ezQueryPoolVulkan Class Reference

Pool for GPU queries. More...

#include <QueryPoolVulkan.h>

Public Member Functions
	ezQueryPoolVulkan (ezGALDeviceVulkan *pDevice)
void	Initialize (ezUInt32 uiValidBits)
	Initializes the pool.
void	DeInitialize ()
void	AfterBeginFrame (vk::CommandBuffer commandBuffer)
	Needs to be called every frame so the pool can figure out which queries have finished and reuse old data.
void	EnsureFreeQueryPoolSize (vk::CommandBuffer commandBuffer)
	We have to call this before each begin rendering call as if we run out of queries inside a render pass, we can't recover given that resetQueryPool can only be called outside a render pass which is necessary to be called on every new pool.
ezGALTimestampHandle	InsertTimestamp (vk::CommandBuffer commandBuffer, vk::PipelineStageFlagBits pipelineStage=vk::PipelineStageFlagBits::eBottomOfPipe)
	Inserts a timestamp into the given command buffer.
ezEnum< ezGALAsyncResult >	GetTimestampResult (ezGALTimestampHandle hTimestamp, ezTime &out_result, bool bForce=false)
	Retrieves the timestamp value if it is available.
ezGALPoolHandle	BeginOcclusionQuery (vk::CommandBuffer commandBuffer, ezEnum< ezGALQueryType > type)
void	EndOcclusionQuery (vk::CommandBuffer commandBuffer, ezGALPoolHandle hPool)
ezEnum< ezGALAsyncResult >	GetOcclusionQueryResult (ezGALPoolHandle hPool, ezUInt64 &out_uiQueryResult, bool bForce=false)

Detailed Description

Pool for GPU queries.

Member Function Documentation

GetTimestampResult()

ezEnum< ezGALAsyncResult > ezQueryPoolVulkan::GetTimestampResult	(	ezGALTimestampHandle	hTimestamp,
		ezTime &	out_result,
		bool	bForce = false
	)

Retrieves the timestamp value if it is available.

Parameters

hTimestamp	The target timestamp to resolve.
result	The time of the timestamp. If this is empty on success the timestamp has expired.
bForce	Wait for the timestamp to become available.

Returns

Returns false if the result is not available yet.

Initialize()

void ezQueryPoolVulkan::Initialize

(

ezUInt32

uiValidBits

)

Initializes the pool.

Parameters

uiValidBits

The number of valid bits in the query result. Each queue has different query characteristics and a separate pool is needed for each queue.

InsertTimestamp()

ezGALTimestampHandle ezQueryPoolVulkan::InsertTimestamp	(	vk::CommandBuffer	commandBuffer,
		vk::PipelineStageFlagBits	pipelineStage = vk::PipelineStageFlagBits::eBottomOfPipe
	)

Inserts a timestamp into the given command buffer.

Parameters

commandBuffer	Target command buffer to insert the timestamp into.
hTimestamp	Timestamp to insert. After insertion the only valid option is to call GetTimestampResult.
pipelineStage	The value of the timestamp will be the point in time in which all previously committed commands have finished this stage.

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

• /home/runner/work/ezEngine/ezEngine/Code/Engine/RendererVulkan/Pools/QueryPoolVulkan.h
• /home/runner/work/ezEngine/ezEngine/Code/Engine/RendererVulkan/Pools/Implementation/QueryPoolVulkan.cpp