C Specification

The VkDescriptorPoolSize structure is defined as:

// Provided by VK_VERSION_1_0
typedef struct VkDescriptorPoolSize {
    VkDescriptorType    type;
    uint32_t            descriptorCount;
} VkDescriptorPoolSize;


  • type is the type of descriptor.

  • descriptorCount is the number of descriptors of that type to allocate. If type is VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK then descriptorCount is the number of bytes to allocate for descriptors of this type.



When creating a descriptor pool that will contain descriptors for combined image samplers of multi-planar formats, an application needs to account for non-trivial descriptor consumption when choosing the descriptorCount value, as indicated by VkSamplerYcbcrConversionImageFormatProperties::combinedImageSamplerDescriptorCount.

For simplicity the application can use the VkPhysicalDeviceMaintenance6PropertiesKHR::maxCombinedImageSamplerDescriptorCount property, which is sized to accommodate any and all formats that require a sampler Y′CBCR conversion supported by the implementation.

Valid Usage
  • VUID-VkDescriptorPoolSize-descriptorCount-00302
    descriptorCount must be greater than 0

  • VUID-VkDescriptorPoolSize-type-02218
    If type is VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK then descriptorCount must be a multiple of 4

Valid Usage (Implicit)
  • VUID-VkDescriptorPoolSize-type-parameter
    type must be a valid VkDescriptorType value

See Also

Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

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