ComputeComponentInstance Class Reference

#include <computecomponent.h>

Public Member Functions
	ComputeComponentInstance (EntityInstance &entity, Component &resource)
virtual bool	init (utility::ErrorState &errorState) override
void	compute (VkCommandBuffer commandBuffer)
void	compute (VkCommandBuffer commandBuffer, uint numInvocations)
ComputeMaterialInstance &	getMaterialInstance ()
glm::u32vec3	getWorkGroupSize () const
void	setInvocations (uint numInvocations)
uint	getInvocations () const
Public Member Functions inherited from ComponentInstance
	ComponentInstance (EntityInstance &entity, Component &resource)
virtual void	update (double deltaTime)
nap::EntityInstance *	getEntityInstance () const
nap::Component *	getComponent () const
template<typename T >
T *	getComponent () const
Public Member Functions inherited from Object
	Object ()
virtual	~Object ()
virtual void	onDestroy ()
	Object (Object &)=delete
Object &	operator= (const Object &)=delete
	Object (Object &&)=delete
Object &	operator= (Object &&)=delete

Protected Member Functions
virtual void	onCompute (VkCommandBuffer commandBuffer, uint numInvocations)
void	insertBarriers (VkCommandBuffer commandBuffer)

Protected Attributes
RenderService *	mRenderService = nullptr
ComputeMaterialInstance	mComputeMaterialInstance
uint	mInvocations = 1

Additional Inherited Members
Static Public Member Functions inherited from Object
static bool	isIDProperty (rtti::Instance &object, const rtti::Property &property)
Public Attributes inherited from Object
std::string	mID
	Property: 'mID' unique name of the object. Used as an identifier by the system. More...

Description

Instance part of Compute Component

The compute component represents a general-purpose computation that mutates one or more storage buffers. Internally, a ComputeComponentInstance manages a ComputeMaterialInstance and can caches the desired invocation count for repeated use.

ComputeComponentInstance::compute() dispatches the compute shader with the given compute command buffer. Multiple compute calls may be stacked and are implicitly synchronized by the resource usage and access types bound to the compute material's descriptor sets.

This component can only be used when 'Compute' is available and enabled in the RenderService, otherwise initialization fails. To enable Compute, make sure 'Compute' is marked under the 'RequiredQueues' in the RenderServiceConfiguration.

Inheritance diagram for ComputeComponentInstance:

Collaboration diagram for ComputeComponentInstance:

Constructor & Destructor Documentation

ComputeComponentInstance()

ComputeComponentInstance	(	EntityInstance &	entity,
		Component &	resource
	)

Member Function Documentation

compute() [1/2]

void compute

(

VkCommandBuffer

commandBuffer

)

Called by the renderservice, calls onCompute() with the number of invocations set in this instance

Parameters

commandBuffer

active command buffer

compute() [2/2]

void compute	(	VkCommandBuffer	commandBuffer,
		uint	numInvocations
	)

Called by the renderservice, calls onCompute() with the given number of invocations

Parameters

commandBuffer	active command buffer
numInvocations	the number of compute shader invocations

getInvocations()

uint getInvocations

(

)

const

Returns the number of compute shader invocations for this instance

getMaterialInstance()

ComputeMaterialInstance& getMaterialInstance

(

)

Returns

compute program.

getWorkGroupSize()

glm::u32vec3 getWorkGroupSize

(

)

const

Returns

the local workgroup size

init()

virtual bool init ( utility::ErrorState &  errorState )

overridevirtual

Initializes the compute instance.

Parameters

errorState

contains the error if initialization fails

Returns

if initialization succeeded.

Reimplemented from ComponentInstance.

insertBarriers()

void insertBarriers ( VkCommandBuffer  commandBuffer )

protected

Inserts memory barriers based on usage properties of the bufferdata. Only does so for storage buffers which are, outside color and depth attachments in render passes, the only resources that can currently be written to. Makes the assumption that the data will be read in a subsequent render pass in the current frame.

onCompute()

virtual void onCompute ( VkCommandBuffer  commandBuffer, uint  numInvocations  )

protectedvirtual

Dispatches the compute shader using the given command buffer, number of invocations and the bound computematerialinstance

Parameters

commandBuffer	active command buffer
numInvocations	the number of compute shader invocations

setInvocations()

void setInvocations

(

uint

numInvocations

)

Sets the number of compute shader invocations for this instance

Parameters

numInvocations

the number of compute shader invocations

Member Data Documentation

mComputeMaterialInstance

ComputeMaterialInstance mComputeMaterialInstance

protected

mInvocations

uint mInvocations = 1

protected

mRenderService

RenderService* mRenderService = nullptr

protected