iced_wgpu/image/atlas/
allocator.rs

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1use guillotiere::{AtlasAllocator, Size};
2
3pub struct Allocator {
4    raw: AtlasAllocator,
5    allocations: usize,
6}
7
8impl Allocator {
9    pub fn new(size: u32) -> Allocator {
10        let raw = AtlasAllocator::new(Size::new(size as i32, size as i32));
11
12        Allocator {
13            raw,
14            allocations: 0,
15        }
16    }
17
18    pub fn allocate(&mut self, width: u32, height: u32) -> Option<Region> {
19        let allocation =
20            self.raw.allocate(Size::new(width as i32, height as i32))?;
21
22        self.allocations += 1;
23
24        Some(Region { allocation })
25    }
26
27    pub fn deallocate(&mut self, region: &Region) {
28        self.raw.deallocate(region.allocation.id);
29
30        self.allocations = self.allocations.saturating_sub(1);
31    }
32
33    pub fn is_empty(&self) -> bool {
34        self.allocations == 0
35    }
36
37    pub fn allocations(&self) -> usize {
38        self.allocations
39    }
40}
41
42pub struct Region {
43    allocation: guillotiere::Allocation,
44}
45
46impl Region {
47    pub fn position(&self) -> (u32, u32) {
48        let rectangle = &self.allocation.rectangle;
49
50        (rectangle.min.x as u32, rectangle.min.y as u32)
51    }
52
53    pub fn size(&self) -> crate::core::Size<u32> {
54        let size = self.allocation.rectangle.size();
55
56        crate::core::Size::new(size.width as u32, size.height as u32)
57    }
58}
59
60impl std::fmt::Debug for Allocator {
61    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
62        write!(f, "Allocator")
63    }
64}
65
66impl std::fmt::Debug for Region {
67    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
68        f.debug_struct("Region")
69            .field("id", &self.allocation.id)
70            .field("rectangle", &self.allocation.rectangle)
71            .finish()
72    }
73}
iced_wgpu/image/atlas/allocator.rs

iced_wgpu/image/atlas/
allocator.rs
