Re: DXVK + DComp causes graphics rendering to fail

After the adjustments in DXVK, it's working now.

https://github.com/doitsujin/dxvk/issues/5053

On Fri, Jun 27, 2025 at 2:06 PM zhengxianwei <[email protected]> wrote:

> I'm not sure whether this issue should be posted on the DXVK forum or
> here. If I've posted it in the wrong place, I apologize.
>
> I wrote a test program called dcomp_test.exe, which is already working
> under Wine. Its main function is to render circles, and the effect looks
> like this:
>
>
> [image: image.png]
>
> The actual operation is...： surface content = gdi * backgroup_alpha +
> swapchain[0] * foreground_alpha
>
>
> However, after replacing Wine's built-in DLLs with the ones I built from
> DXVK
>
> specifically dxgi, d3d8, d3d9, d3d10core, d3d11, and d3d12
>
> I found that the circle was no longer rendered.
>
> The image extracted from the swapchain contained all zeros.
> [image: image.png]
>
> I did a quick trace and confirmed that it reached:
>
> 1. ID3D11DeviceContext1_DrawIndexed
> 2. ID3D11DeviceContext1_Draw
>
>
> https://github.com/wine-mirror/wine/blob/80bc1338bea7d9dac78ab449b4505e5bb91e7ba3/dlls/d2d1/device.c#L187
>
> So I feel that the circle is indeed being rendered onto the DXVK D3D11
> swapchain,
>
> but I'm not sure at which step the content fails to be retrieved correctly.
>
> Any suggestions are welcome
>
>