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Vulkan is a low-overhead, cross-platform 3D graphics and compute API. Like OpenGL, Vulkan targets high-performance realtime 3D graphics applications such as video games and interactive media across all platforms, and can offer higher performance and more balanced CPU/GPU usage, much like Direct3D 12 and Mantle. Other major differences from Direct3D (prior to version 12) and OpenGL are Vulkan being a considerably lower level API and offering parallel tasking. Vulkan also has the ability to render 2D graphics applications,[11] however it is generally suited for 3D. In addition to its lower CPU usage, Vulkan is also able to better distribute work amongst multiple CPU cores.[12]

Vulkan
Vulkan API logo.svg
Developer(s) Khronos Group, developed from AMD's Mantle[1][2][3][4][5]
Initial release 16 February 2016; 14 months ago (2016-02-16)[6]
Stable release 1.0.49 (12 May 2017; 10 days ago (2017-05-12)[7]) [±]
Operating system Android, Linux, Tizen, Microsoft Windows[8][9]
Platform Cross-platform
Type 3D graphics and compute API[10]
Website www.khronos.org/vulkan

Vulkan was first announced by the Khronos Group at GDC 2015.[10][13][14] The Vulkan API was initially referred to as the "next generation OpenGL initiative," or "OpenGL next"[15] by Khronos, but use of those names was discontinued once the Vulkan name was announced.[16] Vulkan is derived from and built upon components of AMD's Mantle API, which was donated by AMD to Khronos with the intent of giving Khronos a foundation on which to begin developing a low-level API that they could standardize across the industry, much like OpenGL.[3][10][17][18][19][20][21]

Contents

FeaturesEdit

 
OpenGL and Vulkan are both rendering APIs, in both cases the GPU executes shaders while the CPU executes everything else.

Vulkan is intended to provide a variety of advantages over other APIs as well as its spiritual predecessor, OpenGL. Vulkan offers lower overhead, more direct control over the GPU, and lower CPU usage.[14] The overall concept and feature set of Vulkan is similar to Direct3D 12 and Mantle.

Intended advantages of Vulkan over previous-generation APIs include:

  • Vulkan API is well suited for high-end graphics cards as well as for graphics hardware on mobile devices (OpenGL has a specific subset for mobile devices called OpenGL ES; it's still an alternative API in Vulkan supporting devices).
  • In contrast to Direct3D 12, Vulkan is available on multiple modern operating systems; like OpenGL, the Vulkan API is not locked to a single OS or device form factor. As of release, Vulkan runs on Windows 7, Windows 8, Windows 10, Tizen, Linux, and Android (third party support for iOS and macOS[22] is also available)
  • Reduced driver overhead, reducing CPU workloads.[23]
  • Reduced load on CPUs through the use of batching, leaving the CPU free to do more computation or rendering than otherwise.[24]
  • Better scaling on multi-core CPUs. Direct3D 11 and OpenGL 4 were initially designed for use with single-core CPUs and only received augmentation to be executed on multi-cores. Even when application developers use the augmentations, the API regularly does not scale well on multi-cores.[25]
  • OpenGL uses the high-level language GLSL for writing shaders which forces each OpenGL driver to implement its own compiler for GLSL that executes at application runtime to translate the program's shaders into the GPU's machine code. Vulkan drivers are supposed to ingest instead shaders already translated into an intermediate binary format called SPIR-V (Standard Portable Intermediate Representation), analogous to the binary format that HLSL shaders are compiled into in Direct3D. By allowing shader pre-compilation, application initialization speed is improved and a larger variety of shaders can be used per scene. A Vulkan driver only needs to do GPU specific optimization and code generation, resulting in easier driver maintenance, and eventually smaller driver packages (currently GPU vendors still have to include OpenGL/CL).[26]
  • Unified management of compute kernels and graphical shaders, eliminating the need to use a separate compute API in conjunction with a graphics API.
OpenGL Vulkan[27]
One single global state machine Object-based with no global state
State is tied to a single context All state concepts are localized to a command buffer
Operations can only be executed sequentially Multi-threaded programming is possible
GPU memory and synchronization are usually hidden Explicit control over memory management and synchronization
Extensive error checking Vulkan drivers do no error checking at runtime;
there is a validation layer for developers

NVIDIA notes that OpenGL is still a great option for a lot of use-cases, as it does come at a much lower complexity and maintenance burden than Vulkan, while in many cases still providing great overall performance.[28]

Planned featuresEdit

At SIGGRAPH 2016, Khronos announced that Vulkan would be getting support for automatic multi-GPU features, similar to what is offered by Direct3D 12.[29] Multi-GPU support included in-API removes the need for SLI or Crossfire which requires graphics cards to be of the same model. API multi-GPU instead allows the API to intelligently split the workload among two or more completely different GPUs.[30] For example, integrated GPUs included on the CPU can be used in conjunction with a high-end dedicated GPU for a slight performance boost.

When releasing OpenCL version 2.2 the Khronos Group announced that OpenCL would be merging into Vulkan in the future.[31]

HistoryEdit

The Khronos Group began a project to create a next generation graphics API in July 2014 with a kickoff meeting at Valve Corporation.[32] At SIGGRAPH 2014, the project was publicly announced with a call for participants.[10]

According to the US Patent and Trademark Office, the trademark for Vulkan was filed on February 19, 2015.[33]

Vulkan was formally named and announced at Game Developers Conference 2015, although speculation and rumors centered around a new API existed beforehand and referred to it as "glNext".[34]

2015Edit

In early 2015, LunarG (funded by Valve) developed and showcased a Linux driver for Intel which enabled Vulkan compatibility on the HD 4000 series integrated graphics, despite the open source Mesa drivers not being fully compatible with OpenGL 4.0 until later that year.[35][36] There is still the possibility[37] of Sandy Bridge support, since it supports compute through Direct3D11.

On August 10, 2015, Google announced that future versions of Android would support Vulkan.[38] Android Nougat launched support for Vulkan on August 22, 2016.

On December 18, 2015, the Khronos Group announced that the 1.0 version of the Vulkan specification was nearly complete and would be released when conforming drivers were available.[14] The specification and the open-source Vulkan SDK were released on February 16, 2016.[6]

2016Edit

In December of 2016, Unity Technologies announced that version 5.6 of their game engine, Unity, would support the Vulkan API.[39]

2017Edit

In February of 2017, Croteam announced that it would be adopting the Vulkan API in its games and leveraging it to make their games more cross-platform friendly.[40] In March of 2017, Cloud Imperium Games announced Star Citizen would be using Vulkan API instead of DirectX.[41]

Software that supports VulkanEdit

Video gamesEdit

  • The Talos Principle – The first game with Vulkan rendering support.[42]
  • Dota 2 – Vulkan support released in May 2016.[43]
  • Doom – Vulkan support released in July 2016.[44]
  • vkQuake – A Vulkan Quake port was released in July 2016.[45][46]
  • Roblox – As of March 2017, Roblox now has support for Vulkan.
  • Star Citizen – As of March 2017, the Director of Graphics Programming for Cloud Imperium Games, Alistair Brown, has announced on the official Star Citizen forums that Cloud Imperium will now only focus on implementing Vulkan into Star Citizen and Squadron 42. Support for DirectX 12 will be dropped as it would require customers to use Windows 10.[47]
  • Mad Max – Beta Vulkan support exclusively for Linux port released in March 2017.[48]
  • Ballistic Overkill - Vulkan support released in may 2017.
  • Counter-Strike: Global Offensive - Vulkan support will be available in summer of 2017.

Game console emulatorsEdit

Game enginesEdit

  • Source 2 – In March 2015, Valve Corporation announced the Source 2 engine, the successor engine to the original Source engine, would support Vulkan.[52][53]
  • Serious Engine 4 – In February 2016, Croteam announced that they were supporting Vulkan in their Serious Engine.[54]
  • Unreal Engine 4 – In February 2016, Epic Games announced Unreal Engine 4 support for Vulkan at Samsung's Galaxy S7 Unpacked event.[55][56]
  • id Tech 6 – In May 2016, id Software announced Doom, running the id Tech 6 engine, would support Vulkan.[57]
  • CryEngineCrytek has plans to include Vulkan support in CryEngine.[58]
  • Unity – The engine currently supports Vulkan in version 5.6.
  • Xenko – Vulkan support was added in July 2016.[59]
  • Intrinsic – A free Vulkan based cross-platform game engine published on GitHub.[60]
  • Torque 3D – In April 2016, the developers community announced they will include Vulkan support.[61][62]

Development toolsEdit

OS componentsEdit

The Vulkan Window System Interface (WSI) does for Vulkan what EGL does for OpenGL ES.[66] EGL is used by OpenGL ES programs to interface with the native platform windowing system. EGL handles context management, surface binding and rendering synchronization.

CompatibilityEdit

Initial specifications stated that Vulkan will work on hardware that currently supports OpenGL ES 3.1 or OpenGL 4.x and up.[67] As Vulkan support requires new graphics drivers, this does not necessarily imply that every existing device that supports OpenGL ES 3.1 or OpenGL 4.x will have Vulkan drivers available.

Android 7.0 Nougat supports Vulkan.[68] The software was released in August 2016.[69]

Vulkan support for iOS and macOS has not been announced by Apple, but at least one company provides a Vulkan implementation that runs on top of Metal on iOS and macOS devices.[22]

Company Hardware Software support: Vulkan 1.0
Microarchitecture Available since GPUs (chips) Graphic cards / SoCs Linux Microsoft Windows[a] Android Nougat and later[70]
AMD
GCN 5th TBA Vega 10 Radeon Rx Vega series AMDGPU PRO (Ubuntu & RHEL)[71][72]
& RADV in Mesa[73]
Radeon Software[74] N/A
GCN 4th June 2016 Polaris 10, Polaris 11, Polaris 12 Radeon Rx 400 series
GCN 3rd August 2014 Tonga, Fiji, Carrizo Radeon R9 Series
GCN 2nd March 2013 Bonaire, Hawaii, Kaveri, Kabini, Temash, Mullins, Beema, Carrizo-L Radeon HD 7790, PlayStation 4, Xbox One Experimental
GCN 1st February 2012 Oland, Cape Verde, Pitcairn, Tahiti Radeon HD 77xx–7900 Series
TeraScale 3 December 2010 Cayman, Trinity/Richland Radeon HD 69xx Series, Radeon HD 7xxx–76xx Series not supported
TeraScale 2 September 2009 Cedar, Cypress, Juniper, Redwood, Palm, Sumo Radeon HD 5000 Series, Radeon HD 6350, Radeon HD 64xx–68xx Series
TeraScale 1 May 2007 R600, RV630, RV610, RV790, RV770, … Radeon HD 2000 Series, HD 3000, HD 4000
Nvidia
Pascal May 2016 GP10x GeForce 10 series, Tegra X2 Nvidia GeForce driver[75][76] Nvidia GeForce driver[76] Yes
Maxwell February 2014 GM10x, GM20x GeForce GTX 750 Ti, GTX 750, GTX 860M, GeForce 900 series, Tegra X1
Kepler March 2012 GK10x, GK110, GK208 GeForce 600 series, GeForce 700 series, Tegra K1
Fermi March 2010 GF10x, GF11x GeForce 400 series, GeForce 500 series not supported
Tesla November 2006 G8x, G9x, GT20x, GT21x GeForce 8 series, GeForce 9 series, GeForce 100 series, GeForce 200 series, GeForce 300 series
Intel
Kaby Lake January 3, 2017 Core i3-/i5-/i7-7000, Pentium xyz, Celeron xyz Anvil in Mesa[77][78] Intel Graphics driver[79] Anvil in Mesa 17.1[80]
Skylake August 2015 Core i3-/i5-/i7-6000, Core m3-/m5-/m7-6Yxx, Pentium G4xxx, Celeron G39xx
Broadwell September 2014 Core i3-/i5-/i7-5000, Core M-5Yxx not supported
Haswell September 2012 Core i3-/i5-/i7-4000, Pentium G3xxx, Celeron G18xx
Ivy Bridge April 2012 Core i3-/i5-/i7-3000, Pentium G2xxx, Celeron G16xx
Sandy Bridge January 2011 Core i3-/i5-/i7-2000, Pentium Gxxx, Celeron Gxxx not supported not supported
Westmere January 2010 Core i3-/i5-/i7-xxx, Pentium G69xx, Celeron G1101
Imagination Technologies
PowerVR Series 8 February 2016 GE8200, GE8300 PowerVR Graphics SDK v4.1[81]
PowerVR Series 7 November 2014 GE7400, GE7800, GT7200, GT7400, GT7600, GT7800, GT7900 Apple A9, A9X, A10 Fusion, Helio X30 (MT679?)
PowerVR Series 6 January 2012 G6100, G6200, G6230, G6400, G6430, G6630, RK3368, G6050, G6060, G6100 (XE), G6110, GX6240, GX6250, GX6450, GX6650 Apple A7, A8, A8X, MediaTek MT8173, MT8176, MediaTek MT6595M, MT6595T, MT6595M, MT6795, MT8135, Helio X10 (MT6795), LG H13, Atom Z3460, Z3480, Z3530, Z3560, Z3570, Z3580
PowerVR Series 5 January 2009 SGX543, SGX544, SGX554 Apple S1, A5, A5X, A6, A6X, NovaThor L8540, L8580, L9540, TI OMAP 4470, 5430, 5432, MediaTek MT5327, MT6589M, MT6589T, MT6589, MT8117, MT8121, MT8125, MT8389, Atom Z2460, Z2520, Z2560, Z2580, Z2760, Exynos 5410 not supported
Qualcomm
Adreno 500 series Adreno 510, Adreno 530 Snapdragon 430, 625, 650, 652, 820, 821 1.0[82]
Adreno 400 series Snapdragon 415, 615, 616, 617, 805, 808, 810 planned to be supported[83]
Adreno 300 series Snapdragon 200, 208, 210, 212, 400, 410, 412, 600, 800, 801 not supported
ARM
Bifrost[84] June 2016 Mali-G71, … Kirin 960 1.0[85]
Midgard 4th Q4 2015 Mali-T860, Mali-T830, Mali-T880 Exynos 8890, Exynos 7870, Kirin 950, 955, MediaTek MT6738, MT6750, Helio X20 (MT6797), X25 (MT6797T), P10 (MT6755), P20 (MT6757)
Midgard 3rd October 2013 Mali-T760, … Exynos 7420, Exynos 5433, MT6752, MT6732, RK3288
Midgard 2nd August 2012 Mali-T600 series, T720 Exynos 5250, 5260, 5410, 5420, 5422, 5430, 5800, 7580, Mediatek MT6735, MT6753, Kirin 920, 925, 930, 935 not supported

See alsoEdit

  • Direct3D – main competitor of Vulkan
  • OpenGL – another graphics API by the Khronos Group
  • OpenCL – a heterogeneous computing framework by the Khronos Group
  • Mantle – a low-level graphics and compute API from AMD, the foundation of Vulkan
  • Metal – a low-level graphics and compute API for iOS and macOS
  • AMDGPU – AMD's fully open-source unified graphics driver for Linux

NotesEdit

  1. ^ Drivers so far have supported Windows 7 and later.

ReferencesEdit

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External linksEdit