vkGetPhysicalDeviceDescriptorSizeEXT

To query the size of heap descriptor for a specific VkDescriptorType, call:

VkDeviceSize vkGetPhysicalDeviceDescriptorSizeEXT(
    VkPhysicalDevice                                    physicalDevice,
    VkDescriptorType                                    descriptorType);

pub fn get_physical_device_descriptor_size_ext(
    physical_device: vk::PhysicalDevice,
    descriptor_type: vk::DescriptorType,
) -> vk::DeviceSize;

• physicalDevice is the physical device from which to query the descriptor sizes.
• descriptorType is a VkDescriptorType specifying the type of heap descriptor to query the size for.

The return value of this function will be a VkDeviceSize indicating the size in bytes (N) of a heap descriptor with a type equal to descriptorType. When a descriptor of this type is written by vkWriteResourceDescriptorsEXT or vkWriteSamplerDescriptorsEXT, only the first N bytes are written; the rest will not be accessed and can be safely discarded when copying descriptors around. Additionally, those first N bytes are the only bytes that will be accessed when the descriptor is accessed in the shader. N will never be larger than the applicable limits in VkPhysicalDeviceDescriptorHeapTensorPropertiesARM or VkPhysicalDeviceDescriptorHeapPropertiesEXT.