ash/extensions/ext/
headless_surface.rs

1use crate::prelude::*;
2use crate::vk;
3use crate::RawPtr;
4use crate::{Entry, Instance};
5use std::ffi::CStr;
6use std::mem;
7
8/// <https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VK_EXT_headless_surface.html>
9#[derive(Clone)]
10pub struct HeadlessSurface {
11    handle: vk::Instance,
12    fp: vk::ExtHeadlessSurfaceFn,
13}
14
15impl HeadlessSurface {
16    pub fn new(entry: &Entry, instance: &Instance) -> Self {
17        let handle = instance.handle();
18        let fp = vk::ExtHeadlessSurfaceFn::load(|name| unsafe {
19            mem::transmute(entry.get_instance_proc_addr(handle, name.as_ptr()))
20        });
21        Self { handle, fp }
22    }
23
24    /// <https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkCreateHeadlessSurfaceEXT.html>
25    pub unsafe fn create_headless_surface(
26        &self,
27        create_info: &vk::HeadlessSurfaceCreateInfoEXT,
28        allocation_callbacks: Option<&vk::AllocationCallbacks>,
29    ) -> VkResult<vk::SurfaceKHR> {
30        let mut surface = mem::zeroed();
31        (self.fp.create_headless_surface_ext)(
32            self.handle,
33            create_info,
34            allocation_callbacks.as_raw_ptr(),
35            &mut surface,
36        )
37        .result_with_success(surface)
38    }
39
40    pub const fn name() -> &'static CStr {
41        vk::ExtHeadlessSurfaceFn::name()
42    }
43
44    pub fn fp(&self) -> &vk::ExtHeadlessSurfaceFn {
45        &self.fp
46    }
47
48    pub fn instance(&self) -> vk::Instance {
49        self.handle
50    }
51}