VkDescriptorDataEXT

Data describing the descriptor is passed in a VkDescriptorDataEXT structure:

typedef union VkDescriptorDataEXT {
    const VkSampler* pSampler;
    const VkDescriptorImageInfo* pCombinedImageSampler;
    const VkDescriptorImageInfo* pInputAttachmentImage;
    const VkDescriptorImageInfo* pSampledImage;
    const VkDescriptorImageInfo* pStorageImage;
    const VkDescriptorAddressInfoEXT* pUniformTexelBuffer;
    const VkDescriptorAddressInfoEXT* pStorageTexelBuffer;
    const VkDescriptorAddressInfoEXT* pUniformBuffer;
    const VkDescriptorAddressInfoEXT* pStorageBuffer;
    VkDeviceAddress accelerationStructure;
} VkDescriptorDataEXT;

• pSampler is a pointer to a VkSampler handle specifying the parameters of a VK_DESCRIPTOR_TYPE_SAMPLER descriptor.
• pCombinedImageSampler is a pointer to a VkDescriptorImageInfo structure specifying the parameters of a VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER descriptor.
• pInputAttachmentImage is a pointer to a VkDescriptorImageInfo structure specifying the parameters of a VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT descriptor.
• pSampledImage is a pointer to a VkDescriptorImageInfo structure specifying the parameters of a VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE descriptor.
• pStorageImage is a pointer to a VkDescriptorImageInfo structure specifying the parameters of a VK_DESCRIPTOR_TYPE_STORAGE_IMAGE descriptor.
• pUniformTexelBuffer is a pointer to a VkDescriptorAddressInfoEXT structure specifying the parameters of a VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER descriptor.
• pStorageTexelBuffer is a pointer to a VkDescriptorAddressInfoEXT structure specifying the parameters of a VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER descriptor.
• pUniformBuffer is a pointer to a VkDescriptorAddressInfoEXT structure specifying the parameters of a VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER descriptor.
• pStorageBuffer is a pointer to a VkDescriptorAddressInfoEXT structure specifying the parameters of a VK_DESCRIPTOR_TYPE_STORAGE_BUFFER descriptor.
• accelerationStructure is the address of a VkAccelerationStructureKHR specifying the parameters of a VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR descriptor , or a VkAccelerationStructureNV handle specifying the parameters of a VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_NV descriptor.

If the nullDescriptor feature is enabled, pSampledImage, pStorageImage, pUniformTexelBuffer, pStorageTexelBuffer, pUniformBuffer, and pStorageBuffercan each be NULL. Loads from a null descriptor return zero values and stores and atomics to a null descriptor are discarded.

If the nullDescriptor feature is enabled, accelerationStructure can be 0. A null acceleration structure descriptor results in the miss shader being invoked.