VkDescriptorPoolSize

The VkDescriptorPoolSize structure is defined as:

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 VkPhysicalDeviceMaintenance6Properties::maxCombinedImageSamplerDescriptorCount property, which is sized to accommodate any and all formats that require a sampler Y′C_BC_R 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