This is a thin wrapper over the Win32 APIs for graphics on Windows to make it easier to write Windows applications in Swift.
This requires the latest (git) version of Swift (alternatively, you can use the nightlies from https://dev.azure.com/compnerd/windows-swift). Additionally, you need the latest (git) version of CMake (from http://github.com/KitWare/cmake) and you need the new language support from https://github.com/compnerd/cmake-swift.
Assuming you are building in
S:, you can build with:
cmake -G Ninja -DCMAKE_MODULE_PATH=S:/cmake-swift/Modules S:/swift-win32 ninja SwiftWin32 ninja HelloSwift .\HelloSwift