Roll SPIRV-Headers and SPIRV-Tools

Squashed 'third_party/SPIRV-Headers/' changes from 7845730ca..104ecc356

104ecc356 Merge pull request #180 from dneto0/issue-179
93effe164 MeshShadingNV enables builtins PrimitiveId, Layer, and ViewportIndex
4de110ce1 Merge pull request #182 from dgkoch/khr_rt_final
632375607 de-alias/reassign OpIgnoreIntersectionKHR/OpTerminateRayKHR
928a192ee Raytracing and Rayquery updates for final
eb5e40912 Updated headers for new trace/executeCallable and acceleration structure cast.
5ab5c9619 Reserve additional loop control bit for Intel extension (NoFusionINTEL) (#175)
793f9199b Add EmbarkStudios/rust-gpu to vendor list. (#174)

git-subtree-dir: third_party/SPIRV-Headers
git-subtree-split: 104ecc356c1bea4476320faca64440cd1df655a3

Squashed 'third_party/SPIRV-Tools/' changes from a61d07a72..b0e22d28f

b0e22d28f spirv-fuzz: Fix facts arising from CompositeConstruct (#4034)
5ffa320fe spirv-fuzz: Do not flatten conditionals that create synonyms (#4030)
cd590fa33 Update MeshShadingNV dependencies (and land Ray tracing updates) (#4028)
671914c28 Fix buffer oob instrumentation for matrix refs (#4025)
1f2fcddd3 spirv-opt: Set parent when adding basic block (#4021)
f686518ce spirv-opt: properly preserve DebugValue indexes operand (#4022)
1cda49527 Use less stack space when validating Vulkan builtins (#4019)

git-subtree-dir: third_party/SPIRV-Tools
git-subtree-split: b0e22d28f5ec891d6b256703575d08fce4228bd9

BUG: b/174239232

Change-Id: I1973df95f38ce8d77d344dd43afa707588ab6dde
Reviewed-by: Nicolas Capens <>
Tested-by: Ryan Harrison <>
58 files changed
tree: 23eef2418d517a9d603e598c235318ef712c7256
  1. .clang-format
  2. .dir-locals.el
  3. .gitignore
  4. .gitmodules
  5. .vscode/
  6. AUTHORS.txt
  7. Android.bp
  9. CMakeLists.txt
  10. CMakeSettings.json
  13. LICENSE.txt
  14. OWNERS
  16. build/
  17. build_overrides/
  18. codereview.settings
  19. docs/
  20. extensions/
  21. include/
  22. src/
  23. tests/
  24. third_party/
  25. tools/




SwiftShader is a high-performance CPU-based implementation of the Vulkan graphics APIs12. Its goal is to provide hardware independence for advanced 3D graphics.

NOTE: SwiftShader's OpenGL ES frontend is no longer supported, and will eventually be removed. Read more about our recommendation to use ANGLE on top of SwiftShader Vulkan here.


SwiftShader libraries can be built for Windows, Linux, and Mac OS X.
Android and Chrome (OS) build environments are also supported.

  • CMake
    Install CMake for Linux, Mac OS X, or Windows and use either the GUI or run the following terminal commands:

    cd build
    cmake ..
    cmake --build . --parallel
  • Visual Studio
    To build the Vulkan ICD library, use Visual Studio 2019 to open the project folder and wait for it to run CMake. Open the CMake Targets View in the Solution Explorer and select the vk_swiftshader project to build it.


The SwiftShader libraries act as drop-in replacements for graphics drivers.

On Windows, most applications can be made to use SwiftShader's DLLs by placing them in the same folder as the executable. On Linux, the LD_LIBRARY_PATH environment variable or -rpath linker option can be used to direct applications to search for shared libraries in the indicated directory first.

In general, Vulkan applications look for a shared library named vulkan-1.dll on Windows ( on Linux). This ‘loader’ library then redirects API calls to the actual Installable Client Driver (ICD). SwiftShader's ICD is named libvk_swiftshader.dll, but it can be renamed to vulkan-1.dll to be loaded directly by the application. Alternatively, you can set the VK_ICD_FILENAMES environment variable to the path to vk_swiftshader_icd.json file that is generated under the build directory (e.g. .\SwiftShader\build\Windows\vk_swiftshader_icd.json). To learn more about how Vulkan loading works, read the official documentation here.


See CONTRIBUTING.txt for important contributing requirements.

The canonical repository for SwiftShader is hosted at:

All changes must be reviewed and approved in the Gerrit review tool at:

Authenticate your account here:

All changes require a Change-ID tag in the commit message. A commit hook may be used to add this tag automatically, and can be found at: To clone the repository and install the commit hook in one go:

git clone && (cd SwiftShader && curl -Lo `git rev-parse --git-dir`/hooks/commit-msg ; chmod +x `git rev-parse --git-dir`/hooks/commit-msg)

Changes are uploaded to Gerrit by executing:

git push origin HEAD:refs/for/master

When ready, add a project owner as a reviewer on your change.

Some tests will automatically be run against the change. Notably, verifies the change has been formatted using clang-format 10.0. Most IDEs come with clang-format support, but may require downgrading to clang-format version 10.0.


SwiftShader's OpenGL ES implementation can be tested using the dEQP test suite.

See docs/ for details.

Third-Party Dependencies

The third_party directory contains projects which originated outside of SwiftShader:

subzero contains a fork of the Subzero project. It is part of Google Chrome‘s (Portable) Native Client project. Its authoritative source is at The fork was made using git-subtree to include all of Subzero’s history, and until further notice it should not diverge from the upstream project. Contributions must be tested using the README instructions, reviewed at, and then pulled into the SwiftShader repository.

llvm-subzero contains a minimized set of LLVM dependencies of the Subzero project.

PowerVR_SDK contains a subset of the PowerVR Graphics Native SDK for running several sample applications.

googletest contains the Google Test project, as a Git submodule. It is used for running unit tests for Chromium, and Reactor unit tests. Run git submodule update --init to obtain/update the code. Any contributions should be made upstream.


See docs/


Public mailing list:

General bug tracker:
Chrome specific bugs:


The SwiftShader project is licensed under the Apache License Version 2.0. You can find a copy of it in LICENSE.txt.

Files in the third_party folder are subject to their respective license.

Authors and Contributors

The legal authors for copyright purposes are listed in AUTHORS.txt.

CONTRIBUTORS.txt contains a list of names of individuals who have contributed to SwiftShader. If you‘re not on the list, but you’ve signed the Google CLA and have contributed more than a formatting change, feel free to request to be added.


  1. Trademarks are the property of their respective owners.
  2. This is not an official Google product.