VkPhysicalDeviceDescriptorBufferPropertiesEXT

The VkPhysicalDeviceDescriptorBufferPropertiesEXT structure is defined as:

typedef struct VkPhysicalDeviceDescriptorBufferPropertiesEXT {
    VkStructureType sType;
    void* pNext;
    VkBool32 combinedImageSamplerDescriptorSingleArray;
    VkBool32 bufferlessPushDescriptors;
    VkBool32 allowSamplerImageViewPostSubmitCreation;
    VkDeviceSize descriptorBufferOffsetAlignment;
    uint32_t maxDescriptorBufferBindings;
    uint32_t maxResourceDescriptorBufferBindings;
    uint32_t maxSamplerDescriptorBufferBindings;
    uint32_t maxEmbeddedImmutableSamplerBindings;
    uint32_t maxEmbeddedImmutableSamplers;
    size_t bufferCaptureReplayDescriptorDataSize;
    size_t imageCaptureReplayDescriptorDataSize;
    size_t imageViewCaptureReplayDescriptorDataSize;
    size_t samplerCaptureReplayDescriptorDataSize;
    size_t accelerationStructureCaptureReplayDescriptorDataSize;
    size_t samplerDescriptorSize;
    size_t combinedImageSamplerDescriptorSize;
    size_t sampledImageDescriptorSize;
    size_t storageImageDescriptorSize;
    size_t uniformTexelBufferDescriptorSize;
    size_t robustUniformTexelBufferDescriptorSize;
    size_t storageTexelBufferDescriptorSize;
    size_t robustStorageTexelBufferDescriptorSize;
    size_t uniformBufferDescriptorSize;
    size_t robustUniformBufferDescriptorSize;
    size_t storageBufferDescriptorSize;
    size_t robustStorageBufferDescriptorSize;
    size_t inputAttachmentDescriptorSize;
    size_t accelerationStructureDescriptorSize;
    VkDeviceSize maxSamplerDescriptorBufferRange;
    VkDeviceSize maxResourceDescriptorBufferRange;
    VkDeviceSize samplerDescriptorBufferAddressSpaceSize;
    VkDeviceSize resourceDescriptorBufferAddressSpaceSize;
    VkDeviceSize descriptorBufferAddressSpaceSize;
} VkPhysicalDeviceDescriptorBufferPropertiesEXT;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• combinedImageSamplerDescriptorSingleArray indicates that the implementation does not require an array of VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER descriptors to be written into a descriptor buffer as an array of image descriptors, immediately followed by an array of sampler descriptors.
• bufferlessPushDescriptors indicates that the implementation does not require a buffer created with VK_BUFFER_USAGE_PUSH_DESCRIPTORS_DESCRIPTOR_BUFFER_BIT_EXT to be bound when using push descriptors.
• allowSamplerImageViewPostSubmitCreation indicates that the implementation does not restrict when the VkSampler or VkImageView objects used to retrieve descriptor data can be created in relation to command buffer submission. If this value is VK_FALSE, then the application must create any VkSampler or VkImageView objects whose descriptor data is accessed during the execution of a command buffer, before the vkQueueSubmit , or vkQueueSubmit2, call that submits that command buffer.
• descriptorBufferOffsetAlignment indicates the required alignment in bytes when setting offsets into the descriptor buffer.
• maxDescriptorBufferBindings indicates the maximum sum total number of descriptor buffers and embedded immutable sampler sets that can be bound.
• maxResourceDescriptorBufferBindings indicates the maximum number of resource descriptor buffers that can be bound.
• maxSamplerDescriptorBufferBindings indicates the maximum number of sampler descriptor buffers that can be bound.
• maxEmbeddedImmutableSamplerBindings indicates the maximum number of embedded immutable sampler sets that can be bound.
• maxEmbeddedImmutableSamplers indicates the maximum number of unique immutable samplers in descriptor set layouts created with VK_DESCRIPTOR_SET_LAYOUT_CREATE_EMBEDDED_IMMUTABLE_SAMPLERS_BIT_EXT, and pipeline layouts created from them, which can simultaneously exist on a device.
• bufferCaptureReplayDescriptorDataSize indicates the maximum size in bytes of the opaque data used for capture and replay with buffers.
• imageCaptureReplayDescriptorDataSize indicates the maximum size in bytes of the opaque data used for capture and replay with images.
• imageViewCaptureReplayDescriptorDataSize indicates the maximum size in bytes of the opaque data used for capture and replay with image views.
• samplerCaptureReplayDescriptorDataSize indicates the maximum size in bytes of the opaque data used for capture and replay with samplers.
• accelerationStructureCaptureReplayDescriptorDataSize indicates the maximum size in bytes of the opaque data used for capture and replay with acceleration structures.
• samplerDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_SAMPLER descriptor.
• combinedImageSamplerDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER descriptor.
• sampledImageDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE descriptor.
• storageImageDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_STORAGE_IMAGE descriptor.
• uniformTexelBufferDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER descriptor if the robustBufferAccess feature is not enabled.
• robustUniformTexelBufferDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER descriptor if the robustBufferAccess feature is enabled.
• storageTexelBufferDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER descriptor if the robustBufferAccess feature is not enabled.
• robustStorageTexelBufferDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER descriptor if the robustBufferAccess feature is enabled.
• uniformBufferDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER descriptor.
• robustUniformBufferDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER descriptor if the robustBufferAccess feature is enabled.
• storageBufferDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_STORAGE_BUFFER descriptor.
• robustStorageBufferDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_STORAGE_BUFFER descriptor if the robustBufferAccess feature is enabled.
• inputAttachmentDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT descriptor.
• accelerationStructureDescriptorSize indicates the size in bytes of a VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR or VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_NV descriptor.
• maxSamplerDescriptorBufferRange indicates the maximum range in bytes from the address of a sampler descriptor buffer binding that is accessible to a shader.
• maxResourceDescriptorBufferRange indicates the maximum range in bytes from the address of a resource descriptor buffer binding that is accessible to a shader.
• samplerDescriptorBufferAddressSpaceSize indicates the total size in bytes of the address space available for descriptor buffers created with VK_BUFFER_USAGE_SAMPLER_DESCRIPTOR_BUFFER_BIT_EXT.
• resourceDescriptorBufferAddressSpaceSize indicates the total size in bytes of the address space available for descriptor buffers created with VK_BUFFER_USAGE_RESOURCE_DESCRIPTOR_BUFFER_BIT_EXT.
• descriptorBufferAddressSpaceSize indicates the total size in bytes of the address space available for descriptor buffers created with both VK_BUFFER_USAGE_SAMPLER_DESCRIPTOR_BUFFER_BIT_EXT and VK_BUFFER_USAGE_RESOURCE_DESCRIPTOR_BUFFER_BIT_EXT.

A descriptor binding with type VK_DESCRIPTOR_TYPE_MUTABLE_VALVE has a descriptor size which is implied by the descriptor types included in the VkMutableDescriptorTypeCreateInfoVALVE::pDescriptorTypes list. The descriptor size is equal to the maximum size of any descriptor type included in the pDescriptorTypes list.

As there is no way to request robust and non-robust descriptors separately, or specify robust/non-robust descriptors in the set layout, if robustBufferAccess is enabled then robust descriptors are always used.

If the VkPhysicalDeviceDescriptorBufferPropertiesEXT structure is included in the pNext chain of the VkPhysicalDeviceProperties2 structure passed to vkGetPhysicalDeviceProperties2, it is filled in with each corresponding implementation-dependent property.