wgpu_rust_renderer/renderer/
wgpu_indices.rs

1// @TODO: Should we reuse wgpu_attributes?
2
3use std::collections::HashMap;
4
5use crate::{
6	geometry::index::Index,
7	resource::resource::{
8		ResourceId,
9		ResourcePools,
10	},
11};
12
13pub struct WGPUIndices {
14	indices: HashMap<ResourceId<Index>, wgpu::Buffer>,
15}
16
17impl WGPUIndices {
18	pub fn new() -> Self {
19		WGPUIndices {
20			indices: HashMap::new()
21		}
22	}
23
24	pub fn borrow(&self, index: &ResourceId<Index>) -> Option<&wgpu::Buffer> {
25		self.indices.get(index)
26	}
27
28	// @TODO: Implement correctly
29	pub fn update(
30		&mut self,
31		device: &wgpu::Device,
32		pools: &ResourcePools,
33		index_rid: &ResourceId<Index>,
34	) {
35		if !self.indices.contains_key(index_rid) {
36			if let Some(index) = pools.borrow::<Index>().borrow(index_rid) {
37				self.indices.insert(*index_rid, create_buffer(
38					device,
39					bytemuck::cast_slice(index.borrow_data()),
40					wgpu::BufferUsages::INDEX,
41				));
42			}
43		}
44	}
45}
46
47// @TODO: Remove duplication with wgpu_attributes.rs
48fn create_buffer(device: &wgpu::Device, contents: &[u8], usage: wgpu::BufferUsages) -> wgpu::Buffer {
49	use wgpu::util::DeviceExt;
50	device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
51		label: None,
52		contents:  contents,
53		usage: usage,
54	})
55}
wgpu_rust_renderer/renderer/wgpu_indices.rs

wgpu_rust_renderer/renderer/
wgpu_indices.rs
