________
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>> http://lists.qt-project.org/mailman/listinfo/interest
>>
>>
> -Andrew
>
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