Missing documentation on vulkan driver interface

[xytovl]

In headers/openvr_driver.h, the vr::VRDriverDirectModeComponent::CreateSwapTextureSet method does not specify what the vr::SharedTextureHandle_t is meant to represent.

The same comment applies for the vr::VRDriverDirectModeComponent::syncTexture parameter of Present

Some sample code for Linux/vulkan would be very helpful.

[okawo80085]

Me and many others would love to have that documentation too, however it's been way over a year since the lack of said documentation was noticed and there is still nothing, best bet right now is trial and error until valve, or someone else, provides a working example of the VRDriverDirectModeComponent implemented in vulkan, and considering that other OSS SteamVR driver projects almost never focus on Linux, let alone VRDriverDirectModeComponent in vulkan, I'd say we're not getting it any time soon :\