vkCmdWriteMicromapsPropertiesEXT(3)

C Specification

To query micromap size parameters call:

// Provided by VK_EXT_opacity_micromap
void vkCmdWriteMicromapsPropertiesEXT(
    VkCommandBuffer                             commandBuffer,
    uint32_t                                    micromapCount,
    const VkMicromapEXT*                        pMicromaps,
    VkQueryType                                 queryType,
    VkQueryPool                                 queryPool,
    uint32_t                                    firstQuery);

Parameters

commandBuffer is the command buffer into which the command will be recorded.
micromapCount is the count of micromaps for which to query the property.
pMicromaps is a pointer to an array of existing previously built micromaps.
queryType is a VkQueryType value specifying the type of queries managed by the pool.
queryPool is the query pool that will manage the results of the query.
firstQuery is the first query index within the query pool that will contain the micromapCount number of results.

Description

Accesses to any of the micromaps listed in pMicromaps must be synchronized with the VK_PIPELINE_STAGE_2_MICROMAP_BUILD_BIT_EXT pipeline stage and an access type of VK_ACCESS_2_MICROMAP_READ_BIT_EXT.

If queryType is VK_QUERY_TYPE_MICROMAP_SERIALIZATION_SIZE_EXT, then the value written out is the number of bytes required by a serialized micromap.
If queryType is VK_QUERY_TYPE_MICROMAP_COMPACTED_SIZE_EXT, then the value written out is the number of bytes required by a compacted micromap.

Valid Usage

VUID-vkCmdWriteMicromapsPropertiesEXT-queryPool-07525
queryPool must have been created with a queryType matching queryType
VUID-vkCmdWriteMicromapsPropertiesEXT-queryPool-07526
The queries identified by queryPool and firstQuery must be unavailable
VUID-vkCmdWriteMicromapsPropertiesEXT-buffer-07527
The buffer used to create each micromap in pMicrmaps must be bound to device memory
VUID-vkCmdWriteMicromapsPropertiesEXT-query-07528
The sum of query plus micromapCount must be less than or equal to the number of queries in queryPool

VUID-vkCmdWriteMicromapsPropertiesEXT-pMicromaps-07501
All micromaps in pMicromaps must have been constructed prior to the execution of this command
VUID-vkCmdWriteMicromapsPropertiesEXT-pMicromaps-07502
All micromaps in pMicromaps must have been constructed with VK_BUILD_MICROMAP_ALLOW_COMPACTION_BIT_EXT if queryType is VK_QUERY_TYPE_MICROMAP_COMPACTED_SIZE_EXT
VUID-vkCmdWriteMicromapsPropertiesEXT-queryType-07503
queryType must be VK_QUERY_TYPE_MICROMAP_COMPACTED_SIZE_EXT or VK_QUERY_TYPE_MICROMAP_SERIALIZATION_SIZE_EXT

Valid Usage (Implicit)

VUID-vkCmdWriteMicromapsPropertiesEXT-commandBuffer-parameter
commandBuffer must be a valid VkCommandBuffer handle
VUID-vkCmdWriteMicromapsPropertiesEXT-pMicromaps-parameter
pMicromaps must be a valid pointer to an array of micromapCount valid VkMicromapEXT handles
VUID-vkCmdWriteMicromapsPropertiesEXT-queryType-parameter
queryType must be a valid VkQueryType value
VUID-vkCmdWriteMicromapsPropertiesEXT-queryPool-parameter
queryPool must be a valid VkQueryPool handle
VUID-vkCmdWriteMicromapsPropertiesEXT-commandBuffer-recording
commandBuffer must be in the recording state
VUID-vkCmdWriteMicromapsPropertiesEXT-commandBuffer-cmdpool
The VkCommandPool that commandBuffer was allocated from must support compute operations
VUID-vkCmdWriteMicromapsPropertiesEXT-renderpass
This command must only be called outside of a render pass instance
VUID-vkCmdWriteMicromapsPropertiesEXT-videocoding
This command must only be called outside of a video coding scope
VUID-vkCmdWriteMicromapsPropertiesEXT-micromapCount-arraylength
micromapCount must be greater than 0
VUID-vkCmdWriteMicromapsPropertiesEXT-commonparent
Each of commandBuffer, queryPool, and the elements of pMicromaps must have been created, allocated, or retrieved from the same VkDevice

Host Synchronization

Host access to commandBuffer must be externally synchronized
Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized