vkGetDescriptorSetLayoutSupport - Query whether a descriptor set layout can be created

Parameters

• device is the logical device that would create the descriptor set layout.

• pCreateInfo is a pointer to an instance of the VkDescriptorSetLayoutCreateInfo structure specifying the state of the descriptor set layout object.
• pSupport points to a VkDescriptorSetLayoutSupport structure in which information about support for the descriptor set layout object is returned.

Description

Some implementations have limitations on what fits in a descriptor set which are not easily expressible in terms of existing limits like maxDescriptorSet*, for example if all descriptor types share a limited space in memory but each descriptor is a different size or alignment. This command returns information about whether a descriptor set satisfies this limit. If the descriptor set layout satisfies the VkPhysicalDeviceMaintenance3Properties::maxPerSetDescriptors limit, this command is guaranteed to return VK_TRUE in VkDescriptorSetLayoutSupport::supported. If the descriptor set layout exceeds the VkPhysicalDeviceMaintenance3Properties::maxPerSetDescriptors limit, whether the descriptor set layout is supported is implementation-dependent and may depend on whether the descriptor sizes and alignments cause the layout to exceed an internal limit.

This command does not consider other limits such as maxPerStageDescriptor*, and so a descriptor set layout that is supported according to this command must still satisfy the pipeline layout limits such as maxPerStageDescriptor* in order to be used in a pipeline layout.

Note

This is a VkDevice query rather than VkPhysicalDevice because the answer may depend on enabled features.

Valid Usage (Implicit)

• device must be a valid VkDevice handle

• pCreateInfo must be a valid pointer to a valid VkDescriptorSetLayoutCreateInfo structure
• pSupport must be a valid pointer to a VkDescriptorSetLayoutSupport structure

See Also

VkDescriptorSetLayoutCreateInfo, VkDescriptorSetLayoutSupport, VkDevice

VkPhysicalDeviceMaintenance3Properties - Structure describing descriptor set properties

Members

The members of the VkPhysicalDeviceMaintenance3Properties structure describe the following implementation-dependent limits:

Description

• maxPerSetDescriptors is a maximum number of descriptors (summed over all descriptor types) in a single descriptor set that is guaranteed to satisfy any implementation-dependent constraints on the size of a descriptor set itself. Applications can query whether a descriptor set that goes beyond this limit is supported using vkGetDescriptorSetLayoutSupport.

• maxMemoryAllocationSize is the maximum size of a memory allocation that can be created, even if there is more space available in the heap.

If the VkPhysicalDeviceMaintenance3Properties structure is included in the pNext chain of VkPhysicalDeviceProperties2, it is filled with the implementation-dependent limits.

Valid Usage (Implicit)

• sType must be VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_3_PROPERTIES

See Also

VkDeviceSize, VkStructureType

VkDescriptorSetLayoutSupport - Structure returning information about whether a descriptor set layout can be supported

Description

supported is set to VK_TRUE if the descriptor set can be created, or else is set to VK_FALSE.

Valid Usage (Implicit)

• sType must be VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_SUPPORT

• pNext must be NULL or a pointer to a valid instance of VkDescriptorSetVariableDescriptorCountLayoutSupportEXT

See Also

VkBool32, VkStructureType, vkGetDescriptorSetLayoutSupport, vkGetDescriptorSetLayoutSupportKHR