Struct Entry

pub struct Entry { /* private fields */ }

Holds the Vulkan functions independent of a particular instance

Implementations

impl Entry

Vulkan core 1.0

pub fn linked() -> Self

Load entry points from a Vulkan loader linked at compile time

Compared to load, this is infallible, but requires that the build environment have Vulkan development packages installed (e.g. the Vulkan SDK, or Ubuntu’s libvulkan-dev), and prevents the resulting binary from starting in environments that do not support Vulkan.

Note that instance/device functions are still fetched via vkGetInstanceProcAddr and vkGetDeviceProcAddr for maximum performance.

use ash::{vk, Entry};
let entry = Entry::linked();
let app_info = vk::ApplicationInfo {
    api_version: vk::make_api_version(0, 1, 0, 0),
    ..Default::default()
};
let create_info = vk::InstanceCreateInfo {
    p_application_info: &app_info,
    ..Default::default()
};
let instance = unsafe { entry.create_instance(&create_info, None)? };

pub unsafe fn from_static_fn(static_fn: StaticFn) -> Self

Load entry points based on an already-loaded vk::StaticFn

Safety

static_fn must contain valid function pointers that comply with the semantics specified by Vulkan 1.0, which must remain valid for at least the lifetime of the returned Entry.

pub fn fp_v1_0(&self) -> &EntryFnV1_0

pub fn static_fn(&self) -> &StaticFn

pub fn try_enumerate_instance_version(&self) -> VkResult<Option<u32>>

https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkEnumerateInstanceVersion.html

let entry = Entry::linked();
match entry.try_enumerate_instance_version()? {
    // Vulkan 1.1+
    Some(version) => {
        let major = vk::version_major(version);
        let minor = vk::version_minor(version);
        let patch = vk::version_patch(version);
    },
    // Vulkan 1.0
    None => {},
}

pub unsafe fn create_instance( &self, create_info: &InstanceCreateInfo, allocation_callbacks: Option<&AllocationCallbacks>, ) -> VkResult<Instance>

https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkCreateInstance.html

Safety

In order for the created Instance to be valid for the duration of its usage, the Entry this was called on must be dropped later than the resulting Instance.

pub fn enumerate_instance_layer_properties( &self, ) -> VkResult<Vec<LayerProperties>>

https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkEnumerateInstanceLayerProperties.html

pub fn enumerate_instance_extension_properties( &self, layer_name: Option<&CStr>, ) -> VkResult<Vec<ExtensionProperties>>

https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkEnumerateInstanceExtensionProperties.html

pub unsafe fn get_instance_proc_addr( &self, instance: Instance, p_name: *const c_char, ) -> PFN_vkVoidFunction

https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkGetInstanceProcAddr.html

impl Entry

Vulkan core 1.1

pub fn fp_v1_1(&self) -> &EntryFnV1_1

pub fn enumerate_instance_version(&self) -> VkResult<u32>

👎Deprecated: This function is unavailable and therefore panics on Vulkan 1.0, please use try_enumerate_instance_version() instead

https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkEnumerateInstanceVersion.html

Please use try_enumerate_instance_version() instead.

impl Entry

Vulkan core 1.2

pub fn fp_v1_2(&self) -> &EntryFnV1_2

impl Entry

Vulkan core 1.3

pub fn fp_v1_3(&self) -> &EntryFnV1_3

Trait Implementations

impl Clone for Entry

fn clone(&self) -> Entry

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for Entry

fn default() -> Self

Returns the “default value” for a type.