vkGetImageSparseMemoryRequirements

To query sparse memory requirements for an image, call:

void vkGetImageSparseMemoryRequirements(
    VkDevice device,
    VkImage image,
    uint32_t* pSparseMemoryRequirementCount,
    VkSparseImageMemoryRequirements* pSparseMemoryRequirements);

• device is the logical device that owns the image.
• image is the VkImage object to get the memory requirements for.
• pSparseMemoryRequirementCount is a pointer to an integer related to the number of sparse memory requirements available or queried, as described below.
• pSparseMemoryRequirements is either NULL or a pointer to an array of VkSparseImageMemoryRequirements structures.

If pSparseMemoryRequirements is NULL, then the number of sparse memory requirements available is returned in pSparseMemoryRequirementCount. Otherwise, pSparseMemoryRequirementCount must point to a variable set by the application to the number of elements in the pSparseMemoryRequirements array, and on return the variable is overwritten with the number of structures actually written to pSparseMemoryRequirements. If pSparseMemoryRequirementCount is less than the number of sparse memory requirements available, at most pSparseMemoryRequirementCount structures will be written.

If the image was not created with VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT then pSparseMemoryRequirementCount will be zero and pSparseMemoryRequirements will not be written to.