Re: [PATCH v5 0/4] MR4857: gdi32,win32u: Implement D3DKMTEnumAdapters2.

[Zhiyi Zhang (＠zhiyi)]

Zhiyi Zhang (@zhiyi) commented about dlls/win32u/sysparams.c:
> -
>    if (gpu->luid.LowPart || gpu->luid.HighPart)
> -
>    {
> -
>        open_adapter_from_luid.AdapterLuid = gpu->luid;
> -
> -
>        /* give the GDI driver a chance to be notified about new adapter handle */
> -
>        if (NT_SUCCESS( NtGdiDdDDIOpenAdapterFromLuid( &open_adapter_from_luid ) ))
> -
>        {
> -
>            desc->pAdapters[idx].AdapterLuid = gpu->luid;
> -
>            desc->pAdapters[idx].hAdapter = open_adapter_from_luid.hAdapter;
> -
>            desc->pAdapters[idx].bPrecisePresentRegionsPreferred = FALSE;
> -
>            desc->pAdapters[idx].NumOfSources = 0;
> -
> -
>            LIST_FOR_EACH_ENTRY( adapter, &adapters, struct adapter, entry )
> -
>            {
> -
>                if (!memcmp( &gpu->luid, &adapter->gpu_luid, sizeof(LUID) ) )
> -
>                    desc->pAdapters[idx].NumOfSources++;

You can cache NumOfSources during the GPU cache construction. That will save us from calculating NumOfSources for each NtGdiDdDDIEnumAdapters2 call.