VkSubresourceHostMemcpySizeEXT

To query the memory size needed to copy to or from an image using vkCopyMemoryToImageEXT or vkCopyImageToMemoryEXT when the VK_HOST_IMAGE_COPY_MEMCPY_EXT flag is specified, add a VkSubresourceHostMemcpySizeEXT structure to the pNext chain of the VkSubresourceLayout2EXT structure in a call to vkGetImageSubresourceLayout2EXT.

The VkSubresourceHostMemcpySizeEXT structure is defined as:

typedef struct VkSubresourceHostMemcpySizeEXT {
    VkStructureType sType;
    void* pNext;
    VkDeviceSize size;
} VkSubresourceHostMemcpySizeEXT;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• size is the size in bytes of the image subresource.