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ElementLayout

bevy_render::mesh::allocator

Struct ElementLayout 

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pub struct ElementLayout { /* private fields */ }
Expand description

Information about the size of individual elements (vertices or indices) within a slab.

Slab objects are allocated in units of slots. Usually, each element takes up one slot, and so elements and slots are equivalent. Occasionally, however, a slot may consist of 2 or even 4 elements. This occurs when the size of an element isn’t divisible by COPY_BUFFER_ALIGNMENT. When we resize buffers, we perform GPU-to-GPU copies to shuffle the existing elements into their new positions, and such copies must be on COPY_BUFFER_ALIGNMENT boundaries. Slots solve this problem by guaranteeing that the size of an allocation quantum is divisible by both the size of an element and COPY_BUFFER_ALIGNMENT, so we can relocate it freely.

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impl Clone for ElementLayout

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fn clone(&self) -> ElementLayout

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Hash for ElementLayout

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for ElementLayout

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fn eq(&self, other: &ElementLayout) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl SlabItemLayout for ElementLayout

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fn size(&self) -> u64

The size in bytes of a single element. Read more
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fn elements_per_slot(&self) -> u32

The number of elements that make up a single slot.
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fn buffer_usages(&self) -> BufferUsages

The wgpu buffer usages that the slab allocator will specify when creating buffers. Read more
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impl Copy for ElementLayout

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impl Eq for ElementLayout

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impl StructuralPartialEq for ElementLayout

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T, U> AsBindGroupShaderType<U> for T
where U: ShaderType, &'a T: for<'a> Into<U>,

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fn as_bind_group_shader_type(&self, _images: &RenderAssets<GpuImage>) -> U

Return the T ShaderType for self. When used in AsBindGroup derives, it is safe to assume that all images in self exist.
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Downcast for T
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fn into_any(self: Box<T>) -> Box<dyn Any>

Converts Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>, which can then be downcast into Box<dyn ConcreteType> where ConcreteType implements Trait.
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Converts &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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Converts &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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fn into_any_sync(self: Box<T>) -> Box<dyn Any + Send + Sync>

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

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where T: Any + Eq,

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fn dyn_eq(&self, other: &(dyn DynEq + 'static)) -> bool

This method tests for self and other values to be equal. Read more
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impl<T> DynHash for T
where T: DynEq + Hash,

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fn dyn_hash(&self, state: &mut dyn Hasher)

Feeds this value into the given Hasher.
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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Returns the argument unchanged.

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const WITNESS: W = W::MAKE

A constant of the type witness
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where T: ?Sized,

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const TYPE_EQ: TypeEq<T, <T as Identity>::Type> = TypeEq::NEW

Proof that Self is the same type as Self::Type, provides methods for casting between Self and Self::Type.
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type Type = T

The same type as Self, used to emulate type equality bounds (T == U) with associated type equality constraints (T: Identity<Type = U>).
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