Blender Git Loki

Merge branch 'master' into soc-2019-openxr

Cleanup: Use CamelCase for XR functions/types

Also silence warnings.

Finish OpenXR GLX binding initialization

Monado now opens a window here when asking it to start a session. That
seems to be the case because it doesn't detect the HMD as direct mode
capable yet. But that shouldn't be an issue from our side.

Fix invalid delete operator use

Again a thing MSVC should warn about but didn't...

Use friend class to access graphics data on Windows too

Also fix memory leak.

Pass graphics context data to OpenXR graphics bindings on Linux too

Refactors function into a class, and make this class a friend of
GHOST_ContextGLX. That seems like a better way to access low level
graphics data for this specific case, rather than giving anyone access
via a getter.

Init OpenXR graphics bindings with valid graphics context (Win only)

Will do this for Linux in a separate commit.

Also fixes a stupid mistake from previous commit on lazy-creation of XR
context.

Remove CTX_wm_xr_context

Not really useful, plus XR-Context is now GHOST data.

Rename of XR types (WM -> GHOST)

Lazy-create XR-context

Creating the context causes the OpenXR loader to try connect to a
runtime. That would involve reading the OS'es active_runtime.json and
dynamic linking based on that. So better avoid doing this on startup.
Also: don't pay for what you don't use!

Rename wm_xr_ -> GHOST_XR

Merge branch 'soc-2019-openxr' into temp-ghost_openxr

Merge branch 'master' into soc-2019-openxr

Use some C++ features where useful

Also correct include guards.

Initially move XR files to GHOST and compile in C++

Merge branch 'master' into soc-2019-openxr

Fail without crashing if no runtime is found

For now simply do nothing. Plan is to work on proper error handling and
reporting later.

Fix compile errors and warnings on certain configs

Addresses:
* Compile error on Linux
* Compile error with WITH_OPENXR disabled
* Unused parameter warnings

Fix missing return value... how did this work even?

Looking at the code this should've failed miserably. No idea how this
could still work fine... Maybe return vars used same stack location?

Merge branch 'master' into soc-2019-openxr