[EXTERNAL] Re: Xbox Series S/X UWP

[Jesse Natalie]

Oh, maybe I just missed them - last time I looked I thought there were only D3D11 and D3D9. Guess I've got extensions I should go implement then.

-Jesse

-----Original Message-----
From: mesa-dev <mesa-dev-bounces at lists.freedesktop.org> On Behalf Of James Jones
Sent: Monday, June 13, 2022 9:54 AM
To: Jesse Natalie <jenatali at microsoft.com>; Daniel Price <riverprice at hotmail.com>; mesa-dev at lists.freedesktop.org
Subject: [EXTERNAL] Re: Xbox Series S/X UWP

On 6/6/22 09:22, Jesse Natalie wrote:
> (Hopefully this goes through and not to spam like last time I tried to
> respond...)
> 
> No, neither of these would currently work with UWP.
> 
> The primary reason is that neither Khronos API has extensions to 
> initialize the winsys on top of the UWP core window infrastructure. In 
> theory, you could initialize Dozen for offscreen rendering and then 
> explicitly marshal the contents out - that would probably work actually.
> There's 2 more gotchas there though:
> 
>  1. The ICD loaders (OpenGL32.dll, Vulkan-1.dll) are not available in
>     the UWP environment. You could explicitly use the non-ICD version of
>     GL (i.e. Mesa's OpenGL32.dll from the libgl-gdi target), include the
>     open-source Vulkan ICD loader, or use the ICD version of either
>     (OpenGLOn12.dll/libgallium_wgl.dll for GL - I plan to delete the
>     former at some point and just use the latter at some point;
>     vulkan_dzn.dll for VK).
>  2. There's not currently extensions for D3D12 interop either spec'd or
>     implemented.

What do you mean by not spec'd? Vulkan and OpenGL both have standard (KHR and EXT respectively) D3D12 interop extensions, in addition to Vulkan<->GL, Vulkan<->D3D11-and-lower.

Thanks,
-James

> There's one more problem for GL that I don't think is problematic for 
> VK, which is that it uses APIs that are banned from the UWP 
> environment, specifically around inserting window hooks for Win32 
> framebuffer lifetime management. So you'd probably have to build a 
> custom version that has all of that stuff stripped out to get it to be shippable in a UWP.
> 
> We (Microsoft) don't really have plans to add this kind of stuff, at 
> least not in the near future, but I'd be open to accepting 
> contributions that enable this.
> 
> -Jesse
> 
> *From:* mesa-dev <mesa-dev-bounces at lists.freedesktop.org> *On Behalf 
> Of *Daniel Price
> *Sent:* Monday, June 6, 2022 5:41 AM
> *To:* mesa-dev at lists.freedesktop.org
> *Subject:* [EXTERNAL] Xbox Series S/X UWP
> 
> 	
> 
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> 
> Hi, I was wandering if these two layers would work with UWP on Xbox 
> Series Console or if not will there be plans to add support?
> 
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> Many Thanks
> 
> Dan
>