Re: [PATCH v2 0/2] MR9125: mfmediaengine: Suppport TransferVideoFrame() to IWICBitmap.

[Nikolay Sivov (＠nsivov)]

Nikolay Sivov (@nsivov) commented about dlls/mfmediaengine/main.c:
> +    {
> +        FIXME("Scaling/letterboxing is not implemented.\n");
> +        goto done;
> +    }
> +
> +    if (!IsEqualGUID(&format, &GUID_WICPixelFormat32bppBGR) && !IsEqualGUID(&format, &GUID_WICPixelFormat32bppBGRA))
> +    {
> +        FIXME("Unsupported format %s.\n", wine_dbgstr_guid(&format));
> +        goto done;
> +    }
> +    if (engine->video_frame.output_format != DXGI_FORMAT_B8G8R8A8_UNORM
> +            && engine->video_frame.output_format != DXGI_FORMAT_B8G8R8X8_UNORM)
> +    {
> +        FIXME("Unsupported format %#x.\n", engine->video_frame.output_format);
> +        goto done;
> +    }
> So does this silently drop alpha channel if it's doing DXGI_FORMAT_B8G8R8A8_UNORM -> WICPixelFormat32bppBGR?

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9125#note_118117