Print 22 comment(s) - last by KonradK.. on Nov 1 at 12:59 PM

No redistributable runtime for now

Microsoft launched its much anticipated Windows 7 operating system last week to great fanfare. One of the features of Windows 7 is DirectX 11, which is a superset of DirectX 10.1 already used in Vista Service Pack 2.

Windows Vista introduced the Windows Display Driver Model (WDDM), which allowed new features such as virtualized video memory and scheduling of concurrent graphics contexts. Windows 7 also uses WDDM, albeit a newer version.

Microsoft had promised that Vista users wouldn't be left in the cold, and would be able to download and use DirectX 11. It included DirectX 11 in a beta version of its "Platform Update" available in September. The final version is now available via Windows Update.

The Platform Update is meant for computers running Windows Server 2008 SP2 and Vista SP2, and is composed of four parts: The Windows Graphics, Imaging, and XPS Library contains DirectX 11, DirectCompute for hardware accelerated parallel computing, and the XPS Library for document printing.

The Windows Automation API "enables accessibility tools and test automations to access the Windows user interface in a consistent way across operating system versions".

Windows Portable Devices Platform is a basis to standardize data transfers between applications and portable devices such as mobile phones, digital cameras, or media players.

The "Windows Ribbon and Animation Manager Library" enables the use of Microsoft's "Ribbon" to be used by other programs and provides a framework for managing the scheduling and execution of user interface element animations.

Unfortunately, Windows XP users will still have to stick to DirectX 9.0c, as the older OS does not support WDDM.

Microsoft usually makes a redistributable DirectX runtime available to developers and for download. It is meant for computers without an internet connection or for users who have multiple computers, and is often bundled with games. The current redistributable is from August, and there is no word on when an updated runtime will be available.

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RE: I'm confused...
By IceBreakerG on 10/29/2009 6:47:04 PM , Rating: 2
I hope everyone will realize that DX11 is really a subset of DX10.1. The majority of the features of DX11 is compatible with DX10.1 hardware (Radeon HD 4800 series since nvidia decided it wasn't important enough). Some of the bigger features of DX11 do require new hardware though such as hardware tessellation and the compute shader (the compute shader "will" work on DX10.1 hardware though, but will have better performance on DX11 hardware obviously).

RE: I'm confused...
By stromgald30 on 10/29/2009 6:56:41 PM , Rating: 2
I hope everyone will realize that DX11 is really a subset of DX10.1.

Um, no. DirectX 11 is a superset of DirectX 10.1. DirectX 10.1 is a subset of DirectX 11. This is talking about the features of the two.

The hardware that can run DirectX 11 is a subset of the hardware that can fun DirectX 10.1. So, you're right, there will be no incompatibilities with running DirectX 11 on hardware only capable of DirectX 10.1 (or just about any older version of DirectX for that matter).

RE: I'm confused...
By IceBreakerG on 10/29/2009 7:09:33 PM , Rating: 2
Superset, subset, either way, DX11 is an extension to DX10.1 lol. Just got the 2 words mixed up.

RE: I'm confused...
By omnicronx on 10/29/2009 7:37:33 PM , Rating: 5
I don't follow, all that DX11 being a superset of DX10.1 means is that it will retain all the DX10.1 API's. That being said, DX10.1 cards will not be able to do anything beyond that, they are not 'compatible' with new features found in DX11. Its just a smart way to do things, instead of starting from scratch giving devs little incentive to program for hardware that nobody can use (ie. the move from DX9 to 10). This is where the compatibility comes in, developers can make DX11 games that people with DX10 cards can play, it will still look like DX10, but at least the compatibility is there giving devs that extra incentive.

"Vista runs on Atom ... It's just no one uses it". -- Intel CEO Paul Otellini

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