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DirectX

"DX9" redirects here. For the synthesizer, see Yamaha DX9.
Collection of multimedia related APIs on Microsoft platforms

Microsoft DirectX is a collection of application programming interfaces (APIs) for handling tasks related to multimedia, especially game programming and video, on Microsoft platforms. Originally, the names of these APIs all began with "Direct", such as Direct3D, DirectDraw, DirectMusic, DirectPlay, DirectSound, and so forth. The name DirectX was coined as a shorthand term for all of these APIs (the X standing in for the particular API names) and soon became the name of the collection. When Microsoft later set out to develop a gaming console, the X was used as the basis of the name Xbox to indicate that the console was based on DirectX technology.[1] The X initial has been carried forward in the naming of APIs designed for the Xbox such as XInput and the Cross-platform Audio Creation Tool (XACT), while the DirectX pattern has been continued for Windows APIs such as Direct2D and DirectWrite.

Direct3D (the 3D graphics API within DirectX) is widely used in the development of video games for Microsoft Windows and the Xbox line of consoles. Direct3D is also used by other software applications for visualization and graphics tasks such as CAD/CAM engineering. As Direct3D is the most widely publicized component of DirectX, it is common to see the names "DirectX" and "Direct3D" used interchangeably.

The DirectX software development kit (SDK) consists of runtime libraries in redistributable binary form, along with accompanying documentation and headers for use in coding. Originally, the runtimes were only installed by games or explicitly by the user. Windows 95 did not launch with DirectX, but DirectX was included with Windows 95 OEM Service Release 2.[2]Windows 98 and Windows NT both shipped with DirectX, as has every version of Windows released since. The SDK is available as a free download. While the runtimes are proprietary, closed-source software, source code is provided for most of the SDK samples. Starting with the release of Windows 8 Developer Preview, DirectX SDK has been integrated into Windows SDK.[3]

Development history[edit]

In late , Microsoft was ready to release Windows 95, its next operating system. An important factor in the value consumers would place on it was the programs that would be able to run on it. Three Microsoft employees—Craig Eisler, Alex St. John, and Eric Engstrom—were concerned because programmers tended to see Microsoft's previous operating system, MS-DOS, as a better platform for game programming, meaning few games would be developed for Windows 95 and the operating system would not be as much of a success. This was compounded by negative reception surrounding the Windows port of the video game The Lion King. The game used WinG, which crashed on Compaq Presarios that came shipped with it following a partnership between Compaq and Disney, as the Cirrus Logic display drivers used by the Presarios were not thoroughly tested with the API.[4]

DOS allowed direct access to video cards, keyboards, mice, sound devices, and all other parts of the system, while Windows 95—with its protected memory model—restricted access to all of these, working on a much more standardized model. Microsoft needed a quick solution for programmers; the operating system was only months away from being released. Eisler (development lead), St. John, and Engstrom (program manager) worked together to fix this problem, with a solution that they eventually named DirectX.

The first version of DirectX was released in September as the Windows Games SDK. It was the Win32 replacement for the DCI[5] and WinG APIs for Windows DirectX allowed all versions of Microsoft Windows, starting with Windows 95, to incorporate high-performance multimedia. Eisler wrote about the frenzy to build DirectX 1 through 5 in his blog.[6]

DirectX became a component of Windows itself with the releases of Windows 95 OSR2 and Windows NT in mid Since Windows 95 was itself still new and few games had been released for it, Microsoft engaged in heavy promotion of DirectX to developers who were generally distrustful of Microsoft's ability to build a gaming platform in Windows. Alex St. John, the evangelist for DirectX, staged an elaborate event at the Computer Game Developers Conference which game developer Jay Barnson described as a Roman theme, including real lions, togas, and something resembling an indoor carnival.[7] It was at this event that Microsoft first introduced Direct3D and DirectPlay, and demonstrated multiplayer MechWarrior 2 being played over the Internet.

The DirectX team faced the challenging task of testing each DirectX release against an array of computer hardware and software. A variety of different graphics cards, audio cards, motherboards, CPUs, input devices, games, and other multimedia applications were tested with each beta and final release. The DirectX team also built and distributed tests that allowed the hardware industry to confirm that new hardware designs and driver releases would be compatible with DirectX.

Prior to DirectX, Microsoft had included OpenGL on their Windows NT platform.[8] At the time, OpenGL required "high-end" hardware and was focused on engineering and CAD uses.[citation needed] Direct3D was intended to be a Microsoft controlled alternative to OpenGL, focused initially on game use. As 3D gaming grew, OpenGL developed to include better support for programming techniques for interactive multimedia applications like games, giving developers choice between using OpenGL or Direct3D as the 3D graphics API for their applications. At that point a "battle" began between supporters of the cross-platform OpenGL and the Windows-only Direct3D. Incidentally, OpenGL was supported at Microsoft by the DirectX team. If a developer chose to use OpenGL 3D graphics API, the other APIs of DirectX are often combined with OpenGL in computer games because OpenGL does not include all of DirectX's functionality (such as sound or joystick support).

In a console-specific version, DirectX was used as a basis for Microsoft's Xbox, Xbox and Xbox Oneconsole API. The API was developed jointly between Microsoft and Nvidia, which developed the custom graphics hardware used by the original Xbox. The Xbox API was similar to DirectX version , but is non-updateable like other console technologies. The Xbox was code named DirectXbox, but this was shortened to Xbox for its commercial name.[9]

In , Microsoft released DirectX 9 with support for the use of much longer shader programs than before with pixel and vertex shader version Microsoft has continued to update the DirectX suite since then, introducing Shader Model in DirectX c, released in August

As of April , DirectShow was removed from DirectX and moved to the Microsoft Platform SDK instead.

DirectX has been confirmed to be present in Microsoft's Windows Phone 8.[10]

Real-time raytracing was announced as DXR in

Logos[edit]

The original logo resembled a deformed radiation warning symbol. Controversially, the original name for the DirectX project was the "Manhattan Project", a reference to the US nuclear weapons initiative. Alex St. John, head of Microsoft DirectX evangelism at the time, claims[11] that the connotation of the ultimate outcome of the Manhattan Project (the nuclear bombing of Japan) is intentional, and that DirectX and its sister project, the Xbox (which shares a similar logo), were meant to displace Japanese videogame-makers from their dominance of the video game industry.[12] However, Microsoft publicly denies this account, instead claiming that the logo is merely an artistic design.[12]

Components[edit]

DirectX is composed of multiple APIs:

Microsoft has deprecated the following components:

DirectX functionality is provided in the form of COM-style objects and interfaces. Additionally, while not DirectX components themselves, managed objects have been built on top of some parts of DirectX, such as Managed Direct3D[15] and the XNA graphics library[16] on top of Direct3D 9.

Microsoft distributes debugging tool for DirectX called "PIX". [17]

Versions[edit]

DirectX 9[edit]

This section needs expansion. You can help by adding to it.(October )

DirectX 9 was released in for Windows 98 and XP, and currently is supported by all subsequent versions. Microsoft continues to make changes in DirectX c, causing support to be dropped for some of the aforementioned operating systems. As of January , Windows or XP is required. This also introduced Shader Model containing Pixel Shader and Vertex Shader Windows XP SP2 and newer include DirectX c,[18] but may require a newer DirectX runtime redistributable installation for DirectX c applications compiled with the February DirectX SDK or newer.

DirectX 10[edit]

Microsoft DirectX 10 logo wordmark

A major update to DirectX API, DirectX 10 ships with and is only available with Windows Vista and later; previous versions of Windows such as Windows XP are not able to run DirectX exclusive applications. Rather, programs that are run on a Windows XP system with DirectX 10 hardware simply resort to the DirectX c code path, the latest available for Windows XP computers.[19]

Changes for DirectX 10 were extensive. Many former parts of DirectX API were deprecated in the latest DirectX SDK and are preserved for compatibility only: DirectInput was deprecated in favor of XInput, DirectSound was deprecated in favor of the Cross-platform Audio Creation Tool system (XACT) and additionally lost support for hardware accelerated audio, since the Vista audio stack renders sound in software on the CPU. The DirectPlay www.oxygen.com.ro was also removed and was replaced with www.oxygen.com.ro; games that rely on this DLL must duplicate it and rename it to www.oxygen.com.ro

In order to achieve backwards compatibility, DirectX in Windows Vista contains several versions of Direct3D:[20]

  • Direct3D 9: emulates Direct3D 9 behavior as it was on Windows XP. Details and advantages of Vista's Windows Display Driver Model are hidden from the application if WDDM drivers are installed. This is the only API available if there are only XP graphic drivers (XDDM) installed, after an upgrade to Vista for example.
  • Direct3D 9Ex (known internally during Windows Vista development as L or 9.L): allows full access to the new capabilities of WDDM (if WDDM drivers are installed) while maintaining compatibility for existing Direct3D applications. The Windows Aero user interface relies on D3D 9Ex.
  • Direct3D 10: Designed around the new driver model in Windows Vista and featuring a number of improvements to rendering capabilities and flexibility, including Shader Model 4.

Direct3D is an incremental update of Direct3D which shipped with, and required, Windows Vista Service Pack 1.[21] This release mainly sets a few more image quality standards for graphics vendors, while giving developers more control over image quality.[22] It also adds support for cube map arrays, separate blend modes per-MRT, coverage mask export from a pixel shader, ability to run pixel shader per sample, access to multi-sampled depth buffers[23] and requires that the video card supports Shader Model or higher and bit floating-point operations. Direct3D still fully supports Direct3D 10 hardware, but in order to utilize all of the new features, updated hardware is required.[24]

DirectX 11[edit]

Microsoft DirectX 11 logo wordmark

Microsoft unveiled DirectX 11 at the Gamefest 08 event in Seattle, with the major scheduled features including GPGPU support (DirectCompute), and Direct3D 11 with tessellation support[25][26] and improved multi-threading support to assist video game developers in developing games that better utilize multi-core processors.[27] Direct3D 11 runs on Windows Vista, Windows 7, Windows 8 and Windows Parts of the new API such as multi-threaded resource handling can be supported on Direct3D 9/10/class hardware. Hardware tessellation and Shader Model require Direct3D 11 supporting hardware.[28] Microsoft has since released the Direct3D 11 Technical Preview.[29] Direct3D 11 is a strict superset of Direct3D — all hardware and API features of version are retained, and new features are added only when necessary for exposing new functionality. This helps to keep backwards compatibility with previous versions of DirectX.

Microsoft released the Final Platform Update for Windows Vista on October 27, , which was 5 days after the initial release of Windows 7 (launched with Direct3D 11 as a base standard).

Since then, four updates for DirectX 11 were released:

  • DirectX is included in Windows 8. It supports WDDM for increased performance, features improved integration of Direct2D (now at version ), Direct3D, and DirectCompute, and includes DirectXMath, XAudio2, and XInput libraries from the XNA framework. It also features stereoscopic 3D support for gaming and video.[30] DirectX was also partially backported to Windows 7, via the Windows 7 platform update.[31][32]
  • DirectX is included in Windows (including the RT version) and Windows Server R2.[33] It added some new features to Direct2D like geometry realizations.[34] It also added swap chain composition, which allows some elements of the scene to be rendered at lower resolutions and then composited via hardware overlay with other parts rendered at higher resolution.[35]
  • DirectX X is a superset of DirectX running on the Xbox One.[36] It actually includes some features, such as draw bundles, that were later announced as part of DirectX [37]
  • DirectX was announced along with DirectX 12 at GDC and released in It is meant to complement DirectX 12 as a higher-level alternative.[38] It is included with Windows [33]

DirectX 12[edit]

DirectX 12 was announced by Microsoft at GDC on March 20, , and was officially launched alongside Windows 10 on July 29,

The primary feature highlight for the new release of DirectX was the introduction of advanced low-level programming APIs for Direct3D 12 which can reduce driver overhead. Developers are now able to implement their own command lists and buffers to the GPU, allowing for more efficient resource utilization through parallel computation. Lead developer Max McMullen stated that the main goal of Direct3D 12 is to achieve "console-level efficiency on phone, tablet and PC".[39] The release of Direct3D 12 comes alongside other initiatives for low-overhead graphics APIs including AMD's Mantle for AMD graphics cards, Apple's Metal for iOS and macOS and Khronos Group's cross-platform Vulkan.

Multiadapter support will feature in DirectX 12 allowing developers to utilize multiple GPUs on a system simultaneously; multi-GPU support was previously dependent on vendor implementations such as AMD CrossFireX or NVIDIA SLI.[40][41][42][43]

  • Implicit Multiadapter support will work in a similar manner to previous versions of DirectX where frames are rendered alternately across linked GPUs of similar compute-power.
  • Explicit Multiadapter will provide two distinct API patterns to developers. Linked GPUs will allow DirectX to view graphics cards in SLI or CrossFireX as a single GPU and use the combined resources. Whereas Unlinked GPUs will allow GPUs from different vendors to be utilized by DirectX, such as supplementing the dedicated GPU with the integrated GPU on the CPU, or combining AMD and NVIDIA cards. However, elaborate mixed multi-GPU setups requires significantly more attentive developer support.

DirectX 12 is supported on all Fermi and later Nvidia GPUs, on AMD's GCN-based chips and on Intel's Haswell and later processors' graphics units.[44]

At SIGGRAPH , Intel released a demo showing a computer generated asteroid field, in which DirectX 12 was claimed to be 50–70% more efficient than DirectX 11 in rendering speed and CPU power consumption.[45][46]

Ashes of the Singularity was the first publicly available game to utilize DirectX Testing by Ars Technica in August revealed slight performance regressions in DirectX 12 over DirectX 11 mode for the Nvidia GeForce Ti, whereas the AMD Radeon R9 x achieved consistent performance improvements of up to 70% under DirectX 12, and in some scenarios the AMD outperformed the more powerful Nvidia under DirectX The performance discrepancies may be due to poor Nvidia driver optimizations for DirectX 12, or even hardware limitations of the card which was optimized for DirectX 11 serial execution, however the exact cause remains unclear.[47]

DirectX 12 APIs are also featured on the Xbox, however the DirectX 12 code is not directly portable between PC and Xbox One due to inherent differences between the two platforms.[48][49] The performance improvements of DirectX 12 on the Xbox are not as substantial as on the PC.[50]

In March , DirectX Raytracing (DXR) was announced, capable of real-time ray-tracing on supported hardware,[51] and the DXR API was added in the Windows 10 October update.

In Microsoft announced the arrival of DirectX 12 to Windows 7 but only as plug-in for certain game titles.[52]

DirectX 12 Ultimate[edit]

Microsoft revealed DirectX 12 Ultimate in March DirectX 12 Ultimate will unify common library on both Windows 10 computers and on the Xbox Series X and other fourth-generation Xbox consoles. Among new features in Ultimate includes DirectX Raytracing , Variable Rate Shading which gives programmers control over the level of detail of shading depending on design choices, Mesh Shaders, and Sampler Feedback.[53][54]

Version history[edit]

DirectX 1
DirectX 2
DirectX 3
DirectX 5
DirectX 6
DirectX 7
DirectX 8
DirectX 9
DirectX 10
DirectX 11
DirectX 12
Version Release date Notes
Major Minor Number
1 September 30,
2 Was shipped only with a few 3rd party applications
aJune 5, Windows 95 OSR2 and Windows NT
3 September 15, &#;
Later package of DirectX included Direct3D
aDecember Windows NT SP3 (and above)
Last supported version of DirectX for Windows NT
bDecember This was a very minor update to a that fixed a cosmetic problem with the Japanese version of Windows 95
4 Never releasedDirectX 4 was never released. Raymond Chen of Microsoft explained in his book, The Old New Thing, that after DirectX 3 was released, Microsoft began developing versions 4 and 5 at the same time. Version 4 was to be a shorter-term release with small features, whereas version 5 would be a more substantial release. The lack of interest from game developers in the features stated for DirectX 4 resulted in it being shelved, and the large amount of documents that already distinguished the two new versions resulted in Microsoft choosing to not re-use version 4 to describe features intended for version 5.[55][56]
5 (RC55)August 4, Available as a beta for Windows that would install on Windows NT
(RC00)May 5, DirectX release for Windows 95
(RC0)June 25, Windows 98 exclusive
6 (RC3)August 7, [57]Windows CE as implemented on Dreamcast and other devices
(RC0)February 3, [58]
a (RC0)May 5, [59]Windows 98 Second Edition exclusive
7 (RC1)September 22, [60][61]
February 17, Windows
aDecember 17, Released only for Windows 95 and 98[62][63]
(RC0)March 8,
(RC1)
(RC1)September 14, [64]Windows Me exclusive. Last version to have built-in RGB software rendering support
8 (RC10)November 10, [65]
a (RC14)January 24, [66]Last supported version for Windows 95 and last version to have software rendering support in www.oxygen.com.ro
October 25, Windows XP, Windows XP SP1, Windows Server and Xbox exclusive
(RC7)November 8, This version is for the down level operating systems (Windows 98, Windows Me and Windows )
a (RC?)This release includes an update to Direct3D (www.oxygen.com.ro)
b (RC7)June 25, This update includes a fix to DirectShow on Windows (www.oxygen.com.ro)
(RC0)Same as the DirectX b but includes DirectPlay
9 (RC4)December 19, Periodic hybrid bit/bit updates were released for DirectX 9, starting from (RC0 for DX c) in October , released bimonthly until August , and quarterly thereafter. The last periodic update was released in June [67]
a (RC6)March 26,
b (RC2)August 13,
c[68]July 22, First c version and last supported version for Windows 98[69]
Windows XP SP2 exclusive
(RC0)August 4, [59]
December 8, Last supported version for Windows 98 Second Edition[69]
August 6, / April 21, *Xbox , Windows XP SP2, SP3*, Windows Server SP1 and Windows Server R2
October 27, Last supported version for Windows Me
10 10November 30, Windows Vista exclusive
February 4, Windows Vista SP1, Windows Server
Includes Direct3D
April 28, Windows Vista SP2, Windows Server SP2
Includes Direct3D
11 11October 22, Windows 7, Windows Server R2
October 27, Windows Vista SP2 and Windows Server SP2, through the Platform Update for Windows Vista and Windows Server [70]
February 16, Windows 7 SP1, Windows Server R2 SP1
August 1, Windows 7 SP1, Windows 8, Windows RT, Windows Server
October 18, Windows , Windows RT, Windows Server R2, Xbox One
12 12July 29, Windows 10, Xbox One
March 20, Windows 10, Depth Bounds Testing and Programmable MSAA added[71][72]
October 2, Windows 10, DirectX Raytracing support added[73]
May 19, Windows 10, Variable Rate Shading (VRS) support added[74]

The version number as reported by Microsoft's DxDiag tool (version and higher) use the www.oxygen.com.ro format for version numbers. However, the DirectX and Windows XP MSDN page claims that the registry always has been in the www.oxygen.com.ro format. Therefore, when the above table lists a version as '' Microsoft's DxDiag tool may have it as ''.[75]

Compatibility[edit]

Various releases of Windows have included and supported various versions of DirectX, allowing newer versions of the operating system to continue running applications designed for earlier versions of DirectX until those versions can be gradually phased out in favor of newer APIs, drivers, and hardware.

APIs such as Direct3D and DirectSound need to interact with hardware, and they do this through a device driver. Hardware manufacturers have to write these drivers for a particular DirectX version's device driver interface (or DDI), and test each individual piece of hardware to make them DirectX compatible. Some hardware devices have only DirectX compatible drivers (in other words, one must install DirectX in order to use that hardware). Early versions of DirectX included an up-to-date library of all of the DirectX compatible drivers currently available. This practice was stopped however, in favor of the web-based Windows Update driver-update system, which allowed users to download only the drivers relevant to their hardware, rather than the entire library.

Prior to DirectX 10, DirectX runtime was designed to be backward compatible with older drivers, meaning that newer versions of the APIs were designed to interoperate with older drivers written against a previous version's DDI. The application programmer had to query the available hardware capabilities using a complex system of "cap bits" each tied to a particular hardware feature. Direct3D 7 and earlier would work on any version of the DDI, Direct3D 8 requires a minimum DDI level of 6 and Direct3D 9 requires a minimum DDI level of 7.[76] However, the Direct3D 10 runtime in Windows Vista cannot run on older hardware drivers due to the significantly updated DDI, which requires a unified feature set and abandons the use of "cap bits".

Direct3D introduces "feature levels" 10_0 and 10_1, which allow use of only the hardware features defined in the specified version of Direct3D API. Direct3D 11 adds level 11_0 and "10 Level 9" - a subset of the Direct3D 10 API designed to run on Direct3D 9 hardware, which has three feature levels (9_1, 9_2 and 9_3) grouped by common capabilities of "low", "med" and "high-end" video cards; the runtime directly uses Direct3D 9 DDI provided in all WDDM drivers. Feature level 11_1 has been introduced with Direct3D

.NET Framework[edit]

In , Microsoft released a version of DirectX compatible with the Microsoft .NET Framework, thus allowing programmers to take advantage of DirectX functionality from within .NET applications using compatible languages such as managed C++ or the use of the C# programming language. This API was known as "Managed DirectX" (or MDX for short), and claimed to operate at 98% of performance of the underlying native DirectX APIs. In December , February , April , and August , Microsoft released successive updates to this library, culminating in a beta version called Managed DirectX While Managed DirectX consolidated functionality that had previously been scattered over multiple assemblies into a single assembly, thus simplifying dependencies on it for software developers, development on this version has subsequently been discontinued, and it is no longer supported. The Managed DirectX library expired on October 5,

During the GDC , Microsoft presented the XNA Framework, a new managed version of DirectX (similar but not identical to Managed DirectX) that is intended to assist development of games by making it easier to integrate DirectX, HLSL and other tools in one package. It also supports the execution of managed code on the Xbox The XNA Game Studio Express RTM was made available on December 11, , as a free download for Windows XP. Unlike the DirectX runtime, Managed DirectX, XNA Framework or the Xbox APIs (XInput, XACT etc.) have not shipped as part of Windows. Developers are expected to redistribute the runtime components along with their games or applications.

No Microsoft product including the latest XNA releases provides DirectX 10 support for the .NET Framework.

The other approach for DirectX in managed languages is to use third-party libraries like:

  • SlimDX, an open source library for DirectX programming on the .NET Framework
  • SharpDX,[77][78] which is an open source project delivering the full DirectX API for .NET on all Windows platforms, allowing the development of high performance game, 2D and 3D graphics rendering as well as real-time sound applications
  • www.oxygen.com.ro for the DirectShow subset
  • Windows API CodePack for .NET Framework, which is an open source library from Microsoft.

Alternatives[edit]

There are alternatives to the DirectX family of APIs, with OpenGL, its successor Vulkan, Metal and Mantle having the most features comparable to Direct3D. Examples of other APIs include SDL, Allegro, OpenMAX, OpenML, OpenAL, OpenCL, FMOD, SFML etc. Many of these libraries are cross-platform or have open codebases. There are also alternative implementations that aim to provide the same API, such as the one in Wine. Furthermore, the developers of ReactOS are trying to reimplement DirectX under the name "ReactX".

See also[edit]

References[edit]

  1. ^"Microsoft: The meaning of Xbox - The Economist". The Economist.
  2. ^"DirectX Help". www.oxygen.com.ro.
  3. ^"Where is the DirectX SDK?". www.oxygen.com.ro. Microsoft.
  4. ^Tynan, Dan (May 26, ). "The 25 Worst Tech Products of All Time". PC World. Retrieved September 20,
  5. ^"54 What is DCI?". www.oxygen.com.ro.
  6. ^Craig Eisler's blog post about the frenzy to build DirectX 1 through 5 on www.oxygen.com.ro
  7. ^Jay Barnson (July 13, ). "Tales of the Rampant Coyote". Archived from the original on July 17,
  8. ^"Windows NT Product Overview". Microsoft. October 31, Archived from the original on November 29, Retrieved September 16,
  9. ^J. Allard, PC Pro InterviewArchived at the Wayback Machine, April
  10. ^"Windows Phone 8 adds DirectX, native development, easier app porting". June 20, Retrieved June 23,
  11. ^"Alex St John Interview". March 28, Retrieved August 31,
  12. ^ abDavid Craddock (March ). "Alex St John Interview, page 2". Shack News. Archived from the original on June 1,
  13. ^3D Animation of SPACE FIGHTER by DIRECT ANIMATION[permanent dead link]
  14. ^"DirectX Media Objects". DirectShow. Microsoft Docs. June 5,
  15. ^"DirectX 9: Using the Managed Direct3D Graphics API in .NET". www.oxygen.com.ro. Microsoft.
  16. ^"www.oxygen.com.rocs Namespace". www.oxygen.com.ro. Microsoft.
  17. ^"PIX".
  18. ^www.oxygen.com.ro://www.oxygen.com.ro(VS).aspx
  19. ^"DirectX Frequently Asked Questions". www.oxygen.com.ro. Microsoft.
  20. ^Chuck Walbourn (August ). "Graphics APIs in Windows". MSDN. Retrieved October 3,
  21. ^Albanesius, Chloe (August 29, ). "Microsoft Unleashes First Service Pack for Vista". PC Magazine. Retrieved August 29,
  22. ^"Microsoft Presents DirectX Details at SIGGRAPH". August 7, Retrieved August 27,
  23. ^"Learn Network Inspire"(PDF). AMD. Archived from the original(PDF) on April 10, Retrieved December 30,
  24. ^"DirectX Requires No New GPU". Windows Vista: The Complete Guide. March 5, Archived from the original on October 29, Retrieved March 5,
  25. ^"What's next for DirectX? A DirectX 11 overview — A DirectX 11 overview". Elite Bastards. September 1, Retrieved September 4,
  26. ^"DirectX A look at what's coming". www.oxygen.com.ro September 17,
  27. ^Windows 7 and D3D 11 release dateArchived at the Wayback Machine
  28. ^"MSDN Blogs". www.oxygen.com.ro. Microsoft.
Источник: [www.oxygen.com.ro]
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