#include <Headset.h>

Collaboration diagram for EngineCore::Headset:

Classes
struct	Eye
struct	ImageBuffer
struct	WaitFrameResult
	Result from waitForXrFrame indicating what the main loop should do. More...

Public Types
enum class	BeginFrameResult { Error , RenderFully , SkipRender , SkipFully , ComputeOnly }

Public Member Functions
	Headset (const ApplicationContext *context=nullptr)
	~Headset ()
void	cleanup ()
void	updateViewMatrix ()
	Updates the eye matrix for the headset.
WaitFrameResult	waitForXrFrame (Renderer *renderer)
	First part of frame setup: calls xrWaitFrame. Can be called before previous xrEndFrame completes. Polls events and waits for the next frame to be ready.
BeginFrameResult	beginXrFrameAfterWait (uint32_t &swapchainImageIndex)
	Second part of frame setup: calls xrBeginFrame, acquires swapchain image. MUST be called after previous frame's xrEndFrame has completed.
BeginFrameResult	beginXrFrame (uint32_t &swapchainImageIndex, Renderer *renderer)
	Legacy function that combines waitForXrFrame and beginXrFrameAfterWait. Kept for compatibility but prefer using the split functions for better pipelining.
void	endXrFrame ()
void	endXrFrameNoRender ()
void	beginXrSession () const
VkImage	getSwapchainImage (size_t swapchainImageIndex) const
	Gets the swapchain image for the given index.
std::vector< RenderTarget >	getSwapchainRenderTargets ()
void	endXrSession () const
	ends the xr session and thus terminating the xr window on the headset
void	requestExitSession ()
	Requests the XR runtime to exit the session gracefully. This should be called when the application wants to shut down (e.g., window close). The XR runtime will transition through proper states before exiting.
uint32_t	getEyeCount () const
	Gets eye count.
VkExtent2D	getEyeResolution (size_t eyeIndex) const
	Gets eye resolution in x and y for a specified eye index. 0 is left.
VkRenderPass	getRenderPass () const
	Gets render pass.
glm::mat4	getEyeViewMatrix (size_t eyeIndex) const
	Returns the view matrix of the specified eye.
void	setPlayerPosition (const glm::vec3 &position)
	Sets the player world position offset. This offset is applied to all view matrices.
glm::vec3	getPlayerPosition () const
	Gets the current player world position.
glm::mat4	getEyeProjectionMatrix (size_t eyeIndex) const
	Gets the projection matrix for an eye.
glm::mat4	getViewProjectionMatrix (size_t eyeIndex) const
	Gets you a matrix of the multiplied view and projection matrix.
XrSpace	getReferenceSpace () const
	Gets reference space for the xr headset.
XrSession	getSession () const
	Gets the active xr session.
bool	getIsExitRequested () const
	Gets whether the headset has requested for the application to stop.
XrFrameState	getXrFrameState () const
	gets the current state of the frame
const RenderTarget *	getRenderTarget (size_t swapchainImageIndex) const
VkSampler	getHiZSampler () const
VkImage	getDepthBufferImage () const
VkImageView	getDepthBufferView () const
VkImage	getColorBufferImage () const
VkImageView	getColorBufferView () const

Private Member Functions
void	createHiZSampler (VkDevice device)

Private Attributes
XrViewState	xrViewState = {}
XrFrameState	xrFrameState = {}
XrSessionState	xrSessionState = XR_SESSION_STATE_UNKNOWN
bool	isExistRequested = false
const ApplicationContext *	context = nullptr
VkRenderPass	vkRenderPass = VK_NULL_HANDLE
	The vulkan render pass.
XrSession	xrSession = XR_NULL_HANDLE
	The xr session.
XrSpace	xrReferenceSpace = XR_NULL_HANDLE
	The xr reference space.
XrReferenceSpaceType	xrReferenceSpaceType = XR_REFERENCE_SPACE_TYPE_LOCAL
	Type of the xr reference space, if it is room scale or just sitting vr.
uint32_t	eyeCount = 0u
std::vector< XrViewConfigurationView >	eyeImageInfos
std::vector< XrView >	eyePoses
ImageBuffer	colorBuffer
ImageBuffer	depthBuffer
VkSampler	hiZSampler_ = VK_NULL_HANDLE
XrSwapchain	xrSwapchain = nullptr
std::unique_ptr< NamedThreadPool >	xrWaitThreadPool_
std::vector< RenderTarget >	swapchainRenderTargets
	The swapchain render targets. The images get rendered onto those render targets.
std::vector< XrCompositionLayerProjectionView >	eyeRenderInfos
std::vector< Eye >	eyes = {}
XrTime	lastUpdateTime = 0
glm::vec3	playerPosition_ {0.0f, 0.0f, 0.0f}

Detailed Description

Definition at line 37 of file Headset.h.

Member Enumeration Documentation

◆ BeginFrameResult

enum class EngineCore::Headset::BeginFrameResult

strong

Enumerator
Error
RenderFully
SkipRender
SkipFully
ComputeOnly

Definition at line 45 of file Headset.h.

Constructor & Destructor Documentation

◆ Headset()

EngineCore::Headset::Headset ( const ApplicationContext * context = nullptr )

create xr session

create xr play space

get number of eyes

allocate eye poses

verify that color format is supported

create the color buffer

create the swapchain

bind swapchain images to multiview

create the eye render targets

Create Hi-Z sampler for occlusion culling (pyramids are now per-frame in RenderProcess)

Definition at line 28 of file Headset.cpp.

References VulkanHelper::beginSingleTimeCommands(), colorBuffer, context, createHiZSampler(), depthBuffer, VulkanHelper::endSingleTimeCommands(), eyeCount, eyeImageInfos, eyePoses, eyeRenderInfos, eyes, VulkanHelper::findSuitableMemoryType(), EngineCore::RenderTarget::framebuffer, getEyeResolution(), EngineCore::RenderTarget::image, EngineCore::RenderTarget::imageView, EngineCore::OpenXrHelper::makeIdentityPose(), VulkanHelper::setObjectName(), swapchainRenderTargets, TRACY_ZONE_SCOPED_FUNCTION, VulkanHelper::transitionImageLayout(), vkRenderPass, xrReferenceSpace, xrSession, xrSwapchain, EngineCore::xrViewType, and xrWaitThreadPool_.

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◆ ~Headset()

EngineCore::Headset::~Headset ( )

Definition at line 521 of file Headset.cpp.

Member Function Documentation

◆ beginXrFrame()

Headset::BeginFrameResult EngineCore::Headset::beginXrFrame	(	uint32_t &	swapchainImageIndex,
		Renderer *	renderer )

Legacy function that combines waitForXrFrame and beginXrFrameAfterWait. Kept for compatibility but prefer using the split functions for better pipelining.

Definition at line 853 of file Headset.cpp.

References beginXrFrameAfterWait(), and waitForXrFrame().

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◆ beginXrFrameAfterWait()

Headset::BeginFrameResult EngineCore::Headset::beginXrFrameAfterWait ( uint32_t & swapchainImageIndex )

Second part of frame setup: calls xrBeginFrame, acquires swapchain image. MUST be called after previous frame's xrEndFrame has completed.

Parameters

swapchainImageIndex Output parameter for the acquired swapchain image index

Returns: BeginFrameResult indicating rendering status

Definition at line 814 of file Headset.cpp.

References context, eyeCount, eyePoses, RenderFully, SkipRender, TRACY_ZONE_SCOPED_FUNCTION, updateViewMatrix(), xrFrameState, xrReferenceSpace, xrSession, xrSwapchain, and xrViewState.

Referenced by beginXrFrame().

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◆ beginXrSession()

void EngineCore::Headset::beginXrSession ( ) const

Definition at line 911 of file Headset.cpp.

References context, and xrSession.

Referenced by waitForXrFrame().

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◆ cleanup()

void EngineCore::Headset::cleanup ( )

Definition at line 522 of file Headset.cpp.

References colorBuffer, context, depthBuffer, hiZSampler_, swapchainRenderTargets, vkRenderPass, xrReferenceSpace, xrSession, and xrSwapchain.

◆ createHiZSampler()

void EngineCore::Headset::createHiZSampler ( VkDevice device )

private

Definition at line 1023 of file Headset.cpp.

References getEyeResolution(), hiZSampler_, and VulkanHelper::setObjectName().

Referenced by Headset().

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◆ endXrFrame()

void EngineCore::Headset::endXrFrame ( )

Definition at line 866 of file Headset.cpp.

References eyeRenderInfos, TRACY_ZONE_SCOPED_NAMED, xrFrameState, xrReferenceSpace, xrSession, xrSwapchain, and xrViewState.

◆ endXrFrameNoRender()

void EngineCore::Headset::endXrFrameNoRender ( )

Definition at line 899 of file Headset.cpp.

References xrFrameState, and xrSession.

◆ endXrSession()

void EngineCore::Headset::endXrSession ( ) const

ends the xr session and thus terminating the xr window on the headset

Date: 2025-03-14

Author: Konstantin Passig

Definition at line 926 of file Headset.cpp.

References xrSession.

Referenced by waitForXrFrame().

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◆ getColorBufferImage()

VkImage EngineCore::Headset::getColorBufferImage ( ) const

inlinenodiscard

Definition at line 330 of file Headset.h.

References colorBuffer.

◆ getColorBufferView()

VkImageView EngineCore::Headset::getColorBufferView ( ) const

inlinenodiscard

Definition at line 331 of file Headset.h.

References colorBuffer.

◆ getDepthBufferImage()

VkImage EngineCore::Headset::getDepthBufferImage ( ) const

inlinenodiscard

Definition at line 328 of file Headset.h.

References depthBuffer.

◆ getDepthBufferView()

VkImageView EngineCore::Headset::getDepthBufferView ( ) const

inlinenodiscard

Definition at line 329 of file Headset.h.

References depthBuffer.

◆ getEyeCount()

uint32_t EngineCore::Headset::getEyeCount ( ) const

nodiscard

Gets eye count.

Returns: The eye count.

Date: 2025-02-16

Author: Konstantin Passig

Definition at line 948 of file Headset.cpp.

References eyeCount.

Referenced by EngineCore::RenderProcess::updateEyeViewProjectionMatrices(), and EngineCore::RenderProcess::updateFrustumUBOData().

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◆ getEyeProjectionMatrix()

glm::mat4 EngineCore::Headset::getEyeProjectionMatrix ( size_t eyeIndex ) const

nodiscard

Gets the projection matrix for an eye.

Parameters

eyeIndex left or right eye (0, 1)

Returns: the view matrix

Date: 2025-03-14

Author: Konstantin Passig

Definition at line 989 of file Headset.cpp.

References eyes.

Referenced by getViewProjectionMatrix(), and EngineCore::RenderProcess::updateEyeViewProjectionMatrices().

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◆ getEyeResolution()

VkExtent2D EngineCore::Headset::getEyeResolution ( size_t eyeIndex ) const

nodiscard

Gets eye resolution in x and y for a specified eye index. 0 is left.

Parameters

eyeIndex Zero-based index of the eye.

Returns: The eye resolution.

Date: 2025-02-16

Author: Konstantin Passig

Definition at line 953 of file Headset.cpp.

References eyeImageInfos.

Referenced by createHiZSampler(), Headset(), and EngineCore::RenderProcess::updateHiZViewProjectionData().

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◆ getEyeViewMatrix()

glm::mat4 EngineCore::Headset::getEyeViewMatrix ( size_t eyeIndex ) const

nodiscard

Returns the view matrix of the specified eye.

Parameters

eyeIndex left and right eye

Returns: the view matrix of the specified eye

Date: 2025-03-14

Author: 2002e

Definition at line 981 of file Headset.cpp.

References eyes, and playerPosition_.

Referenced by getViewProjectionMatrix().

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◆ getHiZSampler()

VkSampler EngineCore::Headset::getHiZSampler ( ) const

inlinenodiscard

Definition at line 327 of file Headset.h.

References hiZSampler_.

Referenced by EngineCore::RenderProcess::updateComputeObjectCullingDescriptorSets().

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◆ getIsExitRequested()

bool EngineCore::Headset::getIsExitRequested ( ) const

nodiscard

Gets whether the headset has requested for the application to stop.

Returns: if the exit of the application has been requested by open xr

Date: 2025-02-23

Author: Konstantin Passig

Definition at line 1009 of file Headset.cpp.

References isExistRequested.

◆ getPlayerPosition()

glm::vec3 EngineCore::Headset::getPlayerPosition ( ) const

inlinenodiscard

Gets the current player world position.

Returns: The player's world position

Definition at line 180 of file Headset.h.

References playerPosition_.

◆ getReferenceSpace()

XrSpace EngineCore::Headset::getReferenceSpace ( ) const

nodiscard

Gets reference space for the xr headset.

Returns: The reference space.

Date: 2025-02-23

Author: Konstantin Passig

Definition at line 999 of file Headset.cpp.

References xrReferenceSpace.

◆ getRenderPass()

VkRenderPass EngineCore::Headset::getRenderPass ( ) const

nodiscard

Gets render pass.

Returns: The render pass.

Date: 2025-02-15

Author: Konstantin Passig

Definition at line 959 of file Headset.cpp.

References vkRenderPass.

◆ getRenderTarget()

const RenderTarget * EngineCore::Headset::getRenderTarget ( size_t swapchainImageIndex ) const

Definition at line 1018 of file Headset.cpp.

References swapchainRenderTargets.

◆ getSession()

XrSession EngineCore::Headset::getSession ( ) const

nodiscard

Gets the active xr session.

Returns: The xr session.

Date: 2025-02-23

Author: Konstantin Passig

Definition at line 1004 of file Headset.cpp.

References xrSession.

◆ getSwapchainImage()

VkImage EngineCore::Headset::getSwapchainImage ( size_t swapchainImageIndex ) const

nodiscard

Gets the swapchain image for the given index.

Parameters

swapchainImageIndex Index of the swapchain image

Returns: The VkImage handle

Definition at line 918 of file Headset.cpp.

References swapchainRenderTargets.

◆ getSwapchainRenderTargets()

std::vector< RenderTarget > EngineCore::Headset::getSwapchainRenderTargets ( )

Definition at line 922 of file Headset.cpp.

References swapchainRenderTargets.

◆ getViewProjectionMatrix()

glm::mat4 EngineCore::Headset::getViewProjectionMatrix ( size_t eyeIndex ) const

nodiscard

Gets you a matrix of the multiplied view and projection matrix.

Parameters

eyeIndex The frame index

Returns: a matrix with the multiplied view and projection matrix

Date: 2025-06-17

Author: Konstantin Passig

Definition at line 994 of file Headset.cpp.

References getEyeProjectionMatrix(), and getEyeViewMatrix().

Referenced by EngineCore::RenderProcess::updateEyeViewProjectionMatrices().

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◆ getXrFrameState()

XrFrameState EngineCore::Headset::getXrFrameState ( ) const

nodiscard

gets the current state of the frame

Returns: the frame state

Date: 2025-02-23

Author: Konstantin Passig

Definition at line 1013 of file Headset.cpp.

References xrFrameState.

◆ requestExitSession()

void EngineCore::Headset::requestExitSession ( )

Requests the XR runtime to exit the session gracefully. This should be called when the application wants to shut down (e.g., window close). The XR runtime will transition through proper states before exiting.

Definition at line 931 of file Headset.cpp.

References isExistRequested, and xrSession.

◆ setPlayerPosition()

void EngineCore::Headset::setPlayerPosition ( const glm::vec3 & position )

inline

Sets the player world position offset. This offset is applied to all view matrices.

Parameters

position The player's world position

Definition at line 174 of file Headset.h.

References playerPosition_.

◆ updateViewMatrix()

void EngineCore::Headset::updateViewMatrix ( )

Updates the eye matrix for the headset.

Date: 2025-06-17

Author: Konstantin Passig

Definition at line 587 of file Headset.cpp.

References EngineCore::OpenXrHelper::createProjectionMatrix(), eyeCount, eyePoses, eyeRenderInfos, eyes, EngineCore::OpenXrHelper::poseToMatrix(), and TRACY_ZONE_SCOPED_NAMED.

Referenced by beginXrFrameAfterWait().

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◆ waitForXrFrame()

Headset::WaitFrameResult EngineCore::Headset::waitForXrFrame ( Renderer * renderer )

First part of frame setup: calls xrWaitFrame. Can be called before previous xrEndFrame completes. Polls events and waits for the next frame to be ready.

Parameters

renderer Pointer to renderer (used for Tracy context reset on state transitions)

Returns: WaitFrameResult indicating what to do next

Definition at line 604 of file Headset.cpp.

References beginXrSession(), context, endXrSession(), Error, EngineCore::OpenXrHelper::GetXrStructureTypeName(), isExistRequested, RenderFully, EngineCore::Headset::WaitFrameResult::result, EngineCore::OpenXrHelper::sessionStateToString(), EngineCore::Headset::WaitFrameResult::shouldCallBeginFrame, SkipFully, SkipRender, TRACY_ZONE_SCOPED_FUNCTION, TRACY_ZONE_SCOPED_NAMED, xrFrameState, xrSession, xrSessionState, and xrWaitThreadPool_.

Referenced by beginXrFrame().

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Member Data Documentation

◆ colorBuffer

ImageBuffer EngineCore::Headset::colorBuffer

private

Definition at line 290 of file Headset.h.

Referenced by cleanup(), getColorBufferImage(), getColorBufferView(), and Headset().

◆ context

const ApplicationContext* EngineCore::Headset::context = nullptr

private

Definition at line 254 of file Headset.h.

Referenced by beginXrFrameAfterWait(), beginXrSession(), cleanup(), EngineCore::Headset::ImageBuffer::cleanup(), EngineCore::RenderTarget::cleanup(), Headset(), and waitForXrFrame().

◆ depthBuffer

ImageBuffer EngineCore::Headset::depthBuffer

private

Definition at line 291 of file Headset.h.

Referenced by cleanup(), getDepthBufferImage(), getDepthBufferView(), and Headset().

◆ eyeCount

uint32_t EngineCore::Headset::eyeCount = 0u

private

Definition at line 275 of file Headset.h.

Referenced by beginXrFrameAfterWait(), getEyeCount(), Headset(), and updateViewMatrix().

◆ eyeImageInfos

std::vector<XrViewConfigurationView> EngineCore::Headset::eyeImageInfos

private

Definition at line 277 of file Headset.h.

Referenced by getEyeResolution(), and Headset().

◆ eyePoses

std::vector<XrView> EngineCore::Headset::eyePoses

private

Definition at line 279 of file Headset.h.

Referenced by beginXrFrameAfterWait(), Headset(), and updateViewMatrix().

◆ eyeRenderInfos

std::vector<XrCompositionLayerProjectionView> EngineCore::Headset::eyeRenderInfos

private

Definition at line 310 of file Headset.h.

Referenced by endXrFrame(), Headset(), and updateViewMatrix().

◆ eyes

std::vector<Eye> EngineCore::Headset::eyes = {}

private

Definition at line 316 of file Headset.h.

Referenced by getEyeProjectionMatrix(), getEyeViewMatrix(), Headset(), and updateViewMatrix().

◆ hiZSampler_

VkSampler EngineCore::Headset::hiZSampler_ = VK_NULL_HANDLE

private

Definition at line 295 of file Headset.h.

Referenced by cleanup(), createHiZSampler(), and getHiZSampler().

◆ isExistRequested

bool EngineCore::Headset::isExistRequested = false

private

Definition at line 252 of file Headset.h.

Referenced by getIsExitRequested(), requestExitSession(), and waitForXrFrame().

◆ lastUpdateTime

XrTime EngineCore::Headset::lastUpdateTime = 0

private

Definition at line 318 of file Headset.h.

◆ playerPosition_

glm::vec3 EngineCore::Headset::playerPosition_ {0.0f, 0.0f, 0.0f}

private

Definition at line 321 of file Headset.h.

Referenced by getEyeViewMatrix(), getPlayerPosition(), and setPlayerPosition().

◆ swapchainRenderTargets

std::vector<RenderTarget> EngineCore::Headset::swapchainRenderTargets

private

The swapchain render targets. The images get rendered onto those render targets.

Definition at line 308 of file Headset.h.

Referenced by cleanup(), getRenderTarget(), getSwapchainImage(), getSwapchainRenderTargets(), and Headset().

◆ vkRenderPass

VkRenderPass EngineCore::Headset::vkRenderPass = VK_NULL_HANDLE

private

The vulkan render pass.

Definition at line 259 of file Headset.h.

Referenced by cleanup(), getRenderPass(), and Headset().

◆ xrFrameState

XrFrameState EngineCore::Headset::xrFrameState = {}

private

Definition at line 248 of file Headset.h.

Referenced by beginXrFrameAfterWait(), endXrFrame(), endXrFrameNoRender(), getXrFrameState(), and waitForXrFrame().

◆ xrReferenceSpace

XrSpace EngineCore::Headset::xrReferenceSpace = XR_NULL_HANDLE

private

The xr reference space.

Definition at line 269 of file Headset.h.

Referenced by beginXrFrameAfterWait(), cleanup(), endXrFrame(), getReferenceSpace(), and Headset().

◆ xrReferenceSpaceType

XrReferenceSpaceType EngineCore::Headset::xrReferenceSpaceType = XR_REFERENCE_SPACE_TYPE_LOCAL

private

Type of the xr reference space, if it is room scale or just sitting vr.

Definition at line 273 of file Headset.h.

◆ xrSession

XrSession EngineCore::Headset::xrSession = XR_NULL_HANDLE

private

The xr session.

Definition at line 264 of file Headset.h.

Referenced by beginXrFrameAfterWait(), beginXrSession(), cleanup(), endXrFrame(), endXrFrameNoRender(), endXrSession(), getSession(), Headset(), requestExitSession(), and waitForXrFrame().

◆ xrSessionState

XrSessionState EngineCore::Headset::xrSessionState = XR_SESSION_STATE_UNKNOWN

private

Definition at line 250 of file Headset.h.

Referenced by waitForXrFrame().

◆ xrSwapchain

XrSwapchain EngineCore::Headset::xrSwapchain = nullptr

private

Definition at line 299 of file Headset.h.

Referenced by beginXrFrameAfterWait(), cleanup(), endXrFrame(), and Headset().

◆ xrViewState

XrViewState EngineCore::Headset::xrViewState = {}

private

Definition at line 247 of file Headset.h.

Referenced by beginXrFrameAfterWait(), and endXrFrame().

◆ xrWaitThreadPool_

std::unique_ptr<NamedThreadPool> EngineCore::Headset::xrWaitThreadPool_

private

Definition at line 302 of file Headset.h.

Referenced by Headset(), and waitForXrFrame().

The documentation for this class was generated from the following files:

/home/magerbeton/Documents/gl3-vulkan/Engine/include/Engine/Renderer/Headset.h
/home/magerbeton/Documents/gl3-vulkan/Engine/src/Engine/Renderer/Headset.cpp

Classes

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

◆ BeginFrameResult

Constructor & Destructor Documentation

◆ Headset()

◆ ~Headset()

Member Function Documentation

◆ beginXrFrame()

◆ beginXrFrameAfterWait()

◆ beginXrSession()

◆ cleanup()

◆ createHiZSampler()

◆ endXrFrame()

◆ endXrFrameNoRender()

◆ endXrSession()

◆ getColorBufferImage()

◆ getColorBufferView()

◆ getDepthBufferImage()

◆ getDepthBufferView()

◆ getEyeCount()

◆ getEyeProjectionMatrix()

◆ getEyeResolution()

◆ getEyeViewMatrix()

◆ getHiZSampler()

◆ getIsExitRequested()

◆ getPlayerPosition()

◆ getReferenceSpace()

◆ getRenderPass()

◆ getRenderTarget()

◆ getSession()

◆ getSwapchainImage()

◆ getSwapchainRenderTargets()

◆ getViewProjectionMatrix()

◆ getXrFrameState()

◆ requestExitSession()

◆ setPlayerPosition()

◆ updateViewMatrix()

◆ waitForXrFrame()

Member Data Documentation

◆ colorBuffer

◆ context

◆ depthBuffer

◆ eyeCount

◆ eyeImageInfos

◆ eyePoses

◆ eyeRenderInfos

◆ eyes

◆ hiZSampler_

◆ isExistRequested

◆ lastUpdateTime

◆ playerPosition_

◆ swapchainRenderTargets

◆ vkRenderPass

◆ xrFrameState

◆ xrReferenceSpace

◆ xrReferenceSpaceType

◆ xrSession

◆ xrSessionState

◆ xrSwapchain

◆ xrViewState

◆ xrWaitThreadPool_