loam_render/
depth.rs

1use wgpu::{
2    Device, Extent3d, TextureDescriptor, TextureDimension, TextureFormat, TextureUsages,
3    TextureView, TextureViewDescriptor,
4};
5
6pub struct DepthBuffer {
7    pub view: TextureView,
8    pub format: TextureFormat,
9    size: (u32, u32),
10}
11
12impl DepthBuffer {
13    pub fn new(device: &Device, format: TextureFormat, size: (u32, u32)) -> Self {
14        let texture = device.create_texture(&TextureDescriptor {
15            label: Some("loam-render DepthBuffer"),
16            size: Extent3d {
17                width: size.0,
18                height: size.1,
19                depth_or_array_layers: 1,
20            },
21            mip_level_count: 1,
22            sample_count: 1,
23            dimension: TextureDimension::D2,
24            format,
25            usage: TextureUsages::RENDER_ATTACHMENT,
26            view_formats: &[],
27        });
28        let view = texture.create_view(&TextureViewDescriptor::default());
29        Self { view, format, size }
30    }
31
32    pub fn ensure(
33        slot: &mut Option<DepthBuffer>,
34        device: &Device,
35        format: TextureFormat,
36        size: (u32, u32),
37    ) {
38        let needs_recreate = match slot {
39            Some(b) => b.format != format || b.size != size,
40            None => true,
41        };
42        if needs_recreate {
43            *slot = Some(DepthBuffer::new(device, format, size));
44        }
45    }
46}
loam_render/depth.rs

loam_render/
depth.rs
