opencomposite

GameNative's build of OpenComposite for OpenVR games running under Wine on Quest.

Every release is built by GitHub Actions on a Windows runner from the upstream commit in UPSTREAM_COMMIT with the patches in patches/ applied. The GameNative app downloads opencomposite_x64.dll from a pinned release and verifies its SHA-256, so the shipped binary always traces back to a CI run.

Patches

• background-support.patch: on Windows, VR_Init with VRApplication_Background returns VRInitError_Init_NoServerForBackgroundApp instead of aborting. GameNative embeds OpenComposite in each Wine process and has no shared vrserver, so helper processes that use the background app type must not open a competing OpenXR session. Also adds the <chrono> include current MSVC needs to compile XrHMD.cpp.

Releasing

1. Change UPSTREAM_COMMIT or patches/ as needed and merge to main. Every push builds and uploads the DLL as a workflow artifact.
2. Tag the commit: git tag v1 && git push origin v1. The workflow builds again and publishes a GitHub release with the DLL and its .sha256.
3. Point the GameNative staging scripts at the release URL and update the pinned hash.

Building locally

Needs Windows, Visual Studio 2022 with the C++ workload, CMake, Git, and the Vulkan SDK.

.\build.ps1 -VulkanSdk C:\VulkanSDK\1.3.296.0

Output lands in build\out\. MSVC builds are not bit-for-bit reproducible across machines, so a local hash will not match the release hash. Ship the release one.

License

OpenComposite is GPL-3.0. The binaries in releases are built from the pinned upstream commit plus the patches in this repository, which together are the corresponding source.