blob: 7e82209ac3796a157d505317df845445b9645d75 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
//! Utility structs & functions
use anyhow::Result;
/// Keeps a given resource for each swapchain image
pub struct TargetSpecificResources<T> {
elements: Vec<T>,
next_idx: usize,
}
impl<T> TargetSpecificResources<T> {
/// Create a new set of resources, given a function to generate them and the count
/// In most cases, count should be swapchain_properties.image_count
pub fn new<F>(mut generator: F, count: usize) -> Result<Self>
where
F: FnMut() -> Result<T>,
{
let mut elements = Vec::with_capacity(count);
for _ in 0..count {
elements.push(generator()?);
}
Ok(TargetSpecificResources {
elements,
next_idx: 0,
})
}
/// Get the next resource, wrapping around if necessary.
pub fn get_next(&mut self) -> &T {
let el = &self.elements[self.next_idx];
self.next_idx = (self.next_idx + 1) % self.elements.len();
el
}
/// Dissolve the resource set, returning an iterator over each item.
/// In most cases, each item will need deactivated.
pub fn dissolve(self) -> impl Iterator<Item = T> {
self.elements.into_iter()
}
}
|
