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SwiftShader is a high-performance CPU-based implementation of the Vulkan, OpenGL ES, and Direct3D 9 graphics APIs. Its goal is to provide hardware independence for advanced 3D graphics.
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.vscode .vscode: Add cppdap to includePath Dec 11, 2019
build Remove Vulkan project from Visual Studio solution Oct 4, 2019
build_overrides Support Windows builds and ANGLE integration. Aug 30, 2019
docs Update link to dEQP repository Sep 11, 2019
extensions Support RGB formats with IOSurface client buffer surfaces. Aug 21, 2019
include Vulkan header update Nov 21, 2019
src Use allocateExecutable() in LLVMReactor Dec 12, 2019
tests Regres: Fix debug macro detection Dec 11, 2019
third_party Subzero: fix alloca return address allocation Dec 9, 2019
.dir-locals.el Configure emacs for proper SwiftShader indentation. Apr 10, 2015
.gitignore Output Swiftshader version to logcat Nov 11, 2019
.gitmodules Add as a third_party dependency Dec 9, 2019
.travis.yml Rename 'unittests' to 'gles-unittest' Apr 8, 2019
AUTHORS.txt Add authors and contributors files. May 11, 2016
Android.bp Jettison android subzero support entirely Aug 15, 2019 Revert "Suppress 32-bit MSVC warning." Nov 12, 2019
CMakeLists.txt CMakeLists: Fix logic of BUILD_CPPDAP Dec 10, 2019
CMakeSettings.json Add Visual Studio CMakeSettings.json file Aug 13, 2019
CONTRIBUTING.txt Improve documentation. Jul 3, 2016
LICENSE.txt Apply the Apache 2.0 license. May 11, 2016
OWNERS Grant more downstream SwiftShader approval rights. Oct 10, 2018 Remove Vulkan project from Visual Studio solution Oct 4, 2019
SwiftShader.sln Remove Vulkan project from Visual Studio solution Oct 4, 2019


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SwiftShader is a high-performance CPU-based implementation of the Vulkan, OpenGL ES, and Direct3D 9 graphics APIs12. Its goal is to provide hardware independence for advanced 3D graphics.


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

  • Visual Studio
    For building 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.

    There is also a legacy SwiftShader.sln file for Visual Studio 2017 for building OpenGL ES and Direct3D libraries. Output DLLs will be placed in the out subfolder. Sample executables such as OGLES3ColourGrading can be found under the Tests solution folder and can be run from the IDE.

  • CMake

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

    cd build
    cmake ..
    make --jobs=8


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.


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


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. We do not claim official conformance with the Direct3D and OpenGL graphics APIs at this moment.
  3. This is not an official Google product.
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