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dim-ghub
ea248b1ecf
vr.mode in config.yaml picks how Nightcap starts: off on the desktop, on in VR, auto in VR only when this user's SteamVR is running and its OpenXR runtime reports a headset. auto never starts SteamVR, and asks its runtime from a short-lived copy of the process so the runtime's libraries do not load before the VR backend arms. vr.enabled still works as on/off, and --vr or --no-vr still override the file for one launch.
36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
#ifndef MOCKTAIL_VR_HEADSET_DETECTION_H_
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#define MOCKTAIL_VR_HEADSET_DETECTION_H_
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#include <chrono>
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#include <string>
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namespace mocktail::vr {
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// Set on the child process that answers DetectSteamVrHeadset. main() checks
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// it first and returns RunHeadsetProbeChild() without starting Roblox.
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inline constexpr const char* kHeadsetProbeEnvironment =
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"MOCKTAIL_VR_HEADSET_PROBE";
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struct HeadsetDetection {
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bool headset = false;
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std::string reason;
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};
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// vr.mode: auto. True only when this user's SteamVR is running and its OpenXR
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// runtime reports a head-mounted display. SteamVR is never started. The
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// runtime is asked from a child process (`self_executable` with
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// kHeadsetProbeEnvironment set) so its libraries never load into this one
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// before the VR backend arms.
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HeadsetDetection DetectSteamVrHeadset(
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const std::string& self_executable,
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std::chrono::milliseconds timeout = std::chrono::seconds(5),
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const std::string& proc_root = "/proc");
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// The child side: probes the OpenXR runtime in XR_RUNTIME_JSON and returns
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// the probe's exit code (0 when a headset is available).
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int RunHeadsetProbeChild();
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} // namespace mocktail::vr
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#endif // MOCKTAIL_VR_HEADSET_DETECTION_H_
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