This extension introduces a more robust way of creating an XrSession for
OpenGL. It also lays the groundwork for future OpenGL ES support.
https://github.com/KhronosGroup/OpenXR-Docs/pull/40
Signed-off-by: Simon Ser <contact@emersion.fr>
Signed-off-by: Drew DeVault <sir@cmpwn.com>
This simplifies the Wayland backend, fixes the build configuration for
it, ports it to xdg-shell stable, and reworks some false assumptions
from the original port.
fixes 6e396ed
It was unnecessary to move the wait to xrEndFrame.
It does not matter if the compositor renders the frame immediately because the
frame physically can not be displayed before the next HMD refresh.
On the other hand, leaving too short of a time for the compositor to render
may delay the frame past its predicted time.
xrWaitFrame() doesn't block at all, will only predict the time for the next frame.
Once the compositor is multithreaded, this wait should be moved to the compositor thread
and xrWaitFrame should be the function to block until the compositor finished rendering the frame.
```txt
Conditional jump or move depends on uninitialised value(s)
at 0x6A5A7A0: vk_select_physical_device (comp_vk.c:847)
by 0x6A5AAF9: vk_create_device (comp_vk.c:916)
by 0x6A5CD82: compositor_check_vulkan_caps (comp_compositor.c:401)
by 0x6A5D659: comp_compositor_create (comp_compositor.c:656)
by 0x6A5F99B: xrt_gfx_vk_provider_create (comp_glue_vk.c:57)
by 0x6A78197: oxr_session_populate_vk (oxr_session_vk.c:32)
by 0x6A77E59: oxr_session_create_impl (oxr_session.c:536)
by 0x6A77F53: oxr_session_create (oxr_session.c:567)
by 0x6A6EA74: oxr_xrCreateSession (oxr_api_session.c:44)
by 0x2632A8: xrCreateSession (in hello_xr)
by 0x239F0D: (anonymous namespace)::OpenXrProgram::InitializeSession() (in hello_xr)
by 0x22ED25: main (in hello_xr)
Uninitialised value was created by a stack allocation
at 0x6A5CB05: compositor_check_vulkan_caps (comp_compositor.c:349)
```
This patch has been spun of the rather massive amount of work for adding input
devices into Monado. The interfaces feels somewhat stable now so could do
with another pair of eyes on them, before too much work is done on st/oxr.
