#include <ShaderLightArray.h>

Classes
struct	LightsInFrustum

struct	Resources

Public Member Functions
	~ShaderLightArray ()

std::variant< std::unique_ptr< ShaderLightArraySlot >, Error >	reserveNewSlot (Node pSpawnedOwnerLightNode, size_t iDataSizeInBytes, const std::function< void ()> &startUpdateCallback, const std::function< void()> &finishUpdateCallback)

std::pair< std::recursive_mutex, Resources > *	getInternalResources ()

std::string	getShaderResourceName () const

Static Public Member Functions
static std::unique_ptr< ShaderLightArray >	create (Renderer *pRenderer, const std::string &sShaderLightResourceName, const std::function< void(size_t)> &onSizeChanged, const std::optional< std::pair< std::function< void(size_t)>, std::string > > &optionalOnLightsInCameraFrustumCulled)

Private Member Functions
	ShaderLightArray (Renderer *pRenderer, const std::string &sShaderLightResourceName, const std::function< void(size_t)> &onSizeChanged, const std::optional< std::function< void(size_t)> > &optionalCallbackOnLightsInCameraFrustumCulled, const std::string &sIndicesLightsInFrustumShaderResourceName="")

void	onLightsInCameraFrustumCulled (size_t iCurrentFrameResourceIndex)

std::optional< Error >	recreateArray (bool bIsInitialization=false)

void	updateSlotsMarkedAsNeedsUpdate (size_t iCurrentFrameResourceIndex)

std::optional< Error >	updateBindingsInAllPipelines ()

std::optional< Error >	updatePipelineBinding (Pipeline *pPipeline)

void	freeSlot (ShaderLightArraySlot *pSlot)

void	markSlotAsNeedsUpdate (ShaderLightArraySlot *pSlot)

Private Attributes
std::pair< std::recursive_mutex, Resources >	mtxResources

Renderer *	pRenderer = nullptr

size_t	iElementSizeInBytes = 0

const std::optional< std::function< void(size_t)> >	optionalCallbackOnLightsInCameraFrustumCulled

const std::function< void(size_t)>	onSizeChanged

const std::string	sShaderLightResourceName

Friends
class	ShaderLightArraySlot

class	LightingShaderResourceManager

class	Renderer

Detailed Description

Manages an array (defined in shaders) related to lighting and allows modifying array data from CPU side.

Constructor & Destructor Documentation

◆ ~ShaderLightArray()

ne::ShaderLightArray::~ShaderLightArray ( )

Makes sure there are no active slots.

◆ ShaderLightArray()

ne::ShaderLightArray::ShaderLightArray	(	Renderer *	pRenderer,
		const std::string &	sShaderLightResourceName,
		const std::function< void(size_t)> &	onSizeChanged,
		const std::optional< std::function< void(size_t)> > &	optionalCallbackOnLightsInCameraFrustumCulled,
		const std::string &	sIndicesLightsInFrustumShaderResourceName = `""`
	)

private

Creates a new array.

Warning: Only used internally, prefer to use create.

Parameters

pRenderer	Used renderer.
sShaderLightResourceName	Name of the resource (specified in shader code) that this array should bind to.
onSizeChanged	Callback that will be called after array's size changed with the current array size passed as the only argument.
optionalCallbackOnLightsInCameraFrustumCulled	If specified will be called after array of indices to lights in camera frustum changed (indices changed) with the current frame resource index as the only argument, otherwise (if empty) GPU resources for such array will not be created and this callback will never be called.
sIndicesLightsInFrustumShaderResourceName	If callback for culled lights in camera frustum is specified stores name of the shader resource used for the array of indices of non-culled lights.

Member Function Documentation

◆ create()

std::unique_ptr< ShaderLightArray > ne::ShaderLightArray::create	(	Renderer *	pRenderer,
		const std::string &	sShaderLightResourceName,
		const std::function< void(size_t)> &	onSizeChanged,
		const std::optional< std::pair< std::function< void(size_t)>, std::string > > &	optionalOnLightsInCameraFrustumCulled
	)

static

Creates a new array.

Parameters

pRenderer	Used renderer.
sShaderLightResourceName	Name of the resource (specified in shader code) that this array should bind to.
onSizeChanged	Callback that will be called after array's size changed with the current array size passed as the only argument.
optionalOnLightsInCameraFrustumCulled	A pair of callback and shader resource name that are used for array that stores indices of light sources in camera's frustum. If specified the callback will be called after array of indices to lights in camera frustum changed (indices changed) with the current frame resource index as the only argument, otherwise (if empty) GPU resources for such array will not be created and this callback will never be called.

Returns: Created array.

◆ freeSlot()

void ne::ShaderLightArray::freeSlot ( ShaderLightArraySlot * pSlot )

private

Called by slot-objects to notify the array that a slot is no longer used.

Parameters

pSlot Slot that is being destroyed.

◆ getInternalResources()

std::pair< std::recursive_mutex, ShaderLightArray::Resources > * ne::ShaderLightArray::getInternalResources ( )

Returns internal resources of this array.

Remarks: Generally used for tests (read-only), you should not modify them.

Returns: Internal resources.

◆ getShaderResourceName()

std::string ne::ShaderLightArray::getShaderResourceName ( ) const

Returns name of the resource (specified in shader code) that this array is binded to.

Returns: Shader resource name.

◆ markSlotAsNeedsUpdate()

void ne::ShaderLightArray::markSlotAsNeedsUpdate ( ShaderLightArraySlot * pSlot )

private

Queues the specified slot's data to be updated later.

Parameters

pSlot Slot to update later.

◆ onLightsInCameraFrustumCulled()

void ne::ShaderLightArray::onLightsInCameraFrustumCulled ( size_t iCurrentFrameResourceIndex )

private

Called after the renderer culls lights (so that indices of lights sources in camera's frustum change) to copy the new (modified) data to the GPU.

Parameters

iCurrentFrameResourceIndex Index of the frame resource that will be used to submit the next frame.

◆ recreateArray()

std::optional< Error > ne::ShaderLightArray::recreateArray ( bool bIsInitialization = false )

private

(Re)creates GPU resources to hold the current number of active slots and updates all previously existing slots.

Parameters

bIsInitialization true if we are creating resources for the first time and there are no active slots at the moment but since we need valid (non nullptr resources) we will create resources that will hold 1 slot, false otherwise.

Returns: Error if something went wrong.

◆ reserveNewSlot()

std::variant< std::unique_ptr< ShaderLightArraySlot >, Error > ne::ShaderLightArray::reserveNewSlot	(	Node *	pSpawnedOwnerLightNode,
		size_t	iDataSizeInBytes,
		const std::function< void *()> &	startUpdateCallback,
		const std::function< void()> &	finishUpdateCallback
	)

Reserves a new slot in the array to store some data.

Remarks: While you hold the returned slot-object (and while it's not destroyed), it can call update callbacks at any time.; Update callbacks will be called inside of this function to copy the initial data.; If you mark your slot as "needs update" callbacks may be called multiple times (this is perfectly fine, just don't rely on your callbacks being called only once).

Parameters

pSpawnedOwnerLightNode	Spawned light node that requests the slot. Used for light culling.
iDataSizeInBytes	Size of the data that you want to store in the slot in bytes.
startUpdateCallback	Callback that will be called after you mark your slot as "needs update" when the engine is ready to copy the data to the GPU. You must return a pointer which data will be copied.
finishUpdateCallback	Callback that will be called after the copying of your new data is finished.

Returns: Error if something went wrong, otherwise reserved slot.

◆ updateBindingsInAllPipelines()

std::optional< Error > ne::ShaderLightArray::updateBindingsInAllPipelines ( )

private

Binds the underlying GPU resource to descriptors of pipelines that use this array in shaders.

Remarks: Does nothing if DirectX renderer is used.

Returns: Error if something went wrong.

◆ updatePipelineBinding()

std::optional< Error > ne::ShaderLightArray::updatePipelineBinding ( Pipeline * pPipeline )

private

Binds the underlying GPU resource to the specified pipeline's descriptor (if this pipeline's shaders use this array, otherwise return empty).

Remarks: Does nothing if DirectX renderer is used.

Parameters

pPipeline Pipeline to bind to / rebind to.

Returns: Error if something went wrong.

◆ updateSlotsMarkedAsNeedsUpdate()

void ne::ShaderLightArray::updateSlotsMarkedAsNeedsUpdate ( size_t iCurrentFrameResourceIndex )

private

Goes through all slots that are marked as "needs update" and copies their new data to the GPU resource.

Parameters

iCurrentFrameResourceIndex Index of the frame resource that will be used to submit the next frame.

Member Data Documentation

◆ iElementSizeInBytes

size_t ne::ShaderLightArray::iElementSizeInBytes = 0

private

Size of one array element in bytes.

◆ mtxResources

std::pair<std::recursive_mutex, Resources> ne::ShaderLightArray::mtxResources

private

Internal data.

◆ onSizeChanged

const std::function<void(size_t)> ne::ShaderLightArray::onSizeChanged

private

Callback that will be called after array's size changed with the current array size passed as the only argument.

◆ optionalCallbackOnLightsInCameraFrustumCulled

const std::optional<std::function<void(size_t)> > ne::ShaderLightArray::optionalCallbackOnLightsInCameraFrustumCulled

private

If specified will be called after array of indices to lights in camera frustum changed (indices changed) with the current frame resource index as the only argument, otherwise (if empty) GPU resources for such array will not be created and this callback will never be called.

◆ pRenderer

Renderer* ne::ShaderLightArray::pRenderer = nullptr

private

Used renderer.

◆ sShaderLightResourceName

const std::string ne::ShaderLightArray::sShaderLightResourceName

private

Name of the resource (specified in shader code) that this array should bind to.

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

src/engine_lib/private/shader/general/resources/ShaderLightArray.h
src/engine_lib/private/shader/general/resources/ShaderLightArray.cpp

Classes

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

◆ ~ShaderLightArray()

◆ ShaderLightArray()

Member Function Documentation

◆ create()

◆ freeSlot()

◆ getInternalResources()

◆ getShaderResourceName()

◆ markSlotAsNeedsUpdate()

◆ onLightsInCameraFrustumCulled()

◆ recreateArray()

◆ reserveNewSlot()

◆ updateBindingsInAllPipelines()

◆ updatePipelineBinding()

◆ updateSlotsMarkedAsNeedsUpdate()

Member Data Documentation

◆ iElementSizeInBytes

◆ mtxResources

◆ onSizeChanged

◆ optionalCallbackOnLightsInCameraFrustumCulled

◆ pRenderer

◆ sShaderLightResourceName