50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
use super::BindingDescriptor;
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use bevy_utils::AHasher;
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use std::hash::{Hash, Hasher};
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#[derive(Clone, Debug, Eq)]
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pub struct BindGroupDescriptor {
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pub index: u32,
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pub bindings: Vec<BindingDescriptor>,
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pub id: BindGroupDescriptorId,
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}
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#[derive(Hash, Copy, Clone, Eq, PartialEq, Debug)]
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pub struct BindGroupDescriptorId(u64);
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impl BindGroupDescriptor {
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pub fn new(index: u32, bindings: Vec<BindingDescriptor>) -> Self {
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let mut descriptor = BindGroupDescriptor {
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index,
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bindings,
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id: BindGroupDescriptorId(0),
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};
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descriptor.update_id();
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descriptor
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}
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pub fn update_id(&mut self) {
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let mut hasher = AHasher::default();
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self.hash(&mut hasher);
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self.id = BindGroupDescriptorId(hasher.finish());
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}
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}
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impl Hash for BindGroupDescriptor {
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fn hash<H: Hasher>(&self, state: &mut H) {
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// TODO: remove index from hash state (or at least id), and update the PartialEq implem.
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// index is not considered a part of a bind group on the gpu.
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// bind groups are bound to indices in pipelines.
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self.index.hash(state);
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self.bindings.hash(state);
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}
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}
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impl PartialEq for BindGroupDescriptor {
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fn eq(&self, other: &Self) -> bool {
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// This MUST be kept in sync with the hash implementation above
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self.index == other.index && self.bindings == other.bindings
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}
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}
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