Vulkan: Offscreen SwapChain Support?

[ChengysTHU]

On Linux platform, the engine supports OpenGL and Vulkan backends. Initialization of GL context on Linux is tightly coupled with window creation. As a result, Diligent Engine does not initialize the context, but attaches to the one initialized by the app. An example of the engine initialization on Linux can be found in Tutorial00_HelloLinux.cpp.

Is it possible for the Vulkan backend on the Linux platform to have a similar approach, interfacing with special toolchains of certain platforms through off-screen rendering, rather than relying on XCB windows?

[hzqst]

https://github.com/DiligentGraphics/DiligentCore/blob/master/Graphics/GraphicsTools/src/OffScreenSwapChain.cpp