Method StartSession

ReviveXR/Session.cpp:144–192

}

ovrResult ovrHmdStruct::StartSession(void* graphicsBinding)
{
	if (Session)
		return ovrError_InvalidOperation;

	XrSessionCreateInfo createInfo = XR_TYPE(SESSION_CREATE_INFO);
	createInfo.next = graphicsBinding;
	createInfo.systemId = System;
	CHK_XR(xrCreateSession(Instance, &createInfo, &Session));
	memset(&SessionStatus, 0, sizeof(SessionStatus));

	// Attach it to the InputManager
	if (Input)
		Input->AttachSession(Session);

	// Create reference spaces
	XrReferenceSpaceCreateInfo spaceInfo = XR_TYPE(REFERENCE_SPACE_CREATE_INFO);
	spaceInfo.poseInReferenceSpace = XR::Posef::Identity();
	spaceInfo.referenceSpaceType = XR_REFERENCE_SPACE_TYPE_VIEW;
	CHK_XR(xrCreateReferenceSpace(Session, &spaceInfo, &ViewSpace));
	spaceInfo.referenceSpaceType = XR_REFERENCE_SPACE_TYPE_LOCAL;
	CHK_XR(xrCreateReferenceSpace(Session, &spaceInfo, &OriginSpaces[ovrTrackingOrigin_EyeLevel]));
	CHK_XR(xrCreateReferenceSpace(Session, &spaceInfo, &TrackingSpaces[ovrTrackingOrigin_EyeLevel]));
	spaceInfo.referenceSpaceType = XR_REFERENCE_SPACE_TYPE_STAGE;
	CHK_XR(xrCreateReferenceSpace(Session, &spaceInfo, &OriginSpaces[ovrTrackingOrigin_FloorLevel]));
	CHK_XR(xrCreateReferenceSpace(Session, &spaceInfo, &TrackingSpaces[ovrTrackingOrigin_FloorLevel]));

	// Update the visibility mask for both eyes
	if (Runtime::Get().VisibilityMask)
	{
		for (uint32_t i = 0; i < ovrEye_Count; i++)
		{
			UpdateStencil((ovrEyeType)i, XR_VISIBILITY_MASK_TYPE_HIDDEN_TRIANGLE_MESH_KHR);
			UpdateStencil((ovrEyeType)i, XR_VISIBILITY_MASK_TYPE_VISIBLE_TRIANGLE_MESH_KHR);
			UpdateStencil((ovrEyeType)i, XR_VISIBILITY_MASK_TYPE_LINE_LOOP_KHR);
		}
	}

	// Enumerate formats
	uint32_t formatCount = 0;
	CHK_XR(xrEnumerateSwapchainFormats(Session, 0, &formatCount, nullptr));
	SupportedFormats.resize(formatCount);
	CHK_XR(xrEnumerateSwapchainFormats(Session, (uint32_t)SupportedFormats.size(), &formatCount, SupportedFormats.data()));
	assert(formatCount == SupportedFormats.size());

	Running.second.notify_all();

	return ovrSuccess;
}

ovrResult ovrHmdStruct::BeginSession()
{