1# SwiftShader 2 3[](https://opensource.org/licenses/Apache-2.0) [](https://travis-ci.org/google/swiftshader) [](https://ci.appveyor.com/project/c0d1f1ed/swiftshader) 4 5Introduction 6------------ 7 8SwiftShader is a high-performance CPU-based implementation of the OpenGL ES and Direct3D 9 graphics APIs<sup>1</sup><sup>2</sup>. Its goal is to provide hardware independence for advanced 3D graphics. 9 10Building 11-------- 12 13SwiftShader libraries can be built for Windows, Linux, and Mac OS X. 14Android and Chrome (OS) build environments are also supported. 15 16* **Visual Studio** 17 18 On Windows, open the [SwiftShader.sln](SwiftShader.sln) file using [Visual Studio Community](https://visualstudio.microsoft.com/vs/community/) or compatible version, and build the solution. 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. 19 20* **CMake** 21 22 [Install CMake](https://cmake.org/download/) for Linux, Mac OS X, or Windows and use either [the IDE](https://cmake.org/runningcmake/) or run the following terminal commands: 23 24 mkdir build && cd build 25 cmake .. 26 make --jobs=8 27 28 ./unittests 29 ./OGLES2HelloAPI 30 31Usage 32----- 33 34The SwiftShader libraries act as drop-in replacements for graphics drivers. 35 36On 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. 37 38Contributing 39------------ 40 41See [CONTRIBUTING.txt](CONTRIBUTING.txt) for important contributing requirements. 42 43The canonical repository for SwiftShader is hosted at: 44https://swiftshader.googlesource.com/SwiftShader 45 46All changes must be reviewed and approved in the [Gerrit](https://www.gerritcodereview.com/) review tool at: 47https://swiftshader-review.googlesource.com 48 49Authenticate your account here: 50https://swiftshader-review.googlesource.com/new-password 51 52All changes require a [Change-ID](https://gerrit-review.googlesource.com/Documentation/user-changeid.html) tag in the commit message. A commit hook may be used to add this tag automatically, and can be found at: 53https://gerrit-review.googlesource.com/tools/hooks/commit-msg. To clone the repository and install the commit hook in one go: 54 55 git clone https://swiftshader.googlesource.com/SwiftShader && (cd SwiftShader && curl -Lo `git rev-parse --git-dir`/hooks/commit-msg https://gerrit-review.googlesource.com/tools/hooks/commit-msg ; chmod +x `git rev-parse --git-dir`/hooks/commit-msg) 56 57Changes are uploaded to Gerrit by executing: 58 59 git push origin HEAD:refs/for/master 60 61Testing 62------- 63 64SwiftShader's OpenGL ES implementation can be tested using the [dEQP](https://source.android.com/devices/graphics/testing) test suite. 65 66See [docs/dEQP.md](docs/dEQP.md) for details. 67 68Third-Party Dependencies 69------------------------ 70 71The [third_party](third_party/) directory contains projects which originated outside of SwiftShader: 72 73[LLVM](third_party/LLVM/) contains an outdated and diverged copy of the [LLVM](http://llvm.org/) compiler framework. Until further notice, maintenance fixes can be made directly in the SwiftShader repository. 74 75[subzero](third_party/subzero/) contains a fork of the [Subzero](https://chromium.googlesource.com/native_client/pnacl-subzero/) project. It is part of Google Chrome's (Portable) [Native Client](https://developer.chrome.com/native-client) project. Its authoritative source is at [https://chromium.googlesource.com/native_client/pnacl-subzero/](https://chromium.googlesource.com/native_client/pnacl-subzero/). The fork was made using [git-subtree](https://github.com/git/git/blob/master/contrib/subtree/git-subtree.txt) 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](third_party/subzero/docs/README.rst) instructions, reviewed at [https://chromium-review.googlesource.com](https://chromium-review.googlesource.com/q/project:native_client%252Fpnacl-subzero), and then pulled into the SwiftShader repository. 76 77[llvm-subzero](third_party/llvm-subzero/) contains a minimized set of LLVM dependencies of the Subzero project. 78 79[PowerVR_SDK](third_party/PowerVR_SDK/) contains a subset of the [PowerVR Graphics Native SDK](https://github.com/powervr-graphics/Native_SDK) for running several sample applications. 80 81[googletest](third_party/googletest/) contains the [Google Test](https://github.com/google/googletest) 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. 82 83Documentation 84------------- 85 86See [docs/Index.md](docs/Index.md). 87 88Contact 89------- 90 91Public mailing list: [swiftshader@googlegroups.com](https://groups.google.com/forum/#!forum/swiftshader) 92 93General bug tracker: https://g.co/swiftshaderbugs 94Chrome specific bugs: https://bugs.chromium.org/p/swiftshader 95 96License 97------- 98 99The SwiftShader project is licensed under the Apache License Version 2.0. You can find a copy of it in [LICENSE.txt](LICENSE.txt). 100 101Files in the third_party folder are subject to their respective license. 102 103Authors and Contributors 104------------------------ 105 106The legal authors for copyright purposes are listed in [AUTHORS.txt](AUTHORS.txt). 107 108[CONTRIBUTORS.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](https://cla.developers.google.com/clas) and have contributed more than a formatting change, feel free to request to be added. 109 110Disclaimer 111---------- 112 1131. Trademarks are the property of their respective owners. 1142. We do not claim official conformance with any graphics APIs at this moment. 1153. This is not an official Google product. 116
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